TWI727194B - Heat dissipation unit - Google Patents

Abstract

A heat dissipation unit includes a main body and a mesh body. The main body has an upper plate and a lower plate. The upper and lower plates are correspondingly overlapped and mated with each other to together define an airtight chamber. A working fluid is contained in the airtight chamber. One face of the lower plate, which faces the airtight chamber, is formed with a capillary structure by means of laser processing. The mesh body is attached to the face of the lower plate with the capillary structure. By means of the mesh body, the liquid working fluid backflow efficiency of the capillary structure can be enhanced and the water content of the internal evaporation section of the heat dissipation unit can be increased to avoid dry burn.

Description

Cooling unit

A type of heat dissipation unit, especially a capillary structure with plural kinds of capillary structure to improve the return water efficiency Cooling unit with high rate and moisture content.

The current uniform temperature plate or flat-plate heat pipe conducts heat conduction through the vacuum chamber with capillary structure and the working fluid through vapor-liquid circulation. The capillary structure has sintered powder, mesh body, groove, fiber body, etc., and the capillary structure has sintered powder, mesh body, groove, fiber body, etc. The capillary structure provides the working fluid to recirculate or adsorb the working fluid. Among them, the porous capillary structure made of sintered powder is the most commonly used and its capillary force is the best. However, some uniform temperature plates or flat heat pipes are due to special structure or process. It is impossible to use sintered powder or mesh and fibrous body as the capillary structure. Therefore, grooves are provided on the wall surface of the internal chamber of the uniform temperature plate or flat heat pipe as the capillary structure. Although the groove setting is simpler than other capillary structures, it is suitable for When the uniform temperature plate or flat-plate heat pipe is not placed horizontally, the internal working fluid cannot flow back through the groove due to the influence of gravity. Therefore, how to strengthen the lack of selection of the capillary structure is the most important goal of the current industry.

Therefore, in order to solve the shortcomings of the above-mentioned conventional technology, the main purpose of the present invention is to provide a heat dissipation unit that can reinforce the insufficient capillary force of the capillary structure in the heat dissipation unit.

To achieve the above objective, the present invention provides a heat dissipation unit, which includes: a body and a mesh body; the body has an upper plate and a lower plate, and the upper and lower plates are correspondingly stacked and jointly define an airtight chamber and Filled with a working fluid, the lower plate has a capillary structure formed by laser processing on one side of the airtight chamber; the grid system is attached to the side of the lower plate with the capillary structure.

The present invention further provides the capillary force that reinforces the capillary structure originally installed on the lower plate through the arrangement of the grid body, strengthens the water return force and improves the water content, thereby improving the efficiency of the vapor-liquid circulation inside the body.

1: Cooling unit

11: body

111: upper board

112: lower board

113: Airtight Chamber

1121: Capillary structure

1121a: groove

12: Mesh

2: working fluid

21: Vaporized working fluid

22: Liquid working fluid

Figure 1 is a perspective exploded view of the first embodiment of the heat dissipation unit of the present invention; Figure 2 is a three-dimensional combined cross-sectional view of the first embodiment of the heat dissipation unit of the present invention; Figure 3 is a perspective view of the second embodiment of the heat dissipation unit of the present invention Sectional view.

The above-mentioned objects and structural and functional characteristics of the present invention will be described based on the preferred embodiments of the accompanying drawings.

Please refer to Figures 1 and 2, which are the three-dimensional exploded and combined cross-sectional views of the first embodiment of the heat dissipation unit of the present invention. As shown in the figure, the present invention provides a heat dissipation unit 1, which includes: a body 11 and a mesh body 12 The body 11 has an upper plate 111 and a lower plate 112, the upper and lower plates 111, 112 correspondingly overlap and jointly define an airtight chamber 113 and filled with a working fluid 2, the lower plate 112 is relative to the airtight One side of the chamber 113 has a capillary structure 1121 formed by laser processing. The upper and lower plates 111, 112 are made of titanium or copper or aluminum or iron or fiber or plastic or titanium alloy or commercial pure titanium. Or ceramics of any different or the same material. In this embodiment, commercial pure titanium is used as an illustrative embodiment but not limited to it. The capillary structure 1121 is composed of a plurality of grooves 1121a, and the grooves 1121a Extend along the horizontal, transverse and longitudinal directions of the lower plate 112, and select either way of interlacing or non-interlacing. In this embodiment, interlacing is used as an illustrative embodiment, but it is not limited to it.

The mesh body 12 is attached to one side of the lower plate 112 with the capillary structure 1121, and the mesh body 12 is made of titanium or copper or aluminum or iron or fiber or plastic or titanium alloy or commercial pure titanium or Any of sintered powder In essence, this embodiment uses commercial pure titanium as an illustrative embodiment but is not limited to it. The mesh body 12 is combined with the lower plate 112 by welding or diffusion bonding.

Please refer to Figure 3, which is a combined cross-sectional view of the second embodiment of the heat dissipation unit of the present invention. As shown in the figure, this embodiment has the same partial structure as the aforementioned first embodiment, so it will not be repeated here, but this embodiment is different from The difference of the foregoing first embodiment is that the mesh bodies 12 can also be arranged in multiple layers and fixed in combination with the lower plate 112. The materials of the mesh bodies 12 can be a combination of the same or different materials. Mesh bodies 12 of different weaving densities are used as a combination.

In this case, multiple layers (capillary structure 1121 and mesh body 12) are combined with structures with capillary force effects, which can increase capillary force and thereby increase the water content in the evaporation area inside the heat dissipation unit and increase the return efficiency of the liquid working fluid. .

1: Cooling unit

11: body

111: upper board

112: lower board

113: airtight chamber

1121: Capillary structure

12: Mesh

2: working fluid

Claims (4)

A heat dissipation unit includes: a body with an upper plate and a lower plate, the upper and lower plates are correspondingly stacked and jointly define an airtight chamber and filled with a working fluid, the upper and lower plate systems are titanium or titanium Alloy or commercial pure titanium or ceramic, the lower plate has a capillary structure formed by laser processing on one side of the airtight chamber, and the capillary structure is composed of a plurality of grooves, The grooves extend along the horizontal and longitudinal directions of the lower plate, and choose either way of interlacing or non-interlacing; a grid body is attached to the side of the lower plate with the capillary structure, through the net The configuration of the grid further provides the capillary force that reinforces the capillary structure originally installed on the lower plate, strengthens the water return power and enhances the water content, thereby improving the efficiency of the vapor-liquid circulation inside the body. The heat dissipation unit described in the first item of the scope of patent application, wherein the grid system is any material of titanium, copper, aluminum, iron, fiber, plastic, titanium alloy, commercial pure titanium, or sintered powder. The heat dissipation unit described in the first item of the scope of patent application, wherein the mesh body is combined with the lower plate through welding or diffusion bonding. For the heat dissipation unit described in item 1 of the scope of patent application, the grids can also be a plurality of stacked layers and fixed with the bottom plate, and the grids can be a combination of the same material or different materials .

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