WO2021049339A1 - 熱交換モジュール - Google Patents

熱交換モジュール Download PDF

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Publication number
WO2021049339A1
WO2021049339A1 PCT/JP2020/032807 JP2020032807W WO2021049339A1 WO 2021049339 A1 WO2021049339 A1 WO 2021049339A1 JP 2020032807 W JP2020032807 W JP 2020032807W WO 2021049339 A1 WO2021049339 A1 WO 2021049339A1
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WIPO (PCT)
Prior art keywords
heat exchange
air
cooling
exchange unit
side heat
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2020/032807
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English (en)
French (fr)
Japanese (ja)
Inventor
拓也 三ツ橋
バスミル ヤナルダウ
康太 真嶋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
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Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Publication of WO2021049339A1 publication Critical patent/WO2021049339A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • 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

Definitions

  • This disclosure relates to a heat exchange module.
  • Patent Document 1 Conventionally, there is a heat pump system described in Patent Document 1 below.
  • a compressor, an air-cooled condenser, an expansion means, and an evaporator are connected to a refrigerant circulation line.
  • This heat pump system includes an air conditioning case, a blower, and a water-cooled condenser.
  • air conditioning case a cold air passage and a hot air passage are formed inside the air conditioning case.
  • An evaporator is placed in the cold air passage.
  • An air-cooled condenser is placed in the hot air passage.
  • the blower is arranged in the air conditioning case and blows air into the cold air passage and the hot air passage.
  • Cooling water is supplied to the water-cooled condenser from a radiator arranged outside the air conditioning case.
  • the water-cooled condenser is arranged in a refrigerant circulation line between the compressor and the air-cooled condenser, and the refrigerant discharged from the compressor is heat-exchanged with the cooling water to be condensed.
  • An object of the present disclosure is to provide a heat exchange module capable of improving mountability while having a configuration having a cooling side heat exchange unit and an air conditioning side heat exchange unit.
  • the heat exchange module includes a cooling side heat exchange unit, an air conditioner side heat exchange unit, a blower, and a case.
  • cooling side heat exchange unit cooling water for cooling the heating element of the vehicle flows inside, and heat exchange is performed between the cooling water and the air.
  • air-conditioning side heat exchange unit the heat medium flows inside, and heat is exchanged between the air-conditioned air for air-conditioning the vehicle interior and the heat medium.
  • the blower blows air to the cooling side heat exchange section and the air conditioning side heat exchange section.
  • the case houses a cooling side heat exchange unit, an air conditioning side heat exchange unit, and a blower.
  • the cooling side heat exchange unit and the air conditioning side heat exchange unit are both arranged in the case, the cooling side heat exchange unit is arranged outside the case and the air conditioning side heat exchange unit is arranged inside the case. Compared with the configuration in which the parts are arranged, the mountability can be improved.
  • FIG. 1 is a diagram schematically showing the structure of the vehicle of the embodiment.
  • FIG. 2 is a perspective view schematically showing a perspective structure of the heat exchange module of the embodiment.
  • FIG. 3 is a diagram schematically showing the structure of the heat exchange module of the embodiment.
  • FIG. 4 is a block diagram showing a schematic configuration of the heat exchange system of the embodiment.
  • FIG. 5 is a block diagram showing an electrical configuration of the heat exchange system of the embodiment.
  • FIG. 6 is a block diagram showing an operation example of the heat exchange system in the heating element cooling mode of the embodiment.
  • FIG. 7 is a block diagram showing an operation example of the heat exchange module in the heating element cooling mode of the embodiment.
  • FIG. 8 is a block diagram showing an operation example of the heat exchange system in the heating element cooling / cooling mode of the embodiment.
  • FIG. 9 is a block diagram showing an operation example of the heat exchange module in the heating element cooling / cooling mode of the embodiment.
  • FIG. 10 is a block diagram showing an operation example of the heat exchange system in the heating mode of the embodiment.
  • FIG. 11 is a block diagram showing an operation example of the heat exchange module in the heating mode of the embodiment.
  • FIG. 12 is a block diagram showing an operation example of the heat exchange system in the frost formation suppression mode of the embodiment.
  • FIG. 13 is a block diagram showing an operation example of the heat exchange module in the frost formation suppression mode of the embodiment.
  • FIG. 14 is a diagram schematically showing the structure of the vehicle of the modified example.
  • FIG. 15 is a side view schematically showing the side structure of the heat exchange module of the modified example.
  • FIG. 16 is a diagram schematically showing the structure of the heat exchange module of another embodiment.
  • the heat exchange module 20 of this embodiment is arranged on the upper part of the bonnet 11 of the vehicle 10.
  • the vehicle 10 of the present embodiment is a so-called electric vehicle that travels by the power of a motor generator. Therefore, the vehicle is provided with a battery for supplying electric power to the motor generator, an inverter device for converting the DC electric power charged in the battery into AC electric power, and the like.
  • the traveling wind of the vehicle 10 is introduced into the heat exchange module 20 as outside air.
  • the heat exchange module 20 has a function as a radiator that dissipates cooling water for cooling a battery, an inverter device, and the like, and a function as a heat exchanger that generates conditioned air that air-conditions the vehicle interior. ..
  • the heat exchange module 20 includes a case 21, a cooling side heat exchange unit 22, a first blower 23, a first air conditioning side heat exchange unit 24, and a second air conditioning side heat exchange unit. 25 and a second blower 26 are provided.
  • the direction indicated by the arrow A in the figure indicates the flow direction of the outside air.
  • the direction indicated by the arrow Z1 indicates the upper direction in the vertical direction, and the direction indicated by the arrow Z2 indicates the lower direction in the vertical direction.
  • the case 21 is formed in a tubular shape.
  • An outside air introduction port 210 for introducing outside air from the bonnet 11 of the vehicle 10 is formed on the upper surface of one end of the case 21 on the upstream side of the outside air flow direction A.
  • the case 21 is formed with a partition wall 213 that divides the space inside the case 21 into a cooling passage 211 and an air conditioning passage 212.
  • the outside air introduced from the outside air introduction port 210 is introduced into each of the cooling passage 211 and the air conditioning passage 212.
  • a vehicle compartment outside communication port 214 for communicating the cooling passage 211 and the air conditioning passage 212 to the outside of the vehicle interior is formed on the upper surface of the other end of the case 21 on the downstream side of the outside air flow direction A.
  • the case 21 houses a cooling side heat exchange unit 22, an air conditioning side heat exchange unit 24, 25, and a blower device 23, 26.
  • the portion of the outside air introduction port 210 communicating with the cooling passage 211 is referred to as the "cooling side outside air introduction port 210a", and the portion communicating with the air conditioning passage 212 is referred to as the “air conditioning side outside air introduction port 210a”. It is called “210b”.
  • the portion communicating with the cooling passage 211 is referred to as “cooling side passenger compartment outside communication port 214a”
  • the portion communicating with the air conditioning passage 212 is referred to as "air conditioning side passenger compartment outside communication port 214b”. It is called.
  • cooling side vehicle interior communication port 215a the portion communicating with the cooling passage 211
  • air conditioning side vehicle interior communication port 215b the portion communicating with the air conditioning passage 212
  • the partition wall 213 is formed with a communication passage 216 that communicates the upstream portion of the cooling passage 211 and the upstream portion of the air conditioning passage 212.
  • the communication passage 216 makes it possible to circulate air between the cooling passage 211 and the air conditioning passage 212.
  • the cooling side heat exchange unit 22 and the first blower device 23 are arranged in the cooling passage 211.
  • the first blower device 23 is arranged on the downstream side of the cooling side heat exchange unit 22 in the outside air flow direction A. The first blower 23 blows the conditioned air flowing through the cooling passage 211 to the cooling side heat exchange unit 22. Cooling water is flowing inside the cooling side heat exchange unit 22.
  • This cooling water cools the heating element by circulating the heating element such as the motor generator, the battery, and the inverter device of the vehicle 10.
  • the cooling side heat exchange unit 22 mainly functions as a so-called radiator that radiates and cools the cooling water by exchanging heat between the cooling water flowing inside the cooling water and the conditioned air flowing outside the cooling water.
  • the first air-conditioning side heat exchange unit 24, the second air-conditioning side heat exchange unit 25, and the second air-conditioning device 26 are arranged in the air-conditioning passage 212.
  • the second air-conditioning device 26 is, for example, a sirocco fan, and blows air-conditioned air flowing through the air-conditioned passage 212 to the first air-conditioned side heat exchange unit 24 and the second air-conditioned side heat exchange unit 25.
  • the first air-conditioning side heat exchange unit 24 and the second air-conditioning side heat exchange unit 25 are arranged on the downstream side of the second air blower 26 in the outside air flow direction A.
  • the heat medium of the heat pump cycle used in the air conditioner of the vehicle 10 flows through the first air conditioner side heat exchange unit 24 and the second air conditioner side heat exchange unit 25.
  • the first air-conditioning side heat exchange unit 24 mainly functions as a so-called evaporator that cools the conditioned air by exchanging heat between the heat medium flowing inside the heat exchange unit and the conditioned air flowing outside the heat medium.
  • the second air-conditioning side heat exchange unit 25 is arranged on the downstream side of the first air-conditioning side heat exchange unit 24 in the outside air flow direction A.
  • the second air-conditioning side heat exchange unit 25 mainly functions as a so-called heater core that heats the conditioned air by exchanging heat between the heat medium flowing inside the heat medium and the conditioned air flowing outside the heat medium.
  • the first air-conditioning side heat exchange unit 24 and the second air-conditioning side heat exchange unit 25 correspond to the air-conditioning side heat exchange unit.
  • FIG. 3 is a diagram schematically showing the structure of the heat exchange module 20.
  • the heat exchange system 30 in which the heat exchange module 20 is used will be described in detail with reference to FIG.
  • the heat exchange system 30 includes a cooling system 40 for cooling the heating element 41 and an air conditioner for the vehicle 10 when the motor generator, battery, and inverter device of the vehicle 10 are used as the heating element 41.
  • the heat pump system 50 used in the above is provided.
  • the cooling system 40 has a heating element 41, a first hydrothermal medium heat exchange unit 61, and FIGS. 2 and 3 with respect to the cooling side heat exchange unit 22 of the heat exchange module 20 shown in FIGS. 2 and 3. It has a structure in which the second air-conditioning side heat exchange unit 25 of the heat exchange module 20 shown is connected in parallel.
  • cooling water circulates in the cooling side heat exchange unit 22, the heating element 41, the first hydrothermal medium heat exchange unit 61, and the second air conditioning side heat exchange unit 25.
  • cooling side heat exchange unit 22 and the heating element 41 are connected by an annular flow path W40.
  • a pump 42 is provided on the upstream side of the heating element 41 in the annular flow path W40.
  • the pump 42 circulates the cooling water in the annular flow path W40 by sucking and pumping the cooling water flowing through the annular flow path W40.
  • the cooling system 40 is provided with a first bypass flow path W41 so as to connect the upstream side portion and the downstream side portion of the cooling side heat exchange portion 22 in the annular flow path W40.
  • a second air-conditioning side heat exchange unit 25 is arranged in the first bypass flow path W41.
  • the second air-conditioning side heat exchange unit 25 is connected in parallel to the heating element 41 by the first bypass flow path W41.
  • Switching valves 450 and 451 such as a three-way valve for switching the connection state of the flow paths W40 and W41 are provided at two connecting portions between the annular flow path W40 and the first bypass flow path W41, respectively.
  • the cooling system 40 is provided with a second bypass flow path W42 so as to connect the upstream side portion and the downstream side portion of the second air conditioning side heat exchange unit 25 in the first bypass flow path W41.
  • the second bypass flow path W42 is provided with a first hydrothermal medium heat exchange section 61.
  • the first hydrothermal medium heat exchange unit 61 is connected in parallel to the heating element 41 and the second air conditioning side heat exchange unit 25 by the second bypass flow path W42.
  • the first hydrothermal medium heat exchange unit 61 is a portion that exchanges heat between the cooling water that circulates in the cooling system 40 and the heat medium that circulates in the heat pump system 50.
  • a pump 43 is provided in the second bypass flow path W42.
  • the pump 43 sucks and pumps the cooling water flowing through the second bypass flow path W42 to circulate the cooling water through the second bypass flow path W42.
  • Switching valves 452 and 453 such as a three-way valve for switching the connection state of the flow paths W41 and W42 are provided at two connection portions between the first bypass flow path W41 and the second bypass flow path W42, respectively. ..
  • the cooling system 40 is provided with a third bypass flow path W43 so as to connect a portion of the annular flow path W40 on the upstream side of the pump 42 and a portion on the downstream side of the heating element 41.
  • a pump 44 and a second hydrothermal medium heat exchange unit 62 are arranged in the third bypass flow path W43.
  • the second hydrothermal medium heat exchange unit 62 is a portion that exchanges heat between the cooling water that circulates in the cooling system 40 and the heat medium that circulates in the heat pump system 50.
  • the pump 44 circulates the cooling water in the third bypass flow path W43 by sucking and pumping the cooling water flowing through the third bypass flow path W43.
  • Switching valves 454 and 455 such as a three-way valve for switching the connection state of the flow paths W40 and W43 are provided at two connecting portions between the annular flow path W40 and the third bypass flow path W43, respectively.
  • the heating element 41 is cooled by circulating the cooling water cooled by the cooling side heat exchange unit 22 through the heating element 41. Further, in the cooling system 40, the cooling water is circulated between the cooling side heat exchange unit 22 and the hydrothermal medium heat exchange units 61 and 62 by switching the connection state of the flow path by the switching valves 450 to 455. It is also possible to circulate the cooling water between the heating element 41 and the hydrothermal medium heat exchange units 61 and 62.
  • the heat pump system 50 includes a first air conditioning side heat exchange unit 24, a pressure regulating valve 51, a compressor 52, a first expansion valve 53, a second expansion valve 54, a first hydrothermal medium heat exchange unit 61, and the like. It is provided with a second hydrothermal medium heat exchange unit 62.
  • the first air conditioning side heat exchange section 24, the pressure regulating valve 51, the compressor 52, the first hydrothermal medium heat exchange section 61, and the first expansion valve 53 are annularly connected by an annular flow path W50. A heat medium circulates in the annular flow path W50.
  • the compressor 52 sucks and compresses the heat medium flowing through the annular flow path W50 to discharge the high-temperature and high-pressure vapor-phase heat medium, and circulates the heat medium in the annular flow path W50.
  • the high-temperature and high-pressure vapor phase heat medium discharged from the compressor 52 flows into the first hydrothermal medium heat exchange section 61 through the annular flow path W50.
  • first hydrothermal medium heat exchange unit 61 heat exchange is performed between the high-temperature and high-pressure vapor-phase heat medium discharged from the compressor 52 and the cooling water circulating in the cooling system 40, so that the heat medium is heated. Heat is released into the cooling water and the heat medium condenses.
  • the high-pressure liquid-phase heat medium condensed in the first hydrothermal medium heat exchange section 61 flows into the first expansion valve 53 through the annular flow path W50.
  • the first expansion valve 53 expands and depressurizes the high-pressure liquid-phase heat medium discharged from the first hydrothermal medium heat exchange unit 61.
  • the low-pressure liquid-phase heat medium decompressed by the first expansion valve 53 flows into the first air-conditioning side heat exchange section 24 through the annular flow path W50.
  • heat is exchanged between the low-pressure liquid-phase heat medium discharged from the first expansion valve 53 and the conditioned air, so that the heat medium absorbs the heat of the conditioned air.
  • the conditioned air is cooled.
  • the low-temperature vapor-phase heat medium evaporated by absorbing the heat of the conditioned air flows from the first air-conditioned side heat exchange unit 24 to the pressure regulating valve 51 to adjust the pressure, and then is sucked into the compressor 52.
  • the heat pump system 50 when the heat medium circulates in the annular flow path W50, the heat pump system 50 operates as a so-called refrigeration cycle for cooling the conditioned air.
  • the heat pump system 50 is provided with a bypass flow path W51 so as to connect a portion of the annular flow path W50 on the downstream side of the first hydrothermal medium heat exchange portion 61 and a portion on the upstream side of the compressor 52. ..
  • the bypass flow path W51 is provided with a second expansion valve 54 and a second hydrothermal medium heat exchange section 62.
  • Switching valves 550 and 551 such as a three-way valve for switching the connection state of the flow paths W50 and W51 are provided at two connecting portions between the annular flow path W50 and the bypass flow path W51.
  • the switching valves 550 and 551 form, for example, a flow path in which the heat medium does not flow in the bypass flow path W51 and the heat medium flows only in the annular flow path W50.
  • the heat pump system 50 can be driven as a refrigeration cycle as described above.
  • the heat medium does not flow through the first expansion valve 53 and the first air conditioning side heat exchange section 24, and the compressor 52, the first hydrothermal medium heat exchange section 61, and the bypass flow path W51 A flow path through which the heat medium flows is constructed.
  • the second expansion valve 54 expands and depressurizes the high-pressure liquid-phase heat medium discharged from the first hydrothermal medium heat exchange unit 61.
  • the low-pressure liquid-phase heat medium decompressed by the second expansion valve 54 flows into the second hydrothermal medium heat exchange section 62 through the bypass flow path W51.
  • the second hydrothermal medium heat exchange unit 62 heat is exchanged between the low-pressure liquid-phase heat medium discharged from the second expansion valve 54 and the cooling water flowing through the third bypass flow path W43 of the cooling system 40. By doing so, the heat of the cooling water is absorbed by the heat medium. The low-pressure vapor-phase heat medium evaporated by absorbing the heat of the cooling water is sucked into the compressor 52.
  • the compressor 52 sucks and compresses the low-pressure gas phase heat medium discharged from the second hydrothermal medium heat exchange unit 62, thereby discharging the high-temperature and high-pressure gas phase heat medium.
  • the high-temperature and high-pressure vapor phase heat medium discharged from the compressor 52 flows into the first hydrothermal medium heat exchange section 61.
  • heat exchange is performed between the high-temperature and high-pressure vapor-phase heat medium discharged from the compressor 52 and the cooling water flowing through the second bypass flow path W42 of the cooling system 40.
  • the heat of the heat medium is absorbed by the cooling water.
  • the heat pump system 50 can both cool and heat the conditioned air.
  • the heat exchange system 30 includes a control device 70 that controls each of the systems 40 and 50.
  • the control device 70 is mainly composed of a microcomputer having a CPU, a memory, and the like.
  • the control device 70 executes various processes for controlling the systems 40 and 50 by executing a program stored in the memory in advance.
  • the control device 70 incorporates the output signals of the temperature sensors 71 and 72 and the operation unit 73.
  • the temperature sensor 71 detects the temperature of the heating element 41 and outputs a signal corresponding to the detected temperature of the heating element 41 to the control device 70.
  • the temperature sensor 72 detects the temperature of the cooling side heat exchange unit 22, and outputs a signal corresponding to the detected temperature of the cooling side heat exchange unit 22 to the control device 70.
  • the operation unit 73 is a part operated by the occupant of the vehicle 10.
  • the operation unit 73 can perform, for example, an operation of selecting whether to heat or cool the vehicle interior, an operation of selecting a set temperature of the vehicle interior, and the like.
  • the operation unit 73 outputs a signal corresponding to the operation of the occupant to the control device 70.
  • the cooling system 40 is provided with door members 460 to 462.
  • the door members 460 to 462 open and close the cooling side outside air introduction port 210a, the cooling side vehicle interior communication port 214a, and the cooling side vehicle interior communication port 215a of the cooling passage 211 shown in FIGS. 2 and 3, respectively.
  • the heat pump system 50 is provided with door members 560 to 562.
  • the door members 560 to 562 open and close the air-conditioning side outside air introduction port 210b, the air-conditioning side vehicle interior communication port 214b, and the air-conditioning side vehicle interior communication port 215b of the air conditioning passage 212 shown in FIGS. 2 and 3, respectively.
  • the heat exchange system 30 is provided with a door member 31 for opening and closing the communication passage 216 shown in FIGS. 2 and 3.
  • the door members 460 to 462, 560 to 562, 31 are components of the heat exchange module 20.
  • the control device 70 is cooled by the output signals of the temperature sensors 71 and 72 and the operation unit 73 according to the temperature of the heating element 41, the temperature of the cooling side heat exchange unit 22, the operation of the occupant on the operation unit 73, and the like. It controls each component of the system 40, each component of the heat pump system 50, and the door member 31. As a result, the control device 70 drives each of the systems 40 and 50 in any of the heating element cooling mode, the heating element cooling / cooling mode, the heating mode, and the frost formation suppression mode.
  • FIGS. 6, 8, 10, and 12 the flow path through which the cooling water or the heat medium is flowing is shown by a solid line, and the flow path through which the cooling water or the heat medium is not flowing is shown by a broken line.
  • FIGS. 7, 9, 11, and 13 the closed portion of the outside air introduction port 210, the vehicle interior outside communication port 214, the vehicle interior communication port 215, and the communication passage 216 is point hatched. Is illustrated in. Further, in FIGS. 7, 9, 11, and 13, the air flow direction is indicated by an arrow.
  • the heating element cooling mode is a mode for cooling the heating element 41.
  • the control device 70 operates the systems 40 and 50 in the heating element cooling mode based on the temperature of the heating element 41 becoming equal to or higher than a predetermined temperature.
  • a cooling water flow path and a heat medium flow path are formed in each of the systems 40 and 50 as shown in FIG.
  • cooling water flows through the heating element 41, the cooling side heat exchange unit 22, and the second air conditioning side heat exchange unit 25, and the first hydrothermal medium heat exchange unit 61 and
  • the open / closed state of the switching valves 450 to 455 is switched so that the cooling water does not flow to the second hydrothermal medium heat exchange unit 62.
  • the control device 70 drives the pump 42 and stops the pump 43. Further, the control device 70 does not circulate the heat medium in the heat pump system 50 by stopping the compressor 52 of the heat pump system 50.
  • the cooling side outside air introduction port 210a, the air conditioning side outside air introduction port 210b, the cooling side vehicle room outside communication port 214a, and the air conditioning side vehicle room outside communication port 214b are opened. Further, each door member 460 to 462, 560 to 562, 31 is controlled so that the cooling side vehicle interior communication port 215a, the air conditioning side vehicle interior communication port 215b, and the communication passage 216 are closed. Further, the control device 70 drives the blowers 23 and 26. As a result, in the cooling passage 211, the outside air introduced from the cooling side outside air introduction port 210a passes through the cooling side heat exchange unit 22, and then is discharged to the outside of the vehicle interior from the cooling side vehicle interior outside communication port 214a.
  • the outside air introduced from the air-conditioning side outside air introduction port 210b passes through the second air-conditioning side heat exchange unit 25, and then is discharged to the outside of the vehicle interior from the air-conditioning side vehicle interior outdoor communication port 214b.
  • the cooling side heat exchange unit 22 exchanges heat between the cooling water flowing inside the cooling water and the outside air flowing through the cooling passage 211. , The cooling water is cooled. Further, in the second air-conditioning side heat exchange unit 25, the cooling water is cooled by heat exchange between the cooling water flowing inside the second air-conditioning side heat exchange unit 25 and the outside air flowing through the air-conditioning passage 212. Utilizing this, in the heating element cooling mode, as shown in FIG. 6, the cooling water that has absorbed the heat of the heating element 41 is flowed not only to the cooling side heat exchange unit 22 but also to the second air conditioning side heat exchange unit 25.
  • the cooling water is dissipated by both the cooling side heat exchange unit 22 and the second air conditioning side heat exchange unit 25. That is, in the heating element cooling mode, if the cooling side heat exchange unit 22 is the first radiator, the second air conditioning side heat exchange unit 25 functions as the second radiator. As a result, the amount of heat radiated from the cooling side heat exchange unit 22 can be reduced as compared with the case where the cooling water is radiated only by the cooling side heat exchange unit 22, so that the cooling side heat exchange unit 22 is downsized. Alternatively, it is possible to reduce the number of portions of the cooling side heat exchange unit 22 where heat exchange is performed. In the cooling system 40, the heating element 41 is cooled by the cooling water cooled by the cooling side heat exchange unit 22 and the second air conditioning side heat exchange unit 25 circulating in the heating element 41.
  • the heating element cooling mode is a mode in which only the heating element 41 is cooled.
  • the heating element cooling / cooling mode is a mode for cooling the heating element 41 and the interior of the vehicle.
  • the control device 70 sets the systems 40 and 50 in the heating element cooling / cooling mode when the temperature of the heating element 41 is equal to or higher than a predetermined temperature and the cooling of the vehicle interior is selected by the operation unit 73. Make it work.
  • each system 40, 50 may be operated in the heating element cooling / cooling mode.
  • the flow paths of the cooling water and the heat medium as shown in FIG. 8 are formed in each of the systems 40 and 50.
  • cooling water flows through the heating element 41, the cooling side heat exchange unit 22, the first hydrothermal medium heat exchange unit 61, and the second air conditioning side heat exchange unit 25, and the cooling water flows to the second. 2
  • the open / closed state of the switching valves 450 to 455 is switched so that the cooling water does not flow to the hydrothermal medium heat exchange unit 62.
  • the control device 70 drives the pumps 42 and 43 of the cooling system 40.
  • the heat medium flows through the compressor 52, the first hydrothermal medium heat exchange unit 61, the first expansion valve 53, the first air conditioning side heat exchange unit 24, and the pressure regulating valve 51, and the second water.
  • the open / closed states of the switching valves 550 and 551 are switched so that the heat medium does not flow through the heat medium heat exchange unit 62, and the compressor 52 is driven.
  • the control device 70 includes a cooling side outside air introduction port 210a, an air conditioning side outside air introduction port 210b, a cooling side vehicle compartment outside communication port 214a, an air conditioning side vehicle interior communication port 214b, and an air conditioning side vehicle interior.
  • Each door member 460 to 462, 560 to 562, 31 is controlled so that the communication port 215b is in the open state and the cooling side vehicle interior communication port 215a and the communication passage 216 are in the closed state. Further, the control device 70 drives the blowers 23 and 26.
  • the outside air introduced from the cooling side outside air introduction port 210a passes through the cooling side heat exchange unit 22, and then is discharged to the outside of the vehicle interior from the cooling side vehicle interior outside communication port 214a.
  • the air-conditioning passage 212 after the outside air introduced from the air-conditioning side outside air introduction port 210b passes through the first air-conditioning side heat exchange unit 24 and the second air-conditioning side heat exchange unit 25, the air-conditioning side vehicle interior communication port 214b and air conditioning It is discharged to the inside of the vehicle and the outside of the vehicle from the side vehicle interior communication port 215b, respectively.
  • the cooling side heat exchange unit 22 exchanges heat between the cooling water flowing inside the cooling water and the outside air flowing through the cooling passage 211.
  • the cooling water is cooled.
  • the cooling water is cooled by heat exchange between the cooling water flowing inside the second air-conditioning side heat exchange unit 25 and the outside air flowing through the air-conditioning passage 212.
  • the cooling water that has absorbed the heat of the heating element 41 flows to the cooling side heat exchange section 22 and the second air conditioning side heat exchange section 25, so that the cooling side heat is generated. Cooling water is dissipated by both the exchange unit 22 and the second air conditioning side heat exchange unit 25.
  • the cooling side heat exchange unit 22 if used as the first radiator, the second air conditioning side heat exchange unit 25 functions as the second radiator.
  • the cooling water cooled by the cooling side heat exchange unit 22 and the second air conditioning side heat exchange unit 25 circulates in the heating element 41, so that the heating element 41 can be cooled.
  • the cooling water cooled in the cooling side heat exchange unit 22 and the second air conditioning side heat exchange unit 25 flows to the first hydrothermal medium heat exchange unit 61.
  • the first hydrothermal medium heat exchange unit 61 heat exchange is performed between the high-temperature and high-pressure vapor-phase heat medium compressed by the compressor 52 and the cooling water, so that the heat of the heat medium is absorbed by the cooling water. And the heat medium condenses.
  • the first hydrothermal medium heat exchange unit 61 substantially functions as a capacitor.
  • the high-pressure liquid-phase heat medium condensed in the first hydrothermal medium heat exchange unit 61 becomes a low-pressure liquid-phase heat medium by being depressurized through the first expansion valve 53, and then becomes the low-pressure liquid-phase heat exchange unit 24.
  • the first air-conditioning side heat exchange unit 24 heat is exchanged between the low-pressure liquid-phase heat medium flowing inside the heat exchange unit 24 and the outside air flowing through the air-conditioning passage 212, so that the outside air is exchanged. It is cooled.
  • the first air conditioning side heat exchange unit 24 functions as an evaporator.
  • the outside air cooled by the first air-conditioning side heat exchange unit 24 is introduced into the vehicle interior as air-conditioning air through the air-conditioning side vehicle interior communication port 215b to cool the vehicle interior. Therefore, the heat pump system 50 operates as a refrigeration cycle.
  • the heating element cooling / cooling mode is a mode in which both the heating element 41 is cooled and the passenger compartment is cooled.
  • the heating mode is a mode for heating the interior of the vehicle.
  • the control device 70 operates the systems 40 and 50 in the heating mode when the operation unit 73 selects heating in the vehicle interior.
  • each system 40, 50 may be operated in the heating element cooling / cooling mode.
  • the heating mode the flow paths of the cooling water and the heat medium as shown in FIG. 10 are formed in each of the systems 40 and 50.
  • the cooling water circulates between the cooling side heat exchange unit 22 and the second hydrothermal medium heat exchange unit 62, and the control device 70 and the first hydrothermal medium heat exchange unit 61
  • the open / closed state of the switching valves 450 to 455 is switched so that the cooling water circulates with the second air conditioning side heat exchange unit 25.
  • the control device 70 drives the pumps 42 and 43 of the cooling system 40.
  • the heat medium flows through the compressor 52, the first hydrothermal medium heat exchange unit 61, the second expansion valve 54, and the second hydrothermal medium heat exchange unit 62, and the first air conditioning side heat exchange unit
  • the open / closed states of the switching valves 550 and 551 are switched so that the heat medium does not flow through the 24, and the compressor 52 is driven.
  • the cooling side vehicle interior communication port 215a, the air conditioning side vehicle interior communication port 215b, and the communication passage 216 are in an open state, and the cooling side outside air introduction port 210a and the air conditioning side.
  • Each door member 460 to 462, 560 to 562, 31 is controlled so that the outside air introduction port 210b, the cooling side vehicle interior outside communication port 214a, and the air conditioning side vehicle interior outside communication port 214b are closed.
  • the control device 70 stops the first blower device 23 and drives the second blower device 26.
  • the air in the vehicle interior introduced from the cooling side vehicle interior communication port 215a passes through the cooling passage 211, the communication passage 216, and the air conditioning passage 212 in this order, and then flows from the air conditioning side vehicle interior communication port 215b into the vehicle interior. become.
  • the control device 70 may drive the first blower 23.
  • the air inside the vehicle is referred to as "inside air”.
  • the cooling side heat exchange unit 22 By forming the air flow as shown in FIG. 11, in the cooling side heat exchange unit 22, heat exchange is performed between the cooling water flowing inside the cooling water and the inside air flowing through the cooling passage 211. , The heat of the inside air is absorbed by the cooling water.
  • the cooling water that has absorbed the heat of the inside air flows to the second hydrothermal medium heat exchange unit 62 as shown in FIG.
  • a low-pressure liquid-phase heat medium decompressed by the second expansion valve 54 flows through the second hydrothermal medium heat exchange unit 62.
  • the liquid phase heat medium absorbs the heat of the cooling water by performing heat exchange between the cooling water that has absorbed the heat of the inside air and the low pressure liquid phase heat medium. And evaporate. Therefore, in the heat pump system 50, the second hydrothermal medium heat exchange unit 62 substantially functions as an evaporator.
  • the low-pressure gas phase heat medium evaporated in the second hydrothermal medium heat exchange unit 62 becomes a high-temperature and high-pressure gas phase heat medium by being compressed by the compressor 52, and then the first It flows into the hydrothermal medium heat exchange unit 61.
  • the first hydrothermal medium heat exchange unit 61 heat exchange is performed between the high-temperature and high-pressure vapor-phase heat medium compressed by the compressor 52 and the cooling water, so that the heat of the heat medium is absorbed by the cooling water.
  • the first hydrothermal medium heat exchange unit 61 substantially functions as a capacitor.
  • the cooling water heated by absorbing the heat of the heat medium flows to the second air conditioning side heat exchange unit 25. As shown in FIG.
  • the inside air is heated by heat exchange between the inside air flowing through the air-conditioning passage 212 and the cooling water. Therefore, the second air-conditioned heat exchange unit 25 functions as a heater core for heating the conditioned air.
  • the inside air heated in the second air-conditioning side heat exchange unit 25 flows into the vehicle interior through the air-conditioning side vehicle interior communication port 215b, so that the vehicle interior can be heated.
  • the heating mode is a mode for heating the interior of the vehicle.
  • the frost formation suppression mode is a mode for preventing frost from adhering to the cooling side heat exchange unit 22 when operating in the heating mode.
  • the control device 70 monitors the temperature of the cooling side heat exchange unit 22 by the temperature sensor 72 when operating in the heating mode, and the temperature of the cooling side heat exchange unit 22 becomes equal to or lower than the first predetermined temperature. Based on this, the mode shifts from the heating mode to the frost formation suppression mode.
  • the first predetermined temperature is set to a temperature slightly higher than the temperature at which frost actually adheres to the cooling side heat exchange unit 22.
  • control device 70 executes the frost formation suppression mode based on the temperature of the cooling side heat exchange unit 22 becoming higher than the second predetermined temperature, or executes the frost formation suppression mode for a predetermined time.
  • the mode shifts from the frost formation suppression mode to the heating mode based on the above.
  • the second predetermined temperature is a temperature higher than the first predetermined temperature.
  • the frost formation suppression mode is executed when the possibility of frost adhering to the cooling side heat exchange unit 22 becomes high during the execution of the heating mode.
  • the frost formation suppression mode the flow paths of the cooling water and the heat medium as shown in FIG. 12 are formed in each of the systems 40 and 50.
  • the cooling water circulates between the heating element 41 and the cooling side heat exchange unit 22, and the first hydrothermal medium heat exchange unit 61 and the second air conditioning side heat exchange unit 21.
  • the open / closed state of the switching valves 450 to 455 is switched so that the cooling water circulates with the portion 25.
  • the control device 70 drives the pumps 42 and 43 of the cooling system 40.
  • the heat medium flows through the compressor 52, the first hydrothermal medium heat exchange unit 61, the first expansion valve 53, the first air conditioning side heat exchange unit 24, and the pressure regulating valve 51, and the second water.
  • the open / closed states of the switching valves 550 and 551 are switched so that the heat medium does not flow through the heat medium heat exchange unit 62, and the compressor 52 is driven.
  • the cooling side vehicle interior communication port 215a, the air conditioning side vehicle interior communication port 215b, and the communication passage 216 are opened, and the cooling side outside air introduction port 210a and the air conditioning side outside air are opened.
  • Each door member 460 to 462, 560 to 562, 31 is controlled so that the introduction port 210b, the cooling side vehicle room outside communication port 214a, and the air conditioning side vehicle room outside communication port 214b are closed.
  • the control device 70 stops the first blower device 23 and drives the second blower device 26.
  • the air in the vehicle interior introduced from the cooling side vehicle interior communication port 215a passes through the cooling passage 211, the communication passage 216, and the air conditioning passage 212 in this order, and then flows from the air conditioning side vehicle interior communication port 215b into the vehicle interior. become. If the first blower 23 is reversible, the control device 70 may drive the first blower 23.
  • the cooling water circulates between the heating element 41 and the cooling side heat exchange section 22, so that the cooling water that has absorbed the heat of the heating element 41 flows to the cooling side heat exchange section 22.
  • the temperature of the cooling side heat exchange unit 22 can be raised. Therefore, adhesion of frost to the cooling side heat exchange unit 22 is prevented.
  • a low-pressure liquid-phase heat medium decompressed by the first expansion valve 53 flows through the first air-conditioning side heat exchange unit 24.
  • heat is exchanged between the low-pressure liquid-phase heat medium flowing inside the heat exchange unit 24 and the inside air flowing through the air-conditioning passage 212, whereby the heat medium is generated. Absorbs the heat of the inside air and evaporates. Therefore, in the frost formation suppression mode, the first air conditioning side heat exchange unit 24 substantially functions as an evaporator.
  • the low-pressure vapor-phase heat medium evaporated in the first air-conditioning side heat exchange section 24 flows to the compressor 52 through the pressure regulating valve 51, and is compressed by the compressor 52 to obtain high temperature and high pressure. After becoming a vapor phase heat medium, it flows into the first hydrothermal medium heat exchange section 61.
  • the first hydrothermal medium heat exchange unit 61 heat exchange is performed between the high-temperature and high-pressure vapor-phase heat medium compressed by the compressor 52 and the cooling water, so that the heat of the heat medium is absorbed by the cooling water.
  • the first hydrothermal medium heat exchange unit 61 substantially functions as a capacitor.
  • the cooling water heated by absorbing the heat of the heat medium flows to the second air conditioning side heat exchange unit 25.
  • the inside air is heated by heat exchange between the inside air flowing through the air-conditioning passage 212 and the cooling water. Therefore, the second air-conditioned heat exchange unit 25 functions as a heater core for heating the conditioned air.
  • the inside air heated in the second air-conditioning side heat exchange unit 25 flows into the vehicle interior through the air-conditioning side vehicle interior communication port 215b, so that the vehicle interior can be heated.
  • the frost formation suppression mode is a mode in which frost formation of the cooling side heat exchange unit 22 is prevented while heating the interior of the vehicle. According to the heat exchange module 20 of the present embodiment described above, the actions and effects shown in the following (1) to (9) can be obtained.
  • the case 21 of the heat exchange module 20 is formed with a common outside air introduction port 210 for introducing outside air into the cooling side heat exchange unit 22 and the air conditioning side heat exchange units 24 and 25.
  • the cooling side heat exchange unit 22 and the air conditioning side heat exchange units 24 and 25 are both arranged in the case 21, the cooling side heat exchange unit 22 is arranged outside the case 21 and the case.
  • the mountability can be improved.
  • the case 21 is formed with an outside air introduction port 210 common to the cooling side heat exchange unit 22 and the air conditioning side heat exchange units 24 and 25, the cooling side heat exchange unit 22 and the air conditioning side heat exchange unit 24, Compared with a configuration in which the outside air inlets corresponding to each of the 25 are separately provided, the mountability can be improved.
  • the cooling passage 211 that guides the outside air introduced from the outside air introduction port 210 to the cooling side heat exchange unit 22, and the outside air introduced from the outside air introduction port 210 to the air conditioning side heat exchange units 24 and 25.
  • An air conditioning passage 212 for guiding is provided. According to this configuration, the air flowing through the cooling passage 211 and the air flowing through the air conditioning passage 212 are not mixed, so that the heat exchange performance of the cooling side heat exchange unit 22 and the air conditioning side heat exchange units 24 and 25 deteriorates. Can be suppressed.
  • the cooling passage 211 and the air conditioning passage 212 are integrally formed. According to this configuration, the mountability can be improved as compared with the case where the cooling passage 211 and the air conditioning passage 212 are provided separately.
  • the passenger compartment outside communication port 214 is provided in the cooling passage 211 on the downstream side of the cooling side heat exchange unit 22 and on the downstream side of the air conditioning side heat exchange units 24 and 25 in the air conditioning passage 212. It is formed.
  • the external communication port 214 functions as an exhaust port for discharging the air that has passed through the cooling side heat exchange unit 22 and the air conditioning side heat exchange units 24 and 25 to the outside of the vehicle interior, which is a place different from the vehicle interior. According to this configuration, not only the cooling side heat exchange unit 22 but also the air conditioning side heat exchange units 24 and 25 can function as radiators.
  • a communication passage for communicating the portion of the cooling passage 211 upstream of the cooling side heat exchange portion 22 and the portion of the air conditioning passage 212 upstream of the air conditioning side heat exchange portions 24 and 25. 216 is formed.
  • the communication passage 216 corresponds to the communication portion. According to this configuration, it is possible to form an air flow as shown in FIGS. 11 and 13, so that the interior of the vehicle can be heated. Further, since the cooling side heat exchange unit 22 can absorb heat from the inside air, the heat absorption efficiency of the cooling side heat exchange unit 22 can be improved as compared with the case where the cooling side heat exchange unit 22 absorbs heat from the outside air which is lower than the inside air. Further, by increasing the endothermic efficiency of the cooling side heat exchange unit 22, the time until the cooling side heat exchange unit 22 is frosted can be extended.
  • the heat exchange module 20 further includes a door member 31 that opens and closes the communication passage 216.
  • the door member 31 corresponds to an opening / closing portion that opens / closes the communication portion.
  • the air-conditioning side heat exchange unit includes a first air-conditioning side heat exchange unit 24 that functions as an evaporator and a second air-conditioning side heat exchange unit 25 that functions as a heater core. According to this configuration, it is possible to selectively cool and heat the vehicle interior.
  • Blowers 23 and 26 are arranged in the cooling passage 211 and the air conditioning passage 212, respectively. According to this configuration, it is possible to control the air volume of each of the cooling passage 211 and the air conditioning passage 212.
  • the outside air introduction port 210 is provided on the bonnet 11 of the vehicle 10. According to this configuration, outside air can be easily introduced into the heat exchange module 20. (Modification example) Next, a modification of the heat exchange module 20 will be described.
  • the heat exchange module 20 of this modified example is arranged in a portion on the rear side of the vehicle in the upper part of the bonnet 11 of the vehicle 10.
  • a partition wall 213 is provided inside the case 21 of the heat exchange module 20 so as to extend rearward from the central portion in the outside air flow direction A.
  • the cooling passage 211 and the air conditioning passage 212 are partitioned and formed by the partition wall 213.
  • a blower 27 is arranged in a portion of the inside of the case 21 on the upstream side of the partition wall 213.
  • the blower 27 blows the outside air introduced from the outside air introduction port 210 of the case 21 into the cooling passage 211 and the air conditioning passage 212, respectively.
  • a first cooling side heat exchange unit 81 and a second cooling side heat exchange unit 82 are arranged in the cooling passage 211.
  • the first cooling side heat exchange unit 81 functions as a radiator for cooling the cooling water of the heating element 41.
  • the second cooling side heat exchange unit 82 functions as a condenser for the refrigeration cycle used in the air conditioner of the vehicle.
  • An outdoor communication port 214 is provided on the downstream side of the cooling passage 211. Therefore, the outside air that has passed through the first cooling side heat exchange unit 81 and the second cooling side heat exchange unit 82 is discharged to the outside of the vehicle interior through the vehicle interior outside communication port 214.
  • the air conditioning side heat exchange unit 83 is arranged in the air conditioning passage 212.
  • the air-conditioning side heat exchange unit 83 functions as an evaporator of the refrigeration cycle used in the air-conditioning device of the vehicle.
  • a vehicle interior communication port 215 is provided on the downstream side of the air conditioning passage 212. Therefore, the conditioned air cooled by the air-conditioning side heat exchange unit 83 is introduced into the vehicle interior through the vehicle interior communication port 215. As a result, the interior of the vehicle can be cooled.
  • the heat exchange module 20 of this modification it is possible to cool the heating element 41 and the interior of the vehicle, and it is possible to improve the mountability.
  • the above embodiment can also be implemented in the following embodiments.
  • the heat exchange module 20 has an inside air introduction port 28 for introducing air in the vehicle interior and an inside air introduced from the inside air introduction port 28 upstream of the second blower 26 in the air conditioning passage 212.
  • the inside air passage 29 leading to the side portion, the communication passage 290 communicating the inside air passage 29 and the air conditioning passage 212, and the door member for opening and closing the communication passage 290 may be further provided.
  • the so-called inside air circulation mode can be realized by introducing the inside air from the inside air introduction port 28 instead of the air conditioning side outside air introduction port 210b.
  • the control device 70 may execute the frost formation suppression mode when the cooling side heat exchange unit 22 actually frosts.
  • the case 21 may be provided with the cooling side outside air introduction port 210a and the air conditioner side outside air introduction port 210b separately. Further, the case 21 may be provided with the cooling passage 211 and the air conditioning passage 212 separately.
  • -The case 21 may be provided with the cooling passage 211 and the air conditioning passage 212 separated from each other.
  • -The outside communication port 214 may be a portion that discharges air to a place other than the outside of the vehicle, for example, a motor room in which a motor generator is provided, an engine room in which an internal combustion engine is provided, or the like.
  • the outside air introduction port 210 is not limited to the bonnet 11, and may be, for example, a portion that introduces outside air from the front or under the floor of the vehicle 10.
  • the heat exchange module 20 may have one blower common to the cooling passage 211 and the air conditioning passage 212.
  • the outside air introduction port 210 and the vehicle interior communication port 214 may not be partitioned by the partition wall 213.
  • An air-heated PTC (Positive Temperature Coefficient) heater may be used instead of the second air-conditioning side heat exchange unit 25 that functions as a heater core.
  • the case 21 may not be provided with the partition wall 213. That is, the cooling passage 211 and the air conditioning passage 212 may not be formed separately.
  • the heat pump system 50 may operate only as a refrigeration cycle for cooling the conditioned air. In this case, since it is not necessary to execute the heating mode or the frost formation suppression mode, the case 21 may not have the communication passage 216 formed.
  • the heat exchange module 20 is not limited to the one that introduces the traveling wind of the vehicle 10 as the outside air, and the blower device 23, for example, in a state where the vehicle 10 is charging or waiting for a signal, while the vehicle 10 is stopped.
  • the outside air may be introduced by driving the 26.
  • the vehicle 10 is not limited to an electric vehicle, but may be an engine vehicle that travels by the power of an internal combustion engine, or a hybrid vehicle that travels by the power of an electric motor and an internal combustion engine.
  • the internal combustion engine serves as a heating element.
  • a battery that supplies electric power to an electric motor and an internal combustion engine serve as heating elements.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
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US20220266656A1 (en) * 2019-09-10 2022-08-25 Denso Corporation Vehicle heat exchange system

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Publication number Priority date Publication date Assignee Title
JP2024132223A (ja) * 2023-03-17 2024-09-30 三菱重工サーマルシステムズ株式会社 車両用温調システムおよび熱交換器

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JPS51160837U (enExample) * 1975-06-16 1976-12-21
JPS6213953B2 (enExample) * 1979-04-27 1987-03-30 Torii Yakuhin Kk
WO2009044862A1 (ja) * 2007-10-04 2009-04-09 Calsonic Kansei Corporation 車両用空調装置
WO2012114426A1 (ja) * 2011-02-21 2012-08-30 株式会社日立製作所 車両用空調システム

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EP3081408B1 (en) * 2014-07-31 2019-06-26 Hanon Systems Automotive heat pump system

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JPS51160837U (enExample) * 1975-06-16 1976-12-21
JPS6213953B2 (enExample) * 1979-04-27 1987-03-30 Torii Yakuhin Kk
WO2009044862A1 (ja) * 2007-10-04 2009-04-09 Calsonic Kansei Corporation 車両用空調装置
WO2012114426A1 (ja) * 2011-02-21 2012-08-30 株式会社日立製作所 車両用空調システム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220266656A1 (en) * 2019-09-10 2022-08-25 Denso Corporation Vehicle heat exchange system
US12090814B2 (en) * 2019-09-10 2024-09-17 Denso Corporation Vehicle heat exchange system

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