WO2023248714A1 - Dispositif de climatisation pour véhicule - Google Patents

Dispositif de climatisation pour véhicule Download PDF

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Publication number
WO2023248714A1
WO2023248714A1 PCT/JP2023/019687 JP2023019687W WO2023248714A1 WO 2023248714 A1 WO2023248714 A1 WO 2023248714A1 JP 2023019687 W JP2023019687 W JP 2023019687W WO 2023248714 A1 WO2023248714 A1 WO 2023248714A1
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WO
WIPO (PCT)
Prior art keywords
flow path
heat medium
heat
heat exchanger
temperature
Prior art date
Application number
PCT/JP2023/019687
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 WO2023248714A1 publication Critical patent/WO2023248714A1/fr

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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

Definitions

  • the present invention relates to a vehicle air conditioner.
  • the heat medium circuit in a conventional vehicle air conditioner supplies heat medium to the air heat exchanger in the HVAC (Heating, Ventilation, and Air Conditioning) unit in order to air condition the interior of the vehicle, while also passing heat from outside air to the air heat exchanger.
  • a heat medium is passed through an external heat exchanger (radiator) for the purpose of controlling the temperature of in-vehicle heat generating devices such as batteries and motors, and a heat medium is passed through a heat exchanger for controlling the temperature of in-vehicle heat generating devices such as batteries and motors.
  • the heat medium circuit 10 includes a high temperature heat medium flow path 20, a low temperature heat medium flow path 30, a heat storage flow path 40, an outdoor flow path 50, an air conditioning flow path 70, a tank 55, and a first flow path switching section as a flow path switching section. V1, a second flow path switching section V2, and a third flow path switching section V3.
  • the low-temperature heat medium flow path 30 includes a low-temperature heat exchanger 31 (cooling section) that is integrated with the evaporator 14 in the refrigerant circuit R and performs heat exchange between the heat medium and the refrigerant. While passing through the low-temperature heat exchanger 31, the heat medium cools down to a low temperature due to heat absorption by the refrigerant in the evaporator 14 in the refrigerant circuit R, and circulates.
  • a low-temperature heat exchanger 31 cooling section
  • the heat storage flow path 40 includes a first heat storage flow path 401 including a battery heat exchanger 41, and a second heat storage flow path 402 including a motor heat exchanger 42, an inverter heat exchanger 43, and a PCU heat exchanger 44. are connected via the second flow path switching section V2. Moreover, the first heat storage flow path 401 and the second heat storage flow path 402 can be made into mutually independent flow paths or connected flow paths by controlling the second flow path switching unit V2.
  • the outdoor flow path 50 includes an outdoor heat exchanger 45 that exchanges heat with outside air.
  • the air conditioning flow path 70 includes a first heat exchanger 81 and a second heat exchanger 82 that are arranged in the air conditioning unit 80 and perform heat exchange between the heat medium and the air blown into the vehicle interior, and an individual air conditioning unit 90. It includes a first individual heat exchanger 91 and a second individual heat exchanger 92 that exchange heat between the heat medium and the air blown for each sheet.
  • a relief valve 57 is provided near the inlet 52 on the path from the connection portion 28 to the inlet 52 of the tank 55.
  • a relief valve 58 is provided near the inlet 54 on the path from the connection portion 48 to the inlet 54 of the tank 55 .
  • the relief valve 57 or the relief valve 58 is opened, and the heat medium flows into the tank 55 through the inlet 52 or the inlet 54 from the flow path through which the high-temperature heat medium circulates.
  • the air conditioning unit 80 includes a suction port 83 that sucks air (outside air or inside air) into the air conditioning unit 80, a blower 87 that blows the air sucked from the suction port 83 into the air flow passage 84, and a blower 87 that is provided within the air flow passage 84.
  • An air mix damper 89 is provided to adjust the ratio of ventilation to the air filter 82.
  • the individual air conditioning unit 90 has a first individual heat exchanger 91 and a second individual heat exchanger 92 through which the heat medium circulating in the heat medium circuit 10 flows, and a first individual heat exchanger 91 and a second individual heat exchanger 92.
  • a three-way valve 95 (flow rate adjustment section) that can control the inflow of the heat medium and adjust the flow rate, and passes through either or both of the first individual heat exchanger 91 and the second individual heat exchanger 92. This air is blown into the vehicle interior.
  • the first individual heat exchanger 91 and the second individual heat exchanger 92 are introduced from separate and independent suction ports, and are provided in air flow passages through which air blown by the blower flows.
  • the heat medium whose temperature has been adjusted in one or both of the high temperature heat medium flow path 20 and the low temperature heat medium flow path 30 is transferred to the first flow path switching section V1, the second flow path switching section V2, and the third flow path switching section V1.
  • 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 (ECU) 200 that controls the entire vehicle, including drive control of the driving motor, inverter, and power control unit, and charge/discharge control of the battery, and transmits and receives information.
  • ECU vehicle controller
  • a microcomputer as an example of a computer including a processor can be applied to both the control unit 100 and the vehicle controller 200.
  • the control unit 100 includes a temperature sensor TC21 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 TC31 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; A temperature sensor TC90 detects the temperature of the heat medium flowing into the individual heat exchanger 91 and the second individual heat exchanger 92, and a battery temperature sensor TC41 detects the temperature of the battery (temperature of the battery itself, temperature of the battery heat exchanger 41).
  • the vehicle air conditioner 1 can operate in various modes, such as a heating mode, a cooling mode, and a dehumidification mode using the air conditioning unit 80 or the individual air conditioning unit 90, and a temperature control mode including cooling or warming up of in-vehicle equipment. Operation mode can be executed.
  • 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 air conditioner is used to adjust the air supplied to the vehicle interior to a target temperature or humidity and air condition the vehicle interior.
  • the refrigerant circulates as follows.
  • (1) First mode In the first mode, the heat medium heated in the high temperature heat exchanger 21 is circulated between the high temperature heat medium flow path 20 and the air conditioning flow path 70, and the second heat exchanger 82 is used to circulate the heat medium heated in the high temperature heat exchanger 21 into the vehicle interior.
  • the first individual heat exchanger 91 and the second individual heat exchanger 92 perform heating for each seat, and the low temperature heat medium in the low temperature heat medium flow path 30 flows through the first heat exchanger 81 to heat the vehicle interior.
  • This is a dehumidifying heating mode that dehumidifies the air.
  • a heat medium that does not exchange heat with the high temperature heat exchanger 21 or the low temperature heat exchanger 31 circulates. That is, the heat medium passes through the battery heat exchanger 41 by the third pump P3, flows into the outdoor flow path 50 via the second flow path switching part V2, and exchanges heat with the outside air in the outdoor heat exchanger 45. to dissipate heat.
  • the heat medium exiting the outdoor heat exchanger 45 passes through the PCU heat exchanger 44, the inverter heat exchanger 43, and the motor heat exchanger 42 in order via the second flow path switching section V2.
  • the circulation returning to the third pump P3 via the third flow path switching section V3 and the second flow path switching section V2 is repeated.
  • the first mode is mainly a state in which the operating condition of the vehicle air conditioner 1 is stable, that is, the first heat exchanger 81, the second heat exchanger 82, the first individual heat exchanger 91, and the second individual This mode is executed when the balance of the refrigerant circuit R is maintained only by heat absorption and heat radiation in the heat exchanger 92, high temperature heat exchanger 21, and low temperature heat exchanger 31.
  • the first flow path switching section is configured so that the heat storage flow path 40 and the outdoor flow path 50 are separated from the high temperature heat medium flow path 20, the low temperature heat medium flow path 30, and the air conditioning flow path 70 to form independent flow paths.
  • V1 the second flow path switching section V2, and the third flow path switching section V3.
  • control unit 100 transfers the high temperature heat medium flowing through the high temperature heat medium flow path 20 to the second heat exchanger 82, the first individual heat exchanger 91, and the second individual heat exchanger 92 of the air conditioning flow path 70.
  • the first flow path switching unit V1 and the three-way valves 85 and 95 are controlled so that the low temperature heat medium flowing through the low temperature heat medium flow path 30 flows to the first heat exchanger 81 of the air conditioning flow path 70 so that the low temperature heat medium flows.
  • the heat medium that has merged in the merging section 72 flows into the outdoor flow path 50 via the first flow path switching section V1, the third flow path switching section V3, and the second flow path switching section V2, and is transferred to the outdoor heat exchanger 45. It exchanges heat with the outside air and flows into the heat storage flow path 40 via the second flow path switching section V2.
  • the heat medium that has flowed into the second heat storage flow path 402 of the heat storage flow path 40 sequentially flows into the PCU heat exchanger 44, the inverter heat exchanger 43, and the motor heat exchanger 42, and then passes through the third flow path switching section V3.
  • the heat medium returns to the high-temperature heat medium flow path 20 via , and repeats the circulation of being pumped to the high-temperature heat exchanger 21 by the first pump P1.
  • the heat medium that has been cooled by exchanging heat with the refrigerant passing through the evaporator 14 in the low temperature heat exchanger 31 of the low temperature heat medium flow path 30 is transferred to the air conditioning flow path 70 via the first flow path switching section V1.
  • the air flows into the first heat exchanger 81 and exchanges heat with the air passing through the air flow path 84.
  • the heat medium that has exited the first heat exchanger 81 returns to the low temperature heat medium flow path 30 via the first flow path switching section V1 and the second flow path switching section V2, and is transferred to the low temperature heat exchanger by the second pump P2. 31, the circulation is repeated.
  • the second heat exchanger 82, the first individual heat exchanger 91, and the second individual heat exchanger 92 heat the air supplied into the vehicle interior for heating.
  • the air supplied into the vehicle interior can be dehumidified by the first heat exchanger 81.
  • variations in temperature among cells within the battery can be reduced.
  • the second mode is mainly executed when a predetermined period of time has passed since the vehicle air conditioner 1 was started and the air conditioning in the vehicle interior is in a stable state.
  • the PCU heat exchanger 44 and the inverter heat exchanger included in the second heat storage flow path 402 By passing through the heat exchanger 43 and the motor heat exchanger 42 in order, the heat generated or stored in each device can be used to continue dehumidifying and heating the vehicle interior.
  • the power consumption by the vehicle air conditioner 1 can be suppressed by lowering the output of the compressor 11 (for example, by operating it intermittently, lowering the rotational speed, temporarily stopping its operation, etc.) .
  • lowering the output of the compressor 11 for example, by operating it intermittently, lowering the rotational speed, temporarily stopping its operation, etc.
  • the refrigerant circuit R as a heat source and controls the temperature of the air inside the vehicle via the heat medium flowing through the heat medium circuit
  • the high temperature heat medium flow path 20 the low temperature heat medium
  • the heat storage flow path 40 and the outdoor flow path 50 are separated from the flow path 30 and the air conditioning flow path 70 to form independent flow paths.
  • a high temperature heat exchanger 21 and a low temperature heat exchanger 31 perform heat exchange between the refrigerant and the heat medium
  • a first heat exchanger 81 and a second heat exchanger 82 perform heat exchange with the air supplied into the vehicle interior.
  • the other on-vehicle equipment heat exchangers and outdoor heat exchangers are separated from the first individual heat exchanger 91 and the second individual heat exchanger 92.
  • the balance of the refrigerant circuit is maintained in the vehicle air conditioner that uses the refrigerant circuit as a heat source and controls the temperature of the air inside the vehicle via the heat medium flowing through the heat medium circuit.
  • the stable state of the refrigerant circuit can be maintained in the maintained operating state of the air conditioner. By maintaining the stable state of the refrigerant circuit, the comfort of air conditioning can be improved and power consumption can be reduced.
  • 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 storage flow path 41: Heat exchanger for battery
  • 42 Heat exchanger for motor
  • 43 Heat exchanger for inverter
  • 44 Heat exchanger for PCU
  • 45 outdoor heat exchanger
  • 50 outdoor flow path 55: tank
  • 70 air conditioning flow path
  • 80 air conditioning unit
  • 81 first heat exchanger
  • 82 second heat exchanger 85
  • 95 three-way valve
  • 90 Individual air conditioning unit
  • 91 First individual heat exchanger
  • 92 Second individual heat exchanger
  • R Refrigerant circuit
  • V1 First flow path switching section
  • V2 Second flow path switching section
  • V3 Third flow path switching Department

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

Abstract

Le problème décrit par la présente invention est de permettre à un circuit de fluide frigorigène de maintenir un état stable pendant un état de fonctionnement de climatiseur où l'équilibre dans le circuit de fluide frigorigène est maintenu. La solution selon l'invention porte sur un dispositif de climatisation de véhicule (1) comprenant : un circuit de fluide frigorigène (R) ; un circuit de milieu thermique (10) qui comprend un trajet d'écoulement de milieu thermique à haute température (20) à travers lequel s'écoule un milieu thermique à haute température chauffé par la chaleur dissipée par le circuit de fluide frigorigène, et un trajet d'écoulement de milieu thermique à basse température (30) à travers lequel s'écoule un milieu thermique à basse température refroidi par absorption de chaleur du circuit de fluide frigorigène ; et une unité de climatisation (80) dans laquelle un échangeur de chaleur air-milieu thermique disposé sur le circuit de milieu thermique est disposé dans un trajet d'écoulement d'air pour l'alimentation de la cabine de véhicule. Le circuit de milieu thermique est au moins pourvu d'un échangeur de chaleur externe (45) pour l'échange de chaleur au moins entre l'air extérieur et un milieu thermique et est également pourvu d'un moyen de commutation de trajet d'écoulement (V2) pour séparer l'échangeur de chaleur externe du trajet d'écoulement de milieu thermique à haute température et du trajet d'écoulement de milieu thermique à basse température.
PCT/JP2023/019687 2022-06-22 2023-05-26 Dispositif de climatisation pour véhicule WO2023248714A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022100455A JP2024001656A (ja) 2022-06-22 2022-06-22 車両用空調装置
JP2022-100455 2022-06-22

Publications (1)

Publication Number Publication Date
WO2023248714A1 true WO2023248714A1 (fr) 2023-12-28

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Application Number Title Priority Date Filing Date
PCT/JP2023/019687 WO2023248714A1 (fr) 2022-06-22 2023-05-26 Dispositif de climatisation pour véhicule

Country Status (2)

Country Link
JP (1) JP2024001656A (fr)
WO (1) WO2023248714A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012035812A (ja) * 2010-08-11 2012-02-23 Hitachi Ltd 車両用空調システム
JP2014201224A (ja) * 2013-04-05 2014-10-27 株式会社デンソー 車両用熱管理システム
JP2020142789A (ja) * 2019-02-28 2020-09-10 株式会社デンソー 熱管理システム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012035812A (ja) * 2010-08-11 2012-02-23 Hitachi Ltd 車両用空調システム
JP2014201224A (ja) * 2013-04-05 2014-10-27 株式会社デンソー 車両用熱管理システム
JP2020142789A (ja) * 2019-02-28 2020-09-10 株式会社デンソー 熱管理システム

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