Temperature control system and temperature control method for vehicle

Abstract

The invention relates to an improvement in defrosting operation of a vehicle temperature control system with a heat medium circuit. A heat medium circuit of a temperature control system for a vehicle includes a high-pressure-side heat exchanger, a low-pressure-side heat exchanger, a low-pressure-side bypass path, an outdoor heat exchanger, an outdoor heat exchanger bypass path, and a temperature control device. The temperature control system includes: a heat pump mode in which a first circuit and a second circuit are formed; a compressor heat source mode in which a first continuous flow path in which a heat medium circulates through bypass paths of the high-pressure-side heat exchanger, the temperature control device, the low-pressure-side heat exchanger, and the outdoor heat exchanger is formed; and a stored heat utilization defrosting mode in which a second continuous flow path is formed in which the heat medium circulates in the outdoor heat exchanger and at least one of the high-pressure-side heat exchanger, the temperature control device, the low-pressure-side heat exchanger, and the low-pressure-side bypass path. The operation mode is switched from the heat pump mode or the compressor heat source mode to the stored heat utilization defrosting mode when switching information relating to a state in which the vehicle is traveling or traveling is stopped satisfies a predetermined switching condition.

Description

Technical Field

[0001] The invention relates to a temperature control system assembled on a vehicle and a temperature control method using the temperature control system. Background Art

[0002] In electric vehicles and hybrid vehicles that obtain driving force for the vehicle from engines and motors, when the heat source is easily insufficient, in addition to the air conditioning functions required by the vehicle, such as heating and cooling, dehumidification, and ventilation, thermal management and waste heat utilization of vehicle-mounted equipment such as batteries are required. In response to such requirements, in addition to heat pump systems, multiple systems have been used, such as systems including a cooler for cooling the battery and a heater for heating the battery, or systems that use a pump to transport water heated by waste heat from a radiator to an indoor air conditioning unit.

[0003] As a vehicle thermal management system, a system including a primary circuit in which a refrigerant circulates according to a refrigeration cycle and a secondary circuit in which a heat medium (water, etc.) is pumped to an indoor air conditioning unit has been proposed (for example, Patent Document 1).

[0004] The refrigeration cycle device described in Patent Document 1 includes a first heating medium circuit including an evaporator and a radiator of a refrigerant circuit, and a second heating medium circuit including a condenser of the refrigerant circuit, an electric heater, and a heater core of a machine room air conditioning unit. In the non-communication mode in which the first heating medium circuit and the second heating medium circuit are not communicated with each other, the heating medium heated by the electric heater and the condenser is introduced into the heater core, thereby heating the machine room.

[0005] In Patent Document 1, whether frost is attached to the radiator is determined based on the vehicle's running speed, the temperature of the low-temperature-side heating medium, the pressure of the low-pressure side of the refrigerant, etc. If frost is determined to be attached, the first heating medium circuit and the second heating medium circuit are connected to each other through a connecting flow path. In this connection mode, the heat medium flows in parallel in the condenser and the heater core through a pump provided in the connection flow path, and flows in parallel in the evaporator and the radiator. In the connection mode, the heat medium heated by the electric heater and the condenser is introduced into the radiator, thereby defrosting the radiator. When the defrosting operation is started, if the temperature of the heating medium introduced into the radiator is lower than the temperature required for defrosting, the temperature of the heating medium on the high temperature side is raised by, for example, increasing the rotation speed of the compressor. Previous technical literature Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2015-007491 Summary of the invention Technical issues to be solved by the invention

[0007] In Patent Document 1, an electric heater is used to reliably defrost the radiator by raising the temperature of the heating medium to a temperature sufficient for defrosting even when the rotation speed of the compressor is increased. This is necessary because defrosting must be performed forcibly regardless of the vehicle's running speed. Even if defrosting is performed while the vehicle is running at high speed, the heat of the heating medium is used for heat exchange with the outside air, so it is difficult to melt the frost and the heating efficiency is reduced. An object of the present invention is to improve the defrosting operation of a vehicle temperature control system having a heating medium circuit. Means for solving technical problems

[0008] The temperature control system involved in the present invention comprises: a refrigerant circuit, including a compressor, a high-pressure side heat exchanger, a pressure reducing part and a low-pressure side heat exchanger, configured so that the refrigerant can circulate according to a refrigeration cycle; and a heat medium circuit, configured so that the heat medium that performs heat exchange with the refrigerant can circulate. The heat carrier circuit includes: a high-pressure side heat exchanger for heat exchange between the refrigerant and the heat carrier; a low-pressure side heat exchanger for heat exchange between the refrigerant and the heat carrier; a low-pressure side bypass path for the heat carrier to bypass the low-pressure side heat exchanger; a first pump and a second pump configured to pressurize the heat carrier; an outdoor heat exchanger for heat exchange between the outside air and the heat carrier; an outdoor heat exchanger bypass path for the heat carrier to bypass the outdoor heat exchanger; and a temperature control device that is heated or cooled by the heat carrier, or is used to heat or cool the temperature control object. The control device includes a refrigeration system, wherein the refrigeration system includes the following operation modes: a heat pump mode, forming a first circuit in which a heat medium circulates through a low-pressure side heat exchanger and an outdoor heat exchanger through a first pump, and a second circuit in which a heat medium circulates through a high-pressure side heat exchanger and a temperature control device through a second pump; a compressor heat source mode, forming a first continuous flow path in which a heat medium circulates through at least one of the first pump and the second pump through the high-pressure side heat exchanger, the temperature control device, the low-pressure side heat exchanger, and a bypass path of the outdoor heat exchanger; a heat storage and defrosting mode, forming a second continuous flow path in which a heat medium circulates through at least one of the first pump and the second pump through the high-pressure side heat exchanger, the temperature control device, the low-pressure side heat exchanger and at least one of the low-pressure side bypass path, and the outdoor heat exchanger; and a control device, wherein the control device is configured such that if switching information related to a state of driving or stopping of a vehicle equipped with a temperature control system meets a prescribed switching condition, the operation mode is switched from the heat pump mode or the compressor heat source mode to the heat storage and defrosting mode.

[0009] The present invention can also be applied to a temperature control method for a vehicle. Effects of the Invention

[0010] According to the present invention, when the switching information related to the driving or stopping state of the vehicle meets the prescribed switching conditions, the operating mode is switched from the heat pump mode or the compressor heat source mode to the heat storage and defrosting mode, thereby suppressing the influence of the vehicle driving on the defrosting efficiency and efficiently removing frost from the outdoor heat exchanger by utilizing the heat stored in the heating element before the mode switching. Furthermore, according to the heat storage utilizing defrosting mode, except when the compressor is stopped, the required heating capacity can be ensured by operating the compressor as a heat source while supplying a heating medium to the outdoor heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 1 is a circuit diagram (heat pump mode) showing a vehicle temperature control system according to an embodiment of the present invention. Figure 2 (a) is a block diagram showing the hardware configuration of the control device. Figure 2 (b) is a block diagram showing modules of a computer program for controlling the device. Figure 3 It is shown Figure 1 A diagram of the system operating in heater mode. Figure 4 It is shown Figure 1 A diagram showing the operating state of the system in the thermal storage defrost mode. Figure 5 1 is a circuit diagram showing a vehicle temperature control system according to a modified example of the present invention (heat storage utilizing defrost mode). DETAILED DESCRIPTION

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. [Implementation Method] Figure 1 The vehicle temperature control system 1 shown is installed in, for example, a vehicle (not shown), such as an electric vehicle that does not have an engine and obtains vehicle driving force from a running electric motor, or a so-called hybrid vehicle that obtains vehicle driving force from an engine and a motor. The temperature control system 1 is responsible for the heat management and waste heat recovery of vehicle-mounted devices such as the battery device 6 (power supply device), the driving motor, and heat-generating electronic devices installed in the vehicle, in addition to the air conditioning functions such as cooling and heating, dehumidification, and ventilation of the cabin 8 where passengers are sitting. The actions of adjusting to an appropriate temperature or humidity, or managing the vehicle-mounted devices to an appropriate temperature are collectively referred to as "thermal management". The electric power stored in the vehicle-mounted battery device 6 is supplied to the vehicle-mounted temperature control system 1 and other electric devices or electronic devices included in the vehicle-mounted devices. The vehicle-mounted battery device 6 is charged from an external power supply when the vehicle is stopped.

[0013] 〔Overall structure〕 The temperature control system 1 comprises: a refrigerant circuit 10, which is configured to allow the refrigerant to circulate; a heat medium circuit 20, which is configured to allow the heat medium that performs heat exchange with the refrigerant to circulate; and a control device 5, which sets the temperature control system 1 to a specified operating mode and controls the operating state of the temperature control system 1 according to the operating mode. In addition, the temperature control system 1 includes sensors such as an outside air temperature sensor 61 for detecting outside air temperature, a temperature sensor 62 for detecting the temperature of a heating medium, a temperature sensor 63 for detecting the temperature of a refrigerant, and a pressure sensor 64 for detecting the pressure of a refrigerant.

[0014] The temperature control system 1 has a plurality of operation modes selected by the occupant or the control device 5. The present embodiment exemplifies the heat pump mode HP ( Figure 1 ), Heater Mode HT( Figure 3 ) and heat storage defrosting mode HS( Figure 4 ).

[0015] 〔Refrigerant circuit structure〕 like Figure 1 As shown in an example of the configuration in FIG. 1 , the refrigerant circuit 10 includes a compressor 11, a condenser 12, an expansion valve 13, and an evaporator 14. In the refrigerant circuit 10, the refrigerant circulates according to a refrigeration cycle. As the refrigerant sealed in the refrigerant circuit 10, a known appropriate single refrigerant or mixed refrigerant can be used. For example, as the refrigerant of this embodiment, HFC (Hydro Fluoro Carbon: hydrofluorocarbon) refrigerants such as R410A and R32, HFO (Hydro Fluoro Olefin: hydrofluoroolefin) refrigerants such as R1234ze and R1234yf, or hydrocarbon (HC: Hydrocarbon: hydrocarbon) refrigerants such as propane and isobutane can be used. In particular, as the refrigerant of this embodiment, R1234yf is preferably used.

[0016] When the above-mentioned fluorine-based or hydrocarbon-based refrigerants are used, a subcritical refrigeration cycle is constructed in which the refrigerant pressure on the high-pressure side does not exceed the critical pressure of the refrigerant. When carbon dioxide (CO2) is used as the refrigerant, a transition critical refrigeration cycle is formed in which the refrigerant pressure on the high-pressure side exceeds the critical pressure of the refrigerant. Even in this case, the following effect can be obtained, that is, the refrigerant dissipates heat through the high-pressure side heat exchanger as in the condenser 12 of the present embodiment, and the refrigerant absorbs heat through the low-pressure side heat exchanger as in the evaporator 14 of the present embodiment, so a refrigerant that forms a transition critical refrigeration cycle such as the carbon dioxide refrigerant can also be adopted in the refrigerant circuit 10.

[0017] The compressor 11 corresponds to an electric compressor provided with a motor (not shown). The compressor 11 adiabatically compresses the refrigerant sucked into a casing (not shown) by a compression mechanism and discharges the refrigerant.

[0018] The condenser 12 exchanges heat between the refrigerant gas discharged from the compressor 11 and a heating medium. The expansion valve 13 (decompression unit) adiabatically expands the refrigerant flowing out of the condenser 12 by decompressing the refrigerant. As the expansion valve 13, a temperature-type expansion valve can be used in addition to an electronic expansion valve whose opening can be controlled according to a command from the control device 5. Alternatively, a capillary tube can be used instead of the expansion valve 13.

[0019] The evaporator 14 exchanges heat between the refrigerant flowing out of the expansion valve 13 and a heating medium. The refrigerant evaporated by the evaporator 14 is sucked into the compressor 11. An accumulator (gas-liquid separator) (not shown) may be provided between the evaporator 14 and the compressor 11 .

[0020] A relatively high refrigerant pressure (high pressure) is applied to the condenser 12, and a relatively low refrigerant pressure (low pressure) is applied to the evaporator 14. The refrigerant circulates in the refrigerant circuit 10 based on the pressure difference between the high pressure and the low pressure. exist Figure 1 In FIG. 1 , the flow of the refrigerant on the low-pressure side is indicated by a thick solid line, and the flow of the refrigerant on the high-pressure side is indicated by a thick dotted line. The same applies to the other figures.

[0021] 〔Structure of the heat carrier circuit〕 The heat medium circuit 20 is configured so that a heat medium capable of exchanging heat with the refrigerant can circulate through the condenser 12 and the evaporator 14. The heat medium is used to cool or heat at least one temperature control object. The temperature control object in this embodiment corresponds to the air in the machine room 8 and the battery device 6. The heat medium sealed in the heat medium pipe 20 is a liquid such as water or salt water that is maintained in a liquid phase and circulated in the heat medium pipe 20. Examples of the salt water include a mixed liquid of water and propylene glycol or a mixed liquid of water and ethylene glycol.

[0022] like Figure 1 As shown in an example of the structure, the heat carrier circuit 20 includes a condenser 12, an evaporator 14, a first pump 21 and a second pump 22, an outdoor heat exchanger 23, an outdoor heat exchanger bypass path 24, a first indoor heat exchanger 25-1 and a second indoor heat exchanger 25-2 both serving as indoor heat exchangers, a battery device 6, and a first switching valve 31, a second switching valve 32 and a third switching valve 33 serving as multiple flow path switching valves.

[0023] exist Figure 1 , Figure 3 and Figure 4 In the example shown, due to the flow rate adjustment by the condenser flow rate adjustment valve 12V, the entire amount of the heating medium flowing from the first switching valve 31 toward the condenser 12 does not flow into the condenser bypass path 12A but flows into the condenser 12 . And, in Figure 1 and Figure 3 In the example shown, due to the flow rate adjustment by the evaporator flow rate adjustment valve 14V, the entire amount of the heating medium flowing from the first switching valve 31 toward the evaporator 14 flows into the evaporator 14 without flowing into the evaporator bypass path 14A.

[0024] The first pump 21 and the second pump 22 are both equivalent to electric pumps driven by a motor not shown. The first pump 21 presses the heat medium by sucking and discharging the heat medium flowing out of at least one of the evaporator 14 and the evaporator bypass path 14A. The second pump 22 presses the heat medium by sucking and discharging the heat medium flowing out of at least one of the condenser 12 and the condenser bypass path 12A.

[0025] The first pump 21 and the second pump 22 are preferably configured such that the rotation speed of the mechanism for pressure-feeding the heating medium can be varied by a drive circuit portion for applying a drive current to the motor.

[0026] The outdoor heat exchanger 23 exchanges heat between the outside air outside the machine room 8 and the heat medium. The outdoor heat exchanger 23 is equivalent to a radiator arranged near the air inlet of the vehicle, for example. The outside air supplied to the outdoor heat exchanger 23 by the running of the vehicle and the operation of the outdoor blower 23A dissipates or absorbs heat according to the temperature difference between the outside air and the heat medium.

[0027] The outdoor heat exchanger bypass path 24 allows the heating medium to bypass the outdoor heat exchanger 23. The outdoor heat exchanger 23 is used in a heater mode HT described later.

[0028] The first and second indoor heat exchangers 25 - 1 and 25 - 2 exchange heat between the air sent by the indoor blower 25A and the heating medium, thereby supplying conditioned air into the machine room 8 . The indoor air-sending fan 25A is driven by a motor to blow the air in the machine room 8 (inside air) or outside air, or a mixed gas of the inside air and the outside air toward the indoor heat exchanger 25 .

[0029] The temperature control system 1 includes two indoor heat exchangers 25-1 and 25-2 arranged in series with respect to the flow of air sent by the indoor blower 25A to perform a dehumidification and heating mode (not shown). The first indoor heat exchanger 25-1 is arranged upstream of the air flow, and the second indoor heat exchanger 25-2 is arranged downstream of the air flow. In the dehumidification and heating mode, the relatively low-temperature heating medium flowing out of the evaporator 14 is supplied to the first indoor heat exchanger 25 - 1 , and the relatively high-temperature heating medium flowing out of the condenser 12 is supplied to the second indoor heat exchanger 25 - 2 .

[0030] The HVAC (Heating, Ventilation, and Air Conditioning) unit U is constructed to include a first indoor heat exchanger 25-1, a second indoor heat exchanger 25-2, an indoor blower 25A, an unillustrated duct for the flow of air transported by the indoor blower 25A, and an unillustrated damper for adjusting the flow rate of air flowing into the second indoor heat exchanger 25-2.

[0031] Although not specifically shown in the drawings, the battery device 6 includes a battery body as a battery, and a battery heat exchanger or a heat dissipating member provided in the battery body as necessary. The heating medium circuit 20 includes heat exchange paths 414 and 415 configured to enable the battery device 6 and the heating medium to exchange heat directly or indirectly via air or the like, and battery switching valves 34 and 35 as four-way valves that switch between opening and closing corresponding to the heat exchange paths 414 and 415, respectively.

[0032] The heating medium circuit 20 preferably includes an indoor heat exchanger bypass path 26 for allowing the heating medium to bypass the indoor heat exchanger 25 . When the air conditioning in the machine room 8 is not performed, the temperature control system 1 can supply the heating medium bypassing the indoor heat exchanger 25 through the indoor heat exchanger bypass path 26 to the battery device 6 .

[0033] 〔Structure of control device〕 like Figure 2 As shown in (a), the control device 5 corresponds to a computer including a memory 501, a calculation unit 502, a storage unit 503, and an input / output unit 504. The "computer" also includes a programmable logic controller (PLC: programmable logic controller). The control device 5 operates according to a computer program read from the storage unit 503 and executed.

[0034] In each operation mode in which the compressor 11 is operated, the control device 5 performs drive control of the compressor 11 and can increase or decrease the cooling capacity or the heating capacity by increasing or decreasing the circulation flow rate of the refrigerant.

[0035] like Figure 2As shown in (b), the control device 5 includes, as processing modules of a computer program, a mode switching unit 51, a defrosting necessity determining unit 52, a parking place information processing unit 53, a history information processing unit 54, a pump speed setting unit 55, and a defrosting end processing unit 56. The control device 5 preferably includes at least one arbitrarily selected from the processing modules 52 to 56 in addition to the mode switching unit 51. The control device 5 is preferably connected to a main control system of a vehicle equipped with the temperature control system 1, such as an ECU (Electronic Control Unit), so as to be capable of data transmission and reception.

[0036] When the switching information A regarding the running or stopped state of the vehicle satisfies a predetermined switching condition B, the mode switching unit 51 switches the operation mode from the heat pump mode HP or the heater mode HT to the heat storage utilizing defrosting mode HS. Here, the switching information A and the switching condition B may be, for example, one or more of the following combinations A1, B1, etc. The switching condition B may be stored in the storage unit 503 .

[0037] Switching information A1: Wind speed vw of the outside air passing through the wind path of the outdoor heat exchanger 23 Conversion condition B1: wind speed vw is lower than the specified wind speed vw0 The wind speed vw is related to the vehicle's running speed and the flow rate of the air supplied by the outdoor blower 23A. The wind speed vw can be derived by, for example, obtaining data related to the wind speed vw from the vehicle's main control system and calculating by the calculation unit 502. Alternatively, the wind speed vw can be obtained using a wind speed sensor disposed in the wind path. The wind speed vw0 as the switching condition B1 can be set to, for example, the wind speed when the vehicle is traveling slowly or at a speed equivalent to traveling slowly due to road congestion.

[0038] Switching information A2: vehicle speed vr Conversion condition B2: Driving speed vr is lower than the specified wind speed vr0 The running speed vr can be acquired from, for example, the main control system of the vehicle. The running speed vr can be set to, for example, a running speed during slow movement (a speed at which the vehicle can stop immediately) or a running speed equivalent to slow movement.

[0039] Switching information A3: Status of the power supply of the vehicle's main control system sp Switching condition B3: As the power state sp selects main power off Here, the power state sp corresponds to power on, power off, etc. caused by the operation of the so-called ignition device. If the main power is off as the power state sp when the vehicle stops running, the operation of the compressor 11 stops. However, even if the main power is off, the external power replaces the main power during the process of charging the battery device 6 by the external power during parking, so the compressor 11 can be operated. The state of the power supply sp can be obtained from the main control system of the vehicle.

[0040] The defrosting necessity determination unit 52 determines whether to remove (defrost) the frost attached to the outdoor heat exchanger 23. As the frost on the outdoor heat exchanger 23 progresses, the air passage of the outdoor heat exchanger 23 through which the outside air passes becomes narrower. If the air passage is blocked by a certain amount or more due to the frost, the flow rate of the outside air is reduced, and the efficiency of the heat exchange is greatly reduced. Whether defrosting is required can be determined, for example, by applying a threshold value to the degree of frost calculated based on the pressure of the refrigerant in the evaporator 14 (low pressure pL) and the outside air temperature T. The low pressure pL is detected by the pressure sensor 64, and the outside air temperature T is detected by the outside air temperature sensor 61. The temperature TC of the refrigerant sucked into the compressor 11 and the outside air temperature T may be used instead of the low pressure pL and the outside air temperature T. The temperature TC of the refrigerant sucked into the compressor 11 is detected by the temperature sensor 63.

[0041] The parking place information processing unit 53 can register one or more registered places Dr as parking place information Ds related to the current position of the vehicle when stopped, and can determine whether the parking place information Ds matches the registered place Dr. The parking place information processing unit 53 can use, for example, GPS (Global Positioning System). The registered place Dr corresponds to, for example, a parking lot at home or work. The registered place Dr may be stored in the storage unit 503 .

[0042] The history information processing unit 54 stores the transition of the operation mode of the temperature control system 1 in the storage unit 503 etc. after the vehicle main control system is powered on. The history information processing unit 54 can acquire the history information Dh of the transition from the heat pump mode HP to the heater mode HT.

[0043] The pump rotation speed setting unit 55 provides an appropriate standard rotation speed N to each of the first pump 21 and the second pump 22 according to the operation mode. The standard rotation speed N is determined for each operation mode as follows, for example: The second rotation speed N2 is greater than the first rotation speed N1. Cooling mode: 1st speed N1 Heat pump mode HP: 1st speed N1 Heater mode HT: 2nd speed N2 Heat storage defrosting mode HS: 2nd speed N2

[0044] In the heat storage utilizing defrosting mode HS, the defrost termination processing unit 56 stops the circulation of the heating medium if the termination information a regarding whether or not defrosting of the outdoor heat exchanger 23 is possible satisfies a predetermined termination condition b. The end information a and the end condition b may be, for example, one or more of the following combinations a1, b1, etc. The end condition b may be stored in the storage unit 503 .

[0045] End information a1: Temperature of the heating medium TM End condition b1: The temperature TM of the heating medium is lower than the specified temperature T0 The temperature TM of the heating medium can be acquired, for example, by a temperature sensor 62 that detects the temperature of the heating medium near the outlet of the heating medium of the evaporator 14. The predetermined temperature T0 is, for example, 0°C.

[0046] End information a2: time t from the start time of the heat storage utilization defrosting mode HS End condition b2: Time t exceeds the specified time t0 The time t can be acquired by a timer (not shown) or the like.

[0047] Furthermore, it is preferable that the defrost end processing unit 56 increases the rotation speed of the outdoor fan 23A when the circulation of the heating medium is stopped in the heat storage utilizing defrost mode HS.

[0048] [Explanation of operation mode] Next, the function of each operation mode of the temperature control system 1 and the function of switching the operation modes will be described.

[0049] Heat pump mode HP( Figure 1 ): In the heat pump mode HP, heat is extracted from the outside air as a heat source to a heating medium having a temperature higher than that of the outside air and is transported to the machine room 8 , thereby heating the inside of the machine room 8 . In the heat pump mode HP, a first circuit C1 is formed in which the heating medium circulates through the evaporator 14 and the outdoor heat exchanger 23 by the first pump 21, and a second circuit C2 is formed in which the heating medium circulates through the condenser 12 and the second indoor heat exchanger 25-2 by the second pump 22.

[0050] exist Figure 1 In the figure, the flow of the relatively low temperature heat medium flowing out of the evaporator 14 is indicated by a solid line, and the flow of the relatively high temperature heat medium flowing out of the condenser 12 is indicated by a dashed line. The path where neither the low temperature heat medium nor the high temperature heat medium is pressure-fed (unused path) is indicated by a dotted line. The meaning of the dotted line is the same as in other figures.

[0051] The heat medium that transfers heat to the refrigerant through the evaporator 14 absorbs heat from the outside air through the outdoor heat exchanger 23 and returns to the evaporator 14 through the first switching valve 31. The battery device 6 can be cooled by supplying the heat medium to the first heat exchange path 414 through the first switching valve 31 and the first battery switching valve 34 as needed. On the other hand, the heating medium that has absorbed heat from the refrigerant in the condenser 12 passes through the second indoor heat exchanger 25 - 2 to heat the interior of the machine room 8 , and then returns to the condenser 12 via the first switching valve 31 .

[0052] The heat pump mode HP utilizes the outside air as a part of the heat source, thereby ensuring the heating capacity while suppressing the increase in the power of the compressor 11, the pumps 21, 22, and the like.

[0053] Heater mode HT( Figure 3 ): The heater mode HT is suitable for heating operation when the outside air temperature is much lower than the freezing point (for example, the outside air temperature is -20° C. or lower). The heater mode HT is operated using the compressor 11 as a heat source.

[0054] When heating operation is selected through the operation of the occupant or through the temperature control system 1, the control device 5 can, for example, apply a threshold value to the outside air temperature detected by the outside air temperature sensor 61, and can select the above-mentioned heat pump mode HP when the outside air temperature is high, and select the heater mode HT when the outside air temperature is low.

[0055] In the heater mode HT, a single continuous first continuous flow path CC1 is formed. At this time, the heat medium circulates in the condenser 12, the indoor heat exchanger 25, the evaporator 14, and the outdoor heat exchanger bypass path 24 in sequence through the first pump 21 and the second pump 22. Regarding the flow of the heat medium, the evaporator 14 and the condenser 12 are arranged in series. As needed, the heat medium is supplied to the second heat exchange path 415 through the first switching valve 31 and the second battery switching valve 35, so that the battery device 6 can be cooled.

[0056] In the heater mode HT, one of the first pump 21 and the second pump 22 can be stopped, but in the present embodiment, both the first pump 21 and the second pump 22 are operated. This is also the same in the heat storage utilizing defrosting mode HS.

[0057] exist Figure 3In the figure, a relatively low temperature heat medium is indicated by a solid line, and a relatively high temperature heat medium is indicated by a dashed line. However, unlike the case where the first circuit C1 and the second circuit C2 are formed, the flow of the heat medium from the evaporator 14 to the condenser 12 is indicated by a solid line, and the flow of the heat medium from the condenser 12 to the evaporator 14 is indicated by a dashed line. This means that if the heat medium flows into the evaporator 14, the temperature of the heat medium decreases due to heat dissipation to the refrigerant, and if the heat medium flows into the condenser 12, the temperature of the heat medium increases due to heat absorption from the refrigerant.

[0058] If the heat medium flowing out of the condenser 12 passes through the second indoor heat exchanger 25-2 to heat the machine room 8, it flows into the evaporator 14 and at least the evaporator 14 in the evaporator bypass path 14A through the first switching valve 31. The heat medium, which has dissipated heat to the refrigerant through the evaporator 14, flows into the outdoor heat exchanger bypass path 24 through the second switching valve 32, and then flows into the condenser 12 and at least the condenser 12 in the condenser bypass path 12A, thereby absorbing heat from the refrigerant.

[0059] The heater mode HT allows the heat medium to bypass the outdoor heat exchanger 23 through the outdoor heat exchanger bypass path 24, thereby avoiding heat dissipation from the heat medium to the outside air, and at the same time, the heat medium transmits heat corresponding to the power of the compressor 11 to the machine room 8. According to the first continuous flow path CC1, the low pressure of the refrigerant circuit 10 is increased by the heat medium passing through the condenser 12 and the second indoor heat exchanger 25-2 dissipating heat to the refrigerant through the evaporator 14. In this way, the density of the refrigerant sucked into the compressor 11 increases, and the circulation amount of the refrigerant increases, so that the heating capacity can be ensured even if the outside air temperature is very low.

[0060] Heat storage defrosting mode HS ( Figure 4 ): The heat storage utilizing defrosting mode HS utilizes the heat stored in the heating medium for defrosting the outdoor heat exchanger 23 by performing the heat pump mode HP or the heater mode HT. In the heat storage defrosting mode HS, a single continuous second continuous flow path CC2 is formed. At this time, the heat medium circulates in the condenser 12, the indoor heat exchanger 25, the evaporator 14 and at least one of the evaporator bypass path 14A and the outdoor heat exchanger 23 in sequence through the first pump 21 and the second pump 22. Regarding the flow of the heat medium, the evaporator 14 and the condenser 12 are arranged in series.

[0061] In the heat storage utilizing defrosting mode HS, in order to prevent heat dissipation from the heating medium to the refrigerant and maintain the heat storage amount of the heating medium, it is preferred that the heating medium bypass the evaporator 14 through the evaporator bypass path 14A.

[0062] exist Figure 4In the figure, a relatively low temperature heat medium is indicated by a solid line, and a relatively high temperature heat medium is indicated by a dashed line. However, the flow of the heat medium flowing out of the condenser 12 and flowing through the evaporator bypass path 14A to the outdoor heat exchanger 23 is indicated by a dashed line, and the flow of the heat medium flowing out of the outdoor heat exchanger 23 to the condenser 12 is indicated by a solid line.

[0063] Figure 4 The example shown shows that the power state sp becomes the state where the main power is off and the compressor 11 is stopped by operating the power operation unit when the vehicle stops running. At this time, the refrigerant circuit 10 is not operating and is therefore indicated by a dotted line. When the vehicle is running and the temperature control system 1 is operating, the compressor 11 is typically operating.

[0064] Even if the main power supply of the main control system of the vehicle is turned off, the pumps 21 and 22 are operated by the subsidiary power supply. exist Figure 4 In the example shown, the outdoor fan 23A and the indoor fan 25A are operated, but the present invention is not limited to this, and one or both of the outdoor fan 23A and the indoor fan 25A may be stopped.

[0065] Switching from heat pump mode HP to heat storage defrosting mode HS: When the outside air temperature is below freezing and the heat pump mode HP is operated, frost forms on the outdoor heat exchanger 23. To prevent a reduction in heating capacity due to the progress of frost formation, the outdoor heat exchanger 23 can be defrosted using a high temperature heating medium in the second circuit C2 in the heat pump mode HP. However, even if the high temperature heat medium is supplied to the outdoor heat exchanger 23 while the vehicle is traveling at a normal speed, the outside air and the high temperature heat medium exchange heat, and the heat energy of the high temperature heat medium is hardly used to melt the frost attached to the outdoor heat exchanger 23 .

[0066] Therefore, during operation in the heat pump mode HP, as described above, when the switching information A regarding the vehicle's running or stopped state meets the switching condition B, the mode switching unit 51 switches the operation mode from the heat pump mode HP to the heat storage defrosting mode HS. For example, the wind speed vw of the outside air passing through the wind path of the outdoor heat exchanger 23 is lower than the predetermined wind speed vw0 (switching information A1 and switching condition B1). If the vehicle travels at a reduced speed and frosting of the outdoor heat exchanger 23 progresses, the wind speed vw decreases.

[0067] Switching from the heat pump mode HP to the heat storage utilizing defrosting mode HS may be performed in the following cases. When the vehicle's running speed vr is lower than a predetermined running speed r0 (switching information A2 and switching condition B2). The case where the main power supply is off is selected as the power supply state sp of the main control system of the vehicle (switching information A3 and switching condition B3). In this case, if the battery device 6 is not connected to the external power supply for charging, the compressor 11 is stopped.

[0068] In any of the three switching modes, when the vehicle's running speed is sufficiently low or the vehicle is stopped, the operation mode is switched from the heat pump mode HP to the heat storage defrosting mode HS. Therefore, while suppressing the influence of the vehicle's running on the defrosting efficiency, the heat stored in the heating element before the mode switching is supplied to the outdoor heat exchanger 23, thereby efficiently removing frost from the outdoor heat exchanger 23.

[0069] Furthermore, according to the heat storage utilizing defrosting mode HS, the compressor 11 can be operated as a heat source while supplying the heating medium to the outdoor heat exchanger 23, thereby ensuring the required heating capacity. Heating of the machine room 8 is not necessarily required when the vehicle is parked, but when the battery device 6 is connected to an external power source, the compressor 11 can be operated to heat the machine room 8. When heating is not performed, it is preferred to stop the indoor blower 25A to maintain the heat storage amount of the heating medium.

[0070] The second circuit C2 in the heat pump mode HP includes a pipe from the outdoor side to the indoor heat exchanger 25, and therefore has a longer path length than the first circuit C1. Therefore, the second circuit C2 holds more heating medium than the first circuit C1. The temperature of the heating medium in the second circuit C2 is sufficiently higher than the temperature of the heating medium in the first circuit C1 which is equal to the temperature of the outside air.

[0071] In order to utilize the high-temperature heat medium of the second circuit C2 for defrosting the outdoor heat exchanger 23 without waste, the defrost termination processing unit 56 preferably operates the pumps 21 and 22 for a predetermined time t0 calculated from the volume of the second circuit C2 and the discharge flow rates of the pumps 21 and 22 according to the termination information a2 and the termination condition b2 after the operation mode is switched from the heat pump mode HP to the heat storage utilizing defrost mode HS. That is, if the time t from the start time of the heat storage utilizing defrost mode HS exceeds the predetermined time t0, the defrost termination processing unit 56 stops the circulation of the heat medium. The defrost end processing unit 56 preferably increases the rotation speed of the outdoor fan 23A as the circulation of the heating medium stops. This blows away water attached to the outdoor heat exchanger 23 due to melting of frost, thereby preventing the outdoor heat exchanger 23 from frost forming again.

[0072] As described above, if the time for operating the pumps 21 and 22 in the heat storage defrost mode HS is limited to a certain time, the circulation of the heat medium is terminated at the moment when the high-temperature heat medium of a specified capacity that stores heat flows through the outdoor heat exchanger 23 in the heat pump mode HP, thereby preventing the outdoor heat exchanger 23 from being recooled due to the low-temperature heat medium flowing through the outdoor heat exchanger 23. At the same time, the speed N of the pumps 21 and 22 can be increased to the second speed N2 relative to the first speed N1 in the heat pump mode HP by the pump speed setting unit 55. As a result, the amount of heat transferred from the pumps 21 and 22 to the heat medium increases as a power loss of the pumps 21 and 22, so that the temperature of the heat medium supplied to the outdoor heat exchanger 23 can be maintained high.

[0073] Before the operation mode is switched to the heat storage utilizing defrost mode HS by the mode switching unit 51, it may be determined by the defrost necessity determining unit 52 whether the outdoor heat exchanger 23 is required to be defrosted. In this case, if the result of the determination of whether defrosting is required is "necessary" and the switching information A (A1, etc.) meets the switching condition B (B1, etc.), the mode switching unit 51 implements the heat storage utilizing defrost mode HS.

[0074] Switching from heater mode HT to heat storage defrost mode HS: The mode switching unit 51 switches from the heater mode HT to the heat storage utilizing defrosting mode HS when the switching information A ( A1 etc.) satisfies the switching condition B ( B1 etc.) during the operation in the heater mode HT. The heater mode HT is different from the heat pump mode HP in that the heat medium is detoured from the outdoor heat exchanger 23 through the outdoor heat exchanger bypass path 24, so that frost does not form on the outdoor heat exchanger 23. Therefore, when the history information processing unit 54 obtains the switching information Dh of switching from the heat pump mode HP to the heater mode HT due to low outdoor air temperature, and when the switching information A meets the switching condition B, the mode switching unit 51 can implement the heat storage utilization defrosting mode HS. Alternatively, when the result of the determination of whether defrosting is necessary or not determined by the defrosting necessity determination unit 52 is "necessary" and the switching information A meets the switching condition B, the heat storage utilizing defrosting mode HS may be implemented.

[0075] The switching information A and the switching condition B can be considered in the same way as in the heat pump mode HP, so the description is omitted. By switching the information A and the switching condition B, the frost on the outdoor heat exchanger 23 can be efficiently removed by supplying the heat stored in the heating element before the mode switching to the outdoor heat exchanger 23 while suppressing the influence of the vehicle running on the defrosting efficiency. Furthermore, according to the heat storage utilizing defrosting mode HS, except when the compressor 11 is stopped, the required heating capacity can be ensured while supplying the heating medium to the outdoor heat exchanger 23 and operating the compressor 11 as a heat source.

[0076] In the heater mode HT, the average temperature of the heating medium flowing in the first continuous flow path CC1 without heat exchange with the outside air is higher than the average temperature of the heating medium flowing in the first circuit C1 and the heating medium flowing in the second circuit C2 in the heat pump mode HP. Even if the temperature of the heating medium flowing in the high temperature range (dotted line) of the heater mode HT is equal to the temperature of the heating medium flowing in the first circuit C1 of the heat pump mode HP, the temperature of the heating medium flowing in the low temperature range (solid line) of the heater mode HT is sufficiently higher than the temperature of the heating medium flowing in the second circuit C2 of the heat pump mode HP (for example, -5°C).

[0077] After the operation mode is switched from the heater mode HT to the heat storage defrosting mode HS, the outdoor heat exchanger 23 is defrosted by the heat medium circulating in the second continuous flow path CC2. In the operation in the heat storage defrosting mode HS, the speed N of the pumps 21 and 22 can be increased to a second speed N2 greater than the first speed N1 in the heat pump mode HP by the pump speed setting unit 55. As a result, the amount of heat transferred from the pumps 21 and 22 to the heat medium increases as the power loss of the pumps 21 and 22, so that the temperature of the heat medium supplied to the outdoor heat exchanger 23 can be maintained high.

[0078] If, from the start time of the heat storage defrost mode HS, the temperature TM of the heat medium meets the condition of being lower than the specified temperature T0 (for example, 0°C) according to the end information a1 and the end condition b1, the defrost end processing unit 56 stops the defrost, so the operation of the pumps 21 and 22 can be stopped to stop the circulation of the heat medium. The defrost end processing unit 56 preferably increases the rotation speed of the outdoor air blower 23A as the circulation of the heating medium stops. This causes water adhering to the outdoor heat exchanger 23 to be blown off from the outdoor heat exchanger 23, thereby preventing re-frosting.

[0079] The following description can be applied to both the case of switching from the heat pump mode HP to the heat storage utilizing defrost mode HS and the case of switching from the heater mode HT to the heat storage utilizing defrost mode HS. The heat storage utilizing defrosting mode HS is preferably implemented immediately after the vehicle stops when the vehicle is expected to stop for a long time.

[0080] "Assuming that the parking time is long", the parking place information processing unit 53 can determine whether the parking place information Ds related to the current position of the vehicle matches the registered place Dr. The registered place Dr is pre-registered by the user, for example, a place where the vehicle is parked for a long time, such as a home. If the parking place information processing unit 53 determines that the parking place information Ds matches the registered place Dr, the mode switching unit 51 can quickly start the heat storage defrosting mode HS after determining whether defrosting is required, etc. as needed. According to this control, when the parking place information Ds does not match the registered place Dr, even if the switching information A matches the switching condition B, the heat storage utilizing defrost mode HS is not implemented, so it is possible to avoid switching from the heat pump mode HP or the heater mode HT to the heat storage utilizing defrost mode HS during a short parking time. If this control is not performed and the heat storage utilizing defrost mode HS is switched once, the temperature of the heat medium will decrease, so it will take some time to increase the temperature of the heat medium and return to the stable state of the heat pump mode HP or the heater mode HT.

[0081] The user can register a defrost execution time period Dt instead of or together with the registered location Dr. The defrost execution time period Dt is, for example, a time period at night. When the vehicle is stopped during the defrost execution time period Dt, defrosting based on the heat stored in the heat medium can be automatically performed immediately after the vehicle is stopped by the heat storage utilizing defrost mode HS. Furthermore, the control device 5 is not necessarily based on the registration of the registration location Dr or the defrost execution time period Dt, and can implement the heat storage defrost mode HS based on the vehicle use history data related to the vehicle position and time. That is, the control device 5 can automatically implement the heat storage defrost mode HS when it is estimated from the vehicle use history data that the parking time at the current parking location is long.

[0082] [Modifications] like Figure 5 As shown, in the heat storage utilization defrost mode HS, the heating medium may also flow into the evaporator 14. In this case, assuming that the switch from the heat pump mode HP to the heat storage utilization defrost mode HS is made, the temperature of the heating medium flowing out of the evaporator 14 is lower than that in the heat storage utilization defrost mode HS ( Figure 4 ) is the temperature of the heating medium flowing out of the evaporator 14. If defrosting is performed using the heat of the heating medium, the temperature of the heating medium (indicated by a thick solid line) flowing out of the outdoor heat exchanger 23 is also lower than that of the above-mentioned embodiment. Therefore, the above-mentioned embodiment in which the heating medium is bypassed from the condenser 12 through the evaporator bypass path 14A is advantageous in terms of defrosting efficiency. On the other hand, if the evaporator temperature exceeds 0° C. when switching from the heater mode HT to the heat storage utilizing defrosting mode HS, the heat storage utilizing defrosting mode HS ( Figure 4 ) When the temperature of the heating medium after running for a certain period of time is reduced, the heating medium can be flowed into the evaporator 14. Thereby, the temperature of the heating medium can be increased, so that defrosting can be continued.

[0083] In addition to the above, the structures listed in the above embodiments may be selected or replaced, or may be appropriately changed to other structures.

[0084] [Note] [1] A temperature control system for a vehicle, comprising: The refrigerant circuit 10 includes a compressor 11, a high-pressure side heat exchanger 12, a pressure reducing unit 13, and a low-pressure side heat exchanger 14, and is configured so that the refrigerant can circulate according to a refrigeration cycle; and The heating medium circuit (20) is configured to circulate a heating medium for exchanging heat with the refrigerant. The heat carrier circuit 20 has: The high-pressure side heat exchanger 12 enables the refrigerant to exchange heat with the heat carrier; The low-pressure side heat exchanger 14 enables the refrigerant to exchange heat with the heat carrier; A low-pressure side bypass path 14A allows the heat medium to bypass the low-pressure side heat exchanger 14; The first pump 21 and the second pump 22 are configured to be able to pressure-transport the heat medium; The outdoor heat exchanger 23 allows the external air to exchange heat with the heat carrier; An outdoor heat exchanger bypass path 24 allows the heat medium to bypass the outdoor heat exchanger 23; and The temperature control device 6, 25-2 is heated or cooled by the heat carrier, or is used to heat or cool the temperature control object, The temperature control system has as an operating mode: Heat pump mode HP, forming a first circuit C1 in which the heat medium circulates through the low-pressure side heat exchanger 14 and the outdoor heat exchanger 23 via the first pump 21, and a second circuit C2 in which the heat medium circulates through the high-pressure side heat exchanger 12 and the temperature control devices 6, 25-2 via the second pump 22; The compressor heat source mode HT forms a first continuous flow path CC1 in which the heat medium circulates through the high-pressure side heat exchanger 12, the temperature control device 6, 25-2, the low-pressure side heat exchanger 14 and the outdoor heat exchanger bypass path 24 through at least one of the first pump 21 and the second pump 22; The heat storage utilizing defrost mode HS forms a second continuous flow path CC2 in which the heat medium circulates through at least one of the first pump 21 and the second pump 22 in the high-pressure side heat exchanger 12, the temperature control device 6, 25-2, the low-pressure side heat exchanger 14 and at least one of the low-pressure side bypass path 14A, and the outdoor heat exchanger 23; and A control device 5 is provided, and the control device 5 is configured so that if switching information related to the driving or driving stop state of the vehicle equipped with the temperature control system meets the prescribed switching conditions, the operation mode is switched from the heat pump mode HP or the compressor heat source mode HT to the heat storage defrosting mode HS.

[0085] [2] The vehicle temperature control system according to [1], wherein: In the heat storage utilizing defrosting mode HS, the heat stored in the heat medium is utilized for defrosting the outdoor heat exchanger 23 before switching to the heat storage utilizing defrosting mode HS.

[0086] [3] The vehicle temperature control system according to [1] or [2], wherein: The switching information is equivalent to the wind speed of the air passing through the outdoor heat exchanger 23. The switching condition corresponds to the wind speed being lower than a predetermined wind speed.

[0087] [4] The vehicle temperature control system according to [1] or [2], wherein: The switching information corresponds to the driving speed of the vehicle. The switching condition corresponds to the traveling speed being lower than a predetermined traveling speed.

[0088] [5] The vehicle temperature control system according to [1] or [2], wherein: The switching information corresponds to the state of the power supply of the vehicle, The switching condition corresponds to selecting main power off as the state of the power supply.

[0089] [6] A vehicle temperature control system according to any one of [1] to [5], wherein: The control device 5 is configured as follows: If the parking place information related to the current position of the vehicle when parked matches a predetermined registered place and the state of the power source matches the switching condition, the heat storage utilizing defrost mode HS is implemented.

[0090] [7] The vehicle temperature control system according to [1], wherein: The control device 5 is configured as follows: If there is historical information of shifting from the heat pump mode HP to the compressor heat source mode HT after the power of the vehicle is turned on, and the switching information satisfies the switching condition, the heat storage utilizing defrosting mode HS is implemented.

[0091] [8] A vehicle temperature control system according to any one of [1] to [7], wherein: The control device 5 is configured as follows: If the result of determining whether the outdoor heat exchanger 23 is required to be defrosted is that it is necessary, and the switching information satisfies the switching condition, the heat storage utilizing defrosting mode HS is implemented.

[0092] [9] A vehicle temperature control system according to any one of [1] to [8], wherein: The control device 5 is configured as follows: In the heat storage utilizing defrosting mode HS, a second rotation speed higher than the first rotation speed set in the heat pump mode HP is given to at least one of the first pump 21 and the second pump 22 .

[0093]

[10] A vehicle temperature control system according to any one of [1] to [9], wherein: In the heat storage defrosting mode HS, The heat medium circulates in the second continuous flow path CC2 in the order of the low-pressure side heat exchanger 14, the outdoor heat exchanger 23, the high-pressure side heat exchanger 12, and the temperature control device 25-2.

[0094]

[11] A vehicle temperature control system according to any one of [1] to

[10] , wherein: The control device 5 is configured to stop the circulation of the heating medium when the termination information regarding whether or not the outdoor heat exchanger 23 can be defrosted satisfies a predetermined termination condition in the heat storage utilizing defrosting mode HS.

[0095]

[12] The vehicle temperature control system according to

[11] , wherein: The end information corresponds to the temperature of the heat medium. The end condition corresponds to the temperature of the heating medium being lower than a predetermined temperature.

[0096]

[13] The termination condition according to

[11] is equivalent to the time exceeding a prescribed time, wherein: The end information corresponds to the time from the start time of the heat storage utilizing defrosting mode HS. The termination condition corresponds to the time period exceeding a predetermined time period.

[0097]

[14] The vehicle temperature control system according to

[11] , wherein: The control device 5 is configured to increase the rotation speed of the outdoor air blower that blows air to the outdoor heat exchanger 23 when the circulation of the heating medium is stopped in the heat storage utilizing defrost mode HS.

[0098]

[15] A temperature control method for a vehicle, which is a temperature control method using a temperature control system for a vehicle, wherein: The temperature control system has: The refrigerant circuit 10 includes a compressor 11, a high-pressure side heat exchanger 12, a pressure reducing unit 13, and a low-pressure side heat exchanger 14, and is configured so that the refrigerant can circulate according to a refrigeration cycle; and The heating medium circuit (20) is configured to circulate a heating medium for exchanging heat with the refrigerant. The heat carrier circuit 20 has: The high-pressure side heat exchanger 12 enables the refrigerant to exchange heat with the heat carrier; The low-pressure side heat exchanger 14 enables the refrigerant to exchange heat with the heat carrier; A low-pressure side bypass path 14A allows the heat medium to bypass the low-pressure side heat exchanger 14; The first pump 21 and the second pump 22 are configured to be able to pressure-transport the heat medium; The outdoor heat exchanger 23 allows the external air to exchange heat with the heat carrier; An outdoor heat exchanger bypass path 24 allows the heat medium to bypass the outdoor heat exchanger 23; and The temperature control device 6, 25-2 is heated or cooled by the heat carrier, or is used to heat or cool the temperature control object, The temperature control system has as an operating mode: Heat pump mode HP, forming a first circuit C1 in which the heat medium circulates through the low-pressure side heat exchanger 14 and the outdoor heat exchanger 23 via the first pump 21, and a second circuit C2 in which the heat medium circulates through the high-pressure side heat exchanger 12 and the temperature control devices 6, 25-2 via the second pump 22; The compressor heat source mode HT forms a first continuous flow path CC1 in which the heat medium circulates through the high-pressure side heat exchanger 12, the temperature control device 6, 25-2, the low-pressure side heat exchanger 14 and the outdoor heat exchanger bypass path 24 through at least one of the first pump 21 and the second pump 22; The heat storage utilizing defrost mode HS forms a second continuous flow path CC2 in which the heat medium circulates through at least one of the first pump 21 and the second pump 22 in the high-pressure side heat exchanger 12, the temperature control device 6, 25-2, the low-pressure side heat exchanger 14 and at least one of the low-pressure side bypass path 14A, and the outdoor heat exchanger 23. In the temperature control method, If the switching information related to the driving or stopping state of the vehicle equipped with the temperature control system meets the prescribed switching condition, the operation mode is switched from the heat pump mode HP or the compressor heat source mode HT to the heat storage defrosting mode HS, thereby, Before switching to the heat storage utilizing defrosting mode, the heat stored in the heating medium is utilized for defrosting the outdoor heat exchanger. Explanation of symbols

[0099] 1- Temperature control system (temperature control system for vehicle), 5- Control device, 6- Battery device (temperature control device), 8- Machine room, 10- Refrigerant circuit, 11- Compressor, 12- Condenser (High-pressure side heat exchanger), 12A- Condenser bypass path, 12V- Condenser flow control valve, 13- Expansion valve (pressure reducing part), 14- Evaporator (Low-pressure side heat exchanger), 14A- Evaporator bypass path (Low-pressure side bypass path), 14V- Evaporator flow control valve, 20- Heat medium circuit, 21- 1st pump, 22- 2nd pump, 23- Outdoor heat exchanger, 23A- Outdoor fan, 24- Outdoor heat exchanger bypass path, 25-1- 1st indoor heat exchanger, 25-2- 2nd indoor heat exchanger (temperature control device), 25A- Indoor fan, 26- Indoor heat exchanger bypass path, 31- 1st switching valve, 32- the second switching valve, 33- the third switching valve, 34- the switching valve for the first battery, 35- the switching valve for the second battery, 51- the mode switching unit, 52- the defrosting necessity determination unit, 53- the parking place information processing unit, 54- the history information processing unit, 55- the pump speed setting unit, 56- the defrosting end processing unit, 61- the outside air temperature sensor, 62, 63- the temperature sensor, 64- the pressure sensor, 414- the first heat exchange path, 415- the second heat exchange path, 501- the memory, 502- the calculation unit, 503- the storage unit, 504- the input / output unit, C1- the first circuit, C2- the second circuit, CC1- the first continuous flow path, CC2- the second continuous flow path, HP- the heat pump mode, HS- the heat storage utilization defrosting mode, HT- the heater mode (the compressor heat source mode), U- the HVAC unit.

Claims

1. A temperature control system for a vehicle, comprising: A refrigerant circuit includes a compressor, a high-pressure side heat exchanger, a pressure reducing unit, and a low-pressure side heat exchanger, and is configured so that the refrigerant can circulate according to a refrigeration cycle; and The heat medium circuit is configured to circulate a heat medium for exchanging heat with the refrigerant. The heat carrier circuit The high-pressure side heat exchanger enables the refrigerant to exchange heat with the heat carrier; The low-pressure side heat exchanger enables the refrigerant to exchange heat with the heat carrier; A low-pressure side bypass path allows the heat carrier to bypass the low-pressure side heat exchanger; The first pump and the second pump are configured to pressure-transport the heat medium; An outdoor heat exchanger is used to exchange heat between the external air and the heat carrier; an outdoor heat exchanger bypass path, allowing the heat medium to bypass the outdoor heat exchanger; and A temperature control device, which is heated or cooled by the heat carrier, or is used to heat or cool a temperature control object, The temperature control system has as an operating mode: Heat pump mode, forming a first circuit in which the heat medium circulates through the low-pressure side heat exchanger and the outdoor heat exchanger through the first pump, and a second circuit in which the heat medium circulates through the high-pressure side heat exchanger and the temperature control device through the second pump; A compressor heat source mode forms a first continuous flow path in which the heat medium circulates through at least one of the first pump and the second pump in the high-pressure side heat exchanger, the temperature control device, the low-pressure side heat exchanger, and the outdoor heat exchanger bypass path; The heat storage utilizes the defrosting mode to form a second continuous flow path in which the heat medium circulates through at least one of the first pump and the second pump in the high-pressure side heat exchanger, the temperature control device, the low-pressure side heat exchanger and at least one of the low-pressure side bypass path, and the outdoor heat exchanger; and A control device is provided, wherein if switching information related to the driving or driving stop state of the vehicle equipped with the temperature control system meets a prescribed switching condition, the operation mode is switched from the heat pump mode or the compressor heat source mode to the heat storage utilization defrosting mode.

2. The vehicle temperature control system according to claim 1, wherein: In the heat storage utilizing defrosting mode, the heat stored in the heat medium is utilized for defrosting the outdoor heat exchanger before switching to the heat storage utilizing defrosting mode.

3. The vehicle temperature control system according to claim 1, wherein: The switching information corresponds to the wind speed of the air passing through the outdoor heat exchanger. The switching condition corresponds to the wind speed being lower than a predetermined wind speed.

4. The vehicle temperature control system according to claim 1, wherein: The switching information corresponds to the driving speed of the vehicle. The switching condition corresponds to the traveling speed being lower than a predetermined traveling speed.

5. The vehicle temperature control system according to claim 1, wherein: The switching information corresponds to the state of the power supply of the vehicle, The switching condition corresponds to selecting main power off as the state of the power supply.

6. The vehicle temperature control system according to claim 1, wherein: The control device is configured as follows: The heat storage utilizing defrost mode is implemented if parking place information related to the current position of the vehicle when parked matches a predetermined registered place and a state of a power source of the vehicle matches the switching condition.

7. The vehicle temperature control system according to claim 1, wherein: The control device is configured as follows: If there is history information of switching from the heat pump mode to the compressor heat source mode after the power of the vehicle is turned on, and the switching information satisfies the switching condition, the heat storage utilizing defrosting mode is implemented.

8. The vehicle temperature control system according to claim 1, wherein: The control device is configured as follows: If the result of determining whether the outdoor heat exchanger is required to be defrosted is that it is necessary and the switching information satisfies the switching condition, the heat storage utilizing defrosting mode is implemented.

9. The vehicle temperature control system according to claim 1, wherein: The control device is configured as follows: In the heat storage utilizing defrosting mode, a second rotation speed higher than a first rotation speed set in the heat pump mode is applied to at least one of the first pump and the second pump.

10. The vehicle temperature control system according to any one of claims 1 to 9, wherein: In the heat storage defrosting mode, The heat medium circulates in the second continuous flow path in the order of the low-pressure side heat exchanger, the outdoor heat exchanger, the high-pressure side heat exchanger, and the temperature control device.

11. The vehicle temperature control system according to any one of claims 1 to 9, wherein: The control device is configured as follows: In the heat storage utilizing defrosting mode, if the termination information regarding whether or not the outdoor heat exchanger is defrosted satisfies a predetermined termination condition, the circulation of the heating medium is stopped.

12. The vehicle temperature control system according to claim 11, wherein: The end information corresponds to the temperature of the heat medium. The end condition corresponds to the temperature of the heating medium being lower than a predetermined temperature.

13. The vehicle temperature control system according to claim 11, wherein: The end information corresponds to the time from the start time of the heat storage utilizing defrosting mode. The termination condition corresponds to the time period exceeding a predetermined time period.

14. The vehicle temperature control system according to claim 11, wherein: The control device is configured as follows: When the circulation of the heating medium is stopped in the heat storage utilizing defrosting mode, the rotation speed of the outdoor air blower that blows air to the outdoor heat exchanger is increased.

15. A temperature control method for a vehicle, which is a temperature control method using a temperature control system for a vehicle, wherein: The temperature control system has: A refrigerant circuit includes a compressor, a high-pressure side heat exchanger, a pressure reducing unit, and a low-pressure side heat exchanger, and is configured so that the refrigerant can circulate according to a refrigeration cycle; and The heat medium circuit is configured to circulate a heat medium for exchanging heat with the refrigerant. The heat carrier circuit comprises: The high-pressure side heat exchanger enables the refrigerant to exchange heat with the heat carrier; The low-pressure side heat exchanger enables the refrigerant to exchange heat with the heat carrier; A low-pressure side bypass path allows the heat carrier to bypass the low-pressure side heat exchanger; The first pump and the second pump are configured to pressure-transport the heat medium; An outdoor heat exchanger is used to exchange heat between the external air and the heat carrier; an outdoor heat exchanger bypass path, allowing the heat medium to bypass the outdoor heat exchanger; and A temperature control device, which is heated or cooled by the heat carrier, or is used to heat or cool a temperature control object, The temperature control system has as an operating mode: Heat pump mode, forming a first circuit in which the heat medium circulates through the low-pressure side heat exchanger and the outdoor heat exchanger through the first pump, and a second circuit in which the heat medium circulates through the high-pressure side heat exchanger and the temperature control device through the second pump; A compressor heat source mode forms a first continuous flow path in which the heat medium circulates through at least one of the first pump and the second pump in the high-pressure side heat exchanger, the temperature control device, the low-pressure side heat exchanger, and the outdoor heat exchanger bypass path; The heat storage utilizes the defrosting mode to form a second continuous flow path in which the heat medium circulates through at least one of the first pump and the second pump through the high-pressure side heat exchanger, the temperature control device, the low-pressure side heat exchanger and at least one of the low-pressure side bypass path, and the outdoor heat exchanger. In the temperature control method, If the switching information related to the driving or stopping state of the vehicle equipped with the temperature control system meets the prescribed switching condition, the operation mode is switched from the heat pump mode or the compressor heat source mode to the heat storage defrosting mode, thereby, Before switching to the heat storage utilizing defrosting mode, the heat stored in the heating medium is utilized for defrosting the outdoor heat exchanger.

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