Source: http://www.google.ca/patents/US6005772
Timestamp: 2013-12-13 08:50:21
Document Index: 325083387

Matched Legal Cases: ['arts 9', 'arts 9', 'arts 7', 'arts 9', 'arts 9', 'arts 9', 'arts 9']

Patent US6005772 - Cooling apparatus for high-temperature medium by boiling and condensing ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn a cooling apparatus, a radiating part mounted on a refrigerant tank is made by stacking refrigerant tubes and fins alternately. A first header and a second header are provided at the ends of the refrigerant tubes. When the cooling apparatus is used in a vertical attitude, the first header is positioned...http://www.google.ca/patents/US6005772?utm_source=gb-gplus-sharePatent US6005772 - Cooling apparatus for high-temperature medium by boiling and condensing refrigerantAdvanced Patent SearchPublication numberUS6005772 APublication typeGrantApplication numberUS 09/082,206Publication date21 Dec 1999Filing date20 May 1998Priority date20 May 1997Fee statusPaidPublication number082206, 09082206, US 6005772 A, US 6005772A, US-A-6005772, US6005772 A, US6005772AInventorsKiyoshi Kawaguchi, Kazuo Kobayashi, Hiroshi Tanaka, Tadayoshi TeraoOriginal AssigneeDenso CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (17), Referenced by (66), Classifications (21), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetCooling apparatus for high-temperature medium by boiling and condensing refrigerantUS 6005772 AAbstract In a cooling apparatus, a radiating part mounted on a refrigerant tank is made by stacking refrigerant tubes and fins alternately. A first header and a second header are provided at the ends of the refrigerant tubes. When the cooling apparatus is used in a vertical attitude, the first header is positioned above the liquid surface of refrigerant inside the refrigerant tank, and the second header is positioned below the liquid surface. Consequently, vapor refrigerant boiled by heat from a heat-emitting body attached to the refrigerant tank can flow through the first header into the refrigerant tubes, and liquid refrigerant liquefied in the refrigerant tubes can flow through the second header back to the refrigerant tank.
What is claimed is: 1. A cooling apparatus for cooling a heat-emitting body by means of heat transport effected by boiling and condensing refrigerant, comprising:a refrigerant tank containing liquid refrigerant; a condensing vessel having a refrigerant tube into which vapor refrigerant boiled by heat from the heat-emitting body flows, for condensing the vapor refrigerant flowing through said refrigerant tube; and a pair of connecting members connecting said refrigerant tank with said refrigerant tube, wherein said refrigerant tank and said refrigerant tube are extruded members each provided in a hollow shape having two open ends and are disposed substantially parallel and pointing in a same direction, said pair of connecting members consists of a connecting member to which one open end of said refrigerant tank and one open end of said refrigerant tube are both connected, and another connecting member to which the other open end of said refrigerant tank and the other open end of said refrigerant tube are both connected, and said connecting members are each made by joining together two press-formed components. 2. A cooling according to claim 1, wherein multiple refrigerant flow passages having small cross sectional areas are provided inside said refrigerant tank.
CROSS REFERENCE TO THE RELATED APPLICATIONS This application is based on and incorporates herein by reference Japanese Patent Application Nos. Hei 9-130020 filed on May 20, 1997, Hei 9-139540 filed on May 29, 1997, Hei 9-139570 filed on May 29, 1997, Hei 9-141238 filed on May 30, 1997, and Hei 9-141301 filed on May 30, 1997.
Another cooling apparatus is disclosed in JP-A-8-78589. This cooling apparatus has a refrigerant tank containing liquid refrigerant and a condensing vessel mounted on the top of this refrigerant tank, and the condensing vessel is mounted inclined at an angle of approximately 90 tubes and fins are disposed alternately, headers are connected to openings at the ends of the refrigerant tubes, and the refrigerant tubes are connected together through these headers.
However, in this related art apparatus, because the condensing vessel is mounted inclined at about 90 amount of heat produced by the heat-emitting body is large the size of the condensing vessel becomes large. In particular, when the height of the condensing vessel becomes great, it cannot be used to cool a heat-emitting body installed in a narrow space between boards like a computer chip or the like.
Also, in this related art apparatus, an upper end opening of the refrigerant tank is connected to one of the headers. Because it is inserted into this header from a direction 90 refrigerant tubes, the size of this header becomes large and the proportion of the heat-radiation area with respect to the size of the unit overall becomes small.
And, because the condensing vessel is mounted on the refrigerant tank inclined at about 90 problem that assembling it from one direction is difficult and the assemblability thereof is thus poor.
SUMMARY OF THE INVENTION It is therefore a first object of the present invention to provide a cooling apparatus which suffers little reduction in capacity even when used in an attitude such that its heat-emitting body mounting face is substantially vertical.
b) Electronic devices such as CPUs likely to constitute the heat-emitting body 3 generally are most frequently used in a horizontal or vertical (90 0 the cooling apparatus 1 is used in such an attitude that the bottom face of the refrigerant tank 2, to which the heat-emitting body 3 is fixed, is substantially vertical.
In the thirteenth embodiment, the collar members 5a are interposed between the adjacent refrigerant tubes 4 disposed in parallel sandwiching fins 8, and between the lowermost refrigerant tube 4 and the refrigerant tank 2. These collar members 5a connect together the adjacent orifice parts 9a of the refrigerant tubes 4, and the orifice parts 9a of the lowermost refrigerant tube 4 and the orifice parts 7a of the refrigerant tank 2. Therefore, if the height H of the collar members 5a is set to a height sufficient for gaps necessary for disposing the fins 8 to be obtained, it is not necessary for the end faces of the orifice parts 9a, 7a to be brought face to face (made to abut) with each other, and the heights of the orifice parts 9a, 7a can be made low. As a result, because the external diameters (connecting opening diameters) of the orifice parts 9a, 7a can be made small, it is possible to correspondingly increase the area over which the fins 8 are disposed and obtain a greater effective heat transfer area for the overall size of the radiating part. In particular, when the cooling apparatus 1 is used to cool a small heat-emitting body 3 such as a CPU, the size of the cooling apparatus 1 is about 70 mm mm, and because the fin area of the radiating part also becomes small, being able to increase the area over which the fins 8 are disposed by reducing the external diameters of the orifice parts 9a, 7a is effective in securing heat-radiating performance.
The heat-emitting body 3 is provided in a thin plate shape of for example 70 mm mounted on a central part of the bottom face of the refrigerant tank 2 with a heat-conducting member (for example thermal grease or sheet-form glass foil) therebetween, and is fixed by means such as screws or clips.
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