# US 2014/0190203 A1 · Cooling system

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- Number: US 2014/0190203 A1
- Document ID: US20140190203A1
- Status: Published application
- Kind: A1
- Application number: 14/234,510
- Filed: 2012-07-24
- Published: 2014-07-10
- Earliest claimed: 2011-07-26
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Inventors: Yuki Jojima; Yoshiaki Kawakami; Eizo Takahashi; Kousuke Sato; Kazuhide Uchida; Yuichi Ohno
- Web page: https://patentgrep.com/patent/US20140190203A1

## CPC

- F25B 1/005: {of the single unit type (F25B1/10 takes precedence)}
- B60H 1/00278: {for the battery}
- B60H 1/143: {the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries}
- B60H 2001/00307: {Component temperature regulation using a liquid flow}
- B60H 2001/3288: {Additional heat source}
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES

## Abstract

A cooling system that cools a heat generating source mounted on a vehicle includes: a compressor that circulates refrigerant; a first heat exchanger that performs heat exchange between the refrigerant and outside air; a decompressor that decompresses the refrigerant; a second heat exchanger that performs heat exchange between the refrigerant and air-conditioning air; and a cooling device that is provided on a path of the refrigerant flowing between the first heat exchanger and the decompressor and that uses the refrigerant to cool the heat generating source. A capillarity generating portion that causes the refrigerant to rise due to capillarity is provided inside the cooling device.

## Claims

### Claim 1

A cooling system configured to cool a heat generating source mounted on a vehicle, comprising:
a compressor configured to circulate refrigerant;
a first heat exchanger configured to perform heat exchange between the refrigerant and outside air;
a decompressor configured to decompress the refrigerant;
a second heat exchanger configured to perform heat exchange between the refrigerant and air-conditioning air; and
a cooling device configured to be provided on a path of the refrigerant flowing between the first heat exchanger and the decompressor and configured to use the refrigerant to cool the heat generating source, the cooling device including a capillarity generating portion that causes the refrigerant to rise due to capillarity.

### Claim 2 (depends on 1)

The cooling system according to claim 1, wherein the capillarity generating portion is configured to be formed by subjecting an inner face of a bottom portion of the cooling device to surface processing.

### Claim 3 (depends on 2)

The cooling system according to claim 2, wherein the inner face of the bottom portion of the cooling device has a plurality of grooves.

### Claim 4 (depends on 1)

The cooling system according to claim 1, wherein the capillarity generating portion extends in a flow direction of the refrigerant flowing through the cooling device.

### Claim 5 (depends on 1)

The cooling system according to claim 1, wherein the heat generating source is in thermal contact with an outer face of a bottom portion of the cooling device.

### Claim 6 (depends on 5)

The cooling system according to claim 5, wherein the heat generating source is directly in contact with the outer face of the bottom portion of the cooling device or is in contact with the outer face via a heat pipe.

### Claim 7 (depends on 1)

The cooling system according to claim 1, further comprising:
a first line through which the refrigerant flows between the compressor and the first heat exchanger;
a second line through which the refrigerant flows between the cooling device and the decompressor; and
a communication line configured to provide fluid communication between the first line and the second line.

### Claim 8 (depends on 7)

The cooling system according to claim 7, further comprising:
a third line through which the refrigerant flows between the decompressor and the second heat exchanger; and
a fourth line through which the refrigerant flows between the second heat exchanger and the compressor.