JP2019166867A - Air conditioner for vehicle - Google Patents

Abstract

To provide an air conditioner for vehicle capable of preventing deterioration of a battery when a temperature of a battery is low or high, in a pre-air conditioning time in a vehicle interior part.SOLUTION: An air conditioner for vehicle comprises an air conditioning controller comprising a pre-air conditioning function for starting air-condition of a vehicle interior part at a prescribed preset pre-air conditioning start scheduled time t1, the air conditioning controller heats a battery 55 before the pre-air conditioning start scheduled time t1 if temperature of the battery 55 is lower than a prescribed allowable lower limit temperature TL, and the air conditioning controller executes a pre-air conditioning time battery warming control for starting air conditioning of a vehicle interior, when the temperature of the battery 55 rises to equal to or more than the allowable lower limit temperature TL.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle air conditioner that is supplied with power from a battery to air-condition a vehicle interior and that can also adjust the temperature of the battery.

  With the recent emergence of environmental problems, vehicles such as hybrid vehicles and electric vehicles that drive a traction motor with electric power supplied from an installed battery have become widespread. As an air conditioner that can be applied to such a vehicle, a refrigerant circuit that includes a compressor, a radiator, a heat absorber, and an outdoor heat exchanger is connected, and refrigerant discharged from the compressor is used. Heating mode (heating operation) in which heat is dissipated in the radiator and the refrigerant dissipated in the radiator is absorbed in the outdoor heat exchanger, and the refrigerant discharged from the compressor is dissipated in the outdoor heat exchanger and absorbed in the heat absorber. A device that switches and executes a cooling mode (cooling operation) has been developed (for example, see Patent Document 1).

  In addition, the electric vehicle as described above supplies air to the vehicle air conditioner from the battery and air-conditions the interior of the vehicle, but charging and discharging is difficult in a high temperature state or a very low temperature state. An apparatus including a battery temperature adjusting device that adjusts the temperature of the battery to a predetermined temperature range has been developed (see, for example, Patent Document 2 and Patent Document 3).

JP 2014-213765 A Japanese Patent No. 5860360 Japanese Patent No. 5860361

  Here, some of these types of vehicle air conditioners have a so-called pre-air conditioning function. This pre-air-conditioning function is a function that allows the temperature of the passenger compartment to be set to an appropriate temperature in advance. The air-conditioning (pre-air-conditioning) of the passenger compartment is performed at a time preset by the user (time before departure). For example, if pre-air conditioning in the passenger compartment starts at a very low temperature, for example, the current that can be output from the battery will be reduced, resulting in excessive power demand and adversely affecting the durability of the battery itself. become. This is the same even when the battery is at a high temperature. If the battery is discharged at a very low temperature or a high temperature at the start of pre-air conditioning, the battery will be significantly deteriorated.

  The present invention has been made to solve the conventional technical problem, and can prevent deterioration of the battery when the temperature of the battery is low or high during pre-air conditioning in the vehicle interior. An object of the present invention is to provide a vehicle air conditioner.

  The vehicle air conditioner according to the first aspect of the present invention is powered by the battery to air-condition the vehicle interior and adjusts the temperature of the battery, and the vehicle interior is set at a predetermined pre-air-conditioning start scheduled time. A control device having a pre-air-conditioning function for starting the air-conditioning, and when the temperature of the battery is lower than a predetermined allowable lower limit temperature, the control device heats the battery before the pre-air-conditioning start scheduled time, When the temperature rises above the allowable lower limit temperature, pre-air-conditioning battery temperature adjustment control is executed to start air conditioning in the passenger compartment.

  According to a second aspect of the present invention, there is provided a vehicular air conditioner according to the present invention, wherein, in the pre-air-conditioning battery temperature control, the control device is prior to the pre-air conditioning start scheduled time when the battery temperature is higher than a predetermined allowable upper limit temperature. When the battery is cooled and the temperature of the battery falls below the allowable upper limit temperature, air conditioning in the vehicle interior is started.

  According to a third aspect of the present invention, there is provided an air conditioner for a vehicle which is powered by a battery to air-condition the vehicle interior and adjusts the temperature of the battery. A control device having a pre-air conditioning function for starting the air conditioning of the battery, and when the temperature of the battery is higher than a predetermined allowable upper limit temperature, the control device cools the battery before the pre-air conditioning start scheduled time, When the temperature falls below the allowable upper limit temperature, pre-air-conditioning battery temperature adjustment control is executed to start air conditioning in the passenger compartment.

  When the pre-air conditioning start scheduled time is set, the vehicle air conditioner of the invention of claim 4 determines the temperature of the battery at a time before the pre air conditioning start scheduled time, When the temperature of the battery is lower than the allowable lower limit temperature or when the temperature of the battery is higher than the allowable upper limit temperature, battery temperature adjustment control during pre-air conditioning is executed.

  According to a fifth aspect of the present invention, in the vehicle air conditioner according to the fifth aspect of the present invention, the control device determines the temperature of the battery every predetermined time from a predetermined time before the pre-air conditioning start scheduled time, and the temperature of the battery is lower than the allowable lower limit temperature. The lower the difference is, or the higher the difference is, or the higher the difference is, the more the battery temperature adjustment control is started at an earlier time.

  In the vehicle air conditioner according to the sixth aspect of the present invention, the time when the control device starts pre-air conditioning battery temperature control in the above invention is the time when the temperature of the battery becomes equal to or higher than the allowable lower limit temperature by the pre-air conditioning start scheduled time. Or, it is a point of time when the temperature falls below the allowable upper limit temperature.

  According to a seventh aspect of the present invention, there is provided an air conditioner for a vehicle according to the present invention, wherein the compressor compresses the refrigerant, the radiator that radiates the refrigerant and heats the air supplied to the vehicle interior, and the vehicle interior that absorbs the refrigerant. A heat absorber that cools the air supplied to the vehicle, an outdoor heat exchanger that is provided outside the passenger compartment to absorb or dissipate the refrigerant, and a battery temperature adjustment device that adjusts the temperature of the battery by circulating a heat medium in the battery The battery temperature adjusting device includes a refrigerant-heat medium heat exchanger that exchanges heat between the refrigerant and the heat medium, and a heating device that heats the heat medium. Battery temperature adjustment control during pre-air conditioning is executed using the temperature of the heat medium as the battery temperature.

  According to the first aspect of the present invention, in the vehicle air conditioner that is powered from the battery to air-condition the vehicle interior and adjusts the temperature of the battery, the air-conditioning of the vehicle interior is performed at a predetermined preset pre-air-conditioning start scheduled time. When the temperature of the battery is lower than the predetermined allowable lower limit temperature, the control device heats the battery before the pre-air conditioning start scheduled time, and the temperature of the battery When the temperature of the battery rises above the allowable lower limit temperature, the pre-air-conditioning battery temperature adjustment control is started to start air conditioning in the vehicle interior. The battery can be heated before the pre-air-conditioning is started under the situation where the electric power is required.

  And since the control device starts the air conditioning of the vehicle interior after the temperature of the battery rises above the allowable lower limit temperature, it becomes possible to prevent deterioration of the battery when pre-air conditioning the vehicle interior, Pre-air conditioning in the passenger compartment can be performed smoothly while improving durability.

  According to the invention of claim 2 or claim 3, in the pre-air-conditioning battery temperature adjustment control, when the temperature of the battery is higher than a predetermined allowable upper limit temperature, the control device removes the battery before the pre-air-conditioning start scheduled time When cooling and the temperature of the battery falls below the allowable upper limit temperature, the air conditioning of the vehicle interior is started, so if the temperature of the battery is high when performing the pre air conditioning of the vehicle interior, The battery can be cooled before starting.

  And since the control device starts air conditioning in the vehicle interior after the temperature of the battery falls below the allowable upper limit temperature, it similarly prevents deterioration of the battery when pre-air conditioning the vehicle interior and improves its durability. As a result, the pre-air conditioning in the passenger compartment can be performed smoothly.

  In this case, when the pre-air-conditioning start scheduled time is set as in the invention of claim 4, the control device determines the battery temperature at a time before the pre-air-conditioning start scheduled time, and the battery temperature falls within the allowable lower limit. If the temperature is lower than the temperature, or if the temperature of the battery is higher than the allowable upper limit temperature, the battery temperature control before the pre-air conditioning can be realized smoothly by executing the battery temperature control during the pre-air conditioning. Become.

  In particular, as in the invention of claim 5, the control device determines the temperature of the battery every predetermined time from the predetermined time before the pre-air conditioning start scheduled time, and the temperature of the battery is lower than the allowable lower limit temperature, and the difference is larger. Alternatively, if the temperature of the battery is higher than the allowable upper limit temperature and the difference is larger, the battery temperature adjustment control is started at the pre-air-conditioning start scheduled time if the pre-air-conditioning battery temperature control is started from an earlier time point. It becomes possible to set it more than an allowable minimum temperature or below an allowable upper limit temperature.

  In this case, for example, as in the sixth aspect of the present invention, the time when the control device starts the battery temperature adjustment control during pre-air conditioning is the time when the temperature of the battery becomes equal to or higher than the allowable lower limit temperature by the pre-air conditioning start scheduled time. By setting in advance as the time when the temperature becomes lower than or equal to the upper limit temperature, the battery temperature can be reliably set to be equal to or higher than the allowable lower limit temperature or lower than the allowable upper limit temperature at the pre-air conditioning start scheduled time.

  According to a seventh aspect of the present invention, a vehicle air conditioner includes a compressor that compresses a refrigerant, a radiator that heats the air that dissipates the refrigerant and supplies the air to the vehicle interior, and absorbs heat from the refrigerant into the vehicle interior. A heat absorber that cools the air to be supplied, an outdoor heat exchanger that is provided outside the passenger compartment to absorb or dissipate the refrigerant, and a battery temperature adjusting device that circulates a heat medium in the battery and adjusts the temperature of the battery. The battery temperature adjusting device includes a refrigerant-heat medium heat exchanger that exchanges heat between the refrigerant and the heat medium, and a heating device that heats the heat medium, and the controller is configured to control the temperature or heat of the battery itself. If the temperature control of the battery is performed using the temperature of the medium as the temperature of the battery, each of the above inventions can be realized smoothly.

It is a block diagram of one Example of the air conditioning apparatus for vehicles to which this invention is applied. It is a block diagram of the air-conditioning controller as a control apparatus of the vehicle air conditioner of FIG. It is a figure explaining the heating operation by the air-conditioning controller of FIG. It is a figure explaining the dehumidification heating operation by the air-conditioning controller of FIG. It is a figure explaining the internal cycle driving | operation by the air-conditioning controller of FIG. It is a figure explaining the dehumidification cooling operation / cooling operation by the air-conditioning controller of FIG. It is a figure explaining the heating / battery temperature control mode by the air-conditioning controller of FIG. It is a figure explaining the dehumidification cooling / battery temperature control mode (cooling / battery temperature control mode) by the air-conditioning controller of FIG. It is a figure explaining the internal cycle / battery temperature control mode by the air-conditioning controller of FIG. It is a figure explaining the dehumidification heating / battery temperature control mode by the air-conditioning controller of FIG. It is a figure explaining the battery temperature control single mode by the air-conditioning controller of FIG. 2 (the battery cooling mode in the battery temperature control at the time of pre air conditioning is also the same). It is a figure explaining the battery heating mode in the battery temperature control at the time of the pre air conditioning by the air conditioning controller of FIG. It is a figure which shows transition of the battery temperature in the battery heating mode in the battery temperature control at the time of the pre air conditioning of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a configuration diagram of a vehicle air conditioner 1 according to an embodiment to which the present invention is applied. The vehicle air conditioner 1 of the present invention is mounted on a vehicle, and constitutes a part of a vehicle control system (vehicle control system VC) in the embodiment.

  Further, the vehicle of the embodiment to be applied is an electric vehicle (EV) in which an engine (internal combustion engine) is not mounted, and a battery 55 (for example, a lithium battery) is mounted on the vehicle, and a quick charger or a household commercial vehicle is used. Driving is performed by supplying electric power charged in the battery 55 from an external power source such as a power source (normal charging) to the electric motor 65 for traveling. The vehicle air conditioner 1 is also driven by power supplied from the battery 55.

  That is, the vehicle air conditioner 1 performs heating operation by heat pump operation using the refrigerant circuit R in an electric vehicle that cannot be heated by engine waste heat, and further performs dehumidification heating operation, internal cycle operation, dehumidification cooling operation, cooling The vehicle interior is air-conditioned by selectively executing each air-conditioning operation. Needless to say, the present invention is not limited to an electric vehicle as a vehicle, but also to a so-called hybrid vehicle using an engine and an electric motor for traveling.

  The vehicle air conditioner 1 according to the embodiment performs air conditioning (heating, cooling, dehumidification, and ventilation) in a vehicle interior of an electric vehicle, and includes an electric compressor 2 that compresses refrigerant and vehicle interior air. Is provided in the air flow passage 3 of the HVAC unit 10 through which air is circulated, and the high-temperature and high-pressure refrigerant discharged from the compressor 2 flows in through the refrigerant pipe 13G, and dissipates the refrigerant into the vehicle compartment. And an outdoor expansion valve 6 comprising an electric valve that decompresses and expands the refrigerant during heating, and functions as a radiator that radiates the refrigerant during cooling and functions as an evaporator that absorbs the refrigerant during heating. An outdoor heat exchanger 7 that performs heat exchange, an indoor expansion valve 8 that includes an electric valve that decompresses and expands the refrigerant, and heat absorption that is provided in the air flow passage 3 and that absorbs heat from outside the vehicle interior during cooling and dehumidification. Vessel 9 and Accu Regulator 12 and the like are sequentially connected by a refrigerant pipe 13, the refrigerant circuit R is formed. The outdoor expansion valve 6 and the indoor expansion valve 8 allow the refrigerant to expand under reduced pressure and can be fully opened and fully closed.

  The outdoor heat exchanger 7 is provided with an outdoor blower 15. The outdoor blower 15 exchanges heat between the outside air and the refrigerant by forcibly passing outside air through the outdoor heat exchanger 7, so that the outdoor air blower 15 can also be used outdoors even when the vehicle is stopped (that is, the vehicle speed is 0 km / h). It is comprised so that external air may be ventilated by the heat exchanger 7. FIG. Reference numeral 23 in the figure denotes a shutter called a grill shutter. When the shutter 23 is closed, the traveling wind is prevented from flowing into the outdoor heat exchanger 7.

  The refrigerant pipe 13 </ b> A connected to the refrigerant outlet side of the outdoor heat exchanger 7 is connected to the refrigerant pipe 13 </ b> B via the check valve 18. The check valve 18 has a forward direction on the refrigerant pipe 13B side, and the refrigerant pipe 13B is connected to the indoor expansion valve 8.

  Further, the refrigerant pipe 13A exiting from the outdoor heat exchanger 7 is branched, and this branched refrigerant pipe 13D is a refrigerant pipe 13C located on the outlet side of the heat absorber 9 via an electromagnetic valve 21 opened during heating. It is connected in communication. The refrigerant pipe 13 </ b> C is connected to the accumulator 12, and the accumulator 12 is connected to the refrigerant suction side of the compressor 2.

  Furthermore, the refrigerant pipe 13E on the outlet side of the radiator 4 is branched into a refrigerant pipe 13J and a refrigerant pipe 13F before the outdoor expansion valve 6 (the refrigerant upstream side), and one of the branched refrigerant pipes 13J is the outdoor expansion valve 6. Is connected to the refrigerant inlet side of the outdoor heat exchanger 7. The other branched refrigerant pipe 13 </ b> F is a refrigerant pipe 13 </ b> A and a refrigerant pipe located on the refrigerant downstream side of the check valve 18 and on the refrigerant upstream side of the indoor expansion valve 8 via an electromagnetic valve 22 opened during dehumidification. 13B is connected in communication with the connecting portion.

  Thus, the refrigerant pipe 13F is connected in parallel to the series circuit of the outdoor expansion valve 6, the outdoor heat exchanger 7 and the check valve 18, and the outdoor expansion valve 6, the outdoor heat exchanger 7 and the check valve are connected. The circuit bypasses the circuit 18.

  The air flow passage 3 on the air upstream side of the heat absorber 9 is formed with each of an outside air inlet and an inside air inlet (represented by the inlet 25 in FIG. 1). 25 is provided with a suction switching damper 26 for switching the air introduced into the air flow passage 3 between the inside air (inside air circulation) which is air inside the vehicle compartment and the outside air (outside air introduction) which is outside the vehicle compartment. Furthermore, an indoor blower (blower fan) 27 for supplying the introduced inside air or outside air to the air flow passage 3 is provided on the air downstream side of the suction switching damper 26.

  Further, the air (inside air and outside air) in the air flow passage 3 after flowing into the air flow passage 3 and passing through the heat absorber 9 is radiated into the air flow passage 3 on the air upstream side of the radiator 4. An air mix damper 28 that adjusts the rate of ventilation through the vessel 4 is provided. Further, FOOT (foot), VENT (vent), and DEF (def) outlets (represented by the outlet 29 as a representative in FIG. 1) are formed in the air flow passage 3 on the air downstream side of the radiator 4. The air outlet 29 is provided with an air outlet switching damper 31 that performs switching control of air blowing from the air outlets.

  Furthermore, the vehicle air conditioner 1 includes a battery temperature adjustment device 61 for adjusting the temperature of the battery 55 by circulating a heat medium through the battery 55. The battery temperature adjustment device 61 of the embodiment includes a circulation pump 62 as a circulation device for circulating a heat medium through the battery 55, a heat medium heater 66 as a heating device, and a refrigerant-heat medium heat exchanger 64. These and the battery 55 are annularly connected by a heat medium pipe 68.

  In this embodiment, the heat medium heater 66 is connected to the discharge side of the circulation pump 62, the inlet of the heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64 is connected to the outlet of the heat medium heater 66, The inlet of the battery 55 is connected to the outlet of the heat medium flow path 64 </ b> A, and the outlet of the battery 55 is connected to the suction side of the circulation pump 62.

  As the heat medium used in the battery temperature adjusting device 61, for example, water, a refrigerant such as HFO-1234yf, a liquid such as a coolant, or a gas such as air can be employed. In the embodiment, water is used as the heat medium. The heat medium heater 66 is composed of an electric heater such as a PTC heater. Furthermore, it is assumed that a jacket structure is provided around the battery 55 so that the heat medium can circulate with the battery 55 in a heat exchange relationship.

  When the circulation pump 62 is operated, the heat medium discharged from the circulation pump 62 reaches the heat medium heater 66. If the heat medium heater 66 generates heat, it is heated there, and then It flows into the heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64. The heat medium exiting the heat medium flow path 64 </ b> A of the refrigerant-heat medium heat exchanger 64 reaches the battery 55. The heat medium exchanges heat therewith with the battery 55 and is then circulated through the heat medium pipe 68 by being sucked into the circulation pump 62.

  On the other hand, the outlet of the refrigerant pipe 13F of the refrigerant circuit R, that is, the connecting portion between the refrigerant pipe 13F, the refrigerant pipe 13A, and the refrigerant pipe 13B is on the refrigerant downstream side (forward direction side) of the check valve 18, One end of a branch pipe 72 serving as a branch circuit is connected to the refrigerant upstream side of the expansion valve 8. The branch pipe 72 is provided with an auxiliary expansion valve 73 composed of an electric valve. The auxiliary expansion valve 73 decompresses and expands the refrigerant flowing into a refrigerant flow path 64B (described later) of the refrigerant-heat medium heat exchanger 64 and can be fully closed.

  The other end of the branch pipe 72 is connected to the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64, and one end of the refrigerant pipe 74 is connected to the outlet of the refrigerant flow path 64B. The other end is connected to the refrigerant pipe 13C in front of the accumulator 12 (the refrigerant upstream side). The auxiliary expansion valve 73 and the like also constitute part of the refrigerant circuit R and at the same time constitute part of the battery temperature adjusting device 61.

  When the auxiliary expansion valve 73 is open, the refrigerant (a part or all of the refrigerant) discharged from the refrigerant pipe 13F and the outdoor heat exchanger 7 is decompressed by the auxiliary expansion valve 73, and then the refrigerant-heat medium heat exchanger. 64 flows into the refrigerant flow path 64B and evaporates there. The refrigerant absorbs heat from the heat medium flowing through the heat medium flow path 64A in the process of flowing through the refrigerant flow path 64B, and then is sucked into the compressor 2 through the accumulator 12.

  Next, in FIG. 2, reference numeral 30 denotes a control unit of the vehicle control system VC according to the embodiment. The control unit 30 mainly includes an air conditioning controller 32 as a control device that controls the vehicle air conditioner 1, and the vehicle in general. The vehicle controller 35 (ECU) that controls the control of the battery 55 and the battery controller 40 that controls the charge and discharge of the battery 55 are connected via the vehicle communication bus 45 to transmit and receive information. It is said that. Each of the air conditioning controller 32, the vehicle controller 35 (ECU), and the battery controller 40 is constituted by a microcomputer as an example of a computer including a processor.

The input of the air conditioning controller 32 (control device) is sucked into the air flow passage 3 from the outside air temperature sensor 33 that detects the outside air temperature (Tam) of the vehicle, the outside air humidity sensor 34 that detects the outside air humidity, and the suction port 25. An HVAC suction temperature sensor 36 that detects the temperature of the air, an internal air temperature sensor 37 that detects the temperature of the air (inside air) in the vehicle interior, an internal air humidity sensor 38 that detects the humidity of the air in the vehicle interior, and a carbon dioxide in the vehicle interior An indoor CO ₂ concentration sensor 39 that detects the carbon concentration, a blowout temperature sensor 41 that detects the temperature of the air blown into the vehicle compartment from the blowout port 29, and a refrigerant discharge pressure (discharge pressure Pd) of the compressor 2 are detected. The discharge pressure sensor 42, the discharge temperature sensor 43 that detects the discharge refrigerant temperature of the compressor 2, the suction temperature sensor 44 that detects the suction refrigerant temperature of the compressor 2, and the temperature of the radiator 4 The temperature of the air passing through the radiator 4 or the temperature of the radiator 4 itself: the radiator temperature sensor 46 for detecting the temperature of the radiator 4 and the refrigerant pressure of the radiator 4 (in the radiator 4 or in the radiator 4 The pressure of the refrigerant immediately after leaving the radiator: the radiator pressure sensor 47 for detecting the radiator pressure PCI) and the temperature of the heat absorber 9 (the temperature of the air passing through the heat absorber 9 or the temperature of the heat absorber 9 itself: the heat absorber) An endothermic temperature sensor 48 for detecting the temperature Te), an endothermic pressure sensor 49 for detecting the refrigerant pressure of the endothermic device 9 (the inside of the endothermic device 9 or the pressure of the refrigerant immediately after leaving the endothermic device 9), a vehicle For example, a photosensor-type solar radiation sensor 51 for detecting the amount of solar radiation into the room, a vehicle speed sensor 52 for detecting the moving speed (vehicle speed) of the vehicle, and an air conditioner for setting the switching between the set temperature and the air-conditioning operation. Temperature of the operation unit 53 and the outdoor heat exchanger 7 (outdoor heat The temperature of the refrigerant immediately after leaving the exchanger 7 or the temperature of the outdoor heat exchanger 7 itself: the outdoor heat exchanger temperature TXO When the outdoor heat exchanger 7 functions as an evaporator, the outdoor heat exchanger temperature TXO is The outdoor heat exchanger temperature sensor 54 detects the refrigerant evaporating temperature in the outdoor heat exchanger 7 and the refrigerant pressure of the outdoor heat exchanger 7 (in the outdoor heat exchanger 7 or from the outdoor heat exchanger 7). Each output of the outdoor heat exchanger pressure sensor 56 for detecting the pressure of the refrigerant immediately after) is connected.

  Further, the input of the air conditioning controller 32 further includes the temperature of the battery 55 (the temperature of the battery 55 itself, the temperature of the heat medium exiting the battery 55, or the temperature of the heat medium entering the battery 55: battery temperature Tb). A battery temperature sensor 76 to detect, a heat medium heater temperature sensor 77 to detect the temperature of the heat medium heater 66 (the temperature of the heat medium heater 66 itself, the temperature of the heat medium that has exited the heat medium heater 66), A first outlet temperature sensor 78 that detects the temperature of the heat medium that has exited the heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64, and a second outlet temperature that detects the temperature of the refrigerant that has exited the refrigerant flow path 64B. Each output of the sensor 79 is also connected.

  On the other hand, the output of the air conditioning controller 32 includes the compressor 2, the outdoor fan 15, the indoor fan (blower fan) 27, the suction switching damper 26, the air mix damper 28, the outlet switching damper 31, the outdoor The expansion valve 6, the indoor expansion valve 8, the electromagnetic valve 22 (dehumidification), the electromagnetic valve 21 (heating), the shutter 23, the circulation pump 62, the heat medium heater 66, and the auxiliary expansion valve 73 are connected. Yes. Further, a first switch (contact point) 81 and a second switch (contact point) 82, which will be described later, are also connected to the output of the air conditioning controller 32, and the switches 81 and 82 are controlled to be opened and closed by the air conditioning controller 32. ing. The air conditioning controller 32 controls these based on the output of each sensor, the setting input in the air conditioning operation unit 53, and information from the vehicle controller 35 and the battery controller 40.

  The vehicle controller 35 governs overall control including traveling of the vehicle (electric vehicle in the embodiment), and an electric motor 65 for traveling is connected to the output of the vehicle controller 35. Note that the charging plug 60 connected to an external power source (such as a quick charger) has a contact, and when the plug 60 is connected to an external power source, the state of the contact changes, indicating that the change has occurred. The contact information is transmitted to the vehicle controller 35. The vehicle controller 35 detects that the plug 60 is connected to the external power source from the contact information, and transmits information to that effect to the air conditioning controller 32 and the battery controller 40.

  The battery controller 40 is connected to the plug 60 described above, which is connected to an external power source during charging. The battery controller 40 controls charging from the external power source to the battery 55 and discharging from the battery 55. The battery controller 40 according to the embodiment controls charging / discharging of the battery 55 based on information transmitted from the vehicle controller 35 and the air conditioning controller 32, and provides information on the charge amount (remaining charge amount) remaining in the battery 55 to the vehicle controller 35. Or to the air conditioning controller 32.

  In the embodiment, the electric wiring 83 from the battery 55 is electrically connected to the electric device on the refrigerant circuit R side including the compressor 2 via the first switch 81 described above, and the first switch 81 is closed. Thus, power can be supplied from the battery 55 to the compressor 2 and the like. Further, an electrical wiring 84 is further branched from the electrical wiring 83 between the first switch 81 and the battery 55, and this electrical wiring 84 is connected to the battery temperature including the heat medium heater 66 via the second switch 82 described above. The adjustment device 61 is electrically connected to an electric device. The second switch 82 is closed so that power can be supplied from the battery 55 to the heat medium heater 66 and the like (FIG. 1). However, each operation / energization control of each electric device such as the compressor 2 and the heat medium heater 66 is individually performed by the air conditioning controller 32 of the control unit 30 or the like.

  Next, the operation of the vehicle air conditioner 1 of the embodiment having the above configuration will be described. In the embodiment, the air-conditioning controller 32 (control device) performs switching between the air-conditioning operation of the heating operation, the dehumidifying heating operation, the internal cycle operation, the dehumidifying and cooling operation, and the cooling operation, and sets the temperature of the battery 55 to a predetermined value. Adjust within the proper temperature range. First, each air conditioning operation of the refrigerant circuit R of the vehicle air conditioner 1 during operation of the vehicle will be described.

(1) Heating Operation First, the heating operation will be described with reference to FIG. FIG. 3 shows a refrigerant flow (solid arrow) in the refrigerant circuit R in the heating operation. The air conditioning controller 32 closes the first switch 81 and opens the second switch 82. Thereby, electric power can be supplied from the battery 55 via the electric wiring 83 to the electric equipment of the refrigerant circuit R including the compressor 2 of the vehicle air conditioner 1 (the same applies to FIGS. 4 to 6).

  When the heating operation is selected by the air conditioning controller 32 (auto mode) or by the manual operation (manual mode) to the air conditioning operation unit 53, the air conditioning controller 32 opens the electromagnetic valve 21 (for heating), and the indoor expansion valve 8 is fully closed. Further, the electromagnetic valve 22 (for dehumidification) is closed. The shutter 23 is opened.

  And the compressor 2 and each air blower 15 and 27 are drive | operated, and the air mix damper 28 sets it as the state which adjusts the ratio by which the air blown out from the indoor air blower 27 is ventilated by the heat radiator 4. FIG. Thereby, the high-temperature and high-pressure gas refrigerant discharged from the compressor 2 flows into the radiator 4. Since the air in the air flow passage 3 is passed through the radiator 4, the air in the air flow passage 3 is heated by the high-temperature refrigerant in the radiator 4, while the refrigerant in the radiator 4 heats the air. Deprived, cooled, and condensed into liquid.

  The refrigerant liquefied in the radiator 4 exits the radiator 4 and then reaches the outdoor expansion valve 6 through the refrigerant pipes 13E and 13J. The refrigerant flowing into the outdoor expansion valve 6 is decompressed there and then flows into the outdoor heat exchanger 7. The refrigerant flowing into the outdoor heat exchanger 7 evaporates, and pumps up heat from the outside air that is ventilated by traveling or by the outdoor blower 15 (heat absorption). That is, the refrigerant circuit R becomes a heat pump. Then, the low-temperature refrigerant exiting the outdoor heat exchanger 7 enters the accumulator 12 through the refrigerant pipe 13C through the refrigerant pipe 13A, the refrigerant pipe 13D, and the electromagnetic valve 21, and is separated into gas and liquid there. Repeated circulation inhaled. Since the air heated by the radiator 4 is blown out from the air outlet 29, the vehicle interior is thereby heated.

  The air conditioning controller 32 determines a target radiator pressure PCO (a target value of the pressure PCI of the radiator 4) from a target heater temperature TCO (a target value of the air temperature on the leeward side of the radiator 4) calculated from a target outlet temperature TAO described later. And the rotational speed of the compressor 2 is controlled based on the target radiator pressure PCO and the refrigerant pressure of the radiator 4 (radiator pressure PCI; high pressure of the refrigerant circuit R) detected by the radiator pressure sensor 47. And controlling the valve opening degree of the outdoor expansion valve 6 based on the temperature of the radiator 4 (the radiator temperature TCI) detected by the radiator temperature sensor 46 and the radiator pressure PCI detected by the radiator pressure sensor 47, The degree of supercooling of the refrigerant at the outlet of the radiator 4 is controlled. The target heater temperature TCO is basically set to TCO = TAO, but a predetermined restriction on control is provided.

(2) Dehumidifying and Heating Operation Next, the dehumidifying and heating operation will be described with reference to FIG. FIG. 4 shows the refrigerant flow (solid arrow) in the refrigerant circuit R in the dehumidifying heating operation. In the dehumidifying heating operation, the air conditioning controller 32 opens the electromagnetic valve 22 in the heating operation state and opens the indoor expansion valve 8 so that the refrigerant is decompressed and expanded. Further, the shutter 23 is opened. Thereby, a part of the condensed refrigerant flowing through the refrigerant pipe 13E through the radiator 4 is divided, and the divided refrigerant flows into the refrigerant pipe 13F through the electromagnetic valve 22, and flows from the refrigerant pipe 13B to the indoor expansion valve 8. The remaining refrigerant flows into the outdoor expansion valve 6. That is, a part of the divided refrigerant is decompressed by the indoor expansion valve 8 and then flows into the heat absorber 9 to evaporate.

  The air conditioning controller 32 controls the valve opening degree of the indoor expansion valve 8 so that the superheat degree (SH) of the refrigerant at the outlet of the heat absorber 9 is maintained at a predetermined value. Thus, since moisture in the air blown out from the indoor blower 27 condenses and adheres to the heat absorber 9, the air is cooled and dehumidified. The remaining refrigerant that is divided and flows into the refrigerant pipe 13J is depressurized by the outdoor expansion valve 6 and then evaporated by the outdoor heat exchanger 7.

  The refrigerant evaporated in the heat absorber 9 flows out into the refrigerant pipe 13C and joins with the refrigerant from the refrigerant pipe 13D (the refrigerant from the outdoor heat exchanger 7), and then repeats circulation that is sucked into the compressor 2 through the accumulator 12. Since the air dehumidified by the heat absorber 9 is reheated in the process of passing through the radiator 4, dehumidifying heating in the passenger compartment is thereby performed.

  The air conditioning controller 32 controls the rotational speed of the compressor 2 based on the target radiator pressure PCO calculated from the target heater temperature TCO and the radiator pressure PCI (high pressure of the refrigerant circuit R) detected by the radiator pressure sensor 47. At the same time, the valve opening degree of the outdoor expansion valve 6 is controlled based on the temperature of the heat absorber 9 (heat absorber temperature Te) detected by the heat absorber temperature sensor 48.

(3) Internal cycle operation Next, the internal cycle operation will be described with reference to FIG. FIG. 5 shows a refrigerant flow (solid arrow) in the refrigerant circuit R in the internal cycle operation. In the internal cycle operation, the air conditioning controller 32 fully closes the outdoor expansion valve 6 in the dehumidifying and heating operation state (fully closed position). However, the solenoid valve 21 is kept open, and the refrigerant outlet of the outdoor heat exchanger 7 is communicated with the refrigerant suction side of the compressor 2. That is, since this internal cycle operation is a state in which the outdoor expansion valve 6 is fully closed by the control of the outdoor expansion valve 6 in the dehumidifying and heating operation, this internal cycle operation can also be regarded as a part of the dehumidifying and heating operation ( The shutter 23 is open).

  However, since the inflow of the refrigerant to the outdoor heat exchanger 7 is blocked by closing the outdoor expansion valve 6, the condensed refrigerant flowing through the refrigerant pipe 13 </ b> E via the radiator 4 passes through the electromagnetic valve 22 and becomes refrigerant. All flows into the pipe 13F. The refrigerant flowing through the refrigerant pipe 13F reaches the indoor expansion valve 8 through the refrigerant pipe 13B. After the refrigerant is depressurized by the indoor expansion valve 8, it flows into the heat absorber 9 and evaporates. Since the moisture in the air blown out from the indoor blower 27 by the heat absorption action at this time condenses and adheres to the heat absorber 9, the air is cooled and dehumidified.

  The refrigerant evaporated in the heat absorber 9 flows through the refrigerant pipe 13 </ b> C and repeats circulation that is sucked into the compressor 2 through the accumulator 12. Since the air dehumidified by the heat absorber 9 is reheated in the process of passing through the radiator 4, dehumidifying heating in the passenger compartment is thereby performed. Since the refrigerant is circulated between the radiator 4 (radiation) and the heat absorber 9 (heat absorption) in the passage 3, heat from the outside air is not pumped up, and heating for the consumed power of the compressor 2 is performed. Ability is demonstrated. Since the entire amount of the refrigerant flows through the heat absorber 9 that exhibits the dehumidifying action, the dehumidifying capacity is higher than the dehumidifying and heating operation, but the heating capacity is lowered.

  Although the outdoor expansion valve 6 is closed, the electromagnetic valve 21 is open, and the refrigerant outlet of the outdoor heat exchanger 7 communicates with the refrigerant suction side of the compressor 2, so that the liquid in the outdoor heat exchanger 7 is The refrigerant flows out through the refrigerant pipe 13D and the electromagnetic valve 21 to the refrigerant pipe 13C, is collected by the accumulator 12, and the outdoor heat exchanger 7 is in a gas refrigerant state. Thereby, compared with when the solenoid valve 21 is closed, the amount of refrigerant circulating in the refrigerant circuit R increases, and the heating capacity in the radiator 4 and the dehumidifying capacity in the heat absorber 9 can be improved.

  The air conditioning controller 32 controls the rotation speed of the compressor 2 based on the temperature of the heat absorber 9 or the above-described radiator pressure PCI (high pressure of the refrigerant circuit R). At this time, the air conditioning controller 32 controls the compressor 2 by selecting the lower one of the compressor target rotational speeds obtained from either calculation, depending on the temperature of the heat absorber 9 or the radiator pressure PCI.

(4) Dehumidifying and Cooling Operation Next, the dehumidifying and cooling operation will be described with reference to FIG. FIG. 6 shows a refrigerant flow (solid arrow) in the refrigerant circuit R in the dehumidifying and cooling operation. In the dehumidifying and cooling operation, the air conditioning controller 32 opens the indoor expansion valve 8 to make the refrigerant decompress and expand, and closes the electromagnetic valve 21 and the electromagnetic valve 22. And the compressor 2 and each air blower 15 and 27 are drive | operated, and the air mix damper 28 sets it as the state which adjusts the ratio by which the air blown out from the indoor air blower 27 is ventilated by the heat radiator 4. FIG. Further, the shutter 23 is opened. Thereby, the high-temperature and high-pressure gas refrigerant discharged from the compressor 2 flows into the radiator 4. Since the air in the air flow passage 3 is passed through the radiator 4, the air in the air flow passage 3 is heated by the high-temperature refrigerant in the radiator 4, while the refrigerant in the radiator 4 heats the air. It is deprived and cooled, and condensates.

  The refrigerant that has exited the radiator 4 reaches the outdoor expansion valve 6 through the refrigerant pipe 13E, and flows into the outdoor heat exchanger 7 through the outdoor expansion valve 6 that is controlled to open. The refrigerant flowing into the outdoor heat exchanger 7 is cooled and condensed by running there or by the outside air ventilated by the outdoor blower 15. The refrigerant exiting the outdoor heat exchanger 7 enters the refrigerant pipe 13B through the refrigerant pipe 13A and the check valve 18, and reaches the indoor expansion valve 8. After the refrigerant is depressurized by the indoor expansion valve 8, it flows into the heat absorber 9 and evaporates. Since the moisture in the air blown out from the indoor blower 27 by the heat absorption action at this time condenses and adheres to the heat absorber 9, the air is cooled and dehumidified.

  The refrigerant evaporated in the heat absorber 9 reaches the accumulator 12 through the refrigerant pipe 13C, and repeats circulation that is sucked into the compressor 2 through the refrigerant pipe 13C. Air that has been cooled and dehumidified by the heat absorber 9 is reheated in the process of passing through the radiator 4 (reheating: lower heat dissipation capacity than during heating), so that dehumidification and cooling of the passenger compartment is performed. become.

  The air conditioning controller 32 sets the heat absorber temperature Te to the target heat absorber temperature TEO based on the temperature of the heat absorber 9 (heat absorber temperature Te) detected by the heat absorber temperature sensor 48 and the target heat absorber temperature TEO that is the target value. And the target radiator pressure PCO (radiator pressure) calculated from the radiator pressure PCI (high pressure of the refrigerant circuit R) detected by the radiator pressure sensor 47 and the target heater temperature TCO. The necessary reheat amount by the radiator 4 is obtained by controlling the valve opening degree of the outdoor expansion valve 6 so that the radiator pressure PCI becomes the target radiator pressure PCO based on the PCI target value).

(5) Cooling operation Next, the cooling operation will be described. The flow of the refrigerant circuit R is the same as in the dehumidifying and cooling operation of FIG. In the cooling operation, the air conditioning controller 32 fully opens the valve opening degree of the outdoor expansion valve 6 in the dehumidifying and cooling operation state. Note that the air mix damper 28 is in a state of adjusting the ratio of air passing through the radiator 4. Further, the shutter 23 is opened.

  Thereby, the high-temperature and high-pressure gas refrigerant discharged from the compressor 2 flows into the radiator 4. Although the air in the air flow passage 3 is ventilated to the radiator 4, the ratio is small (because of only reheating during cooling), so this almost passes through, and the refrigerant exiting the radiator 4 is The refrigerant reaches the outdoor expansion valve 6 through the refrigerant pipe 13E. At this time, since the outdoor expansion valve 6 is fully opened, the refrigerant passes through the refrigerant expansion pipe 13J through the outdoor expansion valve 6 and flows into the outdoor heat exchanger 7, where it is ventilated by running or by the outdoor blower 15. It is air-cooled by the outside air and is condensed and liquefied. The refrigerant exiting the outdoor heat exchanger 7 enters the refrigerant pipe 13B through the refrigerant pipe 13A and the check valve 18, and reaches the indoor expansion valve 8. After the refrigerant is depressurized by the indoor expansion valve 8, it flows into the heat absorber 9 and evaporates. Moisture in the air blown out from the indoor blower 27 by the heat absorption action at this time condenses and adheres to the heat absorber 9, and the air is cooled.

  The refrigerant evaporated in the heat absorber 9 reaches the accumulator 12 through the refrigerant pipe 13C, and repeats circulation that is sucked into the compressor 2 through the refrigerant pipe 13C. The air cooled and dehumidified by the heat absorber 9 is blown out from the outlet 29 into the vehicle interior, thereby cooling the vehicle interior. In this cooling operation, the air conditioning controller 32 controls the rotational speed of the compressor 2 based on the temperature of the heat absorber 9 (heat absorber temperature Te) detected by the heat absorber temperature sensor 48.

(6) Switching of air conditioning operation The air conditioning controller 32 calculates the target blowout temperature TAO described above from the following formula (I). This target blowing temperature TAO is a target value of the temperature of the air blown out from the blowout port 29 into the vehicle interior.
TAO = (Tset−Tin) × K + Tbal (f (Tset, SUN, Tam))
.. (I)
Here, Tset is the set temperature in the passenger compartment set by the air conditioning operation unit 53, Tin is the temperature of the passenger compartment air detected by the inside air temperature sensor 37, K is a coefficient, Tbal is the set temperature Tset, and the solar radiation sensor 51 detects This is a balance value calculated from the amount of solar radiation SUN to be performed and the outside air temperature Tam detected by the outside air temperature sensor 33. And generally this target blowing temperature TAO is so high that the outside temperature Tam is low, and it falls as the outside temperature Tam rises.

  The air conditioning controller 32 selects one of the above air conditioning operations based on the outside air temperature Tam detected by the outside air temperature sensor 33 and the target outlet temperature TAO at the time of activation. In addition, after the activation, the air conditioning operations are selected and switched in accordance with changes in the environment and setting conditions such as the outside air temperature Tam and the target blowing temperature TAO.

(7) Temperature Adjustment of Battery 55 Next, temperature adjustment control of the battery 55 by the air conditioning controller 32 will be described with reference to FIGS. Here, the temperature of the battery 55 changes depending on the outside air temperature, and the temperature also changes due to self-heating. When the outside air temperature is a high temperature environment or a very low temperature environment, the temperature of the battery 55 becomes extremely high or extremely low, and charging / discharging becomes difficult.

  Therefore, the air conditioning controller 32 of the vehicle air conditioner 1 according to the embodiment performs the air conditioning operation as described above, and the battery temperature adjusting device 61 controls the temperature of the battery 55 within a predetermined appropriate temperature range (within the use temperature range). Adjust to. The appropriate temperature range of the battery 55 is generally known, but in this application, it is 0 ° C. or higher and + 40 ° C. or lower. In the embodiment, 0 ° C., which is the lower limit value of the appropriate temperature range, is set as a predetermined allowable lower limit temperature TL, and + 40 ° C. is set as a predetermined allowable upper limit temperature TH. In this embodiment, a target battery temperature TBO (for example, + 15 ° C.), which is a target value of the temperature of the battery 55 (battery temperature Tb) detected by the battery temperature sensor 76, is set within this appropriate temperature range.

(7-1) Heating / Battery Temperature Control Mode When it is necessary to adjust the temperature of the battery 55 in the heating operation described above, the air conditioning controller 32 executes the heating / battery temperature control mode. FIG. 7 shows the refrigerant flow (solid arrow) in the refrigerant circuit R and the heat medium flow (broken arrow) in the battery temperature adjusting device 61 in the heating / battery temperature control mode. The air conditioning controller 32 closes the first switch 81 and the second switch 82. As a result, electrical wiring 83 and 84 are connected from the battery 55 to the electrical equipment of the refrigerant circuit R including the compressor 2 of the vehicle air conditioner 1 and the electrical equipment of the battery temperature adjustment device 61 including the heat medium heater 66. Power supply is possible through the same (FIGS. 7 to 11 are also the same).

  In this heating / battery temperature control mode, the air conditioning controller 32 further opens the electromagnetic valve 22 and opens the auxiliary expansion valve 73 to control the valve opening degree in the heating operation state of the refrigerant circuit R shown in FIG. And Then, the circulation pump 62 of the battery temperature adjusting device 61 is operated. Thereby, a part of the refrigerant discharged from the radiator 4 is diverted on the refrigerant upstream side of the outdoor expansion valve 6 and reaches the refrigerant upstream side of the indoor expansion valve 8 through the refrigerant pipe 13F. The refrigerant then enters the branch pipe 72 and is depressurized by the auxiliary expansion valve 73, and then flows into the refrigerant flow path 64 </ b> B of the refrigerant-heat medium heat exchanger 64 through the branch pipe 72 and evaporates. At this time, an endothermic effect is exhibited. The refrigerant evaporated in the refrigerant flow path 64B is repeatedly circulated through the refrigerant pipe 74, the refrigerant pipe 13C, and the accumulator 12 and then sucked into the compressor 2 (indicated by solid arrows in FIG. 7).

  On the other hand, the heat medium discharged from the circulation pump 62 reaches the heat medium heater 66, where it is heated (when the heat medium heater 66 generates heat), and then in the heat medium pipe 68, refrigerant-heat medium heat is generated. The heat medium flow path 64A of the exchanger 64 is reached, where heat is absorbed by the refrigerant evaporated in the refrigerant flow path 64B, and the heat medium is cooled. The heat medium heated by the heat medium heater 66 and / or cooled by the endothermic action of the refrigerant leaves the refrigerant-heat medium heat exchanger 64 and reaches the battery 55, and after exchanging heat with the battery 55, The circulation sucked into the circulation pump 62 is repeated (indicated by broken line arrows in FIG. 7).

  The air conditioning controller 32 is based on the battery temperature Tb and the target battery temperature TBO detected by the battery temperature sensor 76 while constantly flowing the refrigerant through the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64 and constantly cooling the heat medium, for example. Thus, the heat generation of the heat medium heater 66 is controlled so that the battery temperature Tb becomes the target battery temperature TBO (in that case, actually, the heating / battery temperature adjustment mode is always executed instead of the heating operation). Or, the heating operation and the heating / battery temperature control mode are switched and executed). Alternatively, when the battery temperature Tb> the target battery temperature TBO + α is satisfied during the heating operation, the mode shifts to the heating / battery temperature control mode, the auxiliary expansion valve 73 is controlled to lower the battery temperature Tb, and the battery temperature Tb <target Even when the battery temperature TBO-α is reached, the heating operation is shifted to the heating / battery temperature control mode, and the heat medium heater 66 generates heat to raise the battery temperature Tb, whereby the battery temperature Tb becomes the target battery temperature TBO. To be. As described above, the air conditioning controller 32 adjusts the temperature Tb of the battery 55 to the target battery temperature TBO within the appropriate temperature range.

(7-2) Cooling / Battery Temperature Control Mode Next, when it is necessary to adjust the temperature of the battery 55 in the above-described cooling operation, the air conditioning controller 32 executes the cooling / battery temperature control mode. FIG. 8 shows the refrigerant flow (solid arrow) in the refrigerant circuit R and the heat medium flow (broken arrow) in the battery temperature adjusting device 61 in the cooling / battery temperature control mode.

  In the cooling / battery temperature control mode, the air conditioning controller 32 opens the auxiliary expansion valve 73 to control the valve opening degree in the state of the refrigerant circuit R in the cooling operation of FIG. The pump 62 is also operated to bring the refrigerant and the heat medium into heat exchange in the refrigerant-heat medium heat exchanger 64.

  As a result, the high-temperature refrigerant discharged from the compressor 2 flows into the outdoor heat exchanger 7 through the radiator 4, where it exchanges heat with the outside air and running air that is ventilated by the outdoor blower 15 to dissipate and condense. To do. A part of the refrigerant condensed in the outdoor heat exchanger 7 reaches the indoor expansion valve 8 and is decompressed there, and then flows into the heat absorber 9 and evaporates. Since the air in the air flow passage 3 is cooled by the heat absorption action at this time, the passenger compartment is cooled.

  The remainder of the refrigerant condensed in the outdoor heat exchanger 7 is diverted to the branch pipe 72, decompressed by the auxiliary expansion valve 73, and then evaporated in the refrigerant flow path 64 </ b> B of the refrigerant-heat medium heat exchanger 64. Since the refrigerant absorbs heat from the heat medium circulating in the battery temperature adjusting device 61, the battery 55 is cooled in the same manner as described above. The refrigerant from the heat absorber 9 is sucked into the compressor 2 through the refrigerant pipe 13C and the accumulator 12, and the refrigerant from the refrigerant-heat medium heat exchanger 64 is also passed from the refrigerant pipe 74 through the accumulator 12 to the compressor 2. Will be inhaled.

  In this cooling / battery temperature control mode, the air-conditioning controller 32 replaces the cooling operation, or switches between the cooling operation and the cooling / battery temperature control mode, as in the above-described heating / battery temperature control mode, or Then, the cooling / battery temperature adjustment mode is shifted to control the auxiliary expansion valve 73 and the heat medium heater 66 to adjust the temperature Tb of the battery 55 to the target battery temperature TBO within the appropriate temperature range.

(7-3) Dehumidifying and Cooling / Battery Temperature Control Mode Next, when it is necessary to adjust the temperature of the battery 55 during the above-described dehumidifying and cooling operation, the air conditioning controller 32 executes the dehumidifying cooling / battery temperature control mode. To do. The refrigerant flow (solid arrow) in the refrigerant circuit R and the heat medium flow (broken arrow) in the battery temperature adjusting device 61 in this dehumidifying cooling / battery temperature control mode are the same as those in FIG. Is controlled by opening rather than fully opening. In the same manner as in the cooling / battery temperature control mode, the air conditioning controller 32 replaces the dehumidifying cooling operation, or switches between the dehumidifying cooling operation and the dehumidifying cooling / battery temperature control mode, or switches from the dehumidifying cooling operation to the dehumidifying cooling / battery. By shifting to the temperature control mode and controlling the auxiliary expansion valve 73 and the heat medium heater 66, the temperature Tb of the battery 55 is adjusted to the target battery temperature TBO within the appropriate temperature range.

(7-4) Internal cycle / battery temperature adjustment mode Next, when it is necessary to adjust the temperature of the battery 55 in the internal cycle operation described above, the air conditioning controller 32 executes the internal cycle / battery temperature adjustment mode. . In this internal cycle / battery temperature control mode, the air conditioning controller 32 opens the auxiliary expansion valve 73 to control the valve opening degree in the state of the refrigerant circuit R in the internal cycle operation of FIG. The circulation pump 62 is also operated, so that the refrigerant and the heat medium heat exchanger 64 exchange heat between the refrigerant and the heat medium. FIG. 9 shows the refrigerant flow (solid arrow) in the refrigerant circuit R and the heat medium flow (broken arrow) in the battery temperature adjusting device 61 in the internal cycle / battery temperature control mode.

  Thereby, after the high-temperature refrigerant | coolant discharged from the compressor 2 is thermally radiated with the heat radiator 4, it will flow to the refrigerant | coolant piping 13F via the electromagnetic valve 22 all. A part of the refrigerant exiting the refrigerant pipe 13F reaches the indoor expansion valve 8 through the refrigerant pipe 13B, and is decompressed there, and then flows into the heat absorber 9 and evaporates. Since the moisture in the air blown out from the indoor blower 27 by the heat absorption action at this time condenses and adheres to the heat absorber 9, the air is cooled and dehumidified.

  The remaining refrigerant exiting the refrigerant pipe 13F is diverted to the branch pipe 72, decompressed by the auxiliary expansion valve 73, and then evaporated in the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64. Since the refrigerant absorbs heat from the heat medium circulating in the battery temperature adjusting device 61, the battery 55 is cooled in the same manner as described above. The refrigerant from the heat absorber 9 is sucked into the compressor 2 through the refrigerant pipe 13C and the accumulator 12, and the refrigerant from the refrigerant-heat medium heat exchanger 64 is also passed from the refrigerant pipe 74 through the accumulator 12 to the compressor 2. Will be inhaled.

  In this internal cycle / battery temperature adjustment mode, the air conditioning controller 32 replaces the internal cycle operation or switches between the internal cycle operation and the internal cycle / battery temperature adjustment mode, as in the heating / battery temperature adjustment mode described above. Alternatively, the temperature Tb of the battery 55 is adjusted to the target battery temperature TBO within the appropriate temperature range by shifting from the internal cycle operation to the internal cycle / battery temperature control mode and controlling the auxiliary expansion valve 73 and the heat medium heater 66. To do.

(7-5) Dehumidifying Heating / Battery Temperature Control Mode Next, when it is necessary to adjust the temperature of the battery 55 in the above-described dehumidifying heating operation, the air conditioning controller 32 executes the dehumidifying heating / battery temperature control mode. . In the dehumidifying heating / battery temperature control mode, the air conditioning controller 32 opens the auxiliary expansion valve 73 and controls the valve opening degree in the state of the refrigerant circuit R in the dehumidifying heating operation of FIG. The circulation pump 62 is also operated, so that the refrigerant and the heat medium heat exchanger 64 exchange heat between the refrigerant and the heat medium. FIG. 10 shows the refrigerant flow (solid arrow) in the refrigerant circuit R and the heat medium flow (broken arrow) in the battery temperature adjusting device 61 in the dehumidifying heating / battery temperature control mode.

  As a result, a part of the condensed refrigerant exiting the radiator 4 is diverted, and the diverted refrigerant flows into the refrigerant pipe 13F through the electromagnetic valve 22, and comes out of the refrigerant pipe 13F, and a part of the refrigerant pipe is refrigerant pipe. The refrigerant flows from 13B to the indoor expansion valve 8, and the remaining refrigerant flows to the outdoor expansion valve 6. That is, after a part of the divided refrigerant is decompressed by the indoor expansion valve 8, it flows into the heat absorber 9 and evaporates. At this time, moisture in the air blown out from the indoor blower 27 is condensed and attached to the heat absorber 9 by the heat absorption action of the refrigerant generated in the heat absorber 9, so that the air is cooled and dehumidified. Since the air dehumidified by the heat absorber 9 is reheated in the process of passing through the radiator 4, dehumidifying heating in the passenger compartment is thereby performed. In addition, the remaining condensed refrigerant from the radiator 4 is depressurized by the outdoor expansion valve 6 and then evaporated by the outdoor heat exchanger 7 to absorb heat from the outside air.

  On the other hand, the remainder of the refrigerant exiting the refrigerant pipe 13F flows into the branch pipe 72, is decompressed by the auxiliary expansion valve 73, and evaporates in the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64. Since the refrigerant absorbs heat from the heat medium circulating in the battery temperature adjusting device 61, the battery 55 is cooled in the same manner as described above. Note that the refrigerant discharged from the heat absorber 9 is sucked into the compressor 2 through the refrigerant pipe 13C and the accumulator 12, and the refrigerant discharged from the outdoor heat exchanger 7 passes through the refrigerant pipe 13D, the electromagnetic valve 21, the refrigerant pipe 13C, and the accumulator 12. Then, the refrigerant that is sucked into the compressor 2 and exits the refrigerant-heat medium heat exchanger 64 is also sucked into the compressor 2 from the refrigerant pipe 74 through the accumulator 12.

  In the dehumidifying heating / battery temperature control mode, the air conditioning controller 32 replaces the dehumidifying heating operation or switches between the dehumidifying heating operation and the dehumidifying heating / battery temperature control mode, as in the above-described heating / battery temperature control mode. Alternatively, the temperature Tb of the battery 55 is adjusted to the target battery temperature TBO within the appropriate temperature range by shifting from the dehumidifying heating operation to the dehumidifying heating / battery temperature control mode and controlling the auxiliary expansion valve 73 and the heat medium heater 66. To do.

(7-6) Battery Temperature Control Single Mode Next, a battery temperature control single mode for controlling the temperature of the battery 55 without performing air conditioning of the vehicle interior when the battery 55 is charged will be described. FIG. 11 shows the refrigerant flow (solid arrow) in the refrigerant circuit R and the heat medium flow (broken arrow) in the battery temperature adjusting device 61 in the battery temperature adjustment single mode. The air conditioning controller 32 operates the compressor 2 and also operates the outdoor fan 15. The indoor expansion valve 8 is fully closed and the auxiliary expansion valve 37 is opened to depressurize the refrigerant. The outdoor expansion valve 6 is fully opened. Further, the air conditioning controller 32 closes the electromagnetic valve 17 and the electromagnetic valve 21 and stops the indoor blower 27. Then, the circulation pump 62 is operated so that the refrigerant and the heat medium are exchanged in the refrigerant-heat medium heat exchanger 64.

  Thus, the high-temperature and high-pressure gas refrigerant discharged from the compressor 2 passes through the radiator 4 and reaches the outdoor expansion valve 6 from the refrigerant pipe 13E. At this time, since the outdoor expansion valve 6 is fully opened, the refrigerant passes through the refrigerant pipe 13J, flows into the outdoor heat exchanger 7 as it is, is cooled by the outside air ventilated by the outdoor blower 15, and is condensed and liquefied. In the case where frost has grown on the outdoor heat exchanger 7, the outdoor heat exchanger 7 is defrosted by the heat dissipation action at this time.

  The refrigerant that has exited the outdoor heat exchanger 7 enters the refrigerant pipe 13A. At this time, since the indoor expansion valve 8 is fully closed, all the refrigerant that has exited the outdoor heat exchanger 7 is supplemented via the branch pipe 72. It reaches the expansion valve 73. The refrigerant is decompressed by the auxiliary expansion valve 73 and then flows into the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64 to evaporate. At this time, an endothermic effect is exhibited. The refrigerant evaporated in the refrigerant flow path 64B is repeatedly circulated through the refrigerant pipe 74, the refrigerant pipe 13C, and the accumulator 12 in order and sucked into the compressor 2.

  On the other hand, the heat medium discharged from the circulation pump 62 is heated through the heat medium heater 66 (when the heat medium heater 66 generates heat), and the heat medium pipe 68 is filled with the refrigerant-heat medium heat exchanger 64. The heat medium channel 64A is reached, where heat is absorbed by the refrigerant evaporated in the refrigerant channel 64B, and the heat medium is cooled. The heat medium heated by the heat medium heater 66 and / or cooled by the endothermic action of the refrigerant leaves the refrigerant-heat medium heat exchanger 64 and reaches the battery 55, and after exchanging heat with the battery 55, The circulation sucked into the circulation pump 62 is repeated (indicated by broken line arrows in FIG. 11).

  The air conditioning controller 32 controls the temperature of the battery 55 (battery temperature Tb) by controlling the auxiliary expansion valve 73 and the heat medium heater 66 in this battery temperature control single mode as well as in the heating / battery temperature control mode described above. ) Is adjusted to the target battery temperature TBO within the appropriate temperature range.

(8) Pre-air-conditioning function of air-conditioning controller 32 Here, the air-conditioning controller 32 mentioned above has what is called a pre-air-conditioning function. The pre-air-conditioning function is a function that starts the vehicle at a predetermined preset pre-air-conditioning start scheduled time t1 and starts air-conditioning of the vehicle interior by the vehicle air conditioner 1. In this application, when the vehicle starts, it does not mean that the vehicle starts (runs), but that the electric vehicle is turned on (the key is turned or the start button is pressed). It means that the vehicle air conditioner 1 is also operable.

  For example, assuming that the user operates the air conditioning operation unit 53 and sets 7:00 am (AM 7:00) the next day as the scheduled pre-air conditioning start time t1, the air conditioning controller 32 sets the scheduled pre-air conditioning start time t1. At that time, the vehicle is started (the power is turned on: the power is turned on), and the air conditioning (pre-air conditioning) of the vehicle interior by the vehicle air conditioner 1 is started. Thereby, it is comprised so that the temperature in a vehicle interior can be previously set as a suitable temperature by the time which gets on a vehicle.

(9) Pre-air-conditioning battery temperature control by the air-conditioning controller 32 Next, referring to FIG. 12 (FIG. 11) and FIG. 13, the pre-air-conditioning time executed by the air-conditioning controller 32 when performing the pre-air-conditioning as described above. Battery temperature control will be described. As described above, when the pre-air conditioning start scheduled time t1 is set by the user, the air conditioning controller 32 starts the air conditioning (pre-air conditioning) in the vehicle interior by operating the vehicle air conditioner 1 at the pre-air conditioning start scheduled time t1. However, when the pre-air-conditioning start scheduled time t1 is set, the air-conditioning controller 32, in the embodiment, for a predetermined time (for example, 30 minutes) before the predetermined pre-air-conditioning start time t1 (for example, 30 minutes). The temperature of the battery 55 (battery temperature Tb) detected by the battery temperature sensor 76 is taken every 5 minutes), and whether or not the battery temperature Tb is lower than the aforementioned allowable lower limit temperature TL (0 ° C.). It is judged whether or not the temperature is higher than TH (+ 40 ° C.).

(9-1) Battery Heating Mode in Pre-Air Conditioning Battery Temperature Control Control Here, as described above, when pre-air conditioning in the vehicle interior is started at a very low temperature, the current that can be output by the battery 55 becomes low. The battery 55 will deteriorate due to the power demand. Therefore, the air conditioning controller 32 determines the temperature of the battery 55 (battery temperature Tb) before the pre-air conditioning start scheduled time t1, and if this battery temperature Tb is lower than the aforementioned allowable lower limit temperature TL (0 ° C.), The air conditioning battery temperature control is executed, and the battery heating mode in the pre-air conditioning battery temperature control is started.

  Further, the air conditioning controller 32 of the embodiment starts the battery heating mode in the pre-air-conditioning battery temperature control from an earlier time point as the battery temperature Tb is lower than the allowable lower limit temperature TL and the difference ΔT is larger. This will be described with reference to FIG. For example, when the battery temperature Tb is lower than the allowable lower limit temperature TL 30 minutes before the pre-air-conditioning start scheduled time t1, and the difference ΔT = TL−Tb is a predetermined small difference ΔT1 (for example, 5 deg), The air conditioning controller 32 does not start the battery heating mode of the pre-air-conditioning battery temperature control at the time 30 minutes before.

  If the air conditioning controller 32 reaches the time t2, for example, 10 minutes before the pre-air conditioning start scheduled time t1 in the state as it is, the air conditioning controller 32 starts the battery heating mode of the battery temperature control during pre-air conditioning. That is, the time t2 (AM6: 50) 10 minutes before this time is the start time of the pre-air-conditioning battery temperature control.

  On the other hand, if the difference ΔT (= TL−Tb) between the battery temperature Tb and the allowable lower limit temperature TL is a predetermined large difference ΔT2 (for example, 15 deg) 30 minutes before the scheduled pre-air conditioning start time t1, the air conditioning The controller 32 starts the battery heating mode of the pre-air-conditioning battery temperature control at a time point 30 minutes before. Accordingly, in this case, the time t2 (AM6: 30) 30 minutes before is the start time of the pre-air-conditioning battery temperature control.

  In the battery heating mode in the pre-air conditioning battery temperature control, the air conditioning controller 32 opens the first switch 81 and closes the second switch 82 as shown in FIG. As a result, power is not supplied to the electrical equipment of the refrigerant circuit R including the compressor 2, and air conditioning in the passenger compartment is prohibited. On the other hand, the electric equipment of the battery temperature adjusting device 61 including the heat medium heater 66 can be supplied with power.

  Then, the air conditioning controller 32 operates the circulation pump 62 of the battery temperature adjusting device 61 and energizes the heat medium heater 66 to generate heat. Thereby, the heat medium discharged from the circulation pump 62 reaches the heat medium heater 66, and after being heated there, reaches the heat medium flow path 64 </ b> A of the refrigerant-heat medium heat exchanger 64 through the heat medium pipe 68. The battery 55 passes through the battery 55. Since the battery 55 is heated by the heat medium heated by the heat medium heater 66, the battery temperature Tb rises as shown in FIG.

  In this case, when the difference ΔT is a small difference ΔT1, the battery temperature Tb immediately starts increasing at a predetermined rate as the battery heating mode starts, but when the difference ΔT is a large difference ΔT2, After the heating mode is started, the battery temperature Tb gradually increases at the beginning, or hardly increases, and after a few minutes, increases at the same increase rate as in the case of the difference ΔT1. FIG. 13 expresses such a situation. Then, the heat medium after heat exchange with the battery 55 repeats circulation (represented by broken line arrows in FIG. 12) that is sucked into the circulation pump 62 again.

  When the temperature of the battery 55 (battery temperature Tb) rises in the battery heating mode in such pre-air-conditioning battery temperature control, and becomes equal to or higher than the above-described allowable lower limit temperature TL, the air conditioning controller 32 displays the first switch in FIG. 81 is closed so that electric power can be supplied to the electric equipment of the refrigerant circuit R such as the compressor 2, and thereafter, the battery temperature Tb is within the appropriate temperature range as described above until the pre-air conditioning start scheduled time t1. Adjust to.

  When the time reaches the pre-air conditioning start scheduled time t1, the air conditioning controller 32 starts air conditioning in the vehicle interior, and the heating operation in FIG. 3, the dehumidifying heating operation in FIG. 4, the internal cycle operation in FIG. 6 is performed, or the heating / battery temperature adjustment mode of FIG. 7, the dehumidification cooling / battery temperature adjustment mode (cooling / battery temperature adjustment mode) of FIG. 8, and the internal cycle / battery of FIG. The battery temperature Tb is maintained at the target battery temperature TBO equal to or higher than the allowable lower limit temperature TL while the vehicle interior is air-conditioned in the temperature adjustment mode, the dehumidifying heating / battery temperature adjustment mode of FIG. 10, or the battery temperature adjustment single mode of FIG. Thus, the battery temperature Tb is maintained at the target battery temperature TBO.

  The above-described pre-air-conditioning battery temperature adjustment control start time t2 is a time when the temperature of the battery 55 becomes equal to or higher than the allowable lower limit temperature TL by the pre-air-conditioning start scheduled time t1, and is previously experimentally related to the difference ΔT. It is calculated and stored in the air conditioning controller 32.

  Thus, when the temperature of the battery 55 (battery temperature Tb) is lower than the predetermined allowable lower limit temperature TL, the air conditioning controller 32 heats the battery 55 before the pre-air conditioning start scheduled time t1, and the battery temperature Tb is allowed. When the temperature rises above the lower limit temperature TL, pre-air-conditioning battery temperature control is started to start air-conditioning in the vehicle interior. Therefore, the temperature of the battery 55 is low when pre-air-conditioning in the vehicle interior is executed, Under such circumstances, the battery 55 can be heated before the pre-air conditioning is started.

  And since the air conditioning controller 32 starts the air conditioning of the vehicle interior after the temperature of the battery 55 rises above the allowable lower limit temperature TL, it becomes possible to prevent the deterioration of the battery 55 when pre-air conditioning the vehicle interior, While improving the durability, it is possible to smoothly perform pre-air conditioning in the passenger compartment.

  In the embodiment, when the pre-air conditioning start scheduled time t1 is set, the air conditioning controller 32 determines the temperature of the battery 55 before the scheduled pre-air conditioning start time t1, and the temperature of the battery 55 is the allowable lower limit temperature. If it is lower than TL, the battery temperature adjustment control during pre-air conditioning is executed, so that the battery temperature adjustment before pre-air conditioning can be realized smoothly.

  In particular, in the embodiment, the air conditioning controller 32 determines the temperature of the battery 55 every predetermined time (every 5 minutes in the embodiment) from a predetermined time (30 minutes in the embodiment) before the scheduled pre-air conditioning start time t1. As the temperature of the battery 55 is lower than the allowable lower limit temperature TL and the difference ΔT is larger, the battery heating mode of the pre-air conditioning battery temperature control is started from an earlier time point. Can be set to the allowable lower limit temperature TL or more without hindrance.

  In this case, in the embodiment, the time when the temperature of the battery 55 becomes equal to or higher than the allowable lower limit temperature TL by the pre-air conditioning start scheduled time t1 is set in advance as the time t2 when the pre-air conditioning battery temperature control is started. Therefore, the temperature of the battery 55 can be reliably set to be equal to or higher than the allowable lower limit temperature TL at the pre-air conditioning start scheduled time t1.

  Then, as in the embodiment, the vehicle air conditioner 1 includes a compressor 2 that compresses the refrigerant, a radiator 4 that radiates the refrigerant and heats the air that is supplied to the vehicle interior, and absorbs the refrigerant into the vehicle interior. A heat absorber 9 that cools the air to be supplied, an outdoor heat exchanger 7 that is provided outside the passenger compartment to absorb or dissipate the refrigerant, and a battery that adjusts the temperature of the battery 55 by circulating a heat medium in the battery 55. The battery temperature adjusting device 61 includes a refrigerant-heat medium heat exchanger 64 that exchanges heat between the refrigerant and the heat medium, a heat medium heater 66 that heats the heat medium, and an air conditioning controller. 32 performs the pre-air-conditioning battery temperature adjustment control using the temperature of the battery 55 itself or the temperature of the heat medium as the temperature of the battery 55, so that the above control can be realized smoothly. So as to.

(9-2) Battery Cooling Mode in Pre-Air Conditioning Battery Temperature Control Control Further, as described above, when the outside air temperature is a high temperature environment, the temperature of the battery 55 becomes extremely high, so the battery 55 is discharged even in such a state. Doing so will adversely affect the durability of the battery 55 itself.

  Therefore, the air conditioning controller 32 determines the temperature of the battery 55 (battery temperature Tb) before the pre-air conditioning scheduled start time t1, and if this battery temperature Tb is higher than the above-described allowable upper limit temperature TH (+ 40 ° C.), The air-conditioning battery temperature control is executed, and the battery cooling mode in the pre-air-conditioning battery temperature control is started.

  Also in this case, the air-conditioning controller 32 increases the battery temperature Tb during pre-air conditioning from the earlier time point (also the battery temperature regulation start time t2 during pre-air conditioning) as the battery temperature Tb is higher than the allowable upper limit temperature TH and the difference ΔT is larger. The battery cooling mode in the control is started. However, the difference ΔT in this case is Tb−TH.

  Also in this case, the air conditioning controller 32 determines the temperature of the battery 55 every predetermined time (every 5 minutes) from a predetermined time (30 minutes before) the pre-air conditioning start scheduled time t1, and the temperature of the battery 55 is allowed. As the difference ΔT is higher than the upper limit temperature TH, the battery cooling mode of the pre-air-conditioning battery temperature adjustment control is started earlier.

  Also in this case, the pre-air-conditioning battery temperature adjustment control start time t2 is an experiment in advance regarding the time when the temperature of the battery 55 becomes equal to or lower than the allowable upper limit temperature TH by the pre-air-conditioning start scheduled time t1, in relation to the above-described difference ΔT. And stored in the air conditioning controller 32.

  The flow of the refrigerant and the heat medium in the battery cooling mode in the pre-air-conditioning battery temperature control is the same as that in the battery temperature control single mode of FIG. 11 described above. However, the heat medium heater 66 is not energized. That is, the air-conditioning controller 32 closes the first switch 81 and the second switch 82 so that electric power can be supplied to the electric device of the refrigerant circuit R including the compressor 2 and the electric device of the battery temperature adjusting device 61. And the compressor 2 is drive | operated and the outdoor air blower 15 is also drive | operated. The indoor expansion valve 8 is fully closed and the auxiliary expansion valve 37 is opened to depressurize the refrigerant. The outdoor expansion valve 6 is fully opened. Further, the air conditioning controller 32 closes the electromagnetic valve 17 and the electromagnetic valve 21 and stops the indoor blower 27. As a result, air conditioning in the passenger compartment is prohibited. Then, the circulation pump 62 is operated so that the refrigerant and the heat medium are exchanged in the refrigerant-heat medium heat exchanger 64.

  Thus, the high-temperature and high-pressure gas refrigerant discharged from the compressor 2 passes through the radiator 4 and reaches the outdoor expansion valve 6 from the refrigerant pipe 13E. At this time, since the outdoor expansion valve 6 is fully opened, the refrigerant passes through the refrigerant pipe 13J, flows into the outdoor heat exchanger 7 as it is, is cooled by the outside air ventilated by the outdoor blower 15, and is condensed and liquefied.

  The refrigerant that has exited the outdoor heat exchanger 7 enters the refrigerant pipe 13A. At this time, since the indoor expansion valve 8 is fully closed, all the refrigerant that has exited the outdoor heat exchanger 7 is supplemented via the branch pipe 72. It reaches the expansion valve 73. The refrigerant is decompressed by the auxiliary expansion valve 73 and then flows into the refrigerant flow path 64B of the refrigerant-heat medium heat exchanger 64 to evaporate. At this time, an endothermic effect is exhibited. The refrigerant evaporated in the refrigerant flow path 64B is repeatedly circulated through the refrigerant pipe 74, the refrigerant pipe 13C, and the accumulator 12 in order and sucked into the compressor 2.

  On the other hand, the heat medium discharged from the circulation pump 62 passes through the heat medium heater 66 and reaches the heat medium flow path 64A of the refrigerant-heat medium heat exchanger 64 through the heat medium pipe 68, where the refrigerant flow path 64B. Heat is absorbed by the refrigerant evaporating inside, and the heat medium is cooled. The heat medium cooled by the heat absorption action of the refrigerant exits the refrigerant-heat medium heat exchanger 64 and reaches the battery 55, and after being cooled by exchanging heat with the battery 55, the circulation sucked into the circulation pump 62 is repeated. (Dotted line arrow in FIG. 11).

  When the temperature of the battery 55 (battery temperature Tb) decreases in the battery cooling mode in such pre-air-conditioning battery temperature control, and falls below the above-described allowable upper limit temperature TH, the air-conditioning controller 32 is scheduled to start pre-air-conditioning thereafter. Until time t1, the battery temperature Tb is adjusted to the target battery temperature TBO within the appropriate temperature range as described above. When the time reaches the pre-air conditioning start scheduled time t1, the air conditioning controller 32 starts air conditioning in the vehicle interior, and the heating operation in FIG. 3, the dehumidifying heating operation in FIG. 4, the internal cycle operation in FIG. 6 is performed, or the heating / battery temperature adjustment mode of FIG. 7, the dehumidification cooling / battery temperature adjustment mode (cooling / battery temperature adjustment mode) of FIG. 8, and the internal cycle / battery of FIG. The battery temperature Tb is maintained at the target battery temperature TBO equal to or higher than the allowable lower limit temperature TL while the vehicle interior is air-conditioned in the temperature adjustment mode, the dehumidifying heating / battery temperature adjustment mode of FIG. 10, or the battery temperature adjustment single mode of FIG. Thus, the battery temperature Tb is maintained at the target battery temperature TBO.

  As described above, when the temperature of the battery 55 is higher than the predetermined allowable upper limit temperature, the air conditioning controller 32 cools the battery 55 before the pre-air conditioning start scheduled time t1, and the temperature of the battery 55 decreases below the allowable upper limit temperature TH. In this case, the battery cooling mode of the battery temperature adjustment control at the time of pre-air conditioning for starting the air conditioning of the vehicle interior is executed. Therefore, when the temperature of the battery 55 is high when executing the pre air conditioning of the vehicle interior, the pre air conditioning is started. The battery 55 can be cooled before starting.

  Since the air conditioning controller 32 starts air conditioning in the vehicle interior after the temperature of the battery 55 falls below the allowable upper limit temperature TH, similarly, the battery 55 is prevented from deteriorating when pre-air conditioning is performed in the vehicle interior, and its durability is improved. As a result, the pre-air conditioning in the passenger compartment can be performed smoothly.

  Similarly, in the embodiment, when the pre-air conditioning start scheduled time t1 is set, the air conditioning controller 32 determines the temperature of the battery 55 before the scheduled pre air conditioning start scheduled time t1, and the temperature of the battery 55 is allowed. When the temperature is higher than the upper limit temperature TH, the battery cooling mode of the pre-air-conditioning battery temperature control is executed, so that the battery temperature control before the pre-air-conditioning can be realized smoothly.

  In this case as well, in this embodiment, the air conditioning controller 32 determines the temperature of the battery 55 every predetermined time (every 5 minutes) from a predetermined time before (30 minutes before) the pre-air conditioning start scheduled time t1. As the temperature is higher than the allowable upper limit temperature TH and the difference ΔT is larger, the battery cooling mode of the pre-air-conditioning battery temperature control is started from an earlier time point. Therefore, the temperature of the battery 55 is not affected at the pre-air-conditioning start scheduled time t1. The allowable upper limit temperature TH can be kept below.

  Also in this case, in this embodiment, the air conditioning controller 32 has a time point when the temperature of the battery 55 becomes equal to or lower than the allowable upper limit temperature TH by the pre-air conditioning start scheduled time t1 as the time point t2 when the pre-air conditioning battery temperature control is started. Since it is set in advance, the temperature of the battery 55 can be surely set to the allowable upper limit temperature TH or less at the pre-air conditioning start scheduled time t1.

  In the embodiment, the air conditioning controller 32 executes both the battery heating mode and the battery cooling mode in the pre-air-conditioning battery temperature adjustment control. In the invention of claim 3, only the battery cooling mode may be executed. Further, the configuration of the control unit 30 of the vehicle control system VC including the air conditioning controller 32 described in the above embodiment, the configuration of the refrigerant circuit R of the vehicle air conditioner 1 and the battery temperature adjustment device 61 are not limited thereto. Needless to say, changes can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Compressor 4 Radiator 6 Outdoor expansion valve 7 Outdoor heat exchanger 8 Indoor expansion valve 9 Heat absorber 21, 22 Solenoid valve 32 Air-conditioning controller (control device)
55 Battery 61 Battery temperature adjusting device 62 Circulation pump 64 Refrigerant-heat medium heat exchanger 66 Heat medium heater (heating device)
72 Branch piping (branch circuit)
73 Auxiliary expansion valve 81 First switch 82 Second switch

Claims (7)

A vehicle air conditioner that is powered by a battery to air-condition the vehicle interior and adjusts the temperature of the battery,
A control device having a pre-air-conditioning function for starting air-conditioning in the vehicle interior at a predetermined pre-air-conditioning start scheduled time set in advance;
When the temperature of the battery is lower than a predetermined allowable lower limit temperature, the control device heats the battery before the pre-air-conditioning start scheduled time, and when the temperature of the battery rises above the allowable lower limit temperature, A vehicle air conditioner that performs pre-air-conditioning battery temperature control that starts air conditioning in a vehicle interior.   In the pre-air conditioning battery temperature adjustment control, the control device cools the battery before the pre-air conditioning start scheduled time when the temperature of the battery is higher than a predetermined allowable upper limit temperature, and the temperature of the battery is The vehicle air conditioner according to claim 1, wherein air conditioning of the vehicle interior is started when the temperature falls below an allowable upper limit temperature. A vehicle air conditioner that is powered by a battery to air-condition the vehicle interior and adjusts the temperature of the battery,
A control device having a pre-air-conditioning function for starting air-conditioning in the vehicle interior at a predetermined pre-air-conditioning start scheduled time set in advance;
When the temperature of the battery is higher than a predetermined allowable upper limit temperature, the control device cools the battery before the pre-air conditioning start scheduled time, and when the temperature of the battery decreases below the allowable upper limit temperature, A vehicle air conditioner that performs pre-air-conditioning battery temperature control that starts air conditioning in a vehicle interior.   When the pre-air conditioning start scheduled time is set, the control device determines the temperature of the battery at a time before the pre air conditioning start scheduled time, and when the temperature of the battery is lower than the allowable lower limit temperature, or 4. The vehicle air conditioner according to claim 1, wherein when the temperature of the battery is higher than the allowable upper limit temperature, the pre-air-conditioning battery temperature adjustment control is executed. 5. .   The control device determines the temperature of the battery every predetermined time from a predetermined time before the pre-air-conditioning start scheduled time, and the temperature of the battery is lower than the allowable lower limit temperature and the difference is larger, or the battery 5. The vehicle air conditioner according to claim 4, wherein the pre-air-conditioning battery temperature control is started from an earlier time point as the temperature of the vehicle is higher than the allowable upper limit temperature and the difference is larger.   The time when the control device starts the pre-air-conditioning battery temperature control is the time when the temperature of the battery becomes equal to or higher than the allowable lower limit temperature or the allowable upper limit temperature before the pre-air-conditioning start scheduled time. The vehicle air conditioner according to claim 5, wherein A compressor for compressing the refrigerant;
A heat radiator that radiates the refrigerant and heats the air supplied to the vehicle interior;
A heat absorber that absorbs heat of the refrigerant and cools the air supplied to the vehicle interior;
An outdoor heat exchanger that is provided outside the passenger compartment to absorb heat or dissipate the refrigerant;
A battery temperature adjusting device for adjusting the temperature of the battery by circulating a heat medium in the battery;
The battery temperature adjusting device includes a refrigerant-heat medium heat exchanger that exchanges heat between the refrigerant and the heat medium, and a heating device that heats the heat medium.
The said control apparatus performs the battery temperature adjustment control at the time of the said pre air conditioning by using the temperature of the said battery itself, or the temperature of the said heat medium as the temperature of the said battery, Of Claim 1 thru | or 6 characterized by the above-mentioned. The vehicle air conditioning apparatus according to any one of the above.

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