To assemble a three-way valve without weakening the bond between a driver and a shaft with grease adhering to the shaft end, a straight flow path includes two ends and an intermediate portion respectively continuous with first to third ports, and first and second valve orifices having opening areas changed when first and second valve elements (34a, 34b) at the bottom of the shaft (35) move. The shaft extends through a bearing (42) in a guide (41) with its top bonded inside the cylindrical driver (50). The driver includes a gear (51) at the top and an externally threaded portion (53) at the bottom. The guide includes an internally threaded portion (43) above the bearing to receive the externally threaded portion. The driver includes a cylindrical portion (54) protruding downward from the externally threaded portion with its outer diameter smaller than an inner diameter of the internally threaded portion.
F16K 31/04 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic using a motor
F16K 11/044 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
F16K 41/04 - Spindle sealings with stuffing-box with at least one ring of rubber or like material between spindle and housing
A water heater connection system may include: water heaters connected in parallel between a water supply pipe and a discharge pipe; and a connection controller which controls the heaters. Each heater may include: a burner which heats water flowing from the supply pipe to the heater as required; a valve which regulates a flow rate of the water flowing from the supply pipe to the heater; a sensor which detects the water flow rate flowing from the supply pipe to the heater; and an individual controller which communicates with the connection controller. The individual controller may operate in a disconnected mode when the individual controller cannot communicate with the connection controller. When the sensor does not detect water flow in the disconnected mode, the individual controller may stand by with the valve set to a first opening degree being smaller than fully open and larger than fully closed.
A water heating system includes an enclosure having a thermally-insulated top and a plurality of thermally-insulated walls, the enclosure being at least substantially open at a bottom of the enclosure and adapted for mounting above an opening in a roof of a building. The water heating system also includes a water heater mounted within an interior of the enclosure.
F24H 1/12 - Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
F24H 1/00 - Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
F24H 9/00 - FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL Details
Provided is a centrifugal fan with which an improvement in the cooling performance of a motor can be achieved. In this centrifugal fan 1, a first gap part S1, which is obtained by separating a portion of a motor support wall 93 from a motor wall 31 in the axial direction of a drive shaft 35 over a range from an outer peripheral edge 31E of the motor wall 31 to a boss part 33, is formed between the motor support wall 93 and the motor wall 31. A second gap part S2, which is obtained by separating an inner peripheral edge 97E of an opening part 97 from the boss part 33 in the radial direction of the drive shaft 35, is formed between the opening part 97 and the boss part 33. A gap region E3 that communicates with the first gap part S1 and the second gap part S2 is formed between the motor support wall 93 and a main plate 51. A communication hole 50C that allows the gap region E3 to communicate with the inside of an impeller 50 is provided to pass through the main plate 51 on the radial inside of each blade 53.
This parent-child burner is composed of a child burner (4) and a parent burner (5) surrounding the child burner. A child burner body (41) has a child burner inflow pipe part (45) positioned on a top plate 2 of a heating cooker. The tip of a child burner nozzle (46) facing an opening at the upstream end of the child burner inflow pipe part (45) is lower than a parent burner body (51) and positioned radially inward of the outer periphery of the parent burner body (51) when viewed from above, and thus an excessive temperature rise of the child burner inflow pipe part (45) due to radiant heat from the parent burner body (51) can be suppressed. A heat radiation part (47) for discharging the heat of the child burner body (41) to the outside is provided on the outer surface of the child burner body (41). Preferably, the heat radiation part (47) is provided on the outer surface of at least the child burner inflow pipe part (45) and portions near the child burner inflow pipe part (45).
F23D 14/06 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
F23D 14/64 - Mixing devicesMixing tubes with injectors
This gas burner includes: a burner body 4 rising from a downstream end of a gas inflow pipe 3; and a burner head 5 placed on the burner body 4. The burner body 4 has therein a distribution chamber 42 into which gas flows through the gas inflow pipe 3. The burner head 5 has an exposed annular wall 51 on an outer peripheral surface of the burner head. A plurality of flame holes 52a for ejecting gas from the distribution chamber 42 are provided to the annular wall at intervals in a circumferential direction. In the gas burner, manufacturing control of the burner head 5 is facilitated, and combustion performance including backfire suppression performance can be stabilized. The burner head 5 has therein a distribution passage 53 for distributing gas from the distribution chamber 42 to the flame hole. A backfire suppression member 54 composed of a porous body made from metal or ceramic is interposed in the distribution passage 53 so that the gas passing through the backfire suppression member 54 is distributed to the flame holes 52a.
F23D 14/06 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
F23D 14/22 - Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
The present invention provides a gas burner in which deviation of actual maximum thermal power from defined maximum thermal power can be suppressed and which comprises a burner body (4) that rises from the downstream end of a gas inflow pipe (3) and a burner head (5) that is placed on the burner body (4), wherein: the burner body (4) has a distribution chamber (42) into which a fuel gas flows via the gas inflow pipe (3); the burner head (5) has an annular wall (51) which is exposed to the outer peripheral surface of the burner head; and the annular wall is provided with a plurality of flame holes (52a) which are present in the circumferential direction with spaces therebetween and through which the fuel gas from the distribution chamber (42) is blown out, diffused, and burned. The distribution chamber (42) is provided with a flow rate adjustment plate (43) that has a plurality of ventholes (431) through which the fuel gas flowing in from the gas inflow pipe (3) passes toward the burner head (5). The maximum thermal power of the gas burner is defined by the total opening area of the ventholes (431).
Provided is a concentric burner configured from a slave burner and a master burner surrounding the slave burner, the slave burner being provided with a slave burner inflow pipe (45) that extends in a horizontal direction on a top plate of a heating cooker from a slave burner body (41), and being such that a slave burner nozzle (46) is attached to a burner holder (461) that is exposed on the top plate of the heating cooker at a position below a master burner body (51), making it possible to suppress any excessive increase in the temperature of a nozzle holder (461) and the slave burner inflow pipe (45) resulting from radiant heat from the master burner body (51). A heat-radiating part (57) is provided to the outer surface of the master burner body (51), the heat-radiating part (57) being positioned at a portion separated from a straight upper part of the nozzle holder (461) in the circumferential direction and discharging the heat of the master burner body (51) to the outside.
F23D 14/06 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
F23D 14/64 - Mixing devicesMixing tubes with injectors
This gas burner includes: a burner body 4 rising from a downstream end of a gas inflow pipe 3 to which fuel gas is supplied from a gas nozzle 32; and a burner head 5 placed on the burner body 4. The burner body 4 has therein a distribution chamber 42 into which gas flows through the gas inflow pipe 3. The burner head 5 has an exposed annular wall 51 on an outer peripheral surface of the burner head. Flame holes for ejecting gas from the distribution chamber 42 are provided to the annular wall at intervals in a circumferential direction. In the gas burner, it is possible to prevent backfire from reaching the gas nozzle 32 when an ignition operation is performed in a state in which the burner head 5 has been left unattached to the burner body 4. A backfire suppression member 43 having a ventilation part 431 through which gas passes is provided in the distribution chamber 42 or the gas inflow pipe 3.
F23D 14/06 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
F23D 14/22 - Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
F24C 3/02 - Stoves or ranges for gaseous fuels with heat produced solely by flame
This heat source machine stores, in a housing, a combustion case having a built-in heat exchanger in which a burner is attached to the front end, and a fan connected to a gas inflow pipe part extending downward from the burner, the heat source machine making it possible to remove only the fan from the front in a state where the combustion case is assembled to the housing in order to improve workability during maintenance. The present invention comprises: a cylindrical inflow pipe-side joint part (22) provided at the upstream end of the gas inflow pipe part; and a cylindrical fan-side joint part (52) provided at the downstream end of the fan and fitted to the inflow pipe-side joint part (22). The inflow pipe-side joint part (22) is provided with a first protruding piece part (221) so as to protrude along a surface orthogonal to the front-rear direction, and the fan-side joint part (52) is provided with a second protruding piece part (521) that overlaps the first protruding piece part (221) in the front-rear direction. Both the first and second protruding piece parts (221, 521) are fastened by a fastening member (53) inserted from the front into holes (222, 522) in the front-rear direction formed in both the protruding piece parts.
F24H 1/16 - Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled
37 - Construction and mining; installation and repair services
41 - Education, entertainment, sporting and cultural services
Goods & Services
Providing information related to the installation, maintenance and repair of water heaters Providing online training in the field of water heaters; Providing online training in the field of installation, maintenance and repair of water heaters
National University Corporation Tokai National Higher Education and Research System (Japan)
Inventor
Ono, Takahiro
Asahara, Makoto
Miyasaka, Takeshi
Asato, Katsuo
Abstract
A total primary combustion burner which includes a burner body with an air-fuel mixture chamber into which an air-fuel mixture of a fuel gas and primary air is supplied, a combustion plate portion covering an opening surface, which faces the air-fuel mixture chamber, of the burner body, and a backfire suppressing plate portion disposed opposite the combustion plate portion with a gap inside the air-fuel mixture chamber. The air-fuel mixture passing through the backfire suppressing plate portion ejects from the combustion plate portion and undergoes combustion. The total primary combustion burner is configured so that backfire can be suppressed as much as possible while suppressing pressure loss, even when using hydrogen as the fuel gas. The backfire suppressing plate portion has a sintered sheet obtained by sintering a laminate made by sintering an aggregate of metallic fibers or beads.
A mixing device disclosed in the present specification comprises: a first inflow part into which a first fluid flows; a second inflow part into which a second fluid flows; an outflow part from which a mixed fluid flows out; a plurality of first fluid passages each of which communicates between the first inflow part and the outflow part; and a plurality of second fluid passages each of which communicates between the second inflow part and each of the plurality of first fluid passages. Each of the plurality of first fluid passages has a diameter-decreasing passage where the passage decreases in diameter, and a diameter-increasing passage which is provided downstream of the diameter-decreasing passage and where the passage increases in diameter. Each of the plurality of second fluid passages is formed in a straight line from the upstream end to the downstream end, and some of the plurality of second fluid passages are disposed such that the upstream end is positioned in a first direction when viewed from the downstream end, the remainder being disposed such that the upstream end is positioned in the first direction or in a second direction different from the first direction when viewed from the downstream end.
B01F 25/312 - Injector mixers in conduits or tubes through which the main component flows with Venturi elementsDetails thereof
B01F 23/2326 - Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles adding the flowing main component by suction means, e.g. using an ejector
B01F 25/452 - Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
National University Corporation Tokai National Higher Education and Research System (Japan)
Inventor
Ono, Takahiro
Asahara, Makoto
Miyasaka, Takeshi
Asato, Katsuo
Abstract
A hydrogen combustion burner utilizing hydrogen gas as a fuel gas includes a burner body with an air-fuel mixture chamber into which an air-fuel mixture of hydrogen gas and primary air is supplied and a combustion plate portion covering an opening surface, which faces the air-fuel mixture chamber, of the burner body. In the hydrogen combustion burner, the air-fuel mixture ejects from the combustion plate portion and undergoes combustion. The hydrogen combustion burner is configured to effectively suppress backfire. The combustion plate portion includes a sintered sheet by sintering an aggregate of metallic fibers, and the aggregate is not formed by weaving or knitting the metallic fibers.
In a premixing apparatus for mixing a fuel gas with air and supplying an air-fuel mixture to a burner through a fan, a downstream end of a gas supply passage is connected to a gas suction portion that is provided in an air supply passage which is located on an upstream side of the fan, and a butterfly valve is provided in a portion of the passage, which is located on an upstream side from the gas suction portion, and is rotatable to at least an open attitude and a closed attitude. At least one ventilation opening through which air flows from an upstream side to a downstream side of the valve at the closed attitude is formed in the valve, and a size of the valve is set so that, at the closed attitude, a clearance between an outer peripheral edge of the valve and a peripheral wall surface of the passage is substantially closed.
Provided is a concentric burner which is formed of a slave burner 4 and a master burner 5 surrounding the slave burner and in which a slave burner inflow pipe 45 and a slave burner nozzle 46 facing the upstream end of the slave burner inflow pipe are arranged on a cooking stove top plate 2, and the tip of the slave burner nozzle is positioned below the master burner 5 and further inward in the radial direction than the outer periphery of the master burner when viewed from above, said concentric burner making it possible to sufficiently suction primary air even if the length of a slave burner inflow pipe is short. The slave burner body 41 has an extension part 413 extending below a slave burner distribution chamber 43. An internal gap 414 communicating with the slave burner distribution chamber 43 is provided in a predetermined range in the circumferential direction of the extension part 413. The circumferential center portion of the internal gap 414 is formed in a narrow portion 4141 in which the radial width is narrower than the radial width of the other portion of the internal gap. The downstream end of the slave burner inflow pipe 45 communicates with the narrow portion 4141 of the internal gap 414, and is arranged so as to extend radially outward along a radial line passing through the center in the circumferential direction of the narrow portion.
F23D 14/06 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
F23K 5/00 - Feeding or distributing other fuel to combustion apparatus
F23L 1/00 - Passages or apertures for delivering primary air for combustion
Provided is a concentric burner which is formed of a slave burner and a master burner surrounding the slave burner and in which a slave burner inflow pipe 45 and a slave burner nozzle 46 facing an opening 451 at the upstream end of the slave burner inflow pipe are arranged on a cooking stove top plate 2, and the tip of the slave burner nozzle 46 is positioned below the master burner and further inward in the radial direction than the outer periphery of the master burner when viewed from above, said concentric burner making it possible to suppress the fuel gas injected from the slave burner nozzle 46 from being blown from the side by an air flow generated between the top plate 2 and the master burner. A pair of wind shielding walls 47, 47 are provided that cover the gap between the tip of the slave burner nozzle 46 and the opening 451 at the upstream end of the slave burner inflow pipe 45 from both sides in the horizontal direction orthogonal to the direction in which the tip of the slave burner nozzle 46 and the upstream end of the slave burner inflow pipe 45 face each other.
F23D 14/06 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
The facility equipment cooperation system includes an external server and facility equipment. The facility equipment acquires equipment information including installation place information regarding an installation place of the facility equipment, and transmits the equipment information to an external server. The external server transmits external server information including information according to an installation environment of the facility equipment to the facility equipment on the basis of the equipment information. The facility equipment updates the inspection information stored in the inspection information storage unit on the basis of the external server information. The comparison and determination unit of the facility equipment compares the updated inspection information with the usage condition information stored in the usage condition storage unit, and determines whether or not the inspection time has come.
This apparatus is provided with: a container that is open to the atmosphere; a liquid passage through which a liquid flows; an air introduction part that introduces air into the liquid passage; and a fine bubble generation part that is provided in the liquid passage and that generates fine bubbles in the liquid flowing through the liquid passage by using the air introduced into the liquid passage. The air introduction part includes: an intake port that is opened to the inside of the container; and an air introduction path that links the inside of the liquid passage and the intake port.
F24H 1/14 - Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
A47L 15/42 - Washing or rinsing machines for crockery or table-ware Details
B01F 23/23 - Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
B01F 25/10 - Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
B01F 25/45 - Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
C02F 1/66 - Treatment of water, waste water, or sewage by neutralisationTreatment of water, waste water, or sewage pH adjustment
F24D 3/10 - Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks
F24H 9/00 - FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL Details
This thermal apparatus comprises: a heating unit that heats up a thermal medium; a heating circuit that includes a heat outward path for feeding the thermal medium heated up by the heating unit to a heating device that generates heat by radiating heat from the thermal medium, and a heat return path for feeding the thermal medium, which has been subjected to heat radiated by the heating device, to the heating unit; a pump that is provided in the heating circuit, feeds the thermal medium from the heating unit to the heating device via the heat outward path, and feeds the thermal medium from the heating device to the heating unit via the heat return path; and a fine bubble generation unit that is provided in the heating circuit and generates fine bubbles in the thermal medium flowing through the heating circuit.
Provided are: a cooking system that allows a user to remotely operate a heat-based cooking apparatus while ensuring safety when cooking food using the heat-based cooking apparatus; and a heat-based cooking apparatus. A cooking system 100 includes a heat-based cooking apparatus 10, a cooking control unit 52, a communication unit 57, and an input/output unit 53. The communication unit 57 communicates with an external information processing terminal 8 via a network NW1. The information processing terminal 8 is capable of transmitting a cooking command for a heating unit 11 to the cooking control unit 52 via the communication unit 57. When the cooking command is received from the information processing terminal 8, the cooking control unit 52 relays the cooking command to the heating unit 11 when an operation input for approving the cooking command is performed on the input/output unit 53, and executes heating of a cooking container 20 by the heating unit 11 on the basis of the cooking command.
KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
Inventor
Ito, Takashi
Okano, Yuka
Yoshida, Mahoko
Iwama, Yuko
Yamada, Tomomi
Umeda, Yojiro
Shimabukuro, Daisuke
Hayashi, Junya
Akita, Naoshige
Yamada, Kengo
Abstract
In a cooking system (100), a cooking control part (52) has a terminal communication part (57) that performs one-to-one communication with each of first through third communication parts (17, 27, 37A, 37B). The first communication part (17) sends a state of a heating part (11) ascertained by a heating control part (12) to the terminal communication part. The second communication part (27) sends detection results from a first state sensor (26) to the terminal communication part. The third communication part (37A, 37B) sends detection results from a second state sensor (36A, 36B) to the terminal communication part. Based on the information received by the terminal communication part, the cooking control part generates and sends a cooking command for the heating part from the terminal communication part to the first communication part. The heating control part controls the cooking (heating) based on the cooking command.
H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Provided is a totally aerated combustion burner that has good lift resistance regardless of fuel gas types and can use both hydrocarbon gas and hydrogen gas as fuel gas. The totally aerated combustion burner is provided with: a burner body (1) that has an air-fuel mixture chamber (11) which is supplied with an air-fuel mixture of fuel gas and primary air; and a combustion plate part (2) that covers an open surface of the burner body, facing the air-fuel mixture chamber. The combustion plate part includes: a frame-shaped burner framework (21); a sintered body sheet (23) which covers an opening part of the burner framework from the burner body side and which is obtained by sintering a laminate having metal fibers laminated therein; and a distribution plate (24) which, together with the burner framework, sandwiches the sintered body sheet and which has formed therein a large number of slit-shaped distribution holes (24a). A plurality of distribution hole rows comprising a plurality of distribution holes arranged at intervals in the Y-axis direction, which is the short direction of the distribution holes, are arranged side by side in the X-axis direction, which is the long direction. The slit width is set in a range of 0.3-0.6 mm, and the slit pitch is set in a range of 6-10 mm.
A water heater (1) includes a housing (8), combustion devices (31, 32), heat exchangers (41A to 42B), a water supply pipe (P1), a hot water supply pipe (P2), a water supply connection member (10), a hot water supply connection member (20), a water quantity control part (50), and a fine bubble generator (9) in fluid connection with either the water supply pipe (P1) or the hot water supply pipe (P2). The fine bubble generator (9) has an inflow port (91H), into which hot water flows from an upstream side (P2U), and an outflow port (92H), out of which hot water containing the fine bubbles is discharged to a downstream side (P2D). The fine bubble generator (9) is located below burner ports (31F, 32F) of the combustion devices.
This premixing device mixes a fuel gas with air and supplies the air-fuel mixture to a burner via a fan. A butterfly valve 8 is provided positioned on the upstream side of a gas suction section to which a downstream end of a gas supply passage is connected in an air supply passage on the upstream side of the fan, and the premixing device makes it possible to prevent, over a long period of time, the inability to ensure the amount of air required when the butterfly valve 8 is in a closed orientation. A ventilation opening 82 through which air flows from the upstream side to the downstream side of the butterfly valve 8 when in the closed orientation is formed in the butterfly valve 8. In addition, a protrusion 84 protruding in the thickness direction of the butterfly valve 8 is provided positioned on a side surface 83 of the butterfly valve 8 in a part of the area around the ventilation opening 82 on the upstream side when the butterfly valve 8 is in an open orientation.
A premixing device provided with a butterfly valve 62 driven by a stepping motor 621 in an air supply passage 6 includes a detection means 9 composed of a magnet 91, a magnetic switch 92, and a magnetic shielding plate 93 rotating together with the butterfly valve, the premixing device being configured so that when the butterfly valve enters a rotation range between an open position and a predetermined state close thereto, the magnetic switch is turned on. Even if a malfunction occurs in which the butterfly valve is locked within the rotation range where the magnetic switch is turned off just before the butterfly valve reaches a closed position, this malfunction can be detected. The butterfly valve 62 is rotated from the close position to the open position to ascertain the number of steps of the stepping motor 621 when the magnetic switch 92 is switched from off to on. If the number of steps is deviated by a predetermined value or more from the reference number of steps required for rotating the butterfly valve 62 from the close position to the predetermined position, it is determined that an abnormality is present.
This premixing device comprises: a variable throttle valve 74 which is driven by a stepping motor 743 and a zero governor provided in a gas supply passage; and a detection means 747 which detects the movement of a valve body 742 of the variable throttle valve. The detection means has a detection switch 7471, which is turned on when the valve body of the variable throttle valve enters a first stroke range on the closing side and which is turned off when the valve body enters a second stroke range on the opening side, and is set to be able to accurately detect a failure in the variable throttle valve. After the valve body 742 of the variable throttle valve 74 is moved to the stroke end position in the closing direction to determine the origin, the valve body 742 is moved in the opening direction. When the number of steps of the stepping motor 743 at a time point when the detection switch 7471 is switched from on to off as a result of the movement is deviated, by a predetermined value or more, from a reference number of steps required for movement from the origin position to entering the second stroke range, it is determined that an abnormality is occurring.
F23K 5/00 - Feeding or distributing other fuel to combustion apparatus
F16K 37/00 - Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
This heating and cooking apparatus HC is provided with an apparatus body 1 that has: an upper storage chamber 12 having an opening part 11 above and capable of storing a cooking container Kt through the opening part; and a lower storage chamber 13 communicating with the upper storage chamber and in which a burner Bn is disposed. The apparatus is configured to suppress overflow to the outside of the apparatus body as much as possible, even if hydrogen flame propagates to an introduction passage 4 for introducing secondary air, when hydrogen gas jetted from a combustion plate 3 of the burner is subjected to diffusion combustion. The introduction passage is provided with a flame shielding part 6 for flame-shielding the hydrogen flame when the hydrogen flame propagates in the introduction passage while allowing ventilation of the secondary air.
This heating cooker HC comprising a cooker main body having an upper storage chamber 12, which has an opening 11 on top and in which a cooking container Kt can be stored through the opening, and a lower storage chamber 13, which communicates with the upper storage chamber and in which a burner Bn is disposed, is configured to uniformly heat the cooking container by equalizing the heights of hydrogen flames from a combustion plate 3 of the burner even in a state where the amount of hydrogen gas jetting from each part of the combustion plate 3 is not uniform when performing diffusion combustion of the hydrogen gas jetting from the combustion plate 3. Introduction passages 4 for introducing secondary air are provided, the introduction passages each having: an intake port 41, which opens in an outer surface of an outer wall part of the cooker main body surrounding the lower storage chamber; and a discharge port 42, which opens in an inner surface of the outer wall part. The plurality of introduction passages are provided at intervals in the circumferential direction in a plan view.
A hot water system comprising a heat pump and a storage portion. The hot water system being unitary or modular and configured to allow a user to easily connect and disconnect parts. A heat pump and heat exchanger for the hot water system, the heat pump comprising a base under which the heat exchanger is mounted and the heat exchanger comprising a spirally wound coil. The heat pump configured to sit on top of the storage portion. A method of controlling the heat pump and a heating element associated with the storage portion.
A controller for a tankless water heater is programmed to perform a descaling procedure that includes: closing a bypass valve to prevent fluid from bypassing a heat exchanger of the tankless water heater; activating a pump to cause a descaling solution to circulate through the tankless water heater; monitoring a flow rate of the descaling solution; and deactivating the pump responsive to one of: i) an amount of time that the pump is active exceeding a time limit, ii) the flow rate exceeding a first threshold, or iii) a change in the flow rate exceeding a second threshold.
F24H 15/429 - Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data for selecting operation modes
F24H 15/464 - Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible using local wireless communication
A hot water system comprising a heat pump and a storage portion. The hot water system being unitary or modular and configured to allow a user to easily connect and disconnect parts. A heat pump and heat exchanger for the hot water system, the heat pump comprising a base under which the heat exchanger is mounted and the heat exchanger comprising a spirally wound coil. The heat pump configured to sit on top of the storage portion. A method of controlling the heat pump and a heating element associated with the storage portion.
A hot water system comprising a heat pump and a storage portion. The hot water system being unitary or modular and configured to allow a user to easily connect and disconnect parts. A heat pump and heat exchanger for the hot water system, the heat pump comprising a base under which the heat exchanger is mounted and the heat exchanger comprising a spirally wound coil. The heat pump configured to sit on top of the storage portion. A method of controlling the heat pump and a heating element associated with the storage portion.
A hot water system comprising a heat pump and a storage portion. The hot water system being unitary or modular and configured to allow a user to easily connect and disconnect parts. A heat pump and heat exchanger for the hot water system, the heat pump comprising a base under which the heat exchanger is mounted and the heat exchanger comprising a spirally wound coil. The heat pump configured to sit on top of the storage portion. A method of controlling the heat pump and a heating element associated with the storage portion.
Provided is a combustion device comprising a burner which has a burner body and a combustion plate 12, and a combustion housing which surrounds a combustion space for an air-fuel mixture, said combustion device being provided with a thermal insulation material 7 which overlaps a portion of a combustion plate flange 122 at a peripheral edge of the combustion plate, said portion facing the internal space of the combustion housing, wherein a fixing plate 8 for the thermal insulation material is attached to the combustion plate flange, said fixing plate having a bent edge portion 81 that abuts the outside lateral edge of the thermal insulation material, and having a plurality of tongue-shaped retaining hooks 82 that retain the thermal insulation material and extend from the bent edge portion. With said combustion device, it is possible to prevent overheating of a central portion of the combustion plate flange due to the transfer of combustion heat via the fixing plate. The interval between retaining hooks 82, 82 that are adjacent to one another in the longitudinal direction of the fixing plate 8 is made wider towards a central portion of the fixing plate 8 in the longitudinal direction. When a plurality of notches 81b are formed in the bent edge portion 81 so as to leave behind a plurality of support pieces 81a, the support pieces 81a may be made narrower towards the central portion of the fixing plate 8 in the longitudinal direction.
This premixing device includes: a butterfly valve 6 and a switching valve 7 that switch the ventilation resistance of an air supply passage 2 and a gas supply passage 3; and an interlocking mechanism 8 that is connected to a rotary shaft 61 of the butterfly valve 6 and that opens and closes the switching valve 7 in conjunction with opening and closing of the butterfly valve 6. The interlocking mechanism 8 is disposed in a mechanism chamber 11 which is partitioned by a partition part 14 with respect to the air supply passage 2 and communicates with a downstream end part of the gas supply passage 3, and a shaft support hole 141 through which the rotary shaft 61 penetrates is formed in the partition part 14. Outside air enters into the shaft support hole 141 due to a pressure difference between an internal pressure of the air supply passage 2 and an internal pressure of the mechanism chamber 11, and the rotary shaft 61 is prevented from being fixed in the shaft support hole 141 by corrosion caused by salt contained in the outside air. A seal member 142 that seals a gap between the shaft support hole 141 and the rotary shaft 61 is provided in a section close to the air supply passage 2 of the shaft support hole 141.
By detecting the potential of a housing of an electrical device before and after a voltage for detection is applied to the housing, it is determined whether or not the potential of the housing increases by applying the voltage for detection. If the potential of the housing increases by applying the voltage for detection, it is determined that a ground fault, in which a ground wire is in conduction with the housing, is not occurring. Conversely, if the potential of the housing does not increase when the voltage for detection is applied, it is determined that a ground fault is occurring. Thus, the presence or absence of a ground fault in an electrical device can be easily detected.
A combustion device is provided in which an air-fuel mixture is supplied to a burner (1) via a fan (2), the combustion device being equipped with a gas amount adjustment means (44) for adjusting the fuel gas supply amount, a first flame rod (6), and a control means (5). In the combustion device, control is performed to regulate the fuel gas supply amount with the gas amount adjustment means (44) so that an excess air ratio of the air-fuel mixture obtained on the basis of a flame resistivity detected with the first flame rod (6) becomes a predetermined appropriate value. The combustion device is configured so that both the ability to detect an excess air ratio of the air-fuel mixture and the ability to detect ignition (presence or absence of flame) can be ensured. A second flame rod (7), which is different from the first flame rod (6), is disposed. The presence or absence of a flame is detected with the second flame rod (7), and the first flame rod (6) is used exclusively for detecting an excess air ratio of the air-fuel mixture.
F23N 5/24 - Preventing development of abnormal or undesired conditions, i.e. safety arrangements
F23N 1/02 - Regulating fuel supply conjointly with air supply
F23N 5/12 - Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
This roast cooking device comprising a burner 4 and an ingredient placement part 2 provided above the burner is configured to be capable of further improving the effect of washing down residual fat and salt from ingredients placed above the ingredient placement part. Hydrogen gas is used as a fuel gas to be supplied to the burner, and a water discharge means 6 has, below the ingredient placement part, a water discharge part 61 which discharges water composed of at least one among steam and water vapor.
A47J 27/04 - Cooking-vessels for cooking food in steamDevices for extracting fruit juice by means of steam
F23D 14/10 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
F23D 14/22 - Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
F23L 7/00 - Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
Provided is a ceramic cooking device comprising a burner 4 for burning hydrogen gas, and a food material placement part 2 provided above the burner, the ceramic cooking device being configured to have exceptional cooking properties such that it is possible to achieve ceramic cooking in both a state in which surface softness is imparted and a state in which surface crispness is imparted to a food material on the food material placement part. An introduction-position-varying means 6 for changing the introduction position of secondary air supplied to the burner is provided to the ceramic cooking device. When the ceramic cooking device comprises a housing 13 that surrounds a portion of the burner positioned below the food material placement part and extends downward, the introduction-position-varying means is configured from a closing change plate that is mounted to a lower-end opening 13b of the housing so as to be capable of changing a closing region of the lower-end opening.
F23D 14/10 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
F24C 3/02 - Stoves or ranges for gaseous fuels with heat produced solely by flame
(1) Water heaters; tankless water heaters (1) Promoting public awareness of tankless water heater technology; promoting the goods and services of others in the fields of water heaters and of water heater sales, installation and service
In a heat exchanger that includes heat-absorbing fins and heat-absorbing tubes, each of which pierces through a corresponding through hole formed by a burring process, when a brazing material held by each of brazing material holding portions is positioned above a corresponding missing portion, formed by removing a part of a burring wall of each of the through holes, melts and penetrates between each of the burring walls and the corresponding heat-absorbing tube, each of the brazing material holding portions is extended above the corresponding missing portion at a predetermined distance. A notched portion concaved downward is positioned on each side of the respective brazing material holding portions.
F28F 1/42 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
An engaging part (70) of a second component (6) has an engaging claw part (71) that protrudes outward from an engaging hole (51) and engages with an engaged part (50) of a first component (4). The engaged part (50) of the first component (4) has a contact engaging band part (53) that extends along the insertion direction of the engaging part (70) from a contact surface (52) at the peripheral edge of the engaging hole (51). The contact engaging band part (53) has a through groove part (55) that extends along the insertion direction of the engaging part (70) from the contact surface (52) and penetrates through an outer surface (530) of the contact engaging band part (53).
A ceramic cooking device comprising burners 3 in which hydrogen is combusted, and a lattice-form plate body 5 provided above the burners 3, the plate body 5 filling the role of an ingredient placement portion, the ceramic cooking device making it possible to improve an effect for allowing runoff of an excess oil fraction resulting from a water fraction contained in a hydrogen combustion gas. A supporting rod part 53 between long holes 52, 52 that are formed in the lattice-form plate body 5 and are adjacent to each other has an upper-end flat part 531 with which ingredients come into contact, a maximum-width part 532 in which the Y-direction width is maximized and which is set apart below the flat part 531, and a widening part 533 in which the width gradually increases from the flat part 531 toward the maximum-width part 532. It is preferable that a narrowing part 534 in which the width gradually decreases from the maximum-width part 532 toward the lower end of the supporting rod part 53 is also provided to the supporting rod part 53.
In a hot water supply apparatus including a heat exchanger to which water heated by renewable energy or waste heat from other heat sources is supplied, a controller performs an intermittent combustion control in which combustion and combustion stoppage in a burner are repeated as a condition in which a water supply temperature exceeds a predetermined upper limit of the water supply temperature. In the intermittent combustion control, a combustion fan is caused to operate during the combustion and to at least temporarily, preferably always, operate during the combustion stoppage.
In a heat exchanger, a respective meander passage 31, 32 in each of two stages connecting heat absorbing tubes 31 divided into the two stages and arranged in a flow direction of a combustion gas in an inside of a casing 1 from one side to the other side in a Y-axis direction is constituted, and a heat absorbing tube 31 of #11 at an upstream end of the meander passage 31 in a first stage at an upstream side of the flow direction of the combustion gas and a heat absorbing tube 31 of #21 at a downstream end of the meander passage 32 in the second stage at a downstream side of the combustion gas are made to be positioned at the one side in the Y-axis direction, a ventilation resistant portion 221, 2221, 2222 for suppressing the combustion gas from being directed to the heat absorbing tube 31 of #21 at the downstream end of the meander passage 32 in the second stage is provided.
F24H 3/08 - Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
F24H 9/00 - FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL Details
F28F 1/32 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
In a heat exchanger, a respective meander passage 31, 32 in each of two stages connecting heat absorbing tubes 31 divided into the two stages and arranged in a flow direction of a combustion gas in an inside of a casing 1 from one side to the other side in a Y-axis direction is constituted, and both a heat absorbing tube 31 of #11 at an upstream end of the meander passage 31 in one of the stages and a heat absorbing tube 31 of #21 at a downstream end of the meander passage 32 in the other of the stages are made to be positioned at the one side in the Y-axis direction, a distance La between the heat absorbing tubes 31, 31 of #11 and #21, is made longer than a respective distance Lb between each heat absorbing tube 31 other than the heat absorbing tube 31 of #11 at the upstream end of the meander passage 31 in the one of the stages and such each heat absorbing tube 31 other than the heat absorbing tube 31 of #21 at the downstream end of the meander passage 32 in the other of the stages as is the closest to each heat absorbing tube 31 other than the heat absorbing tube 31 of #11 at the upstream end in the one of the stages.
In a heat exchanger, a respective meander passage 31, 32 in each of two stages connecting heat absorbing tubes 31 divided into the two stages and arranged in a flow direction of a combustion gas in an inside of a casing 1 from one side to the other side in a Y-axis direction is constituted, and both a heat absorbing tube 31 of #11 at an upstream end of the meander passage 31 in a first stage and a heat absorbing tube 31 of #21 at a downstream end of the meander passage 32 in a second stage are made to be positioned at the one side in the Y-axis direction, notches are provided with each heat absorbing fin 2 at portions positioned at a more upstream side in the flow direction of the combustion gas than each heat absorbing tube 31 of the meander passage 32 in the second stage, and first notches 221 corresponding to the heat absorbing tube 31 at a downstream end of the meander passage 32 in the second passage are formed larger than second notches 222 corresponding to each heat absorbing tube 31 other than the heat absorbing tube 31 of #21 at the downstream end.
F28F 9/00 - CasingsHeader boxesAuxiliary supports for elementsAuxiliary members within casings
F28D 21/00 - Heat-exchange apparatus not covered by any of the groups
F28F 1/32 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
The present invention provides a heating system capable of implementing an inrush current countermeasure without causing an increase in cost. A control means of the heating system repeatedly executes, in a predetermined cycle, a sequence starting operation of the fluid flowing part, the predetermined cycle being divided into a plurality of operation start permitted intervals, and the operation start permitted intervals permitting, among the fluid flowing part, only a specific fluid flowing part determined for each operation start permitted interval, to start operating, and prohibiting the other fluid flowing part other than the specific fluid flowing part from starting to operate.
A connected combustion system detects a failure in any of combustors connected in the system and each including a burner with its combustion state used for feedback. Each combustor includes a combustion sensor that detects the combustion state in the burner, and a detection value is used for feedback. When the detection value deviates from a predetermined normal range, at least one of a fuel gas supply or an air supply is corrected to cause the detection value to be within the normal range. The combustion state in the burner is thus adjusted. When the combustion sensor in any of the combustors has a detection value deviating from the normal range and the combustion sensor in another combustor operating simultaneously with the above combustor has a detection value within the normal range, the combustor having the detection value deviating from the normal range is determined to have a failure.
F23R 3/16 - Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration with devices inside the flame tube or the combustion chamber to influence the air or gas flow
F23R 3/28 - Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
Provided is a parameter-setting program with which it is possible for a plurality of combustion devices to efficiently implement work for setting parameters that are necessary for operating the combustion devices. This parameter-setting program is actuated by an information terminal 50 that can perform wireless communication with combustion devices 10, the parameter-setting program being capable of causing the information terminal 50 to execute: a process for storing, in the information terminal 50 or in an external storage device, a parameter for one combustion device 10 that is inputted to the information terminal 50 when being set; a process, after the aforementioned storage, for displaying, on the information terminal 50, an option with which, when a parameter is set for another combustion device, the information terminal 50 is instructed to write the stored parameter to the other combustion device 10; and a process for writing the stored parameter to the other combustion device 10 in cases in which the option is selected.
H04Q 9/00 - Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
F24H 15/443 - Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using a central controller connected to several sub-controllers
F24H 15/464 - Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible using local wireless communication
In a combustion device provided with a solenoid opening/closing valve provided on a gas supply passage for a burner and a proportional valve with a governor function on the downstream side of the solenoid opening/closing valve, there is a risk in ignition in that if the opening of the solenoid opening/closing valve is delayed due to the adherence of the valve body to the valve seat and a solenoid of the proportional valve is energized in a condition in which the gas pressure in a first pressure chamber of the proportional valve is zero, the proportional valve would open at the maximum opening degree and explosion ignition could occur; the present invention prevents this. When igniting a burner, first the control of making the solenoid opening/closing valve open is performed (STEP3) and subsequently the control of energizing the solenoid of the proportional valve so as to make the opening degree of the proportional valve to be a predetermined ignition opening degree is performed (STEP5).
Provided is an exhaust adapter capable of ensuring a high degree of airtightness between a main body and an exhaust flow guide inside the main body. An exhaust adapter 1 comprises: a main body 2 provided with an exhaust outlet 11 for discharging combustion exhaust from a combustion device 30; an exhaust flow guide 3 which is provided inside the main body and which connects an exhaust pipe of the combustion device to the exhaust outlet; an exhaust flow passage portion 5 which constitutes a portion of the exhaust flow guide and which includes a flange 14 provided on an outer peripheral edge of an opening portion 13 that communicates with the exhaust outlet; packing 15 held in a compressed state between the flange of the exhaust flow passage portion and a main body inner surface of an outer peripheral portion of the exhaust outlet; and a sliding guide portion 18 which is provided on a main body inner surface and which is in pressure contact with an outer surface of a closing portion 16, which is a wall opposing the opening portion of the exhaust flow passage portion. A concave arcuate portion 18a that is inclined increasingly toward the exhaust outlet side with increasing distance from a distal end side toward a base end side is formed in the sliding guide portion, and in the exhaust flow passage portion, an outer surface of the closing portion is formed with a convex arcuate surface 16a, and the exhaust flow passage portion is fixed to the main body in a state in which the convex arcuate surface has been pushed in along the concave arcuate portion of the sliding guide portion.
An exhaust port member 7 comprises an inflow port 811 into which combustion exhaust gas flows, an exhaust port 77 through which the combustion exhaust gas is discharged to the outside, an exhaust passage P through which the combustion exhaust gas flows from the inflow port 811 toward the exhaust port 77, and a space portion 9 which is adjacent to a downstream end exhaust passage portion Pz located on a downstream end of the exhaust passage P, with a separating wall 781 defining the downstream end exhaust passage portion Pz interposed therebetween, wherein: the space portion 9 has an upstream side opening portion 90 on an upstream side thereof; the combustion exhaust gas flowing through the exhaust passage P flows from the upstream side opening portion 90 into the space portion 9; and the space portion 9 is closed other than at the upstream side opening portion 90.
Provided is an exhaust adapter with which it is possible to remove a front cover of a combustion device without removing the exhaust adapter even if the exhaust adapter is attached to the combustion device. An exhaust adapter 1 comprises: a box-like main body 2 which comprises a side wall 6 and an upper wall 7 and which is open downward; an exhaust outlet 11 which opens in the side wall 6 of the main body 2 and which discharges combustion exhaust; an exhaust coupling portion 4 which is provided inside the main body 2 and which is connected to an exhaust pipe 40 of a combustion device 30; an exhaust flow passage portion 5 which is provided inside the main body 2 and which is connected from the exhaust coupling portion 4 to the exhaust outlet 11; a cut-out portion 20 provided over a prescribed height and a prescribed width from a lower edge of the side wall 6 of the main body 2, in the side wall 6 on a front side on which a front cover 34 of the combustion device 30 is located; and a front lid 8 that covers the cut-out portion 20 in an openable and closable manner.
promoting public awareness of tankless water heater technology; promoting the goods and services of others in the fields of water heaters and of water heater sales, installation and service water heaters; tankless water heaters
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
(1) Electric control devices for heating and energy management.
(2) Heating systems for buildings comprising a hydronic heat transfer coil, a pump for circulating heated fluid from a source of heated fluid through the hydronic heat transfer coil, and an electronic controller that controls the pump, the source of heated fluid, and a blower that circulates air across the hydronic heat transfer coil; fluid circulation pumps; hydronic heat transfer coils; plumbing fittings, namely, valves.
A heated cooking device (HC) comprises a burner (3) in which a plurality of flame holes (32) are provided in a tubular burner main body (31), spaced apart in a longitudinal direction of the burner main body, an infrared radiating member (4) which is disposed facing the burner main body, spaced apart therefrom in a direction of gas ejection from the flame holes, is elongated in the longitudinal direction of the burner main body, and radiates infrared radiation by being heated, and a thermocouple (6) for detecting a flame generated when a fuel gas is supplied to the burner and the fuel gas ejected from the flame holes is burnt, thereby making it possible for a hydrogen flame to be reliably detected, without compromising yield strength, even if the burner uses hydrogen gas as the fuel gas and the hydrogen gas ejected from the flame holes is subjected to diffusion combustion. The thermocouple is disposed such that a temperature measuring contact point portion (61) thereof is located on a plane obtained by projecting in the longitudinal direction of the burner main body a shortest line (SI) joining a peripheral edge of the flame holes and one edge, in a width direction, of the infrared radiation radiating member.
F23N 5/10 - Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
F23D 14/10 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
A heating cooker according to the present invention is configured such that it is possible to quickly recognize the presence of a hydrogen flame from the beginning of combustion without a reduction in how much heat is produced. The present invention comprises a burner (3) that is formed by providing a plurality of burner ports (32) in a tubular burner body (31) at intervals in the long direction of the burner body. Hydrogen is supplied to the burner, and hydrogen emitted from the burner ports is combusted. The present invention also comprises an infrared radiation member (4) that is opposite the burner body at an interval in the direction in which hydrogen is emitted from the burner ports, is long in the long direction of the burner body, and radiates infrared light when heated. A flame color reaction agent (Fc) is applied to at least one of the surface of the burner body where the flame ports are provided and the surface of the infrared radiation member at both ends in the width direction.
F23D 14/10 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
A combustion device 1 includes an exhaust port member 5, wherein: an upper inner wall surface 55a of an upper wall portion 55 of the exhaust port member 5 includes a first upper inner wall surface portion 55b extending from a front end opening portion 71 to a predetermined position located rearward of the front end opening portion 71, an upper projecting wall surface portion 55c which extends over the entirety of an exhaust gas passage in a left-right direction, and which projects from a rear end of the first upper inner wall surface portion 55b toward the inside of the exhaust gas passage, and a second upper inner wall surface portion 55d extending from an inward end of the upper projecting wall surface portion 55c toward a rear end opening portion 72; and the second upper inner wall surface portion 55d is inclined upward toward the front end opening portion 71.
F24H 1/14 - Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
This premixing apparatus mixes a fuel gas into air and supplies the air-fuel mixture to a burner (1) via a fan (5). The downstream end of a gas supply channel (7) is connected to a gas suction unit (61) provided in an air supply channel (6) on the upstream side of the fan (5). A butterfly valve (8) that freely rotates into at least two attitudes, which are an open attitude and a closed attitude, is provided in a portion of the air supply channel (6) upstream from the gas suction unit (61). The premixing apparatus can prevent, over an extended period of time, the inability to maintain a required amount of air when the butterfly valve (8) has been set in the closed attitude. A ventilation opening (82) is formed in the butterfly valve (8), said ventilation opening (82) being such that air flows therethrough from the upstream side to the downstream side of the butterfly valve (8) while the butterfly valve (8) is in the closed attitude. The size of the butterfly valve (8) is set such that, in the closed attitude, the gap between the outer peripheral edge (8b) of the butterfly valve (8) and the peripheral wall surface (6a) of the air supply channel (6) is substantially blocked so as to cause air to flow only through the ventilation opening (82).
An exhaust port member 5 protrudes forward through an exhaust port member insertion port 104 opened in a front cover 102, from the inside of an exterior case 100 which stores a combustion device body 1. The exhaust port member 5 has a protruding part 51a that protrudes forward. The protruding part 51a has a drooping section 80 that extends downward from a protruding part lower surface 561b, and a recessed groove section 82 recessed upward between the drooping section 80 and the front cover 102.
In a gas governor, an auxiliary chamber divided by a separating wall from a main chamber that is a portion of the secondary pressure chamber is provided in the secondary pressure chamber, the auxiliary chamber communicates with the main chamber through a communicating passage, the separating wall is positioned at a portion away in a circumferential direction from an outflow-port opened portion that is a peripheral wall portion of the secondary pressure chamber, in which the outflow port is opened, and the separating wall is provided so that a distance from a valve hole and a curvature in the circumferential direction of at least an end portion of the separating wall, which is close to the valve seat, are equal to those of an end portion of the outflow-port opened portion, which is close to the valve seat.
In a combustion apparatus that includes a burner constituted by a burner body, an inside of which an air-fuel mixture is supplied to and one surface of which is made into an open surface, and a combustion plate covering the open surface of the burner body, and a combustion box enclosing a combustion space of the air-fuel mixture ejecting from the combustion plate, an offset part that is positioned at a portion which is away from the swelling part in an inflow direction of the air-fuel mixture to the inner chamber and does not oppose to a tip part(s) of the ignition electrode(s) through the combustion plate is provided with the opposite wall of the burner body and the offset part offsets to a combustion-plate side so that a distance between the offset part and the combustion plate becomes shorter than that between the combustion plate and a general part of the opposite wall except the swelling part and the offset part.
In a combustion apparatus that includes a combustion plate having a burner frame with a shape of a picture frame, which covers an open surface of a burner body, and a frame flange part outwardly extending from a side plate part, which is sandwiched between a body flange part of the burner body and a box flange part of a combustion box, which is fastened to the body flange part, a projecting part(s) positioning the burner frame with respect to the combustion box, which comes into contact with, or comes close to and is disposed opposite to an inner surface of the combustion box is provided with the side plate part of the burner frame. Preferably, the projecting part(s) is provided at a portion away from an end of a side of an opening peripheral edge part of the side plate part to a side of the frame flange part.
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Industrial laundry washing machines; food mixing machines
for commercial use; dishwashers for industrial purposes;
laundry washing machines for household purposes; dishwashers
for household purposes; electric wax-polishing machines for
household purposes; vacuum cleaners for household purposes;
electric food blenders for household purposes; mills for
household purposes, other than hand-operated; knives,
electric; whisks, electric, for household purposes; fruit
presses, electric, for household purposes; mixers, electric,
for household purposes; kitchen grinders, electric; crushers
for kitchen use, electric; kitchen machines, electric; tin
openers, electric; electric wax-polishing machines for
industrial purposes; vacuum cleaners for industrial
purposes. Gas water heaters for industrial purposes; boilers, other
than parts of non-electric prime movers or engines;
hot-water space heating apparatus for industrial purposes;
air conditioners for industrial purposes; gas ranges for
industrial purposes; electromagnetic induction cookers for
industrial purposes; cooking apparatus and installations for
commercial use; industrial rice cookers; roasters for
industrial purposes; industrial dish drying machines; dish
disinfectant apparatus for industrial purposes; kitchen
sinks incorporating integrated worktops for commercial use;
kitchen sinks for commercial use; electromagnetic induction
cookers for household purposes; electric water heaters for
household purposes; electric radiant heaters for household
purposes; gas water heaters for household purposes; gas
water heaters; gas ranges for household purposes; gas
cooking ovens for household purposes; gas rice cookers for
household purposes; gas grills for household purposes;
kitchen sinks incorporating integrated worktops for
household purposes; kitchen sinks for household purposes;
gas clothes drying machines for household purposes; gas
hot-water type bathroom heater and dryer for household
purposes; gas stoves; oil stoves; coal stoves; hot water
heating installations for household purposes; water heaters;
hot water heating installations; bathroom heaters; solar
water heaters; bubble generators for baths; microbubble
generators for baths. Non-electric coffee makers; cooking utensils, non-electric;
non-electric kettles; cookware and tableware, except forks,
knives and spoons; plates; non-electric griddles; grills in
the nature of cooking utensils; food preserving jars of
glass; plastic containers for kitchen use; ceramic pots;
cooking pots and pans, non-electric; oven mitts; trivets;
hand-operated cleaning instruments; dishcloths; yukakibo
(japanese bath utensils for hot bathtub water); bathroom
pails; cinder sifters for household purposes; gotoku
(trivets for japanese charcoal heaters for household
purposes); coal scuttles.
A fine bubble generating nozzle may include a nozzle unit and a baffle. The nozzle unit may include: an inlet; a pressure decreasing portion configured to decrease a pressure of a gas-dissolved pressurized water introduced from the inlet; a first collision chamber disposed downstream of the pressure decreasing portion and including a first collision wall with which the gas-dissolved pressurized water introduced from the pressure decreasing portion collides so that a flow direction of the gas-dissolved pressurized water changes; a second collision chamber disposed downstream of the first collision chamber and including a second collision wall with which the gas-dissolved pressurized water having flowed through the first collision chamber collides so that the flow direction of the gas-dissolved pressurized water changes; and an outlet. The baffle may be disposed outside of the nozzle unit and is disposed at a position facing the outlet.
B01F 23/232 - Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
B01F 23/2373 - Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media for obtaining fine bubbles, i.e. bubbles with a size below 100 µm
B01F 25/421 - Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM (Japan)
Inventor
Ono Takahiro
Asahara Makoto
Miyasaka Takeshi
Asato Katsuo
Abstract
Provided is a totally aerated combustion burner provided with: a burner body 1 having a mixture chamber 11 to which a mixture of a combustion gas and a primary air is supplied; and a burner plate part 2 that covers an open surface 12 of the burner body facing the mixture chamber, wherein a backfire suppression plate part 3 is disposed so as to face the burner plate part across a gap in the mixture chamber and the mixture after passing through the backfire suppression plate part is ejected from the burner plate part and is then burned. This totally aerated combustion burner is configured such that even when the combustion gas is hydrogen gas, backfire can be suppressed as much as possible while suppressing the pressure loss. The backfire suppression plate part has a sintered body sheet 33 obtained by sintering a laminate formed by laminating metal fibers or metal beads.
NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM (Japan)
Inventor
Ono Takahiro
Asahara Makoto
Miyasaka Takeshi
Asato Katsuo
Abstract
The present invention comprises: a burner body (1) that has a gaseous mixture chamber (11), in which hydrogen gas serves as a fuel gas and which is supplied with a gaseous mixture of the hydrogen gas and primary air; and a combustion plate part (2) that covers an open surface (12) of the burner body facing the gaseous mixture chamber, the present invention being configured such that backfiring can be effectively inhibited in a hydrogen combustion burner where the gaseous mixture is ejected from the combustion plate part and combusted. Used as the combustion plate part is a part having a sintered body sheet obtained by sintering a layered laminate without weaving or knitting metal fibers.
09 - Scientific and electric apparatus and instruments
11 - Environmental control apparatus
Goods & Services
fluid circulation pumps electric control devices for heating and energy management heating systems for buildings comprising a hydronic heat transfer coil, a pump for circulating heated fluid from a source of heated fluid through the hydronic heat transfer coil, and an electronic controller that controls the pump, the source of heated fluid, and a blower that circulates air across the hydronic heat transfer coil; hydronic heat transfer coils as part of heating or cooling installations; plumbing fittings, namely, valves
21 - HouseHold or kitchen utensils, containers and materials; glassware; porcelain; earthenware
Goods & Services
Dishwashers for industrial purposes; dishwashers for household purposes Gas water heaters for industrial purposes; gas heating boilers; gas furnace boilers; gas hot water boilers; industrial boilers, other than parts of non-electric prime movers or engines; hot-water space heating apparatus for industrial purposes; air conditioners for industrial purposes; gas ranges for industrial purposes; electromagnetic induction cookers for industrial purposes; cooking apparatus and installations for commercial use, namely, cooktops; industrial rice cookers; gas roasters for industrial purposes; industrial dish drying machines; dish disinfectant apparatus for industrial purposes; kitchen sinks incorporating integrated worktops for commercial use; kitchen sinks for commercial use; electromagnetic induction cookers for household purposes; electric water heaters for household purposes; gas water heaters for household purposes; gas water heaters; gas ranges for household purposes; gas cooking ovens for household purposes; gas rice cookers for household purposes; gas grills for household purposes; kitchen sinks incorporating integrated worktops for household purposes; kitchen sinks for household purposes; gas clothes drying machines for household purposes; gas hot-water type bathroom heater and dryer for household purposes; gas hot-water type heat generator for use in heating and drying bathroom for household purposes; gas hot-water type bathroom heater and air dryer for household purposes; gas hot-water type bathroom heater and dehumidifier for household purposes; gas stoves; hot water heating installations for household purposes; water heaters; hot water heating installations; bathroom heaters; solar water heaters; bubble generators for baths, namely, bath tub jets, water jets for use in bathtubs and showers for use in generating bubbles in water; microbubble generators for baths Non-electric coffee makers; non-electric kettles; cookware, namely, roasting pans; plates; non-electric griddles; grills in the nature of cooking utensils; food preserving jars of glass; plastic household containers for food; ceramic pots; non-electric cooking pots; non-electric cooking pans; oven mitts; trivets; Gotoku (trivets for Japanese charcoal heaters for household purposes)
Not only a cylindrical weight is inserted with a clearance around an outside of a first axis part or a second axis part that extends opposite to the first axis part and is movable freely in an axial direction but also an annular seat surface on which the cylindrical weight is able to be seated by self-weight is provided with a governor valve. A projecting part(s) is provided with only a part in circumferential direction of one of the annular seat surface and a lower end surface of the cylindrical weight. The cylindrical weight is made sure to be supported on the annular seat surface in an inclined state from an upright posture by contact of the projecting part(s) with the other of the annular seat surface and the lower end surface of the cylindrical weight.
The present invention provides a water heating device capable of shortening a flow passage that mixes hot water and cold water and saving space in the device. In a flow path cross section of circular orthogonal to the central axis of the flow path, the flow inlet has an outer wall extending from the inner peripheral surface of the flow path in a direction of a tangent of the inner peripheral surface, and the central axis of the flow inlet is disposed closer to the inner peripheral surface of the flow path connected to the outer wall with respect to the central axis of the flow path.
A microscopic bubble generation device disclosed in the present specification is provided with: a body case which has an inlet part and an outlet part; and a first microscopic bubble generation unit which is housed in the body case and disposed between the inlet part and the outlet part. The microscopic bubble generation unit is provided with one or more Venturi flow channels. The one or more Venturi flow channels are each provided with: a reducing-diameter flow channel in which the channel diameter becomes increasingly smaller toward the downstream side; and an enlarging-diameter flow channel which is provided downstream of the reducing-diameter flow channel and in which the channel diameter becomes increasingly larger toward the downstream side. At least one of the one or more Venturi flow channels has formed therein a slit that caves in from the internal surface of the Venturi flow channel toward the radially outer side. The slit is continuously formed from a first end portion that coincides with the downstream end of the enlarging-diameter flow channel to a second end portion that is situated on the upstream side of said downstream end.
A47L 15/42 - Washing or rinsing machines for crockery or table-ware Details
B01F 23/2375 - Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media for obtaining fine bubbles, i.e. bubbles with a size below 100 µm for obtaining bubbles with a size below 1 µm
B01F 25/10 - Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
B01F 25/45 - Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
87.
FINE BUBBLE GENERATION DEVICE, WATER HEATER, AND DISHWASHER
This fine bubble generation device comprises: a body case having an inflow section and an outflow section; and a first fine bubble generation unit accommodated in the body case. The first fine bubble generation unit comprises: a trunk section; a Venturi flow path that connects to the inside of the trunk section; an upstream fitting section that is connected to the trunk section and substantially fits to the inside surface of the body case; and a downstream fitting section that is connected to the trunk section further downstream than the upstream fitting section, and that substantially fits to the inside surface of the body case. The inside of the body case is provided with a liquid draining flow path that is located between the inner surface of the body case and the outer surface of the trunk section, and that connects the gap space formed between the upstream fitting section and the downstream fitting section to the outflow section.
A47L 15/42 - Washing or rinsing machines for crockery or table-ware Details
B01F 23/2375 - Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media for obtaining fine bubbles, i.e. bubbles with a size below 100 µm for obtaining bubbles with a size below 1 µm
B01F 25/10 - Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
B01F 25/45 - Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
In a premixing apparatus that mixes a fuel gas with air and supplies an air-fuel mixture to a burner through a fan, includes a main valve, a zero governor, and a variable throttle valve which are interposed from an upstream side downward in sequence in a gas supply passage, of which an downstream end is connected to a gas suction part that is provided in an air supply passage on an upstream side of a fan, and carries out a first control that regulates an opening degree of the variable throttle valve so that an excess air ratio of the air-fuel mixture, which is indexed based on a flame current that is detected by a flame rod which is exposed in flames of the burner, and a second control that, at time of a post-purge operation, if the flame rod detects the flame current, it will be decided that an open trouble of the main valve occurs and the opening degree of the throttle valve will be tightened till a minimum opening-degree which is set so that the burner is extinguished.
F23D 14/02 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
C10K 3/06 - Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide by mixing with gases
C10L 3/00 - Gaseous fuelsNatural gasSynthetic natural gas obtained by processes not covered by subclasses , Liquefied petroleum gas
Provided is a water heater with which it is possible to suppress any sharp rise in the manufacturing cost of a configuration in which a microbubble generator is accommodated within a casing. This water heater 1 comprises a casing 8, combustion devices 31, 32, heat exchangers 41A-42B, a water supply pipe P1, a hot-water supply pipe P2, a water supply connection member 10, a hot-water supply connection member 20, and a water quantity control unit 50. The water heater 1 furthermore comprises a microbubble generator 9 that is connected to one specific pipe P2 among the water supply pipe P1 and the hot-water supply pipe P2 within the casing 8, the microbubble generator 9 being formed in a substantially cylindrical shape for which the length in a center-axis X9 direction is greater than the exterior width and generating microbubbles in hot water flowing through the interior. The microbubble generator 9 has: an inflow opening 91H positioned on one side in the center-axis X9 direction, the inflow opening 91H being such that hot water flows in from the upstream side P2U of the specific pipe P2; and an outflow opening 92H positioned on the other side in the center-axis X9 direction, the outflow opening 92H causing hot water including microbubbles to flow out to the downstream side P2D of the specific pipe P2. The microbubble generator 9 is positioned lower than flame openings 31F, 32F of burners 31B, 32B.
This fine bubble generation device comprises an inflow part, an outflow part, a first fine bubble generation part provided between the inflow part and the outflow part, and a second fine bubble generation part provided between the first fine bubble generation part and the outflow part. The first fine bubble generation part is provided with a Venturi part including a reduced-diameter flow path where the flow path diameter decreases from the upstream toward the downstream, and an expanded-diameter flow path where the flow path diameter expands from the upstream toward the downstream. The second fine bubble generation part is provided with a plurality of swirling-flow generation parts disposed so as to be aligned in the downstream-side center axial direction of the second fine bubble generation part. Each of the plurality of swirling-flow generation parts includes: a shaft part that extends in the downstream-side center axial direction; an outer circumferential part surrounding the shaft part; and a plurality of blade parts that are provided between the shaft part and the outer circumferential part and generate a swirling flow flowing in a prescribed swirling direction with respect to the shaft part.
In a premixing apparatus that mixes a fuel gas with air, supplies an air-fuel mixture to a burner through a fan, and carries out a control that regulates an opening degree of a variable throttle valve, which is interposed in a gas supply passage, so that an excess air ratio of an air-fuel mixture becomes an appropriate value, in a case where a detected excess air ratio deviates to one side, e.g., a large side, from an acceptable range, a motor is repeatedly caused to rotate by a unit-angle in an opening-degree increasing direction until the detected excess air ratio becomes an appropriate value. In a case where the detected air ratio deviates to the other side, e.g., a small side, from the acceptable range, the motor is caused to rotate, at a high speed in an opening-degree decreasing direction, till a first position that is anticipated that the excess air ratio will become a value that deviates by a fixed quantity from the acceptable range to a large side, thereafter, the motor is caused to rotate, at the high speed in an opening-degree increasing direction, till a second position that is a short of a target position, and subsequently, the motor is caused to rotate by the unit-angle in the opening-increasing direction.
F23D 14/04 - Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
F23D 14/60 - Devices for simultaneous control of gas and combustion air
In a fan apparatus that includes a passage, a switching device, and a control device, on a premise that at a state where an effective sectional area at a predetermined portion of the passage is switched to a predetermined first-area by the switching device, a value of a current flowing to the fan when a rotational speed of the fan is made to a predetermined rotational speed is defined as a first fan-current value, at a state where the effective sectional area at the predetermined portion of the passage is switched to a predetermined second-area which is larger than that of the first area by the switching device, the value of the current flowing to the fan when the rotational speed of the fan is made to the predetermined rotational speed is defined as a second fan-current value, and a ratio of the first fan-current value to the second fan-current value is defined as a detected current ratio, a control device is configured to: memorize as a standard current ratio a detected current ratio that is detected when the fan apparatus is set up; and decide a clogging degree of the passage by comparison of a detected current ratio after detection of the standard current ratio with the standard current ratio.
A hybrid water heater incudes a storage tank, a first temperature sensor, a tankless heater fluidly coupled to the storage tank, and a controller configured to determine a target output temperature range for the tankless heater based on a temperature setpoint, measure a temperature of hot water stored in an upper portion of the storage tank using the first temperature sensor, determine whether the measured temperature of the hot water is less than a first minimum temperature setpoint, generate an adjusted target output temperature range for the tankless heater based on a determination that the measured temperature is less than the first minimum temperature by increasing a value of both the lower threshold and the upper threshold, and control the tankless heater to produce the heated water according to the adjusted target output temperature range.
F24H 15/175 - Supplying heated water with desired temperature or desired range of temperature where the difference between the measured temperature and a set temperature is kept under a predetermined value
F24H 1/12 - Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
F24H 15/223 - Temperature of the water in the water storage tank
F24H 15/335 - Control of pumps, e.g. on-off control
A thermal insulation material is arranged on an inner surface of a swelling part formed at a side plate part and outwardly swelling in an X-axis direction so as to be sandwiched from both sides in a Z-axis direction by a step outwardly bent in the X-axis direction and positioned an end, in a Z-axis plus direction, of the swelling part and by a structural member of a burner protruding inwardly in the X-axis direction from an end, in the Z-axis minus direction, of the side plate part. A vicinity portion of an end, in the Z-axis plus direction, of the thermal insulation material is held from an inside in the X-axis direction by a side edge portion, on each side in the X-axis direction, of the fins.
F24H 1/00 - Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
F24H 1/14 - Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
F24H 1/40 - Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
A hot water circulation system comprises a water heater having a cold-water inlet and a hot water outlet. A water pump circulates water through the water heater to produce hot water. The hot water is circulated to a thermal bypass valve, which is configured to close when hot water contacts a heat activated seal. A bypass circuit is coupled between the hot water outlet and the cold water inlet of the water heater. The bypass circuit prevents hot water from circulating from the hot water outlet to the cold-water inlet when the thermal bypass valve is open and promotes circulating hot water from the hot water outlet to the cold water inlet when the thermal bypass valve is closed. Upon a temperature sensor sensing hot water entering the cold-water inlet, the water heater turns of the water pump.
A rich-lean flame burner having on an upper part thereof: a longitudinally elongated lean burner port; and a rich burner port lying adjacent to at least one lateral side of the lean burner port with a clearance therebetween. At a plurality of longitudinal points of straightening members having a plurality of straightening plates which divide the lean burner port into a plurality of laterally sectioned regions, there are disposed first constricted portions which bring upper parts of the straightening plates into intimate contact with each other. Second constricted portions are disposed in at least laterally outermost straightening plates to further divide each portion of the lean burner port that has been divided by the first constricted portions. The second constricted portions are such that the lower end thereof is positioned above the lower end of the first constricted portions, and that the vertical length is shorter than the first constricted portions.
A combustion device may include a casing including a bottom plate, a combustion unit housed in the casing, and a fan housed in the casing and configured to take in air inside the casing and supply the air to the combustion unit. The bottom plate may be provided with a flat portion and a recess recessed downward from the flat portion. The recess may be provided with a drainage hole and an eave arranged above the drainage hole. The drainage hole may be located below an upper surface of the flat portion. The eave may be at least partially located below the upper surface of the flat portion.
embedded software for monitoring and controlling water recirculation sold as a component of water heaters; embedded software for monitoring and controlling water recirculation sold as a component of tankless water heaters; embedded software for monitoring and controlling water recirculation sold as a component of tankless water heaters with attached storage; embedded software for monitoring and controlling water recirculation sold as a component of hybrid tank tankless water heaters
Parts of water heaters, sold as an integral component of water heaters, namely, wireless equipment in the nature of transceivers for connecting smart devices and water heaters to enable water heater set-up and installation
