Heat transfer device

• US 7,246,655 B2
• Filed: 12/17/2004
• Issued: 07/24/2007
• Est. Priority Date: 12/17/2004
• Status: Expired due to Fees

• Current Assignee: Fujikura Limited
• Original Assignee: Fujikura Limited
• Inventors: Mochizuki, Masataka, Kaviany, Massoud, Takenaka, Eiji, Nguyen, Thang
• Primary Examiner(s): DUONG, THO V
• Application Number:
  US11/013,342
• Publication Number:
  US 20060131002A1
• Time in Patent Office: 949 Days
• Field of Search: 165/104.21, 165/104.26, 165/104.33, 361/699, 361/700, 174/15.2, 257/714, 257/715
• US Class Current: 165/104.26
• CPC Class Codes: F28D 15/046 characterised by the material or the construction of the capillary structure

Abstract

A heat transfer device including a sealed container, a base layer, formed on the bottom face of the container, and a wick is provided. The wick has a plurality of projections protruding upward from the base layer. A fluid is encapsulated in the container. The heat transfer device further includes a guide unit arranged on an inner face of the container, which guides the liquid to the wick.

Claims

1. A heat transfer device, comprising:

a sealed container;

a fluid, which evaporates when heated and which condenses when heat is removed therefrom, encapsulated in the sealed container;

a porous base layer disposed on an interior, bottom face of the container;

a wick comprising a plurality of projections protruding upwardly from the base layer; and

a guide unit, disposed on an interior face of the container, which guides fluid to the wick;

wherein;

the container comprises an interior upper face which is positioned above the plurality of projections of the wick;

the guide unit comprises a plurality of projections projecting downwardly from the interior upper face;

the fluid is guided by the guide unit and drips from the guide unit onto the plurality of projections of the wick;

the guide unit further comprises an inclined face disposed on the interior upper face; and

the plurality of projections of the guide unit are disposed substantially around the lowest portion of the inclined face.

2. The heat transfer device according to claim 1, wherein the plurality of projections of the guide unit comprises at least any one of:

a plurality of tapered projections, each having a pointed leading end and extending downwardly from the upper face of the container toward the plurality of projections of the wick, and

a plurality of column-shaped projections extending downwardly from the upper face of the container toward the plurality of projections of the wick.

3. The heat transfer device according to claim 1, wherein:

the inclined face of the guide unit is inclined downwardly thereby guiding the fluid to the plurality of projections of the wick.

4. The heat transfer device according to claim 1, wherein:

the guide unit comprises an inclined face formed at an interior bottom face of the container; and

the wick is disposed at the lowest part of the inclined face.

5. The heat transfer device according to claim 1, wherein:

the base layer has a porous structure comprising particles arranged as a flat plate; and

the plurality of projections of the wick comprise particles arranged into heaped structures.

6. The heat transfer device according to claim 1, wherein:

the wick is disposed at an interior portion of the container corresponding to an external portion of the container which is in connected with an exothermic body such that heat may be transferred between the exothermic body and the container.

7. A heat transfer device comprising:

a sealed container;

a fluid, which evaporates when heated and which condenses when heat is removed therefrom, encapsulated in the sealed container;

a porous base layer disposed on an interior, bottom face of the container;

a wick comprising a plurality of projections protruding upwardly form the base layer; and

a guide unit, disposed on an interior face of the container, which guides fluid to the wick;

wherein;

the container comprises an interior upper face which is positioned above the plurality of projections of the wick; and

the guide unit further comprises an inclined face and a plurality of projections disposed on the upper face, said inclined face being inclined downwardly toward said projections on the interior upper face thereby guiding the fluid to the plurality of projections of the wick.