Heat pipe with a radial flow shunt design

Abstract

A heat pipe includes a pipe body filled up with a working fluid and having opposing evaporation segment and condensing segment, a first wick structure having ribs axially extending through the evaporation segment and the condensing segment, a channel defined between each two adjacent ribs and grooves transversely cut through the ribs, and a second wick structure sintered and joined to a predetermined part of the first wick structure in the evaporation segment to fill in the channels and the spiral grooves and to cover the ribs.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to heat pipes for transfer of heat between two solid interfaces and more particularly, to a heat pipe with a composite wick structure having a radial shunt design.[0003]2. Description of the Related Art[0004]For the advantages of small size, light weight, long lifespan, high thermal conductivity, long distance heat transfer and pressure-free heat transfer, heat pipe is intensively used in different fields for heat transfer and dissipation. A heat pipe combines the principles of both thermal conductivity and phase transition to efficiently manage the transfer of heat between two a hot side and a cold side. At the hot side of the heat pipe, a liquid in contact turns into a vapor by absorbing the heat of the surface of the hot side. The vapor condenses back into a liquid at the cold side, releasing the latent heat. The liquid then returns to the hot side through the wick structure where it eva...

AI Technical Summary

Benefits of technology

[0006]The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a heat sink, which has a second wick structure sintered at a first wick structure to increase the working fluid storage capacity and to enhance the working fluid flowing speed and phase cycling, avoiding dry burning and improving the fluid evaporation speed.

Problems solved by technology

However, regular composite wick structures are not designed for multi-heat-source application.

However, because the channels extend axially in a parallel manner, the working fluid cannot flow from one channel to another.

Thus, the working fluid in the channels opposite to the heat source or at each lateral side relative to the heat source cannot efficiently transfer heat subject to phase change.

Images