A temperature control system and method for temperature control, wherein use is made of indoor and outdoor temperature historical data to generate a heat profile for estimation of a feature heat quantity/temperature in one or more rooms, and for an ensuing control of at least two temperature control units based on the heat profile.
The present invention relates to a system for temperature control in one or more rooms, as well as a method for temperature control in one or more rooms.
Provided is a refrigeration cycle device (1) comprising a refrigerant circuit (10) and a control unit (4). The refrigerant circuit (10) is connected to a compressor (11), a first heat exchanger (13), a first expansion mechanism (14), and a second heat exchanger (15). The refrigerant circuit (10) circulates a refrigerant including R290. The control unit 4 performs first control for reducing the amount of fluid that exchanges heat with the refrigerant in at least one of the first heat exchanger (13) and the second heat exchanger (15) when the height differential pressure of the compressor (11) is not sufficient.
Provided is a temperature control system with which, even when a large amount of refrigerant is mixed in water piping, the refrigerant can be discharged before flowing into a living space. A temperature control system (1) comprises a first unit (100) and a second unit (200). The first unit has a refrigerant circuit (110), first water piping (310a), a second heat exchanger (150), and a first deaeration device (170). A highly flammable refrigerant circulates through the refrigerant circuit. The first water piping is part of water piping. The second heat exchanger exchanges heat between the water flowing in the first water piping and the refrigerant. The first deaeration device discharges gas from the first water piping. The second unit has second water piping (310b) and a second deaeration device (210). The second water piping is part of the water piping, the water flowing out from the first water piping flows into the second water piping, and refrigerant flowing out flows into the living space (400). The second deaeration device discharges gas from the second water piping. The gas-liquid separation performance with which the first deaeration device separates the gas from the water flowing through the water piping is higher than the gas-liquid separation performance with which the second deaeration device separates the gas from the water flowing through the water piping.
A refrigeration cycle device (1) is provided with a refrigerant circuit (10) and a control unit (4). In the refrigerant circuit (10), the following are connected: a compressor (11); a first heat exchanger (13); a first expansion mechanism (14); and a second heat exchanger (15). In the refrigerant circuit (10), a refrigerant including R290 circulates. The control unit 4 performs first control in which when a condition is reached where the low-point/high-point pressure differential of the compressor (11) is insufficient, the amount of a fluid that exchanges heat with the refrigerant is reduced, in at least one of the first heat exchanger (13) and the second heat exchanger (15).
A refrigeration cycle device (1) comprises a refrigerant circuit (10) and a control unit (4). The refrigerant circuit (10) has a first heat exchanger (13). The first heat exchanger (13) performs heat exchange between outdoor air and a refrigerant. The refrigerant circulates in the refrigerant circuit (10). The control unit (4) performs: defrosting operation to melt frost attached to the first heat exchanger; and capacity reduction operation to reduce capacity. The control unit (4) performs the capacity reduction operation in the case where an index regarding frost formation satisfies a second condition, and performs the defrosting operation in the case where the index regarding frost formation satisfies a first condition during the capacity reduction operation.
The present invention makes it possible to suppress discharge and combustion of a flammable first refrigerant in an undesirable location when the pressure of the first refrigerant in a first circuit has become high due to an external factor or the like in a refrigeration cycle device that employs a highly flammable refrigerant. A refrigeration cycle device (1) comprises a first circuit (100) and a second circuit (200). The first circuit (100) circulates a first medium, which is a highly flammable refrigerant. The second circuit (200) circulates a second medium, which exchanges heat with the first medium. The first circuit (100) has a first heat exchanger, which exchanges heat with air. Among components that form the first circuit (100), a first heat exchanger (120) has a lower pressure capacity than the others.
In relation to refrigeration cycle devices that employ highly flammable refrigerants, the present invention makes it possible to suppress discharge and combustion of a flammable refrigerant in an undesirable location when the pressure of the refrigerant in a refrigerant circuit has become high due to an external factor or the like. A refrigeration cycle device (1) comprises a refrigerant circuit (100) and a protection unit (500). A highly flammable refrigerant circulates through the refrigerant circuit (100). The protection unit (500) is disposed in the refrigerant circuit (100). The protection unit (500) discharges the refrigerant to the outside of the refrigerant circuit either before the refrigerant pressure reaches a pressure corresponding to the spontaneous ignition temperature of the refrigerant or before the refrigerant temperature reaches the spontaneous ignition temperature of the refrigerant.
The present invention concerns a heat pump system and method of controlling said system which does not require the complete shutdown of said system should refrigerant be detected inside the heat medium circuit. In particular, the invention relates to the identification and operation of the system within a safety threshold for heat medium flow, which safety threshold is commensurate with the capability of the system to cope with the leaked refrigerant.
The present invention relates to an air conditioner (1), in particular an indoor unit, having a fan (3) inside and being configured to blow, from an outlet (14), air sucked by the fan from an inlet (13), the air conditioner includes: a first horizontal flap (6) having a first surface (6A) and a second surface (6B) that guide the blowout air, which is provided rotatably at the outlet (14), a second horizontal flap (7) placed above the first horizontal flap (6) and on the downstream side of the airflow in an installation situation of the air conditioner (1), and an auxiliary flap (8) provided on the first surface (6A) of the first horizontal flap (6), wherein the auxiliary flap (8) has a third surface (8A) facing the first surface (6A), the third surface (8A) of the auxiliary flap (8) having a shape that at least partially approximates a first arc, so that the blowout air flowing along the third surface (8A) is guided towards the lower surface (7A) of the second horizontal flap (7) facing the first surface (6A) of the first horizontal flap (6).
There are times when water is not discharged depending on the outdoor temperature conditions when a water-draining means of a heat exchanger is manually opened when there is a risk of freezing. This temperature control system (1) sends temperature-adjusted water to a first water pipe (201), which is a water pipe on the use side. The temperature control system (1) is provided with a first unit (400). The first unit (400) has: a refrigerant circuit (100) through which a highly flammable refrigerant circulates; a second water pipe (202); and a first heat exchanger (120). The second water pipe (202) is a water pipe on the heat source side connected to the first water pipe (201). The first heat exchanger (120) exchanges heat between water and the refrigerant. The first unit (400) also has an automatic on-off valve (230) that automatically discharges the water in the first heat exchanger (120) at low temperatures.
Provided is a refrigeration cycle device capable of, when a refrigerant leaks from a refrigerant circuit, preventing a detection unit for detecting the leakage of the refrigerant from the refrigerant circuit from becoming an ignition source for the refrigerant. A refrigeration cycle device (1) is provided with a compressor (110), a refrigerant circuit (100), a pressure sensor (160), and a control unit (300). The compressor has a suction part. The refrigerant circuit includes the compressor and is filled with a highly flammable refrigerant. The pressure sensor is provided to the suction part, detects the pressure of the refrigerant passing through the suction part, and outputs the detection result as an output signal. The control unit detects leakage of the refrigerant from the refrigerant circuit on the basis of the output signal.
The present disclosure relates to an indoor unit and a heat pump. An indoor unit for a heat pump installed inside of a building, comprising a part of a heat medium circuit for circulating a heat medium, an intermediate heat exchanger to exchange heat between a refrigerant and the heat medium, a gas-liquid separator provided in the heat medium circuit, the gas-liquid separator comprising a gas purge valve to release refrigerant, a container accommodating the intermediate heat exchanger, the gas purge valve, and the gas-liquid separator, and a first duct provided at the container, the first duct communicating an inside of the container with an outdoor space for air exchange between the inside of the container and the outdoor space, wherein the outdoor space is outside of the building.
The present disclosure relates to a heat pump. The heat pump (1), comprises a refrigerant circuit (10) for circulating a refrigerant comprising a compressor (11), a heat source heat exchanger (12), an expansion valve (13), and an intermediate heat exchanger (20), a heat medium circuit (30) for circulating a heat medium comprising a pump (36) and the intermediate heat exchanger (20), an outdoor unit (100) comprising an outdoor unit casing (101) housing at least the heat source heat exchanger (12), the compressor (11), and the expansion valve (13), an indoor unit (300) comprising an indoor unit casing (301) housing at least the pump (36), and a heat exchanger unit (200) comprising a container (201) housing the intermediate heat exchanger (20). The heat source heat exchanger (12), the compressor (11), the expansion valve (13), and the intermediate heat exchanger (20) are connected with each other via a refrigerant piping (14), and the intermediate heat exchanger (20) and the pump (36) are connected with each other via a heat medium piping (37). The container (201) of the heat exchanger unit (200) is separate from the indoor unit casing (301) and the outdoor unit casing (101) and located outside of the indoor unit casing (301) and the outdoor unit casing (101).
F24F 1/0003 - Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
F24D 11/02 - Central heating systems using heat accumulated in storage masses using heat pumps
F24F 11/36 - Responding to malfunctions or emergencies to leakage of heat-exchange fluid
The present invention relates to an air conditioner which controls operation by adjusting or changing a set indoor temperature of the air conditioner in accordance with a thermal insulation performance of the building in which the air conditioner is installed and an outdoor air temperature, wherein an amount of adjusting or changing the set indoor temperature is set to be different within a pre-set temperature range around 0° C. outdoor air temperature than outside the pre-set temperature range. The present invention further relates to a computer-implemented method of controlling an air conditioner and a controller of an air conditioner.
Provided is a refrigeration cycle device with which it is possible to both reduce a refrigerant filling amount and improve operation efficiency. A refrigeration cycle device that executes a warming operation and a cooling operation, the refrigeration cycle device comprising a compressor, a radiator, an internal heat exchanger, and an evaporator, the internal heat exchanger having a first heat transfer pipe through which refrigerant flows from the evaporator to the compressor and a second heat transfer pipe through which the refrigerant flows from the radiator to the evaporator, the internal heat exchanger performing heat exchange between the refrigerant passing through the first heat transfer pipe and the refrigerant passing through the second heat transfer pipe, and the refrigerant not flowing through the second heat transfer pipe during the cooling operation.
Provided is a heat pump unit in which an accumulator and a liquid-gas heat exchanger are arranged in a space-saving manner. Specifically provided is a heat pump unit 100, wherein a liquid-gas heat exchanger 21 and an accumulator 23 are arranged vertically such that the accumulator 23 is above the liquid-gas heat exchanger 21. Suction piping 92 emerging from a side of the liquid-gas heat exchanger 21 is guided to directly above the top part of the accumulator 23. Said arrangement saves space and facilitates the routing of the suction piping 92.
Provided is a refrigeration cycle device that makes it possible to accurately grasp the state of a refrigerant in an evaporator, even if the device comprises an internal heat exchanger. This refrigeration cycle device comprises: a refrigerant circuit having a compressor, a radiator, a pressure reduction means, an internal heat exchanger, and an evaporator; and a temperature detection unit that detects the temperature of the refrigerant. The refrigerant circuit is filled with a non-azeotropic refrigerant mixture. The internal heat exchanger causes heat exchange between refrigerant flowing from the evaporator to the compressor and refrigerant flowing from the radiator to the evaporator. The temperature detection unit detects the temperature of the refrigerant before flowing out of the evaporator and flowing into the internal heat exchanger.
Provided is an electrical component box which simultaneously achieves safety and cooling inside the electrical component box. An electrical component box 70 which is installed in a heat pump unit 100 and internally includes an electrical component is provided with an inner box 50 and an outer box 60. The inner box 50 stores a printed circuit board 43 mounting the electrical component and has a hermetic structure. The outer box 60 covers the inner box 50. In the electrical component box 70, inflow of a gas to the inside of the inner box 50 is suppressed and hence contact of air containing, for example, a contaminant or a flammable gas with an electrode of the electrical component is also suppressed.
This heat source equipment (2) comprises a refrigerant circuit (20), a refrigerant container (44), a connection part (43), a communication pipe (42), and a casing (41). The refrigerant circuit (20) includes a compressor (21) and a heat exchanger (23). The refrigerant container (44) is connected to the refrigerant circuit (20). The refrigerant container (44) is filled with flammable refrigerant. The connection part (43) is connected to the refrigerant container (44). The communication pipe (42) connects the connection part (43) and the refrigerant circuit (20). The casing (41) accommodates the compressor (21), the first heat exchanger (23), the refrigerant container (44), the connection part (43), and the communication pipe (42). The refrigerant container (44) is supported by a bottom plate (413) of the casing (41).
A heat source machine (2) comprises a refrigerant circuit (20), a refrigerant container (44), a connection part (43), a communication pipe (42), and a protection member (46). The refrigerant circuit (20) includes a compressor (21) and a heat exchanger (23). The refrigerant container (44) is connected to the refrigerant circuit (20). The refrigerant container (44) is filled with a combustible refrigerant. The connection part (43) is connected to the refrigerant container (44). The communication pipe (42) connects the connection part (43) and the refrigerant circuit (20). The protection member (46) protects the connection part (43).
A heat source device (2) is filled with a flammable refrigerant and comprises a heat exchanger (23). The heat source device (2) is provided with a plurality of heat transfer pipes (231), a fin (232), a connection portion (233), and a protection member (42). The plurality of heat transfer pipes (231) extend in a first direction. The fin (232) is joined to the heat transfer pipes (231). The connection portion (233) connects the heat transfer pipes (231) with one another on one end in the first direction. The protection member (42) protects the connection portion (233).
A refrigeration cycling device (1) has a refrigerant circuit (10) through which a refrigerant containing R290 circulates, the refrigeration cycling device comprising a compressor (11), a heat sink, an evaporator, an injection pipe (19), a second expansion mechanism (20), and an economizer heat exchanger (21). The compressor (11) suctions a low-pressure refrigerant from the refrigerant circuit (10), compresses the refrigerant, and discharges a high-pressure refrigerant. The heat sink dissipates heat from the high-pressure refrigerant. The evaporator evaporates the low-pressure refrigerant. The injection pipe (19) branches some of the refrigerant flowing from the heat sink to the evaporator and feeds the branched refrigerant to the compressor (11). The second expansion mechanism (20) decompresses the refrigerant passing through the injection pipe (19). The economizer heat exchanger (21) exchanges heat between the refrigerant decompressed by the second expansion mechanism (20) and the refrigerant flowing from the heat sink to the evaporator. The injection pipe (19) branches off from between the heat sink and the economizer heat exchanger (21).
A partition member (31) partitions the interior of a heat source unit (20) into a machine chamber (32) and a blower chamber (33). A compressor (24) is disposed in the machine chamber (32). A blower (22) and a heat exchanger (21) are disposed in the blower chamber (33). A detection sensor (40) that detects leakage of refrigerant is disposed inside the heat source unit (20). The partition member (31) is provided with an opening (35) via which the machine chamber (32) and the blower chamber (33) communicate.
The present disclosure relates to a heat source unit of a heat pump. The heat source unit (1) comprises a heat source unit casing (10) comprising a top plate (11) disposed on a top side of the heat source unit (1), a bottom plate (12) disposed on a bottom side of the heat source unit (1), and a front grille (13) that is disposed on a front side of the heat source unit (1) and in which air flow openings (131) are disposed. The heat source unit (1) further comprises a blower fan (14) that is housed in the heat source unit casing (10) and configured to generate an airflow through the air flow openings (131). The front grille (13) is disposed between the top plate (11) and the bottom plate (12), so as to transfer a force applied on the top plate (11) from the top plate (11) to the bottom plate (12).
Heat source unit (1) of an air heat pump, having a casing (10), a fan (22) accommodated in the casing (10) and being rotatable about a center axis (30), a bell mouth (32) having an opening (32), and a grille (40, 42) covering the opening (32). The grille (40, 42) comprises a plurality of longitudinal first louvers (46), wherein each of the first louvers (46) has an entry portion (66) facing the fan (22) and at least the entry portion (66) is inclined relative to the center axis (30) of the fan (22), wherein the angle of inclination (α) changes in the longitudinal direction of the respective first louver (46).
The present disclosure relates to a heat source unit (1) of a heat pump having a refrigerant circuit, the heat source unit (1) comprising: a fan (2) and a heat source unit casing (10), the heat source unit casing (10) comprising an air chamber (11) accommodating the fan (2), and a machine chamber (12) accommodating components of the refrigerant circuit of the heat pump. A top plate (13) is disposed on a top side of the heat source unit (1), a bottom plate (14) is disposed on a bottom side of the heat source unit (1), and a front grille (15) is disposed on a front side of the heat source unit (1) and extends over both the air chamber (11) and the machine chamber (12). The front grille (15) comprises an air chamber portion (151) covering at least a part of the air chamber (11) and a machine chamber portion (152) covering at least a part of the machine chamber (12), wherein the air chamber portion (151) and the machine chamber portion (152) are provided as two separate parts, separated along a direction from the top plate (13) toward the bottom plate (14), wherein the machine chamber portion (152) is detachably attached to the heat source unit casing (10) so as to be removable therefrom.
A computer-implemented method acquires a user consumption pattern of domestic hot water. The method includes acquiring data representing an amount of equivalent energy tapped from a heat storage tank within a first time period, generating a first history or data collection of data representing an amount of cumulative heat tapped from the heat storage tank over a number of first time periods, and acquiring a user consumption pattern of domestic hot water by applying a user-consumption-pattern-determination-algorithm to the generated first history or data collection of data representing amount of cumulative heat tapped from the heat storage tank. The heat storage tank is a pressurized tank. The user-consumption-pattern-determination-algorithm is a time-series-forecast-algorithm trained on history or data collection representing amount of cumulative heat tapped from the heat storage tank or equivalent heat storage tanks, and defining user consumption patterns in one or more machine-learning-algorithms.
It is impossible to detect a refrigerant leaking from a site other than a degassing valve in the machine chamber into a machine chamber. An outdoor unit (90) includes a refrigerant circuit, a water circuit, a refrigerant sensor (70), a gas-liquid separator (40), and a degassing valve (54). The refrigerant circuit connects, by means of a pipe, a compressor (12) and a second heat exchanger (20). The second heat exchanger (20) causes heat exchange between the refrigerant and water. The water circuit has a flow of water that exchanges heat with the refrigerant in the second heat exchanger (20). The refrigerant sensor (70) detects the refrigerant to find refrigerant leakage. The gas-liquid separator (40) is connected to the water circuit. The degassing valve (54) is attached to the gas-liquid separator (40). The degassing valve (54) degasses the gas-liquid separator (40). The machine chamber R2 accommodates the compressor (12) and the second heat exchanger (20). The machine chamber R2 accommodates the degassing port (54a) of the degassing valve (54) and the refrigerant sensor (70).
A sensor disposed in a lower portion of a case may get wet with water to have trouble. An outdoor unit (90) is an outdoor unit (90) of a heat pump cycle apparatus. The outdoor unit (90) includes a bottom frame (93), a plate-shaped member (94), a compressor (12), a first heat exchanger (16), a refrigerant circuit, and a refrigerant sensor (70). The plate-shaped member (94) is disposed above the bottom frame (93) to be spaced apart from the bottom frame (93). The compressor (12) is mounted on the plate-shaped member (94) to be supported by the bottom frame (93) with the plate-shaped member (94) being interposed therebetween. The compressor (12) compresses a refrigerant. The first heat exchanger (16) causes heat exchange between the refrigerant and air. The refrigerant circuit connects, by means of a pipe, the compressor (12) and the first heat exchanger (16). The refrigerant sensor (70) detects the refrigerant to find refrigerant leakage. The refrigerant sensor (70) is disposed on the plate-shaped member (94).
A system includes: a heat generator obtaining heat from a heat source and having a generator outlet port and a generator return port; a central heating circuit having a heating feed port and a heating return port; a tank having a top portion and a bottom portion, the tank containing a heat storing medium; a first tapping coil immersed in the heat storing medium in the bottom portion of the tank; and a second tapping coil immersed in the heat storing medium in the top portion of the tank The heat generator, second tapping coil, central heating circuit, and first tapping coil are fluidly connected in series to allow fluid to flow from the heat generator via at least one of the second tapping coil, the central heating circuit, and the first tapping coil back to the heat generator The system includes first, second and third three-way valves.
A system produces domestic hot water and includes a tank having top and bottom portions and containing heat storing fluid, and a tapping unit including first and second tapping coils. The first tapping coil is immersed in the bottom portion of the tank. The second tapping coil is fluidly connected in series to the first tapping coil by a connection pipe, and to the hot water port, and is immersed the top portion of the tank A switching device switches between a first state in which water flows from the cold water port through only first tapping coil to the hot water port, and a second state in which water flows from the cold water port through the first tapping coil and, after flowing through the first tapping coil, through to the second tapping coil to the hot water port.
A system produces domestic hot water and heat for central heating and includes: a heat generator for obtaining heat from a heat source, the heat generator having a generator outlet port and a generator return port; a central heating circuit having a heating feed port and a heating return port; and a tank having an inlet port, an upper port and a lower port, the tank containing a fluid which is a heat storing fluid, and the inlet port being configured to feed the heat storing fluid into the tank. The heat generator, the central heating circuit, and the tank are fluidly connected in series to allow the fluid to flow from the heat generator via at least one of the central heating circuit and the tank back to the heat generator The system further includes first, second and third three-way valves.
A method for manufacturing a refrigeration cycle apparatus (1) is a method for manufacturing a refrigeration cycle apparatus including a heat source unit (2), utilization units (3a and 3b), and connection pipe (4, 5). The connection pipe (4, 5) connect the heat source unit (2) and the utilization units (3a and 3b). A method for manufacturing a refrigeration cycle apparatus (101) includes a generating step (S40) and a sealing step (S50). The generating step (S40) connects the heat source unit (2) in which a refrigerant including R1234yf has been sealed to the connection pipe (4, 5) connected to the utilization units (3a and 3b) and generates a refrigerant circuit (10). The sealing step (S50) fills the refrigerant circuit (10) with R32 recovered and recycled from an existing facility and seals a mixed refrigerant including at least R32 and R1234yf.
F25B 45/00 - Arrangements for charging or discharging refrigerant
C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa
F25B 43/00 - Arrangements for separating or purifying gases or liquidsArrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
F25B 43/02 - Arrangements for separating or purifying gases or liquidsArrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
An air-conditioning system includes: a compressor unit including a housing accommodating a refrigerant compressor; a high-pressure gas refrigerant pipe connected to a discharge side of the refrigerant compressor; a low-pressure gas refrigerant pipe connected to a suction side of the refrigerant compressor; and air-conditioners. The air-conditioners each include: a return-air inlet and a supply-air outlet each communicating with a predetermined space that is to be air-conditioned; a first heat exchanger configured to cause heat-exchange between refrigerant flowing in the first heat exchanger and air passing through the first heat exchanger; an exhaust-air outlet and an outside-air inlet each communicating with an outside of the predetermined space; and a second heat exchanger configured to cause heat-exchange between refrigerant flowing in the second heat exchanger and air passing through the second heat exchanger.
F24F 12/00 - Use of energy recovery systems in air conditioning, ventilation or screening
F24F 11/77 - Control systems characterised by their outputsConstructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
F25B 9/00 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
An indoor unit of a heat pump includes a housing having a back to be mounted on a wall and a front opposite to the back, a heat exchanger accommodated in the housing, a piping connection section fluidly connected to the heat exchanger at one side of the heat exchanger and connecting the heat exchanger to a refrigerant circuit of the heat pump, a fan for inducing air flow through the heat exchanger, heat being exchanged between refrigerant flowing through the heat exchanger and air flow, and a refrigerant leakage detection sensor detecting refrigerant leakage in the indoor unit, and being accommodated in the housing. The refrigerant leakage detection sensor is positioned, in a front view of the indoor unit, beside the heat exchanger and in front of the piping connection section and, in a side view, between the front of the housing and the piping connection section.
An air conditioning system includes a compressor unit including a compressor, a heat exchanger unit including an outdoor heat exchanger, an indoor unit, and a valve unit including a liquid control valve and a gas control valve. The heat exchanger unit is installed in a first space, while the compressor unit and the valve unit are installed in a second space. The system further includes a first leakage detector disposed in the second space, and a ventilation control structure that is configured to switch the state of the second space from a first state to a second state when the detected concentration of the first refrigerant is equal to or greater than a first detection value threshold, in the second state a ventilation of the second space being promoted more than in the first state.
F24F 11/84 - Control systems characterised by their outputsConstructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
F24F 11/36 - Responding to malfunctions or emergencies to leakage of heat-exchange fluid
An air conditioner (1) includes a refrigerant circuit (19), a main board (200), and a backup board (300). The refrigerant circuit (19) includes a shutoff valve (58A to 58D, 59A to 59D) that shuts off a refrigerant flow. The main board (200) includes a microcomputer (220) that controls the shutoff valve (58A to 58D, 59A to 59D). The backup board (300) supplies power from a capacitor (330) to the main board (200). The backup board (300) includes a charging circuit (320) that receives power supply from an outside and charges the capacitor (330). The microcomputer (220) detects whether the backup board (300) is connected to the main board (200) based on a voltage on the upstream side of the charging circuit (320).
A refrigerant circuit for a refrigeration apparatus with a thermal storage, which is using CO2 as refrigerant, includes: at least one compressor, a heat-source-side heat exchanger, an expansion device, and a thermal storage, including a thermal storage material, which is preferably a phase changing material from the group: organic PCMs like bio-based, paraffin, carbohydrate or lipid derived, or water. The refrigerant circuit further includes: a first fluid communication pipe communicating between a fluid side of the heat-source-side heat exchanger and one side of the thermal storage, and a second fluid communication pipe communicating between the expansion device and the other side of the thermal storage.
The current invention relates to a Method for determining shutoff valve and refrigerant leakage sensor interlinking for an air-conditioning system. The method comprises the steps of preparing a floorplan of a building with multiple rooms, mapping indoor units of the air-conditioning system and shutoff valves on the floorplan, mapping pipes between the shutoff valves and the indoor units on the floorplan, identifying each room having at least one indoor unit and/or refrigerant carrying piping, identifying each refrigerant leakage sensor installed in each room having at least one indoor unit and/or refrigerant carrying piping. This information is then used to determine correspondence relationships between each refrigerant leakage sensor and each room, between each valve and each pipe and between each pipe and each room through which said pipe passes and/or enters. These three types of correspondence relationships are used to determine a fourth correspondence relationship each between shutoff valve and each refrigerant leakage sensor.
F24F 1/32 - Refrigerant piping for connecting the separate outdoor unit to indoor units
F24F 11/36 - Responding to malfunctions or emergencies to leakage of heat-exchange fluid
F24F 11/84 - Control systems characterised by their outputsConstructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
F25B 1/00 - Compression machines, plants or systems with non-reversible cycle
F25B 41/42 - Arrangements for diverging or converging flows, e.g. branch lines or junctions
44.
AIR CONDITIONING SYSTEM AND METHOD OF ESTABLISHING A CONTROL LOGIC FOR SHUTOFF VALVE ACTUATION
The current invention relates to an Air conditioning system comprising compressor unit connected to a plurality of indoor by means of a plurality of pipes; a switching unit between the outdoor unit and each indoor unit, said switching unit comprising a plurality of shutoff valves; a plurality of leak detection sensors; and a controller configured to control the plurality shutoff valves and have information of associating each of the shutoff valves to at least one sensor. In order to safely and efficiently manage refrigerant leaks, the shutoff valves are operated based on information from their associated sensors.
F24F 11/36 - Responding to malfunctions or emergencies to leakage of heat-exchange fluid
F24F 11/84 - Control systems characterised by their outputsConstructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
F24F 1/32 - Refrigerant piping for connecting the separate outdoor unit to indoor units
F25B 41/42 - Arrangements for diverging or converging flows, e.g. branch lines or junctions
A refrigeration device configured to be used in a heating mode and a cooling mode, comprising a compressor (1), a plurality of utilization side heat exchangers, an expansion mechanism (4) and a heat source side heat exchanger (5) fluidly connected in series to constitute a refrigeration circuit. The refrigeration device also comprises a first refrigerant pipe (6), which extends from the compressor (1) to a first utilization side heat exchanger (2) of the plurality of utilization side heat exchangers and comprises a first valve (7) configured to at least fully open and fully close the first refrigerant pipe (6), as well as a second refrigerant pipe (8), which extends from the compressor (1) to a second utilization side heat exchanger (3.1, 3.2, 3.3) of the plurality of utilization side heat exchangers and comprises a second valve (9) configured to at least fully open and fully close the second refrigerant pipe (8). The refrigeration device further comprises a controller, which is configured to control the operation of the first valve (7) and the second valve (9). When the first utilization side heat exchanger (2) and the second utilization side heat exchanger (3.1, 3.2, 3.3) are both operated, when the refrigeration device is used in the heating mode, the controller is configured to compare a predetermined capacity of the heat source side heat exchanger (5) and/or the compressor (1) with a required capacity of the first utilization side heat exchanger (2) and the second utilization side heat exchanger (3.1, 3.2, 3.3). When the required capacity exceeds the predetermined capacity, the controller is configured to close the first valve (7) or the second valve (9).
A refrigeration device comprises a compressor (1), a plurality of utilization side heat exchangers, an expansion mechanism (4) and a heat source side heat exchanger (5), which are fluidly connected in series to constitute a refrigeration circuit. The refrigeration device further comprises a first refrigerant pipe (6), which extends from the compressor (1) to a first utilization side heat exchanger (2) of the plurality of utilization side heat exchangers. The first refrigerant pipe (6) comprises a first valve (7) configured to at least fully open and fully close the first refrigerant pipe (6). The refrigeration device also comprises a second refrigerant pipe (8), which extends from the compressor (1) to a second utilization side heat exchanger (3.1, 3.2, 3.3) of the plurality of utilization side heat exchangers. The second refrigerant pipe (8) comprises a second valve (9) configured to at least fully open and fully close the second refrigerant pipe (8). The refrigeration device also comprises a controller, which is configured to fully close the first valve (7) when the operation of the first utilization side heat exchanger (2) is stopped and/or which is configured to fully close the second valve (9) when the operation of the second utilization side heat exchanger (3.1, 3.2, 3.3) is stopped. In addition, the refrigeration device comprises a first bypass pipe (10) extending from a downstream side (6.2) of the first valve (7) when the refrigeration device is used in a heating mode to a suction side of the compressor (1) and a second bypass pipe (11) extending from a downstream side (8.2) of the second valve (9) when the refrigeration device is used in a heating mode to a suction side of the compressor (1). The first and second bypass pipes (10, 11) each comprise pressure- reducing means (12) that are configured to reduce the pressure of a refrigerant in the first and second bypass pipes (10, 11).
A safety system for a heat pump system includes a plurality of valve units each having refrigerant pipe portions with control valves, a refrigerant leakage detector, and a casing accommodating the valves and the refrigerant leakage detector and formed with first and second openings. The safety system further includes a connection structure connecting the internal spaces of the casings via the first and second openings, and a discharge structure connected to the connection structure or one of the casings and configured to discharge air from the internal space of the casing in which a refrigerant leakage has occurred. The casing has first and second lateral faces facing different directions, and the first opening is formed in the first lateral face and the second opening is formed in the second lateral face.
F24F 11/36 - Responding to malfunctions or emergencies to leakage of heat-exchange fluid
F24F 1/0068 - Indoor units, e.g. fan coil units characterised by the arrangement of refrigerant piping outside the heat exchanger within the unit casing
F24F 11/84 - Control systems characterised by their outputsConstructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
48.
HEAT PUMP SYSTEM AND CONTROLLER FOR CONTROLLING OPERATION OF THE SAME
Provided is a heat pump system having a compressor, a liquid-side on-off valve, a gas-side on-off valve, and a controller. The controller is configured to perform a refrigerant recovery operation for recovering refrigerant from a utilization-side piping section to a heatsource-side piping section by operating the compressor while the liquid-side on-off valve is closed and the gas-side on-off valve is open, and control the system such that the gas-side on-off valve starts closing when a predetermined valve-close condition is satisfied during the compressor is operating for recovering refrigerant, and such that the operation of the compressor for recovering refrigerant stops after the closing of the gas-side on-off valve started.
F25B 41/39 - Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
An indicator outputs information relating to a heat-pump system including a plurality of usage-side units which form a communication network. The indicator includes a mode management section configured to accept selection from a plurality of operation modes of the indicator including a first mode, a unit-side communication section configured to receive or acquire first and second unit signals from a predetermined usage-side unit of the usage-side units, and an indicator output section. The first unit signal is used for information originated by the predetermined usage-side unit. The second unit signal is used for information not originated by the predetermined usage-side unit. The indicator output section is configured to, when alarm information has been received or acquired via a second unit signal while the indicator is operating in a first mode, output the alarm information.
A refrigerant leakage detection sensor for a heat pump includes a sensor casing, a circuit board enclosed by the sensor casing, and a gas sensor mounted on the circuit board. The gas sensor has a housing, a refrigerant reception area at an end of the housing allowing gaseous refrigerant to enter the housing, and a sensing element in the housing. The housing protrudes through an opening in the sensor casing so that the refrigerant reception area is arranged outside the sensor casing and the sensing element is positioned inside the sensor casing.
A method monitors an air-conditioner having a semi-conductor gas sensor, the method including: determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a first threshold when the fan is in operation; starting operation of the fan as a provisional operation if the detection value is equal to or greater than a second threshold when the fan is not in operation; stopping the provisional operation of the fan; determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a third threshold after stopping the provisional operation of the fan; and taking a predetermined action for outputting alarm information and/or limiting supply of refrigerant to the heat exchanger when a refrigerant leakage is determined to have occurred.
F24F 11/36 - Responding to malfunctions or emergencies to leakage of heat-exchange fluid
F24F 11/64 - Electronic processing using pre-stored data
F24F 11/65 - Electronic processing for selecting an operating mode
F24F 11/755 - Control systems characterised by their outputsConstructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity for cyclical variation of air flow rate or air velocity
F24F 11/89 - Arrangement or mounting of control or safety devices
F24F 110/65 - Concentration of specific substances or contaminants
A refrigerant cycle apparatus includes a refrigerant circuit that circulates a refrigerant, and a leak sensor that detects a refrigerant leaking from the refrigerant circuit, in which the refrigerant cycle apparatus includes, as an operating mode, a recovery mode for recognizing occurrence of an abnormality in the leak sensor and recovering a refrigerant to a predetermined location in the refrigerant circuit.
A heat pump system includes a first bypass pipe provided with a first bypass valve and connecting a liquid refrigerant pipe and a low-pressure refrigerant pipe, a refrigerant heat exchanger configured to cause a heat-exchange between refrigerant flowing in the liquid refrigerant pipe and refrigerant flowing in first bypass pipe, a second bypass pipe provided with a second bypass valve and connecting the liquid refrigerant pipe and the low-pressure refrigerant pipe, and a controller. The controller is configured to control opening degree of the first bypass valve based on detected superheated temperature of refrigerant flowing in the first bypass pipe, and detected discharge temperature of a compressor and control opening degree of the second bypass valve based on the detected discharge temperature.
A valve unit for a heat-pump system, includes: a liquid refrigerant pipe portion; a gas refrigerant pipe portion; a liquid control valve disposed in the liquid refrigerant pipe portion; a gas control valve disposed in the gas refrigerant pipe portion; a casing accommodating the liquid control valve and the gas control valve; and an air-discharge mechanism that discharges air in an internal space of the casing to an external space outside the casing in response to a refrigerant leakage in the casing.
A ceiling-mounted air conditioning indoor unit for a heat pump including a refrigerant circuit, the ceiling-mounted air conditioning indoor unit includes: a casing including an air inlet and an air outlet; a drain pan in a bottom portion of the casing; a heat exchanger in the refrigerant circuit that is disposed above the drain pan such that water dropping from the heat exchanger accumulates in the drain pan; a fan in the casing that draws air in from the air inlet, through the heat exchanger, and out of the air outlet; a bell mouth at the air inlet that guides the air drawn-in to the fan; a refrigerant leakage detection sensor that detects refrigerant leaking from the refrigerant circuit. The drain pan includes a first rim and a second rim.
The present disclosure relates to a computer-implemented method of acquiring a user consumption pattern (UCP) of domestic hot water, the method including: acquiring data representing an amount of heat (ΣQT1) tapped from a heat storage tank (20) within a first time period (T1), generating a first history (H1) or data collection of data representing amount of heat (ΣQ), in particular cumulative heat, tapped from the heat storage tank (20) over a number of first time periods (T1), and acquiring a user consumption pattern of domestic hot water by applying a user-consumption-pattern-determination-algorithm to the generated first history (H1) or data collection of data representing amount of heat tapped from the heat storage tank (20), wherein the user-consumption-pattern-determination-algorithm is an algorithm trained on history(ies) or data collection(s) representing amount of heat (ΣQ) tapped and defining user consumption patterns of domestic hot water using one or more machine-learning-algorithms. Moreover, the disclosure relates to a controller (1) and a system (100) for controlling domestic hot water production and/or distribution. The disclosure further relates to a computer program and a computer-readable medium having stored the computer program thereon.
A refrigerant cycle apparatus includes a first heat source unit, a utilization unit, and a connection pipe. An installation method includes a refrigerant recovery step of recovering a first refrigerant having a first GWP and one or both of flammability and toxicity from the first heat source unit, and a refrigerant accommodation step of accommodating, in the first heat source unit, a second refrigerant recovered and regenerated from an existing facility and having a second GWP and one or both of non-flammability and non-toxicity.
A computer-implemented method monitors and/or controls domestic hot water production and/or distribution. The method includes detecting at least two real temperatures of a fluid stored in a heat storage tank at two different positions along a height of the heat storage tank at least at points in time, and acquiring a temperature distribution pattern of heat stored in the heat storage tank and/or corresponding heat distribution pattern data by applying a temperature-distribution-pattern-algorithm to the detected real temperatures detected at the points in time. The fluid is sanitary hot water, and the heat storage tank is a pressurized tank. A computer may carry out the method. The computer may be part of a system. A computer program may include instructions to cause the controller of to execute the method. The computer program may be stored on a computer-readable medium.
F24H 15/225 - Temperature of the water in the water storage tank at different heights of the tank
F24H 15/25 - Temperature of the heat-generating means in the heater
G05B 19/4155 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by programme execution, i.e. part programme or machine function execution, e.g. selection of a programme
A heat pump device having a refrigerant circuit includes: a valve configured to maintain an opening degree during non-energization; a valve drive circuit configured to cause operation of the valve; a valve controller configured to control the valve drive circuit; and a power source circuit configured to supply a power source to the valve drive circuit. The power source circuit includes: a first power source circuit unit configured to receive power source supply from outside to generate a DC: voltage; and a second power source circuit unit for backup. The second power source circuit unit receives power source supply from the outside to store power in a capacitor, and connects the capacitor in parallel to a first output electric path of the first power source circuit unit.
A heat pump including a refrigerant circuit configured to circulate flammable refrigerant, and an indoor unit configured to be arranged in an indoor space. The refrigerant circuit has a compressor, a utilisation-side heat exchanger, an expansion device and a heat-source-side heat exchanger connected by piping. The an indoor unit includes an outer casing having a top, and a sealed container accommodated in the outer casing. The sealed container has a bottom and a top and accommodates at least one of the compressor, the utilisation-side heat exchanger, the expansion device, and the heat-source-side heat exchanger. The sealed container has a release opening to exhaust leaking refrigerant to an exterior of the outer casing of the indoor unit.
DAIKIN AIRCONDITIONING CENTRAL EUROPE HANDELSGMBH (Austria)
Inventor
Yamaguchi, Takahiro
Hirose, Tadashi
Seikoba, Suguru
Yamaguchi, Yumi
Krapanic, Hrvoje
Ingebrigtsen, Erlend
Kobelt, Daniel
Barmparitsas, Nikolaos
Abstract
A refrigerant quality control system indicates quality information of a recovered refrigerant. The refrigerant quality control system includes a CPU and a storage. The CPU is configured to acquire first information related to a quality of the recovered refrigerant from a first information terminal possessed by a provider of the recovered refrigerant via a communication network. The storage stores the first information acquired by the CPU. The CPU is further configured to provide a second information terminal with second information based on the first information stored in the storage via the communication network. The second information terminal is possessed by an entity different from the provider.
The present invention aims to alleviate the risk of leakage of refrigerant from a refrigerant circuit and particularly at the utilization side of the refrigerant circuit without the need to provide a dedicated bypass for refrigerant leakage prevention. A refrigerant system is configured such that, when a refrigerant leakage detection sensor detects refrigerant leakage, a controller is configured to adjust a opening degree of a bypass expansion valve independently of a pressure and/or temperature value detected by a sensor. A method of controlling a refrigerant system is also provided.
A compressor unit includes a first case, a compressor, a connecting port, and a shutoff valve. The connecting port includes a first connecting port and a second connecting port. The shutoff valve includes a first shutoff valve and a second shutoff valve. A heat source heat exchanger is accommodated in a second case. A utilization heat exchanger is accommodated in a third case. The compressor unit is disposed inside a building. The first connecting port is connected to the heat source heat exchanger via a first connection piping. The second connecting port is connected to the utilization heat exchanger via a second connection piping. The first shutoff valve shuts off flow of a refrigerant between the first connecting port and the heat source heat exchanger. The second shutoff valve shuts off flow of the refrigerant between the second connecting port and the utilization heat exchanger.
The present application relates to a system (100) for producing domestic hot water and heat for central heating comprising a heat generator (1) for obtaining heat from a heat source, the heat generator (1) having a generator outlet port (1.1) and a generator return port (1.2); a central heating circuit (3) having a heating feed port (3.1) and a heating return port (3.2); a tank (11) having a top portion and a bottom portion, the tank (11) containing a heat storing medium (12); a first tapping coil (7) immersed in the heat storing medium (12) in the bottom portion of the tank (11); a second tapping coil (6) immersed in the heat storing medium (12) in the top portion of the tank (11); and means (8, 9, 13, 14) to warm up domestic hot water; wherein the heat generator (1), the second tapping coil (6), the central heating circuit (3), and the first tapping coil (7) are fluidly connected in series so as to allow fluid to flow from the heat generator (1) via at least one of the second tapping coil (6), the central heating circuit (3), and the first tapping coil (7) back to the heat generator (1); the system (100) further comprising a first three-way valve (2) fluidly connected to the generator outlet port (1.1), the second tapping coil (6), and the heating feed port (3.1) and configured to selectively let the fluid bypass, or flow through, the second tapping coil (6); a second three-way valve (4) fluidly connected to the heating feed port (3.1) and the heating return port (3.2) and configured to selectively let the fluid bypass, or flow through, the central heating circuit (3); and a third three-way valve (5) fluidly connected to the first tapping coil (7) and the generator return port (1.2) and configured to selectively let the fluid bypass, or flow through, the first tapping coil (7).
F24D 3/08 - Hot-water central heating systems in combination with systems for domestic hot-water supply
F24H 1/43 - Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes helically or spirally coiled
F24H 1/52 - Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
F24D 11/00 - Central heating systems using heat accumulated in storage masses
68.
SYSTEM AND METHOD FOR PRODUCING DOMESTIC HOT WATER
The present disclosure relates to a system for producing domestic hot water, comprising a tank (10) having a top portion and a bottom portion, the tank (10) containing a heat storing fluid (12), a tapping unit (14) comprising a first tapping coil (20) and a second tapping coil (22), wherein the first tapping coil (20) is fluidly connected to a cold water port (16) and to a hot water port (18), and is immersed in the heat storing fluid (12) in the bottom portion of the tank (10), wherein the second tapping coil (22) is fluidly connected in series to the first tapping coil (20) by a connection pipe (32), and to the hot water port (18), and is immersed in the heat storing fluid (12) in the top portion of the tank (10), a switching device (40) configured to switch between a first state in which water flows from the cold water port (16) through only the first tapping coil (20) to the hot water port (18), and a second state in which water flows from the cold water port (16) through the first tapping coil (20) and, after having flown through the first tapping coil (20), through to the second tapping coil (22) to the hot water port (18). The present disclosure further relates to correspond method for producing domestic hot water.
F24D 17/02 - Domestic hot-water supply systems using heat pumps
F28D 20/00 - Heat storage plants or apparatus in generalRegenerative heat-exchange apparatus not covered by groups or
F28D 1/047 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
69.
SYSTEM FOR PRODUCING HEAT FOR DOMESTIC HOT WATER OR CENTRAL HEATING
The present application relates to a system (100) for producing domestic hot water and heat for central heating comprising a heat generator (1) for obtaining heat from a heat source, the heat generator having a generator outlet port (1.1) and a generator return port (1.2); a central heating circuit (3) having a heating feed port (3.1) and a heating return port (3.2); and a tank (16) having an inlet port (7), an upper port (8) and a lower port (9), the tank (16) containing a fluid which is a heat storing fluid, and the inlet port (7) being configured to feed the heat storing fluid (15) into the tank (16). The heat generator (1), the central heating circuit (3), and the tank (16) are fluidly connected in series so as to allow the fluid (15) to flow from the heat generator (1) via at least one of the central heating circuit (3) and the tank (16) back to the heat generator (1), and the system (100) further comprises a first three-way valve (4) fluidly connected to the heating feed port (3.1) and the heating return port (3.2) and configured to selectively let the fluid bypass, or flow through, the central heating circuit (3); a second three-way valve (6) fluidly connected to the first three-way valve (4), the generator return port (1.2), and the inlet port (7), and configured to selectively let the fluid bypass, or flow through, the tank (16) via the inlet port (7); and a third three-way valve (10) fluidly connected to the upper port (8), the lower port (9), and the generator return port (1.2), and configured to set a relative proportion by which the fluid flows through the upper port (8) and the lower port (9), respectively, to the generator return port (1.2).
A heat pump includes a compressor for compressing a refrigerant, a first heat exchanger, a main expansion mechanism and a second heat exchanger arranged in a refrigeration path, the compressor having a suction port, a compression port and an injection port; a gas injection valve connected on a first side to the refrigeration path between the first heat exchanger and the main expansion mechanism and on a second side to the injection port of the compressor; a liquid injection valve connected on a first side to the refrigeration path between the first heat exchanger and the main expansion mechanism and on a second side between the second heat exchanger and the suction port of the compressor; and a controller, the controller being configured to operate the gas injection valve to inject at least partly gaseous refrigerant into the compressor through the injection port of the compressor, and to operate the liquid injection valve to inject substantially liquid refrigerant into the compressor through the suction port of the compressor.
A compressor unit includes a first case, a first compressor, a cascade heat exchanger, a second compressor, a first connecting port, and a second connecting port. The first compressor, the cascade heat exchanger, and a heat source heat exchanger accommodated in a second case constitute a first refrigerant cycle. The second compressor, the cascade heat exchanger, and a utilization heat exchanger accommodated in a third case constitute a second refrigerant cycle. The first connecting port is connected to the heat source heat exchanger via a first connection piping. The second connecting port is connected to the utilization heat exchanger via a second connection piping.
F25B 7/00 - Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
A heat source unit for a heat pump having a refrigerant circuit, the heat source unit having: an outer casing including a bottom plate; and a compressor assembly accommodated in the outer casing, the compressor assembly including a compressor of the refrigerant circuit of the heat pump including a compressor housing, a support plate supporting the compressor, the support plate being mounted via dampers to the bottom plate, and a compressor casing enclosing the compressor and the compressor housing. A damping mechanism is arranged between the compressor and the support plate, and the compressor casing is fixed to the support plate out of contact with the compressor housing.
This refrigerant recovery device (100) comprises a first port (101), a second port (102), a refrigerant flow path (30), and a specification unit (210). The first port (101) connects to target equipment (10) from which a refrigerant is recovered. The second port (102) connects to a container (110) into which the refrigerant recovered from the target equipment (10) is introduced. The refrigerant flow path (30) links the first port (101) and the second port (102). The refrigerant flow path (30) has at least an expansion mechanism (40), a compressor (80), and a heat exchanger (90). The specification unit (210) specifies the type of refrigerant recovered from the target equipment (10). The specification unit (210) specifies the type of refrigerant recovered from the target equipment (10) on the basis of a first value and a second value. The first value relates to a first refrigerant temperature, which is the temperature of refrigerant on the first-port (101) side of the compressor (80). The second value relates to a second refrigerant temperature, which is the temperature of refrigerant on the second-port (102) side of the compressor (80).
The invention relates to a flow hydroblock (3.1) connected with a heat exchanger (2) within a hydroblock group (3) of water heater device (1), including a filling valve (4), a safety valve (6), and a 3-way valve (5), and for keeping constant pressure within the hydroblock group; the filling valve is positioned either in a way that water entering the flow hydroblock between the heat exchanger and the outlet direction of the 3-way valve, or in a way that water entering the flow hydroblock before the inlet direction of the 3-way valve, and safety valve is positioned before inlet direction of the 3-way valve.
22 as refrigerant, including: at least one compressor (10), a heat-source-side heat exchanger (11), an expansion device (12), and a thermal storage (20), including a thermal storage material (21), which is preferably a phase changing material (PCM) from the group: organic PCMs like bio-based, paraffin, carbohydrate or lipid derived, or water, wherein the refrigerant circuit (1) further includes: a first fluid communication pipe (30) communicating between a fluid side of the heat-source-side heat exchanger (11) and one side of the thermal storage (20), and a second fluid communication pipe (40) communicating between the expansion device (12) and the other side of the thermal storage (20).
An outdoor unit for a heat pump includes a refrigerant circuit, the outdoor unit including a compressor, a discharge pipe of the refrigerant circuit connected to a discharge side of the compressor, a bottom plate, the bottom plate having a base and an outer flange protruding upward from an outer edge of the base, a heat source heat exchanger supported on the bottom plate, a liquid refrigerant pipe of the refrigerant circuit connected to the heat source heat exchanger, and a defrosting bypass pipe connected at one end to the discharge pipe and at the opposite end to the liquid refrigerant pipe, the defrosting bypass pipe being arranged between an inner side of the flange and an outer side of the heat source heat exchanger.
Indoor unit of a heat pump comprising a refrigerant circuit, wherein the indoor unit comprises a housing (10) having a back (16) configured to be mounted on a wall and a front (18) opposite to the back (16), a heat exchanger (30) accommodated in the housing (10), a piping connection section (52) fluidly connected to the heat exchanger (30) at one side (46) of the heat exchanger (30) and configured to connect the heat exchanger (30) to the refrigerant circuit of the heat pump, a fan for inducing an air flow through the heat exchanger (30), wherein heat is to be exchanged between a refrigerant flowing through the heat exchanger (30) and the air flow, and a refrigerant leakage detection sensor (60) for detecting a refrigerant leakage in the indoor unit, the refrigerant leakage detection sensor (60) being accommodated in the housing, wherein the refrigerant leakage detection sensor (60) is positioned, in a front view of the indoor unit, beside the heat exchanger (30) and in front of the piping connection section (52) and, in a side view of the indoor unit, between the front (18) of the housing (10) and the piping connection section (52).
Provided an air conditioning system (110h) comprising a compressor unit (111h) including a compressor (112h), a heat exchanger unit (101h) including an outdoor heat exchanger (102h), an indoor unit (120), and a valve unit (200h) including a liquid control valve (364) and a gas control valve (365). The heat exchanger unit is installed in a first space (931h), while the compressor unit and the valve unit are installed in a second space (932h). The system further comprises a first leakage detector disposed in the second space a, and a ventilation control structure that is configured to switch the state of the second space from a first state to a second state when the detected concentration of the first refrigerant is equal to or greater than a first detection value threshold, in the second state a ventilation of the second space being promoted more than in the first state.
F24F 3/06 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
F24F 11/36 - Responding to malfunctions or emergencies to leakage of heat-exchange fluid
F24F 11/89 - Arrangement or mounting of control or safety devices
F24F 13/10 - Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
F24F 140/40 - Damper positions, e.g. open or closed
F24F 11/62 - Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
F25B 13/00 - Compression machines, plants or systems, with reversible cycle
80.
SAFETY SYSTEM AND METHOD FOR CONSTRUCTING AIR CONDITIONING SYSTEM
Provided a safety system for a heat pump system, comprising a plurality of valve units each having refrigerant pipe portions with control valves, a refrigerant leakage detector, and a casing (400e) accommodating the valves and the refrigerant leakage detector and formed with first and second openings (420, 430). The safety system further comprises a connection structure connecting the internal spaces of the casings via the first and second openings, and a discharge structure connected to the connection structure or one of the casings and configured to discharge air from the internal space of the casing in which a refrigerant leakage has occurred. The casing has first and second lateral faces facing different directions, and the first opening is formed in the first lateral face and the second opening is formed in the second lateral face.
F24F 3/06 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
F24F 11/36 - Responding to malfunctions or emergencies to leakage of heat-exchange fluid
F24F 11/89 - Arrangement or mounting of control or safety devices
F24F 13/10 - Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
F24F 140/40 - Damper positions, e.g. open or closed
F24F 11/62 - Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
F25B 13/00 - Compression machines, plants or systems, with reversible cycle
An air-conditioner includes: a return-air inlet and a supply-air outlet each communicating with a predetermined space; a first main air channel configured to allow air to flow therein towards the supply-air outlet; a first heat exchanger disposed in the first main air channel and that causes heat-exchange between refrigerant flowing therein and air passing therethrough; an exhaust-air outlet communicating with an outside of the predetermined space; a second main air channel configured to allow air to flow therein towards the exhaust-air outlet; a second heat exchanger disposed in the second main air channel and that causes heat-exchange between refrigerant flowing therein and air passing therethrough; and an exhaust ventilation channel configured to allow air to flow therein from the return-air inlet towards the exhaust-air outlet.
F24F 12/00 - Use of energy recovery systems in air conditioning, ventilation or screening
F24F 11/77 - Control systems characterised by their outputsConstructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
In the present invention, a refrigeration cycle device (11) comprises a refrigerant circuit (23) for circulating a refrigerant, and a leakage sensor (27) for detecting refrigerant that has leaked from the refrigerant circuit (23). The refrigeration cycle device (11) further comprises, as an operation mode, a recovery mode in which the incidence of a fault in the leakage sensor (27) is recognized and refrigerant is recovered at a prescribed location in the refrigerant circuit (23).
Provided is a heat pump system (100) having a compressor (210), a liquid-side on-off valve (420), a gas-side on-off valve (460), and a controller (600). The controller is configured to perform a refrigerant recovery operation for recovering refrigerant from a utilization-side piping section (102) to a heatsource-side piping section (101) by operating the compressor while the liquid-side on-off valve is closed and the gas-side on-off valve is open, and control the system such that the gas-side on-off valve starts closing (S2100) when a predetermined valve-close condition is satisfied during the compressor is operating for recovering refrigerant, and such that the operation of the compressor for recovering refrigerant stops (S2400) after the closing of the gas-side on-off valve started.
Provided is a heat pump system (100) having a liquid-side on-off valve (420), a gas-side on-off valve (460), an ambient temperature detector (520) configured to detect temperature of fluid which passes through a heatsource-side heat exchanger (230), and a controller (600). The controller is configured to perform a refrigerant recovery operation for recovering refrigerant from a utilization-side piping section to a heatsource-side piping section (101) by operating a compressor (210) while the liquid-side on-off valve is closed and the gas-side on-off valve is open, and control the compressor such that, when the ambient temperature is higher than or equal to a predetermined value (S1600: No), increase rate of compressor rotation speed is low (S1800) compared with that of when the ambient temperature is lower than the predetermined value (S1700).
Provided a valve unit (100) used for a heat-pump system, comprising: at least one liquid refrigerant pipe portion (210, 211); at least one gas refrigerant pipe portion (220, 221, 230, 240, 241); at least one liquid control valve (264) disposed in the liquid refrigerant pipe portion; at least one gas control valve (261, 262, 265) disposed in the gas refrigerant pipe portion; a casing (300) accommodating at least the liquid control valve and the gas control valve; and an air-discharge mechanism (500) configured to operate to discharge an air in an internal space (301) of the casing to an external space outside the casing when a refrigerant leakage in the casing has occurred.
The present disclosure relates to Refrigerant leakage detection sensor (1) for a heat pump, comprising: a sensor casing (2); a circuit board (3) enclosed by the sensor casing (2); and a gas sensor (4) mounted on the circuit board (3), the gas sensor (4) having a housing (5), a refrigerant reception area (6) at an end of the housing (5) allowing gaseous refrigerant to enter the housing (5) and a sensing element in the housing (5), wherein the housing (5) protrudes through an opening (7) in the sensor casing (2) so that the refrigerant reception area (6) is arranged outside the sensor casing (2) and the sensing element is positioned inside the sensor casing (2). Moreover, the disclosure relates to an air conditioning apparatus comprising such a refrigerant leakage detection sensor.
The present disclosure relates to a ceiling-mounted air conditioning indoor unit (1) for a heat pump comprising a refrigerant circuit, the indoor unit comprising: a casing (2) comprising an air inlet (2a) and at least one air outlet (2b); a drain pan (3) in a bottom portion of the casing (2), the drain pan (3) having an first rim (3a) and an second rim (3b); a heat exchanger (4) being part of the refrigerant circuit and arranged above the drain pan (3) so that water dropping from the heat exchanger (3) accumulates in the drain pan (3); a fan (5) accommodated in the casing (2) to draw air in the air inlet (2a) through the heat exchanger (4) and out of the at least one air outlet (2b), a bell mouth (6) located at the air inlet (2a) for guiding drawn in air to the fan (5), a refrigerant leakage detection sensor (7) for detecting refrigerant leaking from the refrigerant circuit, wherein the refrigerant leakage detection sensor (7) is positioned between an outer surface (8) of the second rim (3b) of the drain pan (3) and an inner surface (9) of the bell mouth (6), wherein the outer surface (8) of the second rim (3b) of the drain pan (3) and the inner surface (9) of the bell mouth (6) face each other.
F24F 1/0047 - Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
F24F 11/36 - Responding to malfunctions or emergencies to leakage of heat-exchange fluid
F24F 11/89 - Arrangement or mounting of control or safety devices
F24F 13/22 - Means for preventing condensation or evacuating condensate
G01M 3/16 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
92.
AIR-CONDITIONER, AIR-CONDITIONING SYSTEM, AND METHOD FOR MONITORING AIR-CONDITIONER
Provided is a method for monitoring an air-conditioner having a semi-conductor gas sensor, comprising: determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a first threshold when the fan is in operation (S1200, S1300, S2400); starting operation of the fan as a provisional operation if the detection value is equal to or greater than a second threshold when the fan is not in operation (S1200, S1400, S1800); stopping the provisional operation of the fan (S1800); determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a third threshold after stopping the provisional operation of the fan (S2100, S2400); and taking a predetermined action for outputting alarm information and/or limiting supply of refrigerant to the heat exchanger when a refrigerant leakage is determined to have occurred (S2400).
Disclosed is a method for installing a refrigerant cycle apparatus (100). The refrigerant cycle apparatus (100) comprises a first heat source unit (30), a utilization unit (10), and a connection piping (20). This method comprises a first-refrigerant recovery step (S102) and a second-refrigerant accommodation step (S107). In the first-refrigerant recovery step (S102), a first refrigerant (R1) is recovered from the first heat source unit (30). The first refrigerant (R1) has a first GWP coefficient, and is combustible and/or toxic. In the second-refrigerant accommodation step (S107), a second refrigerant (R2) is accommodated in the first heat source unit (30). The second refrigerant (R2) is recovered and recycled from an existing facility (200), has a second GWP coefficient, and is non-combustible and/or non-toxic.
Provided is a heat pump system (100) having a first bypass pipe (331) provided with a first bypass valve (341) and connecting a liquid refrigerant pipe (322) and a low-pressure refrigerant pipe (324), a refrigerant heat exchanger (314) configured to cause a heat-exchange between refrigerant flowing in the liquid refrigerant pipe and refrigerant flowing in first bypass pipe, a second bypass pipe (332) provided with a second bypass valve (342) and connecting the liquid refrigerant pipe and the low-pressure refrigerant pipe, and a controller 400. The controller is configured to control opening degree of the first bypass valve based on detected superheated temperature of refrigerant flowing in the first bypass pipe, and detected discharge temperature of a compressor (311) and control opening degree of the second bypass valve based on the detected discharge temperature.
Provided is an indicator (400) for outputting information relating to a heat-pump system (100) including a plurality of usage-side units (220) which form a communication network, comprising: a mode management section (462) configured to accept selection from a plurality of operation modes of the indicator including a first mode; a unit-side communication section (420) configured to receive or acquire first and second unit signals from a predetermined usage-side unit which is one of the usage-side units, the first unit signal being used for information originated by the predetermined usage-side unit, the second unit signal being used for information not originated by the predetermined usage-side unit; and an indicator output section (440) configured to, when alarm information has been received or acquired by means of a second unit signal during the indicator is operating in a first mode, output the alarm information.
F24F 11/52 - Indication arrangements, e.g. displays
F24F 11/526 - Indication arrangements, e.g. displays giving audible indications
F24F 11/54 - Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
F24F 3/06 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
The present invention describes a heat pump and a method for installing the same inside an indoor space. The heat pump comprises a refrigerant circuit configured to circulate flammable refrigerant as well as an indoor unit (10) configured to be arranged in the indoor space. The refrigerant circuit comprises a compressor, a utilisation-side heat exchanger (19), an expansion device and a heat-source-side heat exchanger connected by piping. Further, the indoor unit (10) comprises an outer casing (15) having a top (16) and a sealed container (20) accommodated in the outer casing (15). The sealed container (20) has a bottom (21) and a top (22) and accommodates at least one of the compressor, utilisation-side heat exchanger (20), the expansion device and the heat-source-side heat exchanger. The sealed container (20) has a release opening (23) to exhaust leaking refrigerant to the exterior of the outer casing (15) of the indoor unit (10).
F24F 1/02 - Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
F24F 1/022 - Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle
F24F 1/029 - Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by the layout or mutual arrangement of components, e.g. of compressors or fans
1R_t02R_t0 00-10-n1R_t02R_t0 2R_t0 detected at least at few points in time. Moreover, the disclosure relates to a controller 1 and a system 100 for monitoring and/or controlling domestic hot water production and/or distribution. The disclosure further relates to a computer program and a computer-readable medium having stored the computer program thereon.
The present invention aims to alleviate the risk of leakage of refrigerant from a refrigerant circuit and particularly at the utilization side of the refrigerant circuit without the need to provide a dedicated bypass for refrigerant leakage prevention. A refrigerant system is configured such that, if a refrigerant leakage detection sensor detects refrigerant leakage, a controller is configured to adjust a opening degree of a bypass expansion valve independently of a pressure and/or temperature value detected by a sensor. A method of controlling a refrigerant system is also provided.
A recycle information management system includes a communication device and a management device. The communication device transmits recycle information acquired from a recycle system via a network. The recycle system includes at least a recycling device that removes at least oil from the collected refrigerant to recycle the refrigerant. The management device includes a storage unit that stores the recycle information in association with a recycle system ID usable to identify the recycle system.
F25B 45/00 - Arrangements for charging or discharging refrigerant
F25B 43/00 - Arrangements for separating or purifying gases or liquidsArrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
F25B 43/02 - Arrangements for separating or purifying gases or liquidsArrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
F25B 49/02 - Arrangement or mounting of control or safety devices for compression type machines, plants or systems
The present disclosure relates to a heat pump (100) including a compressor (101) for compressing a refrigerant, a first heat exchanger (102), a main expansion mechanism (103) and a second heat exchanger (104) arranged in a refrigeration path (120), the compressor having a suction port (101a), a compression port (101c) and an injection port (101b); a gas injection valve (112) connected on a first side (112a) to the refrigeration path between the first heat exchanger and the main expansion mechanism and on a second side (112b) to the injection port of the compressor; a liquid injection valve (111) connected on a first side (111a) to the refrigeration path between the first heat exchanger and the main expansion mechanism and on a second side (111b) between the second heat exchanger and the suction port of the compressor; and a controller (130), the controller (130) being configured to operate the gas injection valve (112) to inject at least partly gaseous refrigerant into the compressor through the injection port, and to operate the liquid injection valve (111) to inject substantially liquid refrigerant into the compressor through the suction port of the compressor.
