WO2021044873A1 - Climatiseur de véhicule - Google Patents

Climatiseur de véhicule Download PDF

Info

Publication number
WO2021044873A1
WO2021044873A1 PCT/JP2020/031569 JP2020031569W WO2021044873A1 WO 2021044873 A1 WO2021044873 A1 WO 2021044873A1 JP 2020031569 W JP2020031569 W JP 2020031569W WO 2021044873 A1 WO2021044873 A1 WO 2021044873A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
expansion valve
outdoor
radiator
heat exchanger
Prior art date
Application number
PCT/JP2020/031569
Other languages
English (en)
Japanese (ja)
Inventor
雄満 山崎
Original Assignee
サンデン・オートモーティブクライメイトシステム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by サンデン・オートモーティブクライメイトシステム株式会社 filed Critical サンデン・オートモーティブクライメイトシステム株式会社
Publication of WO2021044873A1 publication Critical patent/WO2021044873A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses

Definitions

  • the present invention relates to a heat pump type air conditioner for air-conditioning the interior of a vehicle.
  • a compressor that compresses and discharges the refrigerant
  • a radiator that is provided on the vehicle interior side to dissipate the refrigerant
  • a radiator that is provided on the vehicle interior side
  • a heat absorber that absorbs the refrigerant and an outdoor heat exchanger that is installed outside the vehicle interior to dissipate the refrigerant
  • an outdoor heat exchanger that absorbs the refrigerant and dissipates the heat
  • the refrigerant radiated in the radiator is decompressed by the outdoor expansion valve and then absorbed in the outdoor heat exchanger, and the refrigerant discharged from the compressor is radiated in the radiator and radiated in the radiator.
  • a dehumidifying heating mode in which the refrigerant is decompressed by the outdoor expansion valve and the indoor expansion valve and then absorbed by the heat absorber and the outdoor heat exchanger, and the refrigerant discharged from the compressor is dissipated by the radiator and the outdoor heat exchanger to expand the room.
  • the cooling (dehumidifying) capacity of the heat absorber is controlled by controlling the rotation speed of the compressor based on the temperature of the heat absorber. Further, the heating capacity of the radiator is controlled by controlling the valve opening degree of the outdoor expansion valve that reduces the pressure of the refrigerant flowing into the outdoor heat exchanger based on the temperature or pressure of the radiator (for example, patent). Reference 1).
  • the temperature of the radiator can be raised by reducing the valve opening of the outdoor expansion valve, but when the valve opening of the outdoor expansion valve is reduced, the amount of refrigerant circulating in the heat absorber decreases. Therefore, the temperature distribution of the endothermic device (the temperature varies depending on the part of the endothermic device) becomes large, the dehumidifying performance deteriorates, and it becomes difficult to establish the target blowing temperature. Therefore, in Patent Document 1, the temperature distribution of the heat absorber is prevented from occurring by changing the minimum valve opening degree in the control of the outdoor expansion valve in the dehumidifying / cooling mode based on the amount of ventilation to the heat absorber. It was.
  • the valve opening of the outdoor expansion valve is reduced (throttled)
  • the degree of supercooling of the refrigerant at the outlet of the radiator increases, and the heating capacity of the radiator also increases.
  • the valve opening of the outdoor expansion valve is reduced too much (if it is throttled too much)
  • the refrigerant will condense too much in the radiator, and the outdoor heat exchanger will exhibit the endothermic function instead of the heat dissipation function.
  • the endothermic capacity of the heat absorber is reduced, and the dehumidifying capacity of the dehumidifying / cooling mode is reduced.
  • the minimum control valve opening degree to be changed as described above also tends to increase in consideration of the individual variation of the outdoor expansion valve.
  • the setting with a predetermined margin will be made. Therefore, the heating capacity of the radiator (heat dissipation of the refrigerant) in the dehumidifying / cooling mode cannot be fully exerted, and an auxiliary heating device such as an electric heater must be heated to establish the target blowing temperature. It was.
  • the dehumidifying / cooling mode will be established even if the valve opening of the outdoor expansion valve is reduced. Since the valve opening was set, there was a problem that the heating capacity of the radiator could not be fully exerted.
  • the present invention has been made to solve the conventional technical problems, and to provide an air conditioner for a vehicle that can improve the air conditioning performance in the dehumidifying / cooling mode and contribute to energy saving.
  • the purpose is to provide an air conditioner for a vehicle that can improve the air conditioning performance in the dehumidifying / cooling mode and contribute to energy saving.
  • the vehicle air conditioner according to claim 1 is provided from a compressor that compresses the refrigerant, a radiator for radiating the refrigerant and heating the air supplied to the vehicle interior, and a radiator provided outside the vehicle interior.
  • An indoor expansion valve for controlling the inflow of the refrigerant into the heat absorber and a control device are provided, and at least the refrigerant discharged from the compressor is dissipated by the radiator and the outdoor heat exchanger by this control device.
  • the dehumidifying / cooling mode in which the radiated refrigerant is decompressed by the indoor expansion valve and then absorbed by the heat absorber is executed.
  • the control device determines the degree of overcooling of the refrigerant at the outlet of the radiator. It is characterized in that the valve opening degree of the outdoor expansion valve is controlled based on the SC and a predetermined target supercooling degree TGSC which is the target value thereof.
  • the valve opening degree of the outdoor expansion valve is reduced and the supercooling degree SC is increased.
  • the target supercooling degree TGSC is reached, the reduction of the valve opening degree of the outdoor expansion valve is stopped.
  • the control device sets predetermined upper limit values TGSCHiLim and lower limit value TGSCLoLim above and below the target supercooling degree TGSC, and the supercooling degree SC sets the target supercooling degree SC.
  • the vehicle air conditioner according to the fourth aspect is provided from a compressor for compressing the refrigerant, a radiator for radiating the refrigerant and heating the air supplied to the vehicle interior, and a radiator provided outside the vehicle interior.
  • An indoor expansion valve for controlling the inflow of the refrigerant into the heat absorber and a control device are provided, and at least the refrigerant discharged from the compressor is dissipated by the radiator and the outdoor heat exchanger by this control device.
  • the dehumidifying / cooling mode in which the radiated refrigerant is decompressed by the indoor expansion valve and then absorbed by the heat absorber is executed.
  • the control device uses the temperature TXO of the outdoor heat exchanger and the outside air. It is characterized in that the valve opening degree of the outdoor expansion valve is controlled based on the temperature Tam.
  • the control device opens the outdoor expansion valve when the temperature TXO of the outdoor heat exchanger is higher than the outside air temperature Tam or the outside air temperature Tam + a predetermined value ⁇ .
  • the temperature of the outdoor heat exchanger is reduced to the outside air temperature Tam or the outside air temperature Tam + a predetermined value ⁇ , the reduction of the valve opening degree of the outdoor expansion valve is stopped.
  • the control device sets a predetermined upper limit value TamHiLim and a lower limit value TamMoLim above and below the outside air temperature Tam or the outside air temperature Tam + the predetermined value ⁇ , and outdoors.
  • TamHiLim a predetermined upper limit value
  • TamMoLim a lower limit value
  • the temperature TXO of the outdoor heat exchanger is lowered to the outside air temperature Tam or the outside air temperature Tam + a predetermined value ⁇ .
  • the degree of supercooling SC of the refrigerant at the outlet of the radiator rises to the predetermined target degree of overcooling TGSC, which is the target value, the reduction of the valve opening degree of the outdoor expansion valve is stopped. ..
  • the control device sets predetermined upper limit values TGSCHiLim and lower limit value TGSCLoLim above and below the target supercooling degree TGSC, and the supercooling degree SC sets the target supercooling degree SC.
  • the vehicle air conditioner according to claim 9 is characterized in that, in each of the above inventions, the control device controls the valve opening degree of the indoor expansion valve in a direction in which the refrigerant discharged from the heat absorber is not superheated SH. To do.
  • the control device changes the valve opening degree of the indoor expansion valve in the opening direction when the refrigerant discharged from the heat absorber has a superheat degree SH. It is characterized by.
  • the control device adjusts the valve opening degree of the indoor expansion valve when the degree of superheat SH of the refrigerant discharged from the heat absorber becomes larger than the predetermined threshold value SH1.
  • the feature is to change in the opening direction.
  • the vehicle air conditioner according to the twelfth aspect of the present invention is characterized in that, in the ninth to eleventh aspects of the invention, the accumulator provided in the refrigerant circuit from the refrigerant outlet of the heat absorber to the refrigerant suction side of the compressor is provided. And.
  • a compressor for compressing the refrigerant a radiator for radiating the refrigerant and heating the air supplied to the vehicle interior, and a refrigerant provided outside the vehicle interior and emitted from the radiator are used.
  • An indoor expansion valve for controlling the inflow of the refrigerant into the vessel and a control device are provided, and at least the refrigerant discharged from the compressor is radiated by the radiator and the outdoor heat exchanger to dissipate the heat.
  • the control device determines the degree of supercooling SC of the refrigerant at the outlet of the radiator in the dehumidifying / cooling mode. Since the valve opening of the outdoor expansion valve is controlled based on the predetermined target supercooling degree TGSC, which is the target value, the target supercooling degree TGSC is set to an appropriate value so that the refrigerant does not condense too much in the radiator. By setting it, the valve opening of the outdoor expansion valve can be reduced and the heating capacity of the radiator can be maximized without considering the individual variation of the outdoor expansion valve while establishing the dehumidifying / cooling mode. It will be possible.
  • the need to generate heat in the auxiliary heating device is eliminated or suppressed, so that it is possible to contribute to energy saving while improving the air conditioning performance in the dehumidifying / cooling mode.
  • the valve opening degree of the outdoor expansion valve is reduced, and the supercooling degree SC is the target supercooling degree TGSC.
  • the reduction of the valve opening of the outdoor expansion valve is stopped.
  • a predetermined upper limit value TGSCHiLim and a lower limit value TGSCLoLim are set above and below the target supercooling degree TGSC, and after the supercooling degree SC becomes the target supercooling degree TGSC, the upper limit value TGSCHiLim
  • the valve opening of the outdoor expansion valve is increased to, the valve opening of the outdoor expansion valve is expanded, and when the supercooling degree SC is lowered to the lower limit value TGSCLoLim, the expansion of the valve opening of the outdoor expansion valve is stopped.
  • TGSCLoLim the expansion of the valve opening of the outdoor expansion valve
  • a compressor for compressing the refrigerant
  • a radiator for radiating the refrigerant and heating the air supplied to the vehicle interior
  • a radiator provided outside the vehicle interior and exiting the radiator.
  • An indoor expansion valve for controlling the inflow of the refrigerant into the heat absorber and a control device are provided, and at least the refrigerant discharged from the compressor is dissipated by the radiator and the outdoor heat exchanger to dissipate heat.
  • the control device controls the temperature TXO of the outdoor heat exchanger and the outside air in the dehumidifying / cooling mode. Since the valve opening degree of the outdoor expansion valve is controlled based on the temperature Tam, for example, as in the invention of claim 5, the temperature TXO of the outdoor heat exchanger is the outside air temperature Tam or the outside air temperature Tam +.
  • the valve opening of the outdoor expansion valve is reduced, and if the temperature TXO of the outdoor heat exchanger drops to the outside air temperature Tam or the outside air temperature Tam + the predetermined value ⁇ , the valve opening of the outdoor expansion valve.
  • the heat dissipation function of the outdoor heat exchanger in the dehumidifying and cooling mode is secured, and while the dehumidifying and cooling mode is established, the heating capacity of the radiator can be increased without considering the individual variation of the outdoor expansion valve. It will be possible to maximize it.
  • the need to generate heat in the auxiliary heating device is also eliminated or suppressed, so that it is possible to contribute to energy saving while improving the air conditioning performance in the dehumidifying / cooling mode.
  • the control device sets a predetermined upper limit value TamHiLim and a lower limit value TamMoLim above and below the outside air temperature Tam or the outside air temperature Tam + the predetermined value ⁇ , and the temperature of the outdoor heat exchanger.
  • TamHiLim a predetermined upper limit value
  • TamMoLim a lower limit value
  • control device supercools the refrigerant at the outlet of the radiator before the temperature TXO of the outdoor heat exchanger drops to the outside air temperature Tam or the outside air temperature Tam + a predetermined value ⁇ .
  • the cooling degree SC rises to a predetermined target supercooling degree TGSC, which is the target value, the reduction of the valve opening degree of the outdoor expansion valve is stopped.
  • a predetermined upper limit value TGSCHiLim and a lower limit value TGSCLoLim are set above and below the target supercooling degree TGSC, and after the supercooling degree SC becomes the target supercooling degree TGSC, the upper limit value TGSCHiLim If it rises to, the valve opening of the outdoor expansion valve is expanded, and if the supercooling degree SC drops to the lower limit value TGSCLoLim, the expansion of the valve opening of the outdoor expansion valve is stopped.
  • the supercooling degree TGSC By setting the supercooling degree TGSC to an appropriate value so that the refrigerant does not condense too much in the radiator, before the temperature TXO of the outdoor heat exchanger drops to the outside air temperature Tam or the outside air temperature Tam + the predetermined value ⁇ . , Stops the reduction of the valve opening of the outdoor expansion valve based on the refrigerant supercooling degree SC and the target supercooling degree TGSC at the outlet of the radiator, and then dehumidifies based on the supercooling degree SC and the target supercooling degree TGSC. It is possible to smoothly and accurately control the outdoor expansion valve that maximizes the heating capacity of the radiator in the cooling mode.
  • the dehumidifying and cooling mode is surely established based on the temperature TXO of the outdoor heat exchanger and the outside air temperature Tam, and the heating capacity of the radiator is maximized based on the supercooling degree SC and the target supercooling degree TGSC.
  • the outdoor expansion valve By controlling the outdoor expansion valve, it becomes possible to realize comfortable vehicle interior air conditioning.
  • the control device controls the valve opening degree of the indoor expansion valve in a direction in which the superheat degree SH is not attached to the refrigerant discharged from the heat absorber as in the invention of claim 9, the refrigerant discharged from the heat absorber can be used. Does not have the degree of superheat SH, or even if it does, it is extremely small. As a result, the refrigerant evaporates in the entire or substantially the entire heat absorber, and heat can be absorbed from the air supplied to the passenger compartment. Therefore, the inconvenience of temperature distribution in the heat absorber can be eliminated or suppressed. , It will be possible to effectively cool the passenger compartment. In addition, since the oil return is improved, the seizure of the compressor can be avoided in advance.
  • the control device has a degree of superheat SH attached to the refrigerant discharged from the heat absorber as in the invention of claim 2, the temperature distribution of the heat absorber is obtained by changing the valve opening degree of the indoor expansion valve in the opening direction. It becomes possible to effectively eliminate or suppress the occurrence of the occurrence of oil and the deterioration of oil return.
  • FIG. 1 It is a block diagram of one Example of the air conditioner for a vehicle to which this invention is applied (heating mode). It is a block diagram of the air-conditioning controller as a control device of the air conditioner for a vehicle of FIG. It is a figure explaining the dehumidifying heating mode by the air-conditioning controller of FIG. It is a figure explaining the dehumidifying cooling mode and the cooling mode by the air-conditioning controller of FIG. It is a figure explaining the vehicle cooling system cooling mode by the air-conditioning controller of FIG. It is a figure explaining the relationship between the valve opening degree of the outdoor expansion valve in a dehumidifying cooling mode, the heat dissipation amount of an outdoor heat exchanger, and the temperature distribution of a heat absorber.
  • FIG. 1 shows a configuration diagram of an air conditioner 1 for a vehicle according to an embodiment to which the present invention is applied.
  • the vehicle of the embodiment to which the present invention is applied is an electric vehicle (EV) without an engine (internal combustion engine), and the vehicle is equipped with a battery (for example, a lithium ion battery) to charge the battery from an external power source. It is driven and traveled by supplying the generated electric power to a traveling motor (electric motor).
  • the vehicle air conditioner 1 is also driven by being supplied with power from a battery.
  • the vehicle air conditioner 1 of the embodiment performs the heating mode by the heat pump device HP having the refrigerant circuit R in the electric vehicle that cannot be heated by the waste heat of the engine, and further, the dehumidifying heating mode, the dehumidifying cooling mode, and the cooling mode.
  • the interior of the vehicle is air-conditioned.
  • a vehicle cooling system cooling mode for cooling the vehicle cooling system 61 including the battery using a refrigerant is also executed as described later.
  • the present invention is effective not only for the electric vehicle as a vehicle but also for a so-called hybrid vehicle that uses an engine and an electric motor for traveling.
  • the vehicle air conditioner 1 of the embodiment air-conditions (heats, cools, dehumidifies, and ventilates) the interior of the electric vehicle, and is an electric compressor (powered from a battery to compress the refrigerant).
  • the electric compressor) 2 and the high-temperature and high-pressure refrigerant discharged from the compressor 2 are provided in the air flow passage 3 of the HVAC unit 10 through which the air inside the vehicle is ventilated and circulated, and flow in through the refrigerant pipe 13G and the strainer 55. It functions as a radiator 4 for radiating the refrigerant and heating the air supplied to the vehicle interior, an outdoor expansion valve 6 composed of an electric expansion valve, and a radiator (radiation function) for radiating the refrigerant during cooling.
  • Indoor expansion consisting of an outdoor heat exchanger 7 for exchanging heat between the refrigerant and the outside air so as to function as a heat absorber (heat absorption function) for absorbing the refrigerant during heating, and an electric expansion valve for decompressing and expanding the refrigerant.
  • the valve 8, the heat exchanger 9 provided in the air flow passage 3 for cooling the air supplied to the vehicle interior by absorbing heat from the outside of the vehicle interior to the refrigerant during cooling (during dehumidification), the accumulator 12 and the like are the refrigerants.
  • the refrigerant circuit R of the heat pump device HP is sequentially connected by the pipe 13.
  • the outdoor expansion valve 6 controls the inflow of the refrigerant into the outdoor heat exchanger 7, and the indoor expansion valve 8 controls the inflow of the refrigerant into the heat absorber 9.
  • the refrigerant is decompressed and expanded, and can be fully opened or fully closed. It is possible.
  • the outdoor heat exchanger 7 is provided with an outdoor blower 15.
  • the outdoor blower 15 forcibly ventilates the outdoor air to the outdoor heat exchanger 7 to exchange heat between the outside air and the refrigerant, whereby the outdoor air is outdoors even when the vehicle is stopped (that is, the vehicle speed is 0 km / h).
  • the heat exchanger 7 is configured to ventilate outside air.
  • the refrigerant pipe 13A connected to the refrigerant outlet side of the outdoor heat exchanger 7 is connected to the refrigerant pipe 13B via the check valve 18.
  • the check valve 18 has a forward direction on the refrigerant pipe 13B side, and the refrigerant pipe 13B is connected to the indoor expansion valve 8.
  • the refrigerant pipe 13E on the refrigerant outlet side of the radiator 4 is branched into the refrigerant pipe 13J and the refrigerant pipe 13F in front of the outdoor expansion valve 6 (on the refrigerant outlet side of the radiator 4 on the upstream side of the refrigerant), and one of the branches.
  • the refrigerant pipe 13J of the above is connected to the refrigerant inlet side of the outdoor heat exchanger 7 via the outdoor expansion valve 6.
  • the refrigerant pipe 13F is connected in parallel to the series circuit of the outdoor expansion valve 6, the outdoor heat exchanger 7, and the check valve 18, and the outdoor expansion valve 6, the outdoor heat exchanger 7, and the check valve are connected in parallel. It is a bypass circuit that bypasses 18.
  • each suction port of the outside air suction port and the inside air suction port is formed (represented by the suction port 25 in FIG. 1), and this suction port is formed.
  • the suction switching damper 26 for switching the air introduced into the air flow passage 3 into the inside air (inside air circulation), which is the air inside the vehicle interior, and the outside air (outside air introduction), which is the air outside the vehicle interior, is provided.
  • an indoor blower fan 27 for supplying the introduced inside air and outside air to the air flow passage 3 is provided on the air downstream side of the suction switching damper 26.
  • auxiliary heater 23 is an auxiliary heater as an auxiliary heating device.
  • the auxiliary heater 23 is composed of an electric heater such as a PTC heater, and is provided in the air flow passage 3 on the leeward side of the radiator 4 with respect to the air flow in the air flow passage 3 in the embodiment. .. Then, by energizing the auxiliary heater 23, the heating of the vehicle interior can be assisted.
  • the air (inside air or outside air) in the air flow passage 3 after flowing into the air flow passage 3 and passing through the heat absorber 9 is radiated.
  • An air mix damper 28 for adjusting the ratio of ventilation to the vessel 4 and the auxiliary heater 23 is provided.
  • FOOT (foot), VENT (vent), and DEF (diff) outlets are formed in the air flow passage 3 on the air downstream side of the radiator 4.
  • the outlet 29 is provided with an outlet switching damper 31 that switches and controls the blowing of air from each of the outlets.
  • the vehicle cooling system 61 includes vehicle-mounted equipment that requires cooling, such as a battery and a traveling motor, and is a system for cooling these vehicle-mounted equipment using a refrigerant.
  • the refrigerant pipe 13B located at the outlet of the refrigerant pipe 13F of the refrigerant circuit R, that is, the refrigerant downstream side of the connection portion between the refrigerant pipe 13F and the refrigerant pipe 13B and on the refrigerant upstream side of the indoor expansion valve 8.
  • One end of the branch pipe 72 is connected to.
  • the branch pipe 72 is provided with an auxiliary expansion valve 73 composed of an electric expansion valve.
  • the auxiliary expansion valve 73 decompresses and expands the refrigerant flowing from the branch pipe 72 into the vehicle cooling system 61, and can be fully closed.
  • one end of the refrigerant pipe 74 is connected to the vehicle cooling system 61, and the other end of the refrigerant pipe 74 is on the downstream side of the refrigerant of the check valve 20 and is connected to the refrigerant pipe 13C in front of the accumulator 12 (upstream side of the refrigerant). It is connected.
  • the auxiliary expansion valve 73 When the auxiliary expansion valve 73 is open, the refrigerant (part or all of the refrigerant) flowing through the refrigerant pipe 13B flows into the branch pipe 72, is depressurized by the auxiliary expansion valve 73, and then flows into the vehicle cooling system 61. , Evaporates there.
  • the refrigerant absorbs heat from the battery and the traveling motor in the process of flowing through the vehicle cooling system 61, cools them, and then is sucked into the compressor 2 through the refrigerant pipe 74 and the accumulator 12.
  • reference numeral 32 denotes an air conditioning controller 32 as a control device that controls the vehicle air conditioner 1.
  • the air conditioning controller 32 is composed of a microcomputer as an example of a computer including a processor.
  • the input of the air conditioning controller 32 (control device) is sucked into the air flow passage 3 from the outside air temperature sensor 33 that detects the outside air temperature (Tam) of the vehicle, the outside air humidity sensor 34 that detects the outside air humidity, and the suction port 25.
  • the HVAC suction temperature sensor 36 that detects the temperature of the air
  • the inside air temperature sensor 37 that detects the temperature of the air (inside air) in the vehicle interior
  • the inside air humidity sensor 38 that detects the humidity of the air inside the vehicle interior
  • the dioxide in the vehicle interior The HVAC suction temperature sensor 36 that detects the temperature of the air
  • inside air temperature sensor 37 that detects the temperature of the air (inside air) in the vehicle interior
  • the inside air humidity sensor 38 that detects the humidity of the air inside the vehicle interior
  • the indoor CO 2 concentration sensor 39 that detects the carbon concentration, the blowout temperature sensor 41 that detects the temperature of the air blown into the vehicle interior from the blowout port 29, and the discharge refrigerant pressure (discharge pressure Pd) of the compressor 2 are detected.
  • the heat absorber temperature sensor 48 that detects the temperature of the heat absorber 9 (heat absorber temperature Te), and the temperature (heat absorber outlet temperature Teout) and pressure (heat absorber pressure Pe) of the refrigerant emitted from the heat absorber 9 are detected.
  • a heat absorber outlet sensor 49 for example, a photosensor type solar radiation sensor 51 for detecting the amount of solar radiation into the vehicle interior, a vehicle speed sensor 52 for detecting the moving speed (vehicle speed) of the vehicle, a set temperature and air conditioning operation.
  • the air conditioning operation unit 53 for setting the switching, the outdoor heat exchanger outlet sensor 54 for detecting the temperature (outdoor heat exchanger temperature TXO) and pressure of the refrigerant emitted from the outdoor heat exchanger 7, and the auxiliary heater 23.
  • Each output of the auxiliary heater temperature sensor 76 that detects the temperature is connected.
  • the output of the air conditioning controller 32 includes the compressor 2, the outdoor blower 15, the indoor blower (blower fan) 27, the suction switching damper 26, the air mix damper 28, the air outlet switching damper 31, and the outdoor.
  • the expansion valve 6, the indoor expansion valve 8, the dehumidifying valve 22, the heating valve 21, each solenoid valve, the auxiliary expansion valve 73, and the auxiliary heater 23 are connected.
  • the air conditioning controller 32 controls these based on the output of each sensor and the settings input by the air conditioning operation unit 53.
  • the air conditioning controller 32 switches and executes each operation mode of the heating mode, the dehumidifying heating mode, the dehumidifying cooling mode, and the cooling mode, and cools the vehicle cooling system 61.
  • Execute the cooling mode operation mode.
  • an operation mode for air-conditioning the interior of the vehicle will be described.
  • FIG. 1 shows the flow of the refrigerant (solid arrow) in the refrigerant circuit R in the heating mode.
  • the air conditioning controller 32 auto mode
  • the air conditioning controller 32 has the heating valve 21 and the dehumidifying valve 22. Is opened, and the indoor expansion valve 8 is fully closed.
  • the outdoor expansion valve 6 and the auxiliary expansion valve 73 are opened to reduce the pressure and expand the refrigerant.
  • the compressor 2 and the blowers 15 and 27 are operated, and the air mix damper 28 is in a state of adjusting the ratio of the air blown from the indoor blower 27 to the radiator 4 and the auxiliary heater 23.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 2 flows into the radiator 4. Since the air in the air flow passage 3 is ventilated through the radiator 4, the air in the air flow passage 3 is heated by the high temperature refrigerant in the radiator 4, while the refrigerant in the radiator 4 heats the air. It is deprived, cooled, and condensed.
  • the low-temperature refrigerant leaving the outdoor heat exchanger 7 reaches the refrigerant pipe 13C via the refrigerant pipe 13A, the refrigerant pipe 13D, and the heating valve 21, and enters the accumulator 12 via the check valve 20 of the refrigerant pipe 13C.
  • the circulation in which the gas refrigerant is sucked into the compressor 2 is repeated.
  • the other refrigerant that has been split reaches the auxiliary expansion valve 73 via the dehumidifying valve 22, the refrigerant pipe 13F, and the refrigerant pipe 13B.
  • the refrigerant is depressurized, it flows into the vehicle cooling system 61 and evaporates there.
  • the refrigerant evaporated in the vehicle cooling system 61 repeats circulation that is sucked into the compressor 2 in sequence through the refrigerant pipes 74 and 13C and the accumulator 12. Since the air heated by the radiator 4 is blown out from the air outlet 29, the interior of the vehicle is heated by the heat pumped from the outside air and the waste heat of the battery and the traveling motor.
  • the air conditioning controller 32 calculates the target radiator pressure PCO (target value of the radiator pressure PCI) from the target heater temperature TCO (target value of the air temperature on the leeward side of the radiator 4) calculated from the target blowout temperature TAO described later. Then, the rotation speed of the compressor 2 is controlled based on the target radiator pressure PCO and the refrigerant pressure of the radiator 4 (radiator pressure PCI; high pressure side pressure of the refrigerant circuit R) detected by the radiator outlet sensor 47. ..
  • the air conditioning controller 32 controls the valve opening degree of the indoor expansion valve 8 so as to maintain the superheat degree SH of the refrigerant at the outlet of the heat absorber 9 at a predetermined value at the time of dehumidification and heating. Moisture in the air blown out from the indoor blower 27 by the endothermic action condenses and adheres to the heat absorber 9, so that the air is cooled and dehumidified. The remaining refrigerant that has been split and flows into the refrigerant pipe 13J is decompressed by the outdoor expansion valve 6 and then evaporated by the outdoor heat exchanger 7 to absorb heat from the outside air.
  • the refrigerant evaporated in the heat absorber 9 goes out to the refrigerant pipe 13C, merges with the refrigerant from the refrigerant pipe 13D (refrigerant from the outdoor heat exchanger 7), and then is sucked into the compressor 2 via the check valve 20 and the accumulator 12. Repeat the cycle.
  • the air dehumidified by the heat absorber 9 is reheated in the process of passing through the radiator 4, so that the dehumidifying and heating of the vehicle interior is performed.
  • the air conditioning controller 32 controls the rotation speed of the compressor 2 based on the target radiator pressure PCO calculated from the target heater temperature TCO and the radiator pressure PCI (high pressure of the refrigerant circuit R) detected by the radiator outlet sensor 47. At the same time, the valve opening degree of the outdoor expansion valve 6 is controlled based on the heat absorber temperature Te detected by the heat absorber temperature sensor 48.
  • the air conditioning controller 32 controls the valve opening degree of the outdoor expansion valve 6 as described later, so that the outdoor heat exchanger 7 dissipates heat (condensing function). Further, the indoor expansion valve 8 is opened to reduce the pressure and expand the refrigerant, and the heating valve 21 and the dehumidifying valve 22 are closed. Then, the compressor 2 and the blowers 15 and 27 are operated, and the air mix damper 28 adjusts the ratio of the air blown from the indoor blower 27 to the radiator 4 and the auxiliary heater 23.
  • the refrigerant leaving the radiator 4 reaches the outdoor expansion valve 6 via the refrigerant pipe 13E, and flows into the outdoor heat exchanger 7 via the outdoor expansion valve 6 controlled as described later.
  • the refrigerant flowing into the outdoor heat exchanger 7 is air-cooled by traveling there or by the outside air ventilated by the outdoor blower 15, and the refrigerant dissipates heat and condenses.
  • the refrigerant leaving the outdoor heat exchanger 7 enters the refrigerant pipe 13B via the refrigerant pipe 13A and the check valve 18, and reaches the indoor expansion valve 8.
  • the refrigerant is depressurized by controlling the valve opening degree as described later, and then flows into the heat absorber 9 and evaporates. Due to the endothermic action at this time, the moisture in the air blown out from the indoor blower 27 condenses and adheres to the heat absorber 9, and the air is cooled and dehumidified.
  • the refrigerant evaporated in the heat absorber 9 reaches the accumulator 12 via the refrigerant pipe 13C and the check valve 20, and is repeatedly sucked into the compressor 2 through the accumulator 12.
  • the air cooled by the heat absorber 9 and dehumidified is reheated in the process of passing through the radiator 4. As a result, the interior of the vehicle is dehumidified and cooled.
  • the air conditioning controller 32 controls the rotation speed of the compressor 2 based on the endothermic temperature Te detected by the endothermic temperature sensor 48, and as described in detail later, the outdoor expansion valve 6 and the indoor expansion valve.
  • the valve opening degree of 8 is controlled.
  • Cooling mode Next, the cooling mode will be described.
  • the air conditioning controller 32 has the same flow of refrigerant as the dehumidifying cooling mode (FIG. 4) described above, while the valve opening degree of the outdoor expansion valve 6 is fully opened.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 2 flows into the radiator 4.
  • the air in the air flow passage 3 is hardly ventilated to the radiator 4 and the auxiliary heater 23, or even when the air is ventilated, the ratio is small (because of only reheating during cooling).
  • the refrigerant that has dissipated heat for the reheat during cooling by the radiator 4 reaches the outdoor expansion valve 6 via the refrigerant pipe 13E.
  • the refrigerant passes through the outdoor expansion valve 6 as it is, passes through the refrigerant pipe 13J, flows into the outdoor heat exchanger 7, and travels there or by the outdoor blower 15. It is air-cooled by the ventilated outside air, and the refrigerant dissipates heat and becomes a condensed liquid.
  • the refrigerant evaporated in the heat absorber 9 reaches the accumulator 12 via the refrigerant pipe 13C and the check valve 20, and is repeatedly sucked into the compressor 2 through the accumulator 12.
  • the air cooled by the heat absorber 9 and dehumidified is blown out into the vehicle interior from the air outlet 29, so that the vehicle interior is cooled.
  • the air conditioning controller 32 controls the rotation speed of the compressor 2 based on the endothermic temperature Te detected by the endothermic temperature sensor 48.
  • the air conditioning controller 32 calculates the target blowout temperature TAO described above from the following formula (I).
  • This target outlet temperature TAO is a target value of the temperature of the air blown into the vehicle interior from the outlet 29.
  • TAO (Tset-Tin) x K + Tbal (f (Tset, SUN, Tam)) ⁇ ⁇ (I)
  • Tset is the set temperature in the vehicle interior set by the air conditioning operation unit 53
  • Tin is the temperature of the vehicle interior air detected by the inside air temperature sensor 37
  • K is a coefficient
  • Tbal is the set temperature Tset
  • the solar radiation sensor 51 detects it. It is a balance value calculated from the amount of solar radiation SUN and the outside air temperature Tam detected by the outside air temperature sensor 33.
  • the target blowing temperature TAO increases as the outside air temperature Tam decreases, and decreases as the outside air temperature Tam increases.
  • the air conditioning controller 32 selects one of the above operation modes based on the outside air temperature Tam detected by the outside air temperature sensor 33 and the target outlet temperature TAO at the time of activation. Further, after the start-up, each of the operation modes is selected and switched according to changes in the environment and setting conditions such as the outside air temperature Tam and the target blowout temperature TAO.
  • the air conditioning controller 32 executes the vehicle cooling system cooling mode when charging the battery with, for example, a quick charger or the like.
  • FIG. 5 shows how the refrigerant flows in the refrigerant circuit R (solid arrow) in this vehicle cooling system cooling mode.
  • the air conditioning controller 32 opens the auxiliary expansion valve 73 to reduce the pressure and expand the refrigerant, and the outdoor expansion valve 6 is set to all times. Further, the dehumidifying valve 22 and the heating valve 21 are closed, and the indoor expansion valve 8 is fully closed. Then, the compressor 2 is operated.
  • the air conditioning controller 32 cools the battery and the traveling motor of the vehicle cooling system 61 by controlling the rotation speed of the compressor 2 in response to a cooling request from the vehicle cooling system 61, for example. ..
  • the air-conditioning controller 32 of the embodiment basically controls the valve opening degree of the indoor expansion valve 8 in a direction in which the refrigerant discharged from the heat absorber 9 is not superheated SH, so that the temperature distribution does not occur in the heat absorber 9. To. In this case, for example, when the refrigerant discharged from the heat absorber 9 has a superheat degree SH, the air conditioning controller 32 changes the valve opening degree of the indoor expansion valve 8 in a predetermined pulse [PLS] in the opening direction.
  • PLS predetermined pulse
  • the degree of superheat SH is calculated. This method of calculating the degree of superheat SH is a well-known technique and will not be described here. Then, the valve opening degree of the indoor expansion valve 8 is controlled based on the superheat degree SH and the predetermined threshold value SH1.
  • the air conditioning controller 32 obtains, for example, information on the degree of superheat of the refrigerant discharged from the compressor 2 (calculated from the above-mentioned sensor information), and when the degree of superheat drops to a predetermined value, the valve of the indoor expansion valve 8 The opening shall be changed in a predetermined pulse and closing direction.
  • the air conditioning controller 32 controls the valve opening degree of the indoor expansion valve 8 in a direction in which the refrigerant discharged from the heat absorber 9 is not superheated SH, so that the refrigerant discharged from the heat absorber 9 is superheated SH. Is not attached, or even if it is attached, it will be extremely small. As a result, the refrigerant evaporates in the entire or substantially the entire heat absorber 9, and heat can be absorbed from the air supplied to the vehicle interior. Therefore, the inconvenience that the temperature distribution occurs in the heat absorber 9 is eliminated, or It will be possible to suppress and effectively cool the passenger compartment. Further, since the oil return is improved, the seizure of the compressor 2 can be avoided in advance.
  • the valve opening degree of the indoor expansion valve 8 can be changed in the opening direction. It becomes possible to effectively eliminate or suppress the occurrence of the temperature distribution and the deterioration of the oil return.
  • the air conditioning controller 32 opens the valve opening degree of the indoor expansion valve 8 when the superheat degree SH of the refrigerant discharged from the endothermic device 9 becomes larger than the predetermined threshold value SH1. Since the direction is changed, by setting this threshold value SH1 to an extremely small value, it is possible to appropriately eliminate or suppress the occurrence of the temperature distribution of the heat absorber 9 and the deterioration of the oil return. Will be.
  • the accumulator 12 is provided in the refrigerant circuit R from the refrigerant outlet of the heat absorber 9 to the refrigerant suction side of the compressor 2, the liquid back to the compressor 2 can be effectively eliminated. become.
  • FIG. 6 shows the valve opening ECCVohx [PLS] of the outdoor expansion valve 6 in the dehumidifying / cooling mode and the heat dissipation amount of the outdoor heat exchanger 7. And the relationship with the temperature distribution of the heat exchanger 9.
  • the valve opening ECCVohx of the outdoor expansion valve 6 is large, the outdoor heat exchanger 7 is in the heat dissipation function region where the refrigerant dissipates heat, and the larger the valve opening ECCVohx as shown by L4 in FIG.
  • the amount of heat radiated from the outdoor heat exchanger 7 also increases (on the right side when facing FIG. 6).
  • the valve opening ECCVohx of the outdoor expansion valve 6 becomes smaller, the amount of refrigerant circulating in the endothermic device 9 decreases by that amount, so that the refrigerant completely evaporates at an early stage when it flows into the endothermic device 9. Therefore, in the endothermic device 9, the temperature is low and high depending on the part, and the temperature distribution (temperature variation) is generated. As shown by L1 to L3 in FIG. 6, the valve opening ECCVohx of the outdoor expansion valve 6 is increased. The smaller the temperature, the larger the temperature distribution.
  • the broken lines L1 to L3 show the temperature distribution when the indoor expansion valve is used as a conventional mechanical expansion valve and the refrigerant discharged from the heat absorber 9 is superheated SH, and the solid lines L1 to L3 are the above-mentioned (7).
  • the temperature distribution when the refrigerant discharged from the endothermic device 9 is controlled without the superheat degree SH depending on the valve opening degree of the indoor expansion valve 8 is shown.
  • the superheat degree SH is large
  • the refrigerant evaporates faster, and therefore, regardless of the amount of ventilation, it is outdoors. From the stage where the valve opening degree ECCVohx of the expansion valve 6 is large, the temperature distribution of the heat absorber 9 becomes larger than the permissible value (permissible value of the heat absorber temperature distribution).
  • valve opening degree of the indoor expansion valve 8 is controlled by the air conditioning controller 32 in a direction in which the superheat degree SH is not attached to the refrigerant discharged from the heat exchanger 9, the valve opening degree ECCVohx of the outdoor expansion valve 6 is set. Even if it is reduced, as long as the outdoor heat exchanger 7 exerts the heat dissipation function (as long as it is in the outdoor heat exchanger heat dissipation function region), the temperature distribution of the heat exchanger 9 is hardly large, and the temperature distribution of the endothermic absorber 9 is not large. It can be seen that the value is smaller than the permissible value (solid lines L1 to L3 in FIG. 6).
  • the air conditioning controller 32 has a radiator outlet temperature TCIout detected by the radiator outlet sensor 47, a supercooling degree SC [K] of the refrigerant emitted from the radiator 4 obtained from the radiator pressure PCI, and a dehumidifying / cooling mode.
  • the valve opening degree ECCVohx [PLS] of the outdoor expansion valve 6 is controlled based on the target supercooling degree TGSC, which is the target value of the supercooling degree SC.
  • the target supercooling degree TGSC is set in the air conditioning controller 32.
  • This target supercooling degree TGSC is, for example, a value of a limit (the limit of the outdoor heat exchanger heat dissipation function region of FIG. 6) in which the refrigerant does not condense too much in the radiator 4 and the outdoor heat exchanger 7 can exert the heat dissipation function. It shall be obtained by experiment in advance.
  • the air conditioning controller 32 of the embodiment sets a predetermined upper limit value TGSCHiLim and a lower limit value TGSCLoLim above and below the target supercooling degree TGSC. Then, as shown at the left end of FIG. 7, when the supercooling degree SC of the refrigerant at the outlet of the radiator 4 is lower than the target supercooling degree TGSC, the valve opening degree ECCVohx of the outdoor expansion valve 6 is set to a predetermined pulse per predetermined time. Reduce at a rate.
  • the refrigerant stops for a longer time in the radiator 4, and as described above, the refrigerant eventually condenses and becomes supercooled in the radiator 4.
  • the degree of supercooling SC of the refrigerant at the outlet of the radiator 4 begins to increase.
  • the air conditioning controller 32 stops the reduction of the valve opening degree ECCVohx of the outdoor expansion valve 6.
  • the air conditioning controller 32 expands the valve opening ECCVohx of the outdoor expansion valve 6 at a predetermined pulse rate per predetermined time. As a result, the refrigerant flows out from the radiator 4 faster, so that the supercooling degree SC starts to decrease. Then, when the supercooling degree SC drops to the lower limit value TGSCLoLim at time t3, the air conditioning controller 32 stops the expansion of the valve opening degree ECCVohx of the outdoor expansion valve 6.
  • the valve opening ECCVohx at this point is the minimum valve opening of the outdoor expansion valve 6.
  • the valve opening degree of the outdoor expansion valve 6 is based on the supercooling degree SC of the refrigerant at the outlet of the radiator 4 and the predetermined target supercooling degree TGSC which is the target value thereof. Since the ECCVohx is controlled, the target supercooling degree TGSC is set to an appropriate value in the radiator 4 so that the refrigerant does not condense too much as in the embodiment, so that the dehumidifying and cooling mode can be established while outdoors. It is possible to reduce the valve opening degree ECCVohx of the outdoor expansion valve 5 and maximize the heating capacity of the radiator 4 without considering the individual variation of the expansion valve 6.
  • the need to generate heat of the auxiliary heater 23 is eliminated or suppressed, so that it is possible to contribute to energy saving while improving the air conditioning performance in the dehumidifying / cooling mode.
  • the valve opening ECCVohx of the outdoor expansion valve 6 is reduced, and the supercooling degree SC rises to the target supercooling degree TGSC. , Stops the reduction of the valve opening ECCVohx of the outdoor expansion valve 6. Then, when the supercooling degree SC reaches the target supercooling degree TGSC and then rises to the upper limit value TGSCHiLim, the valve opening ECCVohx of the outdoor expansion valve 6 is expanded, and the supercooling degree SC decreases to the lower limit value TGSCLoLim.
  • the radiator 4 Since the expansion of the valve opening ECCVohx of the outdoor expansion valve 6 is stopped, the radiator 4 is heated in the dehumidifying cooling mode based on the supercooling degree SC of the refrigerant at the outlet of the radiator 4 and the target supercooling degree TGSC. It is possible to smoothly and accurately control the outdoor expansion valve 6 that maximizes the capacity (heating capacity).
  • Control of the outdoor expansion valve 6 in the dehumidifying / cooling mode Part 2
  • the air conditioning controller 32 uses the temperature of the refrigerant emitted from the outdoor heat exchanger 7 detected by the outdoor heat exchanger outlet sensor 54 (outdoor heat exchanger temperature TXO [° C.]) and the outside air detected by the outdoor air temperature sensor 33.
  • the valve opening degree ECCVohx [PLS] of the outdoor expansion valve 6 is controlled based on the temperature Tam [° C.].
  • the air conditioning controller 32 determines the valve opening ECCVohx of the outdoor expansion valve 6 per predetermined time. It is reduced at the rate of the pulse. Since the predetermined value ⁇ is either a positive or negative value including zero, when the predetermined value ⁇ is zero, the outside air temperature Tam itself is obtained. That is, it is assumed that the outside air temperature Tam + the predetermined value ⁇ is any temperature near the outside air temperature Tam.
  • the refrigerant stops for a longer time in the radiator 4, and as described above, the refrigerant eventually condenses and becomes supercooled in the radiator 4.
  • the degree of supercooling SC of the refrigerant at the outlet of the radiator 4 begins to increase. Further, since the amount of the high-temperature refrigerant flowing into the outdoor heat exchanger 7 decreases, the outdoor heat exchanger temperature TXO also decreases.
  • the air conditioning controller 32 stops the reduction of the valve opening ECCVohx of the outdoor expansion valve 6. Further, in the air conditioning controller 32, a predetermined upper limit value TamHiLim and a predetermined lower limit value TamMoLim are set above and below the outside air temperature Tam + predetermined value ⁇ , and after the outdoor heat exchanger temperature TXO becomes the outside air temperature Tam + predetermined value ⁇ , the figure is shown in FIG. When the temperature drops to the lower limit TamMoLim at time t5 at 8, the air conditioning controller 32 expands the valve opening ECCVohx of the outdoor expansion valve 6 at a predetermined pulse rate per predetermined time.
  • the air conditioning controller 32 stops the expansion of the valve opening ECCVohx of the outdoor expansion valve 6.
  • the valve opening ECCVohx at this point is the minimum valve opening of the outdoor expansion valve 6.
  • the outdoor heat exchanger temperature TXO is maintained within the upper and lower limit values TamHiLim and TamMoLim of the outside air temperature Tam + the predetermined value ⁇ , so that the outdoor heat exchanger 7 reliably exhibits the heat dissipation function (FIG. 6).
  • the outdoor heat exchanger heat dissipation function region is maintained), and the valve opening degree ECCVohx of the outdoor expansion valve 6 is reduced as much as possible.
  • the air conditioning controller 32 controls the valve opening ECCVohx of the outdoor expansion valve 6 based on the outdoor heat exchanger temperature TXO and the outside air temperature Tam in the dehumidifying / cooling mode.
  • the valve opening ECCVohx of the outdoor expansion valve 6 is reduced to reduce the outdoor heat exchanger temperature.
  • the need to generate heat of the auxiliary heater 23 is also eliminated or suppressed, so that it is possible to contribute to energy saving while improving the air conditioning performance in the dehumidifying / cooling mode.
  • the air conditioning controller 32 sets the predetermined upper limit value TamHiLim and the lower limit value TamMoLim above and below the outside air temperature Tam + predetermined value ⁇ , and after the outdoor heat exchanger temperature TXO becomes the outside air temperature Tam + predetermined value ⁇ ,
  • the valve opening ECCVohx of the outdoor expansion valve 6 is expanded, and when the outdoor heat exchanger temperature TXO rises to the upper limit TamHiLim, the expansion of the valve opening ECCVohx of the outdoor expansion valve 6 is stopped.
  • the control of the outdoor expansion valve 6 that maximizes the heating capacity (heating capacity) of the radiator 4 in the dehumidifying / cooling mode can be smoothly and smoothly performed. It will be possible to realize it accurately.
  • the supercooling degree SC of the refrigerant at the outlet of the radiator 4 is set to the above-mentioned target supercooling degree TGSC (
  • the air conditioning controller 32 stops the reduction of the valve opening degree ECCVohx of the outdoor expansion valve 6 in the same manner as in the control of (9) described above.
  • the air conditioning controller 32 controls the outdoor expansion valve 6 in the same manner as in the above-mentioned control (9).
  • the supercooling degree SC drops to the lower limit value TGSCLoLim, the expansion of the valve opening degree ECCVohx of the outdoor expansion valve 6 is stopped.
  • the valve opening degree of the outdoor expansion valve 6 is based on the supercooling degree SC of the refrigerant at the outlet of the radiator 4 and the target supercooling degree TGSC.
  • the outdoor expansion valve 6 is controlled to maximize the heating capacity (heating capacity) of the radiator 4 in the dehumidifying / cooling mode based on the supercooling degree SC and the target supercooling degree TGSC. Let's go.
  • the dehumidifying and cooling mode is surely established based on the outdoor heat exchanger temperature TXO and the outside air temperature Tam, and the radiator 4 is based on the supercooling degree SC and the target supercooling degree TGSC.
  • the outdoor expansion valve 6 that maximizes the heating capacity (heating capacity), it becomes possible to realize comfortable vehicle interior air conditioning.
  • valve opening ECCVohx of the outdoor expansion valve 6 is reduced / expanded by the upper limit value TGSCiLim and the lower limit value TGSCLoLim of the supercooling degree SC and the target supercooling degree TGSC, but the target is not limited to this.
  • the valve opening degree ECCVohx of the outdoor expansion valve 6 may be controlled by so-called PID control based on the deviation e between the supercooling degree TGSC and the supercooling degree SC.
  • the configuration of the air conditioning controller 32 described in the examples, the configuration of the heat pump device HP of the vehicle air conditioner 1 and the configuration of the heat medium circulation circuit 61 are not limited to this, and are changed within a range that does not deviate from the gist of the present invention. It goes without saying that it is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

Le but de la présente invention est de fournir un climatiseur de véhicule qui améliore les performances de climatisation tout en étant dans un mode de déshumidification/ refroidissement et qui peut contribuer à économiser de l'énergie. Un dispositif de commande de climatisation (32) amène un fluide frigorigène déchargé depuis un compresseur (2) à dissiper la chaleur dans un radiateur (4) et un échangeur de chaleur extérieur (7) et exécute , après que le fluide frigorigène à partir duquel la chaleur a été dissipée est dépressurisé par une soupape d'expansion intérieure (8), un mode de déshumidification/ refroidissement dans lequel ledit fluide frigorigène est amené à absorber la chaleur dans un absorbeur de chaleur (9). Le dispositif de commande de climatisation (32) commande le degré d'ouverture d'une soupape d'expansion extérieure (6) dans le mode de déshumidification/ refroidissement sur la base du degré de sur-refroidissement SC du fluide frigorigène dans un orifice de décharge du radiateur (4) et d'un degré de sur-refroidissement cible TGSC qui est une valeur cible pour le degré de sur-refroidissement SC
PCT/JP2020/031569 2019-09-04 2020-08-21 Climatiseur de véhicule WO2021044873A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-161131 2019-09-04
JP2019161131A JP2021037876A (ja) 2019-09-04 2019-09-04 車両用空気調和装置

Publications (1)

Publication Number Publication Date
WO2021044873A1 true WO2021044873A1 (fr) 2021-03-11

Family

ID=74848847

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/031569 WO2021044873A1 (fr) 2019-09-04 2020-08-21 Climatiseur de véhicule

Country Status (2)

Country Link
JP (1) JP2021037876A (fr)
WO (1) WO2021044873A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012118198A1 (fr) * 2011-03-03 2012-09-07 サンデン株式会社 Climatiseur utilisable sur un véhicule
JP2014094677A (ja) * 2012-11-09 2014-05-22 Sanden Corp 車両用空気調和装置
JP2018077020A (ja) * 2016-11-11 2018-05-17 株式会社デンソー 冷凍サイクル装置
JP2019043423A (ja) * 2017-09-05 2019-03-22 サンデン・オートモーティブクライメイトシステム株式会社 車両用空気調和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012118198A1 (fr) * 2011-03-03 2012-09-07 サンデン株式会社 Climatiseur utilisable sur un véhicule
JP2014094677A (ja) * 2012-11-09 2014-05-22 Sanden Corp 車両用空気調和装置
JP2018077020A (ja) * 2016-11-11 2018-05-17 株式会社デンソー 冷凍サイクル装置
JP2019043423A (ja) * 2017-09-05 2019-03-22 サンデン・オートモーティブクライメイトシステム株式会社 車両用空気調和装置

Also Published As

Publication number Publication date
JP2021037876A (ja) 2021-03-11

Similar Documents

Publication Publication Date Title
JP7095848B2 (ja) 車両用空気調和装置
JP6855281B2 (ja) 車両用空気調和装置
CN110505968B (zh) 车辆用空气调和装置
CN111615464B (zh) 车用空调装置
WO2020031569A1 (fr) Dispositif de climatisation de véhicule
CN107735626B (zh) 车用空调装置
JP6963405B2 (ja) 車両用空気調和装置
JP6607638B2 (ja) 車両用空気調和装置
WO2019039153A1 (fr) Système de climatisation de véhicule
JP2019023023A (ja) 車両用空気調和装置
CN114126900B (zh) 车用空调设备
JP2017190075A (ja) 車両用空気調和装置
WO2019058826A1 (fr) Climatiseur de véhicule
WO2018116962A1 (fr) Dispositif de climatisation pour véhicule
WO2019181312A1 (fr) Climatiseur de véhicule
CN112384392A (zh) 车辆用空气调节装置
WO2021039614A1 (fr) Dispositif de refroidissement de batterie de véhicule et climatiseur de véhicule équipé de celui-ci
WO2021192760A1 (fr) Climatiseur de véhicule
WO2020235262A1 (fr) Climatiseur de véhicule
WO2021044873A1 (fr) Climatiseur de véhicule
WO2020179492A1 (fr) Climatiseur de véhicule
WO2020262125A1 (fr) Climatiseur de véhicule
WO2021054042A1 (fr) Climatiseur de véhicule

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20861023

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20861023

Country of ref document: EP

Kind code of ref document: A1