A heat pump heating, ventilation, and air conditioning (heat pump HVAC) system is operable to use a refrigerant to heat or cool an indoor space with a refrigerant circuit performing a reversible vapor compression cycle between an outdoor heat exchanger and an indoor heat exchanger. The heat pump HVAC system includes an ejector in fluid communication with the refrigerant circuit. The refrigerant circuit includes a first flow of refrigerant upstream from the outdoor heat exchanger and a second flow of refrigerant downstream from the outdoor heat exchanger; and the ejector is configurable to combine the first flow and the second flow into a combined flow, at least a portion of which is returned to the compressor.
A gas furnace with a flame arrestor may be used for arresting a potential flame caused by ignition of refrigerant in gas furnaces. The flame arrestor may be attached to a housing of the gas furnace. The flame arrestor may include a plurality of holes configured to arrest a flame propagating out of an air intake pipe of the gas furnace.
A gas furnace with a flame arrestor may be used for arresting a potential flame caused by ignition of refrigerant in gas furnaces. The flame arrestor may be attached to a housing of the gas furnace. The flame arrestor may include a plurality of holes configured to arrest a flame propagating out of an air intake pipe of the gas furnace.
A furnace assembly is disclosed that includes an intake manifold connectable to a fuel supply, a partition panel, and a burner assembly mountable to the partition panel and operable to combust a pre-mixed fuel and air mixture to produce a heated flue gas. The burner assembly includes burners configured to combust of the mixture into a flue gas. The burner assembly also includes a heat shielding plate located and shaped to reduce heat communicated to the partition panel due to the combustion. The heat shielding plate is manufactured using a high-temperature alloy and includes holes, each hole aligned with one of the burners. A groove in the plate accommodates thermal expansion of and reduces thermal deformation of the plate. A heat exchanger is mounted to the partition panel in thermal communication with the burners that includes tubes positioned to receive the heated flue gas.
A furnace assembly is disclosed that includes an intake manifold connectable to a fuel supply, a partition panel, and a burner assembly mountable to the partition panel and operable to combust a pre-mixed fuel and air mixture to produce a heated flue gas. The burner assembly includes burners configured to combust of the mixture into a flue gas. The burner assembly also includes a heat shielding plate located and shaped to reduce heat communicated to the partition panel due to the combustion. The heat shielding plate is manufactured using a high-temperature alloy and includes holes, each hole aligned with one of the burners. A groove in the plate accommodates thermal expansion of and reduces thermal deformation of the plate. A heat exchanger is mounted to the partition panel in thermal communication with the burners that includes tubes positioned to receive the heated flue gas.
F23D 14/04 - Brûleurs à gaz avec prémélangeurs, c.-à-d. dans lesquels le combustible gazeux est mélangé à l'air de combustion en amont de la zone de combustion du type à induction, p. ex. becs Bunsen
F23D 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
F24H 3/08 - Appareils de chauffage d'air à circulation forcée l'air étant maintenu séparé de l'agent chauffant, p. ex. par circulation forcée de l'air sur des radiateurs par tubes
F24H 9/1881 - Disposition ou montage ou des éléments chauffants de combustion, p. ex. des grilles ou des brûleurs utilisant un combustible fluide
Contemporaneous hybrid heating may be provided by a heat pump, including: an indoor heat exchanger located in or in communication with the conditioned environment; an outdoor heat exchanger located in or in communication with the outdoor environment, wherein the outdoor heat exchanger is in fluid communication with the indoor heat exchanger via a refrigerant circuit; a fueled heater; and a controller, configured to, when the system is operating in a hybrid heating mode, activate both of the heat pump and the fueled heater at a given time based on an air rise temperature measured across the indoor heat exchanger.
Contemporaneous hybrid heating may be provided by a heat pump, including: an indoor heat exchanger located in or in communication with the conditioned environment; an outdoor heat exchanger located in or in communication with the outdoor environment, wherein the outdoor heat exchanger is in fluid communication with the indoor heat exchanger via a refrigerant circuit; a fueled heater; and a controller, configured to, when the system is operating in a hybrid heating mode, activate both of the heat pump and the fueled heater at a given time based on an air rise temperature measured across the indoor heat exchanger.
F24F 5/00 - Systèmes ou appareils de conditionnement d'air non couverts par ou
F24F 11/80 - Systèmes de commande caractérisés par leurs grandeurs de sortieDétails de construction de tels systèmes pour la commande de la température de l’air fourni
F24D 12/02 - Autres systèmes de chauffage central avec plus d'une source de chaleur
F24D 15/04 - Autres systèmes de chauffage de locaux domestiques ou d'autres locaux utilisant des pompes à chaleur
F24H 9/1854 - Disposition ou montage des grilles ou des éléments chauffants pour appareils de chauffage d’air
F23K 5/00 - Alimentation en d'autres combustibles ou distribution d'autres combustibles pour les appareils à combustion
Cascaded Cold Climate Heat Pump systems (“CCCHP”) and methods are disclosed. A CCCHP provides efficiency improvements over traditional heat pump systems by utilizing a connected cascaded circuit configuration, to apportion compressor load of a heat pump circuit between two or more circuits. One embodiment that allows the CCCHP to achieve this efficiency improvement includes connecting multiple cold climate heat pump circuits through an intermediary heat exchange unit in a cascaded configuration, where energy is displaced from one refrigerant flow of a circuit into the refrigerant flow of another circuit. This allows each circuit to deploy a smaller compressor that operates within a narrower pressure and temperature range, than it otherwise would if it utilized a single larger compressor in a single circuit operating within a larger pressure range, which has a larger pressure differential between its initial state and its desired state causing inefficiency in the system.
F25B 7/00 - Machines, installations ou systèmes à compression fonctionnant en cascade, c.-à-d. avec plusieurs circuits, l'évaporateur d'un circuit refroidissant le condenseur du circuit suivant
F25B 30/02 - Pompes à chaleur du type à compression
F25B 41/20 - Disposition des soupapes, p. ex. de soupapes marche-arrêt ou de soupapes de régulation de débit
A furnace assembly has a fuel gas manifold connectable to a fuel gas supply that has fuel gas nozzles connectable to inshot burners. Each burner fires a flame and includes an air entrance section and a static air mixer including vanes with the mixer configured to fully mix the flow of fuel gas and the flow of ambient air flowing through the mixer into a fully mixed mixture. Each burner also includes a metal fiber mesh burner surface defines a surface where combustion of the fully mixed mixture occurs to create the flame. The furnace assembly also includes a heat exchanger in communication with the inshot burners and comprising tubes and a blower downstream of the heat exchanger and in fluid communication with the tubes and operable to create a negative pressure in the heat exchanger and pull the flows of fuel gas and ambient air into the burners.
A furnace assembly has a fuel gas manifold connectable to a fuel gas supply that has fuel gas nozzles connectable to inshot burners. Each burner fires a flame and includes an air entrance section and a static air mixer including vanes with the mixer configured to fully mix the flow of fuel gas and the flow of ambient air flowing through the mixer into a fully mixed mixture. Each burner also includes a metal fiber mesh burner surface defines a surface where combustion of the fully mixed mixture occurs to create the flame. The furnace assembly also includes a heat exchanger in communication with the inshot burners and comprising tubes and a blower downstream of the heat exchanger and in fluid communication with the tubes and operable to create a negative pressure in the heat exchanger and pull the flows of fuel gas and ambient air into the burners.
F24H 9/1881 - Disposition ou montage ou des éléments chauffants de combustion, p. ex. des grilles ou des brûleurs utilisant un combustible fluide
F24H 3/08 - Appareils de chauffage d'air à circulation forcée l'air étant maintenu séparé de l'agent chauffant, p. ex. par circulation forcée de l'air sur des radiateurs par tubes
F23C 3/00 - Appareils à combustion caractérisés par la forme de la chambre de combustion
F23D 14/08 - Brûleurs à gaz avec prémélangeurs, c.-à-d. dans lesquels le combustible gazeux est mélangé à l'air de combustion en amont de la zone de combustion du type à induction, p. ex. becs Bunsen avec les orifices de sortie disposés axialement dans la tête de brûleur
F23D 14/74 - Dispositifs de sécurité, p. ex. fonctionnant en cas d'interruption de l'alimentation en gaz pour éviter le décollage de flamme
A heating, ventilation, and air-conditioning system with a refrigeration circuit that includes a compressor fluidly, an outdoor heat exchanger fluidly connected downstream of the compressor, a cooling expansion valve fluidly connected downstream of the outdoor heat exchanger, an indoor heat exchanger fluidly connected downstream of the cooling expansion valve when operating in a cooling mode. A bypass line fluidly connects the circuit from a first location downstream of the outdoor heat exchanger and upstream of the cooling expansion valve to a second location downstream of the indoor heat exchanger and upstream of the compressor. Some of the refrigerant is flowable through the bypass line at the first location to bypass the cooling expansion valve and the indoor heat exchanger and recombinable with the refrigerant in the circuit at the second location to lower the compressor discharge temperature compared to not flowing the refrigerant through the first bypass line.
A heating, ventilation, and air-conditioning system with a refrigeration circuit that includes a compressor fluidly, an outdoor heat exchanger fluidly connected downstream of the compressor, a cooling expansion valve fluidly connected downstream of the outdoor heat exchanger, an indoor heat exchanger fluidly connected downstream of the cooling expansion valve when operating in a cooling mode. A bypass line fluidly connects the circuit from a first location downstream of the outdoor heat exchanger and upstream of the cooling expansion valve to a second location downstream of the indoor heat exchanger and upstream of the compressor. Some of the refrigerant is flowable through the bypass line at the first location to bypass the cooling expansion valve and the indoor heat exchanger and recombinable with the refrigerant in the circuit at the second location to lower the compressor discharge temperature compared to not flowing the refrigerant through the first bypass line.
Cascaded Cold Climate Heat Pump systems (“CCCHP”) and methods are disclosed. A CCCHP provides efficiency improvements over traditional heat pump systems by utilizing a connected cascaded circuit configuration, to apportion compressor load of a heat pump circuit between two or more circuits. One embodiment that allows the CCCHP to achieve this efficiency improvement includes connecting multiple cold climate heat pump circuits through an intermediary heat exchange unit in a cascaded configuration, where energy is displaced from one refrigerant flow of a circuit into the refrigerant flow of another circuit. This allows each circuit to deploy a smaller compressor that operates within a narrower pressure and temperature range, than it otherwise would if it utilized a single larger compressor in a single circuit operating within a larger pressure range, which has a larger pressure differential between its initial state and its desired state causing inefficiency in the system.
F25B 7/00 - Machines, installations ou systèmes à compression fonctionnant en cascade, c.-à-d. avec plusieurs circuits, l'évaporateur d'un circuit refroidissant le condenseur du circuit suivant
F25B 30/02 - Pompes à chaleur du type à compression
F25B 41/20 - Disposition des soupapes, p. ex. de soupapes marche-arrêt ou de soupapes de régulation de débit
Cascaded Cold Climate Heat Pump systems ("CCCHP") and methods are disclosed. A CCCHP provides efficiency improvements over traditional heat pump systems by utilizing a connected cascaded circuit configuration, to apportion compressor load of a heat pump circuit between two or more circuits. One embodiment that allows the CCCHP to achieve this efficiency improvement includes connecting multiple cold climate heat pump circuits through an intermediary heat exchange unit in a cascaded configuration, where energy is displaced from one refrigerant flow of a circuit into the refrigerant flow of another circuit. This allows each circuit to deploy a smaller compressor that operates within a narrower pressure and temperature range, than it otherwise would if it utilized a single larger compressor in a single circuit operating within a larger pressure range, which has a larger pressure differential between its initial state and its desired state causing inefficiency in the system.
F25B 7/00 - Machines, installations ou systèmes à compression fonctionnant en cascade, c.-à-d. avec plusieurs circuits, l'évaporateur d'un circuit refroidissant le condenseur du circuit suivant
F25B 13/00 - Machines, installations ou systèmes à compression, à cycle réversible
F25B 49/02 - Disposition ou montage des dispositifs de commande ou de sécurité pour machines, installations ou systèmes du type à compression
F25B 43/00 - Dispositions pour la séparation ou la purification des gaz ou des liquidesDispositions pour la vaporisation des résidus de fluides frigorigènes, p. ex. par la chaleur
A tie band with various locking methods is disclosed. The tie band can include a head and a band extending from the head. The head includes a first flange, a second flange, and a connector connecting the first flange and the second flange. The connector defines a hole in the head. The band includes two elongate faces, two side faces, and protrusions extending from the side faces. In some aspects, the band is fusible to the head by applying heat to the head, at least one of the protrusions, or a combination thereof when the portion of the band is inserted through the hole.
A tie band with various locking methods is disclosed. The tie band can include a head and a band extending from the head. The head includes a first flange, a second flange, and a connector connecting the first flange and the second flange. The connector defines a hole in the head. The band includes two elongate faces, two side faces, and protrusions extending from the side faces. In some aspects, the band is fusible to the head by applying heat to the head, at least one of the protrusions, or a combination thereof when the portion of the band is inserted through the hole.
A heating, ventilation, and air conditioning (HVAC) system and controller therefor to operate with thermal energy reservoirs are provided to set a four-way valve to route a refrigerant through a refrigerant circuit in a first direction when the HVAC system is set to a cooling mode or in a second direction, opposite to the first direction, when the HVAC system is set to a heating mode; and set bypass valves in the refrigerant circuit based on a temperature of a temperature holding material in a thermal energy reservoir and which of the heating mode and the cooling mode the four-way valve is set to, wherein the bypass valves route the refrigerant through the thermal energy reservoir to transfer thermal energy between the refrigerant and the temperature holding material.
F25B 30/06 - Pompes à chaleur caractérisées par la source de chaleur à faible potentiel
F25B 13/00 - Machines, installations ou systèmes à compression, à cycle réversible
F25B 49/02 - Disposition ou montage des dispositifs de commande ou de sécurité pour machines, installations ou systèmes du type à compression
F25B 41/20 - Disposition des soupapes, p. ex. de soupapes marche-arrêt ou de soupapes de régulation de débit
F28D 20/00 - Appareils ou ensembles fonctionnels d'accumulation de chaleur en généralAppareils échangeurs de chaleur de régénération non couverts par les groupes ou
A heating, ventilation, and air conditioning (HVAC) system and controller therefor to operate with thermal energy reservoirs is provided to set a four-way valve to route a refrigerant through a refrigerant circuit in a first direction when the HVAC system is set to a cooling mode or in a second direction, opposite to the first direction, when the HVAC system is set to a heating mode; and set bypass valves in the refrigerant circuit based on a temperature of a temperature holding material in a thermal energy reservoir and which of the heating mode and the cooling mode the four-way valve is set to, wherein the bypass valves route the refrigerant through the thermal energy reservoir to transfer thermal energy between the refrigerant and the temperature holding material.
The present disclosure relates to a heat pump heating, ventilation, and air conditioning (heat pump HVAC) system, and more particularly to a system operable to use a refrigerant to heat or cool an indoor space with a refrigerant circuit performing a reversible vapor compression cycle between an outdoor heat exchanger and an indoor heat exchanger. The heat pump HVAC system includes an ejector in fluid communication with the refrigerant circuit. The refrigerant circuit includes a first flow of refrigerant upstream from the outdoor heat exchanger and a second flow of refrigerant downstream from the outdoor heat exchanger; and the ejector is configurable to combine the first flow and the second flow into a combined flow, at least a portion of which is returned to the compressor.
F25B 30/02 - Pompes à chaleur du type à compression
F25B 13/00 - Machines, installations ou systèmes à compression, à cycle réversible
F25B 9/08 - Machines, installations ou systèmes à compression dans lesquels le fluide frigorigène est l'air ou un autre gaz à point d'ébullition peu élevé utilisant des éjecteurs
F25B 49/02 - Disposition ou montage des dispositifs de commande ou de sécurité pour machines, installations ou systèmes du type à compression
F25B 41/26 - Disposition des soupapes, p. ex. de soupapes marche-arrêt ou de soupapes de régulation de débit de soupapes d’inversion du flux de fluide
A heat pump heating, ventilation, and air conditioning (heat pump HVAC) system is operable to use a refrigerant to heat or cool an indoor space with a refrigerant circuit performing a reversible vapor compression cycle between an outdoor heat exchanger and an indoor heat exchanger. The heat pump HVAC system includes an ejector in fluid communication with the refrigerant circuit. The refrigerant circuit includes a first flow of refrigerant upstream from the outdoor heat exchanger and a second flow of refrigerant downstream from the outdoor heat exchanger; and the ejector is configurable to combine the first flow and the second flow into a combined flow, at least a portion of which is returned to the compressor.
A flame penetration resistant flexible duct and related devices and methods are disclosed. The flexible duct can include a tubular core, a vapor barrier, and an insulation assembly. The tubular core is configured to convey a fluid. The vapor barrier surrounds the tubular core. The insulation assembly is positioned between the tubular core and the vapor barrier. Further, the insulation assembly can include an insulation layer and a scrim layer bonded to the insulation layer. The scrim layer is configured to resist flame penetration of the flexible duct.
A flame penetration resistant flexible duct and related devices and methods are disclosed. The flexible duct can include a tubular core, a vapor barrier, and an insulation assembly. The tubular core is configured to convey a fluid. The vapor barrier surrounds the tubular core. The insulation assembly is positioned between the tubular core and the vapor barrier. Further, the insulation assembly can include an insulation layer and a scrim layer bonded to the insulation layer. The scrim layer is configured to resist flame penetration of the flexible duct.
The present disclosure relates to a HVAC system operable to use a refrigerant in a refrigerant circuit to heat or cool an indoor space and includes a defrost circuit connected to the refrigerant circuit. The defrost circuit includes a first three-way valve, a defrost line, a defrost passage in an outdoor heat exchanger, and a defrost return line. When the HVAC system is in a defrost mode, a four-way valve is operable to direct the refrigerant flow in a second direction through the outdoor heat exchanger. The first three-way valve is operable to divert some or all of the refrigerant from the refrigerant circuit and through the defrost circuit to defrost the outdoor heat exchanger. The defrost return line returns the diverted refrigerant to the refrigerant circuit upstream of an expansion device and downstream of the indoor heat exchange with respect to the second direction.
The present disclosure relates to a HVAC system operable to use a refrigerant in a refrigerant circuit to heat or cool an indoor space and includes a defrost circuit connected to the refrigerant circuit. The defrost circuit includes a first three-way valve, a defrost line, a defrost passage in an outdoor heat exchanger, and a defrost return line. When the HVAC system is in a defrost mode, a four-way valve is operable to direct the refrigerant flow in a second direction through the outdoor heat exchanger. The first three-way valve is operable to divert some or all of the refrigerant from the refrigerant circuit and through the defrost circuit to defrost the outdoor heat exchanger. The defrost return line returns the diverted refrigerant to the refrigerant circuit upstream of an expansion device and downstream of the indoor heat exchange with respect to the second direction.
