JP2007069733A - Heating element cooling system using air conditioner for vehicle - Google Patents

Heating element cooling system using air conditioner for vehicle Download PDF

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Publication number
JP2007069733A
JP2007069733A JP2005258717A JP2005258717A JP2007069733A JP 2007069733 A JP2007069733 A JP 2007069733A JP 2005258717 A JP2005258717 A JP 2005258717A JP 2005258717 A JP2005258717 A JP 2005258717A JP 2007069733 A JP2007069733 A JP 2007069733A
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JP
Japan
Prior art keywords
heat exchanger
refrigerant
heating element
air conditioner
cooling
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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.)
Pending
Application number
JP2005258717A
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Japanese (ja)
Inventor
Hiroyuki Ida
Kenji Iijima
Akihito Kuroda
Nobuhiko Suzuki
博之 井田
伸彦 鈴木
健次 飯島
亮人 黒田
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Valeo Thermal Systems Japan Corp
株式会社ヴァレオサーマルシステムズ
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Application filed by Valeo Thermal Systems Japan Corp, 株式会社ヴァレオサーマルシステムズ filed Critical Valeo Thermal Systems Japan Corp
Priority to JP2005258717A priority Critical patent/JP2007069733A/en
Publication of JP2007069733A publication Critical patent/JP2007069733A/en
Application status is Pending legal-status Critical

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00Supplying electric power to auxiliary equipment of vehicles
    • B60L1/02Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00899Controlling the flow of liquid in a heat pump system
    • B60H1/00914Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant does not change and there is a bypass of the condenser
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/02Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/03Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant
    • B60H1/039Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant from air leaving the interior of the vehicle, i.e. heat recovery
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00Electric propulsion with power supplied within the vehicle
    • B60L50/50Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64Constructional details of batteries specially adapted for electric vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H2001/00949Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising additional heating/cooling sources, e.g. second evaporator
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/54Drive Train control parameters related to batteries
    • B60L2240/545Temperature
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7038Energy storage management
    • Y02T10/705Controlling vehicles with one battery or one capacitor only

Abstract

[PROBLEMS] To efficiently cool a heating element such as a battery and improve heating performance in a vehicle that does not use an engine as a driving source for traveling or has a means for reducing driving of the engine. .
A heating element cooling system for cooling an in-vehicle heating element using an air conditioner for vehicles that performs air conditioning using a phase change of a refrigerant, and is discharged from the passenger compartment during heating. Means for absorbing heat of the refrigerant in a heat exchanger disposed in the air, and means for absorbing heat of the refrigerant in a heat exchanger thermally connected to the heat generator when the heat generator is required to be cooled. [Selection] Figure 1

Description

  The present invention relates to a system for cooling a heating element such as a battery, an inverter, and a motor mounted on an automobile by using an air conditioner, and particularly suitable for an electric vehicle, a fuel cell vehicle, a hybrid vehicle, an idling stop vehicle, and the like. It is related to what is used for.

  In an air conditioner mounted on a normal engine traveling vehicle, the heat generated by the engine is used to generate warm air. For example, a heater core that radiates engine cooling water in conditioned air is generally provided. However, in an electric vehicle not equipped with an engine, a hybrid vehicle with a low engine driving rate, an idling stop vehicle, etc., there is no or little heat generated by the engine, and thus a device for ensuring sufficient heating performance is required. .

  In electric vehicles, hybrid vehicles, and the like, special consideration is required for cooling of heating elements such as batteries, inverters, and motors. For example, the optimum temperature of the battery is approximately room temperature, but due to heat generated by charging and discharging, the temperature is always higher than room temperature during use, and this high temperature state adversely affects the life of the device.

The following are disclosed as conventional techniques related to cooling of an air conditioner and a battery. In this prior art, a heat source having a heat radiating part of an engine and a heat radiating part of a drive motor and an outdoor heat exchanger are connected in the same duct, the outdoor heat exchanger is provided with a reversible operation fan, and the outdoor heat exchanger in the duct This is an automotive air conditioner that is provided with an intake port and an exhaust port in a duct on the opposite side of the heat source, and that performs intake / exhaust switching with a switching damper (Patent Document 1). According to this structure, it is possible to perform cooling by air cooling in the duct in which the heat source is arranged during both heating and cooling, and when heat is absorbed by the outdoor heat exchanger during heating, that is, from the heat source. Heat can be used.
JP-A-11-198637

  However, when the outdoor heat exchanger, the radiator for the battery and the electric device, and the radiator for the engine are arranged in the same duct in the one disclosed in Patent Document 1, the radiator for the battery and the electric device has the outdoor heat. Since it is on the downstream side of the exchanger, the air warmed by this heat dissipation hits the radiator for the battery or the electric equipment during cooling, that is, when the outdoor heat exchanger releases heat, and the battery or the like cannot be cooled sufficiently. I was worried. In addition, since the outside air temperature itself becomes high in summer, it is impossible to cool the battery or the like to the optimum temperature even if the influence of the outdoor heat exchanger of the air conditioner or the radiator for the engine can be eliminated.

  Accordingly, the present invention enables efficient cooling of a heating element such as a battery and improvement of heating performance in a vehicle that does not use an engine as a driving source for traveling or has a means for reducing driving thereof. It is an object to plan.

  In order to solve the above-described problems, the present invention provides a heating element cooling system that cools an in-vehicle heating element using a vehicle air conditioner that performs air conditioning using a phase change of a refrigerant. And means for absorbing heat into the refrigerant in the air discharged from the passenger compartment, and means for absorbing heat into the refrigerant in a heat exchanger thermally connected to the heating element when the heating element needs to be cooled. (Claim 1).

  By performing the heat absorption of the refrigerant in the exhaust air warmed in the passenger compartment during heating as in this configuration, it is possible to improve the COP of the refrigeration cycle rather than the heat absorption in the outside air in winter and the like. Heating performance can be ensured. When cooling of a heating element such as a battery is required, the refrigerant absorbs heat in a heat exchanger that is in a state of being thermally connected to the heating element, so that a larger cooling capacity than that obtained by air cooling or the like can be obtained. Can do. The state in which the heating element and the heat exchanger are thermally connected is a state in which the cooling action due to heat absorption in the heat exchanger is likely to reach the heating element, and the heating element and the heat exchanger are directly or A state where they are in contact with each other through a member having a high thermal conductivity, or a state where they are arranged in the vicinity even if they are not in contact with each other. Moreover, as a heat generating body, a battery, an inverter, a motor, etc. are suitable.

  As shown in FIG. 1, the specific configuration of the first aspect includes a compressor 2 that compresses the refrigerant, an outdoor heat exchanger 3 that exchanges heat between the compressed refrigerant and the outside air, and the compressed refrigerant into the vehicle interior. Heating indoor heat exchanger 4 for exchanging heat with the blown air, decompression means 5 and 6 for decompressing the condensed refrigerant, and cooling indoor heat exchange for exchanging the decompressed refrigerant with the air blown into the vehicle interior 7. Exhaust heat exchanger 8 for exchanging heat of the decompressed refrigerant with the air exhausted from the passenger compartment, the decompressed refrigerant flows in, and is integrated with or disposed in the vicinity of the heating element 9. And the heat generating element heat exchanger 10 and the refrigerant flow path changing means 15 and 16 for changing the flow path of the refrigerant based on a predetermined condition (Claim 2).

  According to this configuration, the refrigerant compressed by the compressor 2 condenses (dissipates heat) in the outdoor heat exchanger 3 or the heating indoor heat exchanger 4 and is depressurized, and then the cooling indoor heat exchanger 7 or the exhaust gas. It evaporates (endothermic) in the heat exchanger 8 or the heating element heat exchanger 10. Which heat exchanger performs heat radiation and heat absorption is appropriately changed by the refrigerant flow path changing means 15 and 16. The refrigerant flow path changing means 15 and 16 are operated by a predetermined control unit based on the operation mode of the air conditioner, the heating element temperature, the outside air temperature, the passenger compartment temperature, and other predetermined conditions.

  Moreover, in the structure of the said Claim 2, the said outdoor heat exchanger 3 and the said indoor heat exchanger 4 are arrange | positioned in parallel, the said indoor heat exchanger 7 for cooling, and the said exhaust heat exchanger 8 and the heating element heat exchanger 9 are preferably arranged in parallel (Claim 3).

  With this configuration, the refrigerant can be selectively condensed (radiated) in the outdoor heat exchanger 3 or the heating indoor heat exchanger 4, and the refrigerant can be evaporated (heat absorbed) in the cooling indoor heat exchanger 7 or the exhaust heat. It can be performed selectively (both are possible) in the exchanger 8 or the heating element heat exchanger 10.

  Further, as another specific configuration of the first aspect, as shown in FIG. 5, a compressor 2 that compresses the refrigerant, an outdoor heat exchanger 3 that exchanges heat between the compressed refrigerant and the outside air, and a refrigerant after compression Heating indoor heat exchanger 4 for exchanging heat with the air blown into the vehicle interior, decompression means 5 and 6 for decompressing the condensed refrigerant, and cooling for exchanging the heat of the decompressed refrigerant with the air blown into the vehicle interior An indoor heat exchanger 7, an exhaust heat exchanger 8 configured to exchange heat with the air discharged from the passenger compartment and to be integrated with the heating element 9 or disposed in the vicinity thereof; And a refrigerant flow path changing means 15 for changing the flow path of the refrigerant based on the above conditions.

  This configuration is different from the configuration of claim 2 in that the heating element heat exchanger 10 does not exist, and the exhaust heat exchanger 8 is used for both air conditioning and heating element cooling. is there. FIG. 5 shows a case where the positional relationship between the heating element 9 and the exhaust heat exchanger 8 is non-contact. However, as shown in FIGS. 14 and 15, the heating element 9 and the exhaust heat exchanger 8 are connected to each other. An integrated structure may be used.

  Further, in the configuration according to claim 4, the outdoor heat exchanger 3 and the heating indoor heat exchanger 4 are arranged in parallel, and the cooling indoor heat exchanger 7 and the exhaust heat exchanger are arranged. 8 are preferably arranged in parallel (claim 5).

  With this configuration, the refrigerant can be selectively condensed (radiated) in the outdoor heat exchanger 3 or the heating indoor heat exchanger 4, and the refrigerant can be evaporated (heat absorbed) in the cooling indoor heat exchanger 7 or the exhaust heat. This can be done selectively in the exchanger 8.

As another specific configuration of the first aspect, as shown in FIG. 9, a compressor 2 that compresses the refrigerant, an outdoor heat exchanger 3 that exchanges heat between the compressed refrigerant and the outside air, and a compressed refrigerant Heat exchanger 31 that exchanges heat with engine cooling water, heater core 36 that exchanges heat between engine cooling water and air blown into the passenger compartment, decompression means 5 and 6 for decompressing the condensed refrigerant, and refrigerant after decompression Cooling indoor heat exchanger 7 for exchanging heat with air blown into the vehicle interior, exhaust heat exchanger 8 for exchanging heat of the decompressed refrigerant with air exhausted from the vehicle interior, refrigerant after decompression flows in, A heating element heat exchanger 10 configured integrally with the heating element 9 or disposed in the vicinity thereof, and refrigerant flow path changing means 15, 33, 34 for changing the flow path of the refrigerant based on a predetermined condition. (Claim 6).

  This configuration is suitably used for an automobile having an engine, particularly a hybrid vehicle or an idling stop vehicle, and includes a heater core 36 that heats conditioned air by heat dissipation of the engine cooling water, and heats the engine cooling water and the refrigerant. An inter-medium heat exchanger 31 to be exchanged is provided. The inter-medium heat exchanger 31 can heat the engine coolant with the compressed refrigerant when the engine coolant temperature is insufficient. Moreover, the heat generating body heat exchanger 10 is provided similarly to the structure of the said Claim 2.

  In the configuration according to claim 6, the outdoor heat exchanger 3 and the inter-medium heat exchanger 31 are arranged in parallel, the cooling indoor heat exchanger 7, and the exhaust heat exchanger 8. And the heating element heat exchanger 10 are preferably arranged in parallel (Claim 7).

  With this configuration, the refrigerant can be selectively condensed (radiated) in the outdoor heat exchanger 3 or the inter-medium heat exchanger 31, and the refrigerant can be evaporated (heat absorbed) in the cooling indoor heat exchanger 7 or the exhaust heat exchange. This can be done selectively in the vessel 8 or the exhaust heat exchanger 10.

  As another specific configuration of the first aspect, as shown in FIG. 13, a compressor 2 that compresses the refrigerant, an outdoor heat exchanger 3 that exchanges heat between the compressed refrigerant and the outside air, and a compressed refrigerant Heat exchanger 31 that exchanges heat with engine cooling water, heater core 36 that exchanges heat between engine cooling water and air blown into the passenger compartment, decompression means 5 and 6 for decompressing the condensed refrigerant, and refrigerant after decompression Or a cooling indoor heat exchanger 7 for exchanging heat with the air blown into the vehicle interior, heat exchange of the decompressed refrigerant with the air exhausted from the vehicle interior, and an integral construction with the heating element 9 or An exhaust heat exchanger 8 disposed in the vicinity of the exhaust heat exchanger 8 and a refrigerant flow path changing means 15 for changing the flow path of the refrigerant based on a predetermined condition are included (claim 8).

  This configuration is also preferably used for an automobile having an engine, particularly a hybrid vehicle or an idling stop vehicle. Similarly to the configuration of the above-described fourth aspect, the heater core 36 and the inter-medium heat exchanger 31 through which engine cooling water circulates. In addition, the heating element heat exchanger 10 is not provided as in the configuration of the second aspect.

  In the configuration according to claim 8, the outdoor heat exchanger 3 and the inter-medium heat exchanger 31 are arranged in parallel, and the cooling indoor heat exchanger 7 and the exhaust heat exchanger 8 are arranged. Are preferably arranged in parallel (claim 9).

  With this configuration, the refrigerant can be selectively condensed (radiated) in the outdoor heat exchanger 3 or the inter-medium heat exchanger 31, and the refrigerant can be evaporated (heat absorbed) in the cooling indoor heat exchanger 7 or the exhaust heat exchange. This can be done selectively in the vessel 8.

  Further, in the configuration according to any one of claims 3, 5, 7, and 9, the decompression means includes a first decompression means 5 provided on an inlet side of the cooling indoor heat exchanger, and the exhaust heat. A second pressure reducing means 6 provided on the inlet side of the exchanger or the heat generating body heat exchanger, and means for changing the throttle amount of the second pressure reducing means 6 according to the temperature of the heat generating body 9. It is preferable to comprise (Claim 10).

  For example, as the temperature of the heating element 9 is higher, the cooling capacity of the heating element heat exchanger 10 or the exhaust heat exchanger 8 can be increased by increasing the opening of the second decompression device 6. Thereby, it becomes possible to maintain the heat generating body 9 in the vicinity of optimal temperature (for example, normal temperature).

  In any one of claims 1 to 10, it is preferable that the heating element is at least one of a battery, an inverter, and a motor (claim 11).

  According to the present invention, in an electric vehicle, a hybrid vehicle, and the like, it is possible to achieve efficient cooling of a heating element such as a battery and improvement in heating performance.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the different embodiments, the description of the same or similar parts is omitted.

  The vehicle air conditioner 1 according to the present embodiment shown in FIG. 1 can be used particularly preferably in an electric vehicle, a fuel cell vehicle, etc., which does not have an engine and uses only an electric motor as a travel drive source. Compressor 2 for compressing the refrigerant, outdoor heat exchanger 3 for exchanging heat of the compressed refrigerant with the outside air, indoor heat exchanger 4 for heating for exchanging the compressed refrigerant with the air blown into the vehicle, and refrigerant for condensation The first decompression means 5 and the second decompression means 6 for decompressing the refrigerant, the indoor heat exchanger 7 for cooling for exchanging heat of the decompressed refrigerant with the air blown into the vehicle, and the decompressed refrigerant are discharged from the interior of the vehicle An exhaust heat exchanger 8 for exchanging heat with air, a heating element heat exchanger 10 for exchanging heat of the decompressed refrigerant with a heating element 9 such as a battery, an inverter or a motor, a three-way valve 15 as means for changing the refrigerant flow path, 16, with check valve 17 Constructed. The heating element 9 and the heating element heat exchanger 10 are integrally formed directly or via a member having high thermal conductivity.

  The vehicle air conditioner 1 having the above-described configuration is a normal heat pump cycle (the indoor heat exchanger is a condenser and the outdoor heat exchanger is an evaporator during heating, and the indoor heat exchanger is an evaporator and the outdoor heat exchanger is condensed during cooling. In particular, the heating performance can be improved as compared with the one in which the refrigerant flow path is switched so as to be a heater. That is, during heating, as shown in FIG. 2, a refrigerant circulation path comprising the compressor 2 → the heater heat exchanger 4 → the second decompression means 6 → the exhaust heat exchanger 8 → the compressor 2 is configured as necessary. During heating, the exhaust heat exchanger 8 functions as an evaporator, so that heat necessary for evaporation of the refrigerant can be absorbed from the air in the vehicle that is hotter than the outside air, so COP (heating performance) And the possibility of frost formation in the exhaust heat exchanger 8 as an evaporator is reduced.

  In the vehicle air conditioner 1 according to the present embodiment, when heating and when the heating element 9 needs to be cooled, as shown in FIG. 3, the compressor 2 → the heat exchanger 4 for the heater → the second decompression means. A circulation path composed of 6 → heating element heat exchanger 10 → compressor 2 is formed. Whether or not the heating element 9 needs to be cooled is determined by an appropriate method by a temperature sensor that detects the temperature of the heating element 9, an ECU that analyzes the detection value by the temperature sensor, and the like. Thereby, since it can be made to absorb heat in the heat generating body heat exchanger 10, while being able to cool the heat generating body 9 effectively, the outstanding heating performance can be maintained.

  Further, FIG. 4 shows a state at the time of cooling and when the heating element 9 needs to be cooled. At this time, the vehicle air conditioner 1 includes the compressor 2 → the outdoor heat exchanger 3 → the first pressure reducing means 5 → the cooling indoor heat exchanger 7 → the circulation path including the compressor 2, and the compressor 2 → outdoor heat. The circulation path composed of the exchanger 3 → the second decompression means 6 → the heating element heat exchanger 10 → the compressor 2 is configured. Thus, the heat absorption is performed not only in the cooling indoor heat exchanger 7 but also in the heating element heat exchanger 10, so that the heating element 9 can be effectively cooled during the cooling operation in summer.

  The vehicle air conditioner 20 according to the present embodiment shown in FIG. 5 can be used particularly preferably in an electric vehicle, a fuel cell vehicle, and the like that do not have an engine and use only an electric motor as a driving source for traveling. Compressor 2, outdoor heat exchanger 3, heating indoor heat exchanger 4, first decompression means 5, second decompression means 6, cooling indoor heat exchanger 7 and exhaust having the same functions as in the first embodiment A heat exchanger 8, a three-way valve 15, and a check valve 17 are provided. Then, as shown in FIG. 6, the blower 22, the exhaust heat exchanger 8, and the heating element 9 are disposed in the exhaust duct 21 that connects the vehicle interior and the outside of the vehicle, and the heating element 9 is downstream of the exhaust heat exchanger 8. It is arranged to be on the side.

  In the vehicle air conditioner 20 configured as described above, when heating or when the heating element 9 needs to be cooled, as shown in FIG. 7, the compressor 2 → the heating indoor heat exchanger 4 → the second decompression means 6 → the exhaust heat exchange. A circulation path composed of the vessel 8 → the compressor 2 is formed. Thus, the heat absorption of the refrigerant is performed by the exhaust heat exchanger 8, so that the exhaust air in the exhaust duct 21 is cooled, and the heating element 9 disposed downstream in the ventilation direction of the exhaust heat exchanger 8 is cooled. The exhaust air is effectively cooled.

  Further, FIG. 8 shows a state during cooling and when the heating element 9 needs to be cooled. At this time, the vehicle air conditioner 20 includes the compressor 2 → the outdoor heat exchanger 3 → the first decompression means 5 → the cooling indoor heat exchanger 7 → the circulation path including the compressor 2, and the compressor 2 → outdoor heat. A circulation path composed of the exchanger 3 → the second decompression means 6 → the exhaust heat exchanger 8 → the compressor 2 is configured. Thus, the heat absorption is performed not only in the cooling indoor heat exchanger 7 but also in the exhaust heat exchanger 8, so that the heating element 9 can be effectively cooled even during the cooling operation in summer.

  The vehicle air conditioner 30 according to the present embodiment shown in FIG. 9 is particularly preferably used in a hybrid vehicle that uses both the engine and the electric motor as a driving source for traveling, and includes the compressor 2 and the outdoor heat exchanger 3. The inter-medium heat exchanger 31 for exchanging heat between the compressed refrigerant and the engine cooling water, the heater cooling water radiator 36 for exchanging heat between the air blown into the vehicle and the engine cooling water, and the first decompression means 5 , Second decompression means 6, indoor heat exchanger 7 for cooling, exhaust heat exchanger 8, heating element 9, heating element heat exchanger 10, three-way valve 15, check valve 17, and on-off valves 33 and 34. Configured. An engine, a radiator (not shown), and the like are connected to the coolant circulation cycle 35 to which the inter-medium heat exchanger 31 and the heater coolant radiator 36 are connected.

  The vehicle air conditioner 30 having the above configuration can particularly improve the heating performance as compared with the conventional configuration. That is, as shown in FIG. 10, during the heating, a refrigerant circulation path comprising the compressor 2 → the inter-medium heat exchanger 31 → the second decompression means 6 → the exhaust heat exchanger 8 → the compressor 2 is configured. As a result, the heat required for evaporation of the refrigerant can be absorbed from the air in the interior of the vehicle, which is higher than the outside air, so that COP (heating performance) is improved and the exhaust heat exchanger as an evaporator The possibility that frosting will occur in 8 is reduced. Further, when the amount of heat of the engine coolant that is the heat source of the heater coolant radiator 36 is insufficient, the engine coolant can be warmed by sending the compressed refrigerant to the inter-medium heat exchanger 31 ( When the heat quantity of the engine cooling water is sufficient, the compressed refrigerant may be sent to the outdoor heat exchanger 3).

  In the vehicle air conditioner 30 according to this embodiment, when heating and when the heating element 9 needs to be cooled, as shown in FIG. 11, the compressor 2 → the heat exchanger 31 between mediums (or the outdoor heat exchanger). 3) → the second decompression means 6 → the heating element heat exchanger 10 → the circulation path composed of the compressor 2 is formed. Thereby, since it can be made to absorb heat in the heat generating body heat exchanger 10, while being able to cool the heat generating body 9 effectively, the outstanding heating performance can be maintained.

  Further, FIG. 12 shows a state during cooling and when the heating element 9 needs to be cooled. At this time, the vehicle air conditioner 30 includes the compressor 2 → the outdoor heat exchanger 3 (the heat exchanger 31 between the medium when the dehumidifying heating and the cooling water temperature are insufficient, etc.) → the first decompression means 5 → the cooling room. A circulation path composed of the heat exchanger 7 → the compressor 2 and the compressor 2 → the outdoor heat exchanger 3 (or the inter-medium heat exchanger 31) → the second decompression means 6 → the heating element heat exchanger 10 → the compressor 2 A circulation path consisting of Thus, the heat absorption is performed not only in the cooling indoor heat exchanger 7 but also in the heating element heat exchanger 10, so that the heating element 9 can be effectively cooled during the cooling operation in summer. Moreover, you may make it flow a refrigerant | coolant simultaneously also to the exhaust heat exchanger 8 as needed.

  The vehicle air conditioner 40 according to the present embodiment shown in FIG. 13 is particularly preferably used in a hybrid vehicle using both the engine and the electric motor as a driving source for traveling. The compressor 2 and the outdoor heat exchanger 3 are used. , Medium heat exchanger 31, heater core 36, first decompression means 5, second decompression means 6, cooling indoor heat exchanger 7, exhaust heat exchanger 8, heating element 9, three-way valve 15, check valve 17 and open / close valves 33 and 34 are provided. Further, the exhaust heat exchanger 8 and the heating element 9 are arranged in the exhaust duct 21 as shown in FIG.

  Even with such a configuration, the heating element 9 can be effectively cooled by the exhaust air in the exhaust duct 21 by sending the decompressed refrigerant to the exhaust heat exchanger 8 as in the second embodiment. it can.

  The vehicle air conditioner 50 according to the present embodiment shown in FIG. 14 is particularly suitable for use in electric vehicles, fuel cell vehicles, and the like that do not have an engine and use only an electric motor as a driving source for travel. Machine 2, outdoor heat exchanger 3, first decompression means 5, second decompression means 6, cooling indoor heat exchanger 7, and heating element cooling unit 55 installed in exhaust duct 21. ing. As shown in FIG. 15, the heating element cooling unit 55 is formed by integrally forming the exhaust heat exchanger 8 and the heating element 9 via a heat conducting member 56 made of aluminum or the like.

  Even with such a configuration, as in the second or fourth embodiment, by sending the reduced-pressure refrigerant to the exhaust heat exchanger 8, the heat of the heating element 9 is transferred to the exhaust heat exchanger 8 via the heat conducting member 56. Therefore, the heating element 9 can be effectively cooled.

FIG. 1 is a diagram illustrating a configuration of a vehicle air conditioner according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating a heating state in the first embodiment. FIG. 3 is a diagram illustrating a state during heating and cooling of a heating element in the first embodiment. FIG. 4 is a diagram illustrating a state during cooling and cooling of the heating element in the first embodiment. FIG. 5 is a diagram illustrating a configuration of a vehicle air conditioner according to a second embodiment of the present invention. FIG. 6 is a diagram illustrating a structure inside the exhaust duct in the vehicle air conditioner according to the second embodiment. FIG. 7 is a diagram illustrating a heating state in the second embodiment. FIG. 8 is a diagram illustrating a state during cooling in the second embodiment. FIG. 9 is a diagram illustrating a configuration of a vehicle air-conditioning apparatus according to Embodiment 3 of the present invention. FIG. 10 is a diagram illustrating a heating state in the third embodiment. FIG. 11 is a diagram illustrating a state at the time of heating and cooling of a heating element in the third embodiment. FIG. 12 is a diagram illustrating a state when cooling and cooling a heating element in the third embodiment. FIG. 13 is a diagram showing a configuration of a vehicle air conditioner according to Embodiment 4 of the present invention. FIG. 14 is a diagram illustrating a configuration of a vehicle air conditioner according to Embodiment 5 of the present invention. FIG. 15 is a diagram illustrating the structure of the heating element cooling unit in the vehicle air conditioner according to the fifth embodiment.

Explanation of symbols

1, 20, 30, 40, 50 Vehicle air conditioner 2 Compressor 3 Outdoor heat exchanger 4 Heating indoor heat exchanger 5 First decompression means 6 Second decompression means 7 Cooling indoor heat exchanger 8 Exhaust heat Exchanger 9 Heating element 10 Heating element heat exchanger 21 Exhaust duct 31 Heat exchanger between medium 36 Cooling water radiator for heater 55 Heating element cooling unit 56 Heat conduction member

Claims (11)

  1. A heating element cooling system that cools an in-vehicle heating element using a vehicle air conditioner that performs air conditioning using the phase change of the refrigerant,
    Means for absorbing heat of the refrigerant in the heat exchanger disposed in the air discharged from the passenger compartment during heating;
    Means for absorbing heat of the refrigerant in a heat exchanger thermally connected to the heating element when the heating element needs to be cooled;
    A heating element cooling system using a vehicle air conditioner.
  2. A compressor for compressing the refrigerant,
    An outdoor heat exchanger that exchanges heat between the compressed refrigerant and the outside air,
    A heating indoor heat exchanger that exchanges heat between the compressed refrigerant and the air blown into the passenger compartment,
    Decompression means for decompressing the condensed refrigerant,
    A cooling indoor heat exchanger that exchanges heat between the decompressed refrigerant and the air blown into the passenger compartment,
    An exhaust heat exchanger for exchanging heat between the decompressed refrigerant and the air exhausted from the passenger compartment,
    A refrigerant after depressurization flows in and is configured integrally with the heating element or arranged near the heating element heat exchanger,
    Refrigerant flow path changing means for changing the flow path of the refrigerant based on a predetermined condition,
    A heating element cooling system using the vehicle air conditioner according to claim 1, comprising:
  3. The outdoor heat exchanger and the heating indoor heat exchanger are arranged in parallel,
    The heating element cooling system using a vehicle air conditioner according to claim 2, wherein the cooling indoor heat exchanger, the exhaust heat exchanger, and the heating element heat exchanger are arranged in parallel. .
  4. A compressor for compressing the refrigerant,
    An outdoor heat exchanger that exchanges heat between the compressed refrigerant and the outside air,
    A heating indoor heat exchanger that exchanges heat between the compressed refrigerant and the air blown into the passenger compartment,
    Decompression means for decompressing the condensed refrigerant,
    A cooling indoor heat exchanger that exchanges heat between the decompressed refrigerant and the air blown into the passenger compartment,
    Exhaust heat exchanger configured to exchange heat with the air discharged from the passenger compartment after decompression, and to be configured integrally with the heating element or in the vicinity thereof,
    Refrigerant flow path changing means for changing the flow path of the refrigerant based on a predetermined condition,
    The heating element cooling system using the vehicle air conditioner according to claim 1.
  5. The outdoor heat exchanger and the heating indoor heat exchanger are arranged in parallel,
    The heating element cooling system using a vehicle air conditioner according to claim 4, wherein the indoor heat exchanger for cooling and the exhaust heat exchanger are arranged in parallel.
  6. A compressor for compressing the refrigerant,
    An outdoor heat exchanger that exchanges heat between the compressed refrigerant and the outside air,
    An inter-medium heat exchanger that exchanges heat between the compressed refrigerant and engine coolant,
    A heater core for exchanging heat between engine coolant and air blown into the passenger compartment,
    Decompression means for decompressing the condensed refrigerant,
    A cooling indoor heat exchanger that exchanges heat between the decompressed refrigerant and the air blown into the passenger compartment,
    An exhaust heat exchanger for exchanging heat between the decompressed refrigerant and the air exhausted from the passenger compartment,
    A refrigerant after depressurization flows in and is configured integrally with the heating element or arranged near the heating element heat exchanger,
    Refrigerant flow path changing means for changing the flow path of the refrigerant based on a predetermined condition,
    A heating element cooling system using the vehicle air conditioner according to claim 1, comprising:
  7. The outdoor heat exchanger and the inter-medium heat exchanger are arranged in parallel,
    The heating element cooling system using a vehicle air conditioner according to claim 6, wherein the indoor heat exchanger for cooling, the exhaust heat exchanger, and the heating element heat exchanger are arranged in parallel. .
  8. A compressor for compressing the refrigerant,
    An outdoor heat exchanger that exchanges heat between the compressed refrigerant and the outside air,
    An inter-medium heat exchanger that exchanges heat between the compressed refrigerant and engine coolant,
    A heater core for exchanging heat between engine coolant and air blown into the passenger compartment,
    Decompression means for decompressing the condensed refrigerant,
    A cooling indoor heat exchanger that exchanges heat between the decompressed refrigerant and the air blown into the passenger compartment,
    Exhaust heat exchanger configured to exchange heat with the air discharged from the passenger compartment after decompression, and to be configured integrally with the heating element or in the vicinity thereof,
    Refrigerant flow path changing means for changing the flow path of the refrigerant based on a predetermined condition,
    The heating element cooling system using the vehicle air conditioner according to claim 1.
  9. The outdoor heat exchanger and the inter-medium heat exchanger are arranged in parallel,
    The heating element cooling system using a vehicle air conditioner according to claim 8, wherein the indoor heat exchanger for cooling and the exhaust heat exchanger are arranged in parallel.
  10. The pressure reducing means includes a first pressure reducing means provided on the inlet side of the cooling indoor heat exchanger, and a second pressure reducing means provided on the inlet side of the exhaust heat exchanger or the heating element heat exchanger. And consist of
    The vehicle air conditioner according to any one of claims 3, 5, 7, and 9, further comprising means for changing a throttle amount of the second decompression means in accordance with a temperature of the heating element. Heating element cooling system using
  11.   The heating element cooling system using a vehicle air conditioner according to claim 1, wherein the heating element is at least one of a battery, an inverter, and a motor.
JP2005258717A 2005-09-07 2005-09-07 Heating element cooling system using air conditioner for vehicle Pending JP2007069733A (en)

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