Vehicle temperature control system

Abstract

The purpose of the present invention is to improve the vehicle-mounted performance, assemblability, and heating capability of a vehicle temperature control system provided with a heat medium circuit. The vehicle temperature control system includes a refrigerant circuit and a heat medium circuit. The heat medium circuit is provided with: a high-pressure-side heat exchanger; a low-pressure-side heat exchanger; an outdoor heat exchanger; an outdoor heat exchanger bypass path; a temperature control device; and a circuit switching device that includes a plurality of valves and is configured so as to be able to switch the heat medium circuit by switching the flow of the heat medium through the valves. The heat medium circuit is configured so as to be able to set a series circuit including a low-pressure-side heat exchanger and a high-pressure-side heat exchanger arranged in series. The heat medium circuit is provided with a series circuit corresponding to the switching state of each of the plurality of valves.

Description

Technical Field

[0001] The invention relates to a temperature control system installed in a vehicle. 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 thermal management system described in Patent Document 1 includes: a first heating medium circuit, which is provided with an evaporator of a refrigerant circuit and a heating medium external air heat exchanger; and a second heating medium circuit, which is provided with a condenser of a refrigerant circuit and a heater core of a machine room air conditioning unit. The first heating medium circuit and the second heating medium circuit are switched between a non-connected state (non-connected mode) and a connected state (connected mode) assuming a low external air temperature by switching the flow paths of the first switching mechanism and the second switching mechanism.

[0005] In the non-connected mode, the heat pump operates to extract the heat of the outside air to the heat medium of the second heat medium circuit. In the connected mode, the heat medium flowing out of the evaporator does not flow into the heat medium outside air heat exchanger, but merges with the heat medium flowing out of the condenser, so that the heat medium flows into the evaporator and the condenser in parallel. At this time, the first heat medium circuit and the second heat medium circuit are connected via the evaporator and the condenser. Previous technical literature Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6083304 Summary of the invention Technical issues to be solved by the invention

[0007] In order to achieve a multifunctional temperature control system for the thermal management, air conditioning, and passenger comfort of the equipment installed in the vehicle, it is necessary to switch the flow of the heat carrier in a complex manner and set multiple paths. Therefore, the piping structure including multiple flow path switching valves becomes complicated. As a result, the volume becomes larger and the vehicle-mountability becomes worse. In addition, the man-hours for assembling multiple valves, piping, joints, hoses, etc. increase. The first switching mechanism and the second switching mechanism described in Patent Document 1 are each shown as a five-way valve. Since they are composed of a plurality of valves or their internal structures have not been determined, their vehicle-mountability and assemblability are unknown.

[0008] Furthermore, in the connection mode of Patent Document 1, the heat medium flows into the evaporator and the condenser in parallel, and the heat medium flowing out of the evaporator is mixed with the heat medium flowing out of the condenser, so as to become an intermediate temperature of the temperatures of the respective heat mediums before mixing, and flows into the evaporator and the condenser. Therefore, compared with the non-connection mode, it takes time for the temperature of the heat medium flowing out of the condenser to rise. Moreover, since the flow rate of the heat medium flowing into the evaporator, the condenser and the indoor heat exchanger is reduced, the temperature difference between the refrigerant and the heat medium is small in the evaporator and the condenser. As a result, the effect of raising the low pressure of the refrigeration cycle by the connection mode and the effect of raising the high pressure by reducing the heat medium flow rate of the second heat medium circuit are limited, so there is room for improvement in the heating capacity.

[0009] An object of the present invention is to improve the vehicle-mountability, assembly properties and heating capacity of a vehicle temperature control system having a heating medium circuit. Means for solving technical problems

[0010] The present invention is a temperature control system for a vehicle, which comprises: a refrigerant circuit, including a compressor, a high-pressure side heat exchanger, a pressure reducing unit and a low-pressure side heat exchanger, configured so that the refrigerant can circulate according to a refrigeration cycle; and a heat carrier circuit, configured so that a heat carrier that performs heat exchange with the refrigerant can circulate. The heat carrier circuit includes: a high-pressure side heat exchanger for performing heat exchange between the refrigerant and the heat carrier; a low-pressure side heat exchanger for performing heat exchange between the refrigerant and the heat carrier; an outdoor heat exchanger for performing heat exchange between the outside air and the heat carrier; an outdoor heat exchanger bypass path for allowing the heat carrier to bypass the outdoor heat exchanger; a temperature control device, which is equivalent to a temperature control object heated or cooled by the heat carrier, or is used to heat or cool the temperature control object; and a circuit switching device, which includes a plurality of valves and is configured to switch the heat carrier circuit by switching the flow of the heat carrier through the valves. The heating medium circuit is configured so as to be able to set a series circuit including a low-pressure side heat exchanger and a high-pressure side heat exchanger arranged in series. The heating medium circuit is provided with a series circuit corresponding to the respective switching states of the plurality of valves. Effects of the Invention

[0011] According to the present invention, by providing a circuit switching device configured to switch the heat carrier circuit according to the switching state of the valve, all switching valves on the heat carrier circuit required for realizing various operation modes can be integrated. Therefore, compared with the case where various paths are set by combining various valves distributed on the heat carrier circuit, it is possible to avoid complication of the structure, suppress the volume and ensure vehicle-mountability, and it is possible to omit the labor of assembling joints or hoses, etc. to improve productivity.

[0012] Furthermore, the circuit switching device can set a series circuit in which the low-pressure side heat exchanger and the high-pressure side heat exchanger are arranged in series as a heat medium circuit. According to this series circuit, the heat medium flowing in the high-pressure side heat exchanger is sequentially heated by the refrigerant, so that the temperature of the heat medium can be increased more quickly than when the heat medium flows in parallel into the high-pressure side heat exchanger and the low-pressure side heat exchanger. Furthermore, since the circulation amount of the heat medium in the indoor heat exchanger is large, the heat exchange amount between the heat medium and the air becomes large.

[0013] Furthermore, according to the compressor heat source mode based on the series circuit, the heat medium passing through the high-pressure side heat exchanger and the temperature control device dissipates heat to the refrigerant through the low-pressure side heat exchanger. As a result, compared with the case where heat is absorbed from the outside air to the heat medium, the low pressure of the refrigerant circuit rises, and the density of the refrigerant sucked into the compressor increases, thereby increasing the circulation flow rate of the refrigerant. The increase in the circulation flow rate of the refrigerant increases the heat exchange capacity, thereby improving the heating capacity. Therefore, even when it is difficult to secure a heat source due to low outside air temperature, heating capacity can be secured. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 1 is a circuit diagram showing a vehicle temperature control system according to an embodiment of the present invention. Figure 2 It is an expanded representation Figure 1 An expanded circuit diagram of a plurality of valves included in the circuit switching device shown. Figure 3 (a) means Figure 1 A schematic diagram of the ports of the loop switching device is shown. Figure 3 (b) to (d) are diagrams showing the switching states of the switching valve. Figure 4 Yes means Figure 1 The expanded circuit diagram (No. 1) shows the operating state of the system in the cooling mode. Figure 5 It means Figure 4FIG. 1 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Figure 6 Yes means Figure 1 The expanded circuit diagram (No. 2) shows the operating state of the system in the cooling mode (battery cooling). Figure 7 It means Figure 6 FIG. 2 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Figure 8 Yes means Figure 1 The expanded circuit diagram (No. 3) of the operating state of the system in the first dehumidification and heating mode is shown. Fig. 9 It means Figure 8 FIG. 3 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.10 Yes means Figure 1 4 is an expanded circuit diagram of the operating state of the system in the first dehumidification and heating mode (battery cooling). Fig.11 It means Fig.10 FIG. 4 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.12 Yes means Figure 1 The expanded circuit diagram (No. 5) of the operating state of the system in the second dehumidification and heating mode is shown. Fig.13 It means Fig.12 FIG. 5 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.14 Yes means Figure 1 The expanded circuit diagram (No. 6) of the operating state of the system in the second dehumidification and heating mode (battery cooling) is shown. Fig.15 It means Fig.14 FIG. 6 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.16 Yes means Figure 1 The expanded circuit diagram (No. 7) of the operating state of the system in the second dehumidification and heating mode (battery heating) is shown. Fig.17 It means Fig.16 FIG. 7 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.18 Yes means Figure 1 The expanded circuit diagram (No. 8) of the operating state of the system in the third dehumidification and heating mode is shown. Fig.19 It means Fig.18 FIG. 8 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig. 20 Yes means Figure 1 The expanded circuit diagram (No. 9) of the operating state of the system in the third dehumidification and heating mode (battery cooling) is shown. Fig.21 It means Fig. 20 FIG. 9 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig. 22 Yes means Figure 1 The expanded circuit diagram (No. 10) of the operating state of the system in the third dehumidification and heating mode (battery heating) is shown. Fig.23 It means Fig. 22 FIG. 10 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.24 Yes means Figure 1 The expanded circuit diagram (No. 11) of the operating state of the system in the heat pump mode is shown. Fig.25 It means Fig.24 FIG. 11 shows the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.26 Yes means Figure 1 The expanded circuit diagram (No. 12) of the operating state of the system in the heat pump mode (battery cooling) is shown. Fig. 27 It means Fig.26 FIG. 12 shows the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.28 Yes means Figure 1 The expanded circuit diagram (No. 13) of the operating state of the system in the heat pump mode (battery heating) is shown. Fig.29 It means Fig.28 FIG. 13 shows the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.30 Yes means Figure 1The expanded circuit diagram (No. 14) of the system in the operating state in the startup heat pump mode is shown. Fig.31 It means Fig.30 FIG. 14 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.32 Yes means Figure 1 The expanded circuit diagram (No. 15) of the operating state of the system in the startup heat pump mode (battery heating) is shown. Fig.33 It means Fig.32 FIG. 15 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.34 Yes means Figure 1 An expanded circuit diagram (No. 16) of the operating state of the system in heater mode shown in FIG. Fig.35 It means Fig.34 FIG. 16 shows the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.36 Yes means Figure 1 An expanded circuit diagram (No. 17) of the operating state of the system in heater mode (battery cooling) is shown. Fig.37 It means Fig.36 FIG. 17 shows the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.38 Yes means Figure 1 The system shown is an expanded circuit diagram (No. 18) of the operating state in the heater mode (battery heating). Fig.39 It means Fig.38 FIG. 18 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.40 Yes means Figure 1 The expanded circuit diagram (No. 19) of the operating state of the system in the first startup heater mode is shown. Fig.41 It means Fig.40 FIG. 19 is a diagram showing the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.42 Yes means Figure 1 The expanded circuit diagram (No. 20) of the operating state of the system in the second startup heater mode is shown. Fig.43 It means Fig.42 FIG. 20 shows the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.44 Yes means Figure 1 An expanded circuit diagram (No. 21) of the operating state of the system in the second startup heater mode (battery cooling) is shown. Fig.45 It means Fig.44 FIG. 21 shows the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.46 Yes means Figure 1 An expanded circuit diagram (No. 22) of the operating state of the system in the second startup heater mode (battery heating) is shown. Fig.47 It means Fig.46 FIG. 22 shows the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.48 Yes means Figure 1 The expanded circuit diagram (No. 23) of the operating state of the system in the first radiator water flow mode is shown. Fig.49 It means Fig.48 FIG. 23 shows the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. Fig.50 Yes means Figure 1 The expanded circuit diagram (No. 24) of the operating state of the system in the second radiator water flow mode is shown. Fig.51 It means Fig.50 FIG. 24 shows the switching states of the valves of the circuit switching device corresponding to the structure of the heating medium circuit shown. DETAILED DESCRIPTION

[0015] Hereinafter, one embodiment of the present invention will be described with reference to the drawings. [Implementation Method] Figure 1 and Figure 2 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 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 mounted on the vehicle, in addition to air conditioning functions such as cooling and heating, dehumidification, and ventilation of the cabin 8 where passengers are seated. The act of adjusting to an appropriate temperature or humidity, or managing the vehicle-mounted devices to an appropriate temperature is generally 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 battery device 6 is charged from an external power supply when the vehicle is stopped.

[0016] Figure 1 The circuit diagram of the temperature control system 1 shown in FIG. 1 shows a circuit switching device 30. As described below, the circuit switching device 30 includes a plurality of valves. Figure 2 The plurality of valves of the circuit switching device 30 are shown in expanded form.

[0017] 〔Overall structure〕 like Figure 2 As shown, 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. Furthermore, the temperature control system 1 preferably includes a sensor (not shown) for detecting physical quantities such as the outside air temperature, the temperature of the air blown into the machine room 8, the temperature of the heating medium, and the temperature or pressure of the refrigerant.

[0018] The temperature control system 1 has a plurality of operation modes selected by the occupant or the control device 5. These operation modes are formed based on the structure provided to the heating medium circuit 20 corresponding to the switching state of each valve provided by the circuit switching device 30. In this embodiment, 24 operation modes No. 1 to No. 24 set in the same heating medium circuit 20 are exemplified ( Figure 4 to Figure 51 ).

[0019] 〔Refrigerant circuit structure〕 like Figure 2 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.

[0020] 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.

[0021] 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.

[0022] 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 based on a command from the control device 5. Alternatively, a capillary tube can be used instead of the expansion valve 13.

[0023] 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 .

[0024] 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 2In 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.

[0025] 〔Structure of the heat carrier circuit〕 The heating medium circuit 20 is configured to circulate a heating medium that can exchange heat with the refrigerant through the condenser 12 or the evaporator 14. The heating 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 heating medium sealed in the heating medium circuit 20 is a liquid such as water or salt water that is maintained in a liquid phase and circulated in the heating medium circuit 20. Examples of the salt water include a mixed liquid of water and propylene glycol or a mixed liquid of water and ethylene glycol.

[0026] The heat carrier circuit 20 is shown as an expanded circuit diagram. Figure 2 As shown in an example of the structure in FIG, 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 as indoor heat exchangers, a battery pack 6, a first switching valve 31, a second switching valve 32, a third switching valve 33, a first battery switching valve 34, and a second battery switching valve 35 are provided. The switching valves 31 to 35 are all equivalent to four-way valves.

[0027] Here, in Figure 2 The first switching valve 31, the second switching valve 32, the third switching valve 33, the first battery switching valve 34 and the second battery switching valve 35 distributed on the heat medium circuit 20 are actually integrated into a circuit switching device 30 ( Figure 1 ).

[0028] The heating medium circuit 20 preferably includes a condenser bypass path 12A for bypassing the heating medium from the condenser 12 and a condenser flow rate regulating valve 12V. The condenser flow rate regulating valve 12V can adjust the flow rate ratio of the heating medium flowing through the condenser 12 and the condenser bypass path 12A. When the flow ratio is changed, the flow rate of the heating medium circulating in the path including the condenser 12 of the heating medium circuit 20 changes. Accordingly, the amount of heat absorbed from the refrigerant to the heating medium in the condenser 12 changes, and the high pressure of the refrigerant circuit 10 changes. As the high pressure rises, the compressor power gradually increases, so the higher the high pressure, the higher the heating capacity. From the perspective of increasing the pressure difference between the low pressure and the high pressure to fully ensure the heating capacity, it is preferred to set the high pressure as high as possible within the range of ensuring the pressure resistance of the housing of the compressor 11 and other equipment.

[0029] The heating medium circuit 20 preferably includes an evaporator bypass path 14A and an evaporator flow rate regulating valve 14V for bypassing the heating medium from the evaporator 14. The evaporator flow rate regulating valve 14V can adjust the flow rate ratio of the heating medium flowing through the evaporator 14 and the evaporator bypass path 14A. When the flow ratio is changed, the flow rate of the heating medium circulating in the path including the evaporator 14 of the heating medium circuit 20 changes. Accordingly, the amount of heat dissipated from the heating medium to the refrigerant in the evaporator 14 changes, and the low pressure of the refrigerant circuit 10 changes. As the relationship between low pressure and compressor power, the compressor power is a mountain-shaped curve with a set low pressure, such as 1 MPa, as the peak on the horizontal axis. For example, between 0.1 MPa and 1 MPa, the increase in power caused by the increase in the density of the refrigerant sucked into the compressor 11 is greater than the decrease in power caused by the decrease in enthalpy difference, so the power of the compressor 11 increases, and the heating capacity based on the heat corresponding to the power of the compressor 11 also increases. Since the low pressure decreases slowly from the peak, even if it exceeds the peak, the rate of change is small, for example, it is allowed to reach 1.2 MPa.

[0030] 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.

[0031] The first pump 21 of the present embodiment is disposed between the outlet of the evaporator 14 and the second switching valve 32. Furthermore, the second pump 22 of the present embodiment is disposed between the outlet of the condenser 12 and the third switching valve 33.

[0032] 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.

[0033] 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 described later.

[0034] 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 .

[0035] When the temperature control system 1 does not have a dehumidification and heating mode, the heating medium circuit 20 may have only one indoor heat exchanger (for example, 25 - 1 ).

[0036] 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 .

[0037] 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.

[0038] 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 41 and 42 configured so that the battery device 6 and the heating medium can exchange heat directly or indirectly via air or the like. The first battery switching valve 34 switches the first heat exchange circuit 41 between open and closed. The second battery switching valve 35 switches the second heat exchange circuit 42 between open and closed.

[0039] The heating medium circuit 20 may also include an indoor heat exchanger bypass path 26 (not shown) for bypassing the heating medium from the indoor heat exchanger 25. In this case, when the air conditioning in the machine room 8 is not performed, the heating medium bypassing from the indoor heat exchanger 25 via the indoor heat exchanger bypass path 26 can be supplied to the battery device 6.

[0040] 〔Structure and function of circuit switching device〕 Figure 3 (a) and Figure 5The circuit switching device 30 shown is configured to be able to switch the structure of the heating medium circuit 20 by switching the flow of the heating medium using one or more valves among the valves 31 to 35 . The circuit switching device 30 includes a plurality of valves 31 to 35 ( Figure 5 ), which is equivalent to Figure 2 The first switching valve 31 , the second switching valve 32 , the third switching valve 33 , the first battery switching valve 34 , and the second battery switching valve 35 shown; a plurality of external ports a to l; and a driving unit (not shown) drive the valve bodies of the valves 31 to 35 . The valves 31 to 35 , the external ports a to l , and the driving unit are integrated as a single component.

[0041] Each of the valves 31 to 35 includes four ports, namely, A, B, C, and D. By using a plurality of valves 31 to 35 each including the same number of ports, cost reduction can be achieved by commonalization of components. The valve bodies of the valves 31 to 35 of this embodiment are configured to be independently driven by a driving unit (not shown). The valves 31 to 35 are driven by independent driving shafts, and are not linked to the operation of other valves. Based on the control command issued by the control device 5 , the drive unit can provide each valve with a switching state corresponding to the control command.

[0042] Figure 3 (b) is a diagram showing the switching state of the valve 31 corresponding to the first switching valve 31. The switching state of the valve 31 includes three types. Figure 3 (c) is a diagram showing a switching state common to the second switching valve 32 and the third switching valve 33. There are four types of switching states of the valves 32 and 33. Figure 3 (d) is a diagram showing a switching state common to the first battery switching valve 34 and the second battery switching valve 35. The valves 34 and 35 have two switching states.

[0043] The external ports a to l are connected to the ports of the valves 31 to 35 and are connected to the flow path of the heating medium circuit 20 outside the circuit switching device 30. Figure 2 The positions a to l shown correspond. like Figure 1 As shown in FIG. 1 , the external port a is connected to the inflow side of the condenser flow rate regulating valve 12V. The connection destinations of the external ports a to l are as follows.

[0044] a: Inflow side of condenser flow control valve 12V b: Discharge side of the second pump 22 c: Discharge side of the first pump 21 d: Inflow side of evaporator flow control valve 14V e: Outlet side of the second indoor heat exchanger 25-2 f: Inlet side of the second indoor heat exchanger 25-2 g: Outlet side of the first indoor heat exchanger 25-1 h: Inlet side of the first indoor heat exchanger 25-1 i: Outflow side of the battery device 6 j: Inflow side of the battery device 6 k: outlet side of outdoor heat exchanger 23 l: Inlet side of outdoor heat exchanger 23

[0045] Figure 5 , Figure 7 , Figure 9 to Figure 51 2 shows an example of mutual connection of the external ports a to l and the valves 31 to 35 . Figure 1 The external port a shown with Figure 5 The same also applies to external ports b to l. As shown in the example in the figure, the external ports a to l of the circuit switching device 30 can be arranged in the same direction. For example, the external ports a to d are arranged on one side of the housing of the circuit switching device 30, and the external ports e to k are arranged on the other side of the housing.

[0046] exist Figure 5 , Figure 7 , Figure 9 to Figure 51 In each of the figures, the structure of the connection line (path of the heat medium) connecting the valves 31 to 35 and the external ports a to l to each other is the same. According to the switching states of the valves 31 to 35 , a path corresponding to the operation mode is provided in the heating medium circuit 20 .

[0047] refer to Figure 5 , an example of the flow of the heat medium is described. Figure 5 The valve body of the valve 32 shown is switched to a state where ports A and C are open and ports B and D are closed. The external port c connected to port C of the valve 32 is connected to the discharge side of the first pump 21. Therefore, the heat medium flows from the external port c through ports C and A of the valve 32 toward the external port h. In addition, the direction of the heat medium flow is determined by the positional relationship between each external port a to l and the first pump 21 and the second pump 22.

[0048] The circuit switching device 30 constitutes a part of the heat carrier circuit 20. Figure 4As shown, the flow of the heat carrier from the external port c through the ports C and A of the valve 32 and reaching the external port h in the low-pressure side circuit C1 is equivalent to the flow from the discharge side (external port c) of the first pump 21 through the second switching valve 32 toward the inlet side (external port h) of the first indoor heat exchanger 25-1. The closed ports B and D of the valve 32 are connected to Figure 4 The unused section corresponds to the unused section shown by the dotted line in the development circuit diagram of FIG. 1 . In the unused section, the heating medium is not pumped by the pump 21 or the pump 22.

[0049] Figure 5 The valve body of the valve 31 shown is switched to a state where ports A and C are open and ports B and D are open. Figure 5 The valve bodies of the valves 34 and 35 shown are switched to a state where ports B and C are open. Furthermore, the valve body of the valve 33 is switched to a state where ports C and D are open and ports A and B are closed. As described above, the valve body of the valve 32 is switched to a state where ports A and C are open and ports B and D are closed. According to the states of these valves 31 to 35, when the heat medium of the low-pressure side circuit C1 flows into the inside of the circuit switching device 30 from the external port c and flows out from the external port h to the outside of the circuit switching device 30 through the valve 32, it flows in the first indoor heat exchanger 25-1 and flows into the valve 34 from the external port g. Then, the heat medium flows out from the external port d through the ports C and B of the valve 34, and then returns to the external port c after flowing through the evaporator 14. On the other hand, the heat medium of the high-pressure side circuit C2 flows from the external port b connected to the discharge side of the second pump 22 to the external port l through the ports C and D of the valve 33. The heat medium flowing out from the external port l flows into the valve 31 from the external port k via the outdoor heat exchanger 23, and reaches the external port a through the ports D and B of the valve 31 and the ports C and B of the valve 35. Then, the heat medium returns to the external port b after flowing through the condenser 12.

[0050] Figure 5 The switching states of the valves 31 to 35 in the cooling mode are shown. The expansion circuit diagram of the cooling mode is equivalent to Figure 4 The same operation mode is denoted by the same number (for example, No. 1 and No. 1). The switching state of each switching valve 31 to 35 is shown in the vicinity of the developed circuit diagram. In other operation modes (No.2 to No.24), Figure 4 and Figure 5 In the cooling mode (No. 1) shown in the figure, the flow of the heating medium is switched according to the switching state of each valve 31 to 35 .

[0051] If the number of operation modes is small, the number of valves provided in the circuit switching device 30 may be smaller than the number of valves 31 to 35 in the present embodiment. Alternatively, the number of ports of each valve of the circuit switching device 30 may be smaller than the number of ports A to D in the present embodiment, or the number of external ports may be smaller than the number of external ports r to l in the present embodiment. On the other hand, if the number of operation modes is large, the number of valves provided in the circuit switching device 30, the number of ports of each valve, and the number of external ports may be large compared to the present embodiment. The circuit switching device 30 may include a plurality of valves having different numbers of ports.

[0052] [Description of each operation mode] The operation modes of the temperature control system 1 are roughly classified into the following based on the difference in the structure of the heating medium circuit 20 . Parallel circuit: In order to implement the operation modes No.1 to No.15 ( Figure 4 to Figure 33 ), the heat medium circuit 20 is configured to be able to set the low-pressure side circuit C1 and the high-pressure side circuit C2 in parallel according to the switching state of the valves 31 to 35 by the circuit switching device 30. The low-pressure side circuit C1 includes at least an evaporator 14 , and the high-pressure side circuit C2 includes at least a condenser 12 . The solid line indicates the flow of the relatively low-temperature heating medium flowing in the low-pressure side circuit C1. The one-dot chain line indicates the flow of a relatively high-temperature heating medium flowing in the high-pressure side circuit C2. The low-temperature heat medium is pumped by the first pump 21 , and the high-temperature heat medium is pumped by the second pump 22 .

[0053] Series circuit: In order to implement the operation modes No.16 to No.22 ( Figures 34 to 48 ), the heat medium circuit 20 is configured to be able to set the series circuit CC according to the switching state of the valves 31 to 35 by the circuit switching device 30. The series circuit CC comprises at least an evaporator 14 and a condenser 12 which are arranged in series with respect to the flow of the heat medium. The solid line indicates the flow of the heating medium from flowing out of the evaporator 14 to flowing into the condenser 12 . The one-dot chain line indicates the flow of the heating medium from flowing out of the condenser 12 to flowing into the evaporator 14 .

[0054] Single circuit: In order to implement the operation modes No.23 and No.24 ( Figures 49 to 51), the heat medium circuit 20 is configured to be able to set one of the low-pressure side circuit C1 and the high-pressure side circuit C2 according to the switching state of the valves 31 to 35 by the circuit switching device 30. The low-pressure side circuit C1 includes at least an evaporator 14 , and the high-pressure side circuit C2 includes at least a condenser 12 . The solid line indicates the flow of the relatively low-temperature heating medium flowing in the low-pressure side circuit C1. The one-dot chain line indicates the flow of a relatively high-temperature heating medium flowing in the high-pressure side circuit C2. The low-temperature heat medium is pumped by the first pump 21 , and the high-temperature heat medium is pumped by the second pump 22 .

[0055] Hereinafter, operation modes No. 1 to No. 24 of the temperature control system 1 will be described in sequence. In the following description, matters different from the operation mode already described will be mainly described.

[0056] No.1 Cooling Mode: Figure 4 , 5 The low-pressure circuit C1 includes an indoor heat exchanger 25 in addition to the evaporator 14 . The high-pressure side circuit C2 includes an outdoor heat exchanger 23 in addition to the condenser 12 . In cooling mode, the heat carrier circulates in the low-pressure side circuit C1 and the high-pressure side circuit C2 respectively.

[0057] The heat medium of the low-pressure side circuit C1 is cooled by the evaporator 14 transferring heat to the refrigerant. The heat medium flowing out of the evaporator 14 is supplied to the first indoor heat exchanger 25-1 via the valve 32 (of the circuit switching device 30). The heat exchange between the heat medium and the air in the first indoor heat exchanger 25-1 cools the interior of the machine room 8. The heat medium flowing out of the first indoor heat exchanger 25-1 flows into at least the evaporator 14 and the evaporator 14 in the evaporator bypass path 14A via the valve 34.

[0058] On the other hand, when the heat medium in the high-pressure side circuit C2 absorbs heat from the refrigerant in the condenser 12, it dissipates heat to the outside air through the valve 33 and the outdoor heat exchanger 23. The heat medium flowing out of the outdoor heat exchanger 23 flows through the valves 31 and 35 and flows into at least the condenser 12 and the condenser 12 in the condenser bypass path 12A.

[0059] No.2 Cooling mode (battery cooling): Figure 6 , 7 The difference from No. 1 is that the storage battery device 6 is cooled. In order to maintain the efficiency of charge and discharge and prevent degradation, the storage battery device 6 is preferably maintained in an appropriate temperature range.

[0060] The heating medium flowing out of the first indoor heat exchanger 25-1 is supplied to the battery device 6 through ports C and D of the valve 34 (of the circuit switching device 30) to cool the battery device 6. The heating medium that absorbs heat from the battery device 6 flows to the evaporator 14 through the other ports A and B of the valve 34, for example, the entire flow rate flows into the evaporator 14. When air conditioning is not required in the machine room 8, the operation of the indoor air-sending fan 25A may be stopped. The same applies to other operation modes.

[0061] No.3 Dehumidification and heating mode: Figure 8 , 9 The low-pressure side circuit C1 includes a first indoor heat exchanger 25 - 1 in addition to the evaporator 14 . The high-pressure side circuit C2 includes a second indoor heat exchanger 25 - 2 and an outdoor heat exchanger 23 in addition to the condenser 12 . In the first dehumidification and heating mode, the heating medium circulates in the low-pressure side circuit C1 and the high-pressure side circuit C2 respectively.

[0062] The heating medium flowing out of the evaporator 14 is supplied to the first indoor heat exchanger 25-1 via the valve 32. The heating medium flowing out of the condenser 12 is supplied to the second indoor heat exchanger 25-2 through the respective ports of the valve 33, and is also supplied to the outdoor heat exchanger 23.

[0063] In the first dehumidification and heating mode, heat is dissipated from the heat medium to the outside air through the outdoor heat exchanger 23, and dehumidified heated air is supplied into the machine room 8. According to the first dehumidification and heating mode, the cooling capacity and the dehumidification capacity can be improved compared with the second and third dehumidification and heating modes.

[0064] The air transported by the indoor air blower 25A toward the first and second indoor heat exchangers 25-1 and 25-2 is cooled to below the dew point by the low-temperature heat medium flowing in the first indoor heat exchanger 25-1 and dehumidified, and then heated by the high-temperature heat medium flowing in the second indoor heat exchanger 25-2 and blown into the machine room 8.

[0065] No.4 Dehumidification and heating mode 1 (battery cooling): Fig.10 , 11 The difference from No. 3 is that the battery device 6 is cooled. Similar to No. 2, the heating medium flowing out of the first indoor heat exchanger 25 - 1 is supplied to the battery device 6 through the port of the valve 34 .

[0066] No.5 2nd Dehumidification and Heating Mode: Fig.12 ,13 Unlike the first dehumidification and heating mode of No. 3, the low-temperature heating medium of the low-pressure side circuit C1 is also supplied to the outdoor heat exchanger 23, so that heat is absorbed from the outside air to the heating medium. As a result, a heat pump operation can be performed to extract heat from the outside air to a higher temperature heating medium, thereby improving the heating capacity.

[0067] No.6 2nd dehumidification and heating mode (battery cooling): Fig.14 , 15 The difference with respect to No. 5 is that the battery device 6 is cooled. As with No. 2, the heating medium flowing out of the first indoor heat exchanger 25-1 is supplied to the battery device 6 through the port of the valve 34, thereby cooling the battery device 6. By recovering the waste heat from the battery device 6 to the heating medium, the heat input from the heating medium to the refrigerant in the evaporator 14 can be increased, thereby improving the heating capacity.

[0068] No.7 2nd dehumidification and heating mode (battery heating): Fig.16 , 17 The difference from No. 5 is that the battery device 6 is heated. The heating medium flowing out of the second indoor heat exchanger 25 - 2 passes through the valve 31 and is supplied to the battery device 6 through the port of the valve 35 . The control device 5 can determine which mode, No. 6 or No. 7, to use to temperature-control the battery device 6 based on, for example, the target temperature of the battery device 6 and the detected temperature of the heating medium.

[0069] No.8 Dehumidification and heating mode 3: Fig.18 , 19 Depending on the air conditioning load or the outside air temperature, the heating medium may not be supplied to the outdoor heat exchanger 23 as in the third dehumidification and heating mode. In the 3rd dehumidification and heating mode, such as No.9( Fig. 20 , 21 ), the battery device 6 can also be cooled, such as No. 10 ( Fig. 22 , 23 ) as shown, the battery device 6 can also be heated.

[0070] No.11 Heat Pump Mode: Fig.24 and Fig.25 The low-pressure side circuit C1 includes an evaporator 14 and an outdoor heat exchanger 23 . The high-pressure side circuit C2 includes the condenser 12 and the second indoor heat exchanger 25 - 2 . In heat pump mode, the heat carrier circulates in the low-pressure side loop C1 and the high-pressure side loop C2 respectively.

[0071] Contrary to the cooling mode No. 1, the low-temperature heat medium indicated by the solid line is supplied to the outdoor heat exchanger 23, and the high-temperature heat medium indicated by the one-dot chain line is supplied to the indoor heat exchanger 25-2. The heating medium heated by the condenser 12 is supplied to the second indoor heat exchanger 25 - 2 through the valve 33 and is used for heating the machine room 8 . On the other hand, the heat medium flowing out of the evaporator 14 is supplied to the outdoor heat exchanger 23 through the valve 32, and absorbs heat from the outside air. The heat medium flowing out of the outdoor heat exchanger 23 returns to the evaporator 14 through the valves 31 and 34, and dissipates heat to the refrigerant. Therefore, the heat of the outside air is extracted into the high-temperature heat medium through the refrigerant circuit 10.

[0072] In heat pump mode, such as No.12( Fig.26 , 27 ) as shown, the battery device 6 can also be cooled, such as No. 13 ( Fig.28 , 29 ) as shown, the battery device 6 can also be heated. According to the cooling of the battery device 6, by recovering the waste heat from the battery device 6 to the heating medium, the heat input of the heating medium to the refrigerant in the evaporator 14 can be increased, thereby improving the heating capacity.

[0073] No.14 Start the heat pump mode: Fig.30 , 31 The start-up heat pump mode is applicable to the start-up of the temperature control system 1. In order to avoid the ejection of cold air into the machine room 8 from the start of the refrigeration cycle to the stable state, and to avoid the rapid temperature increase of the heat medium by heat dissipation to the air in the machine room 8, the heat medium can be detoured from the second indoor heat exchanger 25-2.

[0074] Therefore, when the heat pump mode is activated, the high-pressure side circuit C2 includes the indoor heat exchanger bypass path 26 in addition to the condenser 12 . The heating medium flowing out of the condenser 12 flows into the indoor heat exchanger bypass path 26 through the valve 33. Even if the indoor air blower 25A is operating at this time, the heating medium does not flow in the indoor heat exchanger 25-2, so it is possible to avoid the heat dissipation of the heating medium to the air. In addition, by flowing in the indoor heat exchanger bypass path 26, the pressure loss can be suppressed compared with the case of flowing in the second indoor heat exchanger 25-2. For example, when the temperature of the heating medium reaches a predetermined temperature or higher, the control device 5 can switch the operation mode from the startup heat pump mode to the No. 11 heat pump mode.

[0075] In the heat pump start mode, such as No.15 ( Fig.32 , Fig.33 ) as shown, the battery device 6 can also be heated.

[0076] No.16 Heater Mode: Fig.34 , 35 The heater mode is suitable for situations where the outside air temperature is significantly below freezing (e.g., below -20°C). Since the outside air temperature is very low, the heater mode allows the heat medium to bypass the outdoor heat exchanger 23 via the outdoor heat exchanger bypass path 24, thereby avoiding heat dissipation from the heat medium to the outside air, and performs heating operation using the compressor 11 as a heat source.

[0077] The series circuit CC for the heater mode is composed of the condenser 12, the second indoor heat exchanger 25-2 and the evaporator 14 arranged in series. The heat medium circulates in the series circuit CC in the order of the condenser 12, the second indoor heat exchanger 25-2 and the evaporator 14.

[0078] In the heater mode, the solid line and the dashed line indicating the flow of the heating medium indicate a decrease in the temperature of the heating medium due to the flow through the evaporator 14 and an increase in the temperature of the heating medium due to the flow through the condenser 12 .

[0079] According to the series circuit CC, the heating medium flowing out of the condenser 12 flows through the second indoor heat exchanger 25-2 through the valve 33, and heats the interior of the machine room 8 by heat exchange with the air. The heating medium flowing out of the second indoor heat exchanger 25-2 flows to the evaporator 14 through the ports C and A of the valve 31, and flows into at least the evaporator 14 and the evaporator 14 in the evaporator bypass path 14A, thereby dissipating heat to the refrigerant. Then, the heating medium flowing out of the evaporator 14 flows through the valve 32 and in the outdoor heat exchanger bypass path 24 , and when it flows into at least the condenser 12 and the condenser 12 in the condenser bypass path 12A, it absorbs heat from the refrigerant.

[0080] According to the heater mode, the low pressure of the refrigerant in the refrigerant circuit 10 at low outdoor temperature increases compared to the heat pump mode due to the heat transfer effect of the heat medium through the condenser 12 and the second indoor heat exchanger 25-2 to the refrigerant in the evaporator 14. Due to the increase in low pressure, the density of the refrigerant sucked by the compressor 11 increases, and the refrigerant circulation amount increases, so the heating capacity can be improved. Furthermore, if the condenser flow rate regulating valve 12V is used to reduce the flow rate of the heating medium flowing into the condenser 12 to increase the high pressure of the refrigerant circuit 10, the volumetric efficiency can be improved and the heating capacity can be improved.

[0081] In the heater mode, the low pressure of the refrigerant circuit 10 can be controlled within a specified range without being too low or too high by adjusting the flow rate of the heating medium flowing into the evaporator 14 using the evaporator flow regulating valve 14V. Similarly, the high pressure of the refrigerant circuit 10 can be controlled within a specified range by adjusting the flow rate of the heating medium flowing into the condenser 12 using the condenser flow regulating valve 12V. Thereby, the heating capacity can be adjusted according to the air-conditioning load.

[0082] No.17 Heater mode (battery cooling): Fig.36 , 37 This mode corresponds to the first compressor heat source mode. In order to cool the battery device 6 as the second temperature control device, the battery device 6 is included in the series circuit CC. Other than this, it is the same as the heater mode No. 16. The heat medium that has transferred heat to the refrigerant through the evaporator 14 flows into the outdoor heat exchanger bypass path 24 from the valve 32 and is supplied to the battery device 6 through the ports C and D of the valve 35. The heat medium that has cooled the battery device 6 flows into the condenser 12 through the ports A and B of the valve 35.

[0083] No.18 Heater mode (battery heating): Fig.38 , 39 This mode corresponds to the second compressor heat source mode. In order to heat the battery device 6 as the second temperature control device, the battery device 6 is included in the series circuit CC. Other than this, it is the same as the heater mode of No. 16. The heat medium that absorbs heat from the refrigerant in the condenser 12 flows into the second indoor heat exchanger 25-2 through the valve 33, and is supplied to the battery device 6 through the ports C and A of the valve 31 and the ports C and D of the valve 34. The heat medium that heats the battery device 6 flows into the evaporator 14 through the ports A and B of the valve 34.

[0084] No.19 1st start heater mode: Fig.40 , 41 This mode is equivalent to the first compressor heat source startup mode and is suitable for startup of the temperature control system 1. If the outside air temperature is significantly lower than 0°C and the temperature control system 1 is started at the same low temperature as the outside air temperature, the low pressure of the refrigerant circuit 10 decreases due to the cooling of the refrigerant by the heat medium, and the evaporation temperature of the refrigerant is lower than the outside air temperature. Therefore, in the first activation heater mode, heat absorbed from the outside air to the heating medium is transferred to the refrigerant by the outdoor heat exchanger 23 , thereby giving priority to raising the temperature of the refrigerant over heating the interior of the machine room 8 .

[0085] In the first startup heater mode, the heating medium may not flow into the second indoor heat exchanger 25-2, but may flow into the outdoor heat exchanger 23. In the series circuit CC used for the first startup heater mode, the evaporator 14, the outdoor heat exchanger 23, and the condenser 12 are arranged in series. The heating medium circulates in the series circuit CC in the order of the evaporator 14, the outdoor heat exchanger 23, and the condenser 12.

[0086] In order to further promote the temperature rise of the refrigerant, it is more preferable to make the heat medium bypass the condenser 12. In this case, although not shown in the figure, the heat medium flowing out of the evaporator 14 flows into the outdoor heat exchanger 23 from the valve 32, flows to the condenser 12, and flows into the condenser bypass path 12A at a total flow rate or a part of the flow rate through the flow adjustment performed by the condenser flow adjustment valve 12V. In this way, it is possible to suppress the heat medium from absorbing heat from the refrigerant, so that the refrigerant circuit 10 can reach stable operation as soon as possible.

[0087] According to the first heater startup mode, the heat absorbed from the outside air to the heating medium is continuously transferred to the refrigerant while suppressing the heat exchange between the indoor air and the heating medium and the heat exchange between the heating medium and the refrigerant, thereby gradually increasing the low pressure of the refrigerant circuit 10 and the evaporation temperature. In this process, the temperature of the heating medium that exchanges heat with the refrigerant also increases. The control device 5 can make the temperature control system 1 shift to the No. 16 heater mode when the heating medium approaches the outside air temperature.

[0088] No.20 Second start heater mode: Fig.42 , 43 This mode is equivalent to the second startup compressor heat source mode and is suitable for the startup of the temperature control system 1. This mode is different from the first startup heater mode No. 19. Although it does not absorb heat from the outside air to the heating medium, it is the same as the first startup heater mode in that the heating medium is not supplied to the indoor heat exchanger 25-2 in order to avoid heat exchange between the indoor air and the heating medium.

[0089] In the series circuit CC used in the second startup heater mode, the condenser 12, the indoor heat exchanger bypass 26 and the evaporator 14 are arranged in series. The heating medium circulates in the series circuit CC in the order of the condenser 12, the indoor heat exchanger bypass 26 and the evaporator 14.

[0090] Similar to No. 19, in order to further promote the temperature rise of the refrigerant, it is more preferable to make the heating medium detour from the condenser 12 .

[0091] According to the second activation heater mode, similarly to the first activation heater mode, the temperature increase of the refrigerant can be promoted by avoiding heat exchange between the air in the turbine chamber 8 and the heating medium. The second startup heater mode can be performed after the first startup heater mode is started up, and then the temperature control system 1 is started up. For example, when the temperature of the heating medium rises due to the implementation of the first startup heater mode and the heating medium cannot absorb heat from the outside air, the control device 5 can switch the operation mode from the first startup heater mode to the second startup heater mode if the low pressure of the refrigerant circuit 10 does not reach a specified value.

[0092] In the second heater start mode, such as No.21 ( Fig.44 , Fig.45 ) as shown, the battery device 6 can be cooled, such as No.22 ( Fig.46 , Fig.47 ) as shown, the battery device 6 can be heated.

[0093] When the heat medium flows through the indoor heat exchanger bypass path 26 from the valve 33 as in the second heater startup mode, the heat medium does not flow through the indoor heat exchanger 25-2 even when the indoor air blower 25A is operating, thereby preventing the heat medium from dissipating to the air. Furthermore, by flowing through the indoor heat exchanger bypass path 26, the pressure loss can be suppressed compared to the case where the heat medium flows through the second indoor heat exchanger 25-2.

[0094] When the heating medium circuit 20 does not include the indoor heat exchanger bypass path 26, the heating medium is allowed to flow into the indoor heat exchanger 25-2 from the valve 33. In this case, the indoor blower 25A may be stopped to suppress heat exchange with air.

[0095] No.23 1st radiator water flow mode: Fig.48 , 49 The outdoor heat exchanger 23 can dissipate heat from the heating medium to the outside air and cool the battery device 6. In this case, the low-pressure circuit C1 includes the evaporator 14, the outdoor heat exchanger 23, and the battery device 6. The high-pressure circuit C2 is not used. The heating medium in the low-pressure circuit C1 is pumped by the first pump 21 and circulates through the evaporator 14, the outdoor heat exchanger 23, and the battery device 6. The order in which the heating medium circulates through the evaporator 14, the outdoor heat exchanger 23, and the battery device 6 is not limited.

[0096] When the battery device 6 can be cooled based on the temperature of the heating medium, the outside air temperature, the target temperature of the battery device 6, etc., the battery device 6 can be temperature-controlled while suppressing power consumption by stopping the compressor 11.

[0097] No.24 2nd radiator water flow mode: Fig.50 , 51 The battery pack 6 can be heated while absorbing heat from the outside air to the heating medium through the outdoor heat exchanger 23. In this case, the high-pressure side circuit C2 includes the condenser 12, the outdoor heat exchanger 23, and the battery device 6. The low-pressure side circuit C1 is not used. The heating medium in the high-pressure circuit C2 is pumped by the second pump 22 and circulates through the condenser 12, the outdoor heat exchanger 23, and the battery pack 6. The order in which the heating medium circulates through the condenser 12, the outdoor heat exchanger 23, and the battery pack 6 is not limited.

[0098] As in No. 23, it is preferable to stop the compressor 11 based on the temperature of the heating medium, the outside air temperature, the target temperature of the battery device 6, and the like.

[0099] [Main effects of this embodiment] By providing the circuit switching device 30 configured to be able to switch the heating medium circuit 20 according to the switching state of the valves 31 to 35, all the switching valves 31 to 35 on the heating medium circuit 20 required to realize various operation modes are integrated. Therefore, compared with the case where various paths are set by combining individual valves distributed on the heating medium circuit 20, it is possible to avoid complication of the structure, suppress the volume to ensure vehicle-mountability, and save the man-hours for assembling joints and hoses, etc., to improve productivity.

[0100] Furthermore, the series circuit CC in which the evaporator 14 and the condenser 12 are arranged in series can be set in the heating medium circuit 20 by the circuit switching device 30. According to this series circuit CC, the heating medium flowing in the condenser 12 is sequentially heated by the refrigerant, so that the temperature of the heating medium can be increased more quickly than when the heating medium flows in parallel into the condenser 12 and the evaporator 14. Furthermore, since the circulation amount of the heating medium in the indoor heat exchanger 25 is large, the heat exchange amount between the heating medium and the air becomes large.

[0101] Furthermore, according to the heater mode based on the series circuit CC, the heat medium passing through the condenser 12 and the indoor heat exchanger 25-2 dissipates heat to the refrigerant through the evaporator 14, thereby increasing the low pressure of the refrigerant circuit 10 compared to the case where the heat medium is absorbed from the outside air, and the density of the refrigerant sucked into the compressor 11 increases, thereby increasing the circulation flow rate of the refrigerant. The increase in the circulation flow rate of the refrigerant increases the heat exchange capacity, thereby improving the heating capacity. Therefore, even when it is difficult to secure a heat source due to low outside air temperature, heating capacity can be secured.

[0102] 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.

[0103] [Note] [1] A vehicle temperature control system 1, 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 comprises: 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; 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; The temperature control device 6, 25 is equivalent to the temperature control object heated or cooled by the heat carrier, or is used to heat or cool the temperature control object; and The circuit switching device 30 includes a plurality of valves 31 to 35 and is configured to switch the heating medium circuit 20 by switching the flow of the heating medium through the valves 31 to 35, and The heating medium circuit 20 is configured to be able to set a series circuit CC including the low-pressure side heat exchanger 14 and the high-pressure side heat exchanger 12 arranged in series, and The heating medium circuit ( 20 ) is provided with the series circuit CC corresponding to the switching states of the plurality of valves ( 31 ˜ 35 ).

[0104] [2] The vehicle temperature control system 1 according to item [1], wherein: The plurality of valves 31 to 35 are configured to be individually drivable.

[0105] [3] The vehicle temperature control system 1 according to [1] or [2], wherein: The vehicle temperature control system 1 has a compressor heat source mode as an operation mode. In the compressor heat source mode, the heat medium circulates in the series loop CC in the order of the high-pressure side heat exchanger 12 , the temperature control devices 6 , 25 , and the low-pressure side heat exchanger 14 .

[0106] [4] The vehicle temperature control system according to any one of [1] to [3], comprising: A low-pressure side bypass path allows the heat medium to bypass the low-pressure side heat exchanger; and The low-pressure side flow rate regulating valve is configured to be able to adjust a flow rate ratio of the heating medium in the low-pressure side heat exchanger and the low-pressure side bypass path.

[0107] [5] The vehicle temperature control system according to any one of [1] to [4], comprising: A high-pressure side bypass path allows the heat medium to bypass the high-pressure side heat exchanger; and The high-pressure side flow rate regulating valve is configured to be able to adjust a flow rate ratio of the heating medium between the high-pressure side heat exchanger and the high-pressure side bypass passage.

[0108] [6] The vehicle temperature control system 1 according to item [3], wherein: The heat carrier circuit 20 has: The first temperature control device 25-1 performs heat exchange between the air as the temperature control object and the heating medium; and The second temperature control device 25-2 is equivalent to the temperature control object. The temperature control system 1 includes a first compressor heat source mode as the compressor heat source mode. In the first compressor heat source mode, the heat medium circulates in the series circuit CC in the order of the high-pressure side heat exchanger 12, the first temperature control device 25-1, the low-pressure side heat exchanger 14, and the second temperature control device 25-2.

[0109] [7] The vehicle temperature control system 1 according to item [3], wherein: The heat carrier circuit 20 has: The first temperature control device 25-1 allows the air as the temperature control object to exchange heat with the heating medium; and The second temperature control device 25-2 is equivalent to the temperature control object. The temperature control system 1 includes a second compressor heat source mode as the compressor heat source mode. In the second compressor heat source mode, the heat medium circulates in the series circuit CC in the order of the high-pressure side heat exchanger 12 , the first temperature control device 25 - 1 , the second temperature control device 25 - 2 , and the low-pressure side heat exchanger 14 .

[0110] [8] The vehicle temperature control system 1 according to any one of [1] to [7], wherein: The temperature control system 1 has a first compressor heat source startup mode as an operation mode. In the first startup compressor heat source mode, the heat medium circulates in the series circuit CC in the order of the high-pressure side heat exchanger 12 , the outdoor heat exchanger 23 , and the low-pressure side heat exchanger 14 .

[0111] [9] The vehicle temperature control system 1 according to item [8], wherein: The heating medium circuit 20 includes a high-pressure side bypass path 12A for allowing the heating medium to bypass the high-pressure side heat exchanger 12. In the first compressor heat source start-up mode, The heating medium circulates in the series circuit CC in the order of at least one of the high-pressure side heat exchanger 12 and the high-pressure side bypass path 12A, the outdoor heat exchanger 23 , and the low-pressure side heat exchanger 14 .

[0112]

[10] The vehicle temperature control system 1 according to any one of [1] to [9], wherein: The temperature control system 1 has a second compressor heat source startup mode as an operation mode. In the second compressor heat source startup mode, the heat medium circulates in the series circuit CC in the order of the high-pressure side heat exchanger 12 and the low-pressure side heat exchanger 14 .

[0113]

[11] The vehicle temperature control system 1 according to item

[10] , wherein: The heating medium circuit 20 includes a high-pressure side bypass path 12A for allowing the heating medium to bypass the high-pressure side heat exchanger 12. In the second compressor heat source mode, The heat medium circulates in the series circuit CC in the order of at least one of the high-pressure side heat exchanger 12 and the high-pressure side bypass path 12A, and the low-pressure side heat exchanger 14 .

[0114]

[12] The vehicle temperature control system 1 according to any one of [1] to

[11] , wherein: The heating medium circuit 20 is configured to be able to set a low-pressure circuit C1 including the low-pressure heat exchanger 14 and a high-pressure circuit C2 including the high-pressure heat exchanger 12 in parallel, and In the heating medium circuit (20), the low-pressure side circuit (C1) and the high-pressure side circuit (C2) are configured in parallel according to the switching states of the plurality of valves (31-35).

[0115]

[13] The vehicle temperature control system 1 according to item

[12] , wherein: The heating medium circuit 20 includes a first indoor heat exchanger 25-1 disposed upstream of the flow of the air and a second indoor heat exchanger 25-2 disposed downstream of the flow of the air, as the temperature control devices 6, 25 for performing heat exchange between the air as the temperature control object and the heating medium. The low-pressure side circuit C1 includes the low-pressure side heat exchanger 14 and the first indoor heat exchanger 25-1. The high-pressure side circuit C2 includes the high-pressure side heat exchanger 12 and the second indoor heat exchanger 25-2. The temperature control system 1 has a dehumidification and heating mode as an operating mode. In the dehumidification and heating mode, the heating medium circulates in the low-pressure side circuit C1 and the high-pressure side circuit C2 respectively.

[0116]

[14] The vehicle temperature control system 1 according to item

[10] or

[13] , wherein: The low-pressure side circuit C1 includes the low-pressure side heat exchanger 14 and the temperature control devices 6 and 25. The high-pressure side circuit C2 includes the high-pressure side heat exchanger 12 and the outdoor heat exchanger 23. The temperature control system 1 has a cooling mode as an operating mode. In the cooling mode, the heat medium circulates in the low-pressure side circuit C1 and the high-pressure side circuit C2 respectively.

[0117]

[15] The vehicle temperature control system 1 according to any one of

[12] to

[14] , wherein: The low-pressure side circuit C1 includes the low-pressure side heat exchanger 14 and the outdoor heat exchanger 23. The high-pressure side circuit C2 includes the high-pressure side heat exchanger 12 and the temperature control devices 6 and 25. The temperature control system 1 has a heat pump mode as an operating mode. In the heat pump mode, the heat medium circulates in the low-pressure side loop C1 and the high-pressure side loop C2 respectively.

[0118]

[16] The vehicle temperature control system 1 according to item

[15] , wherein: The heating medium circuit 20 includes a temperature control device bypass path for allowing the heating medium to bypass the temperature control devices 6 and 25. The high-pressure side circuit C2 includes the high-pressure side heat exchanger 12 and the temperature control device bypass path. The temperature control system 1 has a start-up heat pump mode as the heat pump mode. In the start-up heat pump mode, the heat medium circulates in the low-pressure side circuit C1 and the high-pressure side circuit C2 respectively.

[0119]

[17] The vehicle temperature control system 1 according to any one of [1] to

[16] , wherein: The heating medium circuit 20 is configured to be able to set one of a low-pressure circuit C1 including the low-pressure heat exchanger 14 and a high-pressure circuit C2 including the high-pressure heat exchanger 12. The low-pressure side circuit C1 includes the low-pressure side heat exchanger 14, the outdoor heat exchanger 23 and the temperature control devices 6 and 25. The high-pressure side circuit C2 includes the high-pressure side heat exchanger 12 , the outdoor heat exchanger 23 and the temperature control devices 6 , 25 .

[0120]

[18] The vehicle temperature control system 1 according to any one of [1] to

[17] , wherein: The circuit switching device 30 includes: The plurality of valves 31-35 is at most five four-way valves 31-35; and A maximum of 12 external ports are communicated with the valves 31 to 35 , and are communicated with the flow path of the heating medium circuit 20 outside the circuit switching device 30 .

[0121]

[19] The vehicle temperature control system 1 according to any one of [1] to

[18] , wherein: The circuit switching device 30 has the following ports as the external ports: The first port a is connected to the inlet side of the high-pressure side heat exchanger 12; The second port b is connected to the outlet side of the high-pressure side heat exchanger 12; The third port c is connected to the outlet side of the low-pressure side heat exchanger 14; The fourth port d is connected to the inlet side of the low-pressure side heat exchanger 14; The fifth port e is connected to the outlet side of the temperature control device 6, 25; The sixth port f is connected to the inlet side of the temperature control device 6, 25; The seventh port k is connected to the outlet side of the outdoor heat exchanger 23; and The eighth port 1 is communicated with the inlet side of the outdoor heat exchanger 23.

[0122]

[20] The vehicle temperature control system 1 according to item

[19] , wherein: The heat carrier circuit 20 has: The first temperature control device 6, 25 allows the air as the temperature control object to exchange heat with the heat medium; and The second temperature control device 6, 25 is equivalent to the temperature control object. The circuit switching device 30 has the following ports as the external ports: The fifth port e is connected to the outlet side of the first temperature control device 6, 25; The sixth port f is connected to the inlet side of the first temperature control device 6, 25; The ninth port i is connected to the outlet side of the second temperature control device 6, 25; and The tenth port j is communicated with the inlet side of the second temperature control device 6 , 25 .

[0123]

[21] The vehicle temperature control system 1 according to item

[19] or

[20] , wherein: The heating medium circuit 20 includes a first indoor heat exchanger 25-1 disposed upstream of the flow of the air and a second indoor heat exchanger 25-2 disposed downstream of the flow of the air, as the temperature control devices 6, 25 for performing heat exchange between the air as the temperature control object and the heating medium. The circuit switching device 30 has the following ports as the external ports: The 11th port g is connected to the outlet side of the first indoor heat exchanger 25-1; The 12th port h is connected to the inlet side of the first indoor heat exchanger 25-1; The fifth port e is connected to the outlet side of the second indoor heat exchanger 25-2; and The sixth port f communicates with the inlet side of the second indoor heat exchanger 25 - 2 . Explanation of symbols

[0124] 1- Temperature control system, 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 (High-pressure side bypass path), 12V- Condenser flow control valve (High-pressure side flow control valve), 13- Expansion valve (Decompression section), 14- Evaporator (Low-pressure side heat exchanger), 14A- Evaporator bypass path (Low-pressure side bypass path), 14V- Evaporator flow control valve (Low-pressure side flow control valve), 20- Heat carrier circuit, 21- 1st pump, 22- 2nd pump, 23- Outdoor heat exchange Device, 23A-outdoor air supply fan, 24-outdoor heat exchanger bypass path, 25-indoor heat exchanger (temperature control equipment), 25A-indoor air supply fan, 26-indoor heat exchanger bypass path, 30-circuit switching device, 31-1st switching valve, valve, 32-2nd switching valve, valve, 33-3rd switching valve, valve, 34-1st battery switching valve, valve, 35-2nd battery switching valve, valve, 41-1st heat exchange circuit, 42-2nd heat exchange circuit, A~D-port, a~l-external port, C1-low pressure side circuit, C2-high pressure side circuit, CC-series circuit, U-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 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; An outdoor heat exchanger is used to exchange heat between the external air and the heat carrier; An outdoor heat exchanger bypass path allows the heat medium to bypass the outdoor heat exchanger; The temperature control device is equivalent to the temperature control object heated or cooled by the heat carrier, or is used to heat or cool the temperature control object; and The circuit switching device includes a plurality of valves and is configured to switch the heat medium circuit by switching the flow of the heat medium through the valves. The heat medium circuit is configured to be able to set up a series circuit including the low-pressure side heat exchanger and the high-pressure side heat exchanger arranged in series, and The series circuit corresponding to the respective switching states of the plurality of valves is provided in the heating medium circuit.

2. The vehicle temperature control system according to claim 1, wherein: The plurality of valves are configured to be individually drivable.

3. The vehicle temperature control system according to claim 1, wherein: The temperature control system has a compressor heat source mode as an operating mode, In the compressor heat source mode, the heat carrier circulates in the series circuit in the order of the high-pressure side heat exchanger, the temperature control device and the low-pressure side heat exchanger.

4. The vehicle temperature control system according to claim 1, comprising: A low-pressure side bypass path allows the heat medium to bypass the low-pressure side heat exchanger; and The low-pressure side flow rate regulating valve is configured to be able to adjust a flow rate ratio of the heating medium in the low-pressure side heat exchanger and the low-pressure side bypass path.

5. The vehicle temperature control system according to claim 1, comprising: A high-pressure side bypass path allows the heat medium to bypass the high-pressure side heat exchanger; and The high-pressure side flow rate regulating valve is configured to be able to adjust a flow rate ratio of the heating medium between the high-pressure side heat exchanger and the high-pressure side bypass passage.

6. The vehicle temperature control system according to claim 3, wherein: The heat carrier circuit has: a first temperature control device for performing heat exchange between the air as the temperature control object and the heating medium; and The second temperature control device is equivalent to the temperature control object, The temperature control system includes a first compressor heat source mode as the compressor heat source mode, In the first compressor heat source mode, the heat medium circulates in the series circuit in the order of the high-pressure side heat exchanger, the first temperature control device, the low-pressure side heat exchanger, and the second temperature control device.

7. The vehicle temperature control system according to claim 3, wherein: The heat carrier circuit has: The first temperature control device allows the air as the temperature control object to exchange heat with the heat medium; and The second temperature control device is equivalent to the temperature control object. The temperature control system includes a second compressor heat source mode as the compressor heat source mode, In the second compressor heat source mode, the heat medium circulates in the series circuit in the order of the high-pressure side heat exchanger, the first temperature control device, the second temperature control device, and the low-pressure side heat exchanger.

8. The vehicle temperature control system according to claim 1, wherein: The temperature control system has a first compressor heat source startup mode as an operation mode, In the first startup compressor heat source mode, the heat medium circulates in the series circuit in the order of the high-pressure side heat exchanger, the outdoor heat exchanger, and the low-pressure side heat exchanger.

9. The vehicle temperature control system according to claim 8, wherein: The heating medium circuit includes a high-pressure side bypass path for allowing the heating medium to bypass the high-pressure side heat exchanger. In the first compressor heat source start-up mode, The heat medium circulates in the series circuit in the order of at least one of the high-pressure side heat exchanger and the high-pressure side bypass path, the outdoor heat exchanger, and the low-pressure side heat exchanger.

10. The vehicle temperature control system according to claim 1, wherein: The temperature control system has a second compressor start-up heat source mode as an operation mode, In the second startup compressor heat source mode, the heat medium circulates in the series circuit in the order of the high-pressure side heat exchanger and the low-pressure side heat exchanger.

11. The vehicle temperature control system according to claim 10, wherein: The heating medium circuit includes a high-pressure side bypass path for allowing the heating medium to bypass the high-pressure side heat exchanger. In the second compressor heat source start-up mode, The heat medium circulates in the series circuit in the order of at least one of the high-pressure side heat exchanger and the high-pressure side bypass path, and the low-pressure side heat exchanger.

12. The vehicle temperature control system according to claim 1, wherein: The heat medium circuit is configured to be able to set a low-pressure side circuit including the low-pressure side heat exchanger and a high-pressure side circuit including the high-pressure side heat exchanger in parallel, and In the heating medium circuit, the low-pressure side circuit and the high-pressure side circuit are configured in parallel in accordance with the respective switching states of the plurality of valves.

13. The vehicle temperature control system according to claim 12, wherein: The heating medium circuit includes a first indoor heat exchanger disposed upstream of the flow of the air and a second indoor heat exchanger disposed downstream of the flow of the air, as the temperature control device for exchanging heat between the air as the temperature control object and the heating medium. The low-pressure side circuit includes the low-pressure side heat exchanger and the first indoor heat exchanger. The high-pressure side circuit includes the high-pressure side heat exchanger and the second indoor heat exchanger. The temperature control system has a dehumidification and heating mode as an operating mode. In the dehumidification and heating mode, the heat medium circulates in the low-pressure side circuit and the high-pressure side circuit respectively.

14. The vehicle temperature control system according to claim 12, wherein: The low-pressure side circuit includes the low-pressure side heat exchanger and the temperature control device, The high-pressure side circuit includes the high-pressure side heat exchanger and the outdoor heat exchanger, The temperature control system has a cooling mode as an operating mode, In the cooling mode, the heat carrier circulates in the low-pressure side circuit and the high-pressure side circuit respectively.

15. The vehicle temperature control system according to claim 12, wherein: The low-pressure side circuit includes the low-pressure side heat exchanger and the outdoor heat exchanger. The high-pressure side circuit includes the high-pressure side heat exchanger and the temperature control device, The temperature control system has a heat pump mode as an operating mode, In the heat pump mode, the heat medium circulates in the low-pressure side circuit and the high-pressure side circuit respectively.

16. The vehicle temperature control system according to claim 15, wherein: The heating medium circuit includes a temperature control device bypass path for allowing the heating medium to bypass the temperature control device. The high-pressure side circuit includes the high-pressure side heat exchanger and the temperature control device bypass path, The temperature control system has a start-up heat pump mode as the heat pump mode. In the start-up heat pump mode, the heat medium circulates in the low-pressure side circuit and the high-pressure side circuit respectively.

17. The vehicle temperature control system according to claim 1, wherein: The heating medium circuit is configured to be capable of setting one of a low-pressure circuit including the low-pressure heat exchanger and a high-pressure circuit including the high-pressure heat exchanger. The low-pressure side circuit includes the low-pressure side heat exchanger, the outdoor heat exchanger and the temperature control device. The high-pressure side circuit includes the high-pressure side heat exchanger, the outdoor heat exchanger and the temperature control device.

18. The vehicle temperature control system according to any one of claims 1 to 17, wherein: The circuit switching device comprises: the plurality of valves being a maximum of five four-way valves; and A maximum of 12 external ports are connected to the valve and are connected to the flow path of the heating medium circuit outside the circuit switching device.

19. The vehicle temperature control system according to claim 18, wherein: The circuit switching device has the following ports as the external ports: a first port connected to an inlet side of the high-pressure side heat exchanger; a second port connected to an outlet side of the high-pressure side heat exchanger; a third port connected to the outlet side of the low-pressure side heat exchanger; a fourth port connected to an inlet side of the low-pressure side heat exchanger; a fifth port connected to the outlet side of the temperature control device; a sixth port connected to the inlet side of the temperature control device; a seventh port connected to the outlet side of the outdoor heat exchanger; and The eighth port is communicated with the inlet side of the outdoor heat exchanger.

20. The vehicle temperature control system according to claim 19, wherein: The heat carrier circuit has: The first temperature control device allows the air as the temperature control object to exchange heat with the heat medium; and The second temperature control device is equivalent to the temperature control object. The circuit switching device has the following ports as the external ports: The fifth port is connected to the outlet side of the first temperature control device; The sixth port is connected to the inlet side of the first temperature control device; a ninth port connected to the outlet side of the second temperature control device; and The tenth port is connected to the inlet side of the second temperature control device.

21. The vehicle temperature control system according to claim 19, wherein: The heating medium circuit includes a first indoor heat exchanger disposed upstream of the flow of the air and a second indoor heat exchanger disposed downstream of the flow of the air, as the temperature control device for exchanging heat between the air as the temperature control object and the heating medium. The circuit switching device has the following ports as the external ports: an 11th port, connected to the outlet side of the first indoor heat exchanger; a 12th port, connected to the inlet side of the first indoor heat exchanger; The fifth port is connected to the outlet side of the second indoor heat exchanger; and The sixth port is communicated with the inlet side of the second indoor heat exchanger.

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