A CENTRIFUGAL FAN ARRANGEMENT HAVING AN ADJUSTABLE EFFECTIVE FAN BLADE HEIGHT, A CONTROL SYSTEM FOR SAID CENTRIFUGAL FAN ARRANGEMENT AND A METHOD FOR CONTROLLING SAID CENTRIFUGAL FAN ARRANGEMENT
The disclosure relates to a centrifugal fan arrangement (10) comprising: an inlet (16) for an incoming flow of air; a front shroud (13) which is arranged concentrically around said inlet (16); a back plate (14); and a plurality of fan blades (15) extending from the front shroud (13) and defining an effective fan blade height (h); said fan arrangement (10) being configured for generating a volume flow of air at a corresponding pressure. Furthermore, the fan arrangement (10) is configured so as to be operated with an effective fan blade height (h) which is chosen with a value which provides a maximum coefficient of efficiency generally independently of said volume flow and pressure, along a system curve being associated with said fan arrangement (10).
The disclosure relates to a centrifugal fan arrangement (7) comprising: an inlet duct (6) for an incoming flow of air, and a fan (1; 1a; 1b) being formed by a front shroud (2) which is arranged concentrically around an end portion (4) of said inlet duct (6), a back plate (3) and a plurality of fan blades (4) which are arranged between said front shroud (2) and said back plate (3); wherein each one of said fan blades (4) has a leading edge (4a) and trailing edge (4b), and wherein the diameter (d1) of the inlet duct (6) is smaller than the inlet diameter (d2) of the front shroud (2), so that a gap (9) is formed between the inside of said front shroud (2) and the outside of said inlet duct (6); and wherein said gap (9) extends around the circumference of the inlet duct (6). Furthermore, the centrifugal fan arrangement (7) is configured so that: the diameter (d3) of the gap (9), at an exit portion (6a) of the inlet duct (6), is greater than the inlet diameter (d2) of the front shroud (2); and that the diameter (d3) of the gap (9), at the exit portion (6a) of the inlet duct (6), is also greater than or equal to a diameter (d4) which is defined by the position of each leading edge (4a) of said fan blades (4).
An AHU includes air channels. The air channel includes an air inlet and outlet guiding supply air into a building from outside or extract air from a building to the outside. The AHU is connected to an air ventilation ducting system. The AHU further includes a fan inducing a flow in the system when connected thereto. The fan provides a radial flow or mixed flow. The flow from the fan is redirected from radial flow to axial flow on its way from the inlet to the outlet. To provide a more efficient flow when the air flow from the fan changes direction, the fan includes a stator ring. The stator ring has an inner circumference encircling the fan's back plate and a surface essentially levelled with the surface at the edge of the back plate. The AHU may also include a flow guiding body guiding the air further downstream.
F24F 13/08 - Organes de réglage de l'écoulement d'air, p. ex. persiennes, grilles, volets ou plaques directrices
F24F 7/08 - Ventilation avec réseau de gaines à circulation d'air forcée, p. ex. par un ventilateur avec conduits séparés pour l'air fourni et l'air expulsé
HVAC systems (heating, ventilation and air conditioning); Air conditioning installations for industrial purposes; Combined heating and air conditioning apparatus; Indoor climate management system for regulation of ventilation and temperature; Fans for air conditioning apparatus.
Heating, ventilating, and air conditioning and purification equipment (ambient); Equipment for coordination of several units for the treatment of ventilation/cooling/heating in the same system.
7.
MOUNTING ARRANGEMENT FOR AN AIR TERMINAL DEVICE FOR CONTROL OF AIR FLOW IN A VENTILATION SYSTEM
The invention relates to an air terminal device (1) for a ventilation system for a building. The air terminal device (1) comprises a pressure box (2a), a recirculating air inlet (4), a ventilation air outlet (6) and a supply air inlet (8). The pressure box (2a) is provided with nozzles (3) for admitting air into a mixing chamber (2b). The recirculating air inlet (4) is designed for admitting recirculating air into a recirculating air chamber (2c). The ventilation air outlet (6) is designed for providing a flow of mixed supply air and recirculated air to a space to be ventilated. The flow of supply air induces a recirculating air flow and said recirculated air flow and supply air flow is mixed in the mixing chamber (2b). The mixed air will be admitted to the space to be ventilated via the ventilation air outlet (6). The air terminal device (1) forms part of a foundation structure or socle (101) of a cabinet (102). The invention also relates to a cabinet (101) comprising a socle (102) provided with an air terminal device (1) as described above.
F24F 1/01 - Climatiseurs individuels pour le conditionnement de l'air, p. ex. éléments séparés ou monoblocs ou éléments recevant l'air primaire d'une station centrale dans lesquels l'air secondaire est amené par l'action d'injection de l'air primaire
A47B 96/00 - Parties constitutives des meubles à tiroirs, étagères ou rayons non couvertes par un seul des groupes Éléments généraux de meubles
F24F 1/005 - Éléments intérieurs, p. ex. ventilo-convecteurs caractérisés par des dispositions de montage fixés sur le solÉléments intérieurs, p. ex. ventilo-convecteurs caractérisés par des dispositions de montage posés sur le sol
HVAC systems (heating, ventilation and air conditioning); Air conditioning installations for industrial purposes; Air conditioning installations for household purposes; Combined heating and air conditioning apparatus; Indoor climate management system for regulation of ventilation and temperature; Fans for air conditioning apparatus.
9.
Fan for air handling unit (AHU) assembled from several parts with radial and axial retainers
Disclosed is an Air Handling Unit, AHU, including a fan inducing a flow in an air ventilation ducting system. The fan includes a front disc, a back plate and fan blades manufactured as separate units. The fan provides a radial or mixed flow. The fan blades have an upper edge including upper attachment protrusions attached to the front disc and a lower edge including lower attachment protrusions attached to the back plate. The fan blade includes at least two upper and lower attachment protrusions protruding through the front disc and back plate indentations, respectively, forming axial retainers. An axial locker on the protruding portion provides a retaining axial force between the front disc and the back plate. The fan further includes another other upper and lower attachment protrusion cooperating with front disc and back plate indentations, respectively, forming radial retainers preventing the blades from dislocating in the radial direction.
The invention is directed to an Air Handling Unit (AHU). The AHU comprises one or several air channels 301, which may be an extract air channel and/or a supply air channel. The at least one air channel 301 comprises an air inlet and an air outlet for guiding supply air into a building from the outside or extract air from a building to the outside. The AHU is adapted to be connected to an air ventilation ducting system. The AHU further comprises at least one fan 1 in order to induce a flow in the air ventilation ducting system when connected thereto. The fan 1 is arranged to provide a radial flow or mixed flow from the fan 1. The flow from the fan 1 is redirected from radial flow to axial flow on its way from the inlet to the outlet. In order to provide a more efficient flow when the air flow from the fan 1 changes direction, the fan 1 has been provided with a stator ring 5. The stator ring have an inner circumference adapted to encircle the back plate of the fan and having a surface essentially levelled with the surface at the edge of the back plate. The AHU may further also comprise a flow guiding body 54 which is designed to guide the air flow through the AHU further downstream of the fan 1.
An Air Handling Unit, AHU, (100) comprising at least one fan (1, 1a, 1b) in order to induce a flow in an air ventilation ducting system (101). The fan is assembled from a front disc (2), a back plate (3) and a plurality of fan blades (4) being manufactured as separate units and designed and arranged to provide a radial flow or mixed flow from the fan (1 ). The fan blades (4) have an upper edge (43) comprising a multitude of upper attachment protrusions (43 a-e) designed to be attached to the front disc (2) and a lower edge (44) comprising a multitude of lower attachment protrusions (44 a-c) designed to be attached to the back plate (3). The fan blade (4) comprises at least two upper and two lower attachment protrusions (43 a-b, 44 a-b) designed to protrude through the front disc and back plate indentations (200 a-b, 300 a-b) respectively to form axial retainers (201,301). An axial locker (50) is provided on the protruding portion of the protrusions in order to provide a retaining force between the front disc (2) and the back plate (3) in the axial direction. The fan further comprises at least one other upper and lower attachment protrusion (43 c-e, 44 c) designed to cooperate with front disc and back plate indentations (200 c-e, 300 c) respectively so as to form radial retainers (202, 302) preventing the blades (4) to be dislocated in the radial direction.
An Air Handling Unit for a ventilation system in a building has supply and extract air channels, each with an inlet and an outlet for guiding air to and from a building. Each air channel includes a damper controlling air flow. The air channels are in a heat exchanging relation to each other. The AHU also includes a fan and an Electronic Control Unit. The ECU outputs a defrost cycle initiation signal to defrost the heat recovery arrangement. The ECU outputs a defrost cycle termination signal to end the defrost cycle upon indication of the defrosting being completed. To optimize the defrost cycle time the ECU changes the first or second criterion for defrost cycle termination signal depending on the time for performing the defrost cycle such that the time period of the defrost cycle is prolonged/shortened when the defrost cycle time period is shorter/longer than preferred.
37 - Services de construction; extraction minière; installation et réparation
41 - Éducation, divertissements, activités sportives et culturelles
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Construction, repair, and maintenance of heating, ventilation and air conditioning devices in the nature of HVAC systems; Commissioning services for HVAC systems, namely, inspection and start-up services of HVAC systems.
(2) Training services in the field of operation and maintenance of HVAC systems.
(3) Remote monitoring services of heating, ventilating, and air conditioning apparatus in the nature of HVAC systems.
37 - Services de construction; extraction minière; installation et réparation
41 - Éducation, divertissements, activités sportives et culturelles
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Construction, repair, and maintenance of heating, ventilation and air conditioning devices in the nature of HVAC systems Training services in the field of operation and maintenance of HVAC systems Commissioning services for HVAC systems, namely, inspection and start-up services of HVAC systems; Remote monitoring services of heating, ventilating, and air conditioning apparatus in the nature of of HVAC systems
15.
Air terminal device for control of air flow in a ventilation system
An air terminal device for a ventilation system includes a pressure box, with an inlet admitting supply air into the pressure box and outlet openings for admitting supply air out. The air terminal device further includes a cover plate to control and change the open area of the outlet openings. The outlet openings are in a wall of the pressure box forming an outlet surface of the pressure box. The cover plates are arranged to make contact with and slide relative the outlet surface while changing the open area of the outlet openings. The cover plate is located on the high pressure side of the outlet surface. The cover plate cooperates with the outlet surface such that there is at least one outlet opening or suction opening being partly or fully covered by the cover plate also when the air terminal device is set to maximum flow.
F24F 11/72 - Systèmes de commande caractérisés par leurs grandeurs de sortieDétails de construction de tels systèmes pour la commande de l’apport en air traité, p. ex. commande de la pression
F24F 1/0014 - Éléments intérieurs, p. ex. ventilo-convecteurs caractérisés par les sorties d’air comportant plusieurs orifices de sortie
F24F 13/10 - Organes de réglage de l'écoulement d'air, p. ex. persiennes, grilles, volets ou plaques directrices mobiles, p. ex. registres
F24F 1/0035 - Éléments intérieurs, p. ex. ventilo-convecteurs caractérisés par l’entrée d’air extérieur dans la pièce
F24F 1/0063 - Éléments intérieurs, p. ex. ventilo-convecteurs caractérisés par des échangeurs de chaleur par le montage ou la disposition des échangeurs de chaleur
F24F 1/01 - Climatiseurs individuels pour le conditionnement de l'air, p. ex. éléments séparés ou monoblocs ou éléments recevant l'air primaire d'une station centrale dans lesquels l'air secondaire est amené par l'action d'injection de l'air primaire
F24F 13/06 - Bouches pour diriger ou distribuer l'air dans des pièces ou enceintes, p. ex. diffuseur d'air de plafond
F24F 13/12 - Organes de réglage de l'écoulement d'air, p. ex. persiennes, grilles, volets ou plaques directrices mobiles, p. ex. registres à éléments coulissants
F24F 13/26 - Dispositions pour la circulation d'air par induction, p. ex. par couplage de fluide ou par effet thermique
F24F 1/0011 - Éléments intérieurs, p. ex. ventilo-convecteurs caractérisés par les sorties d’air
Disclosed is an air terminal device for a ventilation system for a building. The air terminal device includes a pressure box, with an inlet admitting supply air into the pressure box and outlet openings for admitting supply air out. The device further includes first and second cover plates, each arranged to control and change the open area of a plurality of the outlet openings. The outlet openings are arranged in a wall of the pressure box forming an outlet surface of the pressure box. The cover plate or cover plates are arranged to be in contact with and slide relative the outlet surface while changing the open area of the outlet openings. The first cover plate and the second cover plate are arranged to slide relative each other and to be in contact with and slide relative the outlet surface while changing the open area of the outlet openings.
F24F 1/0014 - Éléments intérieurs, p. ex. ventilo-convecteurs caractérisés par les sorties d’air comportant plusieurs orifices de sortie
F24F 11/72 - Systèmes de commande caractérisés par leurs grandeurs de sortieDétails de construction de tels systèmes pour la commande de l’apport en air traité, p. ex. commande de la pression
F24F 13/10 - Organes de réglage de l'écoulement d'air, p. ex. persiennes, grilles, volets ou plaques directrices mobiles, p. ex. registres
F24F 1/0035 - Éléments intérieurs, p. ex. ventilo-convecteurs caractérisés par l’entrée d’air extérieur dans la pièce
F24F 1/0063 - Éléments intérieurs, p. ex. ventilo-convecteurs caractérisés par des échangeurs de chaleur par le montage ou la disposition des échangeurs de chaleur
F24F 1/01 - Climatiseurs individuels pour le conditionnement de l'air, p. ex. éléments séparés ou monoblocs ou éléments recevant l'air primaire d'une station centrale dans lesquels l'air secondaire est amené par l'action d'injection de l'air primaire
F24F 13/06 - Bouches pour diriger ou distribuer l'air dans des pièces ou enceintes, p. ex. diffuseur d'air de plafond
F24F 13/12 - Organes de réglage de l'écoulement d'air, p. ex. persiennes, grilles, volets ou plaques directrices mobiles, p. ex. registres à éléments coulissants
F24F 13/26 - Dispositions pour la circulation d'air par induction, p. ex. par couplage de fluide ou par effet thermique
F24F 1/0011 - Éléments intérieurs, p. ex. ventilo-convecteurs caractérisés par les sorties d’air
The invention relates to An Air Handling Unit (AHU) 1 for a ventilation system in a building and a method for performing a defrosting operation on an AHU. The AHU 1 comprises a supply air channel 2 with a damper 4a, an extract air channel 3 with a damper 4b, a heat recovery arrangement between the channels, a fan 11a, 11b and an Electronic Control Unit, (ECU) 9. The ECU 9 is programmed to output a defrost cycle initiation signal to defrost the heat recovery arrangement according to a first predefined criteria. The ECU is programmed to output a defrost cycle termination signal in order to end the defrost cycle when the defrosting is completed according to a second criteria. To optimize the defrost cycle time period the ECU 9 is programmed to change the first predefined criteria or the second criteria.
The invention relates to an Air Handling Unit (AHU) (1) provided with a damper arrangement. The damper arrangement comprises a short cut damper (8, 408, 508) and an Electronic Control Unit (ECU)(9). The ECU (9) is programmed to control the damper (4a, 4b, 8) when the damper is changed from being in a first, open position (I) to a second, closed position (II) to be in a transition mode (III) before it will be in the second, closed position (II). The ECU (9) is programmed to set the damper (4a, 4b, 8) to oscillate or vibrate when the damper is in said transition mode. The main purpose for oscillating or vibrating the damper before closing it finally is to avoid the damper to get stuck due to freezing. The invention also relates to a method for controlling a damper (4a, 4b, 8) in a ventilation system in a building in order to prevent the damper from being stuck. The damper (8) is set to oscillate or vibrate in a transition mode (III) before the damper is set to be in a second, closed position (II) when changing from being in a first, open position (I) to a second, closed position (II).
F24F 13/10 - Organes de réglage de l'écoulement d'air, p. ex. persiennes, grilles, volets ou plaques directrices mobiles, p. ex. registres
F24F 12/00 - Utilisation de systèmes à récupération d'énergie dans le conditionnement de l'air, la ventilation ou la formation d'écrans d'air
F24F 13/12 - Organes de réglage de l'écoulement d'air, p. ex. persiennes, grilles, volets ou plaques directrices mobiles, p. ex. registres à éléments coulissants
09 - Appareils et instruments scientifiques et électriques
11 - Appareils de contrôle de l'environnement
35 - Publicité; Affaires commerciales
37 - Services de construction; extraction minière; installation et réparation
Produits et services
Linear and rotary actuators; Control devices for actuators. Control and Monitoring System for smoke and fire dampers; Linear and rotary actuators (electric). Dampers for preventing and inhibiting smoke and fires; In duct fire dampers. Retail services of ventilating ducts of metal, inspection hatches for ducts, linear and rotary actuators, control devices for actuators, control and monitoring system for smoke and fire dampers, linear and rotary actuators (electric), dampers for preventing and inhibiting smoke and fires, in duct fire dampers. Installation, maintenance and repair of fire and smoke preventing and inhibiting ventilating installations.
The invention relates to an air treatment system 1and a method for control of a defrosting operation of a heat exchanger 4 comprised in the system 1. The air treatment system 1 is provided with an extract air channel 2and a supply air channel 3 which are in a heat exchanging relation with each other via at least a first heat exchanger portion 4a and a second heat exchanger portion 4b, each one of the heat exchanger portions 4a, 4b provided with a respective flow controller 5a, 5b in the supply air channel 3. The air treatment further comprises one or several fans 6a, 6b and pressure indicating means 7a, 7b for measuring a pressure drop over the heat exchanger portions 4a, 4bin the extract air channel 2 and an Electronic Control Unit (ECU) 8programmed to output a defrost cycle initiation signal in dependence of the pressure drop over the heat exchanger 4. The defrost cycle includes a control signal to a selected flow controller 5a or 5b to reduce or restrict the flow in the supply air channel 3through a selected heat exchanger portion, e.g. the first one 4a. The ECU 8 is programmed to control the air flow in the supply air channel 3through the selected (first) heat exchanger portion 4a to be reduced or restricted while the pressure drop over the first heat exchanger portion 4a or 4bis decreasing and the reduced flow will continue until there is an indication that the pressure drop over the first heat exchanger portion 4a or 4b is essentially constant. This may for example be done by detecting a slight increase in the total pressure drop over both heat exchanger portions 4a, 4b due to a continued ice formation on the second heat exchanger portion 4b while the first heat exchanger portion is completely defrosted and have a constant pressure drop.
F24F 12/00 - Utilisation de systèmes à récupération d'énergie dans le conditionnement de l'air, la ventilation ou la formation d'écrans d'air
F24F 11/02 - Aménagements ou montage des dispositifs de commande ou de sécurité
F28F 27/02 - Commandes ou dispositifs de sécurité spécialement adaptés pour les appareils d'échange ou de transfert de chaleur pour commander la répartition des sources de potentiel calorifique entre des canaux différents
37 - Services de construction; extraction minière; installation et réparation
Produits et services
Apparatus for lighting, heating, steam generating, cooking,
refrigerating, drying, ventilating, water supply and
sanitary purposes; air handling units; chillers; heat pumps;
indoor climate management system for regulation of
ventilation and temperature; supply and extract air
diffusers; climate beams for cooling and heating of air;
cooling and heating induction units. Building construction; repair and maintenance of ventilation
and climate control products; installation services of
ventilation and climate control products.
37 - Services de construction; extraction minière; installation et réparation
Produits et services
Acoustic louvrers for silencing of ventilation ducts; sound
attenuators/silencers for placement in air ducts. Apparatus for lighting, heating, steam generating, cooking,
refrigerating, drying, ventilating, water supply and
sanitary purposes; air handling units; chillers; heat pumps;
indoor climate management system for regulation of
ventilation and temperature; supply and extract air
diffusers; climate beams for cooling and heating of air;
cooling and heating induction units. Building construction; repair; installation services.
37 - Services de construction; extraction minière; installation et réparation
Produits et services
Common metals and their alloys; metal building materials;
transportable buildings of metal; materials of metal for
railway tracks; non-electric cables and wires of common
metal; ironmongery, small items of metal hardware; pipes and
tubes of metal; safes; goods of common metal not included in
other classes; ores. Apparatus for lighting, heating, steam generating, cooking,
refrigerating, drying, ventilating, water supply and
sanitary purposes. Building materials (non-metallic); non-metallic rigid pipes
for building; asphalt, pitch and bitumen; non-metallic
transportable buildings; monuments, not of metal. Building construction; repair; installation services.
24.
AN AIR HANDLING UNIT FOR A VENTILATION SYSTEM IN A BUILDING AND A METHOD FOR PERFORMING A DEFROSTING OPERATION OF AN AIR HANDLING UNIT
The invention relates to An Air Handling Unit (AHU) 1 for a ventilation system in a building and a method for performing a defrosting operation on an AHU. The AHU 1 comprises a supply air channel 2 with a damper 4a, an extract air channel 3 with a damper 4b, a heat recovery arrangement between the channels, a fan 11a, 11b and an Electronic Control Unit, (ECU) 9. The ECU 9 is programmed to output a defrost cycle initiation signal to defrost the heat recovery arrangement according to a first predefined criteria. The ECU is programmed to output a defrost cycle termination signal in order to end the defrost cycle when the defrosting is completed according to a second criteria. To optimize the defrost cycle time period the ECU 9 is programmed to change the first predefined criteria or the second criteria.
An Air Handling Unit, AHU, (100) comprising at least one fan (1, 1a, 1b) in order to induce a flow in an air ventilation ducting system (101). The fan is assembled from a front disc (2), a back plate (3) and a plurality of fan blades (4) being manufactured as separate units and designed and arranged to provide a radial flow or mixed flow from the fan (1 ). The fan blades (4) have an upper edge (43) comprising a multitude of upper attachment protrusions (43 a-e) designed to be attached to the front disc (2) and a lower edge (44) comprising a multitude of lower attachment protrusions (44 a-c) designed to be attached to the back plate (3). The fan blade (4) comprises at least two upper and two lower attachment protrusions (43 a-b, 44 a-b) designed to protrude through the front disc and back plate indentations (200 a-b, 300 a-b) respectively to form axial retainers (201,301). An axial locker (50) is provided on the protruding portion of the protrusions in order to provide a retaining force between the front disc (2) and the back plate (3) in the axial direction. The fan further comprises at least one other upper and lower attachment protrusion (43 c-e, 44 c) designed to cooperate with front disc and back plate indentations (200 c-e, 300 c) respectively so as to form radial retainers (202, 302) preventing the blades (4) to be dislocated in the radial direction.
The invention is directed to an Air Handling Unit (AHU). The AHU comprises one or several air channels 301, which may be an extract air channel and/or a supply air channel. The at least one air channel 301 comprises an air inlet and an air outlet for guiding supply air into a building from the outside or extract air from a building to the outside. The AHU is adapted to be connected to an air ventilation ducting system. The AHU further comprises at least one fan 1 in order to induce a flow in the air ventilation ducting system when connected thereto. The fan 1 is arranged to provide a radial flow or mixed flow from the fan 1. The flow from the fan 1 is redirected from radial flow to axial flow on its way from the inlet to the outlet. In order to provide a more efficient flow when the air flow from the fan 1 changes direction, the fan 1 has been provided with a stator ring 5. The stator ring have an inner circumference adapted to encircle the back plate of the fan and having a surface essentially levelled with the surface at the edge of the back plate. The AHU may further also comprise a flow guiding body 54 which is designed to guide the air flow through the AHU further downstream of the fan 1.
