JP2020001609A - Vehicle air conditioner - Google Patents

Abstract

To provide a vehicle air conditioner which can prevent occurrence of failure of a battery caused by high temperature of the battery.SOLUTION: A temperature Tw of a heat medium which is cooled by a heat medium heat exchanger 24 is controlled in a battery cooling priority mode in a case that the temperature Tw of the heat medium detected by a heat medium temperature sensor is a predetermined temperature T1 or higher in a state that a temperature Te of air which is cooled by a heat sink 14 is controlled in an air conditioning priority mode. The action can inhibit a state that a battery B is heated to a high temperature and thus can prevent occurrence of failure of the battery B reliably.SELECTED DRAWING: Figure 1

Description

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

  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 that has exchanged heat with a refrigerant in the indoor heat exchanger to the vehicle interior. By doing so, cooling, heating, dehumidification, and the like in the vehicle interior are performed.

  Further, as a vehicle on which the vehicle air conditioner is mounted, there is a vehicle such as an electric vehicle or a hybrid vehicle provided with a running battery for supplying electric power to an electric motor as a driving source. When the vehicle continues traveling or performs rapid charging, the traveling battery may be heated to a high temperature by releasing heat.

  For this reason, in the vehicle, in order to cool the running battery, a running battery is connected to a cooling water circuit, and a cooling water circuit is connected to a refrigerant circuit via a 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 cooled the traveling battery and absorbed heat is radiated by exchanging heat with the refrigerant flowing through the refrigerant circuit. ing.

JP 2018-43741 A

  In the vehicle air conditioner, when simultaneous cooling of the vehicle interior and cooling of the traveling battery are performed, if the respective loads increase, the cooling capacity may be insufficient.

  In view of the above, the vehicle air conditioner performs a cooling priority operation for controlling the number of revolutions of the compressor in accordance with the cooling load in the vehicle compartment during traveling of the vehicle, and performs cooling of the battery during rapid charging of the traveling battery. The battery cooling priority operation for controlling the rotation speed of the compressor according to the load is performed.

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

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

  In order to achieve the above object, the vehicle air conditioner of the present invention is a vehicle air conditioner having a battery cooling function of cooling a battery that supplies power to an electric motor for running a vehicle, and compresses refrigerant. A compressor, a heat absorber that absorbs heat from air supplied to the vehicle interior by exchanging heat with air and a refrigerant supplied to the vehicle interior, and a battery cooling heat absorber that absorbs heat released from the battery. A quick charge determining means for determining whether or not the battery is being charged by the quick charge; a battery temperature sensor for detecting the temperature of the battery; and a battery when the quick charge determining means determines that the battery is charged by the quick charge. Battery cooling priority control means for controlling the temperature of the battery cooled by the battery cooling heat absorber by adjusting the rotation speed of the compressor; Air conditioning priority control means for controlling the temperature of air cooled in the heat absorber by adjusting the number of revolutions of the compressor when the determination means does not determine that the battery is being charged by rapid charging; In a state where the temperature of the air cooled in the heat absorber is controlled by the means, if the temperature of the battery detected by the battery temperature sensor is equal to or higher than a predetermined temperature, the battery cooling priority control means controls the battery cooling heat absorber. Priority control switching means for controlling the temperature of the battery to be cooled.

  Thus, when the battery is being charged by rapid charging, priority is given to cooling of the battery, and when the battery is not being rapidly charged, priority is given to cooling and dehumidification in the cabin, and when the battery is not being rapidly charged. Even when the temperature of the battery is equal to or higher than the predetermined temperature, the cooling of the battery is performed with priority, so that the state in which the temperature of the battery becomes high is suppressed.

  According to the present invention, the state in which the temperature of the battery becomes high can be suppressed, so that it is possible to reliably prevent the occurrence of a battery malfunction.

It is a schematic structure figure of the air conditioner for vehicles showing one embodiment of the present invention. It is a block diagram showing a control system. It is a flowchart which shows operation switching control processing. It is a flowchart which shows operation switching control processing.

  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 includes a traveling electric motor and a traveling battery B in which electric power supplied to the electric motor is stored.

  The battery B emits heat when supplying power to the electric motor or charging the electric motor when the vehicle is running. The battery B can perform quick 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 radiation particularly increases during the rapid charging. For example, the battery B is desirably used at a temperature in the range of 10 ° C. to 30 ° C. When the temperature becomes 50 ° C. or higher, the deterioration is accelerated. For this reason, it is necessary to cool the battery B as necessary and maintain it below a predetermined temperature 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 the battery B, an air conditioning unit 10 provided in the vehicle interior of the vehicle, a refrigerant circuit 20 provided in the vehicle interior and outside the vehicle interior. A heat medium circuit 30 for flowing a heat medium.

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

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

  At one end of the air flow passage 11, there is provided 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. The suction port switching damper 13 includes 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 between the inside air inlet 11b and the inside air inlet 11b, it is possible to switch between the inside and outside air suction mode in which the outside air inlet 11a and the inside air inlet 11b are opened.

  A heat absorber 14 for cooling and dehumidifying the air flowing through the air flow passage 11 is provided downstream of the indoor blower 12 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 downstream of the heat absorber 14 in the air flow passage 11 in the air flow direction.

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

  An air mix damper 17 is provided between the heat absorber 14 and the heat radiator 15 in the air flow passage 11 to adjust a ratio of air heated by the heat radiator 15 in the air passing through the heat absorber 14. ing. The air mix damper 17 closes one of the radiator bypass flow passage 11c and the radiator 15 in the air flow direction upstream 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, and the opening of the radiator 15 on the upstream side in the air flow direction is adjusted. The air mix damper 17 has an opening of 0% when the air flow passage 11 closes the upstream side of the radiator 15 in the air flow direction and opens the radiator bypass flow passage 11c. The opening degree becomes 100% in a state in which 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, a compressor 21 for compressing the refrigerant, an outdoor heat exchanger 22 for exchanging heat between the refrigerant and the 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 a battery cooling endotherm for exchanging heat between the refrigerant flowing through the refrigerant circuit 20 and the heat medium flowing through the heat medium circuit 30. Medium heat exchanger 24 as a heat exchanger, electronic first expansion valve 25a whose valve opening can be adjusted between fully closed and fully opened, heat absorber 14 and refrigerant at the outlet of heat medium heat exchanger 24. Mechanical second and third expansion valves 25b and 25c whose valve openings are adjusted according to temperature changes, first to fifth solenoid valves 26a and 26b as flow path opening / closing valves for opening and closing a flow path of a refrigerant. 26b, 26c, 26d, 26e, the cooling A check valve 27 for restricting the flow direction of the refrigerant, and an accumulator 28 for separating the gaseous refrigerant and the liquid refrigerant to prevent the liquid refrigerant from being sucked into the compressor 21. They are connected by aluminum or copper tubes. As the refrigerant flowing through the refrigerant circuit 20, for example, R-134a or the like is used.

  The outdoor heat exchanger 22 is disposed outside the vehicle compartment, such as an engine room, such that the flow direction of the air that exchanges heat with the refrigerant is in 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 compartment in the front-rear direction when the vehicle stops is provided. The outdoor heat exchanger 22 includes a main body 22a for radiating or absorbing the refrigerant, a receiver 22b for allowing the radiated refrigerant to flow and separating the gaseous refrigerant from the liquid refrigerant, and a receiver 22b. And a supercooling section 22c for making the liquid refrigerant flowing out of the supercooling state.

  The configuration of the refrigerant circuit 20 will be specifically described. A refrigerant flow passage 20a is formed on the refrigerant discharge side of the compressor 21 by connecting the refrigerant inflow side of the radiator 15. The refrigerant outflow side of the radiator 15 is connected to the refrigerant inflow side of the outdoor heat exchanger 22 to form a refrigerant flow passage 20b. A first expansion valve 25a is provided in the refrigerant flow passage 20b. A refrigerant flow passage 20c is formed on the refrigerant outflow side of the main body 22a in the outdoor heat exchanger 22 by connecting the refrigerant inflow side of the receiver 22b. A first solenoid valve 26a is provided in the refrigerant flow passage 20c. Further, the refrigerant inflow side of the supercooling 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 on the refrigerant outflow side of the supercooling section 22c by connecting the high-pressure refrigerant inflow side of the internal heat exchanger 23. The refrigerant flow passage 20e is formed on the high-pressure refrigerant outflow side of the internal heat exchanger 23 by connecting the refrigerant inflow side of the heat absorber 14. In the refrigerant flow passage 20e, a check valve 27, a second solenoid valve 26b, and a second expansion valve 25b are provided in this order from the internal heat exchanger 23 side. A refrigerant flow passage 20f is formed on the refrigerant outflow side of the heat absorber 14 by connecting the low pressure refrigerant inflow side of the internal heat exchanger 23. A refrigerant flow passage 20g is formed on the low pressure refrigerant outflow side of the internal heat exchanger 23 by connecting the refrigerant suction side of the compressor 21. An accumulator 28 is provided in the refrigerant flow passage 20g. In addition, between the radiator 15 and the first expansion valve 25a in the refrigerant flow passage 20b, the outdoor heat exchanger 22 is bypassed, and the space between the check valve 27 and the second solenoid valve 26b in the refrigerant flow passage 20e is provided. The connection forms a refrigerant flow passage 20h. A third solenoid valve 26c is provided in the refrigerant flow passage 20h. By connecting between the internal heat exchanger 23 and the accumulator 28 in the refrigerant flow passage 20g, between the main body portion 22a of the outdoor heat exchanger 22 and the first solenoid valve 26a in the refrigerant flow passage 20c, the refrigerant flow A path 20i is formed. A fourth solenoid valve 26d is provided in the refrigerant flow passage 20i. A refrigerant flow passage 20j is formed between the check valve 27 and the second solenoid valve 26b in the refrigerant flow passage 20e by connecting the refrigerant inflow side of the heat medium heat exchanger 24. In the refrigerant flow passage 20j, a fifth solenoid valve 26e and a third expansion valve 25c are provided in order from the refrigerant flow passage 20e side. 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, for example, an aluminum tube or a copper tube. As the heat medium flowing through the heat medium circuit 30, for example, an antifreeze such as ethylene glycol is used.

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

  Further, the vehicle air conditioner 1 includes a controller 40 for controlling the temperature and humidity in the vehicle cabin to the set temperature and humidity, and performing control for cooling the battery B to a predetermined temperature or lower. I have.

  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 the program stored in the ROM based on the input signal, and stores a state detected by the input signal in the RAM. And transmitting an output signal to a device connected to the output side.

  On the input side of the controller 40, as shown in FIG. 2, the compressor 21, an outside air temperature sensor 41 for detecting the temperature Tam outside the vehicle compartment, an inside air temperature sensor 42 for detecting the temperature Tr inside the vehicle 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 cooled in the heat absorber 14, and heated in the radiator 15. The heated air temperature sensor 45 for detecting the temperature Tc of the air after the temperature, 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. Temperature sensor 47 for detecting the temperature, a solar sensor 48 of a photo sensor type for detecting the amount of solar radiation Ts, a speed sensor 49 for detecting the speed V of the vehicle, A pressure sensor 50 for detecting the pressure Pd on the high pressure side of the circuit 20, 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 A setting operation unit 52 and a battery B for setting the temperature Tset in the vehicle compartment by the occupant and setting the switching of the air-conditioning operation content are connected.

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

  In the vehicle air conditioner 1 configured as described above, the temperature and humidity of the air in the vehicle compartment are adjusted using the air conditioning unit 10 and the refrigerant circuit 20. Specifically, the air conditioner 1 for a vehicle includes a cooling operation for lowering the temperature in the vehicle compartment, a dehumidifying cooling operation for lowering the temperature and decreasing the humidity in the vehicle interior, and a heating operation for increasing the temperature in the vehicle interior. And a dehumidifying and heating operation for lowering the humidity in the passenger compartment and increasing the temperature.

  The vehicle air conditioner 1 performs a battery cooling operation of cooling the battery B using the refrigerant circuit 20 and the heat medium circuit 30.

  For example, when performing the battery cooling operation simultaneously with the cooling operation, in the air conditioning unit 10, the indoor blower 12 is driven and the air mix damper 17 is set to 0%. 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.

  Thereby, in the refrigerant circuit 20, the refrigerant discharged from the compressor 21 is supplied to the refrigerant flow passage 20a, the radiator 15, the refrigerant flow passage 20b, and the main body of the outdoor heat exchanger 22, as indicated by solid arrows in FIG. The part 22a, the refrigerant flow path 20c, the receiver part 22b, the supercooling part 22c, the refrigerant flow path 20d, the high pressure side of the internal heat exchanger 23, and the refrigerant flow path 20e flow in this order. 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 that order, and is sucked into the compressor 21. The other refrigerant flowing through the refrigerant flow passage 22e flows through the refrigerant flow passage 20j, the heat medium heat exchanger 24, and the refrigerant flow passages 20k, 20g in this order, and is sucked into the compressor 21.

  Further, in the heat medium circuit 30, the heat medium discharged from the heat medium pump 31 includes a heat medium flow passage 30a, a heat medium heat exchanger 24, a heat medium flow passage 30b, The battery B flows in the order of the heat medium flow passage 30c and is sucked into the heat medium pump 31.

  Since the degree of 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 absorbs heat in the heat absorber 14.

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

  The heat medium flowing through the heat medium circuit 30 is cooled by exchanging heat with the refrigerant absorbing heat 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, for example, in the dehumidifying cooling operation in which the temperature and humidity in the vehicle interior are reduced, the opening degree of the air mix damper 17 of the air conditioning unit 10 in the refrigerant flow path of the refrigerant circuit 20 during the cooling operation is set to be larger than 0%. Set every time.

  Thus, 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 flow passage 11 is dehumidified and cooled by exchanging heat with the refrigerant absorbing heat in the heat absorber 14, is heated to the target outlet temperature TAO in the radiator 15, and is blown into the vehicle interior.

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

  Thus, 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 refrigerant absorbing heat in the heat absorber 14, and is heated to the target blow temperature TAO and blown out in the radiator 15.

  Here, when the refrigerant absorbs heat in the heat absorber 14 and the heat medium heat exchanger 24 at the same time, such as when performing the battery cooling operation simultaneously with the cooling operation or the dehumidifying cooling operation, the heat absorbed by the refrigerant is reliably released. The outdoor heat exchanger 22 functions as a radiator.

  Further, the controller 40 performs an operation switching control process 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 flowcharts of FIGS.

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

(Step S2)
If it is determined in step S1 that the battery B is being charged by quick charging, the CPU determines in step S2 whether cooling of the battery B is necessary. If it is determined that cooling of battery B is necessary, the process proceeds to step S3. If it is not determined that cooling of battery B is necessary, the process proceeds 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 cooling of the battery B is necessary, in step S3, the CPU determines whether or not air conditioning in the vehicle compartment such as a cooling operation or a dehumidifying cooling operation is required. If it is determined that air conditioning in the vehicle compartment is necessary, the process proceeds to step S4, and if it is not determined that air conditioning in the vehicle compartment is necessary, the process proceeds to step S8.
Here, whether the air conditioning in the vehicle compartment is necessary depends on the difference between the set temperature Tset set by the occupant and the temperature Tr detected by the inside air temperature sensor 42, and the humidity detected by the inside air humidity sensor 46. It is determined based on Rh.

(Step S4)
If it is determined in step S3 that air conditioning in the vehicle compartment is necessary, in step S4, the CPU operates as a battery cooling priority control unit in a battery cooling priority mode in which cooling of the battery B is prioritized over air conditioning in the vehicle compartment. Perform operation and battery cooling operation.
Here, in the battery cooling priority mode, the fifth solenoid valve 26e is opened, and the rotation speed of the compressor 21 is controlled such that the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 becomes the target heat medium temperature TWO. I do.
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 it is necessary to dehumidify the vehicle interior as a dehumidification determining unit. The opening / closing operation of the second solenoid valve 26b is controlled based on the temperature Ti of the air flowing into the air flow passage 11 that has flowed. The second solenoid 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 it is not necessary to dehumidify the vehicle interior. When the temperature Ti detected by the intake air temperature sensor 43 becomes lower than the lower limit (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 in the vehicle compartment is necessary as a dehumidification determining means. The opening / closing operation of the second solenoid valve 26b is controlled based on the detected air Te. When it is determined that dehumidification of the vehicle interior is required, the second electromagnetic valve 26b sets the target cooling air temperature at which the temperature Te detected by the cooling air temperature sensor 44 is the target temperature of the air to be cooled in the heat absorber. When the predetermined temperature γ2 becomes higher than TEO, the refrigerant flow passage 20e is opened, and when the temperature Te detected by the cooling air temperature sensor 44 becomes equal to or lower than a lower limit value (for example, 2 ° C.) lower than the target cooling air temperature TEO. The flow passage 20e is closed.
The determination as to whether or not dehumidification of the vehicle compartment is necessary is made based on an input to the setting operation unit 52 for switching between execution of dehumidification and cancellation of execution.

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

(Step S6)
If it is determined in step S5 that the cooling capacity of the battery B is insufficient, in step S6, the CPU stops the air-conditioning operation as an air-conditioning operation restricting unit, and proceeds to step S7.
Here, stopping the air-conditioning operation means closing the second solenoid valve 26b to restrict the refrigerant from flowing into the heat absorber 14.

(Step S7)
In step S7, the CPU displays on the display unit 53 a message indicating that the battery cooling operation is prioritizing the battery cooling operation with respect to the air conditioning operation, and proceeds to step S23.

(Step S8)
If it is not determined in step S3 that air conditioning in the vehicle compartment is necessary, in step S8, the CPU performs only the battery cooling operation in the battery cooling only mode in which only the battery cooling operation is performed without performing the air conditioning operation.
Here, in the battery cooling only mode, the rotation speed of the compressor 21 is controlled such 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 solenoid valve 26b is closed. Keep the state.

(Step S9)
In step S9, the CPU displays on the display unit 53 a message indicating that the battery cooling only operation in which only the battery cooling operation is performed is performed, and ends the operation switching control process.

(Step S10)
If it is not determined in step S2 that cooling of the battery B is necessary, the CPU determines in step S10 whether air conditioning in the vehicle compartment is necessary. If it is determined that air conditioning in the vehicle compartment is necessary, the process proceeds to step S11. If it is not determined that air conditioning in the vehicle compartment is necessary, the process proceeds to step S13.
Here, whether the air conditioning in the vehicle compartment is necessary depends on the difference between the set temperature Tset set by the occupant and the temperature Tr detected by the inside air temperature sensor 42, and the humidity detected by the inside air humidity sensor 46. It is determined based on Rh.

(Step S11)
If it is determined in step S10 that air conditioning in the vehicle compartment is necessary, in step S11, the CPU performs only the air conditioning operation in the air conditioning only mode in which only the air conditioning operation is performed without performing the battery cooling operation.
Here, in the air-conditioning only mode, the rotation speed of the compressor 21 is controlled so that the temperature Te of the air detected by the cooling air temperature sensor 44 becomes the target cooling air temperature TEO, and the fifth solenoid valve 26e is closed. Hold.

(Step S12)
In step S12, the CPU displays on the display unit 53 a message indicating that only the air conditioning operation in which only the air conditioning operation is being performed is performed, and proceeds to step S23.

(Step S13)
If it is not determined in step S10 that air conditioning in the vehicle compartment is necessary, the CPU stops the air conditioning operation and the battery cooling operation in step S13, and moves the process to step S14.
Here, the stopping of the air-conditioning operation and the battery cooling operation means that the second electromagnetic valve 26b is closed to restrict the refrigerant from flowing into the heat absorber 14, and the fifth electromagnetic valve 26e is closed to close the heat medium heat exchanger 24. Is to regulate the inflow of the refrigerant to the

(Step S14)
In step S14, the CPU displays on the display unit 53 that the air conditioning operation and the battery cooling operation have been 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 quick charging, the CPU determines in step S15 whether air conditioning in the vehicle compartment is necessary. If it is determined that air conditioning in the vehicle compartment is necessary, the process proceeds to step S16. If it is not determined that air conditioning in the vehicle compartment is necessary, the process proceeds to step S22.
Here, whether the air conditioning in the vehicle compartment is necessary depends on the difference between the set temperature Tset set by the occupant and the temperature Tr detected by the inside air temperature sensor 42, and the humidity detected by the inside air humidity sensor 46. It is determined based on Rh.

(Step S16)
If it is determined in step S15 that air conditioning in the vehicle compartment is necessary, the CPU determines in step S16 whether cooling of the battery B is necessary. If it is determined that cooling of battery B is necessary, the process proceeds to step S17. If it is not determined that cooling of battery B is necessary, the process proceeds 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)
If it is determined in step S16 that the cooling of the battery B is necessary, in step S17, the CPU performs the air conditioning operation as an air conditioning priority control unit in the air conditioning priority mode in which the air conditioning in the vehicle compartment is prioritized over the cooling of the battery B. Perform battery cooling operation.
Here, in the air conditioning priority mode, the second solenoid valve 26b is opened, and the rotation speed of the compressor 21 is controlled such that the temperature Te of the air detected by the cooling air temperature sensor 44 becomes the target cooling air temperature TEO. .
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. In the air-conditioning priority mode, in the fifth solenoid valve 26e, the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 has become higher by a predetermined temperature (for example, 5 ° C.) than the target heat medium temperature TWO as the target battery temperature. At this time (upper limit battery temperature), the refrigerant flow passage 20j is opened, 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 the air conditioning capacity in the vehicle compartment is insufficient. If it is determined that the air conditioning capacity in the vehicle compartment is insufficient, the process proceeds to step S19. If it is not determined that the air conditioning capability in the vehicle interior is insufficient, the process proceeds to step S20.
Insufficient air conditioning capacity in the vehicle compartment means that the rotational speed NC of the compressor 21 is higher than a predetermined rotational speed (for example, 4000 rpm) and the temperature Te of the air detected by the cooling air temperature sensor 44 is The state in which the temperature is higher than the target cooling air temperature TEO by the predetermined temperature β continues for a predetermined time or more.

(Step S19)
If it is determined in step S18 that the capacity of the air conditioning in the vehicle compartment is insufficient, in step S19, the CPU stops the battery cooling operation as the battery cooling operation restricting means, and shifts the processing 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, the CPU determines whether the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 is lower than a predetermined temperature T1 (for example, 50 ° C.) as a priority control switching unit. If it is 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 process proceeds to step S21, where the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 is determined. If it is not determined that the temperature is lower than the predetermined temperature T1, the process proceeds to step S4.
Here, the case where the temperature Tw of the heat medium detected by the heat medium temperature sensor 51 is not determined to be lower than the predetermined temperature T1 means that the temperature Tw of the heat medium is equal to or higher than the predetermined temperature T1 and the battery B This indicates that the device needs to be cooled because the device may deteriorate or fail.

(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 lower than the predetermined temperature T1, in step S21, the CPU gives priority to air conditioning operation over battery cooling operation. An indication that driving is being performed is displayed on the display unit 53, and the process proceeds to step S23.

(Step S22)
If it is not determined in step S15 that air conditioning in the vehicle compartment is necessary, the CPU determines in step S22 whether cooling of the battery B is necessary. If it is determined that cooling of battery B is necessary, the process proceeds to step S8. If it is not determined that cooling of battery B is necessary, the process proceeds 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 the heat radiation amount in the radiator 15 is insufficient. If it is determined that the amount of heat radiation in the radiator 15 is insufficient, the process proceeds to step S24. If it is not determined that the amount of heat radiation in the radiator 15 is insufficient, the process proceeds to step S25.
Here, the insufficient heat radiation amount in the radiator 15 means that the temperature Tc of the air 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 that continues for a predetermined time.

(Step S24)
If it is determined in step S23 that the heat radiation amount in 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 heat radiation amount in 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, in a state where the temperature Te of the air cooled by the heat absorber 14 is controlled in the air conditioning priority mode, the heat detected by the heat medium temperature sensor 51 is controlled. When the temperature Tw of the medium is equal to or higher than the predetermined temperature T1, the temperature Tw of the heat medium cooled by the heat medium heat exchanger 24 in the battery cooling priority mode is controlled.

  Thereby, the state in which the temperature of the battery B becomes high can be suppressed, so that it is possible to reliably prevent the occurrence of a failure of the battery B.

  When the air supplied to the vehicle interior is cooled by the heat absorber 14 in a state where the temperature of the heat medium cooled in the heat medium heat exchanger 24 is controlled in the battery cooling priority mode, the heat absorber 14 The temperature of the air to be cooled is controlled by adjusting the opening degree of the refrigerant flow path upstream of the heat absorber 14 in the refrigerant flow direction.

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

  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 upstream of the heat absorber 14 in the refrigerant flow direction, and the heat absorber in the battery cooling priority mode is connected. The temperature Te of the air cooled at 14 is controlled by switching the opening degree of the second solenoid valve 26b between fully open and fully closed.

  Thus, 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 a simple control configuration is achieved, and the manufacturing cost can be reduced. Become.

  Further, the second solenoid valve 26b is higher than the upper limit air temperature at which the detected temperature Ti of the intake air temperature sensor 43 is higher than the target outlet temperature TAO which is the target temperature to be blown into the passenger compartment when the dehumidification of the passenger compartment is not necessary. It is opened when the temperature is lower than the lower limit air temperature lower than the target outlet temperature TAO.

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

  This makes it possible to reduce the frequency of occurrence of the opening / closing operation of the second solenoid valve 26b and prolong the life of the second solenoid valve 26b.

  If the amount of heat absorbed by the refrigerant in the heat medium heat exchanger 24 is insufficient while controlling the temperature Tw of the heat medium cooled in the heat medium heat exchanger 24 in the battery cooling priority mode, the heat absorber The refrigerant flow passage 20e on the upstream side of the refrigerant flow direction 14 is closed.

  Thus, the cooling capacity for cooling the air supplied into the vehicle compartment can be used as the cooling capacity for cooling the battery B, so that the battery B can be reliably cooled.

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

  Thus, the cooling of the battery B can be continued even in a state where the cooling of the vehicle interior is mainly performed, so that an increase in the temperature of the battery B can be suppressed.

  On the upstream side of the heat medium heat exchanger 24 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 flowing through the refrigerant flow passage 20j are provided. The temperature Tw of the heat medium that is connected and cooled in the heat medium heat exchanger 24 in the air conditioning priority mode is controlled by switching the degree of opening of the fifth solenoid valve 26e between fully open and fully closed.

  Thus, the temperature Tw of the heat medium to be 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 a simple control configuration is achieved and the manufacturing cost is reduced. It becomes possible.

  The fifth solenoid valve 26e is opened when the detected temperature Tw of the heat medium temperature sensor 51 is higher than an upper limit heat medium temperature higher than a target heat medium temperature TWO which is a target cooling temperature of the heat medium. It is closed when the temperature is lower than the lower limit heat medium temperature lower than the heat medium temperature TWO.

  This makes it possible to reduce the frequency of occurrence of the opening / closing operation of the fifth solenoid valve 26e and prolong the life of the fifth solenoid valve 26e.

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

  This makes it possible to use the cooling capacity for cooling the battery B 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 into 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 the case where the heat medium flowing through the heat medium circuit 30 is cooled by the heat medium heat exchanger 24 while controlling the temperature Te of the air cooled in the heat absorber 14 in the air conditioning priority mode, Function as a container.

  Thereby, since the heat is reliably absorbed in the heat absorber 14 and the heat medium heat exchanger 24 by reliably dissipating the refrigerant in the outdoor heat exchanger 22, the cooling capacity of the battery B and the cooling in the vehicle compartment is insufficient. Can be suppressed.

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

  This makes it possible to make up for the insufficient amount of heat radiation in the radiator 15, so that it is possible to reliably heat the air supplied into the vehicle compartment to a required temperature.

  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 driving of the compressor 21 is stopped.

  Thus, a sudden change in the rotation speed of the compressor 21 can be suppressed, so that it is possible to prevent a failure in the drive circuit of the compressor 21 from occurring.

  In addition, the display unit 53 includes a display unit 53 that informs a passenger in the vehicle compartment of information regarding air conditioning in the vehicle compartment and cooling of the battery.

  This allows the passenger to be notified of the state in which the air conditioner in the vehicle compartment is ineffective, so that it is possible to prevent the passenger from erroneously determining that the device is out of order.

  In the above-described embodiment, in the air-conditioning priority mode, while cooling the air supplied into the passenger compartment and cooling the heat medium flowing through the heat medium circuit 30, the temperature of the heat medium is equal to or higher than the predetermined temperature T1. In this case, the air conditioning priority mode is switched to the battery cooling priority mode. When the temperature Tw of the heat medium becomes the predetermined temperature T1, in addition to switching from the air conditioning priority mode to the battery cooling priority mode, switching from the air conditioning priority mode to the battery cooling priority mode at different temperatures according to the outside air temperature and the amount of solar radiation. You may.

  In the 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 solenoid valve provided on the upstream side of the mechanical second expansion valve 25b in the refrigerant flow direction. Although the operation performed by switching the opening degree of the opening 26b between full open and full close has been described, the present invention 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 having a variable valve opening is provided upstream of the heat absorber 14 in the refrigerant flow direction. 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 control of the temperature Tw of the heat medium cooled by the heat medium heat exchanger 24 is performed by switching the degree of opening of the fifth solenoid valve 26e between fully open and fully closed. However, the present invention is not limited to this. For example, instead of the mechanical third expansion valve 25c and the fifth solenoid valve 26e, an electronic expansion valve having a variable valve opening is provided upstream 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 of the electronic expansion valve.

  Further, in the above-described embodiment, the respective operating states of the air-conditioning operation and the battery cooling operation are displayed on the display unit 53, thereby notifying the occupant of the respective operating states of the air-conditioning operation and the battery cooling operation. Although shown, it is not limited to this. For example, the respective operating states of the air-conditioning operation and the battery cooling operation may be notified to the occupant by voice from a speaker.

  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 heater 16 is arranged downstream of the radiator 15 in the refrigerant flow direction in the air flow passage 11, and the air heated in the radiator 15 is heated by the air heater 16. However, the present invention 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 flow passage 11 so that the air before being heated in the radiator 15 is heated by the air heater.

  Further, 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 switching the second solenoid valve 26b between fully open and fully closed. It is not limited to switching between the fully opened and fully closed two electromagnetic 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 openings other than the full opening and the full closing of the solenoid valve.

  In the above-described embodiment, the control of the temperature Tw of the heat medium cooled by the heat medium heat exchanger 24 in the air-conditioning priority mode is performed by switching the fifth solenoid valve 26e between fully open and fully closed. However, the present invention is not limited to switching between the fully opened and fully closed fifth electromagnetic valves 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 valve openings other than the full opening and the full closing of the solenoid valve.

  DESCRIPTION OF SYMBOLS 1 ... Air conditioner for vehicles, 11 ... Air flow path, 14 ... Heat sink, 15 ... Heat radiator, 16 ... Air heater, 20 ... Refrigerant circuit, 21 ... Compressor, 22 ... Outdoor heat exchanger, 24 ... Heat Medium heat exchanger, 25b: second expansion valve, 25c: third expansion valve, 26b: second solenoid valve, 26e: fifth solenoid 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 a vehicle having a battery cooling function of cooling a battery that supplies power to an electric motor for driving a vehicle,
A compressor for compressing the refrigerant,
A heat 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 heat absorber that absorbs heat released from the battery;
Quick charge determination means for determining whether or not the battery is being charged by quick charge;
A battery temperature sensor for detecting a battery temperature;
Battery cooling priority control means for controlling the temperature of the battery cooled by the battery cooling heat absorber by adjusting the rotation speed of the compressor when the quick charge determination means determines that the battery is being charged by the quick charge; ,
Air-conditioning priority control means for controlling the temperature of the air cooled in the heat absorber by adjusting the rotation speed of the compressor when the quick charge determination means does not determine that the battery is being charged by the quick charge;
When the temperature of the air cooled by the heat absorber is controlled by the air-conditioning priority control means, and the temperature of the battery detected by the battery temperature sensor is equal to or higher than a predetermined temperature, the battery cooling priority control means controls the battery cooling. Priority control switching means for controlling the temperature of the battery cooled in the heat absorber. When the air supplied to the vehicle interior is cooled by the heat absorber while the temperature of the battery is controlled by the battery cooling priority control means, the temperature of the air cooled in the heat absorber is determined by the refrigerant flow direction of the heat absorber. The vehicle air conditioner according to claim 1, wherein the control is performed by adjusting an opening degree of a refrigerant flow path on an upstream side. On the upstream side in the refrigerant flow direction of the heat absorber, a flow path opening / closing valve for opening / closing the refrigerant flow passage and an expansion valve for reducing the pressure of the refrigerant are connected,
The vehicle air conditioner 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 full opening and full closing. On the upstream side in the refrigerant flow direction of the heat absorber, a flow path opening / closing valve for opening / closing the refrigerant flow passage and an expansion valve for reducing the pressure of the refrigerant are connected,
The vehicle air conditioner according to claim 2, wherein the temperature of the air cooled in the heat absorber is controlled by switching between two different opening degrees of the flow path on-off valve. Dehumidification determination means for determining whether dehumidification of the vehicle interior is necessary,
The flow path on-off valve is determined by the dehumidification determining means to be unnecessary to dehumidify the interior of the vehicle, 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 interior of the vehicle. 5. The vehicle air conditioner according to claim 3, wherein the air conditioner is opened when the temperature is higher than a high upper limit air temperature and closed when the temperature is lower than a lower limit air temperature lower than the target blowout temperature. Dehumidification determination means for determining whether dehumidification of the vehicle interior is necessary,
The flow path opening / closing valve determines that it is necessary to dehumidify the vehicle interior by the dehumidification determining means, 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 vehicle air conditioner according to claim 3, wherein the air conditioner is opened when the temperature is higher than an upper limit air temperature higher than the target cooling air temperature, and is closed when the temperature is lower than a lower limit air temperature lower than the target cooling air temperature. An air conditioning system that closes the refrigerant flow path upstream of the heat absorber in the refrigerant flow direction when the amount of heat absorbed by the battery heat absorber is insufficient while the battery temperature is controlled by the battery cooling priority control means. The vehicle air conditioner according to any one of claims 2 to 6, further comprising an operation control unit. In a state where the temperature of the air cooled in the heat absorber is controlled by the air conditioning priority control means, and the battery is cooled by the battery cooling heat absorber, the temperature of the battery cooled in the battery cooling heat absorber is determined by The vehicle air conditioner according to claim 1, wherein the control is performed by adjusting an opening degree of a refrigerant flow path on an upstream side of the battery cooling heat absorber in a refrigerant flow direction. On the upstream side in the refrigerant flow direction of the battery cooling heat absorber, a flow path opening / closing valve for opening / closing the refrigerant flow path and an expansion valve for reducing the pressure of the refrigerant are connected,
The vehicle air conditioner according to claim 8, wherein the temperature of the battery cooled in the battery cooling heat absorber is controlled by switching the opening degree of the flow path on-off valve between full opening and full closing. On the upstream side in the refrigerant flow direction of the battery cooling heat absorber, a flow path opening / closing valve for opening / closing the refrigerant flow path and an expansion valve for reducing the pressure of the refrigerant are connected,
The vehicle air conditioner according to claim 8, wherein the temperature of the battery cooled in the battery cooling heat absorber is controlled by switching between two different opening degrees of the flow path on-off valve. The flow path on-off valve is opened when the detected temperature of the battery temperature sensor is higher than an upper limit battery temperature higher than a target battery temperature which is a target cooling temperature of the battery, and is lower than a lower limit battery temperature lower than the target battery temperature. The vehicle air conditioner according to claim 9, wherein the air conditioner is closed when the temperature is low. In a state where the temperature of the air cooled in the heat absorber is controlled by the air-conditioning priority control means, when the heat absorption amount of the refrigerant in the heat absorber is insufficient, the flow of the refrigerant on the upstream side in the refrigerant flow direction of the battery cooling heat absorber is reduced. The vehicle air conditioner according to any one of claims 8 to 11, further comprising a battery cooling operation restricting means for closing a road. Equipped with an outdoor heat exchanger for exchanging heat between the air outside the cabin and the refrigerant,
The outdoor heat exchanger cools the air supplied to the vehicle interior by the heat absorber while controlling the temperature of the battery cooled in the battery cooling heat absorber by the battery cooling priority control means. The vehicle according to any one of claims 1 to 12, wherein when the temperature of the air cooled in the heat absorber is controlled by the control means, the battery functions as a radiator when the battery is cooled by the battery heat absorber. For air conditioners. A radiator that heats the air supplied to the vehicle interior;
The air conditioner for a vehicle according to any one of claims 1 to 13, further comprising: an air heater configured to heat air flowing upstream or downstream of the radiator in the air flow direction. The switching between the adjustment of the rotation speed of the compressor by the battery cooling priority control unit and the adjustment of the rotation speed of the compressor by the air conditioning priority control unit is performed after the driving of the compressor is stopped. An air conditioner for a vehicle according to the above. The vehicle air conditioner according to any one of claims 1 to 15, further comprising a notification unit configured to notify a passenger in the vehicle compartment of information regarding air conditioning in the vehicle compartment and cooling of the battery.

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