TWM617116U - Heat pipe structure - Google Patents

Abstract

A heat pipe structure includes: an airtight chamber inside a body, at least one capillary structure is arranged on the wall of the airtight chamber and filled with a working fluid, the body has at least one stress concentration zone, the stress concentration zone The corresponding capillary structure is provided with a holding strengthening member for strengthening and fastening the capillary structure to the wall surface. The holding strengthening member is provided in the stress concentration area so that when the heat pipe is flexed and deformed, it can be strengthened by the holding The device prevents or avoids the capillary structure arranged in the stress concentration area from being cracked, damaged or destroyed.

Description

Heat pipe structure

A heat pipe structure, especially a heat pipe structure that can prevent the heat pipe from being flexed and deformed, and still ensure that the internal capillary structure is not damaged by cracking.

The heat pipe system is a common heat transfer element, which is often used in electronic equipment or hand-held devices that require surface-to-surface heat conduction. The heat pipe has an airtight chamber and is filled with a working fluid. Heat conduction is carried out through two-phase flow. The heat pipe belongs to the rapid heat conduction between point to point. Its advantage is that it can quickly transfer the heat generated by the heating source to the remote end and other heat dissipation elements for heat dissipation and heat conduction, preventing heat generation at the source Accumulated heat and other events happen.

As the applied electronic devices become lighter and thinner, the space in which electronic components and heat pipes can be installed is also reduced. Therefore, the heat pipe must be shaped (ie, flexed and deformed) in a limited space to fit the remaining space. , It is convenient to be installed inside the space and attached to the heat source for heat conduction.

When the heat pipe is manufactured, an empty tube is first provided, and a center rod with a diameter smaller than the inner tube diameter of the empty tube is inserted, and metal powder is filled between the center rod and the empty tube, and the metal powder is compacted. After sintering, the empty tube is filled with water, evacuated, and sealed. Some companies also open axial grooves on the wall of the empty tube or place a crimped grid in the empty tube. Used as a capillary structure, the above three capillary structures are common capillary structures inside the heat pipe. After the capillary structure is installed inside the air tube, the heat pipe is finally pressed into a flat shape into a flat heat pipe, so that it can be installed in a narrow space. .

However, when the formed heat pipe is subjected to flexural bending deformation operation, it is easy to happen that the internal capillary is damaged, such as the sintered powder body after sintering cracks and falls off at the flexural bend. When the heat pipe is flattened, the groove will be excessively deformed. For example, the groove will lose the original width of the groove or be excessively stretched to expand the original width of the groove, or the grid Any body detached from the wall will cause the heat pipe to lose capillary force.

Therefore, how to improve the internal capillary structure damage caused by the flattening or shaping of the heat pipe is the first goal for those who are familiar with the art.

Therefore, in order to effectively solve the above-mentioned problems, the main purpose of this creation is to provide a heat pipe structure that can prevent the internal capillary structure from being damaged and de-energized after the heat pipe is deformed due to bending and bending.

In order to achieve the above purpose, this creation provides a heat pipe structure, which includes: a body; inside the body is an airtight chamber, the wall of the airtight chamber is provided with at least one capillary structure and filled with a working fluid, the The body has at least one stress concentration area, and the capillary structure corresponding to the stress concentration area is provided with a holding strengthening member.

The heat pipe structure created by this invention can prevent the heat pipe from being flexed and bent and deformed after the heat pipe is fabricated, and the internal capillary structure of the heat pipe is deformed and damaged.

1: body

11: Airtight chamber

12: Capillary structure

13: Stress concentration area

2: working fluid

3: Holding reinforcement

Figure 1 is a cross-sectional view of the first embodiment of the heat pipe structure created; Figure 2 is a cross-sectional view of the second embodiment of the heat pipe structure created.

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

Please refer to Figure 1, which is a cross-sectional view of the first embodiment of the heat pipe structure of this creation. As shown in the figure, the heat pipe structure of this creation includes: a body 1; The body 1 can be a single body or an upper and lower plate body corresponding to the cover, wherein the body has an airtight chamber 11, and the wall of the airtight chamber 11 is provided with at least one capillary structure 12 and filled There is a working fluid 2, the body 1 has at least one stress concentration zone 13, and the capillary structure 12 corresponding to the stress concentration zone 13 is provided with a retaining reinforcement 3.

The stress concentration zone 13 of the main body 1 is mainly formed after the main body 1 is formed. In order to conform to the installed space or position, the main body 1 is flexed and deformed by applying an external force, including turning the main body 1 into a circular shape. Flatten into a flat shape. At this time, the stress concentration zone 13 will be located at the rounded corner of the intersection of the flat surface of the body 1 and the arc surface, or the excessively extended plane of the body 1, or the part where the body 1 is bent. The capillary structure 12 corresponding to the stress concentration area 13 is damaged due to stress concentration.

The body 1, the capillary structure 12, and the holding and strengthening member 3 are made of any material of copper, aluminum, stainless steel, titanium, titanium alloy, aluminum alloy or plastic, and the body 1, the capillary structure 12, and the holding and strengthening member 3 may be Any one of the same or different materials, and the working fluid 2 is any one of refrigerant, acetone, pure water, and alcohol.

The capillary structure 12 in this embodiment is a sintered powder body, a groove, a mesh body, and a fibrous body. The sintered powder is used as an illustrative embodiment in this embodiment, and it is not to be taken as a limitation. The holding strengthening member 3 The surface and/or inside of the capillary structure 12 (sintered powder) covered or embedded in the stress concentration zone 13 of the body 1, when the body 1 is pressed by an external force (flexed and bent) and deformed, the holding strengthening member 3 It is necessary to completely grasp the surface of the capillary structure 12 arranged in the stress concentration zone 13 to prevent the capillary structure 12 (sintered powder) from cracking and falling off, so that the internal capillary structure 12 is kept intact and the internal two-phase flow is maintained. Full operation.

Please refer to Figure 2, which is a cross-sectional view of the second embodiment of the heat pipe structure created. As shown in the figure, part of the structure of this embodiment is the same as that of the aforementioned first embodiment, so it will not be repeated here, but this embodiment is different from The difference of the foregoing first implementation is that the capillary structure 12 is a plurality of grooves, and the holding strengthening member 3 covers the surface of the capillary structure 12 bonded to the stress concentration zone 13 of the airtight chamber 11, and is strengthened by the holding Item 3 restricts the groove The groove width prevents excessive deformation (shrinkage or excessive expansion) of the internal capillary structure 12 (groove) when the body 1 is plastically deformed by an external force, and retains the capillary force of the capillary structure 12.

The capillary structure 12 is a plurality of grooves. The holding strengthening member 3 covers the surface of the stress concentration zone 13 combined with the airtight chamber 11, and the holding strengthening member 3 limits the width of the groove to prevent The grooves are excessively deformed. The combination of the capillary structure 12 and the holding strengthening member 3 in the foregoing first and second embodiments, except for the foregoing description, the holding and strengthening member 3 is provided on the surface of the capillary structure 12 by flat bonding. In addition, the holding strengthening member 3 is provided on the surface of the capillary structure 12 The member 3 can also be arranged inside the single-layer capillary structure 12 in the form of a skeleton, and the capillary structure 12 covers the holding strengthening member 3, or multiple layers of capillary structures 12 or multiple types of capillary structures 12 can be used for stacking. The retaining and strengthening member 3 is inserted or stacked in a layer to form a whole, or the retaining and strengthening member 3 is set on the surface of the airtight chamber 11 of the body 1, and then the capillary structure 12 is set through the above In this way, the capillary structure 12 is strengthened and fastened to the wall surface of the chamber by the retaining and strengthening member 3 to provide more stable strength and supportability, so as to prevent the capillary structure 12 from being damaged and brittle due to the stress concentration caused by the bending or twisting of the body 1 The capillary efficiency is reduced or disabled due to cracking.

In this case, when the body 1 is flexed and deformed, the internal capillary structure 12 at the position where the flexural deformation is prone to stress concentration is provided with a retaining reinforcement 3 for strengthening and reinforcement, and the body 1 is prone to stress concentration. Positions, bends, excessively extended or stretched positions, corners after extrusion, etc., for the body 1 itself to eliminate the stress concentration can be treated by leading or rounding the corners, and for the internal capillary structure 12 It cannot be arranged in this way. Therefore, the strength of the capillary structure 12 is enhanced by combining the retaining reinforcement 3 with the capillary structure 12 of the part, thereby improving the lack of conventional knowledge.

1: body

11: Airtight chamber

12: Capillary structure

13: Stress concentration area

2: working fluid

3: Holding reinforcement

Claims (5)

A heat pipe structure includes: a body with an airtight chamber inside, the wall of the airtight chamber is provided with at least one capillary structure and filled with a working fluid, the body has at least one stress concentration zone, the stress The capillary structure corresponding to the concentrated area is provided with a holding strengthening member. As for the heat pipe structure described in item 1 of the scope of the patent application, the stress concentration zone is set at one of the deformed part of the body, the second processed part after forming, or the flexurally deformed part. The heat pipe structure described in the first item of the patent application, wherein the capillary structure is a plurality of grooves, a sintered powder body, a mesh body, and the holding strengthening member is covered and bonded to the corresponding stress of the airtight chamber The surface of the capillary structure in the concentration area is either embedded or buried inside the capillary structure. As for the heat pipe structure described in item 1 of the scope of patent application, the body, capillary structure, and holding strengthening member are made of any of copper, aluminum, stainless steel, titanium, titanium alloy, and aluminum alloy, and the body and capillary structure , The holding strengthening member can be any of the same or different materials. In the heat pipe structure described in item 1 of the scope of patent application, the workflow system is any one of refrigerant, acetone, pure water, and alcohol.

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