Temperature control system and method for controlling a temperature control system

Abstract

When executing the heater mode, the first temperature control device and the second temperature control device perform heat exchange with the object to be temperature-controlled in different temperature zones respectively, so as to reduce the heat loss due to heat dissipation in the second temperature control device. 【Solution means】The heat medium circuit 20 has an indoor air-conditioning unit 25A and a battery temperature-control unit 25B. The control unit 30 supplies the first heat medium HM1 or a third heat medium HM3 obtained by mixing the second heat medium HM2 with the first heat medium HM1 to the indoor air-conditioning unit 25A, and supplies the second heat medium HM2 or the third heat medium HM3 to the battery temperature-control unit 25B, thereby providing a temperature-control system 100 that executes a 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 in a low outside air temperature has been 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 executing 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 in 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] Patent Document 1 discloses that, as a device to be heated by cooling water, in addition to a heater core, a heat exchanger for a battery may be provided. However, there is no description on how to arrange the heat exchanger for a battery in a vehicle thermal management system. For example, when arranging the heat exchanger for a battery in the flow path for the heater core where the heater core is arranged, the temperature of the cooling water flowing through the heater core and the heat exchanger for a battery becomes the same.

[0006] Therefore, it is not possible to supply cooling water in different temperature ranges to the heater core and the heat exchanger for a battery respectively, and perform heat exchange with the heat exchange target in different temperature ranges by the heater core and the heat exchanger for a battery. For example, even when the temperature range required by the heat exchanger for a battery is sufficiently lower than the temperature range required by the heater core, since a heat medium at a temperature higher than the required temperature range is supplied to the heat exchanger for a battery, heat dissipation occurs in the heat exchanger for a battery, resulting in heat loss.

[0007] The present disclosure has been made in view of such circumstances, and when executing a heater mode in which a first heat medium heated by the power of a compressor at a low outside air temperature is supplied to a first temperature control device, heat exchange with a temperature control target is performed in different temperature ranges by the first temperature control device and a second temperature control device, respectively, so as to reduce heat loss due to heat dissipation in the second temperature control device. An object is to provide a temperature control system and a control method for the temperature control system.

Means for Solving the Problem

[0008] 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 exchanges heat between the first heat medium heated by the refrigerant in the high-pressure side heat exchanger and a first temperature control target; a second temperature control device that exchanges heat between the second heat medium cooled by the refrigerant in the low-pressure side heat exchanger and a second temperature control target; a first pump disposed in a first heat medium flow path and pumping the first heat medium that has passed through the high-pressure side heat exchanger; and a second pump disposed in a second heat medium flow path and pumping the second heat medium that has passed through the low-pressure side heat exchanger. The control unit controls to execute a heater mode in which the first heat medium that has passed through the high-pressure side heat exchanger or a third heat medium in which the second heat medium is mixed with the first heat medium is supplied to the first temperature control device, and the second heat medium that has passed through the low-pressure side heat exchanger or the third heat medium is supplied to the second temperature control device.

[0009] 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, and 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. The heat medium circuit includes a first temperature control device that exchanges heat between the first heat medium heated by the refrigerant in the high-pressure side heat exchanger and a first temperature control target, a second temperature control device that exchanges heat between the second heat medium cooled by the refrigerant in the low-pressure side heat exchanger and a second temperature control target, a first pump disposed in a first heat medium flow path that pumps the first heat medium that has passed through the high-pressure side heat exchanger, and a second pump disposed in a second heat medium flow path that pumps the second heat medium that has passed through the low-pressure side heat exchanger. The control step controls the refrigerant circuit and the heat medium circuit so as to execute a heater mode in which the first heat medium that has passed through the high-pressure side heat exchanger or the third heat medium in which the second heat medium is mixed with the first heat medium is supplied to the first temperature control device, and the second heat medium that has passed through the low-pressure side heat exchanger or the third heat medium is supplied to the second temperature control device.

Effect of the Invention

[0010] According to the present disclosure, when executing a heater mode in which the first heat medium heated by the power of the compressor at a low outside air temperature is supplied to the first temperature control device, heat exchange with the temperature control target is performed in different temperature ranges by the first temperature control device and the second temperature control device, respectively, so that it is possible to provide a temperature control system and a temperature control system control method capable of reducing heat loss due to heat dissipation in the second temperature control device.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0012] 〔First Embodiment〕 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 a vehicle (not shown), such as an electric vehicle that does not have an engine and obtains driving force for vehicle travel from a driving electric motor for travel, or a so-called hybrid vehicle that obtains driving force for vehicle travel from an engine and an electric motor.

[0013] The temperature control system 100 is responsible for air conditioning such as heating, cooling, dehumidifying, and ventilating the passenger compartment where the passengers are on board, as well as heat management, exhaust heat recovery, etc. of in-vehicle devices such as a battery device mounted on the vehicle, a driving electric motor for travel, and electronic devices that generate heat. What is called "heat management" is to air-condition to an appropriate temperature and humidity and manage the in-vehicle devices at an appropriate temperature.

[0014] Power stored in the in-vehicle battery device is supplied to the temperature control system 100 and the electric devices and electronic devices provided in the in-vehicle devices. The in-vehicle battery device is charged from an external power source when the vehicle is stopped.

[0015] 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, for example, 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.

[0016] 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 an operation mode of the temperature control system 100, a heater mode (FIG. 1) in which a first heat medium HM1 heated by the power of the compressor 11 at a low outside air temperature is supplied to the indoor air conditioning unit 25A is illustrated.

[0017] <Configuration of 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 the 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.

[0018] 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 way as the condenser 12 of the present embodiment, and the action of the refrigerant absorbing heat by the low-pressure side heat exchanger in the same way as the evaporator 14 of the present embodiment is obtained, a refrigerant that constitutes a transcritical refrigeration cycle, such as a carbon dioxide refrigerant, can also be adopted in the refrigerant circuit 10.

[0019] 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.

[0020] The condenser 12 is a device that exchanges heat between the refrigerant RF discharged from the compressor 11 and the first heat medium HM1 flowing through the heat medium circuit 20.

[0021] 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.

[0022] The evaporator 14 is a device that exchanges heat between the refrigerant RF flowing out from the expansion valve 13 and the second heat medium HM2 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.

[0023] 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.

[0024] <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 the refrigerant RF in the condenser 12 and the evaporator 14 can circulate. The heat medium HM is used for cooling or heating at least one temperature-controlled object. In this embodiment, the temperature-controlled object is the air supplied into the vehicle interior for air conditioning. Also, the temperature-controlled object may be an in-vehicle battery device B for storing the electric power used in the vehicle.

[0025] Hereinafter, the heat medium HM heated by the condenser 12 is referred to as the first heat medium HM1, the heat medium HM cooled by the evaporator 14 is referred to as the second heat medium HM2, and the mixture of the first heat medium HM1 and the second heat medium HM2 is referred to as the third heat medium HM3. The first heat medium HM1, the second heat medium HM2, and the third heat medium HM3 are collectively referred to as the heat medium HM.

[0026] The heat medium HM enclosed in the heat medium circuit 20 is a liquid such as water or brine that circulates through the heat medium circuit 20 while maintaining a liquid phase state. Examples of the brine include a mixture of water and propylene glycol, or a mixture of water and ethylene glycol.

[0027] The heat medium circuit 20 includes a first pump 21, a second pump 22, an outdoor heat exchanger (second temperature control device) 23, a reserve tank 24, an in-vehicle air conditioning unit (first temperature control device) 25A, a battery temperature control unit (second temperature control device) 25B, a heat medium supply unit 26, and an on-off valve 27. The heat medium supply unit 26 includes a three-way valve 26a, a three-way valve 26b, a three-way valve 26c, a three-way valve 26d, a three-way valve 26e, and a three-way valve 26f.

[0028] The heat medium circuit 20 includes, as a flow path for circulating the heat medium HM, a first heat medium flow path L1 connecting the condenser 12 and the heat medium supply unit 26, a second heat medium flow path L2 connecting the evaporator 14 and the heat medium supply unit 26, a third heat medium flow path L3 connecting the three-way valve 26a and the three-way valve 26b via the indoor air-conditioning unit 25A, a fourth heat medium flow path L4 connecting the three-way valve 26c and the three-way valve 26d via the battery temperature control unit 25B, a fifth heat medium flow path L5 connecting the three-way valve 26e and the three-way valve 26f via the outdoor heat exchanger 23, and a communication flow path L6 communicating the first heat medium flow path L1 and the second heat medium flow path L2. The communication flow path L6 communicates a first position P1 between the condenser 12 and the first pump 21 in the first heat medium flow path L1 and a second position P2 between the evaporator 14 and the second pump 22 in the second heat medium flow path L2.

[0029] The first pump 21 and the second pump 22 are controlled in terms of their startup, stop, and rotational speed by the control unit 30.

[0030] The first pump 21 is a device disposed in the first heat medium flow path L1 and pumping the first heat medium HM1 that has passed through the condenser 12 toward the heat medium supply unit 26 along the flow direction. The second pump 22 is a device disposed in the second heat medium flow path L2 and pumping the second heat medium HM2 that has passed through the evaporator 14 toward the heat medium supply unit 26 along the flow direction.

[0031] The outdoor heat exchanger 23 is a device disposed in the fifth heat medium flow path L5 and exchanging heat between the outside air (the second temperature control target) outside the vehicle compartment and the heat medium HM. The outdoor heat exchanger 23 is disposed, 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 an outdoor heat exchanger fan (not shown) dissipates or absorbs heat based on the temperature difference between the outside air and the heat medium.

[0032] The reserve tank 24 is a device disposed in the communication flow path L6 and storing the heat medium HM. 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 when the heat medium HM enclosed in the heat medium circuit 20 expands as the temperature rises.

[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 L6, so the communication flow path L6 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 L6 from becoming excessive or the communication flow path L6 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 performs heat exchange between the first heat medium HM1 heated by the refrigerant RF in the condenser 12 and the air (the first temperature control target) sent into the vehicle compartment. The in-vehicle air-conditioning unit 25A causes the air sent into the vehicle compartment by an in-vehicle air-conditioning fan (not shown) to exchange heat with the first heat medium HM1. The in-vehicle air-conditioning unit 25A supplies the air whose temperature has been adjusted in the vehicle compartment by the in-vehicle air-conditioning fan.

[0035] The battery temperature control unit 25B is a device that performs heat exchange between the second heat medium HM2 cooled by the refrigerant RF in the evaporator 14 and the battery device B (the second temperature control target). The battery temperature control unit 25B causes the air sent to the battery device B by a blower fan (not shown) to exchange heat with the second heat medium HM2. Also, the battery temperature control unit 25B may directly bring the pipe through which the second heat medium HM2 flows into contact with the battery device B to cause heat exchange between the battery device B and the second heat medium HM2.

[0036] The heat medium supply unit 26 is connected to the in-vehicle air-conditioning unit 25A, the battery temperature control unit 25B, the outdoor heat exchanger 23, the first heat medium flow path L1, and the second heat medium flow path L2, and supplies the first heat medium HM1 and the second heat medium HM2 to the in-vehicle air-conditioning unit 25A, the battery temperature control unit 25B, and the outdoor heat exchanger 23.

[0037] The heat medium supply unit 26 includes a three-way valve 26a, a three-way valve 26b, a three-way valve 26c, a three-way valve 26d, a three-way valve 26e, and a three-way valve 26f. In the three-way valves 26a to 26f of FIG. 1, white indicates that the valve body is in the open state, and black indicates that the valve body is in the closed state.

[0038] The three-way valve 26a is arranged upstream of the indoor air-conditioning unit 25A in the flow direction of the heat medium HM, and connects the first heat medium flow path L1, the second heat medium flow path L2, and the third heat medium flow path L3. The three-way valve 26b is arranged downstream of the indoor air-conditioning unit 25A in the flow direction of the heat medium HM, and connects the first heat medium flow path L1, the second heat medium flow path L2, and the third heat medium flow path L3.

[0039] The three-way valve 26c is arranged upstream of the battery temperature control unit 25B in the flow direction of the heat medium HM, and connects the first heat medium flow path L1, the second heat medium flow path L2, and the fourth heat medium flow path L4. The three-way valve 26d is arranged downstream of the battery temperature control unit 25B in the flow direction of the heat medium HM, and connects the first heat medium flow path L1, the second heat medium flow path L2, and the fourth heat medium flow path L4.

[0040] The three-way valve 26e is arranged upstream of the outdoor heat exchanger 23 in the flow direction of the heat medium HM, and connects the first heat medium flow path L1, the second heat medium flow path L2, and the fifth heat medium flow path L5. The three-way valve 26f is arranged downstream of the outdoor heat exchanger 23 in the flow direction of the heat medium HM, and connects the first heat medium flow path L1, the second heat medium flow path L2, and the fifth heat medium flow path L5.

[0041] <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, as an example, a series of processes for realizing various functions are stored in a storage medium, etc. in the form of a program. The CPU reads this program into the RAM, etc. and executes information processing and arithmetic processing, thereby realizing various functions.

[0042] Note that the program may be applied in a form where it is pre-installed in a ROM or other storage medium, a form where it is provided in a state stored in a computer-readable storage medium, a form where it is 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.

[0043] The control unit 30 includes a temperature setting unit 31 that sets a target temperature of the battery device B, and a capacity setting unit 32 that sets the required heating capacity of the indoor air conditioning unit 25A and the battery temperature control unit 25B. When the target temperature set by the temperature setting unit 31 is equal to or higher than a predetermined temperature, the control unit 30 controls the refrigerant circuit 10 and the heat medium circuit 20 to execute a heater mode described later. Also, when the required heating capacity set by the capacity setting unit 32 is less than a predetermined value, the control unit 30 controls the refrigerant circuit 10 and the heat medium circuit 20 to execute a heater mode described later.

[0044] Next, the control of the temperature control system 100 with the above configuration will be described. <Heater Mode: Figure 1> The heater mode is suitable for heating when heat cannot be absorbed from the outside air by the heat medium HM because the outside air temperature is low. The heater mode conveys, to the passenger compartment by the heat medium HM, a heat quantity corresponding to the power of the compressor 11 as a heat source while avoiding heat dissipation 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 locations where the heat medium HM flows are indicated by thick dashed-dotted lines, and the locations where the heat medium HM does not flow are indicated by thin dotted lines.

[0045] In response to a command from the control unit 30, the refrigerant circuit 10 is activated. Thereby, 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.

[0046] In the evaporator 14, the refrigerant RF evaporates by obtaining the latent heat of vaporization by exchanging heat with the heat medium HM, and becomes a low-pressure gaseous refrigerant RF. The refrigerant RF that has exited the evaporator 14 is guided to the compressor 11 to repeat the refrigeration cycle described above.

[0047] When executing the heater mode, the control unit 30 operates the first pump 21 to guide the first heat medium HM1 that has passed through the condenser 12 to the heat medium supply unit 26. Further, when executing the heater mode, the control unit 30 operates the second pump 22 to guide the second heat medium HM2 that has passed through the evaporator 14 to the heat medium supply unit 26. The control unit 30 controls the first pump 21 and the second pump 22 so that the rotational speed of the first pump 21 becomes higher than the rotational speed of the second pump 22.

[0048] The heat medium supply unit 26 guides the first heat medium HM1 from the first heat medium flow path L1 to the third heat medium flow path L3 via the three-way valve 26a and supplies it to the indoor air conditioning unit 25A. Further, the heat medium supply unit 26 guides the second heat medium HM2 from the second heat medium flow path L2 to the fourth heat medium flow path L4 via the three-way valve 26c, and guides the first heat medium HM1 from the first heat medium flow path L1 to the fourth heat medium flow path L4 via the three-way valve 26c. The third heat medium HM3 obtained by mixing the second heat medium HM2 with the first heat medium HM1 is supplied to the battery temperature control unit 25B through the fourth heat medium flow path L4.

[0049] The first heat medium HM1 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 indoor air conditioning unit 25A. The second heat medium HM2 cooled by the refrigerant RF in the evaporator 14 is mixed with the first heat medium HM1 to become the third heat medium HM3, and the temperature of the battery device B is adjusted in the battery temperature control unit 25B.

[0050] The three-way valve 26b branches the first heat medium HM1 supplied from the indoor air conditioning unit 25A into the first heat medium flow path L1 and the second heat medium flow path L2. The first heat medium HM1 guided to the first heat medium flow path L1 is supplied to the condenser 12. The first heat medium HM1 guided to the second heat medium flow path L2 is mixed with the third heat medium HM3 supplied from the three-way valve 26d and supplied to the evaporator 14.

[0051] When executing the heater mode shown in FIG. 1, the control unit 30 closes the on-off valve 27 disposed in the communication flow path L6 so that the heat medium HM does not flow through the communication flow path L6. Since the second heat medium HM2 does not flow from the second heat medium flow path L2 into the first heat medium flow path L1 through the communication flow path L6, mixing of the second heat medium HM2 with the first heat medium HM1 is prevented.

[0052] As described above, when the control unit 30 executes the heater mode, it operates the first pump 21 and supplies the first heat medium HM1 that has passed through the condenser 12 to the in-vehicle air conditioning unit 25A to heat the air in the vehicle interior. Further, when the control unit 30 executes the heater mode, it operates the second pump 22 and supplies the second heat medium HM2 that has passed through the evaporator 14 to the battery temperature control unit 25B to adjust the temperature of the battery device B.

[0053] <Modified Example of Heater Mode: Figure 2> In the heater mode shown in FIG. 1, the first heat medium HM1 flowing through the first heat medium flow path L1 and the second heat medium HM2 flowing through the second heat medium flow path L2 are directly joined by the three-way valve 26c of the heat medium supply unit 26. However, the temperature control system 100A of the modified example shown in FIG. 2 may also be used. In the heater mode executed by the temperature control system 100A shown in FIG. 2, the first heat medium HM1 flowing through the first heat medium flow path L1 is guided from the three-way valve 26a to the second heat medium flow path L2 and joined with the second heat medium HM2 in the second heat medium flow path L2.

[0054] As shown in FIG. 2, the first heat medium HM1 flowing through the first heat medium flow path L1 is guided from the three-way valve 26a to the second heat medium flow path L2. On the other hand, the second heat medium HM2 flowing through the second heat medium flow path L2 joins with the first heat medium HM1 near the three-way valve 26c to become the third heat medium HM3 and is then guided to the three-way valve 26c.

[0055] The third heat medium HM3 guided to the three-way valve 26c passes through the battery temperature control unit 25B and is guided to the three-way valve 26d. The three-way valve 26d branches the third heat medium HM3 into the first heat medium flow path L1 and the second heat medium flow path L2. The third heat medium HM3 guided to the first heat medium flow path L1 joins with the first heat medium HM1 and is then guided to the condenser 12. The third heat medium HM3 guided to the second heat medium flow path L2 is guided to the evaporator 14.

[0056] When the control unit 30 executes the heater mode shown in FIG. 2, the on-off valve 27 disposed in the communication flow path L6 is opened so that the heat medium HM flows through the communication flow path L6. The first heat medium HM1 flows from the first heat medium flow path L1 into the second heat medium flow path L2 through the communication flow path L6, and the third heat medium HM3 in which the second heat medium HM2 is mixed with the first heat medium HM1 is guided to the heat medium supply unit 26.

[0057] The temperature control system 100 of the present embodiment described above has the following operations and effects. According to the temperature control system 100 of the present embodiment, by executing the heater mode, the first heat medium HM1 that has passed through the condenser 12 is supplied to the indoor air conditioning unit 25A to heat the air supplied into the vehicle interior. Also, by executing the heater mode, the third heat medium HM3 in which the first heat medium HM1 that has passed through the condenser 12 is mixed with the second heat medium HM2 that has passed through the evaporator 14 is supplied to the battery temperature control unit 25B to perform heat exchange with the air blown to the battery device B or the battery device B. Thereby, when executing the heater mode of supplying the first heat medium HM1 heated by the power of the compressor 11 at a low outside air temperature to the indoor air conditioning unit 25A, heat exchange with the temperature control target is performed in different temperature zones by the indoor air conditioning unit 25A and the battery temperature control unit 25B, respectively, and heat loss due to heat dissipation in the battery temperature control unit 25B can be reduced.

[0058] According to the temperature control system 100 of the present embodiment, by supplying the first heat medium HM1 that is not mixed with the second heat medium HM2 cooled by the evaporator 14 to the indoor air conditioning unit 25A, the air supplied into the vehicle interior can be sufficiently heated. Also, by supplying the third heat medium HM3 in which the second heat medium HM2 cooled by the evaporator 14 is mixed to the battery temperature control unit 25B, heat loss due to heat dissipation in the battery temperature control unit 25B can be reduced as compared with the case of supplying the first heat medium HM1 to the battery temperature control unit 25B.

[0059] According to the temperature control system 100 of the present embodiment, by making the rotation speed of the first pump 21 higher than that of the second pump 22, it is possible to prevent the second heat medium HM2 from flowing into the first heat medium flow path L1 from the second heat medium flow path L2 in the heat medium supply unit 26, and the first heat medium HM1 can be reliably supplied to the indoor air conditioning unit 25A.

[0060] 〔Second Embodiment〕 Next, the temperature control system 100B according to the second embodiment of the present disclosure will be described with reference to the drawings. The temperature control system 100B of the present embodiment is a modified example of the temperature control system 100 of the first embodiment, and is the same as the first embodiment except for the points specifically described below, and the description thereof will be omitted below.

[0061] In the temperature control system 100 according to the first embodiment of the present disclosure, the control unit 30 supplies the first heat medium HM1 to the indoor air conditioning unit 25A, and executes the heater mode so as to supply the third heat medium HM3 obtained by mixing the first heat medium HM1 and the second heat medium HM2 to the battery temperature control unit 25B.

[0062] On the other hand, in the temperature control system 100B according to the second embodiment of the present disclosure, the control unit 30 supplies the third heat medium HM3 obtained by mixing the first heat medium HM1 and the second heat medium HM2 to the indoor air conditioning unit 25A, and executes the heater mode so as to supply the second heat medium HM2 to the battery temperature control unit 25B.

[0063] When the target temperature set by the temperature setting unit 31 is lower than a predetermined temperature, the control unit 30 controls the refrigerant circuit 10 and the heat medium circuit 20 to execute the heater mode described later. Further, when the required heating capacity set by the capacity setting unit 32 is equal to or greater than a predetermined value, the control unit 30 controls the refrigerant circuit 10 and the heat medium circuit 20 to execute the heater mode described later.

[0064] <Heater Mode: Figure 3> The heater mode is suitable for heating when heat absorption from the outside air to the heat medium HM cannot be achieved due to a low outside air temperature. The heater mode conveys, by means of the heat medium HM, a heat quantity corresponding to the power of the compressor 11 as a heat source into the passenger compartment while avoiding heat dissipation 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 far below 0°C. In the heat medium circuit 20 shown in FIG. 3, the locations where the heat medium HM flows are indicated by thick dashed lines, and the locations where the heat medium HM does not flow are indicated by thin dotted lines.

[0065] When executing the heater mode, the control unit 30 operates the first pump 21 to guide the first heat medium HM1 that has passed through the condenser 12 to the heat medium supply unit 26. Also, when executing the heater mode, the control unit 30 operates the second pump 22 to guide the second heat medium HM2 that has passed through the evaporator 14 to the heat medium supply unit 26. The control unit 30 controls the first pump 21 and the second pump 22 such that the rotational speed of the second pump 22 becomes higher than the rotational speed of the first pump 21.

[0066] The heat medium supply unit 26 guides the second heat medium HM2 from the second heat medium flow path L2 to the fourth heat medium flow path L4 via the three-way valve 26c and supplies it to the battery temperature control unit 25B. Also, the heat medium supply unit 26 guides the second heat medium HM2 from the second heat medium flow path L2 to the first heat medium flow path L1 via the three-way valve 26c and mixes it with the first heat medium HM1 flowing through the first heat medium flow path L1. The third heat medium HM3 obtained by mixing the second heat medium HM2 with the first heat medium HM1 is guided to the third heat medium flow path L3 via the three-way valve 26a and supplied to the in-vehicle air conditioning unit 25A.

[0067] The three-way valve 26b supplies the third heat medium HM3 supplied from the in-vehicle air conditioning unit 25A to the first heat medium flow path L1. A part of the third heat medium HM3 guided to the first heat medium flow path L1 is supplied to the condenser 12. Another part of the third heat medium HM3 guided to the first heat medium flow path L1 is mixed with the second heat medium HM2 by the three-way valve 26d and supplied to the evaporator 14 via the second heat medium flow path L2.

[0068] When the control unit 30 executes the heater mode shown in FIG. 3, it closes the on-off valve 27 disposed in the communication flow path L6 so that the heat medium HM does not flow through the communication flow path L6. Since the first heat medium HM1 does not flow from the first heat medium flow path L1 to the second heat medium flow path L2 through the communication flow path L6, mixing of the first heat medium HM1 into the second heat medium HM2 is prevented.

[0069] As described above, when the control unit 30 executes the heater mode, it operates the first pump 21 and supplies the first heat medium HM1 that has passed through the condenser 12 to the in-vehicle air-conditioning unit 25A to heat the air in the vehicle interior. Further, when the control unit 30 executes the heater mode, it operates the second pump 22 and supplies the second heat medium HM2 that has passed through the evaporator 14 to the battery temperature control unit 25B to adjust the temperature of the battery device B.

[0070] <Modified Example of Heater Mode: FIG. 4> In the heater mode shown in FIG. 3, the first heat medium HM1 flowing through the first heat medium flow path L1 and the second heat medium HM2 flowing through the second heat medium flow path L2 directly merge in the first heat medium flow path L1. However, a temperature control system 100C of a modified example shown in FIG. 4 may also be used. In the heater mode executed by the temperature control system 100C shown in FIG. 4, the second heat medium HM2 flowing through the second heat medium flow path L2 is merged with the first heat medium HM1 by the three-way valve 26a.

[0071] As shown in FIG. 4, the second heat medium HM2 flowing through the second heat medium flow path L2 is guided to the three-way valve 26a. On the other hand, the first heat medium HM1 flowing through the first heat medium flow path L1 is guided to the three-way valve 26a. The first heat medium HM1 and the second heat medium HM2 merge at the three-way valve 26a and become the third heat medium HM3, which is then supplied to the in-vehicle air-conditioning unit 25A through the third heat medium flow path L3.

[0072] When the control unit 30 executes the heater mode shown in FIG. 4, the on-off valve 27 disposed in the communication flow path L6 is opened so that the heat medium HM flows through the communication flow path L6. Through the communication flow path L6, the second heat medium HM2 flows from the second heat medium flow path L2 into the first heat medium flow path L1, and the third heat medium HM3 in which the second heat medium HM2 is mixed with the first heat medium HM1 is guided to the heat medium supply unit 26.

[0073] The temperature control system 100B of the present embodiment described above has the following operations and effects. According to the temperature control system 100B of the present embodiment, by executing the heater mode, the third heat medium HM3 in which the second heat medium HM2 that has passed through the evaporator 14 is mixed with the first heat medium HM1 that has passed through the condenser 12 is supplied to the indoor air conditioning unit 25A to heat the air supplied into the vehicle interior.

[0074] Also, by executing the heater mode, the second heat medium HM2 that has passed through the evaporator 14 is supplied to the battery temperature control unit 25B to perform heat exchange with the air blown to the battery device B or the battery device B. Thereby, when executing the heater mode in which the first heat medium HM1 heated by the power of the compressor 11 at a low outside air temperature is supplied to the indoor air conditioning unit 25A, heat exchange with the temperature control target is performed in different temperature ranges by the indoor air conditioning unit 25A and the battery temperature control unit 25B, and heat loss due to heat dissipation in the battery temperature control unit 25B can be reduced.

[0075] According to the temperature control system 100B of the present embodiment, by supplying the third heat medium HM3 in which the second heat medium HM2 cooled by the evaporator 14 is mixed to the indoor air conditioning unit 25A, the air supplied into the vehicle interior can be set to an appropriate temperature that is higher than the second heat medium HM2 and lower than the first heat medium HM1. Further, by supplying the second heat medium HM2 that is not mixed with the first heat medium HM1 heated by the condenser 12 to the battery temperature control unit 25B, heat loss due to heat dissipation in the battery temperature control unit 25B can be reduced as compared with the case where the third heat medium HM3 is supplied to the battery temperature control unit 25B.

[0076] According to the temperature control system 100B of the present embodiment, by setting the rotation speed of the second pump 22 higher than that of the first pump 21, it is possible to prevent the first heat medium HM1 from flowing from the first heat medium flow path L1 to the second heat medium flow path L2 in the heat medium supply unit 26, and to reliably supply the second heat medium HM2 to the battery temperature control unit 25B.

[0077] 〔Third Embodiment〕 Next, the temperature control system 100D according to the third embodiment of the present disclosure will be described with reference to the drawings. The temperature control system 100D of the present embodiment is a modified example of the temperature control system 100B of the second embodiment, and is the same as the second embodiment except for the points specifically described below, and the description thereof will be omitted below.

[0078] In the temperature control system 100B according to the second embodiment of the present disclosure, the control unit 30 executes the heater mode to supply the third heat medium HM3 obtained by mixing the first heat medium HM1 and the second heat medium HM2 to the indoor air conditioning unit 25A, and to supply the second heat medium HM2 to the battery temperature control unit 25B.

[0079] On the other hand, in the temperature control system 100D according to the third embodiment of the present disclosure, the control unit 30 executes the heater mode to supply the third heat medium HM3 obtained by mixing the first heat medium HM1 and the second heat medium HM2 to the indoor air conditioning unit 25A, and to supply the second heat medium HM2 to the outdoor heat exchanger 23. When the temperature control system 100D of the present embodiment executes the heater mode, by supplying the second heat medium HM2 to the outdoor heat exchanger 23, the frost adhering to the outdoor heat exchanger 23 can be heated and removed by the second heat medium HM2.

[0080] <Heater Mode: Figure 5> The heater mode is suitable for heating when heat absorption from the outside air to the heat medium HM cannot be achieved due to a low outside air temperature. The heater mode conveys, by means of the heat medium HM, a heat quantity corresponding to the power of the compressor 11 as a heat source to the passenger compartment while avoiding heat dissipation 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. 5, the locations where the heat medium HM flows are indicated by thick dashed lines, and the locations where the heat medium HM does not flow are indicated by thin dotted lines.

[0081] When executing the heater mode, the control unit 30 operates the first pump 21 to guide the first heat medium HM1 that has passed through the condenser 12 to the heat medium supply unit 26. Further, when executing the heater mode, the control unit 30 operates the second pump 22 to guide the second heat medium HM2 that has passed through the evaporator 14 to the heat medium supply unit 26. The control unit 30 controls the first pump 21 and the second pump 22 such that the rotational speed of the second pump 22 becomes higher than the rotational speed of the first pump 21.

[0082] The heat medium supply unit 26 guides the second heat medium HM2 from the second heat medium flow path L2 to the fifth heat medium flow path L5 via the three-way valve 26e and supplies it to the outdoor heat exchanger 23. Further, the heat medium supply unit 26 guides the second heat medium HM2 from the second heat medium flow path L2 to the first heat medium flow path L1 via the three-way valve 26e and mixes it with the first heat medium HM1 flowing through the first heat medium flow path L1. The third heat medium HM3 obtained by mixing the second heat medium HM2 with the first heat medium HM1 is guided to the third heat medium flow path L3 via the three-way valve 26a and supplied to the in-vehicle air-conditioning unit 25A.

[0083] The three-way valve 26b supplies the third heat medium HM3 supplied from the in-vehicle air-conditioning unit 25A to the first heat medium flow path L1. A part of the third heat medium HM3 guided to the first heat medium flow path L1 is supplied to the condenser 12. Another part of the third heat medium HM3 guided to the first heat medium flow path L1 is mixed with the second heat medium HM2 by the three-way valve 26f and supplied to the evaporator 14 through the second heat medium flow path L2.

[0084] When the control unit 30 executes the heater mode shown in FIG. 5, it opens the on-off valve 27 disposed in the communication flow path L6 so that the heat medium HM flows through the communication flow path L6. The second heat medium HM2 flows from the second heat medium flow path L2 into the first heat medium flow path L1 through the communication flow path L6, and the third heat medium HM3 in which the second heat medium HM2 is mixed with the first heat medium HM1 is guided to the heat medium supply unit 26.

[0085] As described above, when the control unit 30 executes the heater mode, it operates the first pump 21 to supply the first heat medium HM1 that has passed through the condenser 12 to the indoor air conditioning unit 25A to heat the air in the vehicle interior. Further, when the control unit 30 executes the heater mode, it operates the second pump 22 to supply the second heat medium HM2 that has passed through the evaporator 14 to the outdoor heat exchanger 23 to remove the frost adhering to the outdoor heat exchanger 23.

[0086] The temperature control system and the control method of the temperature control system described in each of the above-described embodiments can be understood as follows, for example.

[0087] 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 section (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 section (30) that controls the refrigerant circuit and the heat medium circuit. The heat medium circuit includes a first temperature control device (25A) that exchanges heat between a first heat medium heated by the refrigerant in the high-pressure side heat exchanger and a first temperature control target; a second temperature control device (25B) that exchanges heat between a second heat medium cooled by the refrigerant in the low-pressure side heat exchanger and a second temperature control target; a first pump (21) disposed in a first heat medium flow path (L1) that pumps the first heat medium that has passed through the high-pressure side heat exchanger; and a second pump (22) disposed in a second heat medium flow path (L2) that pumps the second heat medium that has passed through the low-pressure side heat exchanger. The control section controls to execute a heater mode in which the first heat medium that has passed through the high-pressure side heat exchanger or a third heat medium in which the second heat medium is mixed with the first heat medium is supplied to the first temperature control device, and the second heat medium that has passed through the low-pressure side heat exchanger or the third heat medium is supplied to the second temperature control device.

[0088] According to the temperature control system according to the first aspect of the present disclosure, by executing the heater mode, the first heat medium that has passed through the high-pressure side heat exchanger or a third heat medium in which the second heat medium that has passed through the low-pressure side heat exchanger is mixed with the first heat medium is supplied to the first temperature control device to heat the first temperature control target. Also, by executing the heater mode, the second heat medium that has passed through the low-pressure side heat exchanger or a third heat medium in which the first heat medium that has passed through the high-pressure side heat exchanger is mixed with the second heat medium is supplied to the second temperature control device to exchange heat with the second temperature control target. Thereby, when executing the heater mode of supplying the first heat medium heated by the power of the compressor at low outside air temperature to the first temperature control device, heat exchange with the temperature control target is performed in different temperature ranges by the first temperature control device and the second temperature control device, respectively, and heat loss due to heat dissipation in the second temperature control device can be reduced.

[0089] The temperature control system according to the second aspect of the present disclosure further includes the following configuration in the first aspect. That is, the heat medium circuit is connected to the first temperature control device, the second temperature control device, the first heat medium flow path, and the second heat medium flow path, and has a heat medium supply unit (26) that supplies the first heat medium and the second heat medium to the first temperature control device and the second temperature control device. The control unit operates the first pump and the second pump, supplies the first heat medium to the first temperature control device, and executes the heater mode so as to supply the third heat medium to the low-pressure side heat exchanger via the second temperature control device to obtain the second heat medium.

[0090] According to the temperature control system according to the second aspect of the present disclosure, by supplying the first heat medium, in which the second heat medium cooled by the low-pressure side heat exchanger is not mixed, to the first temperature control device, the first temperature control target can be sufficiently heated. Further, by supplying the third heat medium, in which the second heat medium cooled by the low-pressure side heat exchanger is mixed, to the second temperature control device, the heat loss due to heat dissipation in the second temperature control device can be reduced as compared with the case where the first heat medium is supplied to the second temperature control device.

[0091] 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 control unit has a temperature setting unit (31) that sets a target temperature of the second temperature control target, and when the target temperature set by the temperature setting unit is equal to or higher than a predetermined temperature, the control unit supplies the first heat medium to the first temperature control device and executes the heater mode so as to supply the third heat medium to the second temperature control device.

[0092] According to the temperature control system according to the third aspect of the present disclosure, when the target temperature set by the setting unit is equal to or higher than a predetermined temperature, the third heat medium is supplied to the second temperature control device. Therefore, the second temperature control target can be heated to a higher temperature as compared with the case where the second heat medium is supplied to the second temperature control device.

[0093] The temperature control system according to the fourth aspect of the present disclosure further includes the following configuration in the second aspect or the third aspect. That is, the control unit controls the rotation speed of the first pump to be higher than the rotation speed of the second pump.

[0094] According to the temperature control system according to the fourth aspect of the present disclosure, by making the rotation speed of the first pump higher than the rotation speed of the second pump, it is possible to prevent the second heat medium from flowing into the first heat medium flow path from the second heat medium flow path in the heat medium supply unit, and to reliably supply the first heat medium to the first temperature control device.

[0095] The temperature control system according to the fifth aspect of the present disclosure further includes the following configuration in the first aspect. That is, the heat medium circuit is connected to the first temperature control device, the second temperature control device, the first heat medium flow path, and the second heat medium flow path, and has a heat medium supply unit (26) that supplies the first heat medium and the second heat medium to the first temperature control device and the second temperature control device. The control unit operates the first pump and the second pump, and executes the heater mode so as to supply the third heat medium to the high-pressure side heat exchanger via the first temperature control device as the first heat medium and supply the second heat medium to the second temperature control device.

[0096] According to the temperature control system according to the fifth aspect of the present disclosure, by supplying the third heat medium, which is a mixture of the second heat medium cooled by the low-pressure side heat exchanger, to the first temperature control device, the first temperature control target can be set to an appropriate temperature that is higher than the second heat medium and lower than the first heat medium. In addition, by supplying the second heat medium, in which the first heat medium heated by the high-pressure side heat exchanger is not mixed, to the second temperature control device, it is possible to reduce the heat loss due to heat dissipation in the second temperature control device compared to the case where the third heat medium is supplied to the second temperature control device.

[0097] The temperature control system according to the sixth aspect of the present disclosure further includes the following configuration in the fifth aspect. That is, the control unit has a temperature setting unit (31) that sets a target temperature for the second temperature control target, and when the target temperature set by the temperature setting unit is less than a predetermined temperature, the control unit supplies the third heat medium to the first temperature control device and executes the heater mode so as to supply the second heat medium to the second temperature control device.

[0098] According to the temperature control system according to the sixth aspect of the present disclosure, when the target temperature set by the setting unit is less than a predetermined temperature, the second heat medium is supplied to the second temperature control device. Therefore, heat loss due to heat dissipation can be reduced as compared with the case where the third heat medium is supplied to the second temperature control device.

[0099] The temperature control system according to the seventh aspect of the present disclosure further includes the following configuration in the fifth aspect. That is, the control unit has a capacity setting unit (32) that sets the required heating capacity of the first temperature control device and the second temperature control device, and when the required heating capacity set by the capacity setting unit is equal to or greater than a predetermined value, the control unit supplies the third heat medium to the first temperature control device and executes the heater mode so as to supply the second heat medium to the second temperature control device.

[0100] According to the temperature control system according to the seventh aspect of the present disclosure, when the required heating capacity set by the capacity setting unit is equal to or greater than a predetermined value, the temperature of the third heat medium supplied to the first temperature control device is lower than the temperature of the first heat medium. Therefore, the pressure of the refrigerant supplied to the high-pressure side heat exchanger can be increased to increase the temperature of the first heat medium. By increasing the pressure of the refrigerant supplied to the high-pressure side heat exchanger, the power of the compressor increases, and the heating capacity can be increased.

[0101] The temperature control system according to the eighth aspect of the present disclosure further includes the following configuration in any one of the fifth aspect to the seventh aspect. That is, the control unit controls the rotation speed of the second pump to be higher than the rotation speed of the first pump.

[0102] According to the temperature control system according to the eighth aspect of the present disclosure, by making the rotational speed of the second pump higher than the rotational speed of the first pump, it is possible to prevent the first heat medium from flowing from the first heat medium flow path to the second heat medium flow path in the heat medium supply unit, and to reliably supply the second heat medium to the second temperature control device.

[0103] The temperature control system according to the ninth aspect of the present disclosure further includes the following configuration in any one of the first aspect to the third aspect, the fifth aspect to the seventh aspect. That is, the first temperature control target is the air blown into the vehicle interior, and the second temperature control target is the battery that stores the electric power used in the vehicle.

[0104] According to the temperature control system according to the ninth aspect of the present disclosure, the air blown into the vehicle interior can be heated by the first temperature control device, and the battery can be heated by the second temperature control device.

[0105] The temperature control system according to the tenth aspect of the present disclosure further includes the following configuration in any one of the first aspect to the third aspect, the fifth aspect to the seventh aspect. That is, the first temperature control target is the air blown into the vehicle interior, and the second temperature control target is the outside air outside the vehicle.

[0106] According to the temperature control system according to the tenth aspect of the present disclosure, the air blown into the vehicle interior can be heated by the first temperature control device, and the frost adhering to the second temperature control device can be heated and removed by the second heat medium.

[0107] In the control method of the temperature control system according to the 11th 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, and 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. The heat medium circuit includes a first temperature control device that exchanges heat between a first heat medium heated by the refrigerant in the high-pressure side heat exchanger and a first temperature control target, a second temperature control device that exchanges heat between a second heat medium cooled by the refrigerant in the low-pressure side heat exchanger and a second temperature control target, a first pump disposed in a first heat medium flow path that pumps the first heat medium that has passed through the high-pressure side heat exchanger, and a second pump disposed in a second heat medium flow path that pumps the second heat medium that has passed through the low-pressure side heat exchanger. A control step is provided for controlling the refrigerant circuit and the heat medium circuit so as to execute a heater mode in which the first heat medium that has passed through the high-pressure side heat exchanger or a third heat medium in which the second heat medium is mixed with the first heat medium is supplied to the first temperature control device, and the second heat medium that has passed through the low-pressure side heat exchanger or the third heat medium is supplied to the second temperature control device.

[0108] According to the control method of the temperature control system according to the 11th aspect of the present disclosure, by executing the heater mode, the first heat medium that has passed through the high-pressure side heat exchanger or a third heat medium in which the second heat medium that has passed through the low-pressure side heat exchanger is mixed with the first heat medium is supplied to the first temperature control device to heat the first temperature control target. Also, by executing the heater mode, the second heat medium that has passed through the low-pressure side heat exchanger or a third heat medium in which the first heat medium that has passed through the high-pressure side heat exchanger is mixed with the second heat medium is supplied to the second temperature control device to exchange heat with the second temperature control target. Thereby, when executing the heater mode of supplying the first heat medium heated by the power of the compressor at low outside air temperature to the first temperature control device, heat exchange with the temperature control target can be performed in different temperature ranges by the first temperature control device and the second temperature control device, and heat loss due to heat dissipation in the second temperature control device can be reduced.

[0109] The control method of the temperature control system according to the twelfth aspect of the present disclosure further includes the following configuration in the eleventh aspect. That is, the heat medium circuit is connected to the first temperature control device, the second temperature control device, the first heat medium flow path, and the second heat medium flow path, and has a heat medium supply unit that supplies the first heat medium and the second heat medium to the first temperature control device and the second temperature control device. The control step operates the first pump and the second pump, supplies the first heat medium to the first temperature control device, and executes the heater mode so as to supply the third heat medium to the low-pressure side heat exchanger via the second temperature control device to obtain the second heat medium.

[0110] According to the control method of the temperature control system according to the twelfth aspect of the present disclosure, by supplying the first heat medium, in which the second heat medium cooled by the low-pressure side heat exchanger is not mixed, to the first temperature control device, the first temperature control target can be sufficiently heated. Further, by supplying the third heat medium in which the second heat medium cooled by the low-pressure side heat exchanger is mixed to the second temperature control device, the heat loss due to heat dissipation in the second temperature control device can be reduced as compared with the case where the first heat medium is supplied to the second temperature control device.

[0111] The control method of the temperature control system according to the thirteenth aspect of the present disclosure further includes the following configuration in the eleventh aspect. That is, the heat medium circuit is connected to the first temperature control device, the second temperature control device, the first heat medium flow path, and the second heat medium flow path, and has a heat medium supply unit that supplies the first heat medium and the second heat medium to the first temperature control device and the second temperature control device. The control step operates the first pump and the second pump, supplies the third heat medium to the high-pressure side heat exchanger via the first temperature control device to obtain the first heat medium, and executes the heater mode so as to supply the second heat medium to the second temperature control device.

[0112] According to the control method of the temperature control system according to the 13th aspect of the present disclosure, by supplying a third heat medium obtained by mixing a second heat medium cooled by a low-pressure side heat exchanger to a first temperature control device, the first temperature control target can be set to an appropriate temperature that is higher than the second heat medium and lower than the first heat medium. Further, by supplying a second heat medium to which the first heat medium heated by the high-pressure side heat exchanger is not mixed to a second temperature control device, heat loss due to heat dissipation in the second temperature control device can be reduced compared to the case where the third heat medium is supplied to the second temperature control device.

Explanation of Signs

[0113] 10 Refrigerant circuit 11 Compressor 12 Condenser (High-pressure side heat exchanger) 13 Expansion valve (Pressure reducing section) 14 Evaporator (Low-pressure side heat exchanger) 20 Heat medium circuit 21 First pump 22 Second pump 23 Outdoor heat exchanger (Second temperature control device) 24 Reservoir tank 25A Indoor air conditioning unit (First temperature control device) 25B Battery temperature control unit (Second temperature control device) 26 Heat medium supply section 26a, 26b, 26c, 26d, 26e, 26f Three-way valve 30 Control section 31 Temperature setting section 32 Capacity setting section 100, 100A, 100B, 100C, 100D Temperature control system B Battery device HM Heat medium HM1 First heat medium HM2 Second heat medium HM3 Third 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 Fifth heat medium flow path L6 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 performs heat exchange between the first heat medium heated by the refrigerant in the high-pressure side heat exchanger and a first temperature control target; A second temperature control device that performs heat exchange between the second heat medium cooled by the refrigerant in the low-pressure side heat exchanger and a second temperature control target; a first pump disposed in a first heat medium flow path and configured to pump the first heat medium that has passed through the high-pressure side heat exchanger; a second pump disposed in a second heat medium flow path and configured to pump the second heat medium that has passed through the low-pressure side heat exchanger; having The control unit controls the temperature control system to execute a heater mode in which the first heat medium that has passed through the high-pressure side heat exchanger or the third heat medium obtained by mixing the first heat medium with the second heat medium is supplied to the first temperature control device, and the second heat medium or the third heat medium that has passed through the low-pressure side heat exchanger is supplied to the second temperature control device.

2. the heat medium circuit has a heat medium supply unit connected to the first temperature adjustment device, the second temperature adjustment device, the first heat medium flow path, and the second heat medium flow path, and supplies the first heat medium and the second heat medium to the first temperature adjustment device and the second temperature adjustment device; The temperature control system of claim 1, wherein the control unit executes the heater mode by operating the first pump and the second pump to supply the first heat medium to the first temperature control device and supply the third heat medium to the low-pressure side heat exchanger via the second temperature control device to become the second heat medium.

3. The control unit has a temperature setting unit that sets a target temperature of the second temperature control object, The temperature control system according to claim 2, wherein the control unit executes the heater mode to supply the first heat medium to the first temperature control device and the third heat medium to the second temperature control device when the target temperature set by the temperature setting unit is equal to or higher than a predetermined temperature.

4. The temperature adjustment system according to claim 2 or 3, wherein the control unit controls the rotation speed of the first pump to be higher than the rotation speed of the second pump.

5. the heat medium circuit has a heat medium supply unit connected to the first temperature adjustment device, the second temperature adjustment device, the first heat medium flow path, and the second heat medium flow path, and supplies the first heat medium and the second heat medium to the first temperature adjustment device and the second temperature adjustment device; The temperature control system of claim 1, wherein the control unit executes the heater mode to operate the first pump and the second pump, supply the third heat medium to the high-pressure side heat exchanger via the first temperature control device to become the first heat medium, and supply the second heat medium to the second temperature control device.

6. The temperature control system of claim 5, wherein the control unit has a temperature setting unit that sets a target temperature of the second temperature control target, and when the target temperature set by the temperature setting unit is less than a predetermined temperature, executes the heater mode to supply the third heat medium to the first temperature control device and supply the second heat medium to the second temperature control device.

7. The temperature control system of claim 5, wherein the control unit has a capacity setting unit that sets the required heating capacity of the first temperature control device and the second temperature control device, and when the required heating capacity set by the capacity setting unit is equal to or greater than a predetermined value, executes the heater mode to supply the third heat medium to the first temperature control device and supply the second heat medium to the second temperature control device.

8. The temperature adjustment system according to claim 5 , wherein the control unit controls the rotation speed of the second pump to be higher than the rotation speed of the first pump.

9. the first temperature control target is air to be blown into a vehicle cabin, The temperature adjustment system according to any one of claims 1 to 3 and claims 5 to 7, wherein the second temperature adjustment target is a battery device that stores electric power used in a vehicle.

10. the first temperature control target is air to be blown into a vehicle cabin, The temperature adjustment system according to any one of claims 1 to 3 and claims 5 to 7, wherein the second temperature adjustment target is outside air outside a vehicle compartment.

11. 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, The heat medium circuit includes: A first temperature control device that performs heat exchange between the first heat medium heated by the refrigerant in the high-pressure side heat exchanger and a first temperature control target; A second temperature control device that performs heat exchange between the second heat medium cooled by the refrigerant in the low-pressure side heat exchanger and a second temperature control target; a first pump disposed in a first heat medium flow path and configured to pump the first heat medium that has passed through the high-pressure side heat exchanger; a second pump disposed in a second heat medium flow path and configured to pump the second heat medium that has passed through the low-pressure side heat exchanger; having 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 first heat medium that has passed through the high-pressure side heat exchanger or a third heat medium obtained by mixing the first heat medium with the second heat medium is supplied to the first temperature adjustment device, and the second heat medium or the third heat medium that has passed through the low-pressure side heat exchanger is supplied to the second temperature adjustment device.

12. the heat medium circuit has a heat medium supply unit connected to the first temperature adjustment device, the second temperature adjustment device, the first heat medium flow path, and the second heat medium flow path, and supplies the first heat medium and the second heat medium to the first temperature adjustment device and the second temperature adjustment device; 12. The control method for a temperature control system according to claim 11, wherein the control step executes the heater mode by operating the first pump and the second pump to supply the first heat medium to the first temperature control device and supply the third heat medium to the low-pressure side heat exchanger via the second temperature control device to become the second heat medium.

13. the heat medium circuit has a heat medium supply unit connected to the first temperature adjustment device, the second temperature adjustment device, the first heat medium flow path, and the second heat medium flow path, and supplies the first heat medium and the second heat medium to the first temperature adjustment device and the second temperature adjustment device; The control method for a temperature control system according to claim 11, wherein the control process executes the heater mode by operating the first pump and the second pump, supplying the third heat medium to the high-pressure side heat exchanger via the first temperature control device to become the first heat medium, and supplying the second heat medium to the second temperature control device.

Images