WO2022163194A1

WO2022163194A1 - Temperature control system

Info

Publication number: WO2022163194A1
Application number: PCT/JP2021/046556
Authority: WO
Inventors: 智弘丸山; 幸治廣野; 聡清水; 達川俣; 正治恩田; 耕大荒; 達生川口
Original assignee: マレリ株式会社
Priority date: 2021-01-29
Filing date: 2021-12-16
Publication date: 2022-08-04
Also published as: JP7079354B1; JP2022117350A; CN116723950A

Abstract

A temperature control system (1) comprises a refrigeration cycle circuit (20) through which refrigerant circulates and a cooling water circuit (50) through which cooling water circulates. The refrigeration cycle circuit (1) has a compressor (21) that compresses the refrigerant, a first outdoor heat exchanger (23) that conducts heat exchange between the refrigerant and outside air, a radiator (22) that heats a fluid using the heat of the refrigerant compressed in the compressor (21), and a first heat exchanger (26) that conducts heat exchange between the refrigerant and the cooling water in the cooling water circuit (50). The cooling water circuit (50) has a first pump (51) that sucks in and discharges the cooling water, a second outdoor heat exchanger (52) that conducts heat exchange between the cooling water and outside air, and a first heat exchanger (26). When the refrigerant absorbs heat from the outside air in the first outdoor heat exchanger (23), the cooling water absorbs heat from the outside air in the second outdoor heat exchanger (52) and the refrigerant absorbs heat from the cooling water in the first heat exchanger (26).

Description

temperature control system

The present invention relates to a vehicle temperature control system.

JP2013-112001A discloses a vehicle air conditioner provided with a defrosting heat exchanger for defrosting when frost forms on an outdoor heat exchanger.

However, the vehicle air conditioner described in JP2013-112001A circulates the refrigerant to the defrosting heat exchanger and heats the outdoor heat exchanger to defrost when the heat exchanger is frosted. It is. This vehicle air conditioner cannot prevent frost formation on the heat exchanger.

An object of the present invention is to suppress the formation of frost on an outdoor heat exchanger at low temperatures.

According to one aspect of the present invention, a temperature control system for a vehicle includes a refrigeration cycle circuit through which refrigerant circulates and a cooling water circuit through which cooling water circulates, and the refrigeration cycle circuit includes a compressor for compressing the refrigerant. And, a first outdoor heat exchanger that exchanges heat between the refrigerant and the outside air, a radiator that heats the fluid using the heat of the refrigerant compressed by the compressor, and the refrigerant and the cooling water circuit and a first heat exchanger that exchanges heat between the cooling water and the cooling water circuit, and the cooling water circuit exchanges heat between the first pump that sucks and discharges the cooling water and the cooling water and the outside air. and the first heat exchanger, and when the first outdoor heat exchanger absorbs heat from the outside air to the refrigerant, the second outdoor heat exchanger cools from the outside air The heat is absorbed by the water, and the heat is absorbed by the refrigerant from the cooling water in the first heat exchanger.

In the above aspect, when the first outdoor heat exchanger of the refrigeration cycle circuit absorbs heat from the outside air to the refrigerant, the second outdoor heat exchanger of the cooling water circuit absorbs heat from the outside air to the cooling water, and the first heat exchanger Heat is absorbed from the cooling water to the refrigerant. Therefore, since a plurality of heat absorption sources from the outside air can be provided, it is possible to suppress a decrease in the surface temperature of each of the heat exchange surfaces of the first outdoor heat exchanger and the second outdoor heat exchanger. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger when the temperature is low.

FIG. 1 is a configuration diagram of a temperature control system according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating a case where the temperature control system is operated in cooling mode and the air conditioner performs cooling operation. FIG. 3 is a diagram illustrating a case where the temperature control system is operated in the first single heat absorption mode and the air conditioner performs the heating operation. FIG. 4 is a diagram illustrating a case where the temperature control system is operated in the simultaneous heat absorption mode and the air conditioner performs the heating operation. FIG. 5 is a diagram illustrating a case where the temperature control system is operated in the second single heat absorption mode and the air conditioner performs the heating operation. FIG. 6 is a diagram illustrating a case where the temperature control system is operated in the dehumidifying and heating mode and the air conditioner performs the dehumidifying and heating operation. FIG. 7 is a configuration diagram of a temperature control system according to a modification of the first embodiment of the present invention. FIG. 8 is a configuration diagram of a temperature control system according to a second embodiment of the present invention. FIG. 9 is a diagram illustrating a case where the temperature control system is operated in the simultaneous heat absorption mode and the air conditioner performs the heating operation. FIG. 10 is a configuration diagram of a temperature control system according to a modification of the second embodiment of the present invention. FIG. 11 is a diagram illustrating a case where the temperature control system is operated in the simultaneous heat absorption mode and the air conditioner performs the heating operation. FIG. 12 is a configuration diagram of a temperature control system according to another modification of the second embodiment of the present invention. FIG. 13 is a diagram illustrating a case where the temperature control system is operated in the simultaneous heat absorption mode and the air conditioner performs the heating operation. FIG. 14 is a configuration diagram of a temperature control system according to a third embodiment of the invention. FIG. 15 is a diagram illustrating a case where the temperature control system is operated in the simultaneous heat absorption mode and the air conditioner performs the heating operation. FIG. 16 is a diagram illustrating a case where the temperature control system is operated in the third single heat absorption mode and the air conditioner performs the heating operation. FIG. 17 is a diagram illustrating a case where the temperature control system is operated in the storage battery heating mode. FIG. 18 is a diagram illustrating a case where the temperature control system is operated in the first battery cooling mode. FIG. 19 is a diagram illustrating a case where the temperature control system is operated in the second battery cooling mode. FIG. 20 is a configuration diagram of a temperature control system according to the fourth embodiment of the invention. FIG. 21 is a diagram illustrating a case where the temperature control system is operated in the simultaneous heat absorption mode, the air conditioner performs heating operation, and the storage battery is cooled. FIG. 22 is a diagram illustrating a case where the temperature control system is operated in the simultaneous heat absorption mode and the air conditioner performs the heating operation to heat the storage battery. FIG. 23 is a configuration diagram of a temperature control system according to a modification of the fourth embodiment of the invention. FIG. 24 is a configuration diagram of a temperature control system according to the fifth embodiment of the invention. FIG. 25 is a diagram illustrating a case where the temperature control system is operated in the simultaneous heat absorption mode and the air conditioner performs the heating operation.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
A temperature control system 1 according to a first embodiment of the present invention will be described below with reference to FIGS. 1 to 7. FIG.

First, the overall configuration of the temperature control system 1 will be described with reference to FIG. FIG. 1 is a configuration diagram of a temperature control system 1. As shown in FIG.

The temperature control system 1 is a system that is mounted on a vehicle (not shown), air-conditions the interior of the vehicle (not shown), and adjusts the temperature of the storage battery 2 as the first storage battery. The temperature control system 1 includes an air conditioner 10 and a cooling water circuit 50 through which cooling water circulates.

The air conditioner 10 has a HVAC (Heating Ventilation and Air Conditioning) unit 11 through which air used for air conditioning passes, a refrigeration cycle circuit 20 through which a refrigerant circulates, and a controller (not shown). The air conditioner 10 is a heat pump system capable of cooling and heating. The air conditioner 10 is mounted on a vehicle (not shown) and air-conditions the interior of the vehicle (not shown). As refrigerants, for example, HF refrigerants such as HFC-134a and HFO-1234yf, and natural refrigerants such as R744 (CO ₂ ) are used.

The HVAC unit 11 cools or heats the air used for air conditioning. The HVAC unit 11 includes a blower (not shown), an air mix door 13, and a case 14 surrounding these so that air used for air conditioning can pass through. In the HVAC unit 11, an evaporator 25 and a heater core 22 of the refrigeration cycle circuit 20 are arranged. The air blown from the blower exchanges heat with the refrigerant flowing through the evaporator 25 and the refrigerant flowing through the heater core 22 .

A blower is a fan that blows air into the HVAC unit 11 .

The air mix door 13 adjusts the amount of air passing through the heater core 22 arranged inside the HVAC unit 11 . The air mix door 13 is installed on the blower side and the opposite side of the heater core 22, respectively. The position of the air mix door 13 moves according to a command signal from a controller (not shown). The air mix door 13 opens the heater core 22 side during heating operation and closes the heater core 22 side during cooling operation. The amount of heat exchange between the air and the refrigerant in the heater core 22 is adjusted by the opening of the air mix door 13 .

The refrigeration cycle circuit 20 includes an electric compressor 21 as a compressor, a heater core 22 as a radiator, an outdoor heat exchanger 23 as a first outdoor heat exchanger, a gas-liquid separator 24, and an evaporator as an evaporator. 25, a cooling water-refrigerant heat exchanger 26 as a first heat exchanger, a variable throttle mechanism 27 as a first variable throttle mechanism, a variable throttle mechanism 28 as a second variable throttle mechanism, and a third variable throttle. A variable throttle mechanism 29 as a mechanism, a bypass passage 30 as a first refrigerant bypass passage, a flow path switching valve 31 as a first refrigerant flow path switching valve, a bypass passage 32 as a second refrigerant bypass passage, and a second refrigerant bypass passage. A flow switching valve 33 as a second refrigerant flow switching valve, a bypass passage 34 as a third refrigerant bypass passage, a check valve 35 as a first check valve, and a check valve as a second check valve 36 and .

The refrigeration cycle circuit 20 has an electric compressor 21, a heater core 22, an outdoor heat exchanger 23, an evaporator 25 acting as a first heat absorber, a check valve 35, and a gas-liquid separator 24, A main loop through which the refrigerant circulates, a cooling water-refrigerant heat exchanger 26 that bypasses the evaporator 25 in the main loop and acts as a second heat absorber, a first branch passage through which the refrigerant flows, and the main loop A bypass passage 30 that bypasses the outdoor heat exchanger 23 in the main loop, and a flow path switching valve 31 as a first opening and closing valve that opens and closes the bypass passage 30. A second branch passage through which the refrigerant flows, and in the main loop a third branch flow path through which the refrigerant flows, having a bypass passage 32 that bypasses the check valve 35 and the evaporator 25, and a flow path switching valve 33 as a second on-off valve that opens and closes the bypass passage 32; have

The electric compressor 21 is driven by an electric motor (not shown) to compress the refrigerant. The electric compressor 21 is, for example, a vane-type rotary compressor, but may be a scroll-type compressor. The rotation speed of the electric compressor 21 is controlled by a command signal from the controller.

The heater core 22 uses the heat of the refrigerant compressed by the electric compressor 21 to heat the air used for air conditioning as a fluid. Instead of the heater core 22 directly heating the air used for air conditioning, the heat of the refrigerant may be used to heat hot water, and the heated hot water may heat the air used for air conditioning. The heater core 22 is provided inside the case 14 . Refrigerant compressed by the electric compressor 21 flows into the heater core 22 . When the air flowing through the case 14 comes into contact with the heater core 22 , heat exchange is performed between the air and the refrigerant compressed by the electric compressor 21 to warm the air. The amount of air that contacts the heater core 22 is adjusted according to the positions of the air mix doors 13 provided upstream and downstream of the heater core 22 in the air flow direction inside the case 14 .

The outdoor heat exchanger 23 is arranged, for example, in the engine room of the vehicle (the motor room in electric vehicles). The outdoor heat exchanger 23 exchanges heat between the refrigerant and the outside air. Outside air is introduced into the outdoor heat exchanger 23 by running of the vehicle or rotation of an outdoor fan (not shown). The outdoor heat exchanger 23 functions as a condenser when the air conditioner 10 performs a cooling operation, and functions as an evaporator when the air conditioner 10 performs a heating operation or a dehumidifying/heating operation.

The gas-liquid separator 24 separates the refrigerant flowing from the evaporator 25, the cooling water-refrigerant heat exchanger 26, or the outdoor heat exchanger 23 into liquid-phase refrigerant and gas-phase refrigerant. The gas-liquid separator 24 supplies the gas-phase refrigerant to the electric compressor 21 .

The evaporator 25 cools and dehumidifies the air passing through the case 14 with the refrigerant that has passed through the variable throttle mechanism 27 and expanded to lower its temperature. In the evaporator 25, the heat of the air flowing through the case 14 evaporates the liquid-phase refrigerant into a gas-phase refrigerant. The gas-phase refrigerant evaporated in the evaporator 25 is supplied again to the electric compressor 21 via the gas-liquid separator 24 .

The cooling water-refrigerant heat exchanger 26 is provided downstream of the variable throttle mechanism 29 in the bypass passage 34 . Refrigerant flows into the cooling water-refrigerant heat exchanger 26 through the variable throttle mechanism 29 and cooling water flows through the cooling water circuit 50 . That is, the cooling water-refrigerant heat exchanger 26 exchanges heat between the refrigerant, which has passed through the variable throttle mechanism 29 and has been expanded and whose temperature has decreased, and the cooling water flowing through the cooling water circuit 50 .

A variable throttle mechanism 27 is provided between the outdoor heat exchanger 23 and the evaporator 25 . The variable throttle mechanism 27 decompresses and expands the liquid-phase refrigerant flowing from the outdoor heat exchanger 23 to lower the temperature. The variable throttling mechanism 27 allows the refrigerant to pass through when in the open state, blocks passage of the refrigerant when in the closed state, and decompresses and expands the refrigerant when in the throttling state. The degree of aperture in the aperture state is adjusted by the controller.

A variable throttle mechanism 28 is provided between the heater core 22 and the outdoor heat exchanger 23 . The variable throttle mechanism 28 decompresses and expands the liquid-phase refrigerant flowing from the heater core 22 to lower the temperature. The variable throttling mechanism 28 allows the refrigerant to pass through when in the open state, blocks passage of the refrigerant when in the closed state, and decompresses and expands the refrigerant when in the throttling state. The degree of aperture in the aperture state is adjusted by the controller.

A variable throttle mechanism 29 is provided between the outdoor heat exchanger 23 and the coolant-refrigerant heat exchanger 26 . The variable throttle mechanism 29 decompresses and expands the liquid-phase refrigerant flowing from the outdoor heat exchanger 23 to lower the temperature. The variable throttling mechanism 29 allows the refrigerant to pass through when in the open state, blocks passage of the refrigerant when in the closed state, and decompresses and expands the refrigerant when in the throttling state. The degree of aperture in the aperture state is adjusted by the controller.

The bypass passage 30 connects the upstream of the variable throttle mechanism 28 and the downstream of the check valve 35 . Refrigerant that bypasses the variable throttle mechanism 28 , the outdoor heat exchanger 23 , and the check valve 35 flows through the bypass passage 30 .

A flow path switching valve 31 is provided in the bypass passage 30 . The flow path switching valve 31 is switched between an open state in which the refrigerant flows, an open state in which a portion of the refrigerant flows, and a closed state in which the flow of the refrigerant is blocked. The channel switching valve 31 is switched by a command signal from the controller. When the flow path switching valve 31 is closed, the refrigerant flowing from the heater core 22 flows through the variable throttle mechanism 28, the outdoor heat exchanger 23, and the check valve 35, and the refrigerant flows through the bypass passage 30. do not do. When the channel switching valve 31 is switched to the open state, the refrigerant flowing from the heater core 22 is branched and guided to the variable throttle mechanism 28 and the variable throttle mechanism 29, respectively. When the flow path switching valve 31 is switched to the open state and the variable throttle mechanism 28 is switched to the closed state, the refrigerant flowing from the heater core 22 flows through the bypass passage 30 and flows through the outdoor heat exchanger 23 and the check valve 35. Refrigerant will not flow through.

The bypass passage 32 connects the upstream of the check valve 35 and the gas-liquid separator 24 . Refrigerant that bypasses the variable throttle mechanism 27, the evaporator 25, and the check valve 36 as well as the variable throttle mechanism 29 and the coolant-refrigerant heat exchanger 26 flows through the bypass passage 32. FIG.

A flow path switching valve 33 is provided in the bypass passage 32 . The channel switching valve 33 is switched between an open state in which the coolant flows and a closed state in which the coolant is blocked. The channel switching valve 33 is switched by a command signal from the controller. When the flow path switching valve 33 is closed, the refrigerant flowing from the outdoor heat exchanger 23 flows through the check valve 35, the variable throttle mechanism 27, the evaporator 25, and the check valve 36, or through the check valve 36. Refrigerant flows through the valve 35, the variable throttle mechanism 29, and the cooling water-refrigerant heat exchanger 26, or both of them, and does not flow through the bypass passage 32. On the other hand, when the flow path switching valve 33 is switched to the open state, the refrigerant flowing from the outdoor heat exchanger 23 flows through the bypass passage 32, and the variable throttle mechanism 27, the evaporator 25, the check valve 36, and the variable throttle mechanism 29 flow through the bypass passage 32. , and the cooling water-refrigerant heat exchanger 26, the refrigerant stops flowing.

The bypass passage 34 connects the downstream side of the check valve 35 and the upstream side of the gas-liquid separator 24 . Refrigerant bypassing the variable throttle mechanism 27 , the evaporator 25 , and the check valve 36 flows through the bypass passage 34 . A variable throttle mechanism 29 and a coolant-refrigerant heat exchanger 26 are provided in the bypass passage 34 .

The check valve 35 is provided downstream of the outdoor heat exchanger 23 . The check valve 35 allows the flow of the refrigerant flowing from the outdoor heat exchanger 23 and prevents the refrigerant flowing through the bypass passage 30 from flowing back to the outdoor heat exchanger 23 .

The check valve 36 is provided downstream of the evaporator 25 . The check valve 36 allows the refrigerant to flow from the evaporator 25 and prevents the refrigerant flowing through the bypass passage 34 from flowing back to the evaporator 25 .

The cooling water circuit 50 includes an electric pump 51 as a first pump, an outdoor heat exchanger 52 as a second outdoor heat exchanger, a battery heat exchanger 53 as a first battery heat exchanger, and a heater. It has an electric water heater 54, a gas-liquid separator 55, a coolant-refrigerant heat exchanger 26, a bypass passage 56, and a three-way valve 57 as a bypass switching valve.

The electric pump 51 is provided upstream of the coolant-refrigerant heat exchanger 26 . The electric pump 51 is driven by an electric motor (not shown) to suck and discharge the cooling water in the cooling water circuit 50 and circulate it. The rotation speed of the electric pump 51 is controlled by a command signal from the controller.

The outdoor heat exchanger 52 is provided downstream of the cooling water-refrigerant heat exchanger 26. The outdoor heat exchanger 52 is arranged, for example, in the engine room of the vehicle (the motor room in electric vehicles). The outdoor heat exchanger 52 exchanges heat between the cooling water and the outside air. Outside air is introduced into the outdoor heat exchanger 52 by running of the vehicle or rotation of an outdoor fan (not shown).

The storage battery heat exchanger 53 exchanges heat between the storage battery 2 and cooling water. The storage battery heat exchanger 53 heats the storage battery 2 with high-temperature cooling water or cools the storage battery 2 with low-temperature cooling water.

The electric hot water heater 54 is provided downstream of the outdoor heat exchanger 52 and upstream of the storage battery heat exchanger 53 . The electric hot water heater 54 is an electric heater that generates heat when electricity is supplied. The output of the electric water heater 54 is controlled by a command signal from the controller. The electric hot water heater 54 heats the cooling water in the cooling water circuit 50 to raise the temperature. The electric hot water heater 54 heats the cooling water when heating the storage battery 2 .

The gas-liquid separator 55 is provided upstream of the electric pump 51 . The gas-liquid separator 55 separates bubbles generated in the cooling water flowing through the cooling water circuit 50 and allows only liquid cooling water to flow into the electric pump 51 .

The bypass passage 56 connects the upstream of the battery heat exchanger 53 and the downstream of the battery heat exchanger 53 . Cooling water that bypasses the storage battery heat exchanger 53 flows through the bypass passage 56 .

The three-way valve 57 is switched by command signals from the controller. The three-way valve 57 switches between a normal state in which the cooling water flows through the battery heat exchanger 53 and a bypass state in which the cooling water bypasses the battery heat exchanger 53 and flows through the bypass passage 56 . When the three-way valve 57 is switched to the normal state, cooling water does not flow through the bypass passage 56 . On the other hand, when the three-way valve 57 is switched to the bypass state, cooling water does not flow through the storage battery heat exchanger 53 .

Next, each operation mode of the temperature control system 1 will be described with reference to FIGS. 2 to 5. FIG. In FIGS. 2 to 5, thick solid lines indicate portions through which the refrigerant or cooling water flows, and thin solid lines indicate portions in which the refrigerant or cooling water stops flowing.

<cooling mode>
FIG. 2 is a diagram illustrating a case where the temperature control system 1 is operated in the cooling mode and the air conditioner 10 performs the cooling operation. The cooling mode is a mode that operates when the vehicle interior is cooled.

In the HVAC unit 11, the air mix door 13 is adjusted to a position where the air flowing inside the case 14 bypasses the heater core 22.

In the refrigerating cycle circuit 20, the variable throttle mechanism 27 is switched to a throttled state for decompressing and expanding the refrigerant. The variable throttle mechanism 28 is switched to an open state allowing the refrigerant to pass. The variable throttle mechanism 29 is switched to a closed state that blocks passage of the refrigerant. The flow path switching valve 31 is switched to a closed state that cuts off the circulation of the refrigerant in the bypass passage 30 . The flow path switching valve 33 is switched to a closed state that cuts off the circulation of the refrigerant in the bypass passage 32 .

The cooling water circuit 50 is set to an arbitrary operating state depending on the temperature of the storage battery 2. When the temperature of the storage battery 2 has risen to a certain degree that requires cooling, the variable throttling mechanism 29 is switched to a throttling state in which the refrigerant is decompressed and expanded. Heat exchange is performed with the refrigerant inside, and the cooling water is cooled by the refrigerant.

The refrigerant compressed by the electric compressor 21 flows into the outdoor heat exchanger 23 through the heater core 22 and the variable throttle mechanism 28 in a high temperature and high pressure state. At this time, the air mix door 13 is positioned so that the air flowing in the case 14 bypasses the heater core 22 , so heat exchange is not performed between the refrigerant and the air in the heater core 22 .

The refrigerant that has flowed into the outdoor heat exchanger 23 exchanges heat with the air passing through the outdoor heat exchanger 23 and liquefies. The refrigerant liquefied in the outdoor heat exchanger 23 flows into the evaporator 25 via the variable throttle mechanism 27 . At this time, the variable throttle mechanism 27 decompresses and expands the liquid-phase refrigerant that has flowed in from the outdoor heat exchanger 23 .

The refrigerant that has flowed into the evaporator 25 exchanges heat with the air flowing inside the case 14 and is vaporized by the heat of the air flowing inside the case 14 . The air inside the case 14 that has exchanged heat with the refrigerant that has flowed into the evaporator 25 is cooled and dehumidified and passes through the inside of the case 14 . This cools and dehumidifies the vehicle interior.

The refrigerant vaporized by the evaporator 25 is supplied to the electric compressor 21 again via the gas-liquid separator 24 . In the cooling mode, the refrigerant circulates in the refrigeration cycle circuit 20 as described above, thereby cooling and dehumidifying the air flowing through the case 14 .

<First single endothermic mode>
FIG. 3 is a diagram illustrating a case where the temperature control system 1 is operated in the first single heat absorption mode and the air conditioner 10 performs the heating operation. The first single heat absorption mode is a mode that operates when the outside air temperature is relatively high (for example, several degrees Celsius to ten and several degrees Celsius) and the interior of the vehicle is heated.

In the HVAC unit 11, the air mix door 13 is adjusted to a position where the air flowing inside the case 14 passes through the heater core 22.

　In the refrigeration cycle circuit 20, the variable throttle mechanism 27 is switched to a closed state that blocks passage of the refrigerant. The variable throttling mechanism 28 is switched to a throttling state in which the refrigerant is decompressed and expanded. The variable throttle mechanism 29 is switched to a closed state that blocks passage of the refrigerant. The flow path switching valve 31 is switched to a closed state that cuts off the circulation of the refrigerant in the bypass passage 30 . The channel switching valve 33 is switched to an open state in which the refrigerant flows through the bypass passage 32 .

The refrigerant compressed by the electric compressor 21 flows into the heater core 22, exchanges heat with the air passing through the heater core 22, and liquefies. The air heated by passing through the heater core 22 is led from the case 14 into the vehicle interior. Thereby, the vehicle interior is heated.

The refrigerant liquefied in the heater core 22 passes through the variable throttle mechanism 28 to be decompressed and expanded, and flows into the outdoor heat exchanger 23 . The refrigerant that has flowed into the outdoor heat exchanger 23 exchanges heat with the outside air introduced into the outdoor heat exchanger 23 and is vaporized.

The refrigerant vaporized in the outdoor heat exchanger 23 passes through the channel switching valve 33, flows into the gas-liquid separator 24, and is supplied to the electric compressor 21 again. In the first single heat absorption mode, the refrigerant circulates through the refrigeration cycle circuit 20 as described above, thereby heating the air flowing through the case 14 and heating the vehicle interior.

<Simultaneous endothermic mode>
FIG. 4 is a diagram illustrating a case where the temperature control system 1 is operated in the simultaneous heat absorption mode and the air conditioner 10 performs heating operation. The simultaneous heat absorption mode is a mode that operates when the outside air temperature is relatively low (eg, -several degrees centigrade to several degrees centigrade).

　In the refrigeration cycle circuit 20, the variable throttle mechanism 27 is switched to a closed state that blocks passage of the refrigerant. The variable throttling mechanism 28 is switched to a throttling state in which the refrigerant is decompressed and expanded. The variable throttling mechanism 29 is switched to a throttling state in which the refrigerant is decompressed and expanded. The channel switching valve 31 is switched to an open state in which part of the refrigerant flows through the bypass passage 30 . The channel switching valve 33 is switched to an open state in which the refrigerant flows through the bypass passage 32 .

In the cooling water circuit 50, the electric pump 51 operates to circulate the cooling water. The three-way valve 57 is switched to a bypass state in which the cooling water bypasses the storage battery heat exchanger 53 and flows through the bypass passage 56 . When the temperature of the storage battery 2 has risen to a certain degree that requires cooling, the three-way valve 57 is switched to a normal state in which cooling water flows through the storage battery heat exchanger 53 .

The refrigerant liquefied in the heater core 22 is branched and guided to the variable throttle mechanism 28 and the variable throttle mechanism 29 . The refrigerant guided to the variable throttle mechanism 28 is decompressed and expanded by the variable throttle mechanism 28 and flows into the outdoor heat exchanger 23 . The refrigerant that has flowed into the outdoor heat exchanger 23 exchanges heat with the outside air introduced into the outdoor heat exchanger 23 and is vaporized.

On the other hand, the refrigerant introduced to the variable throttle mechanism 29 via the bypass passage 30 is decompressed and expanded by the variable throttle mechanism 29 and flows into the coolant-refrigerant heat exchanger 26 . The refrigerant that has flowed into the cooling water-refrigerant heat exchanger 26 exchanges heat with the cooling water in the cooling water circuit 50 and is vaporized.

At this time, the cooling water is circulating in the cooling water circuit 50 by the electric pump 51 . The cooling water whose temperature has been lowered by exchanging heat with the refrigerant in the cooling water-refrigerant heat exchanger 26 is guided to the outdoor heat exchanger 52 . In the outdoor heat exchanger 52, the temperature of the cooling water rises due to heat exchange with the outside air. The cooling water whose temperature has risen in the outdoor heat exchanger 52 passes through the three-way valve 57, the bypass passage 56, and the gas-liquid separator 55, and is supplied to the electric pump 51 again.

The refrigerant vaporized in the outdoor heat exchanger 23 and the refrigerant vaporized in the cooling water-refrigerant heat exchanger 26 flow into the gas-liquid separator 24 and are supplied to the electric compressor 21 again. In the simultaneous heat absorption mode, the refrigerant circulates through the refrigerating cycle circuit 20 and the cooling water circulates through the cooling water circuit 50 as described above, thereby heating the air flowing through the case 14 and heating the vehicle interior.

As described above, in the simultaneous heat absorption mode, the outdoor heat exchanger 23 of the refrigeration cycle circuit 20 absorbs heat from the outside air to the refrigerant, and the outdoor heat exchanger 52 of the cooling water circuit 50 absorbs heat from the outside air to the cooling water for cooling. In the water-refrigerant heat exchanger 26, heat is absorbed from the cooling water to the refrigerant. Therefore, since a plurality of heat absorption sources from the outside air can be provided, a decrease in the surface temperature of the heat exchange surfaces of the outdoor heat exchanger 23 and the outdoor heat exchanger 52 can be suppressed. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger 23 and the outdoor heat exchanger 52 when the temperature is low.

<Second single endothermic mode>
FIG. 5 is a diagram illustrating a case where the temperature control system 1 is operated in the second single heat absorption mode and the air conditioner 10 performs heating operation. The second single heat absorption mode is a mode that operates when the inside of the vehicle is heated when the outside temperature is even lower (for example, when it is about -tens of degrees Celsius to -several degrees Celsius).

　In the refrigeration cycle circuit 20, the variable throttle mechanism 27 is switched to a closed state that blocks passage of the refrigerant. The variable throttle mechanism 28 is switched to a closed state that blocks passage of refrigerant. The variable throttling mechanism 29 is switched to a throttling state in which the refrigerant is decompressed and expanded. The channel switching valve 31 is switched to an open state in which the refrigerant flows through the bypass passage 30 . The channel switching valve 33 is switched to a closed state that blocks passage of the refrigerant.

The refrigerant liquefied in the heater core 22 passes through the bypass passage 30 and is led to the variable throttle mechanism 29 . The refrigerant flowing into the variable throttle mechanism 29 is decompressed and expanded through the variable throttle mechanism 29 and flows into the cooling water-refrigerant heat exchanger 26 . The refrigerant that has flowed into the cooling water-refrigerant heat exchanger 26 exchanges heat with the cooling water in the cooling water circuit 50 and is vaporized.

The refrigerant vaporized in the cooling water-refrigerant heat exchanger 26 flows into the gas-liquid separator 24 and is supplied to the electric compressor 21 again. In the second single heat absorption mode, the refrigerant circulates in the refrigeration cycle circuit 20 and the cooling water circulates in the cooling water circuit 50 as described above, thereby heating the air flowing through the case 14 and heating the vehicle interior. be.

It should be noted that the first single heat absorption mode, the simultaneous heat absorption mode, and the second single heat absorption mode may be switched based on the determination of frost formation on the outdoor heat exchanger 23, for example. Specifically, when it is determined that frost has formed on the outdoor heat exchanger 23 while operating in the first single heat absorption mode, the mode is switched to the simultaneous heat absorption mode. Further, when it is determined that frost has formed on the outdoor heat exchanger 23 while operating in the simultaneous heat absorption mode, the mode is switched to the second single heat absorption mode. Thus, by switching the heat absorption source according to the outside air temperature, it is possible to prevent the outdoor heat exchanger 23 from being frosted. Alternatively, when it is determined that frost has formed on the outdoor heat exchanger 23 while operating in the first single heat absorption mode, the second single heat absorption mode is performed without going through the simultaneous heat absorption mode. You can switch to mode.

The occurrence of frost on the outdoor heat exchanger 23 is determined by the outside air temperature detected by an outside air temperature sensor (not shown) and the refrigerant at the refrigerant outlet of the outdoor heat exchanger 23 detected by a refrigerant temperature sensor (not shown). It is determined based on the difference from the temperature. That is, when the outside air temperature and the refrigerant temperature are deviated from each other, the outdoor heat exchanger 23 cannot perform sufficient heat exchange between the refrigerant and the outside air, and it is determined that frost formation has occurred.

Further, it may be determined that frost has formed on the outdoor heat exchanger 23 based on the difference between the refrigerant temperature at the refrigerant inlet and the refrigerant temperature at the refrigerant outlet of the outdoor heat exchanger 23 . That is, when the difference between the refrigerant temperature at the refrigerant inlet and the refrigerant temperature at the refrigerant outlet of the outdoor heat exchanger 23 is small, heat exchange between the refrigerant and the outside air cannot be sufficiently performed in the outdoor heat exchanger 23, resulting in frost formation. is determined to have occurred.

In addition, it may be determined that frost has formed on the outdoor heat exchanger 23 based on an image of the outdoor heat exchanger 23 captured by an imaging device (not shown). may be used in combination.

Instead of switching the operation mode when it is determined that frost has formed on the outdoor heat exchanger 23, the first single heat absorption mode, the simultaneous heat absorption mode, and the second single heat absorption mode are selected based on a preset time. mode may be switched. Also in this case, the formation of frost on the outdoor heat exchanger 23 can be suppressed.

<Dehumidification heating mode>
FIG. 6 is a diagram illustrating a case where the temperature control system 1 is operated in the dehumidifying and heating mode and the air conditioner 10 performs the dehumidifying and heating operation. The dehumidification/heating mode is a mode that operates when the vehicle interior is dehumidified and heated.

In the refrigerating cycle circuit 20, the variable throttle mechanism 27 is switched to a throttled state for decompressing and expanding the refrigerant. The variable throttling mechanism 28 is switched to a throttling state in which the refrigerant is decompressed and expanded. The variable throttle mechanism 29 is switched to a closed state that blocks passage of the refrigerant. The channel switching valve 31 is switched to an open state in which the refrigerant in the bypass passage 30 flows. The channel switching valve 33 is switched to an open state in which the refrigerant flows through the bypass passage 32 .

The refrigerant liquefied by the heater core 22 is branched and guided to the variable throttle mechanism 28 and the variable throttle mechanism 27 . The refrigerant guided to the variable throttle mechanism 28 is decompressed and expanded by the variable throttle mechanism 28 and flows into the outdoor heat exchanger 23 . The refrigerant that has flowed into the outdoor heat exchanger 23 exchanges heat with the outside air introduced into the outdoor heat exchanger 23 and is vaporized. The vaporized refrigerant is supplied to the electric compressor 21 again through the gas-liquid separator 24 .

On the other hand, the refrigerant introduced to the variable throttle mechanism 27 via the bypass passage 30 is decompressed and expanded by the variable throttle mechanism 27 and flows into the evaporator 25 .

The refrigerant that has flowed into the evaporator 25 exchanges heat with the air flowing inside the case 14 and is vaporized by the heat of the air flowing inside the case 14 . The air in the case 14 that has exchanged heat with the refrigerant that has flowed into the evaporator 25 is dehumidified and passes through the case 14 . The refrigerant vaporized by the evaporator 25 is supplied to the electric compressor 21 again through the gas-liquid separator 24 .

As described above, in the dehumidification heating mode, the refrigerant circulates in the refrigeration cycle circuit 20 as described above, so that the air flowing through the case 14 is dehumidified by the evaporator 25 and heated (reheated) by the heater core 22. It is possible to dehumidify and heat the vehicle interior.

(Modification of the first embodiment)
A temperature control system 1 according to a modification of the first embodiment of the present invention will be described below with reference to FIG. FIG. 7 is a configuration diagram of the temperature control system 1. As shown in FIG. In this modification, the refrigeration cycle circuit 20 has a gas-liquid separator 224 .

The gas-liquid separator 224 is provided upstream of the electric compressor 21 . The gas-liquid separator 224 separates the refrigerant flowing from the heater core 22 or the outdoor heat exchanger 23 into a liquid phase refrigerant and a gas phase refrigerant. The gas-liquid separator 224 has a tank portion 224a and a pipe connection portion 224b.

The tank part 224a stores the refrigerant inside and separates the gas phase refrigerant and the liquid phase refrigerant by gravity. The tank portion 224a is provided such that its central axis is vertical. In the tank portion 224a, the liquid-phase refrigerant is accumulated in the lower side, and the gas-phase refrigerant is accumulated in the space above the liquid-phase refrigerant.

The pipe connection portion 224b is provided at the upper portion of the tank portion 224a and forms an inlet/outlet for the refrigerant from the tank portion 224a. The pipe connection portion 224b is provided on the upper portion of the tank portion 224a. The pipe connection portion 224b includes a first inlet passage 224c, a second inlet passage 224d, a first outlet passage 224e, a second outlet passage 224f, a bypass passage 32, a flow path switching valve 33, and a check valve 35. and have All the pipes connected to the gas-liquid separator 224 are integrated into the pipe connection portion 224b.

The first inlet passage 224c is a passage through which the refrigerant flows from the evaporator 25 via the check valve 36. The second inlet passage 224 d is a passage through which the refrigerant flows from the outdoor heat exchanger 23 . 224 d of 2nd inlet passages correspond to a 1st connection part. A channel switching valve 33 is provided in the second inlet passage 224d. The first outlet passage 224 e is a passage that guides the gas-phase refrigerant accumulated in the tank portion 224 a to the electric compressor 21 . 224 f of 2nd outlet passages are passages which guide the refrigerant|coolant which flowed in from the outdoor heat exchanger 23 to at least one of the variable throttle mechanism 27 and the variable throttle mechanism 29, when the flow-path switching valve 33 is a closed state. A check valve 35 is provided in the second outlet passage 224f.

In this way, by using the gas-liquid separator 224, it is possible to omit the piping required when the bypass passage 32, the flow path switching valve 33, and the check valve 35 are provided outside, and the gas-liquid separator 224 and other components can be simplified.

According to the above-described first embodiment, the following effects are obtained.

In the simultaneous heat absorption mode, when the outdoor heat exchanger 23 of the refrigerating cycle circuit 20 absorbs heat from the outside air to the refrigerant, the outdoor heat exchanger 52 of the cooling water circuit 50 absorbs heat from the outside air to the cooling water to convert the cooling water-refrigerant heat. Heat is absorbed from the cooling water to the refrigerant in the exchanger 26 . Therefore, since a plurality of heat absorption sources from the outside air can be provided, a decrease in the surface temperature of the heat exchange surfaces of the outdoor heat exchanger 23 and the outdoor heat exchanger 52 can be suppressed. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger 23 and the outdoor heat exchanger 52 when the temperature is low.

(Second embodiment)
A temperature control system 201 according to a second embodiment of the present invention will be described below with reference to FIGS. 8 to 13. FIG. In each embodiment described below, the points different from the first embodiment will be mainly described, and the same reference numerals will be given to the components having the same functions, and the description thereof will be omitted. Further, in each embodiment shown below, detailed description of each operation mode will be omitted as appropriate, but operation in each operation mode and switching of the operation mode are possible in the same manner as in the first embodiment.

First, the overall configuration of the temperature control system 201 will be described with reference to FIG. FIG. 8 is a configuration diagram of the temperature control system 201. As shown in FIG.

The temperature control system 201 is a system that is mounted on the vehicle, and adjusts the temperature of the storage battery 2 while air-conditioning the interior of the vehicle. The temperature control system 201 includes an air conditioner 10 and a cooling water circuit 205 through which cooling water circulates.

The cooling water circuit 205 includes a cooling water circuit 150 as a first cooling water circuit in which cooling water circulates, a cooling water circuit 250 as a second cooling water circuit in which cooling water circulates, and a cooling water circuit as a second heat exchanger. - a cooling water heat exchanger 58;

The cooling water circuit 150 includes an electric pump 51, a storage battery heat exchanger 53, an electric hot water heater 54, a gas-liquid separator 55, a cooling water-refrigerant heat exchanger 26, and a cooling water-cooling water heat exchanger 58. , a bypass passage 56 and a three-way valve 57 .

A cooling water-cooling water heat exchanger 58 is provided downstream of the cooling water-refrigerant heat exchanger 26 . The cooling water-cooling water heat exchanger 58 exchanges heat between the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250 . The cooling water-cooling water heat exchanger 58 does not exchange heat when the cooling water in at least one of the cooling water circuit 150 and the cooling water circuit 250 is not circulating. That is, the cooling water-cooling water heat exchanger 58 switches between thermal connection and separation between the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250 .

The cooling water circuit 250 has an electric pump 251 as a second pump for sucking and discharging cooling water, an outdoor heat exchanger 52, a gas-liquid separator 255, and a cooling water-cooling water heat exchanger 58.

The electric pump 251 is provided upstream of the outdoor heat exchanger 52 . The electric pump 251 is driven by an electric motor (not shown) to suck and discharge the cooling water in the cooling water circuit 250 and circulate it. The rotation speed of the electric pump 251 is controlled by a command signal from the controller. By providing the electric pump 51 and the electric pump 251 respectively, the flow rate of the cooling water circulating through the cooling water circuit 150 and the cooling water circuit 250 can be individually changed.

The gas-liquid separator 255 is provided upstream of the electric pump 251 . The gas-liquid separator 255 separates air bubbles generated in the cooling water flowing through the cooling water circuit 250 and allows only liquid cooling water to flow into the electric pump 251 .

A cooling water-cooling water heat exchanger 58 is provided downstream of the outdoor heat exchanger 52 and upstream of the electric pump 251 and the gas-liquid separator 255 .

Next, the simultaneous heat absorption mode of the temperature control system 201 will be described with reference to FIG. In FIG. 9 , a thick solid line indicates a portion through which the refrigerant or cooling water flows, and a thin solid line indicates a portion where the refrigerant or cooling water stops flowing.

<Simultaneous endothermic mode>
FIG. 9 is a diagram illustrating a case where the temperature control system 201 is operated in the simultaneous heat absorption mode and the air conditioner 10 performs heating operation.

In the cooling water circuit 150, the electric pump 51 operates to circulate the cooling water. The three-way valve 57 is switched to a bypass state in which the cooling water bypasses the storage battery heat exchanger 53 and flows through the bypass passage 56 . When the temperature of the storage battery 2 has risen to a certain degree that requires cooling, the three-way valve 57 is switched to a normal state in which cooling water flows through the storage battery heat exchanger 53 .

In the cooling water circuit 250, an electric pump 251 operates to circulate the cooling water. The cooling water circulating in the cooling water circuit 250 can be set to a different flow rate than the cooling water circulating in the cooling water circuit 150 .

On the other hand, the refrigerant introduced to the variable throttle mechanism 29 via the bypass passage 30 is decompressed and expanded by the variable throttle mechanism 29 and flows into the coolant-refrigerant heat exchanger 26 . The refrigerant that has flowed into the cooling water-refrigerant heat exchanger 26 exchanges heat with the cooling water in the cooling water circuit 150 and is vaporized.

At this time, the cooling water is circulating in the cooling water circuit 150 by the electric pump 51 . The cooling water whose temperature has been lowered by exchanging heat with the refrigerant in the cooling water-refrigerant heat exchanger 26 is guided to the cooling water-cooling water heat exchanger 58 . In the cooling water-cooling water heat exchanger 58, heat exchange between the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250 increases the temperature of the cooling water. The cooling water whose temperature has risen in the cooling water-cooling water heat exchanger 58 passes through the three-way valve 57, the bypass passage 56, and the gas-liquid separator 55 and is supplied to the electric pump 51 again.

Also, in the cooling water circuit 250 , the cooling water is circulated by an electric pump 251 . The coolant-coolant heat exchanger 58 exchanges heat with the coolant circulating in the coolant circuit 150 to reduce the temperature of the coolant, and the coolant is guided to the outdoor heat exchanger 52 . In the outdoor heat exchanger 52, the temperature of the cooling water rises due to heat exchange with the outside air. The cooling water whose temperature has risen in the outdoor heat exchanger 52 is supplied to the cooling water-cooling water heat exchanger 58 again. As a result, heat is absorbed from the outside air to the cooling water in the outdoor heat exchanger 52 of the cooling water circuit 250, heat is absorbed from the cooling water to the cooling water in the cooling water-cooling water heat exchanger 58, and the cooling water-refrigerant heat exchanger At 26 heat can be absorbed from the cooling water to the refrigerant.

The refrigerant vaporized in the outdoor heat exchanger 23 and the refrigerant vaporized in the cooling water-refrigerant heat exchanger 26 flow into the gas-liquid separator 24 and are supplied to the electric compressor 21 again. In the simultaneous heat absorption mode, the refrigerant circulates in the refrigeration cycle circuit 20 and the cooling water circulates in the cooling water circuit 150 and the cooling water circuit 250 as described above, thereby heating the air flowing in the case 14 and increasing the temperature inside the vehicle. is heated.

As described above, in the simultaneous heat absorption mode, the outdoor heat exchanger 23 of the refrigeration cycle circuit 20 absorbs heat from the outside air to the refrigerant, and the outdoor heat exchanger 52 of the cooling water circuit 250 absorbs heat from the outside air to the cooling water, thereby cooling. The water-cooling water heat exchanger 58 absorbs heat from the cooling water to the cooling water, and the cooling water-refrigerant heat exchanger 26 absorbs heat from the cooling water to the refrigerant. Therefore, since a plurality of heat absorption sources from the outside air can be provided, a decrease in the surface temperature of the heat exchange surfaces of the outdoor heat exchanger 23 and the outdoor heat exchanger 52 can be suppressed. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger 23 and the outdoor heat exchanger 52 when the temperature is low.

In the temperature control system 201, when it is determined that frost has formed on the outdoor heat exchanger 52 while operating in the simultaneous heat absorption mode, the cooling water circulating in the cooling water circuit 250 is The flow rate is made larger than the flow rate of the cooling water circulating through the cooling water circuit 150 . As a result, even when the amount of heat absorbed from the outdoor heat exchanger 52 is small, the flow rate of the cooling water circulating through the cooling water circuit 250 is made greater than the flow rate of the cooling water circulating through the cooling water circuit 150. Since the cooling water temperature can be increased without changing the amount of heat exchanged per unit volume of cooling water in the heat exchanger 52, operation can be continued even if frost forms on the outdoor heat exchanger 52. can. Therefore, the amount of heat absorbed by the refrigerating cycle circuit 20 via the cooling water circuit 150 can be secured.

The occurrence of frost on the outdoor heat exchanger 52 is determined by the outside air temperature detected by an outside air temperature sensor (not shown) and the cooling water outlet of the outdoor heat exchanger 52 detected by a cooling water temperature sensor (not shown). is determined based on the difference from the cooling water temperature at . That is, when the outside air temperature and the cooling water temperature deviate from each other, the outdoor heat exchanger 52 cannot sufficiently perform heat exchange between the cooling water and the outside air, and it is determined that frost formation is occurring.

Furthermore, it may be determined that frost has formed on the outdoor heat exchanger 52 based on the difference between the cooling water temperature at the cooling water inlet and the cooling water temperature at the cooling water outlet of the outdoor heat exchanger 52 . That is, when the difference between the cooling water temperature at the cooling water inlet of the outdoor heat exchanger 52 and the cooling water temperature at the cooling water outlet of the outdoor heat exchanger 52 is small, heat exchange between the cooling water and the outside air is sufficiently performed in the outdoor heat exchanger 52. Therefore, it is determined that frost formation has occurred.

In addition, it may be determined that frost has formed on the outdoor heat exchanger 52 based on an image of the outdoor heat exchanger 52 captured by an imaging device (not shown). may be used in combination.

When it is determined that frost has formed on the outdoor heat exchanger 52, instead of switching between the flow rate of cooling water circulating through the cooling water circuit 250 and the flow rate of cooling water circulating through the cooling water circuit 150, The flow rate of the cooling water circulating through the cooling water circuit 250 and the flow rate of the cooling water circulating through the cooling water circuit 150 may be switched based on the set time. In this case as well, the formation of frost on the outdoor heat exchanger 52 can be suppressed.

(Modification of Second Embodiment)
A temperature control system 201 according to a modification of the second embodiment of the present invention will be described below with reference to FIGS. 10 and 11. FIG.

First, the overall configuration of the temperature control system 201 will be described with reference to FIG. FIG. 10 is a configuration diagram of the temperature control system 201. As shown in FIG.

The cooling water circuit 205 includes a cooling water circuit 150 , a cooling water circuit 250 , and a cooling water-cooling water heat exchanger 58 .

The cooling water circuit 150 includes an electric pump 51, a storage battery heat exchanger 53, an electric hot water heater 54, a gas-liquid separator 55, a cooling water-refrigerant heat exchanger 26, and a cooling water-cooling water heat exchanger 58. , a bypass passage (first bypass passage) 56 and a three-way valve (first bypass switching valve) 57 . The cooling water-cooling water heat exchanger 58, the bypass passage 56 and the three-way valve 57 constitute a first thermal coupler.

The electric pump 51 is provided upstream of the cooling water-cooling water heat exchanger 58. The electric pump 51 sucks and discharges the cooling water in the cooling water circuit 50 and circulates it.

A cooling water-cooling water heat exchanger 58 is provided downstream of the electric pump 51 and upstream of the cooling water-refrigerant heat exchanger 26 . The cooling water-cooling water heat exchanger 58 exchanges heat between the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250 . The cooling water-cooling water heat exchanger 58 does not exchange heat when the cooling water in at least one of the cooling water circuit 150 and the cooling water circuit 250 is not circulating. That is, the cooling water-cooling water heat exchanger 58 switches between thermal connection and separation between the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250 .

The cooling water circuit 250 includes an electric pump 251, an outdoor heat exchanger 52, a gas-liquid separator 255, a cooling water-cooling water heat exchanger 58, a drive system heat exchanger 259, a bypass passage 256, and a three-way and a valve 257 .

The outdoor heat exchanger 52 is provided downstream of the electric pump 51 and upstream of the drive system heat exchanger 259 .

The drive system heat exchanger 259 is provided downstream of the outdoor heat exchanger 52 and upstream of the cooling water-cooling water heat exchanger 58 . The drive system heat exchanger 259 exchanges heat with the drive motor 3 as a drive system component. The drive system heat exchanger 259 recovers exhaust heat from the drive motor 3 and cools the drive motor 3 . It should be noted that the drive system components may be any component that generates heat during operation, so instead of the drive motor 3, an inverter (not shown) for driving the drive motor 3, an internal combustion engine (not shown), or the like may be used. good too.

The cooling water-cooling water heat exchanger 58 is provided downstream of the drive system heat exchanger 259 and upstream of the electric pump 251 and gas-liquid separator 255 .

A bypass passage 256 connects the upstream side of the cooling water-cooling water heat exchanger 58 and the downstream side of the cooling water-cooling water heat exchanger 58 . Cooling water that bypasses the cooling water-cooling water heat exchanger 58 flows through the bypass passage 256 .

The three-way valve 257 is switched by command signals from the controller. The three-way valve 257 selects between a normal state in which the cooling water flows through the cooling water-cooling water heat exchanger 58 and a bypass state in which the cooling water bypasses the cooling water-cooling water heat exchanger 58 and flows through the bypass passage 256. switch. When the three-way valve 257 is switched to the normal state, cooling water does not flow through the bypass passage 256 . On the other hand, when the three-way valve 257 is switched to the bypass state, cooling water does not flow through the cooling water-cooling water heat exchanger 58 .

Next, the simultaneous heat absorption mode of the temperature control system 201 will be described with reference to FIG. In FIG. 11 , a thick solid line indicates a portion through which the refrigerant or cooling water flows, and a thin solid line indicates a portion where the refrigerant or cooling water stops flowing.

<Simultaneous endothermic mode>
FIG. 11 is a diagram illustrating a case where the temperature control system 201 is operated in the simultaneous heat absorption mode and the air conditioner 10 performs heating operation.

In the cooling water circuit 250, an electric pump 251 operates to circulate the cooling water. The cooling water circulating in the cooling water circuit 250 can be set to a different flow rate than the cooling water circulating in the cooling water circuit 150 . The three-way valve 257 is switched to the normal state in which cooling water flows through the cooling water-cooling water heat exchanger 58 .

At this time, the cooling water is circulating in the cooling water circuit 150 by the electric pump 51 . In the cooling water-cooling water heat exchanger 58, heat exchange between the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250 increases the temperature of the cooling water. The cooling water whose temperature has increased in the cooling water-cooling water heat exchanger 58 is guided to the cooling water-refrigerant heat exchanger 26 to heat the refrigerant in the refrigeration cycle circuit 20 . The cooling water whose temperature has decreased by exchanging heat with the refrigerant in the cooling water-refrigerant heat exchanger 26 passes through the three-way valve 57, the bypass passage 56, and the gas-liquid separator 55, and is supplied to the electric pump 51 again. be done.

Also, in the cooling water circuit 250 , the cooling water is circulated by an electric pump 251 . The cooling water whose temperature has been lowered by exchanging heat with the cooling water circulating in the cooling water circuit 150 in the cooling water-cooling water heat exchanger 58 passes through the gas-liquid separator 255 and the electric pump 251 to perform outdoor heat exchange. It is guided to vessel 52 . In the outdoor heat exchanger 52, the temperature of the cooling water rises due to heat exchange with the outside air. The cooling water whose temperature has risen in the outdoor heat exchanger 52 recovers exhaust heat of the drive motor 3 in the drive system heat exchanger 259, and the temperature further rises. The cooling water whose temperature has risen in the drive system heat exchanger 259 passes through the three-way valve 257 and is supplied to the cooling water-cooling water heat exchanger 58 again. As a result, heat is absorbed from the outside air to the cooling water in the outdoor heat exchanger 52 of the cooling water circuit 250, heat is absorbed from the cooling water to the cooling water in the cooling water-cooling water heat exchanger 58, and the cooling water-refrigerant heat exchanger At 26 heat can be absorbed from the cooling water to the refrigerant.

In addition, by recovering the exhaust heat of the drive motor 3 in the drive system heat exchanger 259, the amount of heat that needs to be absorbed from the outdoor heat exchanger 52 is reduced. A decrease in surface temperature can be suppressed. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger 52 when the temperature is low.

As described above, in the simultaneous heat absorption mode, the outdoor heat exchanger 23 of the refrigeration cycle circuit 20 absorbs heat from the outside air to the refrigerant, and the outdoor heat exchanger 52 of the cooling water circuit 250 absorbs heat from the outside air to the cooling water. The cooling water is heated by the exhaust heat of the driving motor 3 in the system heat exchanger 259, the cooling water-cooling water heat exchanger 58 absorbs heat from the cooling water to the cooling water, and the cooling water-refrigerant heat exchanger 26 heat is absorbed from the cooling water to the refrigerant. Therefore, since a plurality of heat absorption sources from the outside air can be provided, a decrease in the surface temperature of the heat exchange surfaces of the outdoor heat exchanger 23 and the outdoor heat exchanger 52 can be suppressed. Therefore, it is possible to suppress frost formation on the outdoor heat exchanger 23 and the outdoor heat exchanger 52 when the outside air temperature is low.

(Another modification of the second embodiment)
A temperature control system 201 according to another modification of the second embodiment of the present invention will be described below with reference to FIGS. 12 and 13. FIG.

First, the overall configuration of the temperature control system 201 will be described with reference to FIG. FIG. 14 is a configuration diagram of the temperature control system 201. As shown in FIG.

The temperature control system 201 is a system mounted on the vehicle, and performs air conditioning in the vehicle interior and adjusts the temperature of the storage battery 2 and the storage battery 4 as the second storage battery. The temperature control system 201 includes an air conditioner 10 and a cooling water circuit 205 through which cooling water circulates.

The cooling water circuit 205 includes a cooling water circuit 150 , a cooling water circuit 250 and a water reservoir 258 .

The cooling water circuit 150 includes an electric pump 51, a storage battery heat exchanger 53, a gas-liquid separator 55, a cooling water-refrigerant heat exchanger 26, a water reservoir 258, and a bypass passage (third bypass passage) 56. , a three-way valve (third bypass switching valve) 57 .

The electric pump 51 is provided upstream of the coolant-refrigerant heat exchanger 26 . The electric pump 51 sucks and discharges the cooling water in the cooling water circuit 50 and circulates it.

The water reservoir 258 is provided downstream of the cooling water-refrigerant heat exchanger 26 and upstream of the storage battery heat exchanger 53 when the three-way valve 57 is in a normal state, and is provided downstream of the cooling water-refrigerant heat exchanger 53 when the three-way valve 57 is in a bypass state. 26 and upstream of the gas-liquid separator 55 .

The cooling water circuit 250 includes an electric pump 251, an outdoor heat exchanger 52, a gas-liquid separator 255, a water reservoir 258, an electric water heater 254 as a heater, and a bypass passage (seventh bypass passage) 252. , a three-way valve (seventh bypass switching valve) 253, a storage battery heat exchanger 268 as a second storage battery heat exchanger, a bypass passage (fourth bypass passage) 260, and a three-way valve (fourth bypass switching valve) 261 , have At this time, the water reservoir 258 constitutes the first thermal coupler.

The outdoor heat exchanger 52 is provided downstream of the electric pump 251 when the three-way valve 253 is in the normal state.

The water reservoir 258 is provided downstream of the outdoor heat exchanger 52 when the three-way valve 253 is in the normal state, and is provided downstream of the electric water heater 254 when the three-way valve 253 is in the bypass state.

The bypass passage 252 connects the upstream of the outdoor heat exchanger 52 and the downstream of the outdoor heat exchanger 52 . Cooling water that bypasses the outdoor heat exchanger 52 flows through the bypass passage 252 . An electric water heater 254 is provided in the bypass passage 252 .

The electric hot water heater 254 is provided downstream of the electric pump 251 and upstream of the water reservoir 258 . The electric water heater 254 heats the cooling water while the cooling water is flowing through the bypass passage 252 . The electric hot water heater 254 is an electric heater that generates heat when electricity is supplied. The output of the electric water heater 254 is controlled by a command signal from the controller. The electric water heater 254 heats the cooling water in the cooling water circuit 250 to raise the temperature. The electric water heater 254 heats cooling water when heating the storage battery 4 .

The three-way valve 253 is switched by command signals from the controller. The three-way valve 253 switches between a normal state in which the cooling water flows through the outdoor heat exchanger 52 and a bypass state in which the cooling water bypasses the outdoor heat exchanger 52 and flows through the bypass passage 252 . When the three-way valve 253 is switched to the normal state, cooling water does not flow through the bypass passage 252 . On the other hand, when the three-way valve 253 is switched to the bypass state, cooling water does not flow through the outdoor heat exchanger 52 .

The storage battery heat exchanger 268 exchanges heat between the storage battery 4 and cooling water. The storage battery heat exchanger 268 heats the storage battery 4 with high-temperature cooling water or cools the storage battery 4 with low-temperature cooling water.

The bypass passage 260 connects the upstream of the battery heat exchanger 268 and the downstream of the battery heat exchanger 268 . Cooling water that bypasses the storage battery heat exchanger 268 flows through the bypass passage 260 .

The three-way valve 261 is switched by command signals from the controller. The three-way valve 261 switches between a normal state in which the cooling water flows through the battery heat exchanger 268 and a bypass state in which the cooling water bypasses the battery heat exchanger 268 and flows through the bypass passage 260 . When the three-way valve 261 is switched to the normal state, cooling water does not flow through the bypass passage 260 . On the other hand, when the three-way valve 261 is switched to the bypass state, cooling water does not flow through the storage battery heat exchanger 268 .

The water reservoir 258 mixes the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250 and supplies them again. That is, the cooling water in the cooling water circuit 150 is cooled in the cooling water-refrigerant heat exchanger 26, and the cooling water in the cooling water circuit 150 and the cooling water in the cooling water circuit 250 are mixed in the water reservoir 258, and the water reservoir The cooling water is split from 258 to cooling water circuit 150 and cooling water circuit 250 .

Next, the simultaneous heat absorption mode of the temperature control system 201 will be described with reference to FIG. In FIG. 13 , a thick solid line indicates a portion through which the refrigerant or cooling water flows, and a thin solid line indicates a portion where the refrigerant or cooling water stops flowing.

<Simultaneous endothermic mode>
FIG. 13 is a diagram illustrating a case where the temperature control system 201 is operated in the simultaneous heat absorption mode and the air conditioner 10 performs heating operation.

In the cooling water circuit 150, the electric pump 51 operates to circulate the cooling water. The three-way valve 57 is switched to a normal state in which cooling water flows through the battery heat exchanger 53 .

In the cooling water circuit 250, an electric pump 251 operates to circulate the cooling water. The cooling water circulating in the cooling water circuit 250 can be set to a different flow rate than the cooling water circulating in the cooling water circuit 150 . The three-way valve 253 is switched to a normal state in which cooling water flows through the outdoor heat exchanger 52 . The three-way valve 261 is switched to the normal state in which cooling water flows through the battery heat exchanger 268 .

At this time, the cooling water is circulating in the cooling water circuit 150 by the electric pump 51 . The cooling water whose temperature has been lowered by exchanging heat with the refrigerant in the cooling water-refrigerant heat exchanger 26 is guided to the water reservoir 258 . In the water reservoir 258, it is mixed with the cooling water circulating in the cooling water circuit 250 and divided again. The cooling water diverted into the cooling water circuit 150 passes through the three-way valve 57 and is led to the storage battery heat exchanger 53 . In the storage battery heat exchanger 53, the storage battery 2 is heated by heat exchange with cooling water. The cooling water that has heated the storage battery 2 passes through the gas-liquid separator 55 and is supplied to the electric pump 51 again.

Also, in the cooling water circuit 250 , the cooling water is circulated by an electric pump 251 . Cooling water sucked and discharged by the electric pump 251 is guided to the outdoor heat exchanger 52 . In the outdoor heat exchanger 52, the temperature of the cooling water rises due to heat exchange with the outside air. The cooling water whose temperature has risen in the outdoor heat exchanger 52 is supplied to the water reservoir 258 . In the water reservoir 258, it is mixed with the cooling water circulating in the cooling water circuit 150 and divided again. The cooling water diverted into the cooling water circuit 250 passes through the three-way valve 261 and is led to the storage battery heat exchanger 268 . In the storage battery heat exchanger 268, the storage battery 4 is heated by heat exchange with cooling water. The cooling water that has heated the storage battery 4 passes through the gas-liquid separator 255 and is supplied to the electric pump 251 again.

The water reservoir 258 mixes the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250 and supplies them again. As a result, even when the temperature of the cooling water in the cooling water circuit 150 and the temperature of the cooling water in the cooling water circuit 250 are different, the storage battery heat exchanger 53 in the cooling water circuit 150 and the storage battery heat in the cooling water circuit 250 Cooling water having the same temperature is supplied to the exchanger 268 . Therefore, when having a plurality of

storage batteries

2 and 4, the temperature of the storage battery 2 and the temperature of the storage battery 4 can be adjusted with cooling water of the same temperature.

The refrigerant vaporized in the outdoor heat exchanger 23 and the refrigerant vaporized in the cooling water-refrigerant heat exchanger 26 flow into the gas-liquid separator 24 and are supplied to the electric compressor 21 again. In the simultaneous heat absorption mode, the refrigerant circulates through the refrigeration cycle circuit 20 and the cooling water circulates through the cooling water circuit 150 and the cooling water circuit 250 as described above, thereby heating the air flowing through the case 14 to heat the air in the vehicle interior. is heated.

As described above, in the simultaneous heat absorption mode, the outdoor heat exchanger 23 of the refrigeration cycle circuit 20 absorbs heat from the outside air to the refrigerant, and the outdoor heat exchanger 52 of the cooling water circuit 250 absorbs heat from the outside air to the cooling water, thereby cooling. In the water-refrigerant heat exchanger 26, heat is absorbed from the cooling water to the refrigerant. Therefore, since a plurality of heat absorption sources from the outside air can be provided, a decrease in the surface temperature of the heat exchange surfaces of the outdoor heat exchanger 23 and the outdoor heat exchanger 52 can be suppressed. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger 23 and the outdoor heat exchanger 52 when the temperature is low.

According to the above second embodiment, the following effects are obtained.

In the simultaneous heat absorption mode, when the outdoor heat exchanger 23 of the refrigeration cycle circuit 20 absorbs heat from the outside air to the refrigerant, the outdoor heat exchanger 52 of the cooling water circuit 50 absorbs heat from the outside air to the cooling water, and the drive system heat exchanger At 259, the cooling water is heated by exhaust heat of the driving motor 3, heat is absorbed from the cooling water to the cooling water at the cooling water-cooling water heat exchanger 58, and heat is transferred from the cooling water at the cooling water-refrigerant heat exchanger 26. It absorbs heat into the refrigerant. Therefore, since a plurality of heat absorption sources from the outside air can be provided, a decrease in the surface temperature of the heat exchange surfaces of the outdoor heat exchanger 23 and the outdoor heat exchanger 52 can be suppressed. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger 23 and the outdoor heat exchanger 52 when the temperature is low.

Note that in the temperature control system 201, the cooling water-cooling water heat exchanger 58, the bypass passage 56, and the three-way valve 57 constitute a first thermal coupler. However, the first heat coupler is a cooling water-cooling water heat exchanger (third heat exchanger) that exchanges heat between the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250 ), a reservoir for mixing the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250, and the cooling water circulating in the cooling water circuit 150 and the cooling water circulating in the cooling water circuit 250. and a four-way valve (common path flow path) where

(Third Embodiment)
A temperature control system 301 according to a third embodiment of the present invention will be described below with reference to FIGS. 14 to 19. FIG.

First, the overall configuration of the temperature control system 301 will be described with reference to FIG. FIG. 14 is a configuration diagram of the temperature control system 301. As shown in FIG.

The temperature control system 301 is a system mounted on the vehicle, which air-conditions the interior of the vehicle and adjusts the temperature of the storage battery 2 . The temperature control system 301 includes an air conditioner 10 and a cooling water circuit 305 through which cooling water circulates.

The cooling water circuit 305 includes a cooling water circuit 306 as a first cooling water circuit, a cooling water circuit 250, a cooling water-cooling water heat exchanger 58, and a four-way valve 358 as a second heat coupler. . The cooling water circuit 306 includes a cooling water circuit 350 as a third cooling water circuit in which cooling water circulates, and a cooling water circuit 450 as a fourth cooling water circuit in which cooling water circulates.

The cooling water circuit 350 includes an electric pump 351 as a third pump that sucks and discharges cooling water, a gas-liquid separator 355, a cooling water-refrigerant heat exchanger 26, a cooling water-cooling water heat exchanger 58, and a four-way valve 358 . At this time, the four-way valve 358 corresponds to the second thermal coupler.

The electric pump 351 is provided upstream of the cooling water-cooling water heat exchanger 58. The electric pump 351 is driven by an electric motor (not shown) to suck and discharge the cooling water in the cooling water circuit 350 and circulate it. The rotation speed of the electric pump 351 is controlled by a command signal from the controller.

A gas-liquid separator 355 is provided upstream of the electric pump 351 . The gas-liquid separator 355 separates air bubbles generated in the cooling water flowing through the cooling water circuit 350 and allows only liquid cooling water to flow into the electric pump 351 .

The cooling water-cooling water heat exchanger 58 is provided downstream of the electric pump 351 and upstream of the cooling water-refrigerant heat exchanger 26 .

A four-way valve 358 is provided downstream of the cooling water-refrigerant heat exchanger 26 and upstream of the electric pump 351 and gas-liquid separator 355 .

The cooling water circuit 450 has an electric pump 51 , a storage battery heat exchanger 53 , an electric hot water heater 54 , a gas-liquid separator 55 , a four-way valve 358 , a bypass passage 56 and a three-way valve 57 .

A four-way valve 358 is provided downstream of the electric pump 51 and upstream of the electric water heater 54 .

The four-way valve 358 is switched by command signals from the controller. The four-way valve 358 separates the cooling water circuit 350 and the cooling water circuit 450 to independently circulate the cooling water, and connects the cooling water circuit 350 and the cooling water circuit 450 to continuously connect the cooling water. and a connected state that circulates the When the four-way valve 358 is switched to the connected state, the cooling water sucked and discharged by the electric pump 51 is guided to the gas-liquid separator 355, and the cooling water that has passed through the cooling water-refrigerant heat exchanger 26 is converted into electricity. It is led to the hot water heater 54 . That is, the four-way valve 358 switches between thermal connection and separation between the cooling water circulating in the cooling water circuit 350 and the cooling water circulating in the cooling water circuit 450 .

Next, each operation mode of the temperature control system 301 will be described with reference to FIGS. 15 to 19. FIG. 15 to 19, thick solid lines indicate portions through which the refrigerant or cooling water flows, and thin solid lines indicate portions in which the refrigerant or cooling water stops flowing.

<Simultaneous endothermic mode>
FIG. 15 is a diagram illustrating a case where the temperature control system 301 is operated in the simultaneous heat absorption mode and the air conditioner 10 performs heating operation.

In the cooling water circuit 250, an electric pump 251 operates to circulate the cooling water. The three-way valve 257 is switched to the normal state in which cooling water flows through the cooling water-cooling water heat exchanger 58 .

In the cooling water circuit 350, an electric pump 351 operates to circulate the cooling water.

In the cooling water circuit 450, the electric pump 51 operates to circulate the cooling water. Electric hot water heater 54 heats the cooling water in cooling water circuit 350 . The three-way valve 57 is switched to a normal state in which cooling water flows through the battery heat exchanger 53 .

The four-way valve 358 is switched to a separated state in which the cooling water circuit 350 and the cooling water circuit 450 are separated and the cooling water is circulated independently.

On the other hand, the refrigerant introduced to the variable throttle mechanism 29 via the bypass passage 30 is decompressed and expanded by the variable throttle mechanism 29 and flows into the coolant-refrigerant heat exchanger 26 . The refrigerant that has flowed into the cooling water-refrigerant heat exchanger 26 exchanges heat with the cooling water in the cooling water circuit 350 and is vaporized.

At this time, the cooling water is circulating in the cooling water circuit 350 by the electric pump 351 . The cooling water whose temperature has been lowered by exchanging heat with the refrigerant in the cooling water-refrigerant heat exchanger 26 passes through the gas-liquid separator 355 and the electric pump 351 and is guided to the cooling water-cooling water heat exchanger 58. . In the cooling water-cooling water heat exchanger 58, heat exchange with the cooling water circulating in the cooling water circuit 250 raises the temperature of the cooling water. The cooling water whose temperature has risen in the cooling water-cooling water heat exchanger 58 is supplied to the cooling water-refrigerant heat exchanger 26 again.

Also, in the cooling water circuit 250 , the cooling water is circulated by an electric pump 251 . The cooling water whose temperature has been lowered by exchanging heat with the cooling water circulating in the cooling water circuit 150 in the cooling water-cooling water heat exchanger 58 passes through the gas-liquid separator 255 and the electric pump 251 to perform outdoor heat exchange. It is guided to vessel 52 . In the outdoor heat exchanger 52, the temperature of the cooling water rises due to heat exchange with the outside air. The cooling water whose temperature has risen in the outdoor heat exchanger 52 passes through the three-way valve 257 and is supplied to the cooling water-refrigerant heat exchanger 26 again. As a result, heat is absorbed from the outside air to the cooling water in the outdoor heat exchanger 52 of the cooling water circuit 250, heat is absorbed from the cooling water to the cooling water in the cooling water-cooling water heat exchanger 58, and the cooling water-refrigerant heat exchanger At 26 heat can be absorbed from the cooling water to the refrigerant.

On the other hand, in the cooling water circuit 450, the cooling water is circulated by the electric pump 51. At this time, since the four-way valve 358 is switched to the separated state in which the cooling water circuit 350 and the cooling water circuit 450 are separated and the cooling water is circulated independently, the cooling water sucked and discharged by the electric pump 51 is , is heated by an electric hot water heater 54 , passes through a three-way valve 57 and is led to a storage battery heat exchanger 53 . In the storage battery heat exchanger 53, the storage battery 2 is heated by heat exchange with cooling water. The cooling water that has heated the storage battery 2 passes through the gas-liquid separator 55 and is supplied to the electric pump 51 again.

Thus, in the temperature control system 301, the refrigerant in the refrigeration cycle circuit 20 absorbs heat from the outdoor heat exchanger 52 via the cooling water-cooling water heat exchanger 58 and the cooling water-refrigerant heat exchanger 26, and the storage battery 2 can be warmed.

The refrigerant vaporized in the outdoor heat exchanger 23 and the refrigerant vaporized in the cooling water-refrigerant heat exchanger 26 flow into the gas-liquid separator 24 and are supplied to the electric compressor 21 again. In the simultaneous heat absorption mode, as described above, the refrigerant circulates through the refrigeration cycle circuit 20, and the cooling water circulates through the cooling

water circuits

250, 350, and 450, so that the air flowing through the case 14 is The vehicle interior is heated by heating.

As described above, in the simultaneous heat absorption mode, the outdoor heat exchanger 23 of the refrigeration cycle circuit 20 absorbs heat from the outside air to the refrigerant, and the outdoor heat exchanger 52 of the cooling water circuit 250 absorbs heat from the outside air to the cooling water, thereby cooling. The water-cooling water heat exchanger 58 absorbs heat from the cooling water to the cooling water, and the cooling water-refrigerant heat exchanger 26 absorbs heat from the cooling water to the refrigerant. Therefore, since a plurality of heat absorption sources from the outside air can be provided, a decrease in the surface temperature of the heat exchange surfaces of the outdoor heat exchanger 23 and the outdoor heat exchanger 52 can be suppressed. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger 23 when the temperature is low.

Further, in the temperature control system 301, the refrigerant in the refrigeration cycle circuit 20 absorbs heat from the outdoor heat exchanger 52 via the cooling water-cooling water heat exchanger 58 and the cooling water-refrigerant heat exchanger 26, and the storage battery 2 is absorbed. Warming is possible.

<Third single endothermic mode>
FIG. 16 is a diagram illustrating a case where the temperature control system 301 is operated in the third single heat absorption mode and the air conditioner 10 performs heating operation. The third single endothermic mode is a mode that operates when the inside of the vehicle is heated when the outside air temperature is extremely low (eg -20° C. or lower).

In the cooling water circuit 250, an electric pump 251 operates to circulate the cooling water. The three-way valve 257 is switched to a bypass state in which the cooling water bypasses the cooling water-cooling water heat exchanger 58 and flows through the bypass passage 256 .

The four-way valve 358 is switched to a connected state in which the cooling water circuit 350 and the cooling water circuit 450 are connected to continuously circulate the cooling water.

In the cooling water circuit 306 , the electric pump 351 and the electric pump 51 are operated to continuously circulate the cooling water between the cooling water circuit 350 and the cooling water circuit 450 . Electric hot water heater 54 heats the cooling water in cooling water circuit 305 . The three-way valve 57 is switched to a bypass state in which the cooling water bypasses the storage battery heat exchanger 53 and flows through the bypass passage 56 .

The refrigerant liquefied in the heater core 22 passes through the bypass passage 30 and is led to the variable throttle mechanism 29 . The refrigerant flowing into the variable throttle mechanism 29 is decompressed and expanded through the variable throttle mechanism 29 and flows into the cooling water-refrigerant heat exchanger 26 . The refrigerant that has flowed into the cooling water-refrigerant heat exchanger 26 exchanges heat with the cooling water in the cooling water circuit 306 and is vaporized.

At this time, the cooling water is circulating in the cooling water circuit 306 by the

electric pumps

351 and 51 . The cooling water whose temperature has been lowered by exchanging heat with the refrigerant in the cooling water-refrigerant heat exchanger 26 is guided to the electric water heater 54 and heated. The cooling water heated by the electric water heater 54 passes through a three-way valve 57, a gas-liquid separator 55, an electric pump 51, a four-way valve 358, a gas-liquid separator 355, an electric pump 351, and a cooling water-cooling water heat exchanger. 58 and is led to the cooling water-refrigerant heat exchanger 26 again. In the cooling water-cooling water heat exchanger 58, since the three-way valve 257 is switched to the bypass state, heat exchange with the cooling water in the cooling water circuit 250 is not performed. As a result, the electric hot water heater 54 of the cooling water circuit 305 can heat the cooling water, and the cooling water-refrigerant heat exchanger 26 can absorb heat from the cooling water to the refrigerant.

As described above, in the temperature control system 301 , it is possible for the cooling water heated by the electric water heater 54 to absorb heat into the refrigerant in the refrigeration cycle circuit 20 .

The refrigerant vaporized in the cooling water-refrigerant heat exchanger 26 flows into the gas-liquid separator 24 and is supplied to the electric compressor 21 again. In the third single heat absorption mode, as described above, the refrigerant circulates through the refrigeration cycle circuit 20, and the cooling water circulates through the cooling water circuit 250 and the cooling water circuit 305, thereby heating the air flowing through the case 14, The vehicle interior is heated.

As described above, in the third single heat absorption mode, without absorbing heat in the outdoor heat exchanger 23 and the outdoor heat exchanger 52, from the cooling water heated by the electric water heater 54 to the cooling water-refrigerant heat exchanger 26 absorb heat into the refrigerant. Therefore, the heating operation can be performed even when the outside air temperature is extremely low. In addition, when the temperature of the storage battery 2 has decreased to a certain extent that it is necessary to heat it, the three-way valve 57 is switched to a mode in which cooling water flows through the storage battery heat exchanger 53 .

<Battery heating mode>
FIG. 17 is a diagram illustrating a case where the temperature control system 301 is operated in the storage battery heating mode. The storage battery warming mode is a mode that operates when the temperature of the storage battery 2 is low and it is necessary to heat the storage battery 2 .

The HVAC unit 11 and the refrigeration cycle circuit 20 are appropriately operated according to the required operation mode of the air conditioner 10 .

In the cooling water circuit 350, the electric pump 351 is stopped to stop circulation of the cooling water.

In the cooling water circuit 450, the electric pump 51 operates to circulate the cooling water. Electric hot water heater 54 heats the cooling water in cooling water circuit 350 . The three-way valve 57 is switched to a normal state in which cooling water flows through the battery heat exchanger 53 . The four-way valve 358 is switched to a separated state in which the cooling water circuit 350 and the cooling water circuit 450 are separated and the cooling water is circulated independently. Therefore, cooling water circulates in the cooling water circuit 450 independently of the cooling water circuit 250 and the cooling water circuit 350 .

In the cooling water circuit 450, the cooling water is circulated by the electric pump 51. The cooling water sucked and discharged by the electric pump 51 is heated by the electric hot water heater 54 , passes through the three-way valve 57 and is led to the storage battery heat exchanger 53 . In the storage battery heat exchanger 53, the storage battery 2 is heated by heat exchange with cooling water. The cooling water that has heated the storage battery 2 passes through the gas-liquid separator 55 and is supplied to the electric pump 51 again.

Thus, the temperature control system 301 can heat the storage battery 2 using the cooling water heated by the electric water heater 54 .

<First storage battery cooling mode>
FIG. 18 is a diagram illustrating a case where temperature control system 301 is operated in the first battery cooling mode. The first storage battery cooling mode is a mode that operates when the temperature of the storage battery 2 is high and the storage battery 2 needs to be cooled.

In the cooling water circuit 306 , the electric pump 351 and the electric pump 51 are operated to continuously circulate the cooling water between the cooling water circuit 350 and the cooling water circuit 450 . Electric hot water heater 54 heats the cooling water in cooling water circuit 306 . The three-way valve 57 is switched to a normal state in which cooling water flows through the battery heat exchanger 53 .

At this time, the cooling water is circulating in the cooling water circuit 305 by the

electric pumps

351 and 51 . The cooling water whose temperature has been lowered by exchanging heat with the refrigerant in the cooling water-refrigerant heat exchanger 26 passes through the four-way valve 358, the electric water heater 54, and the three-way valve 57 and is led to the storage battery heat exchanger 53. . In the storage battery heat exchanger 53, the storage battery 2 is cooled by heat exchange with cooling water. The cooling water that has cooled the storage battery 2 passes through the gas-liquid separator 55, the electric pump 51, the four-way valve 358, the gas-liquid separator 355, the electric pump 351, and the cooling water-cooling water heat exchanger 58, and returns to the cooling water. - supplied to the refrigerant heat exchanger 26;

Thus, in the temperature control system 301, it is possible to cool the storage battery 2 using the cooling water cooled by the cooling water-refrigerant heat exchanger .

<Second storage battery cooling mode>
FIG. 19 is a diagram illustrating a case where temperature control system 301 is operated in the second battery cooling mode. The second storage battery cooling mode is a mode that operates when the temperature of the storage battery 2 is high and the storage battery 2 needs to be cooled.

In the cooling water circuit 305 , the electric pump 351 and the electric pump 51 operate to continuously circulate the cooling water between the cooling water circuit 350 and the cooling water circuit 450 . The three-way valve 57 is switched to a normal state in which cooling water flows through the battery heat exchanger 53 .

In the cooling water circuit 250 , the cooling water sucked and discharged by the electric pump 251 is guided to the outdoor heat exchanger 52 . In the outdoor heat exchanger 52, the temperature is lowered by heat exchange with the outside air. The cooling water whose temperature has decreased in the outdoor heat exchanger 52 passes through the drive system heat exchanger 259, the three-way valve 257, the cooling water-refrigerant heat exchanger 26, and the gas-liquid separator 255, and the electric pump 251 again. supplied to

In the cooling water circuit 305 , the cooling water is circulated by the

electric pumps

351 and 51 . The cooling water whose temperature has been lowered by exchanging heat with the cooling water in the cooling water circuit 250 in the cooling water-cooling water heat exchanger 58 is sent to the cooling water-refrigerant heat exchanger 26, the four-way valve 358, and the electric hot water heater 54. , and the three-way valve 57 to the storage battery heat exchanger 53 . In the storage battery heat exchanger 53, the storage battery 2 is cooled by heat exchange with cooling water. The cooling water that has cooled the storage battery 2 passes through the gas-liquid separator 55, the electric pump 51, the four-way valve 358, the gas-liquid separator 355, and the electric pump 351, and is supplied again to the cooling water-cooling water heat exchanger 58. be.

Thus, in the temperature control system 301, it is possible to cool the storage battery 2 using the cooling water cooled by the outdoor heat exchanger 52.

According to the above third embodiment, the following effects are obtained.

In the simultaneous heat absorption mode, when the outdoor heat exchanger 23 of the refrigeration cycle circuit 20 absorbs heat from the outside air to the refrigerant, the outdoor heat exchanger 52 of the cooling water circuit 250 absorbs heat from the outside air to the cooling water, cooling water - cooling water The heat exchanger 58 absorbs heat from the cooling water to the cooling water, and the cooling water-refrigerant heat exchanger 26 absorbs heat from the cooling water to the refrigerant. Therefore, since a plurality of heat absorption sources from the outside air can be provided, a decrease in the surface temperature of the heat exchange surfaces of the outdoor heat exchanger 23 and the outdoor heat exchanger 52 can be suppressed. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger 23 when the temperature is low.

Also, the temperature control system 301 can adjust the temperature of the storage battery 2 by operating in the storage battery heating mode, the first storage battery cooling mode, or the second storage battery cooling mode.

(Fourth embodiment)
A temperature control system 401 according to a fourth embodiment of the present invention will be described below with reference to FIGS. 20 to 23. FIG. In each embodiment shown below, detailed description of each operation mode is omitted as appropriate, but operation in each operation mode and switching of operation modes are possible in the same manner as in the first to third embodiments.

First, the overall configuration of the temperature control system 401 will be described with reference to FIG. FIG. 20 is a configuration diagram of the temperature control system 401. As shown in FIG.

The temperature control system 401 is a system that is mounted on the vehicle, and adjusts the temperature of the storage battery 2 while air-conditioning the interior of the vehicle. The temperature control system 401 includes an air conditioner 10 and a cooling water circuit 405 through which cooling water circulates.

The cooling water circuit 405 includes a cooling water circuit 406 as a first cooling water circuit, a cooling water circuit 250, a four-way valve 358 as a third switching valve, and a four-way valve 458 as a first switching valve. The cooling water circuit 406 includes a cooling water circuit 350 and a cooling water circuit 450 . At this time, the four-way valve 458 constitutes the first thermal coupler, and the four-way valve 358 constitutes the second thermal coupler.

The cooling water circuit 250 has an electric pump 251 , an outdoor heat exchanger 52 , a gas-liquid separator 255 , a drive system heat exchanger 259 and a four-way valve 458 .

A four-way valve 458 is provided downstream of the drive system heat exchanger 259 and upstream of the electric pump 251 and the gas-liquid separator 255 .

The cooling water circuit 350 has a cooling water-refrigerant heat exchanger 26, a four-way valve 358, and a four-way valve 458.

A four-way valve 358 is provided downstream of the cooling water-refrigerant heat exchanger 26 . A four-way valve 458 is provided upstream of the cooling water-refrigerant heat exchanger 26 . At this time, the four-way valve 458 corresponds to the first thermal coupler.

The cooling water circuit 450 includes an electric pump 51, a storage battery heat exchanger 53, an electric hot water heater 54, a gas-liquid separator 55, a four-way valve 358, a bypass passage 56, a three-way valve 57, and a bypass passage 456. , a three-way valve 457, and an outdoor heat exchanger 452 as a third outdoor heat exchanger.

The four-way valve 358 is provided downstream of the three-way valve 457 and upstream of the electric water heater 54 .

A bypass passage 456 connects the upstream of the four-way valve 358 and the downstream of the electric pump 51 . Cooling water that bypasses the outdoor heat exchanger 452 flows through the bypass passage 456 .

The three-way valve 357 is switched by command signals from the controller. The three-way valve 457 switches between a normal state in which the cooling water flows through the outdoor heat exchanger 452 and a bypass state in which the cooling water bypasses the outdoor heat exchanger 452 and flows through the bypass passage 456 . When the three-way valve 457 is switched to the normal state, cooling water does not flow through the bypass passage 456 . On the other hand, when the three-way valve 457 is switched to the bypass state, cooling water does not flow through the outdoor heat exchanger 52 .

The outdoor heat exchanger 452 is provided downstream of the electric pump 51 and upstream of the four-way valve 358 when the three-way valve 457 is switched to the normal state. The outdoor heat exchanger 452 is arranged, for example, in the engine room of the vehicle (the motor room in electric vehicles). The outdoor heat exchanger 452 exchanges heat between the cooling water and the outside air. Outside air is introduced into the outdoor heat exchanger 452 by running of the vehicle or rotation of an outdoor fan (not shown).

The four-way valve 358 separates the cooling water circuit 350 and the cooling water circuit 450 to independently circulate the cooling water, and connects the cooling water circuit 350 and the cooling water circuit 450 to continuously connect the cooling water. and a connected state that circulates the When the four-way valve 358 is switched to the connected state, the cooling water sucked and discharged by the electric pump 51 is selected depending on the state of the three-way valve 357 to pass through the outdoor heat exchanger 452 or not. through the cooling water circuit 350 . Also, the cooling water that has passed through the cooling water-refrigerant heat exchanger 26 passes through the four-way valve 358 and is led to the electric water heater 54 . That is, the four-way valve 358 switches between thermal connection and separation between the cooling water circulating in the cooling water circuit 350 and the cooling water circulating in the cooling water circuit 450 .

The four-way valve 458 is switched by command signals from the controller. The four-way valve 458 separates the cooling water circuit 250 and the cooling water circuit 350 to independently circulate the cooling water, and connects the cooling water circuit 250 and the cooling water circuit 350 to continuously connect the cooling water. and a connected state that circulates the In other words, the cooling water circuit 150 and the cooling water circuit 250 have independent flow paths that stop heat exchange, mixing, and merging so that they can be thermally independent. When the four-way valve 458 is switched to the connected state, the cooling water sucked and discharged by the electric pump 251 passes through the outdoor heat exchanger 52, the drive system heat exchanger 259, and the four-way valve 458, and the cooling water-refrigerant It is led to heat exchanger 26 . Also, the cooling water that has passed through the cooling water-refrigerant heat exchanger 26 passes through the four-way valve 358, the four-way valve 458, and the gas-liquid separator 255 and is led to the electric pump 251 again. That is, the four-way valve 458 switches between thermal connection and separation between the cooling water circulating in the cooling water circuit 250 and the cooling water circulating in the cooling water circuit 350 .

Next, the simultaneous heat absorption mode of the temperature control system 401 will be described with reference to FIGS. 21 and 22. FIG. In FIGS. 21 and 22, thick solid lines indicate portions through which the coolant or cooling water flows, and thin solid lines indicate portions where the coolant or cooling water stops flowing.

<Simultaneous endothermic mode>
FIG. 21 is a diagram illustrating a case where the temperature control system 401 is operated in the simultaneous heat absorption mode, the air conditioner 10 performs heating operation, and the storage battery 2 is cooled.

In the cooling water circuit 250, an electric pump 251 operates to circulate the cooling water.

In the cooling water circuit 450, the electric pump 51 operates to circulate the cooling water. The three-way valve 57 is switched to a normal state in which cooling water flows through the battery heat exchanger 53 . The three-way valve 457 is switched to a normal state in which cooling water flows through the outdoor heat exchanger 452 .

The four-way valve 358 is switched to a separated state in which the cooling water circuit 350 and the cooling water circuit 450 are separated and the cooling water is circulated independently. The four-way valve 458 is switched to a connected state in which the cooling water circuit 250 and the cooling water circuit 350 are connected to continuously circulate the cooling water.

At this time, the cooling water is circulating in the cooling water circuit 406 by the electric pump 251 . The cooling water whose temperature has decreased by exchanging heat with the refrigerant in the cooling water-refrigerant heat exchanger 26 passes through the four-way valve 358, the four-way valve 458, the gas-liquid separator 255, and the electric pump 251 to perform outdoor heat exchange. It is guided to vessel 52 . In the outdoor heat exchanger 52, the temperature of the cooling water rises due to heat exchange with the outside air. The cooling water whose temperature has risen in the outdoor heat exchanger 52 is further heated in the drive system heat exchanger 259, passes through the four-way valve 458, and is supplied to the cooling water-refrigerant heat exchanger 26 again.

On the other hand, in the cooling water circuit 450, the cooling water is circulated by the electric pump 51. Cooling water sucked and discharged by the electric pump 51 passes through the three-way valve 457 and is led to the outdoor heat exchanger 452 to be cooled. At this time, since the four-way valve 358 is switched to the separated state in which the cooling water circuit 350 and the cooling water circuit 450 are separated and the cooling water is circulated independently, Water passes through the four-way valve 358 , the electric water heater 54 and the three-way valve 57 and is led to the storage battery heat exchanger 53 . In the storage battery heat exchanger 53, the storage battery 2 is cooled by heat exchange with cooling water. The cooling water whose temperature has risen by cooling the storage battery 2 passes through the gas-liquid separator 55 and is supplied to the electric pump 51 again.

Thus, in the temperature control system 401, the refrigerant in the refrigeration cycle circuit 20 absorbs heat from the outdoor heat exchanger 52 via the cooling water-cooling water heat exchanger 58 and the cooling water-refrigerant heat exchanger 26, and It is possible to cool the storage battery 2 by releasing heat from the cooling water in the cooling water circuit 450 in the heat exchanger 452 .

The refrigerant vaporized in the outdoor heat exchanger 23 and the refrigerant vaporized in the cooling water-refrigerant heat exchanger 26 flow into the gas-liquid separator 24 and are supplied to the electric compressor 21 again. In the simultaneous heat absorption mode, as described above, the refrigerant circulates through the refrigerating cycle circuit 20, and the cooling water circulates through the cooling

water circuits

250 and 350, thereby heating the air flowing through the case 14, thereby is heated.

FIG. 22 is a diagram illustrating a case where the temperature control system 401 is operated in the simultaneous heat absorption mode, the air conditioner 10 performs heating operation, and the storage battery 2 is heated.

At this time, in the cooling water circuit 450 , the three-way valve 457 is switched to a bypass state in which the cooling water bypasses the outdoor heat exchanger 452 and flows through the bypass passage 456 . Electric hot water heater 54 heats the cooling water in cooling water circuit 250 .

In the cooling water circuit 450, the cooling water is circulated by the electric pump 51. At this time, the four-way valve 358 is switched to the separated state in which the cooling water circuit 350 and the cooling water circuit 450 are separated and the cooling water is circulated independently, so that the cooling water sucked and discharged by the electric pump 51 is , the three-way valve 457 and the four-way valve 358 to the electric water heater 54 to be heated. The cooling water heated by the electric hot water heater 54 passes through the three-way valve 57 and is led to the storage battery heat exchanger 53 . In the storage battery heat exchanger 53, the storage battery 2 is heated by heat exchange with cooling water. The cooling water whose temperature has been lowered by heating the storage battery 2 passes through the gas-liquid separator 55 and is supplied to the electric pump 51 again.

Thus, the temperature control system 401 can heat the storage battery 2 using the cooling water in the cooling water circuit 450 heated by the electric water heater 54 .

(Modified example of the fourth embodiment)
A temperature control system 401 according to a modification of the fourth embodiment of the present invention will be described below with reference to FIG. FIG. 23 is a configuration diagram of the temperature control system 401. As shown in FIG.

In this modification, the outdoor heat exchanger 52 of the cooling water circuit 250 and the outdoor heat exchanger 452 of the cooling water circuit 450 are integrally provided. This makes it possible to simplify the layout of the outdoor heat exchanger 52 and the outdoor heat exchanger 452 in the vehicle.

According to the above fourth embodiment, the following effects are obtained.

In the simultaneous heat absorption mode, when the outdoor heat exchanger 23 of the refrigeration cycle circuit 20 absorbs heat from the outside air to the refrigerant, the outdoor heat exchanger 52 of the cooling water circuit 250 absorbs heat from the outside air to the cooling water, cooling water-refrigerant heat Heat is absorbed from the cooling water to the refrigerant in the exchanger 26 . Therefore, since a plurality of heat absorption sources from the outside air can be provided, a decrease in the surface temperature of the heat exchange surfaces of the outdoor heat exchanger 23 and the outdoor heat exchanger 52 can be suppressed. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger 23 and the outdoor heat exchanger 52 when the temperature is low.

Also, in the cooling water circuit 450 , the cooling water is circulated by the electric pump 51 . Cooling water sucked and discharged by the electric pump 51 passes through the three-way valve 457 and is led to the outdoor heat exchanger 452 to be cooled. At this time, since the four-way valve 358 is switched to the separated state in which the cooling water circuit 350 and the cooling water circuit 450 are separated and the cooling water is circulated independently, Water passes through the four-way valve 358 , the electric water heater 54 and the three-way valve 57 and is led to the storage battery heat exchanger 53 . In the storage battery heat exchanger 53, the storage battery 2 is cooled by heat exchange with cooling water.

Also, in the cooling water circuit 450 , the cooling water is circulated by the electric pump 51 . At this time, the four-way valve 358 is switched to the separated state in which the cooling water circuit 350 and the cooling water circuit 450 are separated and the cooling water is circulated independently, so that the cooling water sucked and discharged by the electric pump 51 is , the three-way valve 457 and the four-way valve 358 to the electric water heater 54 to be heated. The cooling water heated by the electric hot water heater 54 passes through the three-way valve 57 and is led to the storage battery heat exchanger 53 . In the storage battery heat exchanger 53, the storage battery 2 is heated by heat exchange with cooling water.

Therefore, in the temperature control system 401, heat is absorbed from the outdoor heat exchanger 52 to the refrigerant in the refrigeration cycle circuit 20 via the cooling water-cooling water heat exchanger 58 and the cooling water-refrigerant heat exchanger 26, and the cooling water circuit Cooling water in 450 can be used to regulate the temperature of storage battery 2 .

(Fifth embodiment)
A temperature control system 501 according to a fifth embodiment of the present invention will be described below with reference to FIGS. 24 and 25. FIG.

First, the overall configuration of the temperature control system 501 will be described with reference to FIG. FIG. 24 is a configuration diagram of the temperature control system 501. As shown in FIG.

The temperature control system 501 is a system mounted on the vehicle, and performs air conditioning in the vehicle interior and adjusts the temperatures of the storage battery 2 and the storage battery 4 . The temperature control system 501 includes an air conditioner 10 and a cooling water circuit 505 through which cooling water circulates.

The cooling water circuit 505 includes a cooling water circuit 506 as a first cooling water circuit, a cooling water circuit 250, a cooling water-cooling water heat exchanger 58, and a water reservoir 558. The cooling water circuit 506 includes a cooling water circuit 350 and a cooling water circuit 450 .

The cooling water circuit 250 includes an electric pump 251, an outdoor heat exchanger 52, a gas-liquid separator 255, a drive system heat exchanger 259, a bypass passage 256, a three-way valve 257, and cooling water-cooling water heat exchange. a vessel 58;

The cooling water-cooling water heat exchanger 58 is provided integrally with the cooling water-refrigerant heat exchanger 26.

The cooling water circuit 350 includes an electric pump 351, a storage battery heat exchanger 353 as a second storage battery heat exchanger that exchanges heat with the storage battery 4 as a second storage battery, a bypass passage (fifth bypass passage) 356, a bypass It has a channel switching valve 657 as a switching valve (fifth bypass switching valve), a cooling water-cooling water heat exchanger 58 , a cooling water-refrigerant heat exchanger 26 , and a water reservoir 558 .

The storage battery heat exchanger 353 exchanges heat between the storage battery 4 and cooling water. The storage battery heat exchanger 353 heats the storage battery 4 with high-temperature cooling water or cools the storage battery 4 with low-temperature cooling water.

The bypass passage 356 connects the upstream of the battery heat exchanger 353 and the downstream of the battery heat exchanger 353 . Cooling water that bypasses the storage battery heat exchanger 353 flows through the bypass passage 356 .

The flow path switching valve 657 switches between a closed state in which the cooling water flows through the battery heat exchanger 353 and an open state in which the cooling water bypasses the battery heat exchanger 353 and flows through the bypass passage 356 . The channel switching valve 657 is switched by a command signal from the controller. When the channel switching valve 657 is switched to the closed state, the cooling water does not flow through the bypass passage 356 . On the other hand, when the channel switching valve 657 is switched to the open state, the cooling water does not flow through the storage battery heat exchanger 353 .

The cooling water-cooling water heat exchanger 58 is provided downstream of the electric pump 351 and upstream of the cooling water-refrigerant heat exchanger 26 when the flow switching valve 657 is open, and when the flow switching valve 657 is closed. It is sometimes provided downstream of the battery heat exchanger 353 and upstream of the coolant-to-refrigerant heat exchanger 26 .

The cooling water-refrigerant heat exchanger 26 is provided downstream of the cooling water-cooling water heat exchanger 58 and upstream of the water reservoir 558 .

The water reservoir 558 is provided downstream of the coolant-refrigerant heat exchanger 26 and upstream of the electric pump 351 .

The cooling water circuit 450 includes an electric pump 51, a storage battery heat exchanger 53, an electric hot water heater 54, a bypass passage (sixth bypass passage) 56, and a passage switching as a bypass switching valve (sixth bypass switching valve). It has a valve 557 , a bypass passage (eighth bypass passage) 456 , a three-way valve (eighth bypass switching valve) 457 , an outdoor heat exchanger 452 , and a water reservoir 558 . At this time, the reservoir 558 constitutes the second thermal coupler.

The electric hot water heater 54 heats the cooling water when the three-way valve 457 is switched to the bypass state and cooling water is flowing through the bypass passage 456 .

The flow path switching valve 557 switches between a closed state in which the cooling water flows through the battery heat exchanger 53 and an open state in which the cooling water bypasses the battery heat exchanger 53 and flows through the bypass passage 56 . The channel switching valve 557 is switched by a command signal from the controller. When the channel switching valve 557 is switched to the closed state, cooling water does not flow through the bypass passage 56 . On the other hand, when the channel switching valve 557 is switched to the open state, cooling water does not flow through the storage battery heat exchanger 53 .

The water reservoir 558 is provided downstream of the outdoor heat exchanger 452 and upstream of the electric pump 51 when the three-way valve 457 is in a normal state, and is provided downstream of the electric water heater 54 and upstream of the electric pump 51 when the three-way valve 457 is in a bypass state. provided in

The water reservoir 558 mixes the cooling water circulating in the cooling water circuit 350 and the cooling water circulating in the cooling water circuit 450 and supplies them again. That is, the cooling water in the cooling water circuit 350 is cooled by the cooling water-refrigerant heat exchanger 26, and the cooling water in the cooling water circuit 350 and the cooling water in the cooling water circuit 450 are mixed in the water reservoir 558. Cooling water is split from 558 to cooling water circuit 350 and cooling water circuit 450 . As a result, even when the temperature of the cooling water in the cooling water circuit 350 and the temperature of the cooling water in the cooling water circuit 450 are different, the storage battery heat exchanger 353 in the cooling water circuit 350 and the storage battery heat in the cooling water circuit 450 Cooling water having the same temperature is supplied to the exchanger 53 . Therefore, when having a plurality of

storage batteries

Next, the simultaneous heat absorption mode of the temperature control system 401 will be described with reference to FIG. In FIG. 25 , a thick solid line indicates a portion through which the refrigerant or cooling water flows, and a thin solid line indicates a portion where the refrigerant or cooling water stops flowing.

<Simultaneous endothermic mode>
FIG. 25 is a diagram illustrating a case where the temperature control system 501 is operated in the simultaneous heat absorption mode and the air conditioner 10 performs heating operation.

In the cooling water circuit 350, an electric pump 351 operates to circulate the cooling water. The channel switching valve 657 is switched to a closed state in which cooling water flows through the storage battery heat exchanger 353 .

In the cooling water circuit 450, the electric pump 51 operates to circulate the cooling water. Electric hot water heater 54 heats the cooling water in cooling water circuit 350 . The channel switching valve 557 is switched to a closed state in which the cooling water flows through the storage battery heat exchanger 53 . The three-way valve 457 is switched to a bypass state in which cooling water bypasses the outdoor heat exchanger 452 and flows through the bypass passage 456 . The electric hot water heater 54 heats the cooling water when the cooling water is flowing through the bypass passage 456 .

At this time, the cooling water is circulating in the cooling water circuit 350 by the electric pump 351 . The cooling water whose temperature has been lowered by exchanging heat with the refrigerant in the cooling water-refrigerant heat exchanger 26 is guided to the water reservoir 558 . In the water reservoir 558 , the cooling water is mixed with the cooling water circulating in the cooling water circuit 450 and supplied to the electric pump 351 again. The cooling water sucked and discharged by the electric pump 351 heats the storage battery 4 in the storage battery heat exchanger 353 . The cooling water that has heated the storage battery 4 in the storage battery heat exchanger 353 is guided to the cooling water-cooling water heat exchanger 58 . In the cooling water-cooling water heat exchanger 58, heat exchange with the cooling water circulating in the cooling water circuit 250 raises the temperature of the cooling water. The cooling water whose temperature has risen in the cooling water-cooling water heat exchanger 58 is supplied to the cooling water-refrigerant heat exchanger 26 again.

Cooling water is circulated by an electric pump 251 in the cooling water circuit 250 . The cooling water whose temperature has been lowered by exchanging heat with the cooling water circulating in the cooling water circuit 350 in the cooling water-cooling water heat exchanger 58 passes through the gas-liquid separator 255 and the electric pump 251 to perform outdoor heat exchange. It is guided to vessel 52 . In the outdoor heat exchanger 52, the temperature of the cooling water rises due to heat exchange with the outside air. The cooling water whose temperature has risen in the outdoor heat exchanger 52 passes through the three-way valve 257 and is supplied to the cooling water-cooling water heat exchanger 58 again. As a result, heat is absorbed from the outside air to the cooling water in the outdoor heat exchanger 52 of the cooling water circuit 250, heat is absorbed from the cooling water to the cooling water in the cooling water-cooling water heat exchanger 58, and the cooling water-refrigerant heat exchanger At 26 heat can be absorbed from the cooling water to the refrigerant.

On the other hand, in the cooling water circuit 450, the cooling water is circulated by the electric pump 51. The cooling water sucked and discharged by the electric pump 51 heats the storage battery 2 in the storage battery heat exchanger 53 . The cooling water that has heated the storage battery 2 in the storage battery heat exchanger 53 is heated by the electric water heater 54 , passes through the three-way valve 357 and is led to the outdoor heat exchanger 452 . In the outdoor heat exchanger 452, the temperature of the cooling water rises due to heat exchange with the outside air. The cooling water whose temperature has risen in the outdoor heat exchanger 452 is guided to the water reservoir 558 . In the water reservoir 558 , the cooling water is mixed with the cooling water circulating in the cooling water circuit 350 and supplied to the electric pump 51 again.

water circuits

In addition, in the temperature control system 501, heat is absorbed from the outdoor heat exchanger 52 to the refrigerant in the refrigeration cycle circuit 20 via the cooling water-cooling water heat exchanger 58 and the cooling water-refrigerant heat exchanger 26, and the

storage battery

2, 4 can be warmed.

According to the fifth embodiment described above, the following effects are obtained.

In the simultaneous heat absorption mode, when the outdoor heat exchanger 23 of the refrigeration cycle circuit 20 absorbs heat from the outside air to the refrigerant, the outdoor heat exchanger 52 of the cooling water circuit 250 absorbs heat from the outside air to the cooling water, cooling water - cooling water The heat exchanger 58 absorbs heat from the cooling water to the cooling water, and the cooling water-refrigerant heat exchanger 26 absorbs heat from the cooling water to the refrigerant. Therefore, since a plurality of heat absorption sources from the outside air can be provided, a decrease in the surface temperature of the heat exchange surfaces of the outdoor heat exchanger 23 and the outdoor heat exchanger 52 can be suppressed. Therefore, it is possible to suppress the formation of frost on the outdoor heat exchanger 23 and the outdoor heat exchanger 52 when the temperature is low.

storage battery

2, 4 can be warmed.

Although the embodiments of the present invention have been described above, the above embodiments merely show a part of application examples of the present invention, and the technical scope of the present invention is not limited to the specific configurations of the above embodiments. do not have.

This application claims priority based on Japanese Patent Application No. 2021-013989 filed with the Japan Patent Office on January 29, 2021, and the entire contents of this application are incorporated herein by reference.

Claims

A vehicle temperature control system comprising:
a refrigeration cycle circuit in which a refrigerant circulates;
a cooling water circuit through which cooling water circulates;
with
The refrigeration cycle circuit includes a compressor that compresses a refrigerant, a first outdoor heat exchanger that exchanges heat between the refrigerant and the outside air, and heat of the refrigerant compressed by the compressor to heat the fluid. and a first heat exchanger that exchanges heat between the refrigerant and the cooling water in the cooling water circuit,
The cooling water circuit has a first pump that sucks and discharges cooling water, a second outdoor heat exchanger that exchanges heat between the cooling water and the outside air, and the first heat exchanger,
When the first outdoor heat exchanger absorbs heat from the outside air to the refrigerant, the second outdoor heat exchanger absorbs heat from the outside air to the cooling water, and the first heat exchanger absorbs heat from the cooling water to the refrigerant.
temperature control system.
The temperature control system of claim 1, wherein
The cooling water circuit is
a first cooling water circuit having the first heat exchanger and the first pump and through which cooling water circulates;
a second cooling water circuit having the second outdoor heat exchanger and a second pump for sucking and discharging cooling water, and through which the cooling water circulates;
a first thermal coupler for thermally coupling cooling water circulating in the first cooling water circuit and cooling water circulating in the second cooling water circuit;
comprising
temperature control system.
A temperature control system according to claim 2, wherein
The cooling water circulating in the second cooling water circuit has a higher flow rate than the cooling water circulating in the first cooling water circuit.
temperature control system.
A temperature control system according to claim 2, wherein
The first cooling water circuit further includes a first storage battery heat exchanger that exchanges heat with the first storage battery,
The second cooling water circuit further includes a drive system heat exchanger that exchanges heat with a drive system component that drives the vehicle.
temperature control system.
A temperature control system according to claim 4,
The first cooling water circuit is
a third cooling water circuit having the first heat exchanger and through which cooling water circulates;
a fourth cooling water circuit having the first storage battery heat exchanger and the first pump and through which cooling water circulates;
a second thermal coupler for switching between thermal connection and separation between the cooling water circulating in the third cooling water circuit and the cooling water circulating in the fourth cooling water circuit;
consisting of
temperature control system.
A temperature control system according to claim 5, wherein
The fourth cooling water circuit further has a third outdoor heat exchanger that exchanges heat between the cooling water and the outside air,
temperature control system.
A temperature control system according to claim 6, wherein
The second outdoor heat exchanger and the third outdoor heat exchanger are provided integrally,
temperature control system.
A temperature control system according to any one of claims 2 to 7,
The first thermal coupler is
a second heat exchanger that exchanges heat between the cooling water circulating in the first cooling water circuit and the cooling water circulating in the second cooling water circuit;
a first bypass passage through which cooling water flows so as to bypass the second heat exchanger;
a first bypass switching valve that switches between cooling water flowing through the second heat exchanger and cooling water flowing through the first bypass passage;
having
temperature control system.
A temperature control system according to any one of claims 2 to 7,
The first thermal coupler is
a reservoir for mixing cooling water circulating in the first cooling water circuit and cooling water circulating in the second cooling water circuit;
a second bypass passage through which cooling water flows so as to bypass the water reservoir;
a second bypass switching valve that switches between cooling water flowing through the water reservoir and cooling water flowing through the second bypass passage;
having
temperature control system.
A temperature control system according to any one of claims 2 to 7,
The first thermal coupler is
A connected state in which cooling water continuously flows through the first cooling water circuit and the second cooling water circuit, and a separated state in which cooling water circulates through each of the first cooling water circuit and the second cooling water circuit. and a first switching valve that switches between
temperature control system.
A temperature control system according to claim 2, wherein
The first cooling water circuit is
a first storage battery heat exchanger that exchanges heat with the first storage battery;
a third bypass passage through which cooling water flows so as to bypass the first storage battery heat exchanger;
a third bypass switching valve that switches between cooling water flowing through the first storage battery heat exchanger and cooling water flowing through the third bypass passage;
further having
The second cooling water circuit is
a second storage battery heat exchanger that exchanges heat with the second storage battery;
a fourth bypass passage through which cooling water flows so as to bypass the second storage battery heat exchanger;
a fourth bypass switching valve that switches between cooling water flowing through the second storage battery heat exchanger and cooling water flowing through the fourth bypass passage;
further having
The first thermal coupler is a reservoir for mixing cooling water circulating in the first cooling water circuit and cooling water circulating in the second cooling water circuit,
The cooling water of the first cooling water circuit is cooled by the first heat exchanger, and the cooling water of the first cooling water circuit and the cooling water of the second cooling water circuit are mixed in the water reservoir, cooling water is split from the water reservoir to the first cooling water circuit and the second cooling water circuit;
temperature control system.
A temperature control system according to claim 6, wherein
The third cooling water circuit is
a second storage battery heat exchanger that exchanges heat with the second storage battery;
a fifth bypass passage through which cooling water flows so as to bypass the second storage battery heat exchanger;
a fifth bypass switching valve that switches between cooling water flowing through the second storage battery heat exchanger and cooling water flowing through the fifth bypass passage;
has
The fourth cooling water circuit is
the first battery heat exchanger;
a sixth bypass passage through which cooling water flows so as to bypass the first storage battery heat exchanger;
a sixth bypass switching valve that switches between cooling water flowing through the first storage battery heat exchanger and cooling water flowing through the sixth bypass passage;
has
The second thermal coupler is a reservoir for mixing cooling water circulating in the third cooling water circuit and cooling water circulating in the fourth cooling water circuit,
The cooling water of the third cooling water circuit is cooled by the first heat exchanger, and the cooling water of the third cooling water circuit and the cooling water of the fourth cooling water circuit are mixed in the water reservoir, cooling water is split from the water reservoir to the third cooling water circuit and the fourth cooling water circuit;
temperature control system.
A temperature control system according to claim 11, comprising:
The second cooling water circuit is
a seventh bypass passage through which cooling water flows so as to bypass the first outdoor heat exchanger;
a seventh bypass switching valve that switches between cooling water flowing through the first outdoor heat exchanger and cooling water flowing through the seventh bypass passage;
a heater that heats the cooling water while the cooling water is flowing through the seventh bypass passage;
further comprising
temperature control system.
13. The temperature control system of claim 12, wherein
The fourth cooling water circuit is
an eighth bypass passage through which cooling water flows so as to bypass the third outdoor heat exchanger;
an eighth bypass switching valve that switches between cooling water flowing through the third outdoor heat exchanger and cooling water flowing through the eighth bypass passage;
a heater that heats the cooling water while the cooling water is flowing through the eighth bypass passage;
further comprising
temperature control system.
A temperature control system according to any one of claims 1 to 14,
The refrigeration cycle circuit is
When the first outdoor heat exchanger absorbs heat from the outside air to the refrigerant, the second outdoor heat exchanger absorbs heat from the outside air to the cooling water, and the first heat exchanger absorbs heat from the cooling water to the refrigerant. a simultaneous endothermic mode;
a first single heat absorption mode in which heat is absorbed from the outside air to the refrigerant only by the first outdoor heat exchanger;
A second single heat absorption mode in which heat is absorbed from the outside air to the cooling water only by the second outdoor heat exchanger and heat is absorbed from the cooling water to the refrigerant by the first heat exchanger;
is switchable between
temperature control system.
16. A temperature control system according to any one of claims 1 to 15,
The refrigeration cycle circuit is
The compressor, the radiator, the first outdoor heat exchanger, an evaporator acting as a first heat absorber, and allowing refrigerant to flow from the first outdoor heat exchanger to the first heat absorber. and a gas-liquid separator that separates the refrigerant into a liquid-phase refrigerant and a gas-phase refrigerant and guides the gas-phase refrigerant to the compressor. a loop;
a first branch passage through which a refrigerant flows, the first heat exchanger bypassing the first heat absorber in the main loop and acting as a second heat absorber;
a second branch passage through which refrigerant flows, having a first refrigerant bypass passage that bypasses the first outdoor heat exchanger in the main loop and a first on-off valve that opens and closes the first refrigerant bypass passage;
It has a second refrigerant bypass passage that bypasses the first check valve and the first heat absorber in the main loop, and a second on-off valve that opens and closes the second refrigerant bypass passage, through which refrigerant flows. a third branch channel;
has
When the first outdoor heat exchanger absorbs heat from the outside air to the refrigerant, the second outdoor heat exchanger absorbs heat from the outside air to the cooling water, and the first heat exchanger absorbs heat from the cooling water to the refrigerant.
temperature control system.
17. The temperature control system of claim 16, comprising:
The first check valve, the second refrigerant bypass passage, and the first on-off valve are provided in the gas-liquid separator,
temperature control system.
A vehicle temperature control system comprising:
a refrigeration cycle circuit in which a refrigerant circulates;
a cooling water circuit through which cooling water circulates;
with
The refrigeration cycle circuit includes a compressor that compresses a refrigerant, a first outdoor heat exchanger that exchanges heat between the refrigerant and the outside air, and heat of the refrigerant compressed by the compressor to heat the fluid. and a first heat exchanger that exchanges heat between the refrigerant and the cooling water in the cooling water circuit,
The cooling water circuit has a first pump that sucks and discharges cooling water, a second outdoor heat exchanger that exchanges heat between the cooling water and the outside air, and the first heat exchanger,
The cooling water circuit is
a first cooling water circuit having the first heat exchanger and the first pump and through which cooling water circulates;
a second cooling water circuit having the second outdoor heat exchanger and a second pump for sucking and discharging cooling water, and through which the cooling water circulates;
a first thermal coupler for thermally coupling cooling water circulating in the first cooling water circuit and cooling water circulating in the second cooling water circuit;
with
A flow rate of cooling water circulating in each of the first cooling water circuit and the second cooling water circuit can be individually changed,
When it is determined that frost has formed on the second outdoor heat exchanger, the flow rate of cooling water circulating through the second cooling water circuit is changed to the flow rate of cooling water circulating through the first cooling water circuit. do more than
temperature control system.
19. The temperature control system of claim 18, comprising:
The first cooling water circuit is
a third cooling water circuit having the first heat exchanger and through which cooling water circulates;
a fourth cooling water circuit having a first storage battery heat exchanger that exchanges heat with the first storage battery, and the first pump, and through which cooling water circulates;
a second thermal coupler for thermally coupling cooling water circulating in the third cooling water circuit and cooling water circulating in the fourth cooling water circuit;
consisting of
temperature control system.
A temperature control system according to claim 18 or 19,
The first heat coupler includes a third heat exchanger that exchanges heat between cooling water circulating in the first cooling water circuit and cooling water circulating in the second cooling water circuit; a water reservoir for mixing the cooling water circulating in the water circuit and the cooling water circulating in the second cooling water circuit; the cooling water circulating in the first cooling water circuit and the cooling water circulating in the second cooling water circuit; is either a common channel flow path where the
temperature control system.
21. The temperature control system of claim 20, comprising:
The first heat coupler has an independent flow path that stops heat exchange, mixing, and merging so that the first cooling water circuit and the second cooling water circuit can be thermally independent.
temperature control system.
20. A temperature control system according to claim 19, comprising:
The second thermal coupler is
A connected state in which cooling water continuously flows through the third cooling water circuit and the fourth cooling water circuit, and a separated state in which cooling water circulates through each of the third cooling water circuit and the fourth cooling water circuit. and a third switching valve that switches between
temperature control system.
19. The temperature control system of claim 18, comprising:
The first cooling water circuit is
a first storage battery heat exchanger that exchanges heat with the first storage battery;
a third bypass passage through which cooling water flows so as to bypass the first storage battery heat exchanger;
a third bypass switching valve that switches between cooling water flowing through the first storage battery heat exchanger and cooling water flowing through the third bypass passage;
further having
The second cooling water circuit is
a second storage battery heat exchanger that exchanges heat with the second storage battery;
a fourth bypass passage through which cooling water flows so as to bypass the second storage battery heat exchanger;
a fourth bypass switching valve that switches between cooling water flowing through the second storage battery heat exchanger and cooling water flowing through the fourth bypass passage;
further having
The first thermal coupler is a reservoir for mixing cooling water circulating in the first cooling water circuit and cooling water circulating in the second cooling water circuit,
The cooling water of the first cooling water circuit is cooled by the first heat exchanger, and the cooling water of the first cooling water circuit and the cooling water of the second cooling water circuit are mixed in the water reservoir, cooling water is split from the water reservoir to the first cooling water circuit and the second cooling water circuit;
temperature control system.
20. A temperature control system according to claim 19, comprising:
The third cooling water circuit is
a second storage battery heat exchanger that exchanges heat with the second storage battery;
a fifth bypass passage through which cooling water flows so as to bypass the second storage battery heat exchanger;
a fifth bypass switching valve that switches between cooling water flowing through the second storage battery heat exchanger and cooling water flowing through the fifth bypass passage;
has
The fourth cooling water circuit is
the first battery heat exchanger;
a sixth bypass passage through which cooling water flows so as to bypass the first storage battery heat exchanger;
a sixth bypass switching valve that switches between cooling water flowing through the first storage battery heat exchanger and cooling water flowing through the sixth bypass passage;
has
The second thermal coupler is a reservoir for mixing cooling water circulating in the third cooling water circuit and cooling water circulating in the fourth cooling water circuit,
The cooling water of the third cooling water circuit is cooled by the first heat exchanger, and the cooling water of the third cooling water circuit and the cooling water of the fourth cooling water circuit are mixed in the water reservoir, cooling water is split from the water reservoir to the third cooling water circuit and the fourth cooling water circuit;
temperature control system.
24. The temperature control system of claim 23, wherein
The second cooling water circuit is
a seventh bypass passage through which cooling water flows so as to bypass the second outdoor heat exchanger;
a seventh bypass switching valve that switches between cooling water flowing through the second outdoor heat exchanger and cooling water flowing through the seventh bypass passage;
a heater that heats the cooling water while the cooling water is flowing through the seventh bypass passage;
further comprising
temperature control system.
25. The temperature control system of claim 24, wherein
The fourth cooling water circuit is
a third outdoor heat exchanger that exchanges heat between the cooling water and the outside air;
an eighth bypass passage through which cooling water flows so as to bypass the third outdoor heat exchanger;
an eighth bypass switching valve that switches between cooling water flowing through the third outdoor heat exchanger and cooling water flowing through the eighth bypass passage;
a heater that heats the cooling water while the cooling water is flowing through the eighth bypass passage;
further comprising
temperature control system.