JP7231348B2 - Vehicle air conditioner - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner that is applied to a vehicle, such as an electric vehicle or a hybrid vehicle, having a battery that supplies electric power to an electric motor for running.

Conventionally, this type of vehicle air conditioner includes a refrigerant circuit having a compressor, an indoor heat exchanger, an outdoor heat exchanger, and an expansion valve, and supplies air into the passenger compartment after heat exchange with the refrigerant in the indoor heat exchanger. Air-conditioning, heating, dehumidification, etc., are performed in the passenger compartment.

Vehicles equipped with the vehicle air conditioner include electric vehicles, hybrid vehicles, and the like, which are equipped with a running battery for supplying electric power to an electric motor as a drive source. When the vehicle continues to run or is rapidly charged, the running battery may release heat and reach a high temperature.

For this reason, in order to cool the driving battery in the vehicle, it is known that the driving battery is connected to a cooling water circuit, and the cooling water circuit is connected to the refrigerant circuit via a water-refrigerant heat exchanger. (See, for example, Patent Document 1). In the vehicle, the driving battery is cooled by the cooling water flowing through the cooling water circuit, and the cooling water that has absorbed heat by cooling the driving battery is heat-exchanged with the refrigerant flowing through the refrigerant circuit, thereby dissipating heat. Battery cooling operation is in progress.

JP 2018-43741 A

In the vehicle air conditioner, for example, the outdoor heat exchanger functions as a heat absorber while heating the vehicle interior. Therefore, in the vehicle air conditioner, when the vehicle interior is heated and the battery is cooled simultaneously, heat is absorbed by the outdoor heat exchanger and the water-refrigerant heat exchanger and released by the indoor heat exchanger. In this case, when the heating load in the passenger compartment is small and the battery cooling load is large, the amount of heat released in the refrigerant circuit becomes small, and the necessary amount of heat absorption is insufficient, so there is a possibility that the battery cannot be sufficiently cooled.

SUMMARY OF THE INVENTION An object of the present invention is to provide an air conditioner for a vehicle that can reliably cool the battery by ensuring the amount of heat released in the refrigerant circuit during the cooling operation of the battery.

In order to achieve the above object, a vehicle air conditioner of the present invention is a vehicle air conditioner having a battery cooling function for cooling a battery that supplies electric power to an electric motor for running a vehicle. an indoor heat exchanger for exchanging heat between the air supplied to the vehicle interior and the refrigerant; a battery cooling heat absorber for absorbing heat released from the battery; An outdoor heat exchanger that exchanges heat, air conditioning determination means for determining whether or not the temperature or humidity in the vehicle interior needs to be adjusted, and battery cooling determination means for determining whether or not cooling of the battery is required. When the air conditioning determination means determines that the temperature or humidity in the vehicle interior needs to be adjusted and the battery cooling determination means determines that the battery needs to be cooled, the outdoor heat exchanger is used as a radiator. and outdoor heat exchanger setting means for functioning.

As a result, since the refrigerant radiates heat in the outdoor heat exchanger, the refrigerant can reliably absorb heat in the indoor heat exchanger and the battery cooling heat absorber.

According to the present invention, the heat can be reliably absorbed by the refrigerant in the indoor heat exchanger and the battery cooling heat absorber functioning as heat absorbers. Insufficient cooling capacity can be suppressed.

1 is a schematic configuration diagram of a vehicle air conditioner showing an embodiment of the present invention; FIG. 3 is a block diagram showing a control system; FIG. 1 is a schematic configuration diagram of a vehicle air conditioner that performs only a battery cooling operation; FIG. 1 is a schematic configuration diagram of a vehicle air conditioner that simultaneously performs an air conditioning operation and a battery cooling operation; FIG. It is a flow chart which shows operation change control processing. It is a flow chart which shows operation change control processing.

1 to 6 show one embodiment of the invention.

A vehicle air conditioner 1 of the present invention is applied to a vehicle such as an electric vehicle or a hybrid vehicle that can run by driving force of an electric motor.

The vehicle has an electric motor for running, and a battery B for running that stores electric power to be supplied to the electric motor.

The battery B releases heat when supplying electric power to the electric motor or charging the electric motor while the vehicle is running. Battery B is capable of rapid charging, in which charging is performed in a short time by increasing one or both of the voltage and current of the supplied power, and the amount of heat released is particularly large during rapid charging. Battery B is desirably used in the range of, for example, 10° C. to 30° C., and deterioration will be accelerated at a high temperature of 50° C. or higher. Therefore, it is necessary to cool battery B as necessary to keep it below a predetermined temperature T1 (eg, 50° C.).

This vehicle air conditioner 1 has a battery cooling function for cooling the battery B. As shown in FIG. As shown in FIG. 1, the vehicle air conditioner 1 absorbs heat released from an air conditioning unit 10 provided in a vehicle interior, a refrigerant circuit 20 provided in and out of the vehicle interior, and a battery B. and a heat medium circuit 30 for circulating the heat medium.

The air conditioning unit 10 has an air circulation passage 11 for circulating the air supplied to the vehicle interior. At one end of the air flow passage 11, an outside air inlet 11a for letting air outside the vehicle flow into the air flow passage 11, an inside air inlet 11b for letting air inside the vehicle flow into the air flow passage 11, is provided. Further, at the other end of the air circulation passage 11, a foot outlet (not shown) for blowing the air circulating through the air circulation passage 11 toward the passenger's feet, and a vent (not shown) for blowing the air toward the passenger's upper body. An air outlet and a differential air outlet (not shown) for blowing air toward a surface of the windshield of the vehicle on the inner side of the cabin are provided.

An indoor blower 12 such as a sirocco fan is provided on one end side of the air circulation passage 11 for circulating air from one end side to the other end side of the air circulation passage 11 .

At one end of the air flow passage 11, an intake switching damper 13 is provided that can open one of the external air intake 11a and the internal air intake 11b and close the other. The intake port switching damper 13 has an external air supply mode in which the internal air intake port 11b is closed and the external air intake port 11a is opened, an internal air circulation mode in which the external air intake port 11a is closed and the internal air intake port 11b is opened, and an external air intake port. It is possible to switch between an internal/external air intake mode in which the external air intake port 11a and the internal air intake port 11b are opened by locating between the internal air intake port 11a and the internal air intake port 11b.

A heat absorber 14 as an indoor heat exchanger for cooling and dehumidifying the air flowing through the air circulation passage 11 is provided on the air circulation direction downstream side of the indoor blower 12 in the air circulation passage 11 . A radiator 15 as an indoor heat exchanger for heating the air flowing through the air circulation passage 11 is provided downstream of the heat absorber 14 in the air circulation passage 11 in the air circulation direction.

The radiator 15 is arranged on one side of the air flow path 11 in the orthogonal direction, and a radiator bypass flow path 11 c that bypasses the radiator 15 is formed on the other side of the air flow path 11 in the orthogonal direction. An air heater 16 for heating the air supplied to the vehicle interior is provided downstream of the radiator 15 in the air circulation passage 11 in the air circulation direction.

An air mix damper 17 is provided between the heat absorber 14 and the heat radiator 15 in the air flow passage 11 for adjusting the proportion of the air that has passed through the heat absorber 14 and is heated by the heat radiator 15. ing. The air mix damper 17 closes one of the radiator bypass flow passage 11c and the radiator 15 on the upstream side in the air flow direction of the radiator 15 and the radiator bypass flow passage 11c and opens the other. Alternatively, both the radiator bypass flow passage 11c and the radiator 15 are opened to adjust the opening degree of the radiator 15 on the upstream side in the air circulation direction. The air mix damper 17 has an opening degree of 0% when the upstream side of the radiator 15 in the air circulation passage 11 in the air circulation direction is closed and the radiator bypass passage 11c is opened. The opening is 100% when the upstream side in the air circulation direction is opened and the radiator bypass flow passage 11c is closed.

The refrigerant circuit 20 flows into the heat absorber 14, the radiator 15, the compressor 21 for compressing the refrigerant, the outdoor heat exchanger 22 for exchanging heat between the refrigerant and air outside the vehicle, and the heat absorber 14. An internal heat exchanger 23 for exchanging heat between the refrigerant and the refrigerant flowing out of the heat absorber 14, and heat absorption for battery cooling for exchanging heat between the refrigerant flowing through the refrigerant circuit 20 and the heat medium flowing through the heat medium circuit 30. A heat medium heat exchanger 24 as a vessel, an electronic first expansion valve 25a whose valve opening degree can be adjusted between fully closed and fully opened, a heat absorber 14, and refrigerant at the outlet of the heat medium heat exchanger 24 Mechanical second and third expansion valves 25b and 25c whose valve opening degrees are adjusted according to temperature changes, first to fifth solenoid valves 26a as channel opening/closing valves for opening and closing the coolant channel, 26b, 26c, 26d, and 26e, a check valve 27 for regulating the flow direction of the refrigerant in the refrigerant flow path, a gas refrigerant and a liquid refrigerant are separated, and the liquid refrigerant is sucked into the compressor 21. It has an accumulator 28 for preventing the accumulator 28, which is connected, for example, by an aluminum tube or a copper tube. As the refrigerant flowing through the refrigerant circuit 20, for example, R-134a or the like is used.

The outdoor heat exchanger 22 is arranged outside the vehicle such as the engine room so that the direction of flow of air that exchanges heat with the refrigerant is the longitudinal direction of the vehicle. An outdoor blower 22d is provided near the outdoor heat exchanger 22 for circulating the air outside the passenger compartment in the longitudinal direction when the vehicle is stopped. The outdoor heat exchanger 22 includes a body portion 22a for releasing or absorbing heat from the refrigerant, a receiver portion 22b for separating the gaseous refrigerant from the liquid refrigerant by introducing the heat-dissipated refrigerant, and the receiver portion 22b. and a supercooling section 22c for supercooling the liquid refrigerant flowing out of the cooling medium.

Specifically describing the configuration of the refrigerant circuit 20 , a refrigerant flow passage 20 a is formed by connecting the refrigerant inflow side of the radiator 15 to the refrigerant discharge side of the compressor 21 . A refrigerant flow passage 20 b is formed by connecting the refrigerant inflow side of the outdoor heat exchanger 22 to the refrigerant outflow side of the radiator 15 . A first expansion valve 25a is provided in the refrigerant flow passage 20b. A refrigerant flow passage 20c is formed by connecting the refrigerant inflow side of the receiver portion 22b to the refrigerant outflow side of the body portion 22a of the outdoor heat exchanger 22 . A first electromagnetic valve 26a is provided in the refrigerant flow passage 20c. The refrigerant inflow side of the subcooling section 22c is connected to the refrigerant outflow side of the receiver section 22b in the outdoor heat exchanger 22 . A refrigerant flow passage 20d is formed by connecting the high-pressure refrigerant inflow side of the internal heat exchanger 23 to the refrigerant outflow side of the subcooling portion 22c. A refrigerant flow passage 20 e is formed by connecting the refrigerant inflow side of the heat absorber 14 to the high pressure refrigerant outflow side of the internal heat exchanger 23 . A check valve 27, a second electromagnetic valve 26b, and a second expansion valve 25b are provided in order from the internal heat exchanger 23 side in the refrigerant flow passage 20e. A refrigerant flow passage 20 f is formed by connecting the low-pressure refrigerant inflow side of the internal heat exchanger 23 to the refrigerant outflow side of the heat absorber 14 . A refrigerant flow passage 20g is formed by connecting the refrigerant suction side of the compressor 21 to the low-pressure refrigerant outflow side of the internal heat exchanger 23 . An accumulator 28 is provided in the refrigerant flow passage 20g. The outdoor heat exchanger 22 is bypassed between the radiator 15 and the first expansion valve 25a in the refrigerant flow path 20b, and the check valve 27 and the second solenoid valve 26b in the refrigerant flow path 20e are interposed. A coolant flow path 20h is formed by connecting them. A third solenoid valve 26c is provided in the refrigerant flow passage 20h. Between the body portion 22a of the outdoor heat exchanger 22 and the first solenoid valve 26a in the refrigerant flow passage 20c, the internal heat exchanger 23 and the accumulator 28 in the refrigerant flow passage 20g are connected to each other to allow refrigerant flow. A path 20i is formed. A fourth solenoid valve 26d is provided in the refrigerant flow path 20i. A refrigerant flow path 20j is formed by connecting the refrigerant inflow side of the heat medium heat exchanger 24 between the check valve 27 and the second electromagnetic valve 26b in the refrigerant flow path 20e. A fifth electromagnetic valve 26e and a third expansion valve 25c are provided in order from the refrigerant flow path 20e side in the refrigerant flow path 20j. A refrigerant flow passage 20k is formed on the refrigerant outflow side of the heat medium heat exchanger 24 by connecting between the accumulator 28 in the refrigerant flow passage 20g and the refrigerant suction side of the compressor 21 .

The heat medium circuit 30 includes the heat medium heat exchanger 24, a heat medium pump 31 for pumping the heat medium, and a battery B, which are connected by aluminum pipes or copper pipes, for example. As the heat medium flowing through the heat medium circuit 30, for example, an antifreeze liquid such as ethylene glycol is used.

More specifically, a heat medium flow passage 30 a is formed by connecting the heat medium inflow side of the heat medium heat exchanger 24 to the heat medium discharge side of the heat medium pump 31 . A heat medium flow path 30 b is formed by connecting the heat medium inflow side of the battery B to the heat medium outflow side of the heat medium heat exchanger 24 . A heat medium flow path 30 c is formed by connecting the heat medium intake side of the heat medium pump 31 to the heat medium outlet side of the battery B. As shown in FIG.

The vehicle air conditioner 1 also includes a controller 40 for controlling the temperature and humidity in the passenger compartment to set temperatures and humidity and for controlling the cooling of the battery B to a predetermined temperature or less. there is

The controller 40 has a CPU, ROM, and RAM. When the controller 40 receives an input signal from a device connected to the input side, the CPU reads the program stored in the ROM based on the input signal, and stores the state detected by the input signal in the RAM. , and send an output signal to a device connected to the output side.

On the input side of the controller 40, as shown in FIG. 2, a compressor 21, an outside air temperature sensor 41 for detecting the temperature Tam outside the passenger compartment, an inside air temperature sensor 42 for detecting the temperature Tr inside the passenger compartment, and air An intake air temperature sensor 43 for detecting the temperature Ti of the air flowing into the flow passage 11, a cooling air temperature sensor 44 for detecting the temperature Te of the air after being cooled in the heat absorber 14, and the air heated in the radiator 15. A heated air temperature sensor 45 for detecting the temperature Tc of the air after heating, an inside air humidity sensor 46 for detecting the humidity Rh in the vehicle interior, and a temperature Thex of the refrigerant after heat exchange in the outdoor heat exchanger 22 is detected. A coolant temperature sensor 47 for detecting the amount of solar radiation Ts, for example, a photosensor type solar radiation sensor 48 for detecting the amount of radiation Ts, a speed sensor 49 for detecting the speed V of the vehicle, and a pressure Pd on the high pressure side of the refrigerant circuit 20 for detecting , a heat medium temperature sensor 51 for detecting the temperature of the heat medium that has flowed out of the heat medium heat exchanger 24 in the heat medium circuit 30, setting of the preset temperature Tset in the vehicle compartment by the passenger, and operation of the air conditioning A setting operation unit 52 for setting contents switching and a battery B are connected.

On the output side of the controller 40, as shown in FIG. A display unit 53 is connected as notification means such as a liquid crystal display for displaying information such as temperature and operating conditions.

In the vehicle air conditioner 1 configured as described above, the air conditioning unit 10 and the refrigerant circuit 20 are used to adjust the temperature and humidity of the air in the vehicle compartment. Specifically, the vehicle air conditioner 1 performs a cooling operation for lowering the temperature in the passenger compartment, a dehumidifying cooling operation for lowering the humidity and temperature in the passenger compartment, and a heating operation for increasing the temperature in the passenger compartment. and a dehumidifying/heating operation for decreasing the humidity in the passenger compartment and increasing the temperature.

For example, when performing cooling operation, in the air conditioning unit 10, the indoor fan 12 is driven and the air mix damper 17 is set to 0% opening. In the refrigerant circuit 20, the compressor 21 is operated with the first expansion valve 25a fully opened, the first and second solenoid valves 26a and 26b opened, and the third to fifth solenoid valves 26c, 26d and 26e closed. drive. Furthermore, in the heat medium circuit 30, the heat medium pump 31 is driven.

As a result, in the refrigerant circuit 20, the refrigerant discharged from the compressor 21 flows through the main body of the refrigerant flow path 20a, the radiator 15, the refrigerant flow path 20b, and the outdoor heat exchanger 22, as indicated by solid line arrows in FIG. Part 22a, refrigerant flow path 20c, receiver part 22b, supercooling part 22c, refrigerant flow path 20d, high pressure side of internal heat exchanger 23, refrigerant flow path 20e, heat absorber 14, refrigerant flow path 20f, internal heat exchanger 23 , the refrigerant flow passage 20g, and is sucked into the compressor 21. As shown in FIG.

In the heat medium circuit 30, the heat medium discharged from the heat medium pump 31 flows through the heat medium flow path 30a, the heat medium heat exchanger 24, the heat medium flow path 30b, and the heat medium flow path 30b, as indicated by the dashed arrows in FIG. The heat medium pump 31 sucks the heat through the battery B and the heat medium flow passage 30 c in this order.

The refrigerant flowing through the refrigerant circuit 20 radiates heat in the outdoor heat exchanger 22 and absorbs heat in the heat absorber 14 without radiating heat in the radiator 15 because the opening degree of the air mix damper 17 is 0%.

The air flowing through the air flow passage 11 is cooled to the target blowout temperature TAO by exchanging heat with the heat absorbing refrigerant in the heat absorber 14 and is blown out into the passenger compartment.

Further, the heat medium flowing through the heat medium circuit 30 is heated by receiving the heat released from the battery B in the battery B without exchanging heat with the refrigerant in the heat medium heat exchanger 24 .

Further, for example, in a dehumidifying cooling operation that lowers the temperature and humidity in the vehicle interior, the opening degree of the air mix damper 17 of the air conditioning unit 10 is set to be greater than 0% in the refrigerant flow path of the refrigerant circuit 20 during the cooling operation. degrees.

Thereby, the refrigerant flowing through the refrigerant circuit 20 radiates 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 passage 11 is dehumidified and cooled by exchanging heat with the heat-absorbing refrigerant in the heat absorber 14, heated to the target outlet temperature TAO in the radiator 15, and blown into the passenger compartment.

Further, for example, in a dehumidification heating operation that lowers the humidity in the passenger compartment and raises the temperature, the first expansion valve 25a is set to a predetermined valve opening degree that is smaller than the full opening in the refrigerant flow path of the refrigerant circuit 20 during the cooling operation. and Also, the opening degree of the air mix damper 17 of the air conditioning unit 10 is set to be larger than 0%.

Thereby, the refrigerant flowing through the refrigerant circuit 20 radiates heat in the radiator 15 and absorbs heat in the outdoor heat exchanger 22 and the heat absorber 14 .

The air flowing through the air flow passage 11 of the air conditioning unit 10 is dehumidified and cooled by exchanging heat with the heat-absorbing refrigerant in the heat absorber 14, heated to the target blowout temperature TAO in the radiator 15, and blown out.

The vehicle air conditioner 1 also performs a battery cooling operation in which the battery B is cooled using the refrigerant circuit 20 and the heat medium circuit 30 .

In the case of battery cooling independent operation in which only the battery B is cooled without adjusting the temperature and humidity in the vehicle interior, the indoor fan 12 is stopped in the air conditioning unit 10 and the air mix damper 17 is set to 0. Set to % open. In the refrigerant circuit 20, the compressor 21 is operated with the first expansion valve 25a fully opened, the first and fifth electromagnetic valves 26a and 26e open, and the second to fourth electromagnetic valves 26b, 26c and 26d closed. drive. Furthermore, in the heat medium circuit 30, the heat medium pump 31 is driven.

As a result, in the refrigerant circuit 20, the refrigerant discharged from the compressor 21 flows through the main body of the refrigerant flow path 20a, the radiator 15, the refrigerant flow path 20b, and the outdoor heat exchanger 22, as indicated by solid line arrows in FIG. portion 22a, refrigerant flow passage 20c, receiver portion 22b, supercooling portion 22c, refrigerant flow passage 20d, high-pressure side of internal heat exchanger 23, refrigerant flow passages 20e and 20j, heat medium heat exchanger 24, refrigerant flow passage 20k, 20 g is circulated in order and sucked into the compressor 21 .

In the heat medium circuit 30, the heat medium discharged from the heat medium pump 31 flows through the heat medium flow path 30a, the heat medium heat exchanger 24, the heat medium flow path 30b, and the heat medium flow path 30b, as indicated by the dashed arrows in FIG. The heat medium pump 31 sucks the heat through the battery B and the heat medium flow passage 30 c in this order.

The refrigerant flowing through the refrigerant circuit 20 does not radiate heat in the radiator 15 because the indoor fan 12 is stopped and the opening degree of the air mix damper 17 is 0%, and heat is radiated in the outdoor heat exchanger 22. It absorbs heat in the medium heat exchanger 24 .

Further, the heat medium flowing through the heat medium circuit 30 is cooled by exchanging heat with the heat-absorbing refrigerant in the heat medium heat exchanger 24, and is heated in the battery B by receiving the heat released from the battery B.

Battery B is cooled by the heat medium cooled in heat medium heat exchanger 24 .

Further, when the battery cooling operation is performed simultaneously with the cooling operation, in the air conditioning unit 10, the indoor fan 12 is driven and the air mix damper 17 is set to 0% opening. In the refrigerant circuit 20, the first expansion valve 25a is fully opened, the first and second solenoid valves 26a and 26b are opened, the third and fourth solenoid valves 26c and 26d are closed, and the fifth solenoid valve 26e is opened. The compressor 21 is driven in this state. Furthermore, in the heat medium circuit 30, the heat medium pump 31 is driven.

As a result, in the refrigerant circuit 20, the refrigerant discharged from the compressor 21 flows through the main body of the refrigerant flow path 20a, the radiator 15, the refrigerant flow path 20b, and the outdoor heat exchanger 22, as indicated by solid line arrows in FIG. Refrigerant flow passage 20c, receiver portion 22b, subcooling portion 22c, refrigerant flow passage 20d, high pressure side of internal heat exchanger 23, and refrigerant flow passage 20e. A part of the refrigerant flowing through the refrigerant flow passage 22e flows through the heat absorber 14, the refrigerant flow passage 20f, the low-pressure side of the internal heat exchanger 23, and the refrigerant flow passage 20g in this order, and is sucked into the compressor 21. Other refrigerant flowing through the refrigerant flow passage 22e is sucked into the compressor 21 through the refrigerant flow passage 20j, the heat medium heat exchanger 24, and the refrigerant flow passages 20k and 20g in this order.

In the heat medium circuit 30, the heat medium discharged from the heat medium pump 31 flows through the heat medium flow path 30a, the heat medium heat exchanger 24, the heat medium flow path 30b, and the heat medium flow path 30b, as indicated by the dashed arrows in FIG. The heat medium pump 31 sucks the heat through the battery B and the heat medium flow passage 30 c in this order.

Since the opening of the air mix damper 17 is 0%, the refrigerant flowing through the refrigerant circuit 20 does not radiate heat in the radiator 15, but radiates heat in the outdoor heat exchanger 22, and the heat absorber 14 and the heat medium heat exchanger 24 endothermic at

The air flowing through the air flow passage 11 is cooled to the target blowout temperature TAO by exchanging heat with the heat absorbing refrigerant in the heat absorber 14 and is blown out into the passenger compartment.

Further, the heat medium flowing through the heat medium circuit 30 is cooled by exchanging heat with the heat-absorbing refrigerant in the heat medium heat exchanger 24, and is heated in the battery B by receiving the heat released from the battery B.

Battery B is cooled by the heat medium cooled in heat medium heat exchanger 24 .

Here, when the refrigerant absorbs heat simultaneously in the heat absorber 14 and the heat medium heat exchanger 24, such as when the battery cooling operation is performed at the same time as the cooling operation or the dehumidifying cooling operation, the heat absorbed by the refrigerant is reliably released. , the outdoor heat exchanger setting means causes the outdoor heat exchanger 22 to function as a radiator.

The controller 40 also performs operation switching control processing for switching between starting and stopping the air conditioning operation by the air conditioning unit 10 and the refrigerant circuit 20 and starting and stopping the battery cooling operation by the refrigerant circuit 20 and the heat medium circuit 30 . The operation of the controller 40 at this time will be described with reference to the flow charts of FIGS. 5 and 6. FIG.

(Step S1)
In step S1, the CPU, as quick charge determination means, determines whether or not the battery B is being charged by quick charging. If it is determined that the battery B is being charged by rapid charging, the process proceeds to step S16, and if it is not determined that the battery B is being charged by rapid charging, the process is moved to step S2.
Here, whether or not the battery B is being charged by rapid charging is determined based on the detected values of the voltage and current of the electric power supplied to the battery B. FIG.

(Step S2)
If it is not determined in step S1 that the battery B is being charged by rapid charging, in step S2 the CPU determines that cooling of the battery B is necessary and dehumidification/heating operation is performed as battery cooling determination means and air conditioning determination means. It is determined whether or not air conditioning in the passenger compartment is necessary. If it is determined that the cooling of the battery B is necessary and the air conditioning of the vehicle interior such as the dehumidification/heating operation is necessary, the process proceeds to step S3, and the cooling of the battery B is necessary and the dehumidification/heating operation etc. is performed. If it is not determined that air conditioning in the vehicle interior is necessary, the process proceeds to step S10.
Here, whether or not battery B needs to be cooled is determined based on the temperature Tw of the heat medium flowing through heat medium circuit 30 detected by heat medium temperature sensor 51 .
Further, whether or not air conditioning in the passenger compartment is necessary depends on the difference between the set temperature Tset set by the passenger and the temperature Tr detected by the inside air temperature sensor 42, or the humidity Rh detected by the inside air humidity sensor 46. determined based on

(Step S3)
When it is determined in step S2 that cooling of the battery B is necessary and air conditioning in the vehicle compartment such as dehumidification/heating operation is necessary, in step S3, the CPU determines dehumidification and cooling of the vehicle compartment as air conditioning determination means. Determine whether or not it is necessary. If it is determined that there is no need to dehumidify and cool the vehicle interior, the process proceeds to step S5, and if it is determined that there is no need to dehumidify and cool the vehicle interior, the process proceeds to step S4.
Here, whether dehumidification of the vehicle interior is necessary or not is determined based on an input to the setting operation unit 52 for switching execution or cancellation of dehumidification.

(Step S4)
If it is not determined in step S3 that dehumidification and cooling of the passenger compartment are not necessary, in step S4 the CPU sets the valve opening degree of the first expansion valve 25a in the refrigerant circuit 20 as the outdoor heat exchanger setting means. The outdoor heat exchanger 22 is fully opened to function as a heat radiator, and the second and fifth electromagnetic valves 26b and 26e are opened to cool the air flowing through the air flow passage 11 by the heat absorber 14, thereby forming a heat medium heat exchanger. 24 sets the battery cooling/air conditioning mode for cooling the heat medium flowing through the heat medium circuit 30, and the process proceeds to step S6.
Here, the air flowing through the air flow passage 11 is heated by the radiator 15 by setting the opening of the air mix damper 17 to be greater than 0%.
In the battery cooling priority mode in which cooling of the battery B is prioritized over cooling of the vehicle interior, the rotation speed of the compressor 21 is adjusted so that the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 becomes the target heat medium temperature TWO. to control. In the battery cooling priority mode, the temperature of the refrigerant in the heat absorber 14 is controlled by adjusting the circulation of the refrigerant in the heat absorber 14 by opening and closing the second electromagnetic valve 26b.
In the air conditioning priority mode in which the cooling of the passenger compartment is prioritized over the cooling of the battery B, the rotational speed of the compressor 21 is adjusted so that the air temperature Te detected by the cooling air temperature sensor 44 becomes the target cooling air temperature TEO. to control. In the air conditioning priority mode, the temperature of the refrigerant in the heat medium heat exchanger 24 is controlled by adjusting the flow of the refrigerant in the heat medium heat exchanger 24 by opening and closing the fifth solenoid valve 26e.

(Step S5)
When it is determined in step S3 that dehumidification and cooling of the vehicle interior are not necessary, in step S5, the CPU sets the valve opening degree of the first expansion valve 25a to full open in the refrigerant circuit 20 as the outdoor heat exchanger setting means. The outdoor heat exchanger 22 is made to function as a radiator, the second electromagnetic valve 26b is closed to stop the cooling of the air flowing through the air flow passage 11 by the heat absorber 14, and the fifth electromagnetic valve 26e is opened to release the heat. The process proceeds to step S6 as a battery cooling independent mode in which the heat medium flowing through the heat medium circuit 30 is cooled by the medium heat exchanger 24 .
Here, the air flowing through the air circulation passage 11 is heated by the radiator 15 by setting the opening degree of the air mix damper 17 to be greater than 0% as supply air heating means.

(Step S6)
In step S6, the CPU displays on the display unit 53 that the battery cooling operation is being performed, and shifts the process to step S7.

(Step S7)
In step S7, the CPU determines whether or not the amount of heat released by the radiator 15 is insufficient. If it is determined that the amount of heat radiated from the radiator 15 is insufficient, the process proceeds to step S8, and if it is not determined that the amount of heat radiated from the radiator 15 is insufficient, the process proceeds to step S9.
Here, the fact that the amount of heat released by the radiator 15 is insufficient means that the temperature Tc of the air after being heated by the radiator 15 detected by the heated air temperature sensor 45 is lower than the target heated air temperature TCO by the predetermined temperature α. A low state continues for a predetermined time.

(Step S8)
When it is determined in step S7 that the amount of heat radiated by the radiator 15 is insufficient, in step S8 the CPU drives the air heater 16 as a means for compensating for the insufficient amount of heat and means for heating the supplied air, and performs operation switching control processing. finish.

(Step S9)
If it is not determined in step S7 that the amount of heat radiated by the radiator 15 is insufficient, in step S9 the CPU stops driving the air heater 16 and ends the operation switching control process.

(Step S10)
If it is not determined in step S2 that cooling of the battery B is required and air conditioning in the vehicle compartment such as dehumidifying heating operation is not required, in step S10 the CPU determines whether air conditioning such as dehumidifying heating operation is required as air conditioning determination means. It is determined whether or not air conditioning in the passenger compartment is required. If it is determined that the vehicle interior needs to be air-conditioned, the process proceeds to step S11, and if it is determined that the vehicle interior does not need to be air-conditioned, the process proceeds to step S12.
Here, whether air conditioning in the passenger compartment is necessary or not depends on the difference between the set temperature Tset set by the passenger and the temperature Tr detected by the inside air temperature sensor 42, or the humidity detected by the inside air humidity sensor 46. Determined based on Rh.

(Step S11)
When it is determined in step S10 that air conditioning in the passenger compartment is necessary, in step S11, the CPU selects an air conditioning single mode that performs normal air conditioning operation such as cooling operation, dehumidifying cooling operation, heating operation, dehumidifying heating operation, etc. End the switching control process.

(Step S12)
If it is not determined in step S10 that air conditioning in the vehicle interior is necessary, the CPU, as battery cooling determination means, determines in step S12 whether cooling of battery B is necessary. If it is determined that battery B needs to be cooled, the process proceeds to step S13, and if it is determined that battery B does not need to be cooled, the process proceeds to step S15.
Here, whether or not battery B needs to be cooled is determined based on the temperature Tw of the heat medium flowing through heat medium circuit 30 detected by heat medium temperature sensor 51 .

(Step S13)
When it is determined in step S12 that the battery B needs to be cooled, in step S13, the first expansion valve 25a in the refrigerant circuit 20 is fully opened to cause the outdoor heat exchanger 22 to function as a radiator. At the same time, the second solenoid valve 26b is closed to stop the cooling of the air flowing through the air flow passage 11 by the heat absorber 14, the fifth solenoid valve 26e is opened, and the heat medium circuit 30 is opened by the heat medium heat exchanger 24. The process proceeds to step S14 as the independent battery cooling mode for cooling the circulating heat medium.

(Step S14)
In step S14, the CPU displays on the display unit 53 that the battery cooling operation is being performed, and ends the operation switching control process.

(Step S15)
If it is not determined in step S12 that battery B needs to be cooled, in step S15 the CPU stops the air conditioning operation and the battery cooling operation, and terminates the operation switching control process.
Here, stopping the air conditioning operation and the battery cooling operation means stopping the driving of the indoor fan 12 and the compressor 21 and closing the second and fifth electromagnetic valves 26b and 26e.

(Step S16)
When it is determined in step S1 that the battery B is being charged by rapid charging, in step S16 the CPU determines whether cooling of the battery B is necessary as battery cooling determining means. If it is determined that battery B needs to be cooled, the process proceeds to step S17, and if it is determined that battery B does not need to be cooled, the process proceeds to step S18.
Here, whether or not battery B needs to be cooled is determined based on the temperature Tw of the heat medium flowing through heat medium circuit 30 detected by heat medium temperature sensor 51 .

(Step S17)
When it is determined in step S16 that battery B needs to be cooled, in step S17 the CPU, as air conditioning determination means, determines whether air conditioning in the vehicle compartment such as dehumidification/heating operation is required. If it is determined that air conditioning in the passenger compartment is required, the process proceeds to step S3, and if it is not determined that air conditioning in the passenger compartment is required, the process proceeds to step S13.
Here, whether air conditioning in the passenger compartment is necessary or not depends on the difference between the set temperature Tset set by the passenger and the temperature Tr detected by the inside air temperature sensor 42, or the humidity detected by the inside air humidity sensor 46. Determined based on Rh.

(Step S18)
If it is not determined in step S16 that battery B needs to be cooled, in step S18 the CPU determines whether or not it has been determined that battery B needs to be cooled after the start of rapid charging. If it is determined that cooling of battery B is necessary after the start of quick charging, the process proceeds to step S19 as setting holding means, and it is determined that cooling of battery B is necessary after the start of quick charging. If it is not determined that the determination has been made, the process proceeds to step S20.

(Step S19)
When it is determined in step S18 that it is determined that cooling of the battery B is necessary after the start of rapid charging, in step S19 the CPU, as air conditioning determination means, determines whether air conditioning in the vehicle compartment such as dehumidification/heating operation is necessary. Determine whether or not there is If it is determined that the air conditioning of the passenger compartment is required, the process proceeds to step S3, and if it is determined that the air conditioning of the passenger compartment is not required, the process proceeds to step S15.
Here, whether air conditioning in the passenger compartment is necessary or not depends on the difference between the set temperature Tset set by the passenger and the temperature Tr detected by the inside air temperature sensor 42, or the humidity detected by the inside air humidity sensor 46. Determined based on Rh.

(Step S20)
If it is not determined in step S18 that the battery B needs to be cooled after the start of rapid charging, in step S20 the CPU determines whether the vehicle interior air conditioning such as dehumidification/heating operation is on as the air conditioning determination means. Determine whether it is necessary. If it is determined that air conditioning in the passenger compartment is required, the process proceeds to step S11, and if it is not determined that air conditioning in the passenger compartment is required, the process proceeds to step S15.
Here, whether air conditioning in the passenger compartment is necessary or not depends on the difference between the set temperature Tset set by the passenger and the temperature Tr detected by the inside air temperature sensor 42, or the humidity detected by the inside air humidity sensor 46. Determined based on Rh.

As described above, according to the vehicle air conditioner of the present embodiment, when it is determined that the temperature or humidity in the vehicle compartment needs to be adjusted and it is determined that the battery B needs to be cooled, The outdoor heat exchanger 22 is made to function as a radiator.

As a result, the heat can be reliably absorbed by the refrigerant in the heat absorber 14 and the heat medium heat exchanger 24, thereby suppressing insufficient cooling capacity when cooling the battery B and cooling the air supplied to the passenger compartment. becomes possible.

Moreover, since the outdoor heat exchanger 22 functions as a radiator, the air heater 16 compensates for the insufficient amount of heat radiation when the amount of heat radiation from the radiator 15 is insufficient.

As a result, the outdoor heat exchanger 22 functions as a radiator, so that the air heater 16 can compensate for the insufficient amount of heat radiation in the radiator 15, so that it is possible to prevent the deterioration of the heating capacity in the air conditioning operation. becomes.

In addition, when there is no need to dehumidify and cool the vehicle interior and it is necessary to heat the air supplied to the vehicle interior, the flow of the refrigerant to the heat absorber 14 is regulated, and the heat released from the radiator 15, or , the radiator 15 and the air heater 16 heat the air supplied to the passenger compartment.

This allows the refrigerant to absorb heat only in the heat medium heat exchanger 24 without allowing the refrigerant to absorb heat in the heat absorber 14, so that the battery B can be cooled reliably. Moreover, it is possible to perform heating when the vehicle interior needs to be heated.

A first expansion valve 25a whose valve opening degree can be adjusted is provided on the upstream side of the outdoor heat exchanger 22 in the refrigerant flow direction.

As a result, by fully opening the valve opening of the first expansion valve 25a, the outdoor heat exchanger 22 can be made to function as a radiator, and the refrigerant circuit 20 can be made to have a simple circuit configuration, reducing the manufacturing cost. can be reduced.

A second solenoid valve 26b for opening and closing the refrigerant flow passage 20e and a second expansion valve 25b for decompressing the refrigerant are provided on the upstream side of the heat absorber 14 in the refrigerant flow direction. A fifth solenoid valve 26e that opens and closes the refrigerant flow passage 20j and a third expansion valve 25c that decompresses the refrigerant are connected to the upstream side in the direction, and the temperature of the air cooled by the heat absorber 14 and the heat medium One of the temperatures of the battery B cooled by the heat exchanger 24 is controlled by adjusting the rotation speed of the compressor 21, and the temperature of the air cooled by the heat absorber 14 and the temperature of the air cooled by the heat medium heat exchanger 24 are controlled. The other temperature of the battery B is controlled by switching the degree of opening of the second and fifth solenoid valves 26b, 26e between fully open and fully closed.

As a result, the temperature Te of the air cooled in the heat absorber 14 can be controlled only by switching the second solenoid valve 26b, and the air is cooled in the heat medium heat exchanger 24 only by switching the fifth solenoid valve 26e. Since the temperature of the battery B can be controlled, the control becomes a simple configuration, and the manufacturing cost can be reduced.

Further, when it is determined that the temperature or humidity in the vehicle compartment needs to be adjusted and it is not determined that the battery B needs to be cooled, the flow of the refrigerant to the heat medium heat exchanger 24 is restricted.

As a result, when there is no need to cool the battery B, the refrigerant flowing through the refrigerant circuit 20 does not flow through the heat medium heat exchanger 24, thereby reducing the pressure loss of the refrigerant flowing through the refrigerant circuit 20. It is possible to improve the operating efficiency.

Further, when it is determined that the temperature or humidity in the passenger compartment does not need to be adjusted and it is determined that the battery B needs to be cooled, the flow of refrigerant to the heat absorber 14 is restricted.

As a result, the refrigerant flowing through the refrigerant circuit 20 does not flow through the heat absorber 14 when there is no need to air-condition the vehicle interior, so the pressure loss of the refrigerant flowing through the refrigerant circuit 20 can be reduced. , it is possible to improve the operating efficiency.

Further, when it is determined that the battery B needs to be cooled in a state where it is determined that the battery B is being charged by rapid charging, and after it is determined that the battery B needs to be cooled, the outdoor The setting of the heat exchanger 22 as a radiator is maintained.

As a result, during rapid charging in which the cooling of the battery B is highly necessary, when restarting cooling of the battery B, the operation of the outdoor heat exchanger 22, such as stopping the compressor 21 and switching the refrigerant flow path in the refrigerant circuit 20, is performed. Since there is no need for a switching operation necessary for switching settings, battery B can be efficiently cooled.

Further, a display unit 53 for informing information about cooling of the battery B is provided.

As a result, it is possible to notify the user of the state in which the battery cooling operation is being performed, so that it is possible to prevent the user from erroneously determining that the device is out of order.

In the above-described embodiment, in the battery cooling priority mode, the control of the temperature Te of the air cooled by the heat absorber 14 is performed by the second electromagnetic valve provided on the upstream side of the mechanical second expansion valve 25b in the refrigerant flow direction. Although what is performed by switching the opening degree of 26b between fully open and fully closed has been shown, it is not limited to this. For example, instead of the mechanical second expansion valve 25b and the second solenoid valve 26b, an electronic expansion valve with a variable opening degree is provided on the upstream side of the heat absorber 14 in the refrigerant flow direction, and in the battery cooling priority mode, the heat absorber The temperature Te of the air cooled by 14 may be controlled by adjusting the opening degree of the electronic expansion valve.

In the above-described embodiment, in the air conditioning priority mode, the temperature Tw of the heat medium cooled by the heat medium heat exchanger 24 is controlled by the third mechanical expansion valve 25c provided upstream in the refrigerant flow direction. Although what is performed by switching the opening degree of the 5 solenoid valve 26e between fully open and fully closed is shown, it is not limited to this. For example, instead of the mechanical third expansion valve 25c and the fifth solenoid valve 26e, an electromagnetic expansion valve with a variable opening degree is provided on the upstream side of the heat medium heat exchanger 24 in the refrigerant flow direction, and in the air conditioning priority mode, The temperature Tw of the heat medium cooled by the heat medium heat exchanger 24 may be controlled by adjusting the opening degree of the electronic expansion valve.

Further, in the above-described embodiment, in the battery cooling priority mode, the temperature Te of the air cooled by the heat absorber 14 is controlled by switching the second solenoid valve 26b between fully open and fully closed. It is not limited to switching between fully open and fully closed two solenoid valves 26b. For example, the temperature Te of the air cooled by the heat absorber 14 may be controlled by switching between two different valve opening degrees other than full open and full close of the solenoid valve.

Further, in the above-described embodiment, in the air conditioning priority mode, the temperature Tw of the heat medium cooled by the heat medium heat exchanger 24 is controlled by switching the fifth electromagnetic valve 26e between fully open and fully closed. However, it is not limited to switching the fifth electromagnetic valve 26e between fully open and fully closed. For example, the temperature Tw of the heat medium cooled by the heat medium heat exchanger 24 may be controlled by switching between two different valve opening degrees other than full open and full close of the solenoid valve.

Further, in the above-described embodiment, the state in which the battery cooling operation is being performed is displayed on the display unit 53 to notify the passenger of the state in which the battery cooling operation is being performed. It is not limited. For example, the passenger may be notified of the operating states of the air-conditioning operation and the battery cooling operation by voice from a speaker.

Further, in the above-described embodiment, the battery B is cooled by the refrigerant flowing through the refrigerant circuit 20 via the heat medium flowing through the heat medium circuit 30, but the present invention is not limited to this. For example, the battery B may be directly cooled by refrigerant flowing through the refrigerant circuit 20 .

Further, in the above-described embodiment, the air heater 16 is arranged downstream of the radiator 15 in the refrigerant flow direction in the air flow passage 11 so that the air heated by the radiator 15 is heated by the air heater 16. However, it is not limited to this. The air heater may be arranged on the upstream side of the radiator 15 in the refrigerant flow direction in the air circulation passage 11 so that the air before being heated in the radiator 15 is heated by the air heater.

Further, in the above embodiment, the first expansion valve 25a whose valve opening degree can be adjusted is provided on the upstream side of the outdoor heat exchanger 22 in the refrigerant flow direction, and the valve opening degree of the first expansion valve 25a is fully opened. , the outdoor heat exchanger 22 is made to function as a radiator, but it is not limited to this. A mechanical expansion valve, a bypass channel connected in parallel to the refrigerant channel to which the expansion valve is connected, an electromagnetic valve that opens and closes the bypass channel, and may be provided, and the solenoid valve may be opened to allow the refrigerant to flow through the bypass channel, thereby causing the outdoor heat exchanger 22 to function as a radiator.

Further, in the above-described embodiment, the judgment as to whether or not the battery B needs to be cooled is performed based on the temperature Tw of the heat medium flowing through the heat medium circuit 30 detected by the heat medium temperature sensor 51. However, it is not limited to this. For example, whether or not battery B needs to be cooled may be determined based on the temperature of battery B detected by a battery temperature sensor capable of directly detecting the temperature of battery B. Further, whether it is necessary to cool the battery B based on the temperature Tw of the heat medium flowing through the heat medium circuit 30 detected by the heat medium temperature sensor 51 and the temperature of the battery B detected by the battery temperature sensor It may be determined whether or not

DESCRIPTION OF SYMBOLS 1... Vehicle air conditioner, 11... Air flow passage, 14... Heat absorber, 15... Radiator, 16... Air heating heater, 20... Refrigerant circuit, 21... Compressor, 22... Outdoor heat exchanger, 22d... Outdoor Blower 24 Heat medium heat exchanger 25a First expansion valve 25b Second expansion valve 25c Third expansion valve 26b Second solenoid valve 26e Fifth solenoid valve 30 Heat medium circuit , 40... Controller, 47... Refrigerant temperature sensor, 53... Display unit, B... Battery.

Claims (9)

A vehicle air conditioner having a battery cooling function for cooling a battery that supplies electric power to an electric motor for running a vehicle,
a compressor that compresses a refrigerant;
an indoor heat exchanger for exchanging heat between the air supplied to the vehicle interior and the refrigerant;
a battery cooling heat sink that absorbs heat emitted from the battery;
an outdoor heat exchanger that exchanges heat between the air outside the vehicle and the refrigerant;
air conditioning determination means for determining whether or not the temperature or humidity in the vehicle interior needs to be adjusted;
battery cooling determination means for determining whether cooling of the battery is necessary;
When the air conditioning determination means determines that the temperature or humidity in the vehicle interior needs to be adjusted and the battery cooling determination means determines that the battery needs to be cooled, the outdoor heat exchanger functions as a radiator. an outdoor heat exchanger setting means for
rapid charging determination means for determining whether or not the battery is being charged by rapid charging;
After the battery cooling determining means determines that the battery needs to be cooled while the rapid charging determining means determines that the battery is being charged by rapid charging, the battery cooling determining means determines that the battery needs to be cooled. a setting holding means for holding the setting of the outdoor heat exchanger as a radiator by the outdoor heat exchanger setting means when it is no longer determined that there is,
On the upstream side in the refrigerant flow direction of the heat absorber as an indoor heat exchanger and on the upstream side in the refrigerant flow direction of the heat absorber for cooling the battery, a flow path opening/closing valve for opening and closing the refrigerant flow path and an expansion valve for decompressing the refrigerant are provided. valve and are connected,
One of the temperature of the air cooled by the heat absorber and the temperature of the battery cooled by the battery cooling heat absorber is controlled by adjusting the rotation speed of the compressor, and the temperature of the air cooled by the heat absorber and The other temperature of the battery cooled by the battery cooling heat absorber is controlled by switching between two different opening degrees of the flow path on-off valve.
Vehicle air conditioner. an air heater for heating the air supplied to the vehicle interior;
a radiator as an indoor heat exchanger;
When the outdoor heat exchanger functions as a radiator by the outdoor heat exchanger setting means and the heat radiation from the radiator is insufficient, the lack of heat radiation from the radiator is compensated for by the air heater. The vehicle air conditioner according to claim 1, comprising means. a heat absorber as an indoor heat exchanger;
When the air-conditioning determining means determines that there is no need to dehumidify or cool the vehicle interior and that it is necessary to heat the air supplied to the vehicle interior, the flow of refrigerant to the heat absorber is regulated, and the refrigerant is discharged from the radiator. 3. The vehicle air conditioning apparatus according to claim 2, further comprising supply air heating means for heating the air supplied to the vehicle interior by heat or heat emitted from the radiator and the air heater. 4. The vehicle air conditioner according to any one of claims 1 to 3, wherein an expansion valve whose valve opening degree is adjustable is provided on the upstream side of the outdoor heat exchanger in the refrigerant flow direction. An expansion valve, a bypass channel connected in parallel to the channel to which the expansion valve is connected, and an on-off valve that opens and closes the bypass channel are provided on the upstream side of the outdoor heat exchanger in the refrigerant flow direction. The vehicle air conditioner according to any one of claims 1 to 3. On the upstream side in the refrigerant flow direction of the heat absorber as an indoor heat exchanger and on the upstream side in the refrigerant flow direction of the heat absorber for cooling the battery, a flow path opening/closing valve for opening and closing the refrigerant flow path and an expansion valve for decompressing the refrigerant are provided. valve and are connected,
One of the temperature of the air cooled by the heat absorber and the temperature of the battery cooled by the battery cooling heat absorber is controlled by adjusting the rotation speed of the compressor, and the temperature of the air cooled by the heat absorber and 6. The vehicle air conditioning apparatus according to any one of claims 1 to 5, wherein the other temperature of the battery cooled by the battery cooling heat absorber is controlled by switching the opening degree of the flow passage opening/closing valve between fully open and fully closed. . When the air-conditioning determination means determines that the temperature or humidity in the passenger compartment needs to be adjusted, and the battery cooling determination means determines that the battery does not need to be cooled, the refrigerant flow to the battery cooling heat absorber is restricted. The vehicle air conditioner according to any one of claims 1 to 6. When the air conditioning determining means does not determine that the temperature or humidity in the vehicle interior needs to be adjusted, and the battery cooling determining means determines that the battery needs to be cooled, the amount of refrigerant to the heat absorber as the indoor heat exchanger is reduced. The vehicle air conditioner according to any one of claims 1 to 7, wherein circulation is regulated. 9. The vehicle air conditioner according to any one of claims 1 to 8 , further comprising an informing means for informing a state in which the battery is being cooled by the battery cooling heat absorber.

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