Heat spreader with a liquid-vapor separation structure

Abstract

A heat spreader with a liquid-vapor separation structure includes a first panel, a second panel bonded with the first panel and defining therebetween an enclosed accommodation chamber, multiple spacer members arranged spaced apart from one another in the accommodation chamber and abutted between the first panel and the second panel and defining multiple vapor passages and liquid passages therebetween and dividing the accommodation chamber into a heat-absorbing zone and a condensing zone that are disposed in communication with each other through the vapor passages and the liquid passages, a first wick material partially disposed in the liquid passages and partially disposed in the heat-absorbing zone and the condensing zone, and a working fluid filled in the accommodation chamber.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention[0001]The present invention relates to cooling technology and more particularly, to a heat spreader with a liquid-vapor separation structure.2. Description of the Related Art[0002]With the continuous growing trend of global electronics industry market, many electronic products (such as LED light module, computers and mobile phones, etc . . . ) have become an indispensable part of people's lives. However, with continuous development of these electronic products, in order to achieve enhanced product performance, the product composition units are easy to produce large amounts of heat during operation. When these product composition units have a certain degree of waste heat accumulated therein, the working efficiency of these electronic products will be lowered, or the lifespan of these electronic products will be shortened. Therefore, most electronic products have heat pipes or heat spreaders (vapor chambers) mounted in their heat-gen...

AI Technical Summary

Benefits of technology

The present invention provides a heat spreader with a liquid-vapor separation structure that increases the mass flux of the working fluid in the vapor-liquid circulation system to achieve better heat dissipation performance. There are multiple vapor passages and at least one liquid passage arranged inside the heat spreader to separate the vapor and liquid phases of the working fluid. The heat spreader also has multiple spacer members arranged therein and abutted between at least one first panel and a second panel to form a strong support structure. This arrangement achieves better supporting effect compared to the prior art design. Overall, the invention improves heat dissipation performance and efficiency of the working fluid cycle.

Problems solved by technology

The flowing of the liquid phase and vapor phase of the working fluid in different directions may also cause a reduction in the mass flux during thermal cycling, further affecting the cooling effect.

Further, because the support projections of the aforesaid prior art heat transfer respectively consist of two solid semi-spheres of unequal radius and arranged spaced away from one another, if the heat spreader is mounted in a space that needs to bear a load or tends to be compressed, the stress point will be focused on the top side of the semi-spheres, thus, if the heat spreader is compressed, the pressure cannot be evenly distributed in all directions, leading to structural damage.

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