1. A thermal management device mounted on a vehicle, the thermal management device comprising:

a first thermal circuit in which a thermal medium circulates, the first thermal circuit having a heat exchanger path, a battery path, an electrical equipment path, and a radiator path that are connected to each other;

a second thermal loop in which a thermal medium circulates;

a heat exchanger that cools the heat medium in the heat exchanger path and heats the heat medium in the second thermal circuit by heat exchange between the heat medium in the heat exchanger path and the heat medium in the second thermal circuit;

a heater configured to heat the interior of the vehicle using the heat medium in the second heat circuit as a heat source;

a battery cooled by the battery path;

an electrical device cooled by the electrical device path;

a radiator that exchanges heat between the heat medium in the radiator path and outside air;

at least one control valve that changes a flow path of a heat medium in the first heat circuit; and

a control device for controlling the operation of the motor,

the control device is configured to execute a first action, a second action, and a third action,

in the first operation, the controller heats the heat medium in the radiator path by the radiator, exchanges heat by the heat exchanger, and heats by the heater in a state where the control valve is controlled so that the heat medium in the first heat circuit flows through a first circulation flow path including the heat exchanger path and the radiator path,

in the second operation, the controller cools the heat medium in the heat exchanger path by the heat exchanger in a state where the control valve is controlled so that the heat medium in the first heat circuit flows through a second circulation flow path that includes the heat exchanger path and the battery path and bypasses the radiator path,

in the third operation, the control device cools the heat medium in the radiator path by the radiator in a state where the control valve is controlled so that the heat medium in the first heat circuit flows through a third circulation flow path that includes the radiator path and the electrical equipment path and bypasses the heat exchanger path.

2. The thermal management apparatus of claim 1,

the control device is configured to execute the second operation and the third operation at the same time.

3. The thermal management apparatus of claim 1 or 2,

the first circulation flow path bypasses the battery path and the electrical equipment path.

4. A thermal management device according to any one of claims 1 to 3,

the second circulation flow path bypasses the electrical equipment path.

5. The thermal management device according to any one of claims 1 to 4,

the third circulation flow path bypasses the battery path.

6. The thermal management device according to any one of claims 1 to 5,

the thermal management device also has a cooler that cools the thermal medium in the second thermal loop.

Background

Patent document 1 discloses a heat management device mounted on a vehicle. The thermal management device has a plurality of thermal circuits (heater circuit, engine circuit, etc.) through which a thermal medium circulates. For example, the thermal management device heats the vehicle interior using a heat medium in a heater circuit as a heat source. In addition, the thermal management device cools the engine using a heat medium in the engine circuit. The heat medium in the engine circuit is cooled by the radiator.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2017-150352

Disclosure of Invention

In recent years, a heat circuit for cooling a battery is sometimes mounted on a vehicle. In the conventional heat management device, when the heat medium for cooling the battery flows through the radiator, the radiator cannot be used for cooling the electrical equipment, and when the heat medium for cooling the electrical equipment flows through the radiator, the radiator cannot be used for cooling the battery. In the present specification, a technique is proposed in which a heat management device capable of heating can independently cool a battery and an electric device.

The heat management device disclosed in the present specification may be mounted on a vehicle. The heat management device comprises: a first thermal circuit in which a thermal medium circulates, the first thermal circuit having a heat exchanger path, a battery path, an electrical equipment path, and a radiator path that are connected to each other; a second thermal loop in which a thermal medium circulates; a heat exchanger that cools the heat medium in the heat exchanger path and heats the heat medium in the second thermal circuit by heat exchange between the heat medium in the heat exchanger path and the heat medium in the second thermal circuit; a heater configured to heat the interior of the vehicle using the heat medium in the second heat circuit as a heat source; a battery cooled by the battery path; an electrical device cooled by the electrical device path; a radiator configured to exchange heat between the heat medium in the radiator path and outside air; at least one control valve that changes a flow path of a heat medium in the first heat circuit; and a control device. The control device is configured to execute a first action, a second action, and a third action. In the first operation, the controller heats the heat medium in the radiator path by the radiator, exchanges heat by the heat exchanger, and heats by the heater in a state where the control valve is controlled so that the heat medium in the first heat circuit flows through a first circulation flow path including the heat exchanger path and the radiator path. In the second operation, the controller cools the heat medium in the heat exchanger path by the heat exchanger in a state where the control valve is controlled so that the heat medium in the first heat circuit flows through a second circulation flow path that includes the heat exchanger path and the battery path and bypasses the radiator path. In the third operation, the control device cools the heat medium in the radiator path by the radiator in a state where the control valve is controlled so that the heat medium in the first heat circuit flows through a third circulation flow path that includes the radiator path and the electrical equipment path and bypasses the heat exchanger path.

The heat exchanger path, the battery path, the electrical equipment path, and the radiator path may be connected directly or via another path.

In the heat management device, in the first operation, the control valve is controlled so that the heat medium flows through the first circulation flow path including the heat exchanger path and the radiator path. In this state, the heat medium in the radiator path (i.e., in the first circulation flow path) is heated by the radiator, and therefore the heat medium in the second heat circuit is heated by heat exchange in the heat exchanger. Therefore, the heater can heat the heat medium in the second heat circuit as a heat source. In this way, heating can be performed in the first operation. In the second operation, the control valve is controlled so that the heat medium flows through a second circulation flow path that includes the heat exchanger path and the battery path and bypasses the radiator path. In this state, the heat medium in the heat exchanger path is cooled by the heat exchanger. The heat medium cooled by the heat exchanger can be supplied to the battery path through the second circulation flow path, and thus the battery can be cooled. In this way, in the second operation, the heat medium is not caused to flow through the radiator path, and the battery can be cooled by the heat exchanger. In the third operation, the control valve is controlled so that the heat medium flows through a third circulation flow path that includes the radiator path and the electrical equipment path and bypasses the heat exchanger path. In this state, the heat medium in the heat sink path is cooled by the heat sink. The heat medium cooled by the radiator is supplied to the electrical equipment path through the third circulation flow path, and therefore, the electrical equipment can be cooled. In this way, in the third operation, the heat medium is not allowed to flow through the heat exchanger, and the electric device can be cooled by the radiator. As described above, in the second operation, the battery can be cooled by the heat exchanger without flowing the heat medium through the radiator path, and in the third operation, the electric device can be cooled by the radiator without flowing the heat medium through the heat exchanger path. Therefore, according to the thermal management device, the battery and the electric device can be independently cooled.

Drawings

Fig. 1 is a circuit diagram of an embodiment of a thermal management device.

Fig. 2 is a circuit diagram showing a heating operation.

Fig. 3 is a circuit diagram showing a cooling operation.

Fig. 4 is a circuit diagram showing the battery cooling operation.

Fig. 5 is a circuit diagram showing an electric device cooling operation.

Fig. 6 is a circuit diagram of a thermal management device according to a modification.

Fig. 7 is a circuit diagram of a thermal management device according to a modification.

Description of the symbols

10: a first thermal loop; 20: a second thermal loop; 30: a third thermal loop; 41: a low temperature heat sink; 42: a three-way valve; 43: a drive axle; 48: a pump; 49: a three-way valve; 51: a storage battery; 52: a refrigerator; 53: a pump; 61: an expansion valve; 63: an evaporator; 64: an expansion valve; 65: a three-way valve; 66: a compressor; 67: a condenser; 68: a modulator; 72: a pump; 73: a three-way valve; 74: heating the core; 75: a high temperature heat sink; 80: a control device; 100: a thermal management device.

Detailed Description

The following describes technical elements of the thermal management device disclosed in the present specification. The following technical elements are useful independently of each other.

In the heat management device according to the example disclosed in the present specification, the control device may be configured to execute the second operation and the third operation at the same time.

In the heat management device according to the example disclosed in the present specification, the first circulation flow path may bypass the battery path and the electrical equipment path. Further, the second circulation flow path may bypass the electrical equipment path. In addition, the third circulation flow path may bypass the battery path.

According to these configurations, the temperature of the heat medium flowing through the first circulation flow path, the second circulation flow path, or the third circulation flow path is more stable.

The thermal management device according to an example disclosed in the present specification may further include a cooler that cools the heat medium in the second thermal circuit.

The thermal management device 100 of the embodiment shown in fig. 1 has a first thermal circuit 10, a second thermal circuit 20, and a third thermal circuit 30. The heat medium flows through the first heat circuit 10, the second heat circuit 20, and the third heat circuit 30. The flow paths of the heat medium are independent among the first heat circuit 10, the second heat circuit 20, and the third heat circuit 30. The materials of the heat medium in the first heat circuit 10, the second heat circuit 20, and the third heat circuit 30 may be the same or different. For example, Hydrofluorocarbons (Hydrofluorocarbons) can be used as the heat medium. The thermal management device 100 is mounted on a vehicle. The thermal management device 100 can perform a cooling operation for cooling the air in the vehicle interior by using the evaporator 63. The thermal management device 100 can perform a heating operation for heating air in the vehicle interior using the heater core 74. Thermal management device 100 can cool battery 51, transaxle 43, PCU (power control unit) 47, and SPU (intelligent power supply unit) 46.

The first thermal circuit 10 includes a low-temperature radiator path 11, a bypass path 12, an electrical equipment path 13, a battery path 14, a cooler path 15, a connection path 16, and a connection path 17.

The low temperature radiator path 11 is provided with a low temperature radiator 41. The low temperature radiator 41 exchanges heat between the heat medium in the low temperature radiator path 11 and outside air (i.e., air outside the vehicle). If the temperature of the outside air is lower than the temperature of the heat medium in the low temperature radiator path 11, the heat medium in the low temperature radiator path 11 is cooled by the low temperature radiator 41. If the temperature of the outside air is higher than the temperature of the heat medium in the low temperature radiator path 11, the heat medium in the low temperature radiator path 11 is heated by the low temperature radiator 41.

The downstream end of the electrical equipment path 13 is connected to the upstream end of the bypass path 12 and the upstream end of the low-temperature radiator path 11 via a three-way valve 42. An upstream end of the electrical equipment path 13 is connected to a downstream end of the bypass path 12 and a downstream end of the low-temperature radiator path 11. The electric equipment path 13 is provided with a pump 48. The pump 48 sends out the heat medium in the electrical equipment path 13 to the downstream. The three-way valve 42 switches the flow path between a state where the heat medium flows from the electrical equipment path 13 to the low-temperature radiator path 11 and a state where the heat medium flows from the electrical equipment path 13 to the bypass path 12. When the pump 48 is operated in a state where the three-way valve 42 is controlled to flow the heat medium from the electrical equipment path 13 to the low-temperature radiator path 11, the heat medium circulates in the circulation flow path constituted by the electrical equipment path 13 and the low-temperature radiator path 11. When the pump 48 is operated in a state where the three-way valve 42 is controlled to flow the heat medium from the electrical equipment path 13 to the bypass path 12, the heat medium circulates in the circulation flow path constituted by the electrical equipment path 13 and the bypass path 12.

The electrical equipment path 13 is provided with the SPU46, the PCU47, and the oil cooler 45. The SPU46 and PCU47 are disposed upstream of the pump 48, and the oil cooler 45 is disposed downstream of the pump 48. SPU46 and PCU47 are cooled by heat exchange with the thermal medium in electrical equipment path 13. The oil cooler 45 is a heat exchanger. The oil cooler 45 is connected to an oil circulation path 18. The oil cooler 45 cools the oil in the oil circulation passage 18 by heat exchange between the heat medium in the electrical equipment passage 13 and the oil in the oil circulation passage 18. The oil circulation passage 18 is disposed to pass through the inside of the transaxle 43. The transaxle 43 incorporates a motor. The motor built in the transaxle 43 is a traveling motor that rotates the driving wheels of the vehicle. A part of the oil circulation passage 18 is constituted by a sliding portion (i.e., a bearing portion) of the motor. That is, the oil in the oil circulation passage 18 is lubricating oil in the motor. An oil pump 44 is provided in the oil circulation passage 18. The oil pump 44 circulates oil in the oil circulation line 18. When the oil cooled by the oil cooler 45 is circulated through the oil circulation path 18, the motor built in the transaxle 43 is cooled. SPU46 controls the charging and discharging of battery 51. The PCU47 converts dc power supplied from the battery 51 into ac power, and supplies the ac power to a motor built in the transaxle 43.

The downstream end of the chiller path 15 is connected to the upstream end of the battery path 14 and the upstream end of the connection path 16 via a three-way valve 49. The upstream end of cooler path 15 is connected to the downstream end of battery path 14 and the downstream end of connection path 17. The upstream end of the connection path 17 is connected to the downstream end of the connection path 16 by the low-temperature radiator path 11. A pump 53 is provided in the refrigerator path 15. The pump 53 sends out the heat medium in the chiller path 15 to the downstream. The three-way valve 49 switches the flow path between a state in which the heat medium flows from the cold machine path 15 to the battery path 14 and a state in which the heat medium flows from the cold machine path 15 to the connection path 16. When the pump 53 is operated in a state where the three-way valve 49 is controlled to flow the heat medium from the cooler path 15 to the battery path 14, the heat medium circulates in the circulation flow path constituted by the cooler path 15 and the battery path 14. When the pump 53 is operated in a state where the three-way valve 49 is controlled to flow the heat medium from the cooler path 15 to the connection path 16, the heat medium circulates in the circulation flow path constituted by the cooler path 15, the connection path 16, the low-temperature radiator path 11, and the connection path 17.

A chiller 52 is provided in the chiller path 15. The cooler 52 is disposed downstream of the pump 53. The chiller 52 cools the heat medium in the chiller path 15 by heat exchange between the heat medium in the chiller path 15 and the heat medium in the second thermal circuit 20 (more specifically, in the chiller path 22 described below).

The battery path 14 is provided with a heater 50 and a battery 51. The battery 51 supplies dc power to the PCU 47. That is, the battery 51 supplies electric power to the motor built in the transaxle 43 via the PCU 47. The battery 51 is cooled by heat exchange with the heat medium in the battery path 14. The heater 50 is disposed upstream of the battery 51. The heater 50 is an electric heater, and heats the heat medium in the battery path 14.

The second thermal loop 20 has a chiller path 22, an evaporator path 24, and a condenser path 26. The downstream end of the condenser path 26 is connected to the upstream end of the chiller path 22 and the upstream end of the evaporator path 24 via a three-way valve 65. The upstream end of the condenser path 26 is connected to the downstream end of the chiller path 22 and the downstream end of the evaporator path 24. A compressor 66 is provided in the condenser path 26. The compressor 66 pressurizes the heat medium in the condenser path 26 and sends it downstream. The three-way valve 65 switches the flow path between a state in which the heat medium flows from the condenser path 26 to the cooler path 22 and a state in which the heat medium flows from the condenser path 26 to the evaporator path 24. When the compressor 66 is operated in a state where the three-way valve 65 is controlled to flow the heat medium from the condenser path 26 to the chiller path 22, the heat medium circulates in the circulation flow path constituted by the condenser path 26 and the chiller path 22. When the compressor 66 is operated in a state where the three-way valve 65 is controlled to flow the heat medium from the condenser path 26 to the evaporator path 24, the heat medium circulates in the circulation flow path constituted by the condenser path 26 and the evaporator path 24.

The condenser path 26 is provided with a condenser 67 and a modulator 68. A condenser 67 is disposed downstream of the compressor 66, and a modulator 68 is disposed downstream of the condenser 67. The heat medium sent from the compressor 66 is a high-temperature gas. Therefore, the heat medium, which is a high-temperature gas, flows into the condenser 67. The condenser 67 cools the heat medium in the condenser path 26 by heat exchange between the heat medium in the condenser path 26 and the heat medium in the third heat circuit 30 (more specifically, in the condenser path 32 described later). The heat medium in the condenser path 26 is condensed by being cooled in the condenser 67. Therefore, the heat medium passing through the condenser 67 is a low-temperature liquid. Therefore, the heat medium, which is a low-temperature liquid, flows into the modulator 68. The modulator 68 removes bubbles from the thermal medium as a liquid.

The chiller path 22 is provided with an expansion valve 61 and a chiller 52. A chiller 52 is provided downstream of the expansion valve 61. The heat medium (i.e., the heat medium that is a low-temperature liquid) having passed through the modulator 68 flows into the expansion valve 61. The heat medium is decompressed while passing through the expansion valve 61. Therefore, the low-pressure, low-temperature liquid heat medium flows into the chiller 52. The chiller 52 heats the heat medium in the chiller path 22 and cools the heat medium in the chiller path 15 by heat exchange between the heat medium in the chiller path 22 and the heat medium in the chiller path 15. In the chiller 52, the thermal medium in the chiller path 22 is evaporated by heating. Therefore, the heat medium in the chiller path 22 efficiently absorbs heat from the heat medium in the chiller path 15. This efficiently cools the heat medium in the chiller path 15. The heat medium (i.e., the heat medium that is a high-temperature gas) in the chiller path 22 having passed through the chiller 52 is pressurized by the compressor 66 and sent to the condenser 67.

The evaporator path 24 is provided with an expansion valve 64, an evaporator 63, and an EPR (evaporator pressure regulator) 62. An evaporator 63 is provided downstream of the expansion valve 64, and EPR62 is provided downstream of the evaporator 63. The heat medium (i.e., the heat medium that is a low-temperature liquid) having passed through the modulator 68 flows into the expansion valve 64. The heat medium is decompressed while passing through the expansion valve 64. Therefore, the low-pressure, low-temperature liquid heat medium flows into the evaporator 63. The evaporator 63 heats the heat medium in the evaporator path 24 by heat exchange with air in the vehicle interior, and cools the air in the vehicle interior. That is, the evaporator 63 performs cooling in the vehicle interior. In the evaporator 63, the heat medium is heated by heat exchange, and the heat medium is evaporated. Therefore, the heat medium efficiently absorbs heat from the air in the vehicle interior. This efficiently cools the air in the vehicle interior. The EPR62 controls the pressure in the evaporator 63 to be substantially constant by controlling the flow rate of the thermal medium in the evaporator path 24. The heat medium having passed through the EPR62 (i.e., the heat medium that is a high-temperature gas) is pressurized by the compressor 66 and sent to the condenser 67.

The third thermal loop 30 has a condenser path 32, a heater core path 34, and a high temperature radiator path 36. The downstream end of the condenser path 32 is connected to the upstream end of the heater core path 34 and the upstream end of the high temperature radiator path 36 via a three-way valve 73. An upstream end of the condenser path 32 is connected to a downstream end of the heater core path 34 and a downstream end of the high temperature radiator path 36. A pump 72 is provided in the condenser path 32. The pump 72 sends out the heat medium in the condenser path 32 to the downstream. The three-way valve 73 switches the flow path between a state in which the heat medium flows from the condenser path 32 to the heater core path 34 and a state in which the heat medium flows from the condenser path 32 to the high-temperature radiator path 36. When the pump 72 is operated in a state where the three-way valve 73 is controlled to flow the heat medium from the condenser path 32 to the heater core path 34, the heat medium circulates in the circulation flow path constituted by the condenser path 32 and the heater core path 34. When the pump 72 is operated in a state where the three-way valve 73 is controlled to flow the heat medium from the condenser path 32 to the high-temperature radiator path 36, the heat medium circulates in the circulation flow path constituted by the condenser path 32 and the high-temperature radiator path 36.

The condenser path 32 is provided with a condenser 67 and a heater 71. A condenser 67 is provided downstream of the pump 72, and a heater 71 is provided downstream of the condenser 67. The condenser 67 heats the heat medium in the condenser path 32 and cools the heat medium in the condenser path 26 by heat exchange between the heat medium in the condenser path 32 and the heat medium in the condenser path 26. The heater 71 is an electric heater, and heats the heat medium in the condenser path 32.

A heater core 74 is disposed in the heater core path 34. The heater core 74 heats the air in the vehicle compartment by heat exchange between the heat medium in the heater core path 34 and the air in the vehicle compartment. That is, heating in the vehicle interior is performed by the heater core 74.

The high temperature radiator path 36 is provided with a high temperature radiator 75. The high-temperature radiator 75 cools the heat medium in the high-temperature radiator path 36 by heat exchange between the heat medium in the high-temperature radiator path 36 and outside air.

The thermal management device 100 has a control device 80. The control device 80 controls various portions of the thermal management device 100.

Next, operations that can be executed by the control device 80 will be described. The control device 80 can perform a heating operation, a cooling operation, a battery cooling operation, and an electrical equipment cooling operation.

(heating action)

In the heating operation, the control device 80 controls the respective portions of the thermal management device 100 as shown in fig. 2. In the third heat circuit 30, the three-way valve 73 is controlled to flow the heat medium from the condenser path 32 to the heater core path 34, and the pump 72 is operated. Therefore, the heat medium circulates through the circulation flow path 102 constituted by the condenser path 32 and the heater core path 34. In the second thermal circuit 20, the three-way valve 65 is controlled to flow the heat medium from the condenser path 26 to the cooler path 22, and the compressor 66 is operated. Therefore, the heat medium circulates through the circulation flow path 104 formed by the condenser path 26 and the chiller path 22. In the first thermal circuit 10, the three-way valve 49 is controlled to flow the heat medium from the cooler path 15 to the connection path 16, and the pump 53 is operated. The pump 48 is stopped. Therefore, the heat medium circulates through the circulation flow path 106 constituted by the cooler path 15, the connection path 16, the low-temperature radiator path 11, and the connection path 17.

In the circulation flow path 106 in fig. 2, the low-temperature heat medium cooled by the chiller 52 flows into the low-temperature radiator 41. Therefore, the temperature of the heat medium flowing into the low temperature radiator 41 is lower than the temperature of the outside air. Therefore, the heat medium is heated in the low-temperature radiator 41. As a result, the high-temperature heat medium heated by the low-temperature radiator 41 flows into the cooler 52. In the chiller 52, the heat medium in the chiller path 15 (i.e., the circulation flow path 106) is cooled, and the heat medium in the chiller path 22 (i.e., the circulation flow path 104) is heated. Therefore, the high-temperature heat medium heated by the chiller 52 flows into the condenser 67 in the circulation flow path 104. In the condenser 67, the heat medium in the condenser path 26 (i.e., the circulation flow path 104) is cooled, and the heat medium in the condenser path 32 (i.e., the circulation flow path 102) is heated. Therefore, the high-temperature heat medium heated by the condenser 67 flows into the heater core 74 in the circulation flow path 102. The heater core 74 heats the air in the vehicle interior by heat exchange between the heat medium in the circulation flow path 102 and the air in the vehicle interior. The air heated by the heater core 74 is blown by a fan not shown. As described above, heating in the vehicle interior is performed. As is clear from the above description, heat is supplied to the heater core 74 via the heat medium in the circulation flow passage 104 (i.e., the heat medium in the second heat circuit 20). That is, in the heating operation, the heater core 74 heats the heat medium in the second heat circuit 20 as a heat source.

(refrigeration action)

In the cooling operation, the control device 80 controls the respective portions of the thermal management device 100 as shown in fig. 3. In the third heat circuit 30, the three-way valve 73 is controlled to flow the heat medium from the condenser path 32 to the high temperature radiator path 36, and the pump 72 is operated. Therefore, the heat medium circulates through the circulation flow path 108 formed by the condenser path 32 and the high-temperature radiator path 36. In the second heat circuit 20, the three-way valve 65 is controlled to flow the heat medium from the condenser path 26 to the evaporator path 24, and the compressor 66 is operated. Therefore, the heat medium circulates through the circulation flow path 110 formed by the condenser path 26 and the evaporator path 24. In the cooling operation, the first heat circuit 10 does not participate.

In the circulation flow path 108 of fig. 3, the high-temperature heat medium heated by the condenser 67 flows into the high-temperature radiator 75. Therefore, the temperature of the heat medium flowing into the high-temperature radiator 75 is higher than the temperature of the outside air. Therefore, the heat medium is cooled in the high-temperature radiator 75. As a result, the low-temperature heat medium cooled by the high-temperature radiator 75 flows into the condenser 67. In the condenser 67, the heat medium in the condenser path 32 (i.e., the circulation flow path 108) is heated, and the heat medium in the condenser path 26 (i.e., the circulation flow path 110) is cooled. Therefore, the low-temperature heat medium cooled by the condenser 67 flows into the evaporator 63 in the circulation flow path 110. The evaporator 63 cools the air in the vehicle interior by heat exchange between the heat medium in the circulation flow path 110 and the air in the vehicle interior. The air cooled by the evaporator 63 is blown by a fan not shown. As described above, cooling of the vehicle interior is performed.

(Cooling action of Battery)

When the temperature of the battery 51 rises to a temperature equal to or higher than the reference value, the battery cooling operation is executed. In the battery cooling operation, the control device 80 controls the respective parts of the thermal management device 100 as shown in fig. 4. In the third heat circuit 30, the three-way valve 73 and the pump 72 are controlled so that the heat medium circulates in the circulation flow path 108 constituted by the condenser path 32 and the high-temperature radiator path 36. In the second heat circuit 20, the three-way valve 65 and the compressor 66 are controlled so that the heat medium circulates in the circulation flow path 104 constituted by the condenser path 26 and the chiller path 22. In the first thermal circuit 10, the three-way valve 49 is controlled to flow the heat medium from the chiller path 15 to the battery path 14, and the pump 53 is operated. Therefore, the heat medium circulates through the circulation flow path 112 formed by the chiller path 15 and the battery path 14.

The circulation flow path 108 in fig. 4 operates in the same manner as in fig. 3 (i.e., the cooling operation). Therefore, the heat medium in the condenser path 26 (i.e., the circulation flow path 104) is cooled by the condenser 67. Therefore, the low-temperature heat medium cooled by the condenser 67 flows into the chiller 52 in the circulation flow path 104. In the chiller 52, the heat medium in the chiller path 22 (i.e., the circulation flow path 104) is heated, and the heat medium in the chiller path 15 (i.e., the circulation flow path 112) is cooled. Therefore, the low-temperature heat medium cooled by the chiller 52 flows into the battery path 14 in the circulation flow path 112, and the battery 51 is cooled. As described above, the battery 51 is cooled.

In the battery cooling operation, the heat medium may be caused to flow through the heater core path 34 instead of the high-temperature radiator path 36. In this case, the heat medium in the third thermal circuit 30 is cooled by the heater core 74, and the air in the vehicle interior is heated. In this operation, the battery 51 is cooled, and the heater core 74 heats using the exhaust heat of the battery 51.

(Cooling action of electric apparatus)

The electrical equipment cooling action is performed during the actions of SPU46, PCU47, and the motors built into transaxle 43. The electric equipment cooling operation may be executed when the temperature of any of the SPU46, PCU47, and the motor exceeds a reference value. In the electric device cooling operation, the control device 80 controls the respective parts of the thermal management device 100 as shown in fig. 5. In the electrical equipment cooling operation, the third thermal circuit 30 and the second thermal circuit 20 do not participate. In the first heat circuit 10, the three-way valve 42 is controlled to flow the heat medium from the electrical equipment path 13 to the low-temperature radiator path 11, and the pump 48 is operated. Therefore, the heat medium circulates through the circulation flow path 114 formed by the electrical equipment path 13 and the low-temperature radiator path 11. In the electrical equipment cooling operation, the oil pump 44 operates to circulate the oil in the oil circulation passage 18.

In the circulation flow path 114, the high-temperature heat medium heated by the SPU46, the PCU47, and the oil cooler 45 flows into the low-temperature radiator 41. Therefore, the temperature of the heat medium flowing into the low temperature radiator 41 is higher than the temperature of the outside air. Therefore, the heat medium in the low-temperature radiator path 11 (i.e., the circulation flow path 114) is cooled by the low-temperature radiator 41. Therefore, in circulation flow path 114, the low-temperature heat medium cooled by low-temperature radiator 41 flows into electric equipment path 13, and SPU46 and PCU47 are cooled. The oil cooler 45 cools the oil in the oil circulation path 18 by a low-temperature heat medium. As a result, the cooled oil is supplied to the motor built in the transaxle 43, and the motor is cooled. As described above, the electric equipment cooling operation for cooling the electric equipment (i.e., the SPU46, the PCU47, and the motor) is performed.

As described above, the circulation flow path 112 formed in the first heat circuit 10 during the battery cooling operation does not include the low-temperature radiator path 11. That is, the circulation flow path 112 bypasses the low-temperature radiator path 11. In addition, the circulation flow path 114 formed in the first thermal circuit 10 during the electrical equipment cooling operation does not include the chiller path 15. That is, the circulation flow path 114 bypasses the chiller path 15. Therefore, the circulation flow path 112 and the circulation flow path 114 do not interfere with each other, and the battery cooling operation and the electric equipment cooling operation can be independently performed. For example, the battery cooling operation can be performed without performing the electrical equipment cooling operation, the electrical equipment cooling operation can be performed without performing the battery cooling operation, and the battery cooling operation and the electrical equipment cooling operation can be performed simultaneously. Further, since the circulation flow path 112 bypasses the electrical equipment path 13 and the circulation flow path 114 bypasses the battery path 14, the circulation flow path 112 and the circulation flow path 114 can be completely separated.

The circulation flow path 106 formed in the first heat circuit 10 during the heating operation does not include the battery path 14 and the electrical equipment path 13. That is, the circulation flow path 106 bypasses the battery path 14 and the electrical equipment path 13. Therefore, the temperature of the heat medium in the circulation flow path 106 is prevented from being lowered by heat exchange with the device that is not involved in the heating operation during the heating operation. This enables the heating operation to be performed more efficiently.

The control device 80 may perform operations other than the above operations. For example, the controller 80 can perform an operation of heating the battery 51 by heating the heat medium by the heater 50 while circulating the heat medium through the circulation flow path 112. This operation is performed when the temperature of the battery 51 becomes too low in a cold district or the like. The controller 80 can perform heating by the heater core 74 by heating the heat medium with the heater 71 while circulating the heat medium through the circulation flow path 102. When the heating operation cannot be performed, the operation is performed. Further, the controller 80 can perform an operation of suppressing a temperature rise in the SPU46, PCU47, and the motor by circulating the heat medium through the circulation flow path constituted by the electric equipment path 13 and the bypass path 12.

In the above embodiment, the flow paths in the first heat circuit 10 are switched by the two three-way valves 42 and 49. However, as in the modification shown in fig. 6 and 7, the first heat circuit 10 may have one five-way valve 55 instead of the three-way valves 42 and 49, and the flow path may be switched by the five-way valve 55. In fig. 6 and 7, the upstream end of the low-temperature radiator path 11, the upstream end of the bypass path 12, the downstream end of the electrical equipment path 13, the upstream end of the battery path 14, and the downstream end of the cold machine path 15 are connected to a five-way valve 55. The downstream end of low-temperature radiator path 11, the downstream end of bypass path 12, the upstream end of electrical equipment path 13, the downstream end of battery path 14, and the upstream end of chiller path 15 are connected via circulation groove 56. As shown in fig. 6, when the pump 53 is operated in a state where the five-way valve 55 is controlled to flow the heat medium from the cold machine path 15 to the battery path 14, the heat medium circulates in the circulation flow path 112. As shown in fig. 6, when the pump 48 is operated in a state where the five-way valve 55 is controlled to flow the heat medium from the electrical equipment path 13 to the low-temperature radiator path 11, the heat medium circulates in the circulation flow path 114. As shown in fig. 6, the heat medium can also be circulated through the circulation flow path 112 and the circulation flow path 114 at the same time. In addition, as shown in fig. 7, when the pump 53 is operated in a state where the five-way valve 55 is controlled to flow the heat medium from the cold machine path 15 to the low temperature radiator path 11, the heat medium circulates in the circulation flow path 106. When the pump 48 is operated in a state where the five-way valve 55 is controlled so that the heat medium flows from the electrical equipment path 13 to the bypass path 12, the heat medium circulates in the circulation flow path formed by the electrical equipment path 13 and the bypass path 12. In this way, in the heat management devices of fig. 6 and 7, the circulation flow path of the heat medium in the first heat circuit 10 can be switched substantially similarly to the heat management device 100 of fig. 1 to 5.

The correspondence between the components of the above-described embodiments and the components described in the patent claims will be described below. The heating core 74 of the embodiment is an example of a heater. The chiller 52 of the embodiment is an example of a heat exchanger. The SPU46, PCU47, and the motor built in the transaxle 43 of the embodiment are examples of electric devices. The low-temperature radiator 41 of the embodiment is an example of a radiator. The three-way valves 42, 49 of the embodiment are one example of at least one control valve. The five-way valve 55 of the modification is an example of at least one control valve. The heating operation according to the embodiment is an example of the first operation. The circulation flow path 106 of the embodiment is an example of the first circulation flow path. The battery cooling operation of the embodiment is an example of the second operation. The circulation flow path 112 of the embodiment is an example of the second circulation flow path. The electric device cooling operation according to the embodiment is an example of the third operation. The circulation flow path 114 of the embodiment is an example of the third circulation flow path. The condenser 67 of the embodiment is an example of a cooler.

The embodiments have been described in detail above, but these are merely examples and do not limit the patent claims. The techniques described in the patent claims include various modifications and changes to the specific examples described above. The technical elements described in the specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of application. In addition, the techniques illustrated in the present specification or the drawings achieve a plurality of objects at the same time, and achieving one of the objects has technical usefulness itself.