Penetrating support structure and its production

Abstract

The inventive structural support is made of the braided wire or is made of sheet or block material to form a sheet-shaped concave-convex structure with several throughholes by punching, etching, electroplating or electroforming processes. The structural support is combined in the cavity of liquid-vapour two phases cooling assembly and is fit with a capillary structural layer.

Description

technical field [0001] The present invention relates to a penetrable supporting structure and a manufacturing method thereof, in particular to a liquid-vapor two-phase planar heat conduction element used for heat dissipation elements such as heat pipes, flat heat pipes, steam tank heat spreaders, and thin heat spreaders. The flexible support structure in the element has the dual effects of supporting and avoiding expansion and deformation, thereby facilitating the flow of working fluid and achieving high-efficiency heat uniformity or heat dissipation. Background technique [0002] With the increasing function speed of electronic products and the pursuit of light, thin and small volume, the heat dissipation problem of electronic products and components (such as computer CPU) is becoming more and more serious. In order to solve the heat dissipation problem, many passive heat dissipation and heat equalization components have been proposed as solutions to the heat dissipation pr...

AI Technical Summary

Problems solved by technology

[0004] Known patents related to the supporting structure of heat dissipation elements, such as Chinese Invention Patent Application No. 92128413 "Thin Plate Heat Pipe and Its Manufacturing Method", as shown in Fig. , 12 against each other to achieve the purpose of the support structure, the patent also mentions a solid straight groove support structure, as shown in Figure 2, a solid straight groove 21 is formed inside the housing 20 However, the two structures disclosed in the above-mentioned patents all have a common shortcoming, that is, the groove 12 and the solid straight groove 21 block the fluidity of the steam (vapor-phase working fluid), thereby affecting the heat dissipation efficiency

[0005] Another example is China's utility model patent application No. 93220197 "improvement of uniform temperature heat conduction structure", utility model patent application No. 93205027 "heat pipe", utility model patent application No. Application No. 86115415 "Heat Pipe Radiator", Utility Model Patent Application No. 88210055 "Heat Pipe Vapor" and other patents all propose a solid straight groove support structure similar to that shown in Figure 2, so The common disadvantage is that the solid straight groove support structure blocks the flow of steam (vapor-phase working fluid), thus affecting the heat dissipation efficiency

[0006] Another example is China's utility model patent application No. 87222042 "circular heat pipe flattened into flat heat pipe structure (1)", which proposes a section that can be a solid circle or a solid circle with grooves or a hollow circle, square or A square support structure with grooves, reticular capillary tissue or sintered capillary tissue is used to support and provide liquid capillary flow. Referring to Fig. The molds 20, 21 sandwich the pipe body 10 up and down to form a flat heat pipe structure. A serious disadvantage of this structure is that the support body 12 is attached to the capillary tissue 11 at a single point. As shown in the figure, the support body 12 There is no connection between the top of the top and the capillary tissue 11, so that the support body 12 only has a supporting function, and when it is placed in a high temperature environment (such as: an environment greater than 100° such as an oven or reflow welding), it is impossible to avoid the tube body 10 Expansion and deformation, in other words, since the top of the pipe body 10 does not have any containment structure, it is very easy to cause the top expansion and deformation

[0007] Another example is the Chinese Utility Model Patent Application No. 92217637 "Supporting Structure Improvement for Flat Heat Pipes". With reference to Fig. 4, the capillary structure and supporting structure 2 are made by metal powder sintering, and there is a channel 25 between it and the wall surface of the housing 1. It is used for the flow of working steam, and is engaged and fixed with the upper cover 10 and the lower cover 11 of the housing 1 in a sintered manner. Although the support structure 2 has a porous structure, it can provide the capillary conduction capacity of the liquid-phase working fluid, and The sintering and welding connection method of its upper and lower large contact surfaces can ensure its structural strength and deformation, so that the shortcomings of the above-mentioned known patents such as the impediment of steam (vapor-phase working fluid) and unfavorable expansion and deformation can be improved, but it still has some problems. Disadvantages: The support structure 2 made of metal powder sintering makes the flat heat pipe not flexible

[0009] In summary, traditional support structures can be broadly divided into three types: shell joint type, solid plate or columnar structure, and capillary structure. However, no matter what form, they cannot fully satisfy: it has a supporting effect and does not hinder the flow of working fluid. , can prevent expansion and deformation, has the advantages of flexibility, etc.

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