JP7092429B2 - Vehicle air conditioner - Google Patents

Description

The present invention relates to a vehicle air conditioner applied to a vehicle having a battery for supplying power to an electric motor for traveling, such as an electric vehicle or a hybrid vehicle.

Conventionally, this type of vehicle air conditioner is provided with a refrigerant circuit having a compressor, an indoor heat exchanger, an outdoor heat exchanger, and an expansion valve, and supplies air that has been heat-exchanged with the refrigerant in the indoor heat exchanger into the vehicle interior. By doing so, the interior of the vehicle is cooled, heated, and dehumidified.

Further, as a vehicle equipped with the air conditioner for a vehicle, there is a vehicle such as an electric vehicle or a hybrid vehicle equipped with a traveling battery for supplying power to an electric motor as a drive source. The traveling battery may become hot and hot due to the release of heat when the vehicle continues to travel or is rapidly charged.

Therefore, in the vehicle, in order to cool the traveling battery, it is known that the traveling battery is connected to the cooling water circuit and the cooling water circuit is connected to the refrigerant circuit via the water-refrigerant heat exchanger. (For example, see Patent Document 1). In the vehicle, the traveling battery is cooled by the cooling water flowing through the cooling water circuit, and the cooling water that has absorbed the heat by cooling the traveling battery is dissipated by exchanging heat with the refrigerant flowing through the refrigerant circuit. ing.

Japanese Unexamined Patent Publication No. 2018-43741

In the vehicle air conditioner, when cooling the vehicle interior and cooling the traveling battery at the same time, if the respective loads are large, the cooling capacity may be insufficient.

Therefore, in the vehicle air conditioner, cooling priority operation is performed in which the rotation speed of the compressor is controlled according to the cooling load in the vehicle interior when the vehicle is running, and the battery is cooled when the running battery is rapidly charged. Battery cooling priority operation is performed to control the number of revolutions of the compressor according to the load.

However, in the vehicle air conditioner, since the cooling priority operation is performed while the vehicle is running, the cooling capacity of the running battery may be insufficient when the temperature of the running battery becomes high.

An object of the present invention is to provide an air conditioner for a vehicle capable of preventing the occurrence of a battery failure due to a high temperature of the battery.

The vehicle air conditioner of the present invention is a vehicle air conditioner having a battery cooling function for cooling a battery that supplies power to an electric motor for traveling a vehicle in order to achieve the above object, and compresses a refrigerant. A heat absorber that absorbs heat from the air supplied to the vehicle interior by exchanging heat between the compressor and the air supplied to the vehicle interior, and a battery cooling heat absorber that absorbs the heat released from the battery. When the quick charge determination means for determining whether or not the battery is charged by the rapid charge, the battery temperature sensor for detecting the temperature of the battery, and the rapid charge determination means determine that the battery is charged by the rapid charge. , The battery cooling priority control means that controls the temperature of the battery cooled by the heat absorber for cooling the battery by adjusting the rotation speed of the compressor, and the quick charge determination means do not determine that the battery is charged by quick charge. In this case, the air conditioning priority control means that controls the temperature of the air cooled in the heat absorber by adjusting the rotation speed of the compressor and the air conditioning priority control means that controls the temperature of the air cooled in the heat absorber. In the state, when the temperature of the battery detected by the battery temperature sensor is equal to or higher than a predetermined temperature, the priority control switching means for controlling the temperature of the battery cooled in the heat absorber for cooling the battery by the battery cooling priority control means. I have.

As a result, when the battery is being charged by quick charging, cooling of the battery is prioritized, and when the battery is not being rapidly charged, cooling or dehumidification of the vehicle interior is prioritized, and the battery is not being rapidly charged. However, when the temperature of the battery is equal to or higher than a predetermined temperature, the cooling of the battery is preferentially executed, so that the state in which the battery becomes hot is suppressed.

According to the present invention, it is possible to suppress a state in which the battery becomes hot, so that it is possible to reliably prevent the occurrence of battery malfunction.

It is a schematic block diagram of the air conditioner for vehicles which shows one Embodiment of this invention. It is a block diagram which shows the control system. It is a flowchart which shows the operation switching control process. It is a flowchart which shows the operation switching control process.

1 to 4 show an embodiment of the present invention.

The vehicle air conditioner 1 of 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.

The vehicle has an electric motor for traveling and a battery B for traveling in which electric power supplied to the electric motor is stored.

The battery B releases heat when supplying electric power to the electric motor or charging the electric motor while the vehicle is traveling. The 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 the current of the electric power to be supplied, and the amount of heat dissipated is particularly large during the rapid charging. It is desirable to use the battery B in the range of, for example, 10 ° C. to 30 ° C., and deterioration is accelerated at a high temperature of 50 ° C. or higher. Therefore, the battery B needs to be cooled as needed to maintain a predetermined temperature of less than T1 (for example, 50 ° C.).

The vehicle air conditioner 1 has a battery cooling function for cooling the battery B. 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 the vehicle interior and outside the vehicle interior, and a battery B. A heat medium circuit 30 for distributing a heat medium is provided.

The air conditioning unit 10 has an air flow passage 11 for circulating the air supplied into the vehicle interior. On one end side of the air flow passage 11, an outside air suction port 11a for allowing air outside the vehicle interior to flow into the air flow passage 11 and an inside air suction port 11b for allowing air inside the vehicle interior to flow into the air flow passage 11 are provided. Is provided. Further, on the other end side of the air flow passage 11, a foot outlet (not shown) that blows out the air flowing through the air flow passage 11 toward the occupant's feet, and a vent (not shown) that blows out toward the occupant's upper body. An air outlet and a differential air outlet (not shown) that blows air toward the vehicle interior side surface of the windshield of the vehicle are provided.

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

On one end side of the air flow passage 11, a suction port switching damper 13 capable of opening one of the outside air suction port 11a and the inside air suction port 11b and closing the other is provided. The suction port switching damper 13 has an outside air supply mode in which the inside air suction port 11b is closed and the outside air suction port 11a is opened, an inside air circulation mode in which the outside air suction port 11a is closed and the inside air suction port 11b is opened, and an outside air suction port. By locating it between the 11a and the inside air suction port 11b, it is possible to switch between the inside and outside air suction modes in which the outside air suction port 11a and the inside air suction port 11b are opened.

A heat absorber 14 for cooling and dehumidifying the air flowing through the air flow passage 11 is provided on the downstream side of the indoor blower 12 in the air flow passage 11 in the air flow direction. Further, on the downstream side of the heat absorber 14 in the air flow passage 11 in the air flow direction, a radiator 15 for heating the air flowing through the air flow passage 11 is provided.

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

An air mix damper 17 for adjusting the ratio of the air heated by the radiator 15 to the air passing through the heat absorber 14 is provided between the heat absorber 14 and the radiator 15 in the air flow passage 11. ing. The air mix damper 17 closes one of the radiator bypass flow passage 11c and the radiator 15 upstream in the air flow direction and opens the other on the upstream side of the radiator 15 and the radiator bypass flow passage 11c in the air flow direction. 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 flow direction. The air mix damper 17 has an opening degree of 0% with the radiator bypass flow passage 11c open by closing the upstream side of the radiator 15 in the air flow passage 11 in the air flow direction, and the radiator 15 in the air flow passage 11 has an opening degree of 0%. The opening degree becomes 100% in a state where the upstream side in the air flow 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 heat exchange between the refrigerant and the air outside the vehicle interior, and the heat exchanger 14. Internal heat exchanger 23 for heat exchange between the refrigerant and the refrigerant flowing out of the heat absorber 14, battery cooling heat absorption for heat exchange between the refrigerant flowing through the refrigerant circuit 20 and the heat medium flowing through the heat medium circuit 30 The heat medium heat exchanger 24 as a container, the electronic first expansion valve 25a whose valve opening can be adjusted between fully closed and fully open, the heat absorber 14, and the refrigerant at the outlets of the heat medium heat exchanger 24. Mechanical second and third expansion valves 25b, 25c whose valve opening is adjusted according to temperature changes, first to fifth electromagnetic valves 26a as flow path on-off valves for opening and closing the flow path of the refrigerant, 26b, 26c, 26d, 26e, a check valve 27 for regulating the flow direction of the refrigerant in the flow path of the refrigerant, separating the gas refrigerant and the liquid refrigerant and sucking the liquid refrigerant into the compressor 21. There is an accumulator 28 for preventing the above, and these are connected by, for example, 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 interior such as an engine room so that the flow direction of the air that exchanges heat with the refrigerant is the front-rear direction of the vehicle. In the vicinity of the outdoor heat exchanger 22, an outdoor blower 22d for circulating air outside the vehicle interior in the front-rear direction when the vehicle is stopped is provided. The outdoor heat exchanger 22 has a main body 22a for radiating or absorbing heat of the refrigerant, a receiver 22b for flowing the radiated refrigerant to separate the gaseous refrigerant from the liquid refrigerant, and a receiver 22b. It has an overcooling unit 22c for bringing the liquid refrigerant flowing out of the water into an overcooled state.

Specifically, the configuration of the refrigerant circuit 20 will be described. A refrigerant flow passage 20a 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 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 flow passage 20b is provided with a first expansion valve 25a. 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 main body portion 22a of the outdoor heat exchanger 22. A first solenoid valve 26a is provided in the refrigerant flow passage 20c. Further, the refrigerant inflow side of the supercooling unit 22c is connected to the refrigerant outflow side of the receiver unit 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 supercooling unit 22c. A refrigerant flow passage 20e 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. The refrigerant flow passage 20e is provided with a check valve 27, a second solenoid valve 26b, and a second expansion valve 25b in this order from the internal heat exchanger 23 side. A refrigerant flow passage 20f 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 20 g 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 20 g. Further, the outdoor heat exchanger 22 is bypassed between the radiator 15 and the first expansion valve 25a in the refrigerant flow passage 20b, and the check valve 27 and the second electromagnetic valve 26b in the refrigerant flow passage 20e are separated from each other. By connecting, the refrigerant flow passage 20h is formed. A third solenoid valve 26c is provided in the refrigerant flow passage 20h. Refrigerant flow by connecting between the main body 22a of the outdoor heat exchanger 22 in the refrigerant flow passage 20c and the first electromagnetic valve 26a between the internal heat exchanger 23 and the accumulator 28 in the refrigerant flow passage 20g. The road 20i is formed. A fourth solenoid valve 26d is provided in the refrigerant flow passage 20i. Further, a refrigerant flow passage 20j is formed by connecting the refrigerant inflow side of the heat medium heat exchanger 24 between the check valve 27 and the second solenoid valve 26b in the refrigerant flow passage 20e. The refrigerant flow passage 20j is provided with a fifth solenoid valve 26e and a third expansion valve 25c in this order from the refrigerant flow passage 20e side. On the refrigerant outflow side of the heat medium heat exchanger 24, a refrigerant flow passage 20k is formed 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, for example, an aluminum tube or a copper tube. As the heat medium flowing through the heat medium circuit 30, for example, an antifreeze solution such as ethylene glycol is used.

More specifically, a heat medium flow passage 30a is formed on the heat medium discharge side of the heat medium pump 31 by connecting the heat medium inflow side of the heat medium heat exchanger 24. A heat medium flow passage 30b 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 passage 30c is formed by connecting the heat medium suction side of the heat medium pump 31 to the heat medium outflow side of the battery B.

Further, the vehicle air conditioner 1 includes a controller 40 for controlling the temperature and humidity in the vehicle interior to be set to a set temperature and humidity, and controlling the battery B to be cooled to a predetermined temperature or lower. There is.

The controller 40 has a CPU, a ROM, and a RAM. When the controller 40 receives an input signal from a device connected to the input side, the CPU reads a program stored in the ROM based on the input signal and stores the state detected by the input signal in the RAM. , 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 vehicle interior, an inside air temperature sensor 42 for detecting the temperature Tr inside the vehicle interior, and air. It is heated by the intake air temperature sensor 43 for detecting the temperature Ti of the air flowing into the flow passage 11, the cooling air temperature sensor 44 for detecting the temperature Te of the air after being cooled in the heat absorber 14, and the radiator 15. The heated air temperature sensor 45 for detecting the temperature Tc of the air after heat exchange, the inside air humidity sensor 46 for detecting the humidity Rh in the vehicle interior, and the temperature Tex of the refrigerant after heat exchange in the outdoor heat exchanger 22 are detected. The refrigerant temperature sensor 47 for detecting the solar radiation amount Ts, for example, a photosensor type solar radiation sensor 48 for detecting the speed V of the vehicle, the speed sensor 49 for detecting the speed V of the vehicle, and the pressure Pd on the high pressure side of the refrigerant circuit 20 are detected. 50, a heat medium temperature sensor 51 as a battery temperature sensor for detecting the temperature of the heat medium flowing out of the heat medium heat exchanger 24 in the heat medium circuit 30, and a set temperature Tset in the vehicle interior by the passenger. A setting operation unit 52 and a battery B for making settings related to setting and switching of air conditioning operation contents are connected.

On the output side of the controller 40, as shown in FIG. 2, an air heater 16, a compressor 21, a first expansion valve 25a, first to fifth solenoid valves 26a, 26b, 26c, 26d, 26e, and an interior of the vehicle interior. A display unit 53 as a notification means such as a liquid crystal display for displaying information such as temperature and operating state is connected.

In the vehicle air conditioner 1 configured as described above, the temperature and humidity of the air in the vehicle interior are adjusted by using the air conditioning unit 10 and the refrigerant circuit 20. Specifically, the vehicle air conditioner 1 has a cooling operation that lowers the temperature inside the vehicle interior, a dehumidifying cooling operation that lowers the humidity in the vehicle interior and lowers the temperature, and a heating operation that raises the temperature inside the vehicle interior. And the dehumidifying and heating operation that lowers the humidity in the vehicle interior and raises the temperature.

Further, the vehicle air conditioner 1 performs a battery cooling operation for cooling the battery B by using the refrigerant circuit 20 and the heat medium circuit 30.

For example, when the battery cooling operation is performed at the same time as the cooling operation, the indoor blower 12 is driven in the air conditioning unit 10 and the air mix damper 17 is set to 0%. Further, 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. Further, 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 is the refrigerant flow passage 20a, the radiator 15, the refrigerant flow passage 20b, and the main body of the outdoor heat exchanger 22, as shown by the solid line arrow in FIG. The flow is in the order of the section 22a, the refrigerant flow path 20c, the receiver section 22b, the overcooling section 22c, the refrigerant flow passage 20d, the high pressure side of the internal heat exchanger 23, and the refrigerant flow passage 20e. A part of the refrigerant flowing through the refrigerant flow passage 22e flows in the order of 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, and is sucked into the compressor 21. Further, the other refrigerants flowing through the refrigerant flow passage 22e are circulated in the order of the refrigerant flow passage 20j, the heat medium heat exchanger 24, and the refrigerant flow passages 20k and 20g, and are sucked into the compressor 21.

Further, in the heat medium circuit 30, the heat medium discharged from the heat medium pump 31 is the heat medium flow passage 30a, the heat medium heat exchanger 24, the heat medium flow passage 30b, as shown by the arrow of the broken line in FIG. The battery B and the heat medium flow passage 30c circulate in this order and are sucked into the heat medium pump 31.

Since the opening degree of the air mix damper 17 is 0%, the refrigerant flowing through the refrigerant circuit 20 does not dissipate heat in the radiator 15, but dissipates heat in the outdoor heat exchanger 22 and absorbs heat in the heat absorber 14.

The air flowing through the air flow passage 11 is cooled to the target blowing temperature TAO by exchanging heat with the refrigerant that absorbs heat in the heat absorber 14, and is blown into the vehicle interior.

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

The battery B is cooled by the heat medium cooled in the heat medium heat exchanger 24.

Further, for example, in the dehumidifying and cooling operation in which the temperature and humidity in the vehicle interior are lowered, the opening degree of the air mix damper 17 of the air conditioning unit 10 is opened by more than 0% in the flow path of the refrigerant of the refrigerant circuit 20 during the cooling operation. Set to degree.

As a result, the refrigerant flowing through the refrigerant circuit 20 dissipates 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 passage 11 is dehumidified and cooled by exchanging heat with the refrigerant that absorbs heat in the heat absorber 14, and is heated to the target blowing temperature TAO in the radiator 15 and blown into the vehicle interior.

Further, for example, in the dehumidifying / heating operation in which the humidity in the vehicle interior is lowered and the temperature is raised, the first expansion valve 25a is opened at a predetermined valve opening smaller than that fully opened in the flow path of the refrigerant of the refrigerant circuit 20 during the cooling operation. And. Further, the opening degree of the air mix damper 17 of the air conditioning unit 10 is set to an opening degree larger than 0%.

As a result, the refrigerant flowing through the refrigerant circuit 20 dissipates 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 refrigerant that absorbs heat in the heat absorber 14, and is heated to the target blowing temperature TAO in the radiator 15 and blown out.

Here, in order to ensure that the heat absorbed by the refrigerant is released when the heat absorber 14 and the heat medium heat exchanger 24 simultaneously absorb heat, such as when the battery cooling operation is performed at the same time as the cooling operation or the dehumidifying cooling operation. , The outdoor heat exchanger 22 is made to function as a radiator.

Further, the controller 40 performs an operation switching control process for switching the start and stop of the air conditioning operation by the air conditioning unit 10 and the refrigerant circuit 20, and the start and stop of 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 flowcharts of FIGS. 3 and 4.

(Step S1)
In step S1, the CPU determines whether or not the battery B is being charged by quick charging as a quick charging determination means. If it is determined that the battery B is being charged by rapid charging, the process is transferred to step S2, and if it is not determined that the battery B is being charged by rapid charging, the process is transferred to step S15.
Here, whether or not the battery B is being charged by rapid charging is determined based on the detected values of the voltage and the current of the electric power supplied to the battery B.

(Step S2)
When it is determined in step S1 that the battery B is being charged by rapid charging, the CPU determines in step S2 whether or not the battery B needs to be cooled. If it is determined that the battery B needs to be cooled, the process is transferred to step S3, and if it is not determined that the battery B needs to be cooled, the process is transferred to step S10.
Here, whether or not the battery B needs to be cooled is determined based on the temperature Tw of the heat medium flowing through the heat medium circuit 30 detected by the heat medium temperature sensor 51.

(Step S3)
When it is determined in step S2 that the battery B needs to be cooled, in step S3, the CPU determines whether or not air conditioning in the vehicle interior such as cooling operation or dehumidifying cooling operation is necessary. If it is determined that air conditioning in the vehicle interior is necessary, the process is transferred to step S4, and if it is not determined that air conditioning in the vehicle interior is necessary, the process is transferred to step S8.
Here, whether or not air conditioning in the vehicle interior is required 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, and the humidity detected by the inside air humidity sensor 46. Determined based on Rh.

(Step S4)
When it is determined in step S3 that air conditioning in the vehicle interior is necessary, in step S4, the CPU air-conditions in the battery cooling priority mode in which the cooling of the battery B is prioritized over the air conditioning in the vehicle interior as the battery cooling priority control means. Perform operation and battery cooling operation.
Here, in the battery cooling priority mode, the fifth electromagnetic valve 26e is opened, and the rotation speed of the compressor 21 is controlled so that the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 becomes the target heat medium temperature TWO. do.
Further, in the battery cooling priority mode, the temperature of the refrigerant in the heat absorber 14 is controlled by adjusting the flow of the refrigerant in the heat absorber 14 by opening and closing the second solenoid valve 26b.
In the battery cooling priority mode, the controller 40 determines whether or not dehumidification of the vehicle interior is necessary as a dehumidification determination means, and when it is determined that dehumidification of the vehicle interior is not necessary, the controller 40 is detected by the intake air temperature sensor 43. The opening / closing operation of the second electromagnetic valve 26b is controlled based on the temperature Ti of the air flowing into the air flow passage 11. The second electromagnetic valve 26b opens the refrigerant flow passage 20e when the temperature Ti detected by the intake air temperature sensor 43 becomes higher than the target outlet temperature TAO by a predetermined temperature γ1 when it is determined that dehumidification of the vehicle interior is not necessary. When the temperature Ti detected by the intake air temperature sensor 43 becomes equal to or lower than the lower limit value (for example, 3 ° C.) lower than the target outlet temperature TAO, the refrigerant flow passage 20e is closed.
Further, in the battery cooling priority mode, the controller 40 determines whether or not dehumidification of the vehicle interior is necessary as a dehumidification determination means, and when it is determined that dehumidification of the vehicle interior is necessary, the cooling air temperature sensor 44 The opening / closing operation of the second electromagnetic valve 26b is controlled based on the Te of the air detected by. The second electromagnetic valve 26b has a target cooling air temperature at which the temperature Te detected by the cooling air temperature sensor 44 is the target temperature of the air cooled in the heat absorber when it is determined that the interior of the vehicle needs to be dehumidified. When the predetermined temperature γ2 is higher than the TEO, the refrigerant flow passage 20e is opened, and when the temperature Te detected by the cooling air temperature sensor 44 becomes lower than the lower limit value (for example, 2 ° C.) lower than the target cooling air temperature TEO, the refrigerant is used. Close the flow passage 20e.
The determination as to whether or not dehumidification of the vehicle interior is necessary is performed based on the input of switching the execution or cancellation of the dehumidification to the setting operation unit 52.

(Step S5)
In step S5, the CPU determines whether or not the cooling capacity of the battery B is insufficient. If it is determined that the cooling capacity of the battery B is insufficient, the process is transferred to step S6, and if it is not determined that the cooling capacity of the battery B is insufficient, the process is transferred to step S7.
The state in which the cooling capacity of the battery B is insufficient means that the rotation speed NC of the compressor 21 is larger than a predetermined rotation speed (for example, 4000 rpm) and the temperature of the heat medium Tw detected by the heat medium temperature sensor 51. Is a state in which a predetermined temperature α higher than the target heat medium temperature TWO continues for a predetermined time or longer.

(Step S6)
When it is determined in step S5 that the cooling capacity of the battery B is insufficient, the CPU stops the air conditioning operation as an air conditioning operation controlling means in step S6, and shifts the process to step S7.
Here, stopping the air conditioning operation means closing the second solenoid valve 26b to regulate the inflow of the refrigerant into the endothermic device 14.

(Step S7)
In step S7, the CPU displays on the display unit 53 that the battery cooling priority operation that prioritizes the battery cooling operation is performed with respect to the air conditioning operation, and shifts the process to step S23.

(Step S8)
If it is not determined in step S3 that air conditioning in the vehicle interior is necessary, in step S8, the CPU performs only the battery cooling operation in the battery cooling independent mode in which only the battery cooling operation is executed without performing the air conditioning operation.
Here, in the battery cooling independent mode, the rotation speed of the compressor 21 is controlled so that the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 becomes the target heat medium temperature TWO, and the second electromagnetic valve 26b is closed. It keeps the state that it was done.

(Step S9)
In step S9, the CPU displays on the display unit 53 that the battery cooling independent operation is performed only for the battery cooling operation, and ends the operation switching control process.

(Step S10)
If it is not determined in step S2 that the battery B needs to be cooled, the CPU determines in step S10 whether or not air conditioning in the vehicle interior is required. If it is determined that air conditioning in the vehicle interior is necessary, the process is transferred to step S11, and if it is not determined that air conditioning in the vehicle interior is necessary, the process is transferred to step S13.
Here, whether or not air conditioning in the vehicle interior is required 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, and 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 vehicle interior is necessary, in step S11, the CPU performs only air conditioning operation in the air conditioning independent mode in which only air conditioning operation is performed without performing battery cooling operation.
Here, in the air conditioning independent mode, the rotation speed of the compressor 21 is controlled so that the air temperature Te detected by the cooling air temperature sensor 44 becomes the target cooling air temperature TEO, and the fifth electromagnetic valve 26e is closed. To hold.

(Step S12)
In step S12, the CPU displays on the display unit 53 that the air-conditioning independent operation is performed only for the air-conditioning operation, and shifts the processing to step S23.

(Step S13)
If it is not determined in step S10 that air conditioning in the vehicle interior is necessary, the CPU stops the air conditioning operation and the battery cooling operation in step S13, and shifts the process to step S14.
Here, the stoppage of the air conditioning operation and the battery cooling operation means that the second solenoid valve 26b is closed to regulate the inflow of the refrigerant into the heat absorber 14, and the fifth solenoid valve 26e is closed to close the heat medium heat exchanger 24. It is to regulate the inflow of the refrigerant to the air conditioner.

(Step S14)
In step S14, the CPU displays on the display unit 53 that the air conditioning operation and the battery cooling operation are stopped, and ends the operation switching control process.

(Step S15)
If it is not determined in step S1 that the battery B is being charged by rapid charging, the CPU determines in step S15 whether or not air conditioning in the vehicle interior is required. If it is determined that air conditioning in the vehicle interior is necessary, the process is transferred to step S16, and if it is not determined that air conditioning in the vehicle interior is necessary, the process is transferred to step S22.
Here, whether or not air conditioning in the vehicle interior is required 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, and the humidity detected by the inside air humidity sensor 46. Determined based on Rh.

(Step S16)
When it is determined in step S15 that air conditioning in the vehicle interior is necessary, the CPU determines in step S16 whether or not the battery B needs to be cooled. If it is determined that the battery B needs to be cooled, the process is transferred to step S17, and if it is not determined that the battery B needs to be cooled, the process is transferred to step S11.
Here, whether or not the battery B needs to be cooled is determined based on the temperature of the heat medium flowing through the heat medium circuit 30 detected by the heat medium temperature sensor 51.

(Step S17)
When it is determined in step S16 that the battery B needs to be cooled, in step S17, the CPU operates the air conditioner in the air conditioning priority mode in which the air conditioning in the vehicle interior is prioritized over the cooling of the battery B as the air conditioning priority control means. Perform battery cooling operation.
Here, in the air conditioning priority mode, the second electromagnetic valve 26b is opened, and the rotation speed of the compressor 21 is controlled so that the air temperature Te detected by the cooling air temperature sensor 44 becomes the target cooling air temperature TEO. ..
Further, 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 electromagnetic valve 26e. In the air conditioning priority mode, the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 of the fifth electromagnetic valve 26e is higher than the target heat medium temperature TWO as the target battery temperature by a predetermined temperature (for example, 5 ° C.). When the refrigerant flow passage 20j is opened at an hour (upper limit battery temperature) and the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 becomes lower than the target heat medium temperature TWO by a predetermined temperature (for example, 5 ° C.) ( The refrigerant flow passage 20j is closed at the lower limit battery temperature).

(Step S18)
In step S18, the CPU determines whether or not the air conditioning capacity in the vehicle interior is insufficient. If it is determined that the air conditioning capacity in the vehicle interior is insufficient, the process is transferred to step S19, and if it is not determined that the air conditioning capacity in the vehicle interior is insufficient, the process is transferred to step S20.
Insufficient air-conditioning capacity in the vehicle interior means that the rotation speed NC of the compressor 21 is larger than the predetermined rotation speed (for example, 4000 rpm), and the air temperature Te detected by the cooling air temperature sensor 44 is A state in which a predetermined temperature β higher than the target cooling air temperature TEO continues for a predetermined time or longer.

(Step S19)
When it is determined in step S18 that the air conditioning capacity in the vehicle interior is insufficient, the CPU stops the battery cooling operation as the battery cooling operation regulating means in step S19, and shifts the process to step S20.
Here, stopping the battery cooling operation means closing the fifth solenoid valve 26e to regulate the inflow of the refrigerant into the heat medium heat exchanger 24.

(Step S20)
In step S20, as the priority control switching means, the CPU determines whether or not the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 is less than a predetermined temperature T1 (for example, 50 ° C.). If it is determined that the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 is less than the predetermined temperature T1, the process is transferred to step S21, and the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 is changed to the temperature Tw of the heat medium. If it is not determined that the temperature is lower than the predetermined temperature T1, the process is transferred to step S4.
Here, when it is not determined that the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 is lower than the predetermined temperature T1, the battery B is in a state where the temperature Tw of the heat medium is equal to or higher than the predetermined temperature T1. Indicates that it needs to be cooled because it may deteriorate or break down.

(Step S21)
When it is determined in step S20 that the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 is less than the predetermined temperature T1, the CPU gives priority to the air conditioning operation over the battery cooling operation in step S21. The display unit 53 is displayed to indicate that the operation is being performed, and the process is transferred to step S23.

(Step S22)
If it is not determined in step S15 that air conditioning in the vehicle interior is necessary, the CPU determines in step S22 whether or not the battery B needs to be cooled. If it is determined that the battery B needs to be cooled, the process is transferred to step S8, and if it is not determined that the battery B needs to be cooled, the process is transferred to step S13.
Here, whether or not the battery B needs to be cooled is determined based on the temperature of the heat medium flowing through the heat medium circuit 30 detected by the heat medium temperature sensor 51.

(Step S23)
In step S23, the CPU determines whether or not the amount of heat dissipated in the radiator 15 is insufficient. If it is determined that the heat dissipation amount in the radiator 15 is insufficient, the process is transferred to step S24, and if it is not determined that the heat dissipation amount in the radiator 15 is insufficient, the process is transferred to step S25.
Here, the fact that the amount of heat radiated 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 a predetermined temperature α higher than the target heated air temperature TCO. The low state is a state in which it continues for a predetermined time.

(Step S24)
When it is determined in step S23 that the amount of heat radiated from the radiator 15 is insufficient, the CPU drives the air heater 16 in step S24 and ends the operation switching control process.

(Step S25)
If it is not determined in step S23 that the amount of heat radiated from the radiator 15 is insufficient, the CPU stops driving the air heater 16 in step S25 and ends the operation switching control process.

As described above, according to the vehicle air conditioner of the present embodiment, the heat detected by the heat medium temperature sensor 51 is controlled in the state where the temperature Te of the air cooled by the heat absorber 14 is controlled in the air conditioning priority mode. When the temperature Tw of the medium is a predetermined temperature T1 or higher, the temperature Tw of the heat medium cooled by the heat medium heat exchanger 24 is controlled in the battery cooling priority mode.

As a result, it is possible to suppress the state in which the battery B becomes hot, so that it is possible to reliably prevent the occurrence of a defect in the battery B.

Further, when the air supplied to the vehicle interior is cooled by the heat absorber 14 while the temperature of the heat medium cooled by the heat medium heat exchanger 24 is controlled in the battery cooling priority mode, the heat absorber 14 is used. The temperature of the cooled air is controlled by adjusting the opening degree of the flow path of the refrigerant on the upstream side of the heat absorber 14 in the refrigerant flow direction.

As a result, the air-conditioned operation can be continued even when the battery B is mainly cooled, so that it is possible to suppress a decrease in comfort in the vehicle interior.

Further, a second solenoid valve 26b for opening and closing the refrigerant flow passage 20e and a second expansion valve 25b for reducing the pressure of the refrigerant are connected to the upstream side of the heat absorber 14 in the refrigerant flow direction, and the heat absorber in the battery cooling priority mode. The temperature Te of the air cooled in No. 14 is controlled by switching the opening degree of the second solenoid valve 26b 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 opening and closing of the second solenoid valve 26b, so that the control configuration is simple and the manufacturing cost can be reduced. Become.

Further, the second electromagnetic valve 26b is higher than the upper limit air temperature higher than the target blowing temperature TAO, which is the target temperature at which the detection temperature Ti of the intake air temperature sensor 43 blows into the vehicle interior when dehumidification of the vehicle interior is not required. It is opened in some cases and closed when it is below the lower limit air temperature, which is lower than the target blowout temperature TAO.

Further, the second electromagnetic valve 26b is higher than the target cooling air temperature TEO in which the detection temperature Te of the cooling air temperature sensor 44 is the target temperature of the air cooled in the heat absorber 14 when dehumidification of the vehicle interior is required. It is opened when it is higher than the high upper limit air temperature and closed when it is lower than the lower limit air temperature lower than the target cooling air temperature TEO.

As a result, it is possible to reduce the frequency of opening / closing operation of the second solenoid valve 26b, and it is possible to prolong the life of the second solenoid valve 26b.

Further, when the temperature Tw of the heat medium to be cooled in the heat medium heat exchanger 24 is controlled in the battery cooling priority mode and the heat absorption amount of the refrigerant in the heat medium heat exchanger 24 is insufficient, the heat absorber The refrigerant flow passage 20e on the upstream side in the refrigerant flow direction of 14 is closed.

As a result, the cooling capacity for cooling the air supplied to the vehicle interior can be used as the cooling capacity for cooling the battery B, so that the battery B can be reliably cooled.

Further, when the heat medium heat exchanger 24 cools the heat medium flowing through the heat medium circuit 30 while the temperature Te of the air cooled by the heat absorber 14 is controlled in the air conditioning priority mode, the heat medium is used. The temperature Tw of the heat medium cooled in the heat exchanger 24 is controlled by adjusting the opening degree of the flow path of the refrigerant on the upstream side in the refrigerant flow direction of the heat medium heat exchanger 24.

As a result, it is possible to continue cooling the battery B even when the vehicle interior is mainly cooled, so that it is possible to suppress an increase in the temperature of the battery B.

Further, on the upstream side of the heat medium heat exchanger 24 in the refrigerant flow direction, a fifth electromagnetic valve 26e that opens and closes the refrigerant flow passage 20j and a third expansion valve 25c that reduces the pressure of the refrigerant flowing through the refrigerant flow passage 20j are provided. The temperature Tw of the heat medium connected and cooled in the heat medium heat exchanger 24 in the air conditioning priority mode is controlled by switching the opening degree of the fifth electromagnetic valve 26e between fully open and fully closed.

As a result, the temperature Tw of the heat medium cooled in the heat medium heat exchanger 24 can be controlled only by switching the opening and closing of the fifth solenoid valve 26e, so that the control configuration is simple and the manufacturing cost is reduced. It becomes possible.

Further, the fifth electromagnetic valve 26e is opened when the detection temperature Tw of the heat medium temperature sensor 51 is higher than the upper limit heat medium temperature higher than the target heat medium temperature TWO, which is the target cooling temperature of the heat medium, and is targeted. Heat medium temperature Closed when below the lower limit heat medium temperature below TWO.

As a result, it is possible to reduce the frequency of opening / closing operation of the fifth solenoid valve 26e, and it is possible to prolong the life of the fifth solenoid valve 26e.

Further, when the temperature Te of the air cooled by the heat absorber 14 is controlled in the air conditioning priority mode and the amount of heat absorbed by the refrigerant in the heat absorber 14 is insufficient, the heat medium heat exchanger 24 is upstream in the refrigerant flow direction. The refrigerant flow passage 20j on the side is closed.

As a result, the cooling capacity for cooling the battery B can be used as the cooling capacity for cooling the air supplied to the vehicle interior, so that the air supplied to the vehicle interior can be reliably cooled. It becomes.

Further, the outdoor heat exchanger 22 cools the air supplied to the vehicle interior by the heat absorber 14 while controlling the temperature Tw of the heat medium cooled in the heat medium heat exchanger 24 in the battery cooling priority mode. In this case, and when the heat medium heat exchanger 24 cools the heat medium flowing through the heat medium circuit 30 while controlling the temperature Te of the air cooled in the heat absorber 14 in the air conditioning priority mode, heat is dissipated. Make it function as a vessel.

As a result, by reliably dissipating the refrigerant in the outdoor heat exchanger 22, heat can be reliably absorbed in the heat absorber 14 and the heat medium heat exchanger 24, so that the cooling capacity of the battery B and the cooling of the vehicle interior is insufficient. Can be suppressed.

Further, the radiator 15 includes an air heater 16 that heats the air that has exchanged heat with the refrigerant.

As a result, the insufficient amount of heat radiation in the radiator 15 can be supplemented, so that the air supplied to the vehicle interior can be reliably heated to a required temperature.

Further, the switching between the adjustment of the rotation speed of the compressor 21 in the battery cooling priority mode and the adjustment of the rotation speed of the compressor 21 in the air conditioning priority mode is performed after the drive of the compressor 21 is stopped.

As a result, it is possible to suppress a sudden change in the rotation speed of the compressor 21, and it is possible to prevent the occurrence of a defect in the drive circuit of the compressor 21.

Further, the display unit 53 for notifying the passengers in the vehicle interior of information regarding the air conditioning in the vehicle interior and the cooling of the battery is provided.

As a result, it is possible to notify the passenger of the state in which the cooling effect in the vehicle interior is poor, and it is possible to prevent the passenger from making an erroneous determination that the device is out of order.

In the above embodiment, the temperature of the heat medium is equal to or higher than the predetermined temperature T1 in the state where the air supplied to the vehicle interior is cooled and the heat medium flowing through the heat medium circuit 30 is cooled in the air conditioning priority mode. In this case, the mode in which the air conditioning priority mode is switched to the battery cooling priority mode is shown. When the temperature Tw of the heat medium reaches the predetermined temperature T1, the air conditioning priority mode is switched to the battery cooling priority mode, and the air conditioning priority mode is switched to the battery cooling priority mode at different temperatures depending on the outside air temperature and the amount of solar radiation. You may.

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

Further, in the above 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 opening degree of the fifth solenoid valve 26e between fully open and fully closed. However, it is not limited to this. For example, instead of the mechanical third expansion valve 25c and the fifth electromagnetic valve 26e, an electronic expansion valve having a variable valve opening 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 valve opening degree of the electronic expansion valve.

Further, in the above-described embodiment, the operating states of the air-conditioned operation and the battery-cooled operation are displayed on the display unit 53 to notify the passenger of the operating states of the air-conditioned operation and the battery-cooled operation. Although shown, it is not limited to this. For example, the passengers may be notified of the operating states of the air conditioning operation and the battery cooling operation by voice from the 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 the refrigerant flowing through the refrigerant circuit 20.

Further, in the above embodiment, the air heating heater 16 is arranged on the downstream side of the radiator 15 in the air flow passage 11 in the refrigerant distribution direction, and the air after being heated by the radiator 15 is heated by the air heating 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 air flow passage 11 in the refrigerant flow direction, and the air before being heated in the radiator 15 may be heated by the air heater.

Further, in the above embodiment, in the battery cooling priority mode, the temperature Te of the air cooled by the heat absorber 14 is controlled by switching between fully open and fully closed of the second solenoid valve 26b. 2 It is not limited to switching between fully open and fully closed solenoid valve 26b. For example, the temperature Te of the air cooled by the endothermic valve 14 may be controlled by switching between two different types of valve openings other than the fully open and fully closed solenoid valves.

Further, in the above 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 between fully open and fully closed of the fifth solenoid valve 26e. However, the method is not limited to switching between fully open and fully closed of the fifth solenoid valve 26e. 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 types of valve openings other than the fully open and fully closed solenoid valves.

1 ... Vehicle air conditioner, 11 ... Air flow passage, 14 ... Heat absorber, 15 ... Radiator, 16 ... Air heater, 20 ... Refrigerator circuit, 21 ... Compressor, 22 ... Outdoor heat exchanger, 24 ... Heat Medium heat exchanger, 25b ... second expansion valve, 25c ... third expansion valve, 26b ... second electromagnetic valve, 26e ... fifth electromagnetic valve, 30 ... heat medium circuit, 40 ... controller, 44 ... cooling air temperature sensor, 45 ... heated air temperature sensor, 51 ... heat medium temperature sensor, 53 ... display unit, B ... battery.

Claims (16)

An air conditioner for vehicles having a battery cooling function for cooling a battery that supplies electric power to an electric motor for driving a vehicle.
A compressor that compresses the refrigerant and
An endothermic absorber that absorbs heat from the air supplied to the vehicle interior by exchanging heat between the air supplied to the vehicle interior and the refrigerant.
A battery cooling heater that absorbs the heat released from the battery,
A quick charge determination means for determining whether or not the battery is charged by quick charge,
A battery temperature sensor that detects the temperature of the battery and
A battery cooling priority control means that controls the temperature of the battery cooled by the battery cooling heater by adjusting the number of revolutions of the compressor when the quick charge determination means determines that the battery is being charged by the quick charge. ,
An air conditioning priority control means that controls the temperature of the air cooled in the heat absorber by adjusting the number of revolutions of the compressor when the quick charge determination means does not determine that the battery is being charged by the rapid charge.
When the temperature of the battery detected by the battery temperature sensor is equal to or higher than the predetermined temperature while the temperature of the air cooled in the heat absorber is controlled by the air conditioning priority control means, the battery cooling priority control means is used for battery cooling. An air conditioner for vehicles equipped with a priority control switching means for controlling the temperature of a battery cooled in a heat absorber. When the air supplied to the vehicle interior is cooled by the heat absorber while the battery temperature is controlled by the battery cooling priority control means, the temperature of the air cooled by the heat absorber is set to the refrigerant flow direction of the heat absorber. The vehicle air conditioner according to claim 1, which is controlled by adjusting the opening degree of the flow path of the refrigerant on the upstream side. A flow path on-off valve for opening and closing the refrigerant flow path and an expansion valve for reducing the pressure of the refrigerant are connected to the upstream side of the heat absorber in the refrigerant flow direction.
The air conditioner for a vehicle according to claim 2, wherein the temperature of the air cooled in the heat absorber is controlled by switching the opening degree of the flow path on-off valve between fully open and fully closed. A flow path on-off valve for opening and closing the refrigerant flow path and an expansion valve for reducing the pressure of the refrigerant are connected to the upstream side of the heat absorber in the refrigerant flow direction.
The air conditioner for a vehicle according to claim 2, wherein the temperature of the air cooled in the heat absorber is controlled by switching between two different types of opening of the flow path on-off valve. Equipped with a dehumidification determination means to determine whether dehumidification of the vehicle interior is necessary,
It is determined by the dehumidification determination means that the flow path on-off valve does not need to be dehumidified in the vehicle interior, and the temperature of the air before being cooled by the heat absorber is higher than the target outlet temperature, which is the target temperature of the air blown into the vehicle interior. The vehicle air conditioner according to claim 3 or 4, which is opened when the upper limit air temperature is higher than the high upper limit air temperature and closed when the lower limit air temperature is lower than the target blowout temperature. Equipped with a dehumidification determination means to determine whether dehumidification of the vehicle interior is necessary,
It is determined by the dehumidification determination means that the flow path on-off valve needs to be dehumidified in the vehicle interior, and the temperature of the air after heat exchange with the refrigerant in the heat absorber is the target temperature of the air cooled in the heat absorber. The air conditioner for a vehicle according to claim 3 or 4, which is opened when the upper limit air temperature is higher than the target cooling air temperature and closed when the lower limit air temperature is lower than the target cooling air temperature. Air conditioning that closes the flow path of the refrigerant on the upstream side of the heat absorber in the refrigerant flow direction when the amount of heat absorbed by the refrigerant in the heat absorber for cooling the battery is insufficient while the temperature of the battery is controlled by the battery cooling priority control means. The vehicle air conditioner according to any one of claims 2 to 6, further comprising a driving control means. When the battery is cooled by the battery cooling heat absorber while the temperature of the air cooled in the heat absorber is controlled by the air conditioning priority control means, the temperature of the battery cooled by the battery cooling heat absorber is determined. The vehicle air conditioner according to claim 1, which is controlled by adjusting the opening degree of the flow path of the refrigerant on the upstream side of the heat absorber for cooling the battery in the refrigerant flow direction. A flow path on-off valve for opening and closing the refrigerant flow path and an expansion valve for reducing the pressure of the refrigerant are connected to the upstream side of the battery cooling heater in the refrigerant flow direction.
The vehicle air conditioner according to claim 8, wherein the temperature of the battery cooled in the battery cooling heater is controlled by switching the opening degree of the flow path on-off valve between fully open and fully closed. A flow path on-off valve for opening and closing the refrigerant flow path and an expansion valve for reducing the pressure of the refrigerant are connected to the upstream side of the battery cooling heater in the refrigerant flow direction.
The vehicle air conditioner according to claim 8, wherein the temperature of the battery cooled in the battery cooling heater is controlled by switching between two types of opening and closing valves that are different from each other. The flow path on-off valve is opened when the detection temperature of the battery temperature sensor is higher than the upper limit battery temperature, which is higher than the target battery temperature, which is the target cooling temperature of the battery, and is higher than the lower limit battery temperature, which is lower than the target battery temperature. The vehicle air conditioner according to claim 9 or 10, which is closed when it is low. When the temperature of the air cooled in the heat absorber is controlled by the air conditioning priority control means and the amount of heat absorbed by the refrigerant in the heat absorber is insufficient, the flow of the refrigerant on the upstream side of the heat absorber for battery cooling in the refrigerant flow direction. The vehicle air conditioner according to any one of claims 8 to 11, further comprising a battery cooling operation controlling means for closing the road. Equipped with an outdoor heat exchanger that exchanges heat between the air outside the vehicle and the refrigerant.
When the outdoor heat exchanger cools the air supplied to the vehicle interior by the heater while the temperature of the battery cooled in the battery cooling absorber is controlled by the battery cooling priority control means, and the air conditioning is prioritized. The vehicle according to any one of claims 1 to 12, wherein the vehicle functions as a radiator when the battery is cooled by the battery cooling heater while the temperature of the air cooled in the heat absorber is controlled by the control means. Air conditioner for. A radiator that heats the air supplied to the passenger compartment and
The vehicle air conditioner according to any one of claims 1 to 13, further comprising an air heater for heating air flowing on the upstream side or the downstream side in the air flow direction of the radiator. The switching between the adjustment of the compressor rotation speed by the battery cooling priority control means and the adjustment of the compressor rotation speed by the air conditioning priority control means is performed according to any one of claims 1 to 14 after the compressor drive is stopped. The described vehicle air conditioner. The vehicle air conditioner according to any one of claims 1 to 15, further comprising a notification means for notifying passengers in the vehicle interior of information regarding air conditioning in the vehicle interior and cooling of a battery.

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