Flat heat pipe with hook capillary tissue

Abstract

A flat heat pipe with hook capillary tissue includes a metal pipe, a capillary tissue and working fluid. The metal pipe is in a flat shape and formed by enclosing two opposite panels and two opposite sidewalls, and a hollow chamber is formed in the metal pipe. The capillary tissue is in the shape of a long strip, and includes having a hook formed at an end of the capillary tissue, and the capillary tissue is contained in the hollow chamber and attached onto one of the sidewalls and abutted between two sidewalls, and a working fluid is filled into the hollow chamber and adhered to the capillary tissue, so that the stability of fixing the capillary tissue into the metal pipe can be improved, and the retention quantity of the working fluid at an end of the pipe can be maintained.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a heat pipe, and more particularly to a flat heat pipe with a hook capillary tissue.[0003]2. Description of Prior Art[0004]As a central processing unit (CPU) of a computer comes with an increasingly higher speed, and electronic products tends to have a light, thin, short and compact design, a conventional heat dissipation device composed of an aluminum extrusion heat sink and a fan can no longer meet the user requirements anymore, and thus manufacturers keep developing new heat pipes with a higher thermal conduction efficiency and combining heat pipes with the heat sink to overcome present existing heat dissipation problems. However, the structural design of the interior of the heat pipe relates to flows of gas and liquid in the heat pipe and an available using space, and thus the inventor of the present invention focused on the aforementioned problem to design and develop a heat pipe to...

AI Technical Summary

Benefits of technology

[0008]Therefore, it is a primary objective of the present invention to provide a flat heat pipe with a hook capillary tissue, wherein a hook is provided for abutting the interior of the metal pipe to improve the stability of fixing the capillary tissue into the metal pipe.

[0011]The present invention has the effect of storing sufficient working fluid at the evaporation section of the heat pipe by means of the hook having the capillary tissue at the evaporation section, and overcomes the problem of having insufficient working fluid effectively.

Problems solved by technology

Although such heat pipe can perform a gas-liquid phase change with the heat produced by a heat source, yet the amount of capillary tissue installed onto a surface at the bottom wall of the pipe is reduced significantly due to the small gas passage in the pipe with an increasingly smaller size, and the internal surface of the capillary tissue is a rough surface which further constitutes an obstacle for the flow of the internal gas, and results in a poor efficiency of the thermal conduction of the heat pipe.

Furthermore, the capillary tissue is installed in the axial direction of the casing, and the capillary tissue at the evaporation section is restricted, and thus the supply of the working fluid is often insufficient and the conventional heat pipe requires further improvements.

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