Compressed mesh wick, method for manufacturing same, and plate type heat pipe including compressed mesh wick

Abstract

A compressed mesh wick prepared by bending for plurality of times at least one sheet of band type mesh wire to form a prescribed shape, thus preparing a bent layered mesh body, and pressing the bent layered mesh body.

Description

[0001] 1. Field of the Invention[0002] The present invention relates to a plate type heat pipe for cooling various electronic components such as semiconductor chips or the like, a mesh wick used for a plate type heat pipe, and in particular, relates to a mesh wick comprising multiple mesh wire sheets, a method for manufacturing same, and a plate type heat pipe using same in which the container is light weighted, is not deformed by a vapor pressure of a working fluid, and has a low heat transfer resistance.[0003] 2. Description of the Related Art[0004] Electric or electronic parts such as semiconductor chips or the like generate heat to some extent, when used, which are mounted on various devices such as personal computers and electric or electronic devices such as power equipment. The function of the electric or electronic parts deteriorates and the life time thereof is shortened, when the electric or electronic parts are excessively heated. Lately, the electronic devices represente...

AI Technical Summary

Benefits of technology

[0019] To solve the above-mentioned problems in the conventional art, the present inventors have been studying hard. As a result, it has been found that when a compressed mesh wick is manufactured by winding a sheet of band type mesh wire around a metal plate, bar type body or cylindrical body as a core member to prepare a wound mesh body, then, removing the core member from thus prepared wound mesh body, and pressing the wound mesh body, it is possible to provide a compressed mesh wick comprising a pressed number of mesh wires placed in layers with little gap therebetween in the width direction, thus having excellent capillary action.

[0020] Furthermore, it has been found that when a compressed mesh wick is manufactured by bending a sheet of band type mesh wire in a corrugated form in place of winding the mesh wire to prepare a bent layered mesh body, and pressing the bent layered mesh body, it is possible to provide a compressed mesh wick comprising a pressed number of mesh wires placed in layers with little gap therebetween in the width direction, thus having excellent capillary action.

[0021] Furthermore, it has been found that when an opening portion is formed in the compressed mesh wick, then, the peripheral portions of the opening portion are bent (for example, squarely bent) to form a bent opened portion, then furthermore, a heat transfer block is placed in the bent opened portion, and the peripheral portions of the compressed mesh wick are press-attached to the side walls of the heat transfer block, it is possible to improve a capillary action of the compressed mesh wick, and to provide a plate type heat pipe light-weight and having a small heat transfer resistance.

Problems solved by technology

The function of the electric or electronic parts deteriorates and the life time thereof is shortened, when the electric or electronic parts are excessively heated.

Lately, the electronic devices represented by the personal computer or the like are remarkably downsized, and the development of the method for cooling the electric or electronic parts mounted in the electric devices becomes an important technical issue.

However, when the heat absorbing side is positioned above the heat dissipating side (this type is called as a "top heat mode"), the working fluid is not effectively circulated back to the heat absorbing side, thus the so-called dry out phenomenon often occurs.

However, the size of the computer or the like becomes remarkably smaller.

More specifically, since the mesh per se has no rigid body, it is difficult to fix the mesh wick placed in layers in both lengthwise and widthwise directions.

As a result, it is difficult to have the mesh wick contacted with the specific inner wall of the container, thus the mesh wick contacts with the various inner walls so as to deteriorate the function of the heat pipe.

When the gaps exist in the width direction of the mesh wick placed in layers, the capillary power is lowered so as to cause the heat resistance to rise, thus deteriorating the function of the heat pipe.

Accordingly, when the mesh wick is formed to be a prescribed shape, the end portion thereof is not sharply cut, thus the remaining fine wires at the end portion contact with various inner walls of the container, thus deteriorating the function of the heat pipe.

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