JP2002158321A - Cooling device for electric parts for vehicles - Google Patents

Abstract

(57) [Problem] To reduce the size of a cooling device for cooling electric components mounted on a vehicle. SOLUTION: Cooling which forms a flow path of cooling water in a drive system cooling system via a heat exchange member 16 is provided on a refrigerant tank 14 in which an evaporating heat of the evaporating cooling medium is charged and the electric component 30a is cooled. The water flow path 18 is arranged. In this case, the boiling cooling refrigerant vaporized in the refrigerant tank 14 can be cooled and liquefied by the cooling water in the cooling water passage 18. As a result, it is not necessary to separately provide a radiator for liquefying the boiling cooling refrigerant, and the entire apparatus can be downsized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cooling device,
More specifically, the present invention relates to a cooling device for cooling electric components mounted on a vehicle.

[0002]

2. Description of the Related Art Heretofore, as a cooling device for an electric part for a vehicle of this type, there has been proposed a cooling device having a refrigerant tank in which a refrigerant for boiling cooling is sealed (Japanese Patent Application Laid-Open No. 8-126125). In this cooling device, electric components for a vehicle are cooled by boiling cooling of a refrigerant, so that cooling can be more effectively performed by providing cooling fins or the like and cooling by air cooling.

[0003]

However, in this cooling device, it is necessary to separately provide a radiator for liquefying the vaporized refrigerant by air cooling, so that the size of the device is increased.

An object of the present invention is to reduce the size of the cooling device.

[0005]

Means for Solving the Problems and Their Functions and Effects The cooling device of the present invention employs the following means in order to achieve the above object.

A cooling device according to the present invention is a cooling device for cooling an electric component mounted on a vehicle, comprising a boiling cooling means for cooling the electric component by heat of vaporization of a first refrigerant, and a drive system for the vehicle. The gist of the invention is to provide a cooling unit for cooling the device with a second refrigerant, and a heat exchange unit for exchanging heat between the boiling cooling unit and the cooling unit.

In the cooling device of the present invention, heat exchange between the cooling means of the drive system equipment of the vehicle and the boiling cooling means can be performed by the heat exchange means, so that the cooling means of the drive system equipment cools the boiling cooling means. The vaporized first refrigerant can be liquefied. As a result, there is no need to provide a separate radiator,
The size of the device can be reduced.

In the cooling device of the present invention, the heat exchange means may be means for exchanging heat between the first refrigerant and the second refrigerant. In this case, the first refrigerant can be cooled by the second refrigerant.
In the cooling device according to the aspect of the present invention, the heat exchange unit is a unit formed as a corrugated plate or a plurality of fins in a refrigerant tank filled with the first refrigerant or a flow path of the second refrigerant. It can be. In this case, the efficiency of heat exchange can be improved.

In the cooling device according to the present invention, the heat exchange means may be provided immediately above the boiling cooling means. In this case, the vaporized first refrigerant that has moved above the boiling cooling means can be efficiently cooled.

[0010] The cooling device of the present invention includes a second electric component mounted on a vehicle, and a second heat exchanging means for exchanging heat between the second electric component and the cooling means. You can also. In this case, the cooling means can cool the boiling cooling means and also cool the second electric component.

In the cooling device according to the present invention, the drive system device may include an engine and a motor, and the cooling unit may be a unit for cooling the motor.

[0012]

Next, embodiments of the present invention will be described with reference to examples. FIG. 1 is a configuration diagram schematically illustrating a configuration of a cooling device 10 for an electric component according to an embodiment of the present invention. FIG. 2 illustrates a case where the cooling device 10 according to the embodiment is incorporated into a drive system cooling system of a vehicle. FIG.
As shown in FIG. 1, the cooling device 10 includes a heat sink 12 a provided on the electric component 30 a and formed as a plate material or a porous member having high heat conductivity, and a cooling device such as water or chlorofluorocarbon provided on the heat sink 12 a. A cooling system comprising a refrigerant tank 14 in which a cooling medium is sealed, and a heat exchange member 16 provided in the refrigerant tank 14 and made of a material having high thermal conductivity, and a drive system cooling system as shown in FIG. The cooling water flow path 18 which forms a part of the cooling water flow path is disposed.

The electric component 30a is an electric component mounted on a vehicle, for example, a component constituting an inverter, a DC-DC converter, and the like.

The refrigerant tank 14 cools the electric component 30a through the heat sink 12a by using the heat of vaporization of the refrigerant for boiling cooling. At this time, the vaporized cooling refrigerant for cooling moves upward in the refrigerant tank 14 as bubbles.

The heat exchange member 16 is formed as a corrugated plate directly on the upper part of the refrigerant tank 14 and exchanges heat between the refrigerant for boiling cooling of the refrigerant tank 14 and the cooling water in the cooling water passage 18. Since the heat exchange member 16 is provided directly on the refrigerant tank 14, heat exchange between the boiling cooling refrigerant and the cooling water can be efficiently performed.

As shown in FIG. 2, the cooling water flow path 18 circulates cooling water for cooling the motor 40, and a motor radiator 44 for cooling the cooling water by running wind or the like, and a water pump (for pumping the cooling water). (W / P) 46 is provided as a part of the cooling water flow path 50 for the motor, and the temperature of the cooling water flowing into the cooling water flow path 18 is maintained at about 70 ° C. or less. Therefore, the cooling water flow path 18 is
The vaporized boiling cooling refrigerant can be cooled by the cooling water and liquefied. Here, the temperature of the cooling water is
The temperature is also suitable for cooling to zero. If the electric component 30b mounted on the vehicle is provided in the cooling water channel 18 via the heat sink 12b made of a material having high thermal conductivity, the electric component 30b can also be cooled by the cooling water.

FIG. 2 shows a thermostat 62 for circulating engine cooling water for cooling the engine 60, adjusting the flow rate of the engine cooling water, and a radiator 64 for cooling the engine cooling water by running wind or the like. Are also shown in FIG. Here, the temperature of the engine cooling water pumped by the water pump (W / P) 66 is adjusted to 90 to 90 to be suitable for cooling the engine 60 by adjusting the thermostat 62 and the engine radiator 64.
It is kept at about 100 ° C.

The cooling device 10 according to the embodiment configured as described above.
In this case, since the vaporized boiling cooling refrigerant in the refrigerant tank 14 is cooled and liquefied by the cooling water in the cooling water channel 18, there is no need to separately provide a radiator for liquefying the vaporized boiling cooling refrigerant. As a result, the size of the entire apparatus can be reduced.
Further, since the cooling water flow path 18 is provided on the heat exchange member 16, it is possible to efficiently cool the boiling cooling refrigerant that has evaporated and moved upward in the refrigerant tank 14.

In the cooling device 10 of the present embodiment, the heat exchange member 16 is formed as a corrugated plate in the refrigerant tank 14.
It may be formed as a fin or a plate material, may be formed in the cooling water flow path 18 or may be provided as another member.

In the cooling device 10 of this embodiment, the cooling water passage 18 forms a part of the motor cooling water passage 50, but the cooling water passage 18 forms a part of the motor cooling water passage 50 shown in FIG. Or a part of a passage for circulating engine oil or a passage for circulating automatic transmission oil.

The embodiments of the present invention have been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various embodiments may be made without departing from the scope of the present invention. Of course, it can be carried out.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically illustrating a configuration of a cooling device 10 according to an embodiment.

FIG. 2 is an arrangement diagram showing an arrangement when the cooling device of the embodiment is incorporated into a drive system cooling system of a vehicle.

[Explanation of symbols]

10 cooling device, 14 refrigerant tank, 16 heat exchange member, 3
0a, 30b electric parts, 50 cooling water flow path for motor,
70 Cooling water channel for engine.

Claims (6)

[Claims] 1. A cooling device for cooling an electric component mounted on a vehicle, comprising: a cooling means for cooling the electric component by heat of vaporization of a first refrigerant; A cooling device comprising: cooling means for cooling with a refrigerant; heat exchange means for performing heat exchange between the boiling cooling means and the cooling means. 2. The cooling device according to claim 1, wherein said heat exchanging means is means for exchanging heat between said first refrigerant and said second refrigerant. 3. The heat exchange means according to claim 2, wherein the heat exchange means is formed as a corrugated plate or a plurality of fins in a refrigerant tank filled with the first refrigerant or a flow path of the second refrigerant. A cooling device as described. 4. The cooling device according to claim 1, wherein said heat exchange means is provided immediately above said boiling cooling means. 5. The cooling device according to claim 1, wherein heat is exchanged between the second electric component mounted on the vehicle and the second electric component and the cooling means. A cooling device comprising: a second heat exchange unit. 6. The cooling device according to claim 1, wherein the drive system device includes an engine and a motor, and the cooling unit is a unit that cools the motor.