TW201333407A - Method for forming capillary structure of plate heat pipe and products thereof (II) - Google Patents

Abstract

A method for forming a capillary structure of a plate heat pipe and products thereof includes following steps: First, a plurality of fiber bundles are provided and paved to form a flake-shaped structure. Afterward, the fiber bundles are sintered to form a flake-shaped capillary structure. Afterward, the capillary structure is punched to form a plurality of hollowing portions for providing channels of flowing vaporization of the work fluid. Therefore, the flake-shaped capillary structure is conveniently placed into the plate heat pipe.

Description

Capillary forming method of sheet heat pipe and its finished product (2)

The invention relates to a heat conducting component and a manufacturing method thereof, in particular to a capillary structure forming method of a plate heat pipe and a finished product thereof (2).

Heat pipi is an environment in which an internal vacuum is applied to provide a working fluid injected into the interior to generate a vapor phase change due to heat, thereby transferring heat by steam; A heat conducting element that circulates in a liquid state and then circulates. In order to cope with the current thinned 3C heat-generating product, the conventional heat pipe having a round tubular shape must be flattened by a press-forming process to form a plate type heat pipe.

However, when the tube of the heat pipe is formed into a plate shape, the internal space thereof will also be flattened, so that the heat pipe is easily recessed due to the vacuum pressure in the process of degassing or vacuuming. The support structure must be built into the pipe body to prevent deformation of the pipe body. However, the thinned plate-shaped heat pipe has a limitation on the thickness of the necessary size. If the capillary structure and the support structure are parallel to the plate-shaped heat pipe, a certain space needs to be reserved for the flow passage after the working fluid is vaporized, so that after the totaling The size of the space cannot meet or exceed the size requirements of thin or ultra-thin, and thus there are many difficulties in the process to be solved.

In view of the above, the present inventors have made an effort to improve and solve the above-mentioned shortcomings, and have devoted themselves to research and cooperate with the application of the theory, and finally proposed a present invention which is reasonable in design and effective in improving the above-mentioned defects.

The main object of the present invention is to provide a capillary structure forming method for a plate-shaped heat pipe and a finished product thereof (2), which are sintered on a fiber bundle through a metal powder to form a sheet-like capillary structure on the capillary structure. The punched hole acts as a gas flow passage, so that it can be used not only as a support structure in the plate-shaped heat pipe, but also to achieve a thin or ultra-thin size requirement.

In order to achieve the above object, the present invention provides a capillary structure forming method (2) for a plate-shaped heat pipe, the steps of which are as follows:

a) providing a plurality of fiber bundles and laying them into a sheet;

b) sintering the fiber bundles to form a piece of capillary structure;

c) A depressed portion is formed on the capillary structure.

In order to achieve the above object, the present invention provides a capillary structure (2) of a plate-shaped heat pipe, which comprises a plurality of fiber bundles which are sintered and bonded into a sheet shape, and the capillary structure is provided with a concave shape. Part of the person.

In order to achieve the above object, the present invention provides a plate-shaped heat pipe (2) comprising a tube body and a capillary structure disposed in the tube body, wherein the tube body is hollow to form a slit-like accommodation space, The capillary structure is placed therein to abut against the inner wall of the accommodating space, and the capillary structure comprises a plurality of fiber bundles which are sintered to be bonded into a sheet shape, and are provided on the capillary structure Depressed parts.

The detailed description of the present invention and the accompanying drawings are to be understood by the accompanying claims .

The present invention provides a capillary structure forming method for a plate-shaped heat pipe and a finished product thereof (2), which is sintered on a fiber bundle by a metal powder to form a flaky capillary structure, and is further applicable to a thinned plate-shaped heat pipe. At the same time, it acts as a capillary structure and a support structure in the plate-shaped heat pipe. Please refer to step S1 of the first figure: firstly, the plurality of fiber bundles 1 are provided and laid into a sheet shape (that is, as shown in the second figure); the fiber bundles 1 can be according to the width and thickness of the desired capillary structure. They are laid and can be interlaced or placed with each other freely or randomly to create a multi-directional capillary action.

In the embodiment of the present invention, the step S2 of the first figure is further added after the step S1. As shown in the third figure, the metal powder 2 is infiltrated between the fiber bundles 1 and penetrated. The metal powder 2 penetrates between the fiber bundles 1 to increase the capillary force.

Next, as shown in step S3 of the first figure, the fiber bundles 1 infiltrated with the metal powder 2 are sintered to form a sheet-like capillary structure 3 (i.e., as shown in the fourth figure); The fiber bundles 1 have a gap therebetween, so that the metal powder 2 can be infiltrated, and after the sintering is completed, the metal powder 2 can be bonded to the fiber bundles 1, and the fiber bundles 1 are also sintered. The effect of the setting can be increased by the fact that the metal powder 2 is sintered in the gap between the fiber bundles 1 to increase the capillary force.

After that, as shown in step S4 of the first figure, a depressed portion is formed by cutting, pressing or punching on the above-mentioned sintered molded capillary structure 3, or further configured as a hollow shape. Or a plurality of holes 30 (i.e., as shown in FIG. 5), etc., as a flow passage through which the working fluid after vaporization in the heat pipe flows, so that a capillary structure 3 applicable to the plate-shaped heat pipe can be completed.

According to this, as shown in the fifth figure, when the fiber bundles 1 are formed by the sintering of the capillary structure 3, a flaky capillary structure can be formed to facilitate insertion into the tube body 4 of a plate-shaped heat pipe; The inside of the tubular body 4 is hollow, and a sulking space 40 is formed in the shape of a slit for the capillary structure 3 to be placed therein to abut against the inner wall of the accommodating space 40 (ie, as shown in FIG. 6). . The tube body 4 can be formed into a flat shape after being drawn by drawing, and one end of the tube body 4 can be sealed first to form a closed end 41, and the other end is left to be open for the above-mentioned capillary structure 3 to be inserted. And the sealing end 42 for performing operations such as degassing (that is, as shown in FIG. 7); and in the embodiment of the present invention, the sealing end 42 may include a tube 40 The shrinkable portion 420 formed in the contraction, a deaeration port 421 formed at the end of the constricted portion 420, and a sealing portion 422 filled in the deaeration port 421, and the deaeration port 421 is maintained before the operation such as degassing has been performed. The opening is not sealed by the sealing portion 422 to perform work such as degassing.

In addition, as shown in the eighth embodiment, it is a schematic perspective view of a plate-shaped heat pipe made by another embodiment of the present invention; wherein the capillary structure 3 can also make the depression when the process of punching the recessed portion is performed. The portion is one or a plurality of elongated and hollowed holes 30, and each of the holes 30 extends from the inside of the tubular body 40 near its closed end 41 to its sealing end 42 to communicate with the sealing end 42. In this way, when the plate-shaped heat pipe performs the degassing operation, the capillary structure 3 can not only provide sufficient support strength to avoid the tube body 4 from being recessed, but also can be used for degassing by using the elongated hole 30 as an air flow passage. The non-condensable gas can be discharged toward the sealing end 42 along the elongated hole 30 to further achieve the purpose of complete degassing.

Therefore, the capillary structure forming method of the plate-shaped heat pipe of the present invention and the finished product thereof (2) can be obtained by the above-mentioned structural composition.

In summary, the present invention can achieve the intended use purpose, and solve the lack of the conventional, and because of the novelty and progress, fully meet the requirements of the invention patent application, and apply according to the patent law, please check and The patent in this case is granted to protect the rights of the inventor.

However, the above description is only a preferred embodiment of the present invention, and thus the scope of the present invention is not limited thereto, and the equivalent techniques and means, etc., which are used in the description of the present invention and the contents of the drawings, are the same. It is included in the scope of the present invention and is combined with Chen Ming.

<present invention>

1. . . Fiber bundle

2. . . mineral powder

3. . . Capillary tissue

30. . . Hole

4. . . Tube body

40. . . Housing space

41. . . Closed end

42. . . Sealing end

420. . . Shrink tube

421. . . Air outlet

422. . . Sealing department

S1~S4. . . step

The first figure is a flow chart of the steps of the forming method of the present invention.

The second drawing is a schematic plan view of the present invention in which the fiber bundle is laid into a sheet shape.

The third figure is a schematic plan view of the present invention for sintering metal powder onto a fiber bundle.

The fourth figure is a cross-sectional view taken along line 4-4 of the third figure.

The fifth drawing is a schematic exploded view of the tube body of the sintered metal powder bundle and the plate-shaped heat pipe of the present invention.

Fig. 6 is a schematic cross-sectional view showing the fiber bundle in which the metal powder of the present invention is placed in a tube of a plate-shaped heat pipe.

The seventh drawing is a perspective view of a plate-shaped heat pipe made by the present invention.

Figure 8 is a perspective view of a plate-shaped heat pipe made in another embodiment of the present invention.

S1~S4. . . step

Claims (14)

A capillary structure forming method (2) for a plate-shaped heat pipe, the steps of which include:
a) providing a plurality of fiber bundles and laying them into a sheet;
b) sintering the fiber bundles to form a piece of capillary structure;
c) A depressed portion is formed on the capillary structure. The capillary structure forming method (2) of the plate-shaped heat pipe according to claim 1, wherein the step a) further infiltrates the metal powder between the fiber bundles. The capillary structure forming method (2) of the plate-shaped heat pipe according to claim 1 or 2, wherein the recessed portion in the step c) is one or a plurality of holes. The capillary structure forming method (2) of the plate-shaped heat pipe according to claim 3, wherein the depressed portion of the step c) is cut, pressed or punched. A capillary structure (2) of a plate-shaped heat pipe comprising a plurality of fiber bundles which are sintered and bonded into a sheet shape, and wherein the capillary structure is provided with a depressed portion. The capillary structure (2) of the plate-shaped heat pipe according to claim 5, wherein the fiber bundles are sintered with a metal powder. The capillary structure (2) of the plate-shaped heat pipe according to Item 5 or 6, wherein the depressed portion is one or a plurality of holes. The capillary structure (2) of the plate-shaped heat pipe according to Item 7 of the patent application, wherein the hole is elongated. A plate-shaped heat pipe (2) comprising a tube body and a capillary structure disposed in the tube body, the tube body being hollow to form a slit-like accommodation space for the capillary tissue to be placed therein The capillary structure is disposed to adhere to the inner wall of the accommodating space, and the capillary structure comprises a plurality of fiber bundles which are sintered and adhered into a sheet shape, and a concave portion is provided on the capillary structure. The slab-shaped heat pipe (2) according to claim 9, wherein the capillary structure is sintered with a metal powder between the fiber bundles. The slab-shaped heat pipe (2) according to claim 9 or 10, wherein the recessed portion is one or a plurality of holes. The slab-shaped heat pipe (2) according to claim 11, wherein the hole is elongated. The plate-shaped heat pipe (2) according to claim 12, wherein the pipe body has a closed end and a mouth end, and the hole extends from the closed end of the pipe body to the closed end thereof To communicate with the sealing end. The plate-shaped heat pipe (2) according to claim 13, wherein the sealing end further comprises a shrinkable tube portion formed by the tube body, a degassing port formed at an end of the shrink tube portion, and a The sealing portion is sealed on the gas removal port.