JP2024000918A - temperature control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature control device with a simple mechanism capable of heating a battery by using an exhaust heat of an engine.

SOLUTION: A temperature control device of the present invention controls a first switch valve and a second switch valve so that heat is transmitted in order of an engine, a first heater core, a second heat core, the first switch valve, a first radiator, a second radiator, the second switch valve, a battery, where the first heater core and the second heater core, and the first radiator and the second radiator are each closely arranged in a first cooling water circuit into which the first heater core performing a heat exchange with a first cooling water collecting a heat discharge of the engine is provided, a second cooling water circuit into which the second heater core performing the heat exchange with a second cooling water collecting a heat from a heat source device, the first radiator, and the first switch valve are provided, and a third cooling water circuit into which the second radiator performing the heat exchange with a third cooling water collecting the heat from the battery, and the second switch valve are provided.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a temperature control device.

Patent Document 1 includes a heat exchanger for engine cooling water and battery cooling water, a flow path and a switching valve for supplying the cooling water to this heat exchanger, and supplies exhaust heat from the engine to the battery to recharge the battery. A technique for warming up is disclosed.

Japanese Patent Application Publication No. 2001-037009

However, in the technology disclosed in Patent Document 1, there is room for consideration of a simple mechanism for warming the battery using engine exhaust heat.

The present invention has been made in view of the above problems, and an object thereof is to provide a temperature control device that can heat a battery using engine exhaust heat with a simple mechanism. .

In order to solve the above-mentioned problems and achieve the objects, a temperature control device according to the present invention is a temperature control device that performs battery heating control using exhaust heat of an engine. a first cooling water circuit in which the first cooling water circulates, and a first cooling water circuit, in which the first cooling water circulates, is provided with a first heater core for heating the conditioned air by exchanging heat with the first cooling water that has been recovered; 2. A second heater core for exchanging heat with the second cooling water to warm the conditioned air, a first radiator for exchanging heat with the second cooling water, and a flow rate of the second cooling water to the first radiator. a second cooling water circuit in which the second cooling water circulates and is provided with a first switching valve for switching; a second radiator that exchanges heat with the third cooling water that recovers heat from the battery; a third cooling water circuit in which the third cooling water circulates, the third cooling water circuit is provided with a second switching valve that switches the flow rate of the third cooling water to the second radiator; The first radiator and the second radiator are arranged close to each other, the engine, the first heater core, the second heater core, the first switching valve, and the first radiator. , the first switching valve and the second switching valve are controlled so that heat is transferred to the second radiator, the second switching valve, and the battery in this order.

The temperature control device according to the present invention has the advantage of being able to heat a battery using engine exhaust heat with a simple mechanism.

FIG. 1 is a diagram showing a schematic configuration of a first cooling water circuit, a second cooling water circuit, a third cooling water circuit, and a refrigeration cycle, which are used for battery heating control by a temperature control device according to an embodiment. . FIG. 2 is a diagram showing a schematic configuration of the indoor air conditioning unit according to the embodiment. FIG. 3 is a diagram showing the flow of heat when performing battery heating control. FIG. 4 is a flowchart showing an example of battery heating control performed by the temperature control device. FIG. 5 is a flowchart showing another example of battery heating control performed by the temperature control device.

Embodiments of the temperature control device according to the present invention will be described below. Note that the present invention is not limited to this embodiment. The temperature control device according to the present invention is applied to, for example, a plug-in hybrid vehicle (PHEV) that runs using both an engine and an electric motor as driving power sources for driving.

FIG. 1 shows a schematic configuration of a first cooling water circuit 1, a second cooling water circuit 2, a third cooling water circuit 3, and a refrigeration cycle 4, which are used for battery heating control by a temperature control device 100 according to an embodiment. FIG.

The first cooling water circuit 1 is provided with cooling water passages 10a, 10b, an engine 11, a first heater core 12, and the like. The first heater core 12 is a heater core for engine exhaust heat heating, and is disposed inside a casing 54 of the indoor air conditioning unit 5, which will be described later. It is provided to heat the conditioned air (blow air) inside 54.

In the first coolant circuit 1, the engine 11 and the first heater core 12 are connected to the coolant passages 10a and 10b so that the first coolant for cooling the engine 11 can be circulated using an electric water pump (not shown) or the like. connected by.

The second cooling water circuit 2 is provided with cooling water passages 20a to 20f, a heat source device 21, a second heater core 22, a first heat exchanger 23, a first switching valve 24, a first radiator 25, and the like. Note that as the heat source device 21, for example, a heat pump system, an electric heater, or the like can be used. The second heater core 22 is a heater core for EV running heating, and is disposed inside a casing 54 of the indoor air conditioning unit 5, which will be described later. It is provided to heat the conditioned air inside 54. Further, the second heater core 22 is arranged close to the first heater core 12, and heat can be transferred between the first heater core 12 and the second heater core 22.

The cooling water passage 20a connects the heat source device 21 and the second heater core 22. Cooling water passage 20b connects second heater core 22 and first heat exchanger 23. The cooling water passage 20c connects the first heat exchanger 23 and the first switching valve 24. The cooling water passage 20d connects the first switching valve 24 and the heat source device 21. The cooling water passage 20e connects the first switching valve and the first radiator 25. The cooling water passage 20f connects the first radiator 25 and the first heat exchanger 23.

In the second cooling water circuit 2, an electric water pump (not shown) or the like is used to switch from the heat source device 21 to the second heater core 22, from the second heater core 22 to the first heat exchanger 23, and from the first heat exchanger 23 to the first switch. The second cooling water is circulated so as to flow from the valve 24 and the first switching valve 24 to the heat source device 21, from the first switching valve 24 to the first radiator 25, and from the first radiator 25 to the first heat exchanger 23. Note that the first switching valve 24 is a valve that can change between a closed state and an open state under the control of the temperature control device 100, and is a valve that allows the second switching valve 24 to flow to each of the heat source device 21 and the first radiator 25. Switch the flow rate of cooling water. For example, by closing the first switching valve 24 for one of the cooling water passage 20d and the cooling water passage 20e and opening the other, the first switching valve 24 can switch the second cooling water from the first switching valve 24 to the second cooling water passage. The object into which the heat flows is switched between the heat source device 21 and the first radiator 25.

The third cooling water circuit 3 is provided with cooling water passages 30a to 30g, a battery 31, a second heat exchanger 32, a second switching valve 33, a second radiator 34, a heating element 35, and the like. Note that examples of the heating element 35 include a drive motor that is a drive source for driving the vehicle, an inverter that converts electric power between the drive motor and the battery 31, and the like. The second radiator 34 is arranged close to the first radiator 25, and heat can be transferred between the first radiator 25 and the second radiator 34.

Cooling water passage 30a connects battery 31 and second heat exchanger 32. The cooling water passage 30b connects the second heat exchanger 32 and the second switching valve 33. The cooling water passage 30c connects the second switching valve 33 and the battery 31. The cooling water passage 30d connects the second switching valve 33 and the second radiator 34. The cooling water passage 30e connects the second radiator 34 and the second heat exchanger 32. The cooling water passage 30f connects the second radiator 34 and the heating element 35. The cooling water passage 30g connects the heating element 35 and the second switching valve 33.

In the third cooling water circuit 3, an electric water pump (not shown) or the like is used to connect the battery 31 to the second heat exchanger 32, from the second heat exchanger 32 to the second switching valve 33, and from the second switching valve 33. The third cooling water is circulated so as to flow to the battery 31 or the second radiator 34, from the second radiator 34 to the second heat exchanger 32 and the heating element 35, and from the heating element 35 to the second switching valve 33.

The second switching valve 33 is a valve that can change between a closed state and an open state under the control of the temperature control device 100, and the third cooling valve 33 is a valve that can change between a closed state and an open state under the control of the temperature control device 100. Switch the water flow rate. For example, the second switching valve 33 can switch the third cooling water from the second switching valve 33 by closing one of the cooling water passage 30c and the cooling water passage 30d and opening the other. The target of the flow is switched between the battery 31 and the second radiator 34.

In the refrigeration cycle 4, the second heat exchanger 32 and the compressor 41 are connected by a refrigerant passage 40a, the compressor 41 and the first heat exchanger 23 are connected by a refrigerant passage 40b, and the first heat exchanger 32 and the compressor 41 are connected by a refrigerant passage 40b. 23 and the second heat exchanger 32 are connected through a refrigerant passage 40c.

In the refrigeration cycle 4, the refrigerant is circulated so as to flow from the compressor 41 to the first heat exchanger 23, from the first heat exchanger 23 to the second heat exchanger 32, and from the second heat exchanger 32 to the compressor 41. let

Note that, in the first heat exchanger 23, heat exchange is performed between the second cooling water circulating in the second cooling water circuit 2 and the refrigerant circulating in the refrigeration cycle 4. Furthermore, in the second heat exchanger 32 , heat exchange is performed between the third cooling water circulating in the third cooling water circuit 3 and the refrigerant circulating in the refrigeration cycle 4 .

As a result, in the third cooling water circuit 3, the heat of the third cooling water received from the battery 31 is transferred to the refrigerant circulating in the refrigeration cycle 4 in the second heat exchanger 32, and is transferred to the refrigerant circulating in the refrigeration cycle 4 in the first heat exchanger 23. The second cooling water circulates through the second cooling water circuit 2. The second cooling water flows from the first heat exchanger 23 into the first radiator 25 via the first switching valve 24, and the heat of the second cooling water is released from the first radiator 25 to the outside air. Furthermore, in the third cooling water circuit 3, it is possible to form an inflow path through which the third cooling water flows from the battery 31 to the second radiator 34 via the second heat exchanger 32 and the second switching valve 33. There is.

FIG. 2 is a diagram showing a schematic configuration of the indoor air conditioning unit 5 according to the embodiment.

The indoor air conditioning unit 5 is provided to blow out temperature-adjusted conditioned air into the vehicle interior. The indoor air conditioning unit 5 includes a blower 51, an evaporator 52, an air mix damper 53, a first heater core 12, a second heater core 22, and a casing 54 that houses these. The indoor air conditioning unit 5 includes a first heater core 12 that constitutes an engine exhaust heat heating means that starts the engine 11 and uses the engine exhaust heat as a heating means, and a first heater core 12 that is used as a heating means to start the engine 11 and use the engine exhaust heat. A second heater core 22 constituting an EV running heating means using the heat of is arranged.

The casing 54 constitutes a passage for the conditioned air generated by the blower 51. An outside air inlet 55 is formed in the casing 54 at the upstream end in the flow direction of the conditioned air. The outside air inlet 55 is provided to introduce outside air (air outside the vehicle) into the inside of the casing 54 . A blower 51 is provided near the outside air inlet 55 .

An evaporator 52 is arranged downstream of the blower 51 in the flow direction of the conditioned air. An air mix damper 53 and a partition wall 56 are provided in the casing 54 on the downstream side of the evaporator 52. A heating passage 54a and a bypass passage 54b are formed within the casing 54 by this partition wall 56.

The first heater core 12 and the second heater core 22 are arranged in the heating passage 54a. Therefore, the conditioned air passing through the heating passage 54a is heated when the temperature of the cooling water of the first heater core 12 and the second heater core 22 is higher than the temperature of the conditioned air. The bypass passage 54b is provided so that the conditioned air can bypass the first heater core 12 and the second heater core 22. The air mix damper 53 is configured to adjust the temperature of the conditioned air supplied into the vehicle interior by adjusting the ratio of the amount of air passing through the heating passage 54a and the bypass passage 54b. Further, the casing 54 is formed with an outlet 57 at the downstream end in the flow direction of the conditioned air for blowing out the conditioned air into the vehicle interior.

In the indoor air conditioning unit 5, the first heater core 12 receives heat from the second heater core 22 if the temperature of the second heater core 22 is higher than a predetermined temperature (at least the temperature of the first heater core 12). For example, it is possible to adopt a configuration in which the first heater core 12 and the second heater core 22 are arranged close to each other with a gap in between, and the first heater core 12 receives heat from the second heater core 22 using air as a medium. Further, a configuration in which the first heater core 12 and the second heater core 22 are physically connected can also be adopted. Alternatively, a configuration may be adopted in which the first heater core 12 and the second heater core 22 are connected via a thermally conductive material.

The temperature control device 100 according to the embodiment controls the flow of the second cooling water in the second cooling water circuit 2 by switching the first switching valve 24 between the open state and the closed state, and controls the flow of the second cooling water in the second cooling water circuit 2 by switching the first switching valve 24 between the open state and the closed state. The flow of the third cooling water in the third cooling water circuit 3 is controlled by switching between the closed state and the closed state. As the temperature control device 100 according to the embodiment, for example, an electronic control unit (ECU) installed in a plug-in hybrid vehicle (PHEV) can be used.

FIG. 3 is a diagram showing the flow of heat when performing battery heating control.

The temperature control device 100 according to the embodiment includes an engine 11, a first heater core 12, a second heater core 22, a first heat exchanger 23, a first switching valve 24, and a first radiator 25, as shown by arrows in FIG. , the second radiator 34, the second heat exchanger 32, the second switching valve 33, and the battery 31 in this order. It is also possible to perform battery heating control that controls the second switching valve 33 and the like.

By performing battery heating control by the temperature control device 100 according to the embodiment, exhaust heat from the engine 11 can be supplied to the battery 31, and the battery 31 can be heated using the exhaust heat from the engine 11. Thereby, it is possible to reduce insufficient output of the battery 31 (deterioration of vehicle running performance), increase in resistance of the battery 31 (deterioration of power consumption), etc. that may occur due to the battery 31 being at a low temperature. In addition, the temperature control device 100 according to the embodiment uses a simple mechanism to control the engine temperature without additionally providing a heat exchanger, radiator, switching valve, etc. dedicated to battery heating control for each existing cooling water circuit. The battery 31 can be heated using the exhaust heat of the battery 31 .

FIG. 4 is a flowchart showing an example of battery heating control performed by the temperature control device 100. Note that the conditions for implementing the battery heating control are that the engine is operating and the battery temperature is below a preset threshold value. As the battery temperature, for example, a detection result detected by a temperature sensor provided in the battery 31 can be used.

First, the temperature control device 100 determines whether the engine is in operation (step S1). If the temperature control device 100 determines that the engine is not in operation (No in step S1), it ends the series of controls. On the other hand, if the temperature control device 100 determines that the engine is in operation (Yes in step S1), it determines whether the relationship of battery temperature<threshold value is satisfied (step S2). If the temperature control device 100 determines that the relationship of battery temperature<threshold value is not satisfied (No in step S2), it ends the series of controls. On the other hand, if the temperature control device 100 determines that the relationship of battery temperature<threshold value is satisfied (Yes in step S2), it performs battery heating control (step S3). Then, the temperature control device 100 ends the example control.

FIG. 5 is a flowchart showing another example of battery heating control performed by the temperature control device 100. Note that the conditions for implementing the battery heating control are that the engine is in operation, the battery temperature is below a preset threshold, and the air mix damper is in operation.

First, the temperature control device 100 determines whether the engine is in operation (step S11). If the temperature control device 100 determines that the engine is not in operation (No in step S11), it ends the series of controls. On the other hand, if the temperature control device 100 determines that the engine is in operation (Yes in step S11), it determines whether the relationship of battery temperature<threshold value is satisfied (step S12). If the temperature control device 100 determines that the relationship of battery temperature<threshold value is not satisfied (No in step S12), it ends the series of controls. On the other hand, if the temperature control device 100 determines that the relationship of battery temperature<threshold value is satisfied (Yes in step S12), it determines whether the air mix damper is in operation (step S13). If the temperature control device 100 determines that the air mix damper is not in operation (No in step S13), it ends the series of controls. On the other hand, if the temperature control device 100 determines that the air mix damper is in operation (Yes in step S13), it performs battery heating control (step S14). Then, the temperature control device 100 ends the example control.

As a result, when the air mix damper is operating, sufficient heat is supplied to the engine heater core for indoor air conditioning, and the battery can be heated under conditions that allow battery heating without reducing vehicle interior heating performance. can do.

1 First cooling water circuit, 2 Second cooling water circuit, 3 Third cooling water circuit, 11 Engine, 12 First heater core, 21 Heat source device, 22 Second heater core, 24 First switching valve, 25 First radiator, 31 battery, 33 second switching valve, 34 second radiator, 100 temperature control device.

Claims (1)

A temperature control device that performs battery heating control using engine exhaust heat,
a first cooling water circuit in which the first cooling water circulates, the first cooling water circuit being provided with a first heater core for heating the conditioned air by exchanging heat with the first cooling water that has recovered exhaust heat from the engine;
a second heater core for warming the conditioned air by exchanging heat with second cooling water that has recovered heat from the heat source device; a first radiator for exchanging heat with the second cooling water; and a first radiator. a second cooling water circuit in which the second cooling water circulates, the second cooling water circuit being provided with a first switching valve that switches the flow rate of the second cooling water;
The third radiator is provided with a second radiator that exchanges heat with the third cooling water that has recovered heat from the battery, and a second switching valve that switches the flow rate of the third cooling water to the second radiator. a third cooling water circuit in which cooling water circulates;
In,
the first heater core and the second heater core are arranged close to each other,
the first radiator and the second radiator are arranged close to each other,
the first heater core, the second heater core, the first switching valve, the first radiator, the second radiator, the second switching valve, and the battery so that heat is transferred in this order. A temperature control device that controls a first switching valve and a second switching valve.

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