TWI803749B - Compound wick structure of vapor chamber - Google Patents

Abstract

The present invention provides a compound wick structure of a vapor chamber, which comprises a first plate and a second plate. The first plate has a first side and a second side. The second plate has a third side and a fourth side. The first plate and the second plate are assembled together to form a sealed chamber. The third side of the second plate is provided with a mesh or a fiber body; the third side has at least one heated zone having a first sintered-powder structure. The first sintered-powder structure is selected to be connected to or in contact with the mesh or the fiber body. A working liquid is disposed in the sealed chamber. By means of the arrangement of the compound wick structure, the vertical and horizontal flow-back efficiencies of the working liquid are enhanced and the efficiency of liquid-vapor cycle is increased.

Description

Vapor plate composite capillary structure

A compound capillary structure of a vapor chamber, especially a compound capillary structure of a vapor chamber that combines the properties of a grid body and a sintered powder or two-phase flow of other plural types of capillary structures.

The current vapor chamber is a heat transfer element through the principle of two-phase flow heat exchange, and is often used in large-area surface-to-surface heat conduction work, and because it has a large contact area, it is suitable for surface-to-surface The fast and uniform heat conduction is quite fast and uniform.

There is an airtight chamber inside the vapor chamber, and a capillary structure is set on the side of the airtight chamber that contacts the heat source for water absorption and return. At the same time, the airtight chamber is evacuated and filled with working liquid as a two-phase flow heat Used interchangeably, it is known that the capillary structure of the vapor chamber has better capillary force. Most of them use sintered powder to sinter on the surface of the airtight chamber through sintering. The powder structure after sintering has the characteristics of porosity and can generate capillary force. The condensed working liquid returns and absorbs in the heated evaporation area.

The working liquid in the heating area of the vapor chamber diffuses to the condensation area after being heated and evaporates, and then condenses into a liquid state. Then, the capillary structure formed by the sintered powder is absorbed and flowed back to the evaporation area through gravity dripping. The traditional capillary structure formed by the sintered powder is for The return effect of the working liquid in the horizontal direction is not good. If the overall area of the vapor chamber is set in a wide and long way, the return efficiency in the horizontal direction is not good, so how to make the vapor chamber vertically and horizontally uniform The rapid water return efficiency is what the industry needs to improve.

Therefore, in order to effectively solve the above-mentioned problems, the main purpose of the present invention is to provide a device that extracts the characteristics of multiple capillary structures and uses them in combination, so as to simultaneously possess the characteristics of vapor-liquid circulation of multiple types of capillary structures.

In order to achieve the above-mentioned purpose, the present invention provides a composite capillary structure of a vapor chamber, which comprises: a first plate body and a second plate body; the first plate body has a first side and a second side ; The second board has a third side and a fourth side, the first and second boards are correspondingly covered to form an airtight chamber, and a grid is attached to the third side of the second board Body or fiber body, and the third side has at least one heat receiving area, the heat receiving area is provided with a first sintered powder structure and is selected to form contact or connection with the aforementioned grid body or fiber body, and the airtight cavity is filled with a working fluid.

The present invention integrates the capillary characteristics of capillary structures such as mesh body or fiber body and sintered powder, and uses the characteristics of both to make up for the deficiency of the two, thereby improving the efficiency of the vapor-liquid circulation of the vapor chamber.

11: The first plate body

111: first side

112: second side

12: Second plate body

121: third side

122: Fourth side

2, 2': grid body, fiber body

1211: Heated area

1211a: first sintered powder structure

1211c: second sintered powder structure

13: Airtight chamber

14: Support structure

12a: concave part

3: working liquid

4: heat source

Figure 1a is an exploded perspective view of the first embodiment of the vapor chamber composite capillary structure of the present invention; Figure 1b is a perspective exploded view of the first embodiment of the vapor chamber composite capillary structure of the present invention; Figure 2 The figure is a combined sectional view of the first embodiment of the vapor chamber composite capillary structure of the present invention; the third figure is a combined sectional view of the second embodiment of the vapor chamber compound capillary structure of the present invention; the fourth figure is the present invention Combination sectional view of the third embodiment of the vapor chamber composite capillary structure of the invention; Fig. 5 is a composite sectional view of the fourth embodiment of the vapor chamber composite capillary structure of the present invention.

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

Please refer to Figures 1a, 1b, and 2, which are three-dimensional decomposition and assembly diagrams of the first embodiment of the vapor chamber composite capillary structure of the present invention. As shown in the figure, the vapor chamber composite capillary structure includes : a first plate body 11, a second plate body 12; the first plate body 11 has a first side 111 and a second side 112, and the first and second sides 111, 112 are respectively arranged on the second side A board body 11 has upper and lower sides.

The second plate body 12 has a third side 121 and a fourth side 122, the third and fourth sides 121, 122 are respectively arranged on the upper and lower sides of the second plate body 12, the first 2. The two plates 11, 12 are correspondingly covered to form an airtight chamber 13, the third side 121 of the second plate 12 is provided with a grid body 2, and the third side 121 has at least one heated area 1211, so The heat-receiving area 1211 has a first sintered powder structure 1211a, and is selected to be in contact with or connected to the aforementioned grid or fiber body 2, 2' (as shown in Figure 1b). This embodiment uses the first sintered powder structure 1211a Contact with the grid body 2 is used as an illustrative example, and it can also be partly contacted and partially connected, but it is not limited thereto, that is, the grid body or fiber body 2, 2' (as shown in Figure 1b) surrounds the The outer edge of the first sintered powder structure 1211a extends outward, and the airtight chamber 13 is filled with a working liquid 3 .

In this embodiment, the heat receiving area 1211 is selected to be located near the center of the second plate body 12 for illustration, and the first sintered powder structure 1211a of the heat receiving area 1211 is sintered to form a square shape.

The first and second plate bodies 11 and 12 are made of any one of copper, aluminum, stainless steel, ceramics, commercial pure titanium, titanium alloy, copper alloy, and aluminum alloy, and the first and second plate bodies 11 and 12 can be A combination of the same or different materials.

Please refer to Figure 3, which is a cross-sectional view of the second embodiment of the vapor chamber composite capillary structure of the present invention. As shown in the figure, this embodiment has the same structure as the first embodiment, so it will not be repeated here. To repeat, the difference between this embodiment and the aforementioned first embodiment is that there is a support structure 14 inside the airtight chamber 13, The support structure 14 is composed of any one of a plurality of solid columns, hollow rings, and powder sintered cylinders, and the two ends of the support structure 14 are respectively pressed against the second and third sides 112, 121, thereby increasing the temperature of the vapor chamber. The degree of support of the tight chamber 13 prevents collapse.

Please refer to Figure 4, which is a combined sectional view of the third embodiment of the vapor chamber composite capillary structure of the present invention. As shown in the figure, this embodiment has the same structure as the first embodiment, so it will not be repeated here. To repeat, the difference between this embodiment and the aforementioned first embodiment is that there is a second sintered powder structure 1211c at the center of the first sintered powder structure 1211a, and the porosity of the first sintered powder structure 1211a is greater than that of the second sintered powder structure 1211a. The sintered powder structure 1211c, whereby the water content of the heated area 1211 can be increased through the sintered powder with different porosity.

Please refer to Fig. 5, which is a combined cross-sectional view of the fourth embodiment of the vapor chamber composite capillary structure of the present invention. As shown in the figure, this embodiment has the same structure as the aforementioned first embodiment, so it will not be repeated here To repeat, the difference between this embodiment and the aforementioned first embodiment is that a concave portion 12a is formed in the heat receiving area at the center of the second plate body 12, and the concave portion 12a is defined by the third side 121 of the second plate body 12. Formed by protruding toward the fourth side 122, the first sintering powder 1211a is filled in the concave portion 12a (it can be flush or concave or protruding from the concave portion). In this embodiment, through the setting of the concave portion 12a, the first Protrusions are formed on the four sides 122 to be in contact with a heat source 4 to improve heat transfer efficiency in contact with the heat source 4 .

The above-mentioned embodiments of the present invention are used in conjunction with the grid body or fiber body and the sintered powder structure. The grid body or fiber body can reinforce the water return capacity of the uniform temperature plate in the horizontal direction, and at the same time, the sintered powder structure can improve the heating area. The water content avoids the situation of dry burning, and the combination of the composite capillary structure of the present invention further improves the conventional vapor-liquid circulation effect in the vertical direction and lacks the vapor-liquid circulation effect in the horizontal direction.

11: The first plate body

111: first side

112: second side

12: Second plate body

121: third side

122: Fourth side

2: Mesh body

1211: Heated area

1211a: first sintered powder structure

13: Airtight chamber

Claims (4)

A composite capillary structure of a vapor chamber, comprising: a first plate body with a first side and a second side; a second plate body with a third side and a fourth side, the first 2. The two plates are covered correspondingly to form an airtight chamber, a grid body is provided on the third side of the second plate, and the third side has at least one heated area, and the heated area has a first sintered powder structure, and the first sintered powder structure is surrounded by the mesh body, and the airtight chamber is filled with a working liquid. The composite capillary structure of the vapor chamber as described in item 1 of the claim, wherein there is a support structure in the airtight chamber, and the support structure is composed of any one of a plurality of solid columns, hollow rings, and powder sintered columns, and Two ends of the support structure are respectively against the second and third sides. The composite capillary structure of the vapor chamber as described in item 1 of the claim, wherein the center of the first sintered powder structure has a second sintered powder structure, and the porosity of the first sintered powder structure is greater than that of the second sintered powder structure powder structure. Vapor chamber composite capillary structure as described in Item 1 of the claim, wherein the first and second plate systems are any of copper, aluminum, stainless steel, ceramics, commercial pure titanium, titanium alloy, copper alloy, and aluminum alloy materials, and the first and second plates can be made of the same or different materials.

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