Temperature control system and method for controlling a temperature control system

Abstract

Improve the heating start-up performance when executing the heater mode that supplies a heat medium heated by the power of the compressor to the temperature control device at low outside air temperatures. 【Solution means】 The heat medium circuit 20 includes an indoor air conditioning unit 25A, a first pump 21 that pumps the heat medium HM that has passed through the condenser 12 and the indoor air conditioning unit 25A, a three-way valve 26, and a downstream side in the flow direction of the first heat medium flow path L1 from the indoor air conditioning unit 25A and a communication flow path L5 that communicates the downstream side in the flow direction of the second heat medium flow path L2 from the evaporator 14. The control unit 30 operates the first pump 21 to supply the heat medium HM that has passed through the condenser 12 to the indoor air conditioning unit 25A, and combines the heat medium HM that has passed through the indoor air conditioning unit 25A and the heat medium HM that has passed through the evaporator 14 at a first position P1 arranged on the downstream side of the communication flow path L5 and guides them to the three-way valve 26 to provide a temperature control system 100 that executes the heater mode.

Description

Technical Field

[0001] The present disclosure relates to a temperature control system suitable for use in a vehicle and a method for controlling the temperature control system.

Background Art

[0002] Conventionally, a vehicle thermal management system having an operation mode for heating a device to be heated at an early stage at a low outside air temperature is known (see, for example, Patent Document 1). The vehicle thermal management system disclosed in Patent Document 1 arranges a low-pressure side cooling water cooler included in a refrigeration cycle in which a refrigerant circulates in a first cooling water circuit and circulates the cooling water by a first pump, and arranges a high-pressure side cooling water heater included in the refrigeration cycle in a second cooling water circuit and circulates the cooling water by a second pump, thereby performing a heat pump operation.

[0003] When the vehicle thermal management system disclosed in Patent Document 1 executes an operation mode for heating a device to be heated at an early stage at a low outside air temperature, both the first pump and the second pump are operated, and the cooling water cooled by the cooling water cooler and the cooling water heated by the cooling water heater are mixed by a first switching valve and led to a heater core.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in Patent Document 1, when executing an operation mode for heating a device to be heated at an early stage at a low outside air temperature, the cooling water heated by the cooling water heater is mixed with the cooling water cooled by the cooling water cooler and led to the heater core in a state where the temperature has decreased. Therefore, it may take a long time until the temperature supplied to the heater core rises at the start of heating.

[0006] The present disclosure has been made in view of such circumstances, and an object thereof is to provide a temperature control system and a method for controlling the temperature control system capable of improving the heating start-up performance when executing a heater mode in which a heat medium heated by the power of a compressor is supplied to a temperature control device at a low outside air temperature.

Means for Solving the Problems

[0007] A temperature control system according to an aspect of the present disclosure includes a refrigerant circuit in which a refrigerant circulates through a compressor, a high-pressure side heat exchanger, a decompression unit, and a low-pressure side heat exchanger, a heat medium circuit in which a heat medium that exchanges heat with the refrigerant in the high-pressure side heat exchanger and the low-pressure side heat exchanger circulates, and a control unit that controls the refrigerant circuit and the heat medium circuit. The heat medium circuit includes a first temperature control device that heats a temperature control target using the heat medium heated by the refrigerant in the high-pressure side heat exchanger, a flow path merging portion disposed downstream of the first temperature control device in the flow direction of the heat medium and also downstream of the low-pressure side heat exchanger in the flow direction, a flow path branching portion disposed downstream of the first temperature control device in the flow direction of the heat medium and guiding the heat medium to at least one of a first heat medium flow path that guides the heat medium to the high-pressure side heat exchanger and a second heat medium flow path that guides the heat medium to the low-pressure side heat exchanger, a communication flow path that communicates a downstream side of the first temperature control device in the flow direction of the first heat medium flow path and a downstream side of the low-pressure side heat exchanger in the flow direction of the second heat medium flow path, and a pump that is disposed upstream of the flow path branching portion in the flow direction and downstream of the flow path merging portion in the flow direction and pumps the heat medium. The control unit controls to operate the pump to supply the heat medium that has passed through the high-pressure side heat exchanger to the first temperature control device, and to merge the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger at the flow path merging portion disposed downstream of the communication flow path and guide the merged heat medium to the flow path branching portion, thereby executing a heater mode.

[0008] In a method for controlling a temperature control system according to an aspect of the present disclosure, the temperature control system includes a refrigerant circuit in which a refrigerant circulates through a compressor, a high-pressure side heat exchanger, a decompression unit, and a low-pressure side heat exchanger; a heat medium circuit in which a heat medium that exchanges heat with the refrigerant in the high-pressure side heat exchanger and the low-pressure side heat exchanger circulates; and a control unit that controls the refrigerant circuit and the heat medium circuit. The heat medium circuit includes a first temperature control device that heats a temperature control target using the heat medium heated by the refrigerant in the high-pressure side heat exchanger; a flow path merging portion disposed downstream of the first temperature control device in the flow direction of the heat medium and also downstream of the low-pressure side heat exchanger in the flow direction; a flow path branching portion disposed downstream of the first temperature control device in the flow direction of the heat medium, and guiding the heat medium to at least one of a first heat medium flow path that guides the heat medium to the high-pressure side heat exchanger and a second heat medium flow path that guides the heat medium to the low-pressure side heat exchanger; a communication flow path that communicates a downstream side of the first temperature control device in the flow direction of the first heat medium flow path and a downstream side of the low-pressure side heat exchanger in the flow direction of the second heat medium flow path; and a pump disposed upstream of the flow path branching portion in the flow direction and downstream of the flow path merging portion in the flow direction, and pumping the heat medium. A control step is provided for controlling the refrigerant circuit and the heat medium circuit to execute a heater mode in which the pump is operated to supply the heat medium that has passed through the high-pressure side heat exchanger to the first temperature control device, and the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger are merged at the merging portion disposed downstream of the communication flow path and guided to the flow path branching portion.

Effect of the Invention

[0009] According to the present disclosure, it is possible to provide a temperature control system and a method for controlling a temperature control system that can improve the heating start-up performance when executing a heater mode in which a heat medium heated by the power of a compressor at a low outside air temperature is supplied to a temperature control device.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0011] Hereinafter, a temperature control system 100 according to an embodiment of the present disclosure will be described with reference to the drawings. The vehicle temperature control system 100 shown in FIG. 1 is equipped in, for example, an electric vehicle that does not have an engine and obtains driving force for vehicle running from a driving electric motor for running, or a so-called hybrid vehicle that obtains driving force for vehicle running from an engine and an electric motor, in a vehicle (not shown).

[0012] The temperature control system 100 is responsible for air conditioning such as heating, cooling, dehumidifying, and ventilating the passenger compartment where the passengers are seated, as well as heat management of in-vehicle devices such as a battery device (power supply device), a driving motor, and electronic devices that generate heat, and exhaust heat recovery, etc. in the vehicle. The general term "heat management" refers to air conditioning at an appropriate temperature and humidity and managing in-vehicle devices at an appropriate temperature.

[0013] The temperature control system 100, and the electric and electronic devices provided in the vehicle-mounted device are supplied with electric power stored in the vehicle-mounted battery device. The vehicle-mounted battery device is charged from an external power source when the vehicle is stopped.

[0014] The temperature control system 100 includes a refrigerant circuit 10 configured to allow the refrigerant RF to circulate, a heat medium circuit 20 configured to allow a heat medium that exchanges heat with the refrigerant RF to circulate, and a control unit 30 that controls the refrigerant circuit 10 and the heat medium circuit 20. The control unit 30 sets the temperature control system 100 to a predetermined operation mode and controls the operation state of the temperature control system 100 according to the operation mode. The temperature control system 100 includes sensors (not shown) such as a sensor that detects the outside air temperature and a sensor that detects the temperature of the conditioned air blown into the passenger compartment.

[0015] The temperature control system 100 can execute any one of a plurality of operation modes selected by the occupant or the control unit 30. In the present embodiment, as operation modes of the temperature control system 100, a heater mode (FIG. 1), a heat pump mode (FIG. 2), and a cooling mode (FIG. 3) are exemplified.

[0016] <Configuration of the refrigerant circuit 10> The refrigerant circuit 10 includes a compressor 11 that compresses the refrigerant RF, a condenser (high-pressure side heat exchanger) 12, an expansion valve (pressure reducing section) 13, and an evaporator (low-pressure side heat exchanger) 14. In the refrigerant circuit 10, the refrigerant RF circulates according to a refrigeration cycle. As the refrigerant RF enclosed in the refrigerant circuit 10, a single refrigerant or a mixed refrigerant can be used. For example, HFC (Hydro Fluoro Carbon) refrigerants such as R410A and R32, HFO (Hydro Fluoro Olefin) refrigerants such as R1234ze and R1234yf, or hydrocarbon (HC)-based refrigerants such as propane and isobutane can be used. In particular, it is preferable to use R290 as the refrigerant of the present embodiment.

[0017] When using the fluorocarbon-based or hydrocarbon-based refrigerant listed above, a subcritical refrigeration cycle is configured in which the refrigerant pressure on the high-pressure side does not exceed the critical pressure of the refrigerant. When using carbon dioxide (CO2) as the refrigerant, a transcritical refrigeration cycle is configured in which the refrigerant pressure on the high-pressure side exceeds the critical pressure of the refrigerant. Even in that case, since heat is radiated from the refrigerant by the high-pressure side heat exchanger in the same manner as the condenser 12 of the present embodiment, and the refrigerant absorbs heat by the low-pressure side heat exchanger in the same manner as the evaporator 14 of the present embodiment, a refrigerant that constitutes a transcritical refrigeration cycle such as a carbon dioxide refrigerant can also be adopted in the refrigerant circuit 10.

[0018] The compressor 11 is, for example, an electric compressor equipped with an electric motor (not shown). The rotational speed of the compressor 11 is controlled by the control unit 30. As the compressor 11, for example, a scroll compressor or a rotary compressor is used.

[0019] The condenser 12 is a device that exchanges heat between the refrigerant RF discharged from the compressor 11 and the heat medium HM flowing through the heat medium circuit 20.

[0020] The expansion valve 13 reduces the pressure of the refrigerant RF flowing out from the condenser 12. As the expansion valve 13, in addition to an electronic expansion valve whose opening degree can be controlled based on a command from the control unit 30, a thermal expansion valve can be adopted. Note that a capillary tube may be adopted instead of the expansion valve 13. Further, a receiver (gas-liquid separator) (not shown) may be provided between the condenser 12 and the expansion valve 13.

[0021] The evaporator 14 is a device that exchanges heat between the refrigerant RF flowing out from the expansion valve 13 and the heat medium HM flowing through the heat medium circuit 20. The refrigerant RF evaporated by the evaporator 14 is led to the suction side of the compressor 11. An accumulator (gas-liquid separator) (not shown) may be provided between the evaporator 14 and the compressor 11.

[0022] The compressor 11, the condenser 12, the expansion valve 13, the evaporator 14, and the refrigerant piping connecting these elements are installed, for example, outside the passenger compartment.

[0023] <Configuration of the heat medium circuit 20> The heat medium circuit 20 is configured such that a heat medium HM capable of exchanging heat with a refrigerant RF can circulate in a condenser 12 and an evaporator 14. The heat medium HM is used for cooling or heating at least one temperature-controlled object. In this embodiment, the temperature-controlled object is air supplied into a vehicle interior for air conditioning. Alternatively, the temperature-controlled object may be an in-vehicle battery device.

[0024] The heat medium HM enclosed in the heat medium circuit 20 is a liquid such as water or brine that circulates in the heat medium circuit 20 while maintaining a liquid phase state. Examples of brine include a mixture of water and propylene glycol, or a mixture of water and ethylene glycol.

[0025] The heat medium circuit 20 includes a first pump 21, a second pump 22, an outdoor heat exchanger 23, a reserve tank 24, an in-vehicle air-conditioning unit (first temperature control device) 25A, an in-vehicle air-conditioning unit (second temperature control device) 25B, a three-way valve (flow path branching portion) 26, a three-way valve 27, a three-way valve 28, and a three-way valve (flow path merging portion) 29.

[0026] As flow paths for circulating the heat medium HM, the heat medium circuit 20 has a first heat medium flow path L1 that connects the three-way valve 26 and the three-way valve 29 via the condenser 12, a second heat medium flow path L2 that connects the three-way valve 26 and the three-way valve 29 via the evaporator 14, a third heat medium flow path L3 that connects the three-way valve 29 and the three-way valve 26 via the in-vehicle air-conditioning unit 25B, a fourth heat medium flow path L4 that connects the three-way valve 28 and the three-way valve 27 via the outdoor heat exchanger 23, and a communication flow path L5 that communicates the first heat medium flow path L1 and the second heat medium flow path L2.

[0027] The first pump 21 and the second pump 22 are controlled in terms of their startup, stop, and rotational speed by a control unit 30.

[0028] The first pump 21 is a device that is arranged in the first heat medium flow path L1 and pumps the heat medium HM that has passed through the condenser 12 and the in-vehicle air conditioning unit 25A along the flow direction to the three-way valve 29. The second pump 22 is a device that is arranged in the second heat medium flow path L2 and pumps the heat medium HM that has passed through the evaporator 14 along the flow direction.

[0029] The outdoor heat exchanger 23 is arranged in the fourth heat medium flow path L4 that is connected to the first heat medium flow path L1, and is a device that exchanges heat between the outside air outside the vehicle compartment and the heat medium. The outdoor heat exchanger 23 is arranged, for example, near the air inlet of the vehicle. The outside air supplied to the outdoor heat exchanger 23 by the running of the vehicle and the operation of the outdoor heat exchanger fan (not shown) radiates heat or absorbs heat based on the temperature difference between the outside air and the heat medium.

[0030] The fourth heat medium flow path L4 is a flow path that branches the heat medium HM from the second heat medium flow path L2 on the downstream side of the evaporator 14 in the flow direction of the heat medium HM and allows the heat medium HM to flow into the second heat medium flow path L2 through the three-way valve 27 on the upstream side of the evaporator 14 in the flow direction.

[0031] The communication flow path L5 is a flow path that connects the downstream side of the in-vehicle air conditioning unit 25A in the first heat medium flow path L1 in the flow direction and the downstream side of the evaporator 14 in the second heat medium flow path L2 in the flow direction. The communication flow path L5 connects the first position P1 on the downstream side of the in-vehicle air conditioning unit 25A in the first heat medium flow path L1 in the flow direction and the second position P2 on the downstream side of the evaporator 14 in the second heat medium flow path L2 in the flow direction.

[0032] The reserve tank 24 is a device that is arranged in the communication flow path L5 and stores the heat medium HM. When the heat medium HM enclosed in the heat medium circuit 20 expands as the temperature rises, the reserve tank 24 receives the heat medium HM that exceeds the volume of the piping of the heat medium circuit 20 inside the tank.

[0033] Also, when the volume of the heat medium HM decreases as the temperature drops, the heat medium HM is supplied from the reserve tank 24 to the communication flow path L5, so the communication flow path L5 is maintained in a state filled with the heat medium HM. That is, the reserve tank 24 can prevent the internal pressure of the communication flow path L5 from becoming excessive or the inside of the communication flow path L5 from becoming a negative pressure. The inside of the reserve tank 24 is open to the atmosphere. Note that the reserve tank 24 may be sealed and adjusted to a desired constant pressure.

[0034] The in-vehicle air-conditioning unit 25A is a device that heats the air sent into the vehicle interior, which is the temperature control target, using the heat medium HM heated by the refrigerant RF in the condenser 12. The in-vehicle air-conditioning unit 25A heats the air using the heat medium HM by causing heat exchange between the air sent into the vehicle compartment by an in-vehicle air-conditioning fan (not shown) and the heat medium HM. The in-vehicle air-conditioning unit 25A supplies the air temperature-controlled in the vehicle compartment by the in-vehicle air-conditioning fan.

[0035] Regardless of whether the temperature control system 100 operates in the heater mode (FIG. 1), the heat pump mode (FIG. 2), or the cooling mode (FIG. 3), the in-vehicle air-conditioning unit 25A is supplied with the heat medium HM heated by heat exchange with the refrigerant RF in the condenser 12. Note that when the temperature control system 100 operates in the cooling mode, the control unit 30 controls to block the air blown to the in-vehicle air-conditioning unit 25A with a shielding plate (not shown) so as not to heat the air sent into the vehicle compartment by the in-vehicle air-conditioning unit 25A.

[0036] The in-vehicle air-conditioning unit 25B is a device that heats the air sent into the vehicle interior, which is the temperature control target, using the heat medium HM heated by the refrigerant RF in the condenser 12. The in-vehicle air-conditioning unit 25B is arranged upstream of the three-way valve 26 in the flow direction. In the heater mode, the in-vehicle air-conditioning unit 25B heats the air with the heat medium HM that is a confluence of the heat medium HM that has passed through the in-vehicle air-conditioning unit 25A and the heat medium HM led from the communication flow path L5. The in-vehicle air-conditioning unit 25B supplies the air temperature-controlled in the vehicle compartment by the in-vehicle air-conditioning fan.

[0037] When the temperature control system 100 operates in the heater mode (Figure 1) or the heat pump mode (Figure 2), the indoor air conditioning unit 25B is supplied with the heat medium HM heated by heat exchange with the refrigerant RF in the condenser 12. On the other hand, when the temperature control system 100 operates in the cooling mode (Figure 3), the indoor air conditioning unit 25B is supplied with the heat medium HM cooled by heat exchange with the refrigerant RF in the evaporator 14.

[0038] The indoor air conditioning unit 25A is arranged downstream of the indoor air conditioning unit 25B in the air flow direction. This is to heat the heat medium HM cooled for dehumidification in the indoor air conditioning unit 25B to an appropriate temperature by the indoor air conditioning unit 25A when the cooling mode (Figure 3) is executed.

[0039] The three-way valve 26 is arranged downstream of the indoor air conditioning unit 25A and the indoor air conditioning unit 25B in the flow direction of the heat medium HM, and is a device for branching the heat medium HM into at least one of the first heat medium flow path L1 leading to the condenser 12 and the second heat medium flow path L2 leading to the evaporator 14. The opening degree of the three-way valve 26 is controlled by the control unit 30, and the connection direction is switched according to the operation mode.

[0040] The three-way valve 27 is a device for switching between a circulating state in which the heat medium HM flows through the fourth heat medium flow path L4 and a non-circulating state in which the heat medium HM does not flow through the fourth heat medium flow path L4. The three-way valve 27 is controlled by the control unit 30, and the connection direction can be switched or the heat medium HM can be prevented from flowing according to the operation mode.

[0041] The three-way valve 28 is a device for switching between a circulating state in which the heat medium HM flows through the fourth heat medium flow path L4 and a non-circulating state in which the heat medium HM does not flow through the fourth heat medium flow path L4. The three-way valve 28 is controlled by the control unit 30, and the connection direction can be switched or the heat medium HM can be prevented from flowing according to the operation mode.

[0042] The three-way valve 29 is arranged downstream of the indoor air-conditioning unit 25A in the flow direction and upstream of the indoor air-conditioning unit 25B in the flow direction, and guides the heat medium HM flowing through the first heat medium flow path L1 and the heat medium HM flowing through the second heat medium flow path L2 to the indoor air-conditioning unit 25B via the third heat medium flow path L3.

[0043] <Configuration of the control unit 30> The control unit 30 is a device that controls the refrigerant circuit 10 and the heat medium circuit 20. The control unit 30 is composed of, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and a computer-readable storage medium, etc. And a series of processes for realizing various functions are stored in a storage medium, etc. in the form of a program as an example. The CPU reads this program into the RAM, etc., and executes information processing and arithmetic processing, thereby realizing various functions.

[0044] Note that the program may be applied in a form pre-installed in a ROM or other storage medium, a form provided in a state stored in a computer-readable storage medium, a form distributed via wired or wireless communication means, etc. A computer-readable storage medium is a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, etc.

[0045] Next, the control of the temperature control system 100 having the above configuration will be described. <Heater mode: Figure 1> The heater mode (first heater mode) is suitable for heating when heat absorption from the outside air to the heat medium HM cannot be performed because the outside air temperature is low. The heater mode conveys an amount of heat corresponding to the power of the compressor 11 as a heat source to the passenger compartment by the heat medium HM while avoiding heat radiation from the heat medium HM to the outside air. Thereby, the heating capacity can be ensured even in a situation where the outside air temperature is significantly lower than 0°C. In the heat medium circuit 20 shown in FIG. 1, the location where the heat medium HM flows is indicated by a thick dashed line, and the location where the heat medium HM does not flow is indicated by a thin dotted line.

[0046] Under the command of the control unit 30, the refrigerant circuit 10 is activated. As a result, the refrigerant RF is compressed by the compressor 11, and the high-temperature and high-pressure refrigerant RF is supplied to the condenser 12. In the condenser 12, the refrigerant RF dissipates heat by exchanging heat with the heat medium HM, and the refrigerant RF condenses and liquefies. The liquefied high-pressure refrigerant RF is supplied to the evaporator 14 after being depressurized by the expansion valve 13.

[0047] In the evaporator 14, the refrigerant RF obtains the latent heat of evaporation by exchanging heat with the heat medium HM and evaporates to become a low-pressure gaseous refrigerant RF. The refrigerant RF that exits the evaporator 14 is guided to the compressor 11 to repeat the above-described refrigeration cycle.

[0048] The control unit 30 operates only the first pump 21, branches the heat medium HM at the three-way valve 26 into the first heat medium flow path L1 and the second heat medium flow path L2, and the heat medium HM that has passed through the condenser 12 disposed in the first heat medium flow path L1 and the heat medium HM that has passed through the evaporator 14 disposed in the second heat medium flow path L2 are merged at the first position P1 via the communication flow path L5. The heat medium HM merged at the first position P1 is supplied to the in-vehicle air-conditioning unit 25B disposed in the third heat medium flow path L3 via the three-way valve 29.

[0049] The heat medium HM flowing into the condenser 12 takes heat from the refrigerant RF flowing through the condenser 12 to liquefy the refrigerant RF. The heat medium HM flowing into the evaporator 14 gives the latent heat of evaporation to the refrigerant RF flowing through the evaporator 14 to evaporate the refrigerant RF. The heat medium HM heated by the refrigerant RF in the condenser 12 performs heating by giving heat to the air (or outside air) in the vehicle compartment in the in-vehicle air-conditioning unit 25A and the in-vehicle air-conditioning unit 25B. The heat medium HM that has been cooled by giving heat is guided to the three-way valve 26.

[0050] The three-way valve 26 is configured to be able to adjust the first flow rate of the heat medium HM guided to the first heat medium flow path L1 and the second flow rate of the heat medium HM guided to the second heat medium flow path L2. The control unit 30 controls the three-way valve 26 to adjust the first flow rate and the second flow rate, for example, based on the pressure and / or temperature of the refrigerant RF flowing into the evaporator 14. When the control unit 30 increases the pressure of the refrigerant RF flowing into the evaporator 14, the control unit 30 controls the three-way valve 26 so that the second flow rate increases.

[0051] Further, the control unit 30 controls the three-way valve 26 to adjust the first flow rate and the second flow rate, for example, based on the pressure and / or temperature of the refrigerant RF flowing into the condenser 12. When the control unit 30 increases the pressure of the refrigerant RF flowing into the condenser 12, the control unit 30 controls the three-way valve 26 so that the second flow rate increases.

[0052] As described above, the control unit 30 operates only the first pump 21 without operating the second pump 22, and supplies the heat medium HM that has passed through the condenser 12 to the indoor air-conditioning unit 25A. Further, the control unit 30 merges the heat medium HM that has passed through the condenser 12 and is guided from the communication flow path L5 into the heat medium HM that has passed through the indoor air-conditioning unit 25A, and guides it to the three-way valve 26. As described above, the control unit 30 controls the refrigerant circuit 10, the three-way valve 26, the three-way valve 27, the three-way valve 29, and the first pump 21 so as to execute a heater mode in which the temperature control target is heated using the power of the compressor 11.

[0053] <Heat pump mode: Figure 2> In the heat pump mode, heat is drawn from the outside air as a heat source to heat the vehicle interior. Since the operation of the refrigerant circuit 10 is the same as that in the heater mode shown in FIG. 1, the description thereof is omitted.

[0054] The heat medium HM heated by the refrigerant RF in the condenser 12 is guided by the action of the first pump 21 through the first heat medium flow path L1 to the third heat medium flow path L3. Then, the in-vehicle air-conditioning units 25A and 25B warm the air (or outside air) in the vehicle compartment by giving heat to the heat medium HM. The heat medium HM that has given heat and been cooled is guided to the three-way valve 26.

[0055] The control unit 30 forms the first circulation system by guiding the heat medium HM with the three-way valve 26 only from the third heat medium flow path L3 to the first heat medium flow path L1 and guiding the heat medium HM that has passed through the first heat medium flow path L1 with the three-way valve 29 to the in-vehicle air-conditioning unit 25B. Further, the control unit 30 forms the second circulation system by guiding the heat medium HM from the second heat medium flow path L2 to the fourth heat medium flow path L4 with the three-way valves 27 and 28.

[0056] The control unit 30 controls the three-way valve 26, the three-way valve 27, the three-way valve 28, the three-way valve 29, the first pump 21, and the second pump 22 so as to execute the heat pump mode in which the heat medium HM is heated by the outside air in the outdoor heat exchanger 23, the refrigerant RF is heated by the heat medium HM passing through the second heat medium flow path L2, and the heat medium HM passing through the first heat medium flow path L1 is heated by the refrigerant RF by forming the first circulation system and the second circulation system.

[0057] <Cooling mode: Figure 3> In the cooling mode, cold air is supplied to the vehicle compartment using the in-vehicle air-conditioning unit 25B. Since the operation of the refrigerant circuit 10 is the same as that in the heater mode shown in FIG. 1, the description thereof is omitted.

[0058] The heat medium HM heated by the refrigerant RF in the condenser 12 is guided by the action of the first pump 21 through the first heat medium flow path L1 to the outdoor heat exchanger 23 disposed in the fourth heat medium flow path L4 via the three-way valve 28. The outdoor heat exchanger 23 dissipates the heat of the heat medium HM by heat exchange between the heat medium HM and the outside air. The heat medium HM cooled by heat exchange with the outside air flows into the first heat medium flow path L1 via the three-way valve 27 and is guided to the condenser 12 again.

[0059] The heat medium HM cooled by the refrigerant RF in the evaporator 14 is guided by the action of the second pump 22 through the second heat medium flow path L2 and via the three-way valve 29 to the in-vehicle air conditioning unit 25B disposed in the third heat medium flow path L3. The in-vehicle air conditioning unit 25B cools the air by heat exchange between the heat medium HM and the air sent into the vehicle interior. The air cooled by the heat medium HM is blown into the vehicle interior. Thereby, the vehicle interior is cooled to a desired temperature.

[0060] The control unit 30 controls the three-way valves 26, 27, 28, 29, the first pump 21, and the second pump 22 so as to execute a cooling mode in which the first pump 21 is operated to circulate the heat medium HM in the order of the condenser 12, the in-vehicle air conditioning unit 25A, and the outdoor heat exchanger 23, and the second pump 22 is operated to circulate in the order of the evaporator 14 and the in-vehicle air conditioning unit 25B.

[0061] The temperature control system 100 of the present embodiment described above exhibits the following operations and effects. According to the temperature control system 100 of the present embodiment, by executing the heater mode, the heat medium HM that has passed through the condenser 12 can be supplied to the in-vehicle air conditioning unit 25A to heat the air blown into the vehicle interior. In the heater mode, by operating the first pump 21, the heat medium HM that has passed through the evaporator 14 is guided from the second heat medium flow path L2 to the first heat medium flow path L1 via the communication flow path L5. Since this communication flow path L5 communicates the downstream side in the flow direction of the first heat medium flow path L1 from the in-vehicle air conditioning unit 25A and the downstream side in the flow direction of the second heat medium flow path L2 from the evaporator 14, the heat medium HM that has passed through the evaporator 14 is not supplied to the in-vehicle air conditioning unit 25A.

[0062] According to the temperature control system 100 of the present embodiment, when the heater mode is executed, since the heat medium HM that is cooled by heat exchange with the refrigerant RF when passing through the evaporator 14 is not supplied to the indoor air conditioning unit 25A, the heat of the heat medium HM that heats the air in the indoor air conditioning unit 25A is not cooled by other heat media. Therefore, it is possible to improve the heating start-up performance when executing the heater mode of supplying the heat medium HM heated by the power of the compressor 11 to the indoor air conditioning unit 25A at a low outside air temperature.

[0063] According to the temperature control system 100 of the present embodiment, the temperature control target heated by the indoor air conditioning unit 25A can be further heated by the indoor air conditioning unit 25B using the heat medium HM obtained by merging the heat medium HM that has passed through the indoor air conditioning unit 25A and the heat medium HM introduced from the communication flow path L5 with the heat medium HM that has passed through the indoor air conditioning unit 25A as a heat source.

[0064] According to the temperature control system 100 of the present embodiment, since the indoor air conditioning unit 25A is arranged on the downstream side in the air flow direction from the indoor air conditioning unit 25B, when the cooling mode is executed, the heat medium HM cooled for dehumidification by the indoor air conditioning unit 25B can be heated to an appropriate temperature by the indoor air conditioning unit 25A.

[0065] 〔First Modified Example〕 In the above description, the heater mode shown in FIG. 1 is assumed to operate only the first pump 21, but other modes may be used. For example, as shown in FIG. 4, the heater mode may be configured to operate only the second pump 22.

[0066] As shown in FIG. 4, the control unit 30 operates only the second pump 22, branches the heat medium HM with the three-way valve 26 into the first heat medium flow path L1 and the second heat medium flow path L2, and passes the heat medium HM that has passed through the condenser 12 arranged in the first heat medium flow path L1 and the heat medium HM that has passed through the evaporator 14 arranged in the second heat medium flow path L2 are merged at the second position P2 via the communication flow path L5. The heat medium HM merged at the second position P2 is supplied to the indoor air conditioning unit 25B arranged in the third heat medium flow path L3 via the three-way valve 29.

[0067] 〔Second Modification Example〕 In the above description, the heater mode is set to operate only the first pump 21, but other modes may be used. For example, as shown in FIG. 5, the heater mode may be set to operate both the first pump 21 and the second pump 22.

[0068] As shown in FIG. 5, the control unit 30 operates the first pump 21 and the second pump 22, branches the heat medium HM into the first heat medium flow path L1 and the second heat medium flow path L2 by the three-way valve 26, and combines the heat medium HM that has passed through the condenser 12 disposed in the first heat medium flow path L1 and the heat medium HM that has passed through the evaporator 14 disposed in the second heat medium flow path L2 by the three-way valve 29. The heat medium HM that has merged at the three-way valve 29 is supplied to the indoor air-conditioning unit 25B disposed in the third heat medium flow path L3.

[0069] 〔Third Modification Example〕 In the temperature control system 100 described above, in the first heat medium flow path L1, the first pump 21 is disposed on the downstream side in the flow direction of the heat medium HM from the indoor air-conditioning unit 25A, but other modes may be used. For example, as shown in FIG. 6, a temperature control system 100A in which the first pump 21 is disposed on the upstream side in the flow direction of the heat medium HM from the condenser 12 in the first heat medium flow path L1 may be used.

[0070] As shown in FIG. 6, the control unit 30 operates the first pump 21 to branch the heat medium HM into the first heat medium flow path L1 and the communication flow path L5 at the first position P1. The heat medium guided to the communication flow path L5 at the first position P1 is guided to the second heat medium flow path L2 at the second position P2. The communication flow path L5 communicates the first position P1 on the downstream side of the heat medium HM in the flow direction from the indoor air-conditioning unit 25A of the first heat medium flow path L1 and the second position P2 on the upstream side of the heat medium HM in the flow direction from the evaporator 14 of the second heat medium flow path L2. The heat medium HM that has passed through the condenser 12 disposed in the first heat medium flow path L1 and the heat medium HM that has passed through the evaporator 14 disposed in the second heat medium flow path L2 merge at the three-way valve 26. The heat medium HM merged at the three-way valve 26 is supplied to the condenser 12 disposed in the first heat medium flow path L1. The heat medium HM supplied to the condenser 12 is guided to the first position P1 (flow path branching portion).

[0071] The temperature control system and the temperature control method of the temperature control system described in each of the embodiments described above can be understood as follows, for example.

[0072] The temperature control system according to the first aspect of the present disclosure includes a refrigerant circuit (10) in which a refrigerant circulates through a compressor (11), a high-pressure side heat exchanger (12), a decompression unit (13), and a low-pressure side heat exchanger (14), a heat medium circuit (20) in which a heat medium that exchanges heat with the refrigerant in the high-pressure side heat exchanger and the low-pressure side heat exchanger circulates, and a control unit (30) that controls the refrigerant circuit and the heat medium circuit. The heat medium circuit includes a first temperature control device (25A) that heats a temperature control target using the heat medium heated by the refrigerant in the high-pressure side heat exchanger, a flow path merging portion (P1, P2) disposed downstream of the first temperature control device in the flow direction of the heat medium and also downstream of the low-pressure side heat exchanger in the flow direction, a flow path branching portion (26) disposed downstream of the first temperature control device in the flow direction of the heat medium and guiding the heat medium to at least one of a first heat medium flow path (L1) that guides the heat medium to the high-pressure side heat exchanger and a second heat medium flow path (L2) that guides the heat medium to the low-pressure side heat exchanger, a communication flow path (L5) that communicates the downstream side of the first temperature control device in the flow direction of the first heat medium flow path and the downstream side of the low-pressure side heat exchanger in the flow direction of the second heat medium flow path, and pumps (21, 22) that are disposed upstream of the flow path branching portion in the flow direction and downstream of the flow path merging portion in the flow direction and pump the heat medium. The control unit controls to operate the pumps to supply the heat medium that has passed through the high-pressure side heat exchanger to the first temperature control device and to merge the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger at the flow path merging portion disposed downstream of the communication flow path and guide the merged heat medium to the flow path branching portion, thereby executing a heater mode.

[0073] According to the temperature control system according to the first aspect of the present disclosure, by executing the heater mode, the heat medium that has passed through the high-pressure side heat exchanger can be supplied to the first temperature control device to heat the temperature control target. In the heater mode, by operating the pump, the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger merge at a flow path merging portion disposed on the downstream side of the communication flow path. This communication flow path communicates the downstream side in the flow direction of the first temperature control device of the first heat medium flow path and the downstream side in the flow direction of the low-pressure side heat exchanger of the second heat medium flow path, so that the heat medium that has passed through the low-pressure side heat exchanger is not supplied to the first temperature control device.

[0074] According to the temperature control system according to the first aspect of the present disclosure, when the heater mode is executed, since the heat medium cooled by heat exchange with the refrigerant when passing through the low-pressure side heat exchanger is not supplied to the first temperature control device, the heat of the heat medium that heats the temperature control target in the first temperature control device is not cooled by other heat media. Therefore, it is possible to improve the heating start-up performance when executing the heater mode in which the heat medium heated by the power of the compressor is supplied to the temperature control device at a low outside air temperature.

[0075] The temperature control system according to the second aspect of the present disclosure further includes the following configuration in the first aspect. That is, it includes a second temperature control device (25B) that is disposed upstream of the flow path branching portion in the flow direction and heats the temperature control target with the heat medium that merges the heat medium that has passed through the first temperature control device and the heat medium led from the communication flow path.

[0076] According to the temperature control system according to the second aspect of the present disclosure, the temperature control target heated by the first temperature control device can be further heated by the second temperature control device using as a heat source the heat medium that merges the heat medium that has passed through the first temperature control device and the heat medium led from the communication flow path.

[0077] The temperature control system according to the third aspect of the present disclosure further includes the following configuration in the second aspect. That is, the temperature control target is the air supplied to the passenger compartment, the first temperature control device is arranged downstream of the second temperature control device in the air flow direction, arranged in the second heat medium flow path, arranged in the first heat medium flow path, a first pump (21) that pumps the heat medium that has passed through the high-pressure side heat exchanger and the first temperature control device (25A) along the flow direction, a second pump (22) that pumps the heat medium that has passed through the low-pressure side heat exchanger along the flow direction, and an outdoor heat exchanger (23) that is connected to the first heat medium flow path and exchanges heat between the heat medium and the outside air. The control unit controls to execute a cooling mode in which the first pump is operated to circulate the heat medium in the order of the high-pressure side heat exchanger, the first temperature control device, and the outdoor heat exchanger, and the second pump is operated to circulate in the order of the low-pressure side heat exchanger and the second temperature control device.

[0078] According to the temperature control system according to the third aspect of the present disclosure, since the first temperature control device is arranged downstream of the second temperature control device in the air flow direction, when the cooling mode is executed, the heat medium cooled for dehumidification by the second temperature control device can be heated to an appropriate temperature by the first temperature control device.

[0079] The temperature control system according to the fourth aspect of the present disclosure includes a refrigerant circuit in which a refrigerant circulates through a compressor, a high-pressure side heat exchanger, a decompression unit, and a low-pressure side heat exchanger, a heat medium circuit in which a heat medium that exchanges heat with the refrigerant in the high-pressure side heat exchanger and the low-pressure side heat exchanger circulates, and a control unit that controls the refrigerant circuit and the heat medium circuit. The heat medium circuit includes a first temperature control device that heats a temperature control target using the heat medium heated by the refrigerant in the high-pressure side heat exchanger, a flow path merging portion that is disposed downstream of the first temperature control device in the flow direction of the heat medium, merges the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger, and guides the merged heat medium to the high-pressure side heat exchanger, a flow path branching portion that is disposed downstream of the first temperature control device in the flow direction of the heat medium, and guides the heat medium to a first heat medium flow path that guides the heat medium to the first temperature control device and a second heat medium flow path that guides the heat medium to the low-pressure side heat exchanger, a communication flow path that communicates a downstream side of the first heat medium flow path downstream of the first temperature control device in the flow direction with an upstream side of the second heat medium flow path upstream of the low-pressure side heat exchanger in the flow direction, and a pump that is disposed upstream of the flow path branching portion in the flow direction and downstream of the flow path merging portion in the flow direction and pumps the heat medium. The control unit controls the pump to operate to supply the heat medium that has passed through the high-pressure side heat exchanger to the first temperature control device and to merge the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger from the flow path branching portion through the communication flow path at the flow path merging portion and guide the merged heat medium to the flow path branching portion, thereby executing a heater mode.

[0080] According to the temperature control system according to the fourth aspect of the present disclosure, by executing the heater mode, the heat medium that has passed through the high-pressure side heat exchanger can be supplied to the first temperature control device to heat the temperature control target. In the heater mode, by operating the pump, the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger merge at the flow path merging portion and are guided to the high-pressure side heat exchanger. Since the heat medium merged at the flow path merging portion is guided to the high-pressure side heat exchanger, the heat medium that has passed through the low-pressure side heat exchanger is not supplied to the first temperature control device.

[0081] According to the temperature control system according to the fourth aspect of the present disclosure, when the heater mode is executed, since the heat medium cooled by heat exchange with the refrigerant when passing through the low-pressure side heat exchanger is not supplied to the first temperature control device, the heat of the heat medium that heats the temperature control target in the first temperature control device is not cooled by other heat media. Therefore, it is possible to improve the heating start-up performance when executing the heater mode in which the heat medium heated by the power of the compressor at low outside air temperature is supplied to the temperature control device.

[0082] In the control method of the temperature control system according to the fifth aspect of the present disclosure, the temperature control system includes a refrigerant circuit in which a refrigerant circulates through a compressor, a high-pressure side heat exchanger, a decompression unit, and a low-pressure side heat exchanger, a heat medium circuit in which a heat medium that exchanges heat with the refrigerant in the high-pressure side heat exchanger and the low-pressure side heat exchanger circulates, and a control unit that controls the refrigerant circuit and the heat medium circuit. The heat medium circuit includes a first temperature control device that heats a temperature control target using the heat medium heated by the refrigerant in the high-pressure side heat exchanger, a flow path merging portion disposed downstream of the first temperature control device in the flow direction of the heat medium and downstream of the low-pressure side heat exchanger in the flow direction, a flow path branching portion disposed downstream of the first temperature control device in the flow direction of the heat medium and guiding the heat medium to at least one of a first heat medium flow path that guides the heat medium to the high-pressure side heat exchanger and a second heat medium flow path that guides the heat medium to the low-pressure side heat exchanger, a communication flow path that communicates the downstream side of the first temperature control device in the flow direction of the first heat medium flow path and the downstream side of the low-pressure side heat exchanger in the flow direction of the second heat medium flow path, and a pump disposed upstream of the flow path branching portion in the flow direction and downstream of the flow path merging portion in the flow direction and pumping the heat medium. A control step is provided for controlling the refrigerant circuit and the heat medium circuit to execute a heater mode in which the pump is operated to supply the heat medium that has passed through the high-pressure side heat exchanger to the first temperature control device and to merge the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger at the merging portion disposed downstream of the communication flow path and guide the merged heat medium to the flow path branching portion.

[0083] According to the control method of the temperature control system according to the fifth aspect of the present disclosure, by executing the heater mode, the heat medium that has passed through the high-pressure side heat exchanger can be supplied to the first temperature control device to heat the temperature control target. In the heater mode, by operating the pump, the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger merge at the flow path merging portion disposed on the downstream side of the communication flow path. Since this communication flow path connects the downstream side in the flow direction of the first temperature control device of the first heat medium flow path and the downstream side in the flow direction of the low-pressure side heat exchanger of the second heat medium flow path, the heat medium that has passed through the low-pressure side heat exchanger is not supplied to the first temperature control device.

[0084] According to the control method of the temperature control system according to the fifth aspect of the present disclosure, when executing the heater mode, since the heat medium cooled by heat exchange with the refrigerant when passing through the low-pressure side heat exchanger is not supplied to the first temperature control device, the heat of the heat medium that heats the temperature control target in the first temperature control device is not cooled by other heat media. Therefore, it is possible to improve the heating start-up performance when executing the heater mode in which the heat medium heated by the power of the compressor is supplied to the temperature control device at a low outside air temperature.

Description of Signs

[0085] 10 Refrigerant circuit 11 Compressor 12 Condenser (high-pressure side heat exchanger) 13 Expansion valve 14 Evaporator (low-pressure side heat exchanger) 20 Heat medium circuit 21 First pump 22 Second pump 23 Outdoor heat exchanger 24 Reserve tank 25A Indoor air conditioning unit (first temperature control device) 25B Indoor air conditioning unit (second temperature control device) 26 Three-way valve (flow path merging portion) 27, 28 Three-way valve 29 Three-way valve (flow path branching portion) 30 Control unit 100 Temperature control system HM Heat medium L1 First heat medium flow path L2 Second heat medium flow path L3 Third heat medium flow path L4 Fourth heat medium flow path L5 Communication flow path P1 First position P2 Second position RF Refrigerant

Claims

1. a refrigerant circuit in which a refrigerant circulates through a compressor, a high-pressure side heat exchanger, a pressure reducing section, and a low-pressure side heat exchanger; a heat medium circuit through which a heat medium circulates to exchange heat with the refrigerant in the high-pressure side heat exchanger and the low-pressure side heat exchanger; A control unit that controls the refrigerant circuit and the heat medium circuit, The heat medium circuit includes: A first temperature control device that heats a temperature control target using the heat medium heated by the refrigerant in the high-pressure side heat exchanger; a flow path junction arranged downstream of the first temperature control device in a flow direction of the heat medium and downstream of the low-pressure side heat exchanger in the flow direction; a flow path branch portion that is disposed downstream of the first temperature control device in the flow direction and that guides the heat medium to at least one of a first heat medium flow path that guides the heat medium to the high-pressure side heat exchanger and a second heat medium flow path that guides the heat medium to the low-pressure side heat exchanger; a communication flow path that communicates a downstream side of the first heat medium flow path in the flow direction from the first temperature control device with a downstream side of the second heat medium flow path in the flow direction from the low-pressure side heat exchanger; a pump that is disposed upstream of the flow path branching portion in the flow direction and downstream of the flow path joining portion in the flow direction and that pumps the heat medium; having The control unit controls the pump to operate to supply the heat medium that has passed through the high-pressure side heat exchanger to the first temperature control device, and to execute a heater mode in which the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger are merged at the flow path junction located downstream of the communicating flow path and led to the flow path branching section.

2. The temperature control system according to claim 1, further comprising a second temperature control device that is arranged upstream of the flow path branching portion in the flow direction and heats the temperature control target with the heat medium that is a mixture of the heat medium that has passed through the first temperature control device and the heat medium that is guided from the communicating flow path.

3. the temperature control target is air supplied to a vehicle interior, The first temperature control device is disposed downstream of the second temperature control device in a flow direction of the air, a first pump that is disposed in the first heat medium flow path and that pumps the heat medium that has passed through the high-pressure side heat exchanger and the first temperature adjustment device along the flow direction; a second pump disposed in the second heat medium flow path and configured to pump the heat medium that has passed through the low-pressure side heat exchanger along the flow direction; an outdoor heat exchanger connected to the first heat medium flow path and performing heat exchange between the heat medium and outdoor air, The temperature control system of claim 2, wherein the control unit controls the first pump to operate to circulate the heat medium through the high-pressure side heat exchanger, the first temperature control device, and the outdoor heat exchanger in that order, and controls the second pump to operate to execute a cooling mode in which the heat medium is circulated through the low-pressure side heat exchanger and the second temperature control device in that order.

4. a refrigerant circuit in which a refrigerant circulates through a compressor, a high-pressure side heat exchanger, a pressure reducing section, and a low-pressure side heat exchanger; a heat medium circuit through which a heat medium circulates to exchange heat with the refrigerant in the high-pressure side heat exchanger and the low-pressure side heat exchanger; A control unit that controls the refrigerant circuit and the heat medium circuit, The heat medium circuit includes: A first temperature control device that heats a temperature control target using the heat medium heated by the refrigerant in the high-pressure side heat exchanger; a flow path junction that is disposed downstream of the first temperature control device in a flow direction of the heat medium and that joins the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger and leads the heat medium to the high-pressure side heat exchanger; a flow path branch portion that is disposed downstream of the first temperature control device in the flow direction and that guides the heat medium to a first heat medium flow path that guides the heat medium to the first temperature control device and a second heat medium flow path that guides the heat medium to the low-pressure side heat exchanger; a communication flow path that communicates a downstream side of the first heat medium flow path in the flow direction with respect to the first temperature adjustment device and an upstream side of the second heat medium flow path in the flow direction with respect to the low-pressure side heat exchanger; a pump that is disposed upstream of the flow path branching portion in the flow direction and downstream of the flow path joining portion in the flow direction and that pumps the heat medium; having The control unit controls the pump to operate to supply the heat medium that has passed through the high-pressure side heat exchanger to the first temperature control device, and to execute a heater mode in which the heat medium that has passed through the first temperature control device and the heat medium that has passed through the low-pressure side heat exchanger are merged at the flow path junction and led to the flow path branching section.

5. A method for controlling a temperature adjustment system, comprising: The temperature control system includes: a refrigerant circuit in which a refrigerant circulates through a compressor, a high-pressure side heat exchanger, a pressure reducing section, and a low-pressure side heat exchanger; a heat medium circuit through which a heat medium circulates to exchange heat with the refrigerant in the high-pressure side heat exchanger and the low-pressure side heat exchanger; A control unit that controls the refrigerant circuit and the heat medium circuit, The heat medium circuit includes: A first temperature control device that heats a temperature control target using the heat medium heated by the refrigerant in the high-pressure side heat exchanger; a flow path junction arranged downstream of the first temperature control device in a flow direction of the heat medium and downstream of the low-pressure side heat exchanger in the flow direction; a flow path branch portion that is disposed downstream of the first temperature control device in the flow direction and that guides the heat medium to at least one of a first heat medium flow path that guides the heat medium to the high-pressure side heat exchanger and a second heat medium flow path that guides the heat medium to the low-pressure side heat exchanger; a communication flow path that communicates a downstream side of the first heat medium flow path in the flow direction from the first temperature control device with a downstream side of the second heat medium flow path in the flow direction from the low-pressure side heat exchanger; a pump that is disposed upstream of the flow path branching portion in the flow direction and downstream of the flow path joining portion in the flow direction and that pumps the heat medium; A control method for a temperature adjustment system comprising a control step of controlling the refrigerant circuit and the heat medium circuit to execute a heater mode in which the pump is operated to supply the heat medium that has passed through the high-pressure side heat exchanger to the first temperature adjustment device, and the heat medium that has passed through the first temperature adjustment device and the heat medium that has passed through the low-pressure side heat exchanger are merged at the flow path junction located downstream of the communicating flow path and guided to the flow path branching portion.

Images