WO2023228645A1 - Système de climatisation pour véhicule - Google Patents

Système de climatisation pour véhicule Download PDF

Info

Publication number
WO2023228645A1
WO2023228645A1 PCT/JP2023/015937 JP2023015937W WO2023228645A1 WO 2023228645 A1 WO2023228645 A1 WO 2023228645A1 JP 2023015937 W JP2023015937 W JP 2023015937W WO 2023228645 A1 WO2023228645 A1 WO 2023228645A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat medium
heat exchanger
flow path
heat
refrigerant
Prior art date
Application number
PCT/JP2023/015937
Other languages
English (en)
Japanese (ja)
Inventor
宣伯 清水
Original Assignee
サンデン株式会社
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 サンデン株式会社 filed Critical サンデン株式会社
Publication of WO2023228645A1 publication Critical patent/WO2023228645A1/fr

Links

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
    • 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
    • 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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series

Definitions

  • the present invention relates to an air conditioner for a vehicle.
  • Such vehicle air conditioners generally include a refrigerant circuit that includes a compressor, a condenser for heat radiation, an expansion mechanism, and an evaporator for heat absorption, and a heat medium that exchanges heat with the refrigerant in the condenser or evaporator. It consists of a vehicle interior air conditioning unit that is equipped with a circulating heat medium circuit and an internal heat exchanger through which the heat medium circulating in the heat medium circuit passes. Heating operation is performed by sending the heat medium to the heat exchanger of the air conditioning unit, and cooling operation is performed by sending the heat medium, which has become low temperature due to heat absorption in the evaporator, to the heat exchanger of the cabin air conditioning unit.
  • heating efficiency is improved by flowing a high-temperature heat medium through all the heat exchangers provided in the vehicle interior air conditioning unit during heating operation.
  • the temperature range of the heat medium flowing through the multiple heat exchangers in the vehicle interior air conditioning unit is uniform, so when the outside temperature is particularly low or when there is a request for a rapid increase in the interior temperature,
  • the present invention aims to address such problems.
  • a vehicle air conditioner equipped with a heat pump type refrigerant circuit it is possible to improve the efficiency so that it can respond to the request for a rapid increase in indoor temperature when the outside temperature is particularly low or when heating is started, and the critical temperature is low.
  • An object of the present invention is to enable efficient heat exchange even when using a refrigerant circuit for refrigerant.
  • a vehicle air conditioner includes a refrigerant circuit, a heat medium circuit in which a heat medium heated or cooled by the refrigerant circuit circulates, and a plurality of heat medium circuits in which a heat medium circulates through the heat medium circuit.
  • a vehicle air conditioner comprising: a heat exchanger disposed in an air flow passage, and an air conditioning unit that controls the temperature of air passing through the air flow passage and blows it into a vehicle interior, the refrigerant circuit comprising:
  • the heating medium includes a first refrigerant heat medium heat exchanger and a second refrigerant heat medium heat exchanger that are provided in order along the refrigerant circulation direction and radiate heat of the refrigerant to the heat medium circulating in the heat medium circuit.
  • the circuit includes a flow path through which the heat medium that has passed through either the first refrigerant heat medium heat exchanger or the second refrigerant heat medium heat exchanger flows into at least one of the plurality of heat exchangers;
  • a flow path switching unit is provided that switches between a flow path through which the heat medium that has passed through both the first refrigerant heat medium heat exchanger and the second refrigerant heat medium heat exchanger flows into the plurality of heat exchangers.
  • the vehicle air conditioner of the present invention having such features, it is possible to improve efficiency so as to respond to a request for a rapid increase in indoor temperature when the outside temperature is particularly low or when heating is started, and the critical temperature Even when using a refrigerant circuit with a low refrigerant, efficient heat exchange can be performed.
  • FIG. 1 is an explanatory diagram showing a schematic configuration of a vehicle air conditioner according to an embodiment of the present invention.
  • FIG. 1 is a block diagram showing a schematic configuration of a control section of a vehicle air conditioner according to an embodiment of the present invention.
  • FIG. 2 is an explanatory diagram showing the flow of a heat medium when the first heating mode is executed in the vehicle air conditioner according to the embodiment of the present invention.
  • FIG. 6 is an explanatory diagram showing the flow of a heat medium when the second heating mode is executed in the vehicle air conditioner according to the embodiment of the present invention.
  • FIG. 3 is an explanatory diagram showing the flow of a heat medium when a cooling mode is executed in the vehicle air conditioner according to the embodiment of the present invention.
  • a heat medium circuit 10 is applied to, for example, a vehicle air conditioner 1 that is mounted on a vehicle and performs temperature control of in-vehicle equipment and air conditioning in a vehicle interior.
  • the vehicle air conditioner 1 has a refrigerant circuit R serving as a heat source, a heat medium circuit 10 that circulates a heat medium whose temperature is controlled by heat exchange with the refrigerant, and a temperature controlled by the heat medium circulating in the heat medium circuit 10.
  • An air conditioning unit 80 that supplies air into the vehicle interior is provided.
  • a compressor 11, a condenser 12 (a first condenser 121 and a second condenser 122), an expansion valve 13, an evaporator 14, and an accumulator 15 are sequentially connected by refrigerant piping. It is a closed circuit that circulates refrigerant.
  • the condenser 12 includes a first condenser 121 and a second condenser 122 arranged in order from the upstream side in the refrigerant circulation direction in the refrigerant circuit R.
  • the refrigerant circuit R may be a circuit that includes a receiver downstream of the condenser 12, for example.
  • the heat medium circuit 10 includes a high temperature heat medium flow path 20, a low temperature heat medium flow path 30, a temperature control target heat medium flow path 40, a tank 50, a first flow path switching section V1 as a flow path switching section, and a second flow path. It is configured to include a switching section V2, a four-way valve 61, and a four-way valve 62.
  • the high temperature heat medium flow path 20 includes a high temperature heat exchanger 21 that is integrated with the condenser 12 in the refrigerant circuit R and is a refrigerant heat medium heat exchanger that performs heat medium-refrigerant heat exchange.
  • the high-temperature heat exchanger 21 includes a first high-temperature heat exchanger 211 (first refrigerant heat medium heat exchanger) that is integrated with the first condenser 121 to perform heat exchange between the heat medium and the refrigerant, and a second condenser 122. and a second high temperature heat exchanger 212 (second refrigerant heat medium heat exchanger) that performs heat exchange between the heat medium and the refrigerant.
  • the heat medium pumped by the first pump P1 becomes high in temperature due to heat radiation of the refrigerant in the condenser 12 in the refrigerant circuit R, and circulates while passing through the high-temperature heat exchanger 21.
  • the high temperature heat medium flow path 20 includes a first high temperature heat medium flow path 201 including a first high temperature heat exchanger 211 and a second high temperature heat medium flow path 202 including a second high temperature heat exchanger 212.
  • the first high temperature heat medium flow path 201 and the second high temperature heat medium flow path 202 can be made into independent flow paths by controlling the first flow path switching section V1, the four-way valve 61, and the four-way valve 62.
  • one flow path including a first high temperature heat exchanger 211 and a second high temperature heat exchanger 212 that are connected to each other can be formed.
  • the low-temperature heat medium flow path 30 includes a low-temperature heat exchanger 31 that is integrated with the evaporator 14 in the refrigerant circuit R and performs heat exchange between the heat medium and the refrigerant. However, while passing through the low-temperature heat exchanger 31, the temperature becomes low due to heat absorption by the refrigerant in the evaporator 14 in the refrigerant circuit R, and the refrigerant circulates.
  • the temperature-controlled heat medium flow path 40 includes a battery heat exchanger 41 that controls the temperature of the battery in an electric vehicle, a motor heat exchanger 42 that controls the temperature of the driving motor, and an inverter that controls the temperature of the inverter.
  • a PCU heat exchanger 44 for controlling the temperature of the power control unit, and an outdoor heat exchanger 45 are provided.
  • the heat medium is pumped by the third pump P3.
  • a third flow path 403 including the heat exchanger 43 and the PCU heat exchanger 44 is connected via the second flow path switching section V2.
  • the tank 50 has an inlet 52 connected to the high temperature heat medium flow path 20, an inlet 54 connected to the temperature controlled heat medium flow path 40, and an outlet 53 connected to the low temperature heat medium flow path 30. It is equipped with The high temperature heat medium flow path 20 is provided with a connection portion 28 connected to the inlet 52 on the heat medium upstream side of the first pump P1.
  • the temperature-controlled heat medium flow path 40 is provided with a connecting portion 48 connected to the inlet 54 on the downstream side of the heat medium of each temperature-controlled heat exchanger.
  • the low-temperature heat medium flow path 30 is provided with a connection portion 38 connected to the outlet 53 on the heat medium upstream side of the second pump P2.
  • the tank 50 is connected to the upstream side of the first pump P1 in the high-temperature heat medium flow path 20 through the inlet 52, and is connected to the upstream side of the first pump P1 in the temperature-controlled heat medium flow path 40 through the inflow port 54. It is connected to the heat medium downstream side of the heat exchanger 42 and connected to the heat medium upstream side of the second pump P2 in the low temperature heat medium flow path 30 through the outlet 53.
  • a relief valve 57 is provided in a path from the connection portion 28 to the inlet 52 of the tank 50.
  • a relief valve 58 is provided in a path from the connection portion 48 to the inlet 54 of the tank 50.
  • heat medium circulating in the heat medium circuit 10 water without additives, water mixed with additives such as antifreeze agents and preservatives, or liquid heat medium such as oil may be used. can do.
  • the air conditioning unit 80 includes an inlet 83 that sucks air (outside air or inside air) into the air conditioning unit 80, an air flow passage 84 through which the air sucked from the inlet 83 passes, and a heat medium circuit provided in the air flow passage 84.
  • the heat exchanger 81 includes a first heat exchanger 81 and a second heat exchanger 82 through which the heat medium circulating through the heat exchanger 10 flows.
  • the air introduced into the air flow path 84 from the suction port 83 is ventilated through the first heat exchanger 81 and the second heat exchanger 82, and the air is passed through the first heat exchanger 81 and the second heat exchanger 82.
  • Temperature-controlled air is blown into the vehicle interior by exchanging heat with the heat medium.
  • FIG. 2 shows a schematic configuration of a control unit 100 that controls the vehicle air conditioner 1. Note that in FIG. 2, illustrations and descriptions of configurations that are not directly related to the operation of the vehicle air conditioner 1 according to the present embodiment are omitted as appropriate.
  • the control unit 100 is connected via a vehicle communication bus to a vehicle controller 200 that controls the entire vehicle, including drive control of the driving motor, inverter, and power control unit, and battery charging and discharging control, and transmits and receives information.
  • a computer including a processor, such as an ECU (Electronic Control Unit) or a microcomputer, can be applied.
  • the control unit 100 includes a temperature sensor TC1 that detects the temperature of the heat medium that flows into the high-temperature heat exchanger 21 and is heated by the condenser 12; temperature sensor TC2 that detects the temperature of the heat medium flowing into the first heat exchanger 81 and second heat exchanger 82 of the air conditioning unit 80; temperature sensor TC80 that detects the temperature of the heat medium flowing into the first heat exchanger 81 and second heat exchanger 82 of the air conditioning unit 80; Temperature sensor TC41 (temperature of the battery itself, temperature of the heat medium flowing into or out of the battery heat exchanger 41), motor temperature sensor TC42 (temperature of the motor itself, temperature of the motor) detecting the temperature of the motor.
  • TC1 that detects the temperature of the heat medium that flows into the high-temperature heat exchanger 21 and is heated by the condenser 12
  • temperature sensor TC2 that detects the temperature of the heat medium flowing into the first heat exchanger 81 and second heat exchanger 82 of the air conditioning unit 80
  • the inverter temperature sensor TC43 detects the temperature of the inverter (the temperature of the inverter itself, the temperature of the heat medium flowing into or out of the inverter heat exchanger 43).
  • PCU temperature sensor TC44 that detects the temperature of the power control unit (temperature of the PCU itself, temperature of the heat medium flowing into or out of the PCU heat exchanger 44); , any one of the temperatures), and the air conditioning operation unit 300 are connected.
  • the output of the control section 100 includes the expansion valve 13, the first pump P1, the second pump P2, the third pump P3, the first flow path switching section V1, the second flow path switching section V2, and the four-way valves 61, 62. is connected.
  • the control unit 100 controls these based on the output of each sensor, the settings input at the air conditioning operation unit 300, and information from the vehicle controller 200.
  • the control unit 100 controls the first flow path switching portion V1, the second flow path switching portion V2, and the four-way valves 61 and 62, thereby increasing the temperature of the heat medium circuit 10.
  • the heating medium flow path 20, the low-temperature heat medium flow path 30, and the temperature-controlled heat medium flow path 40 can be switched to be independent paths or connected paths.
  • the high temperature heat medium flow path of the heat medium circuit 10 is controlled by the control unit 100 controlling the first flow path switching portion V1, the second flow path switching portion V2, and the four-way valves 61, 62. 20 or the low-temperature heat medium flow path 30 are selectively connected to the first heat exchanger 81 or the second heat exchanger 82 depending on the purpose of air conditioning or the target air conditioning temperature.
  • the temperature-controlled heat medium in one or both of the high temperature heat medium flow path 20 and the low temperature heat medium flow path 30 passes through at least one of the first flow path switching section V1 and the second flow path switching section V2. It flows into at least one of the first heat exchanger 81 and the second heat exchanger 82 via the heat exchanger 82 .
  • the control unit 100 connects the first high temperature heat medium flow path 201 and the second high temperature heat medium flow path 202 in the high temperature heat medium flow path 20, and controls the first high temperature heat exchanger 211 and the second high temperature heat medium flow path
  • the heat medium that has passed through the two high-temperature heat exchangers 212 can be controlled to flow into both the first heat exchanger 81 and the second heat exchanger 82.
  • the heat medium that has passed through the second high temperature heat exchanger 212 and the first high temperature heat exchanger 211 in order flows through the second heat exchanger 82 disposed on the downstream side of the air flow passage 84, the It flows into the first heat exchanger 81 arranged on the upstream side of the flow path 84 .
  • control unit 100 sets the first high temperature heat medium flow path 201 and the second high temperature heat medium flow path 202 as independent flow paths, and transfers the heat medium that has passed through the first high temperature heat exchanger 211 to the air flow path 84.
  • the heat medium that has passed through the second high temperature heat exchanger 212 is controlled to flow to the first heat exchanger 81 located on the upstream side of the airflow passage 84 while flowing into the second heat exchanger 82 located on the downstream side. can do.
  • the control unit 100 controls the first flow path switching unit V1 to transfer the heat medium that has flowed into the high temperature heat exchanger 21 of the high temperature heat medium flow path 20 and been heated by the condenser 12 to the air conditioning unit 80.
  • the air flows through the first heat exchanger 81 and the second heat exchanger 82, and heats the air passing through the air flow passage 84 of the air conditioning unit 80.
  • the control unit 100 converts the heat medium that has flowed into the low-temperature heat exchanger 31 of the low-temperature heat medium flow path 30 and been cooled by the evaporator 14 into a first heat medium arranged in the air conditioning unit 80 using the first flow path switching unit V1.
  • the air passing through the air conditioning unit 80 is cooled by controlling the air to flow through the exchanger 81 and the second heat exchanger 82 .
  • control unit 100 controls the first flow path switching unit V1, the second flow path switching unit V2, and the four-way valves 61, 62 to Depending on the target temperature of the exchanger (battery heat exchanger 41, motor heat exchanger 42, inverter heat exchanger 43, PCU heat exchanger 44), the high temperature heat medium or The low-temperature heat medium in the low-temperature heat medium flow path 30 is circulated to the temperature-controlled heat medium flow path 40.
  • the exchanger battery heat exchanger 41, motor heat exchanger 42, inverter heat exchanger 43, PCU heat exchanger 44
  • the temperature-controlled heat medium in the high-temperature heat medium flow path 20 or the low-temperature heat medium flow path 30 By circulating the temperature-controlled heat medium in the high-temperature heat medium flow path 20 or the low-temperature heat medium flow path 30 through the temperature-controlled heat medium flow path 40, the battery heat exchanger 41, the motor heat exchanger 42, and the inverter
  • the temperature of the PCU heat exchanger 43 and the PCU heat exchanger 44 can be controlled.
  • a first heating mode that can respond to a request for a rapid increase in vehicle interior temperature, such as when the outside air temperature is particularly low or when starting the vehicle air conditioner, is used.
  • Various operation modes can be executed, such as a second heating mode in which the increase request is lower than that in the first heating mode, a cooling mode, a dehumidification mode, and a temperature control mode including cooling or warming up of in-vehicle equipment.
  • the refrigerant circuit R of the vehicle air conditioner 1 controls the heat radiation of the condenser 12 and the heat absorption of the evaporator 14 while appropriately controlling the rotation speed of the compressor 11 by the control unit 100.
  • the temperature of the air supplied to the vehicle interior is adjusted to the target temperature, and the interior of the vehicle is air-conditioned.
  • the refrigerant circulates as follows.
  • the high-pressure gas refrigerant discharged from the compressor 11 radiates heat by exchanging heat with the heat medium passing through the high-temperature heat exchanger 21 in the condenser 12, liquefies and condenses, and becomes a high-pressure liquid refrigerant.
  • the high-pressure liquid refrigerant flowing out of the condenser 12 is depressurized and expanded by the expansion valve 13, becomes a low-pressure refrigerant, and flows into the evaporator 14.
  • the low-pressure refrigerant that has flowed into the evaporator 14 is evaporated by exchanging heat with the heat medium passing through the low-temperature heat exchanger 31 in the evaporator 14, becomes a gas refrigerant, flows out of the evaporator 14, and is passed through the accumulator 15. Return to compressor 11.
  • a first heating mode that can respond to a request for a rapid increase in temperature in the vehicle interior
  • a second heating mode in which the request for increase in temperature in the vehicle interior is lower than that in the first heating mode
  • a cooling mode will be described.
  • the first heating mode is a heating mode that can respond to a request for a rapid increase in the temperature inside the vehicle, and is a heating mode that can respond to a request for a rapid increase in the temperature inside the vehicle.
  • This is an operation mode in which the outdoor heat exchanger 45 is used as a heat absorption source to heat the vehicle interior and each seat while warming up using heat.
  • the first high temperature heat medium flow path 201 and the second high temperature heat medium flow path 202 of the high temperature heat medium flow path 20 are respectively independent flow paths, and the first high temperature heat medium flow path
  • the heat medium heated in the first high temperature heat exchanger 211 of 201 is introduced into the second heat exchanger 82.
  • the heat medium heated in the second high temperature heat exchanger 212 of the second high temperature heat medium flow path 202 is introduced into the first heat exchanger 81 .
  • FIG. 3 shows the flow of the heat medium in the first heating mode.
  • the piping in which the high temperature heat medium circulates is shown as a solid black line
  • the piping in which the low temperature heat medium circulates is shown as a dashed line
  • the heat medium in the intermediate temperature range between high and low temperatures is shown in gray.
  • the control section 100 controls the first flow path switching section V1, the second flow path switching section V2, and the four-way valves 61 and 62 to circulate the heat medium in the heat medium circuit 10 as follows.
  • the control unit 100 makes the first high temperature heat medium flow path 201 and the second high temperature heat medium flow path 202 of the high temperature heat medium flow path 20 independent flow paths, and controls the first high temperature heat medium flow path 201 and the second high temperature heat medium flow path 202 of the high temperature heat medium flow path 20 to
  • the flow path 401 and the third flow path 403 are connected to the second high temperature heat medium flow path 202 .
  • the control unit 100 connects the second heat exchanger 82 to the first high temperature heat medium flow path 201 and connects the first heat exchanger 81 to the second high temperature heat medium flow path 202.
  • the heat medium heated by passing through the first high temperature heat exchanger 211 flows to the second heat exchanger 82 via the first flow path switching part V1, and the heat medium that has flowed into the second heat exchanger 82
  • the medium exchanges heat with the air passing through the air flow passages 84.
  • the heat medium that has flowed through the second heat exchanger 82 is repeatedly circulated through the four-way valve 62 and returned to the first high temperature heat exchanger 211 by the first pump P1.
  • the heat medium heated by passing through the second high temperature heat exchanger 212 flows into the first heat exchanger 81 via the four-way valve 62 and the first flow path switching section V1, and flows through the air flow path 84. It exchanges heat with the air passing through it.
  • the heat medium that has exited the first heat exchanger 81 flows into the battery heat exchanger 41 by the third pump P3 via the first flow path switching section V1, the four-way valve 61, and the second flow path switching section V2. to heat the battery.
  • the heat medium that has passed through the battery heat exchanger 41 sequentially flows into the PCU heat exchanger 44, the inverter heat exchanger 43, and the motor heat exchanger 42 via the second flow path switching section V2.
  • the heat medium which recovers waste heat by passing through the PCU heat exchanger 44, inverter heat exchanger 43, and motor heat exchanger 42 and exchanging heat with each on-vehicle device, is heated as necessary in the ECH 46.
  • the heat exchanger then returns to the second high temperature heat exchanger 212 via the four-way valve 61 and repeats the circulation. Thereby, the vehicle interior can be heated by the first heat exchanger 81 and the second heat exchanger 82.
  • the heat medium heated by the first high-temperature heat exchanger 211 circulates through the first high-temperature heat medium flow path 201, the heat medium expands due to temperature rise, and if the amount of heat medium increases relative to the circuit capacity, a relief occurs.
  • the valve 57 is opened, and the heat medium flows into the tank 50 from the inlet 52 via the connection portion 28 and is stored therein.
  • the control unit 100 controls the first flow path switching unit V1 and the second flow path so that the low temperature heat medium flow path 30 and the second flow path 402 of the temperature control target heat medium flow path 40 become connected.
  • the switching unit V2 is controlled to circulate the heat medium that has passed through the low-temperature heat exchanger 31 and been cooled to the low-temperature heat medium flow path 30 and the second flow path 402 of the temperature-controlled heat medium flow path 40. That is, the heat medium that has passed through the low-temperature heat exchanger 31 and has been cooled flows into the outdoor heat exchanger 45 via the first flow path switching section V1 and the second flow path switching section V2, and exchanges heat with the outside air. After that, it returns to the low-temperature heat exchanger 31 by the second pump via the second flow path switching section V2.
  • the outdoor heat exchanger 45 can be used as a heat absorption source.
  • the temperature of the heat medium decreases and contracts, so that the amount of heat medium is reduced relative to the circuit capacity.
  • the heat medium stored in the tank 50 flows out from the outlet 53 and flows into the low-temperature heat medium flow path 30 via the connection part 38.
  • the second heat exchanger disposed on the downstream side in the air flow direction
  • the heat medium heated in the first high temperature heat exchanger 211 flows into the exchanger 82 .
  • the heat medium heated in the second high temperature heat exchanger 212 flows into the first heat exchanger 81 arranged on the upstream side in the air flow direction.
  • the first high-temperature heat exchanger 211 is disposed upstream of the second high-temperature heat exchanger 212 in the refrigerant circulation direction, so that the heat heated in the first high-temperature heat exchanger 211 is The medium has a higher temperature than the heat medium heated in the second high temperature heat exchanger 212. Therefore, the heat medium circulating in the first high temperature heat medium flow path 201 has a higher temperature than the heat medium circulating in the second high temperature heat medium flow path 202, and the first heat exchanger 81 has a second heat exchanger. A heat medium having a lower temperature than the container 82 flows into the container 82 .
  • the air introduced into the air flow passage 84 is preheated in the first heat exchanger 81 before passing through the second heat exchanger 82, and then heated in the second heat exchanger 82. Since further heating is performed using a high-temperature heat medium, efficient heat exchange can be performed between the heat medium and the air, and efficiency during heating operation can be improved. In addition, by using two condensers in the refrigerant circuit and performing heat exchange between the refrigerant and heat medium in two stages, even refrigerants with low critical temperatures such as CO2 can be efficiently Heating operation can be realized.
  • the second heating mode warms up the battery using waste heat from other various in-vehicle devices, and warms up the battery inside the vehicle using the outdoor heat exchanger 45 as a heat absorption source. This is an operating mode that performs heating for each seat.
  • the first high temperature heat medium flow path 201 and the second high temperature heat medium flow path 202 of the high temperature heat medium flow path 20 are connected to form one flow path, and the first high temperature heat exchanger
  • the heat medium heated in both the high temperature heat exchanger 211 and the second high temperature heat exchanger 212 is introduced into the first heat exchanger 81 and the second heat exchanger 82.
  • FIG. 4 shows the flow of the heat medium in the second heating mode.
  • FIG 4 piping in which high-temperature heat carriers circulate is shown by solid black lines, piping in which low-temperature heat carriers circulate by dashed lines, and heat in the intermediate temperature range between high and low temperatures is shown.
  • the piping through which the medium circulates is shown in gray.
  • the control section 100 controls the first flow path switching section V1, the second flow path switching section V2, and the four-way valves 61 and 62 to circulate the heat medium in the heat medium circuit 10 as follows.
  • the control unit 100 connects the first high-temperature heat medium flow path 201 and the second high-temperature heat medium flow path 202 to form one flow path, which passes through the first high-temperature heat exchanger 211 and the second high-temperature heat exchanger 212.
  • the heated heat medium is circulated. That is, the heat medium passed through the first high temperature heat exchanger 211 and heated flows into the second heat exchanger 82 via the first flow path switching section V1.
  • the heat medium flowing into the second heat exchanger 82 exchanges heat with the air passing through the air flow path 84, and then flows into the first heat exchanger 81 via the four-way valve 62 and the first flow path switching section V1. and exchanges heat with the air passing through the airflow passage 84.
  • the heat medium that has exited the first heat exchanger 81 flows into the second high temperature heat exchanger 212 via the first flow path switching section V1 and the four-way valve 61 and is heated.
  • the heat medium that has exited the second high temperature heat exchanger 212 repeats the circulation by passing through the four-way valve 62 and returning to the first high temperature heat exchanger 211 by the first pump P1. Thereby, the vehicle interior can be heated by the first heat exchanger 81 and the second heat exchanger 82.
  • the relief valve 57 becomes open and the heat medium flows into the tank 50 from the inlet 52 via the connecting portion 28 and is stored therein.
  • the control unit 100 switches the first flow path switching unit so that the low temperature heat medium flow path 30 and the second flow path 402 including the outdoor heat exchanger 45 among the temperature control target heat medium flow paths 40 become connected.
  • V1 and the second flow path switching unit V2 are controlled to circulate the heat medium that has passed through the low temperature heat exchanger 31 and been cooled to the low temperature heat medium flow path 30 and the second flow path 402.
  • the heat medium that has passed through the low-temperature heat exchanger 31 and has been cooled flows into the outdoor heat exchanger 45 via the first flow path switching section V1 and the second flow path switching section V2, and exchanges heat with the outside air. After that, it returns to the low-temperature heat exchanger 31 via the second flow path switching section V2 again by the second pump P2.
  • the outdoor heat exchanger 45 can be used as a heat absorption source.
  • the temperature of the heat medium decreases and contracts, so that the amount of heat medium is reduced relative to the circuit capacity.
  • the heat medium stored in the tank 50 flows out from the outlet 53 and flows into the low-temperature heat medium flow path 30 via the connection part 38.
  • the control unit 100 controls the second flow path switching unit V2 and the four-way valve 61 so that the first flow path 401 and the third flow path 403 of the temperature-controlled heat medium flow path 40 become independent flow paths,
  • the heat medium is circulated in the first flow path 401 and the third flow path 403 of the heat medium flow path 40 to be temperature controlled. That is, in the temperature-controlled heat medium flow path 40, the heat that has passed through the PCU heat exchanger 44, the inverter heat exchanger 43, and the motor heat exchanger 42 in order and has reached a medium temperature due to the waste heat thereof.
  • the medium is force-fed to the battery heat exchanger 41 by the third pump P3 via the four-way valve 61 and the second flow path switching section V2, thereby warming up the battery.
  • the heat medium whose temperature has decreased by warming up the battery in the battery heat exchanger 41 passes through the PCU heat exchanger 44, the inverter heat exchanger 43, and the motor heat exchanger 42 again, and its temperature decreases. rises. By repeating such circulation, it is possible to warm up the battery while controlling the temperature of other in-vehicle devices. Note that, if necessary, the ECH 46 provided downstream of the motor heat exchanger 42 can be operated to heat the heat medium.
  • the relief valve 58 In the process of circulating through the first flow path 401 and the third flow path 403 of the temperature-controlled heat medium flow path 40, when the heat medium expands due to temperature rise and the amount of heat medium increases relative to the circuit capacity, the relief valve 58 is in an open state, and the heat medium flows into the tank 50 from the inlet 54 via the connection portion 48 and is stored therein.
  • the heat medium is heated in advance by the second high temperature heat exchanger 212, which is disposed on the downstream side in the refrigerant circulation direction, of the first high temperature heat exchanger 211 and the second high temperature heat exchanger 212.
  • the heat medium is heated again by the first high temperature heat exchanger 211 disposed on the upstream side in the refrigerant circulation direction.
  • the first high-temperature heat exchanger 211 is disposed upstream of the second high-temperature heat exchanger 212 in the refrigerant circulation direction.
  • the passing heat medium has a higher temperature than when passing through the second high temperature heat exchanger 212.
  • the heat medium heated in two stages in the second high temperature heat exchanger 212 and the first high temperature heat exchanger 211 flows into the second heat exchanger 82 disposed on the downstream side of the air conditioning unit 80 in the air flow direction.
  • the heat medium flows into the first heat exchanger 81 disposed on the upstream side in the air flow direction, and exchanges heat with air using the remaining heat amount of the heat medium.
  • the air introduced into the air flow path 84 is preheated in the first heat exchanger 81 before passing through the second heat exchanger 82, and then heated in the second heat exchanger 82. Heat again at .
  • the remaining heat amount of the heat medium after exchanging heat with the air in the second heat exchanger 82 is used for heating the air in the first heat exchanger 81, an efficient Heat exchange can be performed, and the heating efficiency of the air conditioning unit 80 can be improved.
  • the refrigerant circuit R by using two condensers, the first condenser 121 and the second condenser 122, to perform heat exchange between the refrigerant and the heat medium in two stages, critical Efficient heating operation can be achieved even with a low-temperature refrigerant.
  • the cooling mode in this embodiment is an operation mode in which a cooled heat medium is also introduced into the battery heat exchanger 41 to cool the battery at the same time as cooling the vehicle interior.
  • the outdoor heat exchanger 45 not only radiates heat from the refrigerant circuit R, but also heat exchangers other than the battery heat exchanger 41, such as the motor heat exchanger 42, the inverter heat exchanger 43, and the PCU heat exchanger 44. It also radiates heat from the heat medium that recovers waste heat from each on-vehicle device.
  • the refrigerant passing through the evaporator 14 and the heat medium passing through the low-temperature heat exchanger 31 are exchanged, and the cooled heat medium is transferred to the air conditioning unit 80. It is introduced into the first heat exchanger 81 and the second heat exchanger 82.
  • FIG. 5 shows the flow of the heat medium in the cooling mode according to this embodiment.
  • piping through which a high temperature heat medium circulates is shown by a solid black line
  • piping through which a low temperature heat medium circulates is shown by a dashed line.
  • the control section 100 controls the first flow path switching section V1, the second flow path switching section V2, and the four-way valves 61 and 62 to circulate the heat medium in the heat medium circuit 10 as follows.
  • the control unit 100 switches the first flow path switching unit so that the low temperature heat medium flow path 30 and the first flow path 401 including the battery heat exchanger 41 among the temperature control target heat medium flow paths 40 are connected.
  • V1 the second flow path switching unit V2, and the four-way valve 62 to circulate the heat medium that has passed through the low temperature heat exchanger 31 and been cooled to the low temperature heat medium flow path 30 and the first flow path 401.
  • the heat medium that has passed through the low-temperature heat exchanger 31 and has been cooled flows to the second heat exchanger 82 via the first flow path switching section V1, and the heat medium that has flowed into the second heat exchanger 82 is , flows into the first heat exchanger 81 via the four-way valve 62 and the first flow path switching section V1, and exchanges heat with the air passing through the air flow path 84.
  • the heat medium that has exited the first heat exchanger 81 is sent under pressure to the battery heat exchanger 41 by the third pump P3 via the first flow path switching section V1 and the second flow path switching section V2. It passes through the exchanger 41, returns to the low temperature heat exchanger 31 by the second pump P2 via the second flow path switching section V2, and repeats the circulation. This cools the interior of the vehicle and the battery.
  • control unit 100 connects the first high temperature heat medium flow path 201 and the second high temperature heat medium flow path 202 of the high temperature heat medium flow path 20 into one flow path, and connects the first high temperature heat medium flow path 201 and the second high temperature heat medium flow path 202 of the high temperature heat medium flow path 20 to
  • the first flow path switching unit V1 is configured such that the second high temperature heat medium flow path 202 and the second flow path 402 and the third flow path 403 of the temperature control target heat medium flow path 40 are further connected. , controls the second flow path switching section V2 and the four-way valves 61 and 62.
  • the heat medium heated by passing through the first high temperature heat exchanger 211 and the second high temperature heat exchanger 212 is transferred to the first high temperature heat medium flow path 201, the second high temperature heat medium flow path 202, and the second flow path. 402 and the third flow path 403.
  • the heat medium passes through the second high-temperature heat exchanger 212, is heated, passes through the four-way valve 62, is pumped to the first high-temperature heat exchanger 211 by the first pump P1, and is further heated in the first high-temperature heat exchanger 211. heated.
  • the heat medium heated in this way flows into the outdoor heat exchanger 45 via the first flow path switching section V1, the four-way valve 61, and the second flow path switching section V2 in order, and then switches again to the second flow path switching section V1. It sequentially flows into the PCU heat exchanger 44, the inverter heat exchanger 43, the motor heat exchanger 42, and the ECH 46 via the section V2.
  • the heat medium circulating in the first high temperature heat medium flow path 201, the second high temperature heat medium flow path 202, the second flow path 402, and the third flow path 403 expands due to the temperature rise, and the circuit capacity increases.
  • the heat medium flows into the tank 50 and is stored therein.
  • the heat medium flows into the tank 50 either by opening the relief valve 57 and allowing the heat medium to flow into the tank 50 from the inlet 52 via the connection 28, or by opening the relief valve 58 and opening the connection 48. Then, it flows into the tank 50 from the inlet 54.
  • a low-temperature heat medium can flow through both of the two heat exchangers of the air conditioning unit 80, that is, the first heat exchanger 81 and the second heat exchanger 82.
  • the air before passing through the second heat exchanger 82 is cooled in advance in the first heat exchanger 81. be able to.
  • the air conditioning capacity of the air conditioning unit 80 is improved and the entire system is can improve thermal efficiency.
  • the refrigerant circuit R by using two condensers, the first condenser 121 and the second condenser 122, to perform heat exchange between the refrigerant and the heat medium in two stages, critical Efficient cooling operation can be achieved even with a low temperature refrigerant.
  • control unit 100 controls the first flow path switching unit V1 to be switched so that the heat medium that has flowed through the second heat exchanger 82 also flows through the first heat exchanger 81. That is, the first flow path switching unit V1 can be switched so that the heated or cooled heat medium flows through both of the plurality of first heat exchangers 81 and second heat exchangers 82 included in the air conditioning unit 80. Therefore, it is possible to improve the air conditioning capacity when executing the heating mode or the cooling mode.
  • R refrigerant circuit
  • 1 vehicle air conditioner
  • 10 heat medium circuit
  • 11 Compressor
  • 12 Condenser
  • 13 Expansion valve
  • 14 Evaporator
  • 15 Accumulator
  • 20 high temperature heat medium flow path
  • 21 high temperature heat exchanger
  • 30 low temperature heat medium flow path
  • 31 low temperature heat exchanger
  • 40 Heat medium flow path for temperature control
  • 41 Heat exchanger for battery
  • 42 Heat exchanger for motor
  • 43 Heat exchanger for inverter
  • 44 Heat exchanger for PCU
  • 45 Outdoor heat exchanger
  • 46 ECH
  • 50 tank
  • 52 inlet
  • 53 outlet
  • 54 inlet
  • 57 relief valve
  • 58 relief valve
  • 28, 38 48: Connection part
  • 61, 62 Four-way valve
  • 80 air conditioning unit
  • 81 first heat exchanger
  • 82 second heat exchanger
  • 83 suction port
  • 84 air flow path
  • 100 control unit
  • 200 vehicle controller
  • 300 air conditioning operation unit
  • V1 first flow path switching section

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 répondre à une demande d'augmentation rapide de température intérieure lorsque la température extérieure est particulièrement basse ou lorsque le chauffage est allumé, et d'effectuer un échange de chaleur efficace même lors de l'utilisation d'un circuit de fluide frigorigène contenant un fluide frigorigène ayant une faible température critique.　L'invention porte sur un dispositif de climatisation de véhicule comprenant un circuit de fluide frigorigène, un circuit de milieu caloporteur dans lequel circule un milieu caloporteur à température régulée par le circuit de fluide frigorigène, ainsi qu'une unité de climatisation dans laquelle une pluralité d'échangeurs de chaleur à travers lesquels s'écoule un milieu caloporteur sont disposés dans un passage d'écoulement d'air et qui souffle de l'air à température régulée dans l'habitacle, le circuit de fluide frigorigène comprenant un premier échangeur de chaleur fluide frigorigène-milieu caloporteur et un second échangeur de chaleur fluide frigorigène-milieu caloporteur qui sont disposés dans l'ordre dans la direction de circulation de fluide frigorigène et qui libèrent la chaleur du fluide frigorigène au milieu caloporteur, et le circuit de milieu caloporteur présentant une unité de commutation de chemin d'écoulement qui commute entre un chemin d'écoulement qui permet au milieu caloporteur passant à travers soit le premier échangeur de chaleur fluide frigorigène-milieu caloporteur, soit le second échangeur de chaleur fluide frigorigène-milieu caloporteur, de s'écouler dans la pluralité d'échangeurs de chaleur, et un chemin d'écoulement qui permet au milieu caloporteur passant à la fois à travers le premier échangeur de chaleur fluide frigorigène-milieu caloporteur et le second échangeur de chaleur fluide frigorigène-milieu caloporteur de s'écouler dans la pluralité d'échangeurs de chaleur.
PCT/JP2023/015937 2022-05-23 2023-04-21 Système de climatisation pour véhicule WO2023228645A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-083882 2022-05-23
JP2022083882A JP2023172226A (ja) 2022-05-23 2022-05-23 車両用空調装置

Publications (1)

Publication Number Publication Date
WO2023228645A1 true WO2023228645A1 (fr) 2023-11-30

Family

ID=88918922

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/015937 WO2023228645A1 (fr) 2022-05-23 2023-04-21 Système de climatisation pour véhicule

Country Status (2)

Country Link
JP (1) JP2023172226A (fr)
WO (1) WO2023228645A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930951A (fr) * 1972-07-20 1974-03-19
JP2007278624A (ja) * 2006-04-07 2007-10-25 Denso Corp ヒートポンプサイクル
JP2020045068A (ja) * 2018-09-21 2020-03-26 サンデンホールディングス株式会社 車両用空調システム
US20220134845A1 (en) * 2019-02-25 2022-05-05 Hanon Systems Heat exchanger and vehicle air conditioning system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930951A (fr) * 1972-07-20 1974-03-19
JP2007278624A (ja) * 2006-04-07 2007-10-25 Denso Corp ヒートポンプサイクル
JP2020045068A (ja) * 2018-09-21 2020-03-26 サンデンホールディングス株式会社 車両用空調システム
US20220134845A1 (en) * 2019-02-25 2022-05-05 Hanon Systems Heat exchanger and vehicle air conditioning system

Also Published As

Publication number Publication date
JP2023172226A (ja) 2023-12-06

Similar Documents

Publication Publication Date Title
CN112074425B (zh) 车用热管理系统
JP5860361B2 (ja) 電動車両用熱管理システム
EP4122726A1 (fr) Système de pompe à chaleur pour véhicule
EP2349757B1 (fr) Procédé et système de refroidissement et de réchauffement
JP4597180B2 (ja) 車両用空調システム
KR101313593B1 (ko) 차량용 히트 펌프 시스템
CN111716987A (zh) 热系统、电动或混合动力车辆及用于运行热系统的方法
US20230382187A1 (en) Heat pump assembly with a chiller for battery-powered vehicles and methods of operating the heat pump assembly
CN114312205A (zh) 热管理系统、热管理系统的控制方法与电动汽车
JP2009291008A (ja) 電気駆動自動車の熱管理システム
JP2014037179A (ja) 電動車両用熱管理システム
JP2017171247A (ja) 車両用空調装置
WO2020184146A1 (fr) Climatiseur de véhicule
KR20180114388A (ko) 차량용 공조장치
KR20180114400A (ko) 차량용 공조장치
WO2023228645A1 (fr) Système de climatisation pour véhicule
WO2023203943A1 (fr) Dispositif de climatisation de véhicule
WO2023248714A1 (fr) Dispositif de climatisation pour véhicule
WO2023203942A1 (fr) Circuit de milieu thermique
WO2023248715A1 (fr) Système de climatisation pour véhicule
WO2023243367A1 (fr) Dispositif de climatisation pour véhicule
WO2023248713A1 (fr) Dispositif de climatisation pour véhicule
WO2021261320A1 (fr) Dispositif de refroidissement de véhicule
JP7361178B1 (ja) 車両用温調システム
WO2023140205A1 (fr) Dispositif de climatisation pour 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: 23811523

Country of ref document: EP

Kind code of ref document: A1