Abstract: An air conditioning device is provided. The air conditioning device comprises a fan and is provided on an underside of a seating surface of a vehicle seat. The fan comprises a case module and a restrictor. The case module comprises a first case and a second case. The first case is located at a side of the fan where the seating surface is located. The second case is located at a side of the fan opposite to the seating surface and is assembled to the first case. The restrictor is configured to restrict assembling of the first case and the second case to each other when an orientation of the second case with respect to the first case is different from a specified orientation.

Abstract: The invention relates to a drying module for drying humid air. The module comprises a humid air inflow opening, a dry air outflow opening and a flow channel extending between the inflow opening and the outflow opening. The flow channel includes a drying chamber for accommodating a zeolite container containing zeolite particles, wherein the drying chamber has at least one dimension transverse to a humid air flow direction that is significantly larger than a dimension of the drying chamber parallel to the flow direction of the humid air.

Abstract: A vehicle cooling system for cooling a vehicle battery may include a cabin cooling system having an electrical compressor arranged on a first refrigerant path and driven by a vehicle electrical system to cool a vehicle cabin, a battery cooling system having a mechanical compressor arranged on a second refrigerant path and driven by a vehicle engine, and a battery chiller in communication with both refrigerant paths and configured to cool coolant provided to a vehicle battery.

Abstract: A defrost airflow door assembly for a vehicle heating, ventilation, and air conditioning (HVAC) assembly. The defrost airflow door assembly includes a main defrost door defining a defrost bleed opening. The main defrost door is movable to control airflow through a windscreen defrost outlet of the HVAC assembly. A side defrost door is movable to control airflow through both the defrost bleed opening and a side window defrost outlet of the HVAC assembly.

Abstract: A supplemental heating subsystem is provided for a vehicle climate control system including an air flow control door. The supplemental heating subsystem includes a controller configured to control the supplemental heating subsystem, a supplemental heating element responsive to the controller and an actuator for positioning the door responsive to the controller. In operation, the position of the door is controlled to improve the operating efficiency of the supplemental heating element.

Abstract: An air flow control for a ventilation, heating, or air conditioning unit of a motor vehicle, having a housing with a cold air passage with a first inlet opening and with a hot air passage with a second inlet opening. At least one heating heat exchanger is disposed in the hot air passage in order to heat the air in the hot air passage with a mixing chamber for mixing a first partial air flow from the cold air passage and/or a second partial air flow from the hot air passage. The mixing chamber is disposed downstream of the hot air passage and of the cold air passage. A mixing flap substantially closes the first inlet opening. The housing downstream of the mixing chamber has a first outlet opening and at least one second outlet opening for the flowing of air out of the mixing chamber.

Abstract: A method for thermally conditioning a space adjacent a seat assembly includes activating a heating element positioned within the seat assembly beneath a seat covering. A fluid module that includes a fluid supply device and a thermoelectric element is activated to direct heated air from the fluid module to a space adjacent the seat assembly through a distribution system formed at least partially in the seat cushion. After a period of time, the heating element is deactivated.

Abstract: An HVAC module for a vehicle includes an upper airflow from an evaporator having an upper hot branch through a heater core and an upper cold branch that bypasses the heater core. A lower airflow from the evaporator has a lower hot branch through the heater core and a lower cold branch that bypasses the heater core. An upper barrel door is to select an upper blend setting of the upper airflow directed through the upper hot branch and through the upper cold branch. A lower barrel door is to select a lower blend setting of the lower airflow directed through the lower hot branch and through the lower cold branch. The upper hot branch and the lower hot branch are connected to a rear duct connected to an upper blend zone. The upper cold branch feeds the upper blend zone. The lower cold branch feeds the rear duct.

Abstract: A mechanical refrigeration and heating unit supplies filtered air that is heated or chilled as needed for one or more welding helmets. A portable or transportable cabinet or housing has an air inlet on which a cartridge air filter is mounted. The air passes through an evaporator coil into an evaporator plenum where an evaporator fan moves the air to an outlet that connects with a heater plenum that contains an electric heater module. An outlet of the heater if fitted with an outlet port to which an air hose may be connected. A compressor, condenser coil, receiver, and condenser fan are located in an equipment compartment in the housing. A control board in the unit allows the user to select heated or chilled air. A clogged-filter alarm provides visual and audio alarm signals when pressure in the evaporator plenum falls below a threshold.

Abstract: A vehicular HVAC system, includes: a battery circulation line including a battery radiator, a high-voltage battery, and a first valve, arranged to allow a first coolant to circulate therethrough; a branch line selectively connected to the circulation line through the valve and having a cooling heat exchanger configured to exchange heat with an indoor air conditioning refrigerant line; a battery heating line including a water heater, an indoor air conditioning heater core, and a second valve, arranged to allow a second coolant to circulate therethrough, the battery heating line being selectively connected to the circulation line through the second valve; and a controller configured to control the first valve in stages, to cool the high-voltage battery, to control the second valve and the water heater to selectively heat the battery, and to control the water heater or a cooling device on the refrigerant line to air condition the vehicle.

Abstract: An exemplary vehicle climate control operating method includes in a cooling mode, moving a valve to a first position and initializing the valve without moving the valve to a second position. In a heating mode, the method moves the valve to a second position and initializing the valve without moving the valve to the first position. The first position permits more flow than the second position.

Abstract: A vehicle air-conditioning unit has an air conditioning case and a case interior member. The air conditioning case defines a case passage in which air flows toward a vehicle compartment. The air conditioning case has a recess defining portion that is located in the case passage and defines a recessed portion. The case interior member has a guide portion and a cover. The guide portion guides the air flowing in the case passage. The cover is located in the recessed portion. The cover prevents the air, flowing in the case passage, from flowing into the recessed portion.

Abstract: Cabin air treatment apparatus for an agricultural machine, comprising at least an external air inlet (11, 16), a filtration system (20), an HVAC system (30), and a cabin air supply outlet (40). The apparatus further comprises a hermetically closed box (1) inside which the HVAC system (30) is housed, the box having a levelling opening (60) for placing the box (1) into communication with a cabin (C) of the agricultural machine to level a pressure inside the box (1) with a pressure inside the cabin (C), wherein said at least one external air inlet comprises a first external air inlet (11) formed on the box (1). The filtration system comprises a first filter (21) for effecting a filtration of at least one among dust, aerosols and vapours, arranged at the first air inlet (11), and a blower (22) for drawing air from the first air inlet (11) and delivering it to the HVAC system (30), said blower being arranged directly connected downstream of the first filter (21) and inside the box (1).

Abstract: A heating, ventilating, air conditioning (HVAC) system of a vehicle includes: a battery circulation line having a battery radiator, a main valve, a high voltage battery core, and a cooling heat exchanger so as to circulate a first coolant therethrough, with the cooling heat exchanger being provided to be heat-exchangeable with an indoor HVAC refrigerant line; a branch line including a water heating heater and selectively connected to the battery circulation line through the main valve; and a controller selectively cooling or heating the high voltage battery core by controlling an operation of the main valve, the water heating heater, and the indoor HVAC refrigerant line.

Abstract: A vehicle air-conditioning unit includes an air-conditioning case, a heater, and an opening-closing device. The air-conditioning case includes a first air passage, a second air passage and a third air passage provided in parallel with each other. The heater is provided in the third air passage and heating the air flowing in the third air passage. The opening-closing device opens and closes the third air passage on a downstream side of the heater. The third air passage includes an opening hole that is an opening end of the third air passage on an upstream side of the heater, and the air-conditioning case includes a hole separation portion dividing the opening hole of the third air passage into a plurality of separation holes.

Abstract: A vehicle having a heating and cooling system includes a refrigerant loop having first and second heat exchangers, and a coolant loop. The coolant loop is connected to allow a first flow of coolant to be directed through at least one of a plurality of air-to-coolant heat exchangers and at least one component for regulating a temperature of the at least component, and to allow a second flow of coolant to be directed through at least one other of the plurality of air-to-coolant heat exchangers and the at least one component for regulating the temperature of the at least one component dependent upon a mode of operation. A control module, control unit, controller, or the like commonly used in vehicles controls the first and second flows of coolant dependent upon the mode of operation.

Abstract: A heating, ventilation, and air conditioning (HVAC) assembly. The HVAC assembly includes a first shaft and a first airflow door movable by the first shaft. A second shaft and a second airflow door movable by the second shaft are also included. A case houses the first airflow door and the second airflow door. A cap is coupled to both the first shaft and the second shaft outside of the case. Rotation of the cap simultaneously rotates the first shaft and the second shaft.

Abstract: An air conditioner for a vehicle including a pump that takes in and discharges a heat medium, a heat medium/air heat exchanger which regulates a temperature of ventilation air by conducting sensible-heat exchange between the ventilation air and the heat medium circulated by the pump, a heat transfer device having a passage through which the heat medium flows and conducts heat transfer with the heat medium, a compressor, a heat medium/refrigerant heat exchanger which regulates the temperature of the heat medium, and a controller which regulates a heat transfer amount with the heat medium in the heat transfer device or heat exchange capability of the heat medium/air heat exchanger such that a temperature of the ventilation air regulated by the heat medium/air heat exchanger approaches a target temperature.

Abstract: A refrigerant circuit for a vehicle air conditioning system with heat pump function includes at least one evaporator, a compressor, and a condenser. The refrigerant circuit for the vehicle air conditioning system further includes an expansion element. A supplemental evaporator is arranged upstream from the compressor in a separate fluid guiding arrangement in the refrigerant circuit.

Abstract: A sun visor for a vehicle includes a visor panel carrying at least one fan or blower adapted to provide an airflow that is directionally adjustable independently of an orientation of the visor panel.

Abstract: There is disclosed a vehicle air-conditioning device in which a refrigerant subcool degree in a radiator is appropriately controlled, so that comfortable and efficient vehicle interior air conditioning is achievable. The vehicle air-conditioning device executes a heating mode in which a controller lets a refrigerant discharged from a compressor 2 radiate heat in a radiator 4, decompresses the refrigerant by which heat has been radiated by an outdoor expansion valve 6, and then lets the refrigerant absorb heat in an outdoor heat exchanger 7. In the heating mode, the vehicle air-conditioning device controls a refrigerant subcool degree SC of the radiator 4 by the outdoor expansion valve 6. On a basis of a radiator inlet air temperature THin that is a temperature of the air flowing into the radiator 4, the controller corrects a target subcool degree TGSC that is a target value of the refrigerant subcool degree SC in the radiator 4 in a lowering direction, as the radiator inlet air temperature THin rises.

Abstract: An apparatus is provided for removing gas from a vehicle storage unit. The apparatus includes at least one memory and a processor(s) detecting air being drawn, via an exhaust unit, from the front of a vehicle storage space to a rear of the vehicle storage space and through a ventilation unit forcing the air including emitted gas(es) to exit a top of the ventilation unit. The air is initially directed, from a supply unit in an upper part of the ventilation unit, into the rear of the vehicle storage space to the front of the vehicle storage space. The items emitted the gas. The computer program code may further cause the apparatus to measure the gas as the air passes through the ventilation unit to determine whether the measured gas equals or is below a predetermined threshold. Corresponding computer program products and methods are also provided.

Abstract: An air-conditioning system for conditioning air in a vehicle passenger compartment is configured to operate in a cooling system mode for cooling air to be supplied to the passenger compartment and in a heat pump mode for heating the same, and to operate in a reheating mode. The air-conditioning system includes a housing having a first flow channel and a second flow channel for guiding air to an air distribution system having discharge ports communicating with the passenger compartment, and a refrigerant circulation system having at least two heat exchangers. In this case, the first heat exchanger that operates as an evaporator regardless of operating modes is disposed in the first flow channel, and the second heat exchanger that operates as a condenser/gas cooler regardless of operating modes is disposed in the second flow channel.

Abstract: A vehicle air conditioner includes: a coolant-path coupled with a cooling-portion of a heat-generating component of a vehicle, for circulating a coolant; and a refrigerant-path for circulating a refrigerant. The conditioner further includes: a first water-refrigerant heat exchanger for vaporizing the refrigerant by thermal-exchange between the coolant and a low-temperature and low-pressure refrigerant; a second water-refrigerant heat exchanger for condensing the refrigerant by a thermal-exchange between the coolant and a high-temperature and high-pressure refrigerant; and a heater core for heating air to be blown into the vehicle's interior. The coolant-path includes: a branching-portion for causing a coolant's flow to branch off; a joining-portion for causing the branched flows to join; and first and second parts that branch off at the branching-portion and join at the joining-portion.

Abstract: A warewash machine includes a chamber for receiving wares, the chamber having at least one wash zone. A refrigerant circuit includes multiple condensers including a condenser to deliver refrigerant heat to incoming water that is being delivered into the machine. A primary flow path for incoming water passes through a waste heat recovery unit and a secondary flow path for incoming water bypasses the waste heat recovery unit. A valve is provided for selectively controlling whether refrigerant flows along the primary flow path or the secondary flow path based upon a subcooled condition of refrigerant in the refrigerant circuit.

Abstract: The compact low-profile air conditioner unit is configured to be installed through the roof of a truck cabin, and run off of electrical power. The vehicle air conditioner includes a compressor, a blower fan, and a housing assembly. The housing assembly includes a mounting base having a top side and an opposing bottom side. The mounting base is configured to be mounted to a roof of a vehicle. The compressor and the blower fan are each mounted to the mounting base. When installed to the roof of the vehicle via the mounting base, the compressor and the blower fan each extend at least partially through the roof of the vehicle.

Abstract: An evaporator set, preferably for a thermally driven adsorption device. In an evaporator set that can be connected an easily output-scalable modular thermally driven condenser set and, as a result, can be used simultaneously as a heat or cold store, a liquid collector is connected via a blockable expansion valve with an evaporator for cooling a fluid, wherein the liquid collector, the expansion valve and the evaporator form a structural unit, and wherein the liquid collector has a fluid inlet for and the evaporator a fluid outlet to a thermally driven condenser set.

Abstract: A heat medium discharge side of a first pump and a heat medium discharge side of a second pump are connected to a first switching valve in parallel. Heat medium inlet sides of the respective target devices for heat exchange included in a first target device group for heat exchange are connected to a first switching valve in parallel. The heat medium inlet side of the first pump and the heat medium inlet side of the second pump are connected to a second switching valve in parallel. The heat medium outlet sides of the respective target devices for heat exchange included in the first target device group for heat exchange are connected to the second switching valve in parallel. Furthermore, switching is performed between a state of circulation of the heat medium between the first pump and the target device, and a state of circulation of the heat medium between the second pump and the target device.

Abstract: The presently disclosed subject matter relates to enhanced dry-cooling systems and methods. More specifically, the presently disclosed subject matter relates to enhanced dry-cooling systems for increasing power plant efficiency and output. One embodiment of the present disclosure is directed to dry-cooling system for increasing power plant efficiency and output. The dry-cooling system comprises an air-cooled condenser and an air cooling system in fluid communication with the air-cooled condenser.

Abstract: An air passage opening and closing device has: a case defining an air passage; and a slide door provided with a door body that has a plate shape, the slide door slidably disposed in the case and opening or closing the air passage. The case is provided with a case-side sealing surface that is in contact with the door body when the slide door is located to close the air passage. The door body is provided with a rib that protrudes toward an upstream side in a flow direction of air and extends in a moving direction of the slide door.

Abstract: Agricultural machines such as sprayers can be improved by providing a control system configured to adjust an engine cooling package fan with variable speeds, to thereby minimize parasitic losses, based on progress of the HVAC system for attaining a desired temperature in the operator cab. In one aspect, as a gap between actual and desired temperatures (temperature differential) in the cab minimizes, the cooling package fan can be variably adjusted to increase or decrease in speed, depending on heating or cooling occurring in the cab, respectively. However, if a temperature of an area in the engine compartment reaches a predetermined threshold, such variable speed control can cease, and the cooling package fan can instead be controlled to cool the area.

Abstract: An air diffuser having a single air inlet has air outlets straddling a wall of a structure to distribute air to two or more rooms of the structure. The air diffuser includes an adjustable baffle that selectively directs air toward the first and second rooms. The air diffuser includes an acoustic dampener that prevents sound from moving through the air diffuser from one room to the next.

Abstract: A heat pump system for a vehicle may include a battery cooling line connected to a battery module and allowing a coolant to flow therein, a chiller connected to the battery cooling line through a first connection line and connected to a refrigerant line of an air conditioner device in which a refrigerant moves through a second connection line to selectively heat-exchange a refrigerant and a coolant introduced to the inside thereof to adjust a temperature of the coolant, an electric/electronic component cooling device electric/electronic component cooling device including a radiator and a first water pump connected through a cooling line to circulate a coolant to cool a motor and an electric/electronic component, and selectively connectable to the battery cooling line and the first connection line through a first valve, and an electronic expansion valve mounted at the second connection line between the refrigerant line and the chiller.

Abstract: A battery cooling system for a vehicle may include an air conditioning device including a compressor, a condenser, an evaporator, and a first expansion valve connected through a refrigerant line and circulating a refrigerant to cool the internal of the vehicle; a cooler including an electric device radiator and a first water pump connected with a cooling line and circulating coolant to cool a motor and an electric device; a battery module in which the coolant circulated therein through an operation of a second water pump provided on a battery cooling line, connected with the cooling line through the battery cooling line; and a chiller connected with the refrigerant line through a connection line, provided on the battery cooling line, and controlling a temperature of the coolant by heat-exchanging the coolant and the refrigerant selectively introduced thereinto.

Abstract: A heating system for a hybrid vehicle may include a first heating line connecting an engine, having a temperature which is controlled through water-cooling, to a heater core that is heated using a heat generated from the engine, a second heating line allowing for heat exchange between various electronic devices and an auxiliary radiator controlling the temperatures of the various electronic devices, a branch line connected to the first heating line and the second heating line and exchanging heat therebetween, a plurality of valves provided on each of the first heating line, the second heating line, and the branch line, and a controller controlling each valve.

Abstract: In a rotary door of a vehicular air conditioner, an outer peripheral portion closes a defroster blowing opening and another outer peripheral portion closes a foot blowing opening in a face mode. A first door opening communicates with an inlet opening and a second door opening communicates with a face blowing opening. A cross-sectional area of a flow path through which the airflow passes through the inlet opening and the first door opening is equal to a cross-sectional area of a flow path through which the airflow passes through the face blowing opening and the second door opening.

Abstract: An aircraft component assembly has a structural body and a thermal management de-icing system for minimizing or preventing ice build-up on leading edges of the body. The system includes a supply line for flowing heated fluid to the leading edges and a cooling device that interposes the supply line to prevent overheating of the leading edges thus protecting bodies that may be made of composite materials that are more susceptible to heat.

Abstract: The present disclosure provides a device for de-icing an air inlet lip of an aircraft nacelle. The device includes a pre-exchanger, an intake orifice of taking in low-pressure air downstream from a fan, and two high-pressure air intake orifices downstream from a compressor in addition to controlled valves and check valves installed in an air flow network. In particular, the pre-exchanger includes a low-pressure air outlet capable of opening into the air inlet lip of the aircraft nacelle via a pipe of the air flow network.

Abstract: Disclosed herein are battery systems for electric vehicles. An electric vehicle may include a first battery. The first battery may be configured to power various low voltage systems. For example, the first battery may provide the power to start the vehicle. The vehicle may include a second battery. The second battery may be configured to power one or more electric motors for propelling the vehicle. The first battery may supply power necessary to engage and/or access the power stored in the second battery. The first battery may include a heater to ensure that the first battery can supply ample power to initiate a start sequence in low temperatures.

Abstract: An air conditioner including a defrost vent, a face vent, floor vents and a console vent to discharge air. A console door adjusts the degree of opening of the console vent. A console air volume distribution means comprises a console slot which is formed on a mode cam and is connected with a rotary shaft of the console door to carry out cam motion. The console slot includes a closing slot part, an opening slot part and a middle slot part. The opening slot part, the middle slot part and the closing slot part are arranged such that the degree of opening of the console vent is reduced while an air discharge mode of the air conditioner is changed successively from a face mode to a bi-level mode, a floor mode, a mixing mode and a defrost mode.

Abstract: An airbag system is provided including an inflator mounted in a front compartment of a vehicle and a deployable or fixed chute that defines a passageway from the front compartment of the vehicle to a passenger compartment of the vehicle for an airbag cushion stored proximate the inflator to follow upon inflation of the airbag cushion.

Abstract: A climate control system for a vehicle interior, having a housing, a cooling device, and a heating device. At least one first flow channel, a second flow channel, and a third flow channel are disposed in the housing. A mixing chamber is disposed within the housing, which has at least one outflow opening, which is downstream of the mixing chamber in the flow direction. The flow channels are closable by a flap element, a third flow channel leads from the cooling device to the outflow opening while bypassing the mixing chamber, the flap element in the first flow channel and the flap element in the second flow channel are kinematically coupled and can be adjusted by a mutual control device. The flap element in the third flow channel is kinematically coupled to the other two flap elements or can be adjusted independently by a further control device.

Abstract: A temperature adjustment control device includes a heat diffusion layer, a heat flux sensor, and a temperature changing body provided in this order from a surface making contact with a human body. The heat flux sensor is disposed on the temperature changing body and outputs a sensor signal corresponding to a heat flux. The heat diffusion layer is disposed opposite to the temperature changing body through the heat flux sensor. The heat flux sensor outputs the sensor signal corresponding to the heat flux passing through the heat flux sensor in a direction in which the heat diffusion layer, the heat flux sensor, and the temperature changing body are arranged. A control portion controls a start and a stop of the power supply to the temperature changing body based on the sensor signal outputted from the heat flux sensor.

Abstract: A cooling aeraulics device is for cooling an element of a rail vehicle. The aeraulics device is designed to be placed on a roof of the rail vehicle and includes a conduit, which extends substantially longitudinally in relation to the rail vehicle. The conduit includes, successively, a front portion equipped with a front opening for the intake of air, a central portion, in which is housed the element to be cooled, and a rear portion, equipped with a rear opening for the discharge of exhaust air. A surface of a transverse cross-section of the conduit evolves, from the front opening to the rear opening, so as to generate an acceleration of the flow of air in the conduit through the Venturi effect.

Abstract: A system and method for controlling a transport heating, ventilation, and air conditioning (HVAC) system having a fresh air intake is disclosed. The fresh airflow intake system includes a fresh air damper configured to regulate a flow of fresh air into the transport HVAC system, an evaporator fan having at least a high-speed mode and a low speed mode, and a controller. The controller is configured to determine whether a fresh air condition is met and increase a fresh airflow in response to determining the fresh air condition is met. The controller is further configured to increase an evaporator fan speed when the fresh airflow is increased.

Abstract: A first fan is disposed in a first air passage, and a second fan is disposed in a second air passage. A partition wall that divides inside of a casing into the first air passage and the second air passage has an inclination part that is inclined toward the second fan as extending outward in a radial direction. The second fan has an end portion located adjacent to the first fan in a rotation axis direction and a projection part projected from the end portion outward in the radial direction. The inclination part is provided to cover the projection part across a clearance.

Abstract: Methods and systems for controlling condenser/radiator airflow in a TRS are provided. In particular, methods and systems are provided to control a fan speed of condenser fan(s) of a TRS based on a condenser/radiator performance parameter, a traveling speed of a refrigerated transport unit, and/or a compressor discharge pressure a compressor of the TRS. The fan speed of the condenser fan(s) can be increased when necessary to limit a negative impact on TRS performance caused by a static pressure at an outlet of the condenser fan(s) or under high ambient temperature conditions. The fan speed of the condenser fan(s) can be reduced to reduce noise levels generated by the TRS when the static pressure at the outlet of the condenser fan(s) does not negatively impact the performance of the TRS or when the refrigerated transport unit is not located in an area with a high ambient temperature.

Abstract: A vehicle includes an internal combustion engine (ICE) selectable between a running state and a non-running state. A thermoelectric generator (TEG) is in thermal contact with the ICE for converting thermal energy from the ICE to output electrical energy. The vehicle has an electric pump for circulating a liquid coolant through a coolant circuit. The electric pump is selectively powerable by the electrical energy output from the TEG. The coolant circuit is in fluid communication with the ICE, a radiator, and the TEG; and the TEG is downstream of the radiator in the coolant circuit.

Abstract: An operator station (100) for a work vehicle comprises a roof, a roof (102), that defines an outside air inlet (201); a floor (115); several windows (106) extending between the floor (115) and the roof (102) that together define in enclosed operator compartment; an operator seat (108) disposed within the operator compartment; an air-conditioning module (112) disposed adjacent to the floor (115); a first air conduit extending between an outside air inlet (201) and the air-conditioning module (112); and a second air conduit extending between the air-conditioning module (112) and a first conditioned air outlet of the roof (102).

Abstract: Methods and system for operating a heat pump in different operating modes and providing a predictable heat pump response when the heat pump is transitioned between the different operating modes are presented. In one example, a controller that includes executable instructions for providing a bumpless compressor command for operating the heat pump is disclosed.