CN113316522A - Air conditioner for vehicle - Google Patents
Air conditioner for vehicle Download PDFInfo
- Publication number
- CN113316522A CN113316522A CN201980088852.1A CN201980088852A CN113316522A CN 113316522 A CN113316522 A CN 113316522A CN 201980088852 A CN201980088852 A CN 201980088852A CN 113316522 A CN113316522 A CN 113316522A
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- heat
- heat medium
- flow path
- air
- refrigerant
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- 239000003507 refrigerant Substances 0.000 claims description 104
- 238000004378 air conditioning Methods 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 6
- 230000020169 heat generation Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 32
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000006096 absorbing agent Substances 0.000 description 16
- 238000001816 cooling Methods 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
-
- 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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
- B60H1/00921—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant does not change and there is an extra subcondenser, e.g. in an air duct
-
- 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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
-
- 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
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/00307—Component temperature regulation using a liquid flow
-
- 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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00928—Control 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 a secondary circuit
-
- 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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00949—Control 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Provided is an air conditioner for a vehicle, which does not need a special heater for heating air supplied to a vehicle interior and can add insufficient heat during heating. In the heat medium circuit (30), the heat medium heat exchanger (23) and the heat medium radiator (16) are connected in parallel with each other, and in the heat medium circuit (30), a flow path through which the heat medium having absorbed heat released from the electric motor (M) flows is switched to the heat medium heat exchanger (23) side or the heat medium radiator (15) side. Thus, the insufficient heat generated during heating in the vehicle interior can be compensated by the heat released from the motor (M), so that a dedicated heater for heating the air supplied to the vehicle interior is not required, and the manufacturing cost can be reduced.
Description
Technical Field
The present invention relates to an air conditioner for a vehicle applied to a vehicle including an electric motor for traveling, such as an electric vehicle or a hybrid vehicle.
Background
Conventionally, such a vehicle air conditioning apparatus includes a refrigerant circuit having a compressor, an indoor heat exchanger, an outdoor heat exchanger, and an expansion valve, and cools, heats, dehumidifies, and the like a vehicle interior by supplying air, which has exchanged heat with a refrigerant in the indoor heat exchanger, into the vehicle interior (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2018-63055
Disclosure of Invention
Technical problem to be solved by the invention
In the above vehicle air conditioner, when heating of the vehicle interior is performed in an environment where the temperature outside the vehicle is low, such as in winter, the amount of heat released from the refrigerant in the indoor heat exchanger may be insufficient, and the heating capacity may be insufficient. Therefore, in the vehicle air conditioner, the electric heater is provided in the air flow path through which the air supplied into the vehicle interior flows, and the vehicle interior is heated to the target temperature by supplementing insufficient heat with the electric heater.
The invention aims to provide an air conditioner for a vehicle, which does not need a special heater for heating air supplied to a vehicle chamber and can add insufficient heat during heating.
Technical scheme for solving technical problem
In order to achieve the above object, a vehicle air conditioner according to the present invention is a vehicle air conditioner including a refrigerant circuit having a compressor, an indoor heat exchanger in which air supplied into a vehicle interior is heat-exchanged with a refrigerant, an outdoor heat exchanger, and an expansion valve, wherein the vehicle air conditioner includes: a heat medium circuit to which an electric motor provided in a vehicle is connected and through which a heat medium that absorbs heat released from the electric motor flows; a heat medium heat exchanger that exchanges heat between the refrigerant flowing through the refrigerant circuit and the heat medium flowing through the heat medium circuit, thereby releasing heat from the heat medium and absorbing heat from the refrigerant; and a heat medium radiator configured to heat a heat medium by exchanging heat between the heat medium flowing through the heat medium circuit and air supplied into the vehicle interior, and to heat the air, wherein the heat medium heat exchanger and the heat medium radiator are connected in parallel to each other in the heat medium circuit, and the heat medium circuit includes a flow path switching unit configured to switch a flow path through which the heat medium absorbing heat released from the electric motor flows to the heat medium heat exchanger side or the heat medium radiator side.
Accordingly, the heat released from the electric motor is released to the refrigerant flowing through the refrigerant circuit or to the air supplied into the vehicle interior, and therefore, the insufficient heat during heating in the vehicle interior is compensated for by the heat released from the electric motor.
Effects of the invention
According to the air conditioning device for a vehicle of the present invention, since the insufficient heat generated during heating in the vehicle interior can be compensated by the heat released from the electric motor, a dedicated heater for heating the air supplied to the vehicle interior is not required, and the manufacturing cost can be reduced.
Drawings
Fig. 1 is a schematic configuration diagram showing a vehicle air conditioner according to an embodiment of the present invention.
Fig. 2 is a schematic configuration diagram showing a vehicle air conditioner in exhaust heat absorption operation.
Fig. 3 is a schematic configuration diagram showing a vehicle air conditioner in exhaust heat absorption + battery heating operation.
Fig. 4 is a schematic configuration diagram showing a vehicle air conditioner in which exhaust heat is discharged and a battery cooling operation is performed.
Fig. 5 is a schematic configuration diagram showing a vehicle air conditioner in exhaust heat heating operation.
Detailed Description
Fig. 1 to 5 show an embodiment of the present invention.
The air conditioner 1 for a vehicle according to the present invention is applied to a vehicle that can travel by the driving force of an electric motor, such as an electric vehicle or a hybrid vehicle.
A vehicle is provided with: an electric motor M for running; and a battery B for traveling as a constituent device for supplying electric power to the electric motor M. The electric motor M and the battery B release heat by use. Battery B is required to be used in a predetermined temperature range to exhibit predetermined performance. Therefore, the battery B may need to be cooled or heated depending on the temperature of the outside air or the usage state. Battery B is preferably used in the range of, for example, 10 ℃ to 30 ℃.
As shown in fig. 1, the air conditioner 1 for a vehicle includes: an air conditioning unit 10 provided in a vehicle cabin of a vehicle; a refrigerant circuit 20 provided across and outside the vehicle interior; and a heat medium circuit 30 through which a heat medium that absorbs heat released from electric motor M and battery B flows.
The air conditioning unit 10 has an air circulation path 11 for circulating air supplied into the vehicle interior. An outside air inlet 11a and an inside air inlet 11b are provided at one end of the air flow path 11, the outside air inlet 11a allowing air outside the vehicle compartment to flow into the air flow path 11, and the inside air inlet 11b allowing air inside the vehicle compartment to flow into the air flow path 11. Further, at the other end of the air flow path 11, a not-shown foot outlet that blows out the air flowing through the air flow path 11 toward the feet of the passenger, a not-shown natural air outlet that blows out the air flowing through the air flow path 11 toward the upper body of the passenger, and a not-shown defogging outlet that blows out the air flowing through the air flow path 11 toward the surface on the vehicle interior side of the front windshield of the vehicle are provided.
A suction port switching damper 13 is provided at one end of the air flow path 11, and the suction port switching damper 13 can open one of the outside air suction port 11a and the inside air suction port 11b and close the other. The suction port switching damper 13 can switch an external air supply mode in which the internal air suction port 11b is closed and the external air suction port 11a is opened, an internal air circulation mode in which the external air suction port 11a is closed and the internal air suction port 11b is opened, and an internal external air suction mode in which the external air suction port 11a and the internal air suction port 11b are opened by being positioned between the external air suction port 11a and the internal air suction port 11b, respectively.
An indoor air blower 12 such as a sirocco fan for circulating air from one end side to the other end side of the air flow path 11 is provided at one end side in the air flow path 11.
A heat absorber 14 as an indoor heat exchanger is provided on the downstream side of the air flow direction of the indoor fan 12 in the air flow path 11, and the heat absorber 14 cools and dehumidifies the air flowing through the air flow path 11. Further, a radiator 15 as an indoor heat exchanger is provided on the downstream side of the heat absorber 14 in the air flow direction in the air flow path 11, and the radiator 15 heats the air flowing through the air flow path 11.
The radiator 15 is disposed on one side in the direction orthogonal to the air flow path 11, and a radiator bypass flow path 11c that bypasses the radiator 15 is formed on the other side in the direction orthogonal to the air flow path 11. A heat medium radiator 16 is provided between the heat absorber 14 and the radiator 15 on one side in the direction orthogonal to the air flow path 11, and the heat medium radiator 16 heats the air supplied into the vehicle interior by exchanging heat between the heat medium and the air flowing through the heat medium circuit 30.
An air mixing damper 17 is provided between the heat absorber 14 and the heat medium radiator 16 in the air flow path 11, and the air mixing damper 17 adjusts the ratio of air heated by the radiator 15 and the heat medium radiator 16 in the air flowing through the heat absorber 14. The air mixing damper 17 closes one of the radiator bypass flow path 11c and the heat medium radiator 16 to the upstream side in the air flow direction of the heat medium radiator 16 and the radiator bypass flow path 11c and opens the other, or opens both the radiator bypass flow path 11c and the heat medium radiator 16, and adjusts the opening degree of the heat medium radiator 16 to the upstream side in the air flow direction. The air mix damper 17 has an opening degree of 0% in a state where the radiator bypass flow path 11c is opened while closing the upstream side in the air flow direction of the heat medium radiator 16 in the air flow path 11, and has an opening degree of 100% in a state where the radiator bypass flow path 11c is closed while opening the upstream side in the air flow direction of the heat medium radiator 16 in the air flow path 11.
The refrigerant circuit 20 includes: the heat sink 14; the heat spreader 15; a compressor 21 for compressing a refrigerant; an outdoor heat exchanger 22 for heat-exchanging refrigerant with air outside the vehicle interior; a heat medium heat exchanger 23 for exchanging heat between the refrigerant flowing through the refrigerant circuit 20 and the heat medium flowing through the heat medium circuit 30; a first expansion valve 24a, a second expansion valve 24b, and a third expansion valve 24c capable of adjusting valve opening degrees between full-closing and full-opening; a first solenoid valve 25a and a second solenoid valve 25b for opening and closing a flow path of the refrigerant; a first check valve 26a and a second check valve 26b for regulating the flow direction of the refrigerant in the refrigerant flow path; and an accumulator 27 for separating the gaseous refrigerant from the liquid refrigerant and preventing the liquid refrigerant from being sucked into the compressor 21, which are connected by, for example, aluminum pipes or copper pipes. As the refrigerant flowing through the refrigerant circuit 20, for example, R-134a or the like is used.
Specifically, the refrigerant inflow side of the radiator 15 is connected to the refrigerant discharge side of the compressor 21, thereby forming the refrigerant flow path 20 a. The refrigerant flow path 20b is formed by connecting the refrigerant inflow side of the outdoor heat exchanger 22 to the refrigerant outflow side of the radiator 15. The refrigerant circulation path 20b is provided with a first expansion valve 24 a. The refrigerant flow path 20c is formed by connecting the refrigerant inflow side of the heat absorber 14 to the refrigerant outflow side of the outdoor heat exchanger 22. The refrigerant flow path 20c is provided with a first check valve 26a and a second expansion valve 24b in this order from the outdoor heat exchanger 22 side. The refrigerant flow path 20d is formed by connecting the refrigerant suction side of the compressor 21 to the refrigerant outflow side of the heat absorber 14. In refrigerant flow path 20d, second check valve 26b and accumulator 27 are provided in this order from heat absorber 14 side. The refrigerant flow path 20e is formed by connecting the first check valve 26a and the second expansion valve 24b of the refrigerant flow path 20c to the radiator 15 and the first expansion valve 24a of the refrigerant flow path 20b so as to bypass the outdoor heat exchanger 22. The refrigerant circulation path 20e is provided with a first solenoid valve 25 a. Refrigerant flow path 20f is formed by connecting the space between heat absorber 14 and second check valve 26b in refrigerant flow path 20d to the space between outdoor heat exchanger 22 and first check valve 25a in refrigerant flow path 20 c. The second solenoid valve 25b is provided in the refrigerant circulation path 20 f. The refrigerant inflow side of the heat medium heat exchanger 23 is connected between the first check valve 26a and the second expansion valve 24b in the refrigerant flow path 23c, thereby forming the refrigerant flow path 20 g. The third expansion valve 24c is provided in the refrigerant circulation path 20 g. The refrigerant flow path 20h is formed by connecting the second check valve 26b and the accumulator 27 in the refrigerant flow path 20d to the refrigerant outflow side of the heat medium heat exchanger 23.
The outdoor heat exchanger 22 is a heat exchanger including fins and tubes, and is disposed outside the vehicle compartment such as an engine compartment so that the air flowing direction of the heat exchange with the refrigerant is oriented in the front-rear direction of the vehicle. An outdoor fan 22a is provided in the vicinity of the outdoor heat exchanger 22, and the outdoor fan 22a circulates air outside the vehicle in the front-rear direction when the vehicle is stopped.
As shown in fig. 1, the heat medium circuit 30 includes: the heat medium radiator 16; the heat medium heat exchanger 23; a first heat medium pump 31a and a second heat medium pump 31b for feeding the heat medium under pressure; a radiator 32 for exchanging heat between the heat medium flowing through the heat medium circuit 30 and air outside the vehicle interior; a first heat medium three-way valve 33a, a second heat medium three-way valve 33b, a third heat medium three-way valve 33c, and a fourth heat medium three-way valve 33d as flow path switching units; a battery B for running the vehicle; and an electric motor M for running the vehicle, which are connected by, for example, an aluminum pipe or a copper pipe. As the heat medium flowing through the heat medium circuit 30, for example, an antifreeze such as ethylene glycol can be used.
Specifically, the heat medium flow path 30a is formed by connecting the heat medium inflow side of the electric motor M to the heat medium discharge side of the first heat medium pump 31 a. The heat medium flow path 30b is formed by connecting the heat medium inlet of the first heat medium three-way valve 33a to the heat medium outlet of the electric motor M. The heat medium flow path 30c is formed by connecting the heat medium inlet of the second heat medium three-way valve 33b to one of the two heat medium outlet of the first heat medium three-way valve 33 a. The heat medium flow path 30d is formed by connecting the heat medium inflow side of the heat medium heat exchanger 23 to one of the two heat medium outflow ports of the second heat medium three-way valve 33 b. The heat medium flow path 30e is formed by connecting the heat medium inlet of the third heat medium three-way valve 33c to the heat medium outlet of the heat medium heat exchanger 23. The heat medium suction side of the first heat medium pump 31a is connected to one of the two heat medium outflow ports of the third heat medium three-way valve 33c, thereby forming the heat medium flow path 30 f. The heat medium flow inlet of the fourth heat medium pump 33d is connected to the other heat medium flow outlet of the first heat medium three-way valve 33a, thereby forming the heat medium flow path 30 g. The heat medium flow path 30h is formed by connecting the heat medium inflow side of the heat medium radiator 16 to one of the two heat medium outflow ports of the fourth heat medium three-way valve 33 d. The heat medium flow path 30i is formed by connecting the heat medium flow path 30f to the heat medium outflow side of the heat medium radiator 16. Further, the heat medium flow-in side of the battery B is connected to the other heat medium flow-out port of the second heat medium three-way valve 33B to form the heat medium flow path 30 j. The heat medium flow path 30k is formed by connecting the heat medium flow path 30d to the heat medium outflow side of the battery B. The heat medium suction side of the second heat medium pump 31b is connected to the other heat medium outlet of the third heat medium three-way valve 33c, thereby forming the heat medium flow path 30 l. The heat medium flow path 30c is connected to the heat medium discharge side of the second heat medium pump 31b, so that the heat medium flow path 30m is formed. Further, the heat medium flow path 30n is formed by connecting the heat medium inflow side of the radiator 32 to the other heat medium flow outlet of the fourth heat medium three-way valve 33 d. The heat medium flow path 30i is connected to the heat medium outflow side of the radiator 32 to form a heat medium flow path 30 o. The first heat medium three-way valve 33a switches the destination communicated with the heat medium flow path 30b to the heat medium flow path 30c side or the heat medium flow path 30g side. The second heat medium three-way valve 33b switches the destination communicated with the heat medium flow path 30c to the heat medium flow path 30d side or the heat medium flow path 30j side. The third heat medium three-way valve 33c switches the destination communicated with the heat medium flow path 30e to the heat medium flow path 30f side or the heat medium flow path 30l side. The fourth heat medium three-way valve 33d switches the destination communicated with the heat medium flow path 30g to the heat medium flow path 30h side or the heat medium flow path 30n side.
The radiator 32 is a heat exchanger composed of fins and tubes, and is provided at a position adjacent to the outdoor heat exchanger 22 in the air flow direction.
The amount of heat generated by the electric motor M varies depending on the magnitude of the load acting thereon. The electric motor M can change the magnitude of the load to be applied, and can adjust the amount of heat generated by driving.
In the vehicle air conditioning apparatus 1 configured as described above, the temperature and humidity of the air in the vehicle interior are adjusted using the air conditioning unit 10 and the refrigerant circuit 20.
For example, when the air-conditioning unit 10 is performing the cooling operation, the indoor fan 12 is driven and the air mix damper 17 is set to an opening degree of 0%. In the refrigerant circuit 20, the compressor 21 is driven in a state where the first expansion valve 24a is fully opened, the second expansion valve 24b is set to a predetermined valve opening degree, the first solenoid valve 25a is closed, and the second solenoid valve 25b is closed.
Thus, the refrigerant discharged from the compressor 21 flows through the radiator 15, the outdoor heat exchanger 22, the second expansion valve 24b, and the heat absorber 14 in this order as indicated by solid arrows in the refrigerant circuit 20 of fig. 1, and is then sucked into the compressor 21.
The refrigerant flowing through the refrigerant circuit 20 does not radiate heat in the radiator 15 because the opening degree of the air mixing damper 17 is 0%, but radiates heat in the outdoor heat exchanger 22 and absorbs heat in the heat absorber 14.
The air flowing through the air flow path 11 is cooled by heat exchange with the refrigerant that has absorbed heat in the heat absorber 14, and is blown out into the vehicle interior.
In addition, for example, in the dehumidification-air cooling operation in which the temperature and humidity in the vehicle interior are reduced, the opening degree of the air mixing flap 17 of the air conditioning unit 10 is set to an opening degree greater than 0% in the refrigerant flow path of the refrigerant circuit 20 during the cooling operation.
Thereby, the refrigerant flowing through the refrigerant circuit 20 releases heat in the radiator 15 and the outdoor heat exchanger 22, and absorbs heat in the heat absorber 14.
The air flowing through the air flow path 11 is dehumidified and cooled by heat exchange with the refrigerant that has absorbed heat in the heat absorber 15, heated to a target blowing temperature in the radiator 15, and then blown out into the vehicle interior.
In the air conditioning unit 10, for example, during a heating operation for raising the temperature in the vehicle interior, the indoor fan 12 is driven and the opening degree of the air mix damper 17 is set to an opening degree greater than 0%. In the refrigerant circuit 20, the compressor 21 is driven in a state in which the first expansion valve 24a is opened to a predetermined valve opening degree smaller than the full opening, the second expansion valve 24b is fully closed, the first electromagnetic valve 25a is closed, and the second electromagnetic valve 25b is opened.
Thus, the refrigerant discharged from the compressor 21 flows through the radiator 15, the first expansion valve 24a, and the outdoor heat exchanger 22 in this order as indicated by the broken-line arrows in fig. 1, and is sucked into the compressor 21.
The refrigerant flowing through the refrigerant circuit 20 releases heat in the radiator 15 and absorbs heat in the outdoor heat exchanger 22.
The air flowing through the air flow path 11 of the air conditioning unit 10 is heated by heat exchange with the refrigerant that has dissipated heat in the radiator 15 without being subjected to heat exchange with the refrigerant in the heat absorber 14, and is blown out into the vehicle interior.
In the vehicle air conditioner 1, for example, when the air outside the vehicle is at a low temperature during the heating operation, the amount of heat absorbed by the outdoor heat exchanger 22 may be insufficient, and the heating capacity may be insufficient. Therefore, in the air conditioning apparatus 1 for a vehicle, in a state where the temperature and humidity in the vehicle interior are adjusted using the air conditioning unit 10 and the refrigerant circuit 20, an exhaust heat absorption operation for absorbing heat released from the electric motor M in the refrigerant circuit 20 is performed.
In the exhaust heat absorption operation, the first solenoid valve 25a is opened and the third expansion valve 24c is set to a predetermined valve opening degree in the refrigerant circuit 20. In the exhaust heat absorbing operation, in the heat medium circuit 30, the flow path of the first heat medium three-way valve 33a is made to communicate with the heat medium flow path 30c side, the flow path of the second heat medium three-way valve 33b is made to communicate with the heat medium flow path 30d side, the flow path of the third heat medium three-way valve 33c is made to communicate with the heat medium flow path 30f, and the first heat medium pump 31a is driven in a state where the second heat medium pump 31b is stopped. At this time, the electric motor M is driven to generate the required heat.
As a result, in the refrigerant circuit 20, a part of the refrigerant flowing out of the radiator 15 flows through the third expansion valve 24c as shown in fig. 2, is decompressed, exchanges heat with the heat medium flowing through the heat medium circuit 30 in the heat medium heat exchanger 23, absorbs heat, flows through the accumulator 27, and is sucked into the compressor 21.
In the heat medium circuit 30, the heat medium discharged from the first heat medium pump 31a flows through the electric motor M and the heat medium heat exchanger 23 in this order as shown in fig. 2, and is sucked into the first heat medium pump 31 a. The heat medium discharged from the first heat medium pump 31a and flowing through the heat medium circuit 30 is heated by the heat released from the electric motor M, and exchanges heat with the refrigerant in the heat medium heat exchanger 23 to release heat.
The electric motor M is cooled by the heat medium having exchanged heat with the refrigerant via the heat medium heat exchanger 23.
In the vehicle air conditioner 1, for example, during the heating operation, the refrigerant circuit 20 absorbs heat released from the electric motor M and performs exhaust heat absorption for heating the battery B and the battery heating operation at the same time.
In the exhaust heat absorption + battery heating operation, the first solenoid valve 25a is opened and the third expansion valve 24c is set to a predetermined valve opening degree in the refrigerant circuit 20 that performs the heating operation. In the exhaust heat absorption + battery heating operation, in the heat medium circuit 30, the flow path of the first heat medium three-way valve 33a is made to communicate with the heat medium flow path 30c side, the flow path of the second heat medium three-way valve 33b is made to communicate with the heat medium flow path 30j side, the flow path of the third heat medium three-way valve 33c is made to communicate with the heat medium flow path 30f, and the first heat medium pump 31a is driven in a state where the second heat medium pump 31b is stopped. At this time, the electric motor M is driven to generate the required heat.
As a result, in the refrigerant circuit 20, a part of the refrigerant flowing out of the radiator 15 flows through the third expansion valve 24c as shown in fig. 3, is decompressed, exchanges heat with the heat medium flowing through the heat medium circuit 30 in the heat medium heat exchanger 23, absorbs heat, flows through the accumulator 27, and is sucked into the compressor 21.
In the heat medium circuit 30, the heat medium discharged from the first heat medium pump 31a flows through the electric motor M, the battery B, and the heat medium heat exchanger 23 in this order as shown in fig. 3, and is sucked into the first heat medium pump 31 a. The heat medium discharged from the first heat medium pump 31a and flowing through the heat medium circuit 30 is heated by the heat released from the electric motor M, heats the battery B to release heat, and exchanges heat with the refrigerant in the heat medium heat exchanger 23 to release heat.
The electric motor M is cooled by the heat medium having exchanged heat with the refrigerant via the heat medium heat exchanger 23.
In the vehicle air conditioner 1, for example, during the cooling operation, the heat released from the electric motor M is discharged to the outside of the vehicle compartment, and the exhaust heat discharge + battery cooling operation for cooling the battery B is performed.
In the exhaust heat discharge + battery cooling operation, the third expansion valve 24c is set to a predetermined valve opening degree in the refrigerant circuit 20 that performs the cooling operation. In the exhaust heat removal + battery cooling operation, in the heat medium circuit 30, the flow path of the first heat medium three-way valve 33a is communicated with the heat medium flow path 30g side, the flow path of the second heat medium three-way valve 33b is communicated with the heat medium flow path 30j side, the flow path of the third heat medium three-way valve 33c is communicated with the heat medium flow path 30l, the flow path of the fourth heat medium three-way valve 33d is communicated with the heat medium flow path 30n, and the first heat medium pump 31a and the second heat medium pump 31b are driven.
As a result, in the refrigerant circuit 20, a part of the refrigerant flowing out of the radiator 15 flows through the third expansion valve 24c as shown in fig. 4, is decompressed, exchanges heat with the heat medium flowing through the heat medium circuit 30 in the heat medium heat exchanger 23, absorbs heat, flows through the accumulator 27, and is sucked into the compressor 21.
In the heat medium circuit 30, the heat medium discharged from the first heat medium pump 31a flows through the electric motor M and the radiator 32 in this order as shown in fig. 4, and is sucked into the first heat medium pump 31 a. The heat medium discharged from the first heat medium pump 31a and flowing through the heat medium circuit 30 is heated by the heat released from the electric motor M, and exchanges heat with the air outside the vehicle interior in the radiator 32 to release heat.
In the heat medium circuit 30, the heat medium discharged from the second heat medium pump 31B flows through the battery B and the heat medium heat exchanger 23 in this order as shown in fig. 4, and is sucked into the second heat medium pump 31B. The heat medium discharged from the second heat medium pump 31B and flowing through the heat medium circuit 30 absorbs heat by cooling the battery B, and releases heat by exchanging heat with the refrigerant in the heat medium heat exchanger 23.
The electric motor M is cooled by the heat medium that exchanges heat with the air outside the vehicle compartment via the radiator 32.
The battery B is cooled by the heat medium that has released heat in the heat medium heat exchanger 23.
In addition, in the air conditioning apparatus 1 for a vehicle, for example, when the heating capacity is insufficient or when the driving of the compressor is stopped due to a failure or the like, the exhaust heat heating operation for heating the air supplied into the vehicle interior by the heat released from the electric motor M is performed.
In the exhaust heat heating operation, the indoor blower 12 is driven in the air conditioning unit 10, and the air mixing damper 17 is set to an opening degree greater than 0%. In the refrigerant circuit 20, the heating operation may be performed, or the compressor 21 may be stopped. In the heat medium circuit 30, the flow path of the first heat medium three-way valve 33a is made to communicate with the heat medium flow path 30g side, the flow path of the fourth heat medium three-way valve 33d is made to communicate with the heat medium flow path 30h side, and the first heat medium pump 31a is driven in a state where the second heat medium pump 31b is stopped. At this time, the electric motor M is driven to generate the required heat.
Thus, in the heat medium circuit 30, the heat medium discharged from the first heat medium pump 31a flows through the electric motor M and the heat medium radiator 16 in this order as shown in fig. 5, and is sucked into the first heat medium pump 31 a. The heat medium discharged from the first heat medium pump 31a and flowing through the heat medium circuit 30 is heated by the heat released from the electric motor M, and exchanges heat with the air flowing through the air flow path 11 in the heat medium radiator 16 to radiate heat.
In the air conditioning unit 10, the air flowing through the air flow path 11 is heated by heat exchange with the heat medium in the heat medium heat exchanger 16, and is supplied into the vehicle interior.
The electric motor M is cooled by the heat medium that exchanges heat with the air supplied into the vehicle interior through the heat medium heat exchanger 16.
As described above, according to the vehicle air conditioner of the present embodiment, the heat medium heat exchanger 23 and the heat medium radiator 16 are connected in parallel to each other in the heat medium circuit 30, and the flow path through which the heat medium absorbing the heat released from the electric motor M flows is switched between the heat medium heat exchanger 23 side and the heat medium radiator 16 side in the heat medium circuit 30.
Accordingly, the heat that is insufficient for heating the vehicle interior can be compensated for by the heat released from the electric motor M, and therefore, a dedicated heater for heating the air supplied to the vehicle interior is not required, and the manufacturing cost can be reduced.
A radiator 32 for discharging heat from the heat medium to the air outside the vehicle compartment is connected to the heat medium circuit 30.
Accordingly, when the heat released from the electric motor M is not necessary, the heat released from the electric motor M can be discharged from the radiator 32 to the air outside the vehicle interior, and thus, occurrence of a problem due to the heat of the electric motor M can be prevented.
Further, a battery B for supplying electric power to the electric motor M is connected to the heat medium circuit 30.
This allows the refrigerant circuit 20 to absorb heat released from the battery B or to heat the battery B by heat released from the electric motor M, and allows the temperature of a plurality of devices to be adjusted by one heat medium circuit 30.
In the heat medium circuit 30, a flow path of the heat medium for discharging the heat released from the electric motor M from the radiator 32 to the outside of the vehicle compartment can be set, and a flow path of the heat medium for discharging the heat released from the battery to the refrigerant flowing through the refrigerant circuit 30 in the heat medium heat exchanger 23 can be set.
This allows the electric motor M and the battery B to simultaneously radiate heat and be cooled, and thus prevents the occurrence of a problem caused by the heat of the electric motor M and the battery B in an environment where the outside air is at a high temperature, such as in summer.
Further, the electric motor M can adjust the amount of heat generation.
Thus, by adjusting the amount of heat generated by the electric motor M in accordance with the amount of heat insufficient for heating in the vehicle interior or the amount of suction required in the refrigerant circuit 20, the temperature in the vehicle interior can be reliably adjusted to the set temperature.
In addition, in the above-described embodiment, the battery B is connected to the heat medium circuit 30 as a device requiring temperature adjustment, but the present invention is not limited thereto. As a component of a vehicle requiring temperature adjustment, for example, a power supply device such as a converter, an electronic component, or the like may be connected to the heat medium circuit 30.
In the above embodiment, the antifreeze is used as the heat medium flowing through the heat medium circuit 30, but the present invention is not limited to this. As long as heat exchange with air can be performed in the heat medium heat exchanger 23, water, oil, or the like can be used as the heat medium, for example.
In the above embodiment, the heat medium radiator 16 is disposed on the upstream side in the air flow direction of the radiator 15 in the air flow path 11, but the present invention is not limited to this. The heat medium radiator 16 may be disposed on the downstream side of the radiator 15 in the air flow direction as long as the air flowing through the air flow path 11 can be heated.
In the above embodiment, the case where the heat absorption of the refrigerant in the heat medium heat exchanger 23 is not performed during the exhaust heat heating operation is described, but the present invention is not limited to this. In the exhaust heat heating operation, the second heat medium pump 31B may be driven to allow the heat medium heat exchanger 23 to absorb heat released from the battery B.
(symbol description)
1 an air conditioning device for a vehicle;
16 heat medium radiator;
20a refrigerant circuit;
21 a compressor;
22 an outdoor heat exchanger;
23 heat medium heat exchanger;
24a first expansion valve;
24b a second expansion valve;
30a heat medium circuit;
a 32 heat sink;
33a first heat medium three-way valve;
33b a second heat medium three-way valve;
33c a third heat medium three-way valve;
33d a fourth heat medium three-way valve;
b, a battery;
m electric motor.
Claims (5)
1. An air conditioning device for a vehicle includes a refrigerant circuit having a compressor, an indoor heat exchanger in which air supplied into a vehicle interior is heat-exchanged with a refrigerant, an outdoor heat exchanger, and an expansion valve,
it is characterized in that the preparation method is characterized in that,
the air conditioning device for a vehicle includes:
a heat medium circuit to which an electric motor provided in a vehicle is connected and through which a heat medium that absorbs heat released from the electric motor flows;
a heat medium heat exchanger that exchanges heat between the refrigerant flowing through the refrigerant circuit and the heat medium flowing through the heat medium circuit, thereby releasing heat from the heat medium and absorbing heat from the refrigerant; and
a heat medium radiator that radiates heat from the heat medium by exchanging heat between the heat medium flowing through the heat medium circuit and air supplied into the vehicle interior to heat the air,
in the heat medium circuit, a heat medium heat exchanger and a heat medium radiator are connected in parallel with each other,
the heat medium circuit includes a flow path switching unit that switches a flow path through which the heat medium absorbing heat released from the electric motor flows to a heat medium heat exchanger side or a heat medium radiator side.
2. The air conditioning device for vehicles according to claim 1,
a radiator for discharging heat from the heat medium to the air outside the vehicle compartment is connected to the heat medium circuit.
3. A vehicular air-conditioning apparatus according to claim 2,
a battery for supplying electric power to the electric motor is connected to the heat medium circuit.
4. A vehicular air-conditioning apparatus according to claim 3,
in the heat medium circuit, a flow path of the heat medium for discharging the heat released from the electric motor from the radiator to the outside of the vehicle compartment can be set, and a flow path of the heat medium for discharging the heat released from the battery to the refrigerant flowing through the refrigerant circuit in the heat medium heat exchanger can be set.
5. The air conditioning device for vehicle as claimed in any one of claims 1 to 4,
the electric motor can adjust the amount of heat generation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019014285A JP7349246B2 (en) | 2019-01-30 | 2019-01-30 | Vehicle air conditioner |
| JP2019-014285 | 2019-01-30 | ||
| PCT/JP2019/048672 WO2020158207A1 (en) | 2019-01-30 | 2019-12-12 | Vehicle air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113316522A true CN113316522A (en) | 2021-08-27 |
Family
ID=71840586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980088852.1A Pending CN113316522A (en) | 2019-01-30 | 2019-12-12 | Air conditioner for vehicle |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7349246B2 (en) |
| CN (1) | CN113316522A (en) |
| DE (1) | DE112019006766T5 (en) |
| WO (1) | WO2020158207A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022222102A1 (en) * | 2021-04-22 | 2022-10-27 | 浙江智马达智能科技有限公司 | Thermal management system, heating method and device, vehicle, and storage medium |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022107429A1 (en) * | 2020-11-20 | 2022-05-27 | 日本電産株式会社 | Temperature regulator |
| CN113147323B (en) * | 2021-05-11 | 2022-05-13 | 岚图汽车科技有限公司 | Pure electric vehicle thermal management system and method |
| JP2023107645A (en) * | 2022-01-24 | 2023-08-03 | サンデン株式会社 | Air conditioner for vehicle |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE112019006766T5 (en) | 2021-10-07 |
| JP2020121633A (en) | 2020-08-13 |
| WO2020158207A1 (en) | 2020-08-06 |
| JP7349246B2 (en) | 2023-09-22 |
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