Groove type vapor chamber capillary backflow structure

Abstract

A capillary backflow structure of a groove type vapor chamber comprises a first plate, a second plate and a capillary structure, the first plate is provided with an inner surface, the second plate is sealed on the inner surface of the first plate, a cavity is formed between the second plate and the first plate, and the capillary structure covers the inner surface of the first plate; wherein at least one evaporation area and at least one condensation area are arranged in the cavity, at least one backflow path is arranged on the inner surface of the first plate, and the backflow path is composed of grooves and extends from one evaporation area to one condensation area in the cavity. Therefore, the condensation of the liquid working fluid can be improved through the backflow path formed by the grooves in a limited thickness space in the vapor chamber, and rapid backflow during heat exchange is facilitated.

Description

Technical Field

[0001] The present invention relates to a heat dissipation device, and more particularly to a capillary reflux structure of a grooved heat pipe. Background Art

[0002] Due to the highly developed computer industry today, the internal electronic heat-generating components or heat sources not only generate higher heat due to factors such as improved operation or performance, but also increase in quantity because each has its own processing part; for example, on today's computer motherboard, in addition to the central processing unit (CPU) that used to be its core, electronic heat sources or heat sources such as a graphics processing unit (GPU) are added in order to present higher picture quality.

[0003] However, today's heat dissipation devices such as heat pipes, in order to accelerate the change of the working fluid from vaporization back to liquid state, can make the liquid working fluid flow back quickly, so various capillary structures are added. However, under the limited space of various electronic products, the method of continuously adding different capillary structures will only increase the thickness of the heat pipe, and it is difficult to achieve the purpose of rapid reflux in a thinner space.

[0004] In view of this, the inventor of the present invention has devoted himself to research and combined with the application of theory in order to improve and solve the above-mentioned deficiencies, and finally proposed the present invention with reasonable design and effective improvement of the above-mentioned deficiencies. Summary of the Invention

[0005] The main purpose of the present invention is to provide a capillary reflux structure of a grooved heat pipe, which can establish a path for the liquid working fluid to flow back quickly between the evaporation area and the condensation area in the heat pipe within the limited thickness space, so as to effectively improve the reflux efficiency without increasing the thickness of the heat pipe.

[0006] To achieve the above object, the present invention provides a capillary reflux structure of a grooved heat pipe, including a first plate, a second plate and a capillary structure: the first plate has an inner surface, the second plate is sealed on the inner surface of the first plate and forms a chamber with the first plate, and the capillary structure covers the inner surface of the first plate; wherein, there is at least one evaporation area and at least one condensation area in the chamber, and at least one reflux path is provided on the inner surface of the first plate, and the reflux path is composed of grooves and extends from an evaporation area in the chamber to a condensation area. This can improve the condensation of the liquid working fluid and contribute to rapid reflux during heat exchange. Brief Description of the Drawings

[0007] Figure 1 It is a three-dimensional schematic diagram of the internal structure of the present invention.

[0008] Figure 2Schematic three-dimensional view of the reflux path provided on the first plate member in the present invention.

[0009] Figure 3 For Figure 2 detailed enlarged view of part A in

[0010] Figure 4 Schematic plan view of a usage state of the present invention.

[0011] Figure 5 Schematic plan view of another usage state of the present invention.

[0012] Figure 6 Schematic plan view of another usage state of the present invention.

[0013] Explanation of symbols in the drawings:

[0014] 1: First plate member;

[0015] 10: Inner surface;

[0016] 11: Reflux path;

[0017] 2: Second plate member;

[0018] 3: Capillary structure;

[0019] 4: Heat source;

[0020] 5: Fin;

[0021] A: Chamber;

[0022] H: Evaporation zone;

[0023] C: Condensation zone. Detailed implementation manners

[0024] In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the attached drawings are only for reference and illustration purposes and are not used to limit the present invention.

[0025] Please refer to Figure 1 , which is a schematic three-dimensional view of the internal structure of the present invention. The present invention provides a grooved heat pipe capillary reflux structure, including a first plate member 1, a second plate member 2 and a capillary structure 3; wherein:

[0026] The first plate member 1 can be made of a material with good thermal conductivity, such as copper or aluminum. As Figure 2As shown, the first plate member 1 has an inner surface 10, and the inner surface 10 can be formed by recessing inward from any surface of the first plate member 1. In this embodiment, the first plate member 1 is not limited to a simple geometric shape and can be changed to various shapes suitable for the application according to actual needs; similarly, the shapes of the first plate member 1 or the second plate member 2 cited in the present invention are not limited thereto either.

[0027] Please refer to Figure 1 again. As shown, the second plate member 2 can also be made of a material with good thermal conductivity, such as copper or aluminum. As Figure 5 shown, the second plate member 2 is stacked and hermetically joined toward the inner surface 10 of the first plate member 1, so as to form a chamber A between the first plate member 1 and the second plate member 2; the chamber A is in a vacuum state and is used to seal a working fluid (not shown). In this embodiment, the inner surface 10 of the first plate member 1 is recessed, so that when the second plate member 2 is stacked toward the inner surface 10 of the first plate member 1, the chamber A is formed between the first plate member 1 and the second plate member 2. In addition, the second plate member 2 is mainly determined according to the shape of the first plate member 1, but it is not limited thereto; if necessary, the second plate member 2 can also have a different geometric or combined shape from the first plate member 1.

[0028] As Figure 4 and Figure 5 shown, at least one evaporation zone H and at least one condensation zone C are provided in the chamber A. The evaporation zone H is used to correspond to at least one heat source 4, and the part of the first plate member 1 or the second plate member 2 corresponding to the evaporation zone H is in contact with the heat source 4; in the embodiment cited in the present invention, the first plate member 1 is in contact with the heat source 4, but it can also be changed to the second plate member 2 in contact with the heat source 4 (not shown). The condensation zone C is arranged away from the evaporation zone H, and fins 5 can be added on the part of the first plate member 1 or the second plate member 2 corresponding to the condensation zone C for heat dissipation; in the embodiment cited in the present invention, as Figure 5 shown, the fins 5 can be arranged on the part of the second plate member 2 corresponding to the condensation zone C, but it can also be as Figure 6 shown, the fins 5 can be arranged on the part of the first plate member 1 corresponding to the condensation zone C. Or fins 5 are provided on the parts of both the first plate member 1 and the second plate member 2 corresponding to the condensation zone C (not shown).

[0029] Please refer to Figures 2 to 4 again. As shown, the present invention mainly provides at least one reflux path 11 on the inner surface 10 of the first plate member 1. The reflux path 11 is formed by a groove, and the reflux path 11 formed by the groove extends from one evaporation zone H in the chamber A to one condensation zone C; further explanation is as follows: As Figure 3As shown, the foregoing groove can be formed by etching. For example, the reflux path 11 is formed by etching on the inner surface 10 of the first plate member 1. Therefore, the groove of the reflux path 11 is formed by recessing downward from the inner surface 10 to form a groove shape. In other words, the top edge of the groove of the reflux path 11 is lower than or flush with the inner surface 10 (as Figure 5 shown in the enlarged part). In addition, in the case of being applied to several evaporation zones H and several condensation zones C, the number of the reflux paths 11 can also be increased to several, and each reflux path 11 can be independent of each other, or can intersect or connect with each other.

[0030] Please refer to Figure 4 and Figure 5 shown. The capillary structure 3 is used to cover the inner surface 10 of the above-mentioned first plate member 1, and the capillary structure 3 can be a woven mesh or sintered powder. Wherein, when it is a woven mesh, it can be in a single-layer or multi-layer mesh structure stacked on the inner surface 10 of the first plate member 1 for contact, so that the above-mentioned reflux path 11 is covered under the capillary structure 3; and when it is sintered powder, the powder can be laid on the inner surface 10 and the reflux path 11 of the first plate member 1 before sintering, and after sintering, the powder is bonded to the inner surface 10 and the reflux path 11.

[0031] Therefore, through the above-mentioned structural composition, the capillary reflux structure of the groove type heat pipe of the present invention can be obtained.

[0032] Accordingly, as Figure 4 shown, through the reflux path 11 formed by the groove of the present invention, the flow route from the evaporation zone H to the condensation zone C can be effectively planned, so that when the working fluid vaporizes and returns to the liquid state, it can return from the condensation zone C to the evaporation zone H more quickly along the reflux path 11. At the same time, since the capillary structure 3 completely covers the inner surface 10 of the reflux path 11, the capillary force of the capillary structure 3 is also relatively large at the part where it overlaps with the reflux path 11. Therefore, when the liquid working fluid accumulated on the capillary structure 3 is heated, it immediately condenses toward the reflux path 11 and can directly flow along the reflux path 11 to the evaporation zone H for accumulation, which helps to be applied to an instantaneous sudden heat source 4.

[0033] The above are only the preferred and feasible embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Therefore, all equivalent technologies, means, etc. changes made by using the content of the specification and drawings of the present invention are all included in the scope of the present invention by the same reason, and are hereby stated.

Claims

1. A capillary reflux structure of a grooved heat pipe, characterized in that, Comprising: A first plate member having an inner surface; A second plate member sealed on the inner surface of the first plate member and forming a chamber therebetween; And A capillary structure covering the inner surface of the first plate member; Wherein, at least one evaporation zone and at least one condensation zone are provided in the chamber, and at least one reflux path is provided on the inner surface of the first plate member, and the reflux path is formed by a groove and extends from one evaporation zone in the chamber to one condensation zone.

2. The capillary reflux structure of the groove type heat pipe according to claim 1, characterized in that The first plate member is made of copper or aluminum.

3. The capillary reflux structure of the groove type heat pipe according to claim 1, characterized in that, The inner surface of the first plate member is formed by recessing inward from any surface of the first plate member.

4. The capillary reflux structure of the groove type heat pipe according to claim 1, wherein The second plate member is made of copper or aluminum.

5. The capillary reflux structure of the groove type heat pipe according to claim 1, wherein, The evaporation zone is used to correspond to at least one heat source, and the part of the first plate member or the second plate member corresponding to the evaporation zone is in contact with the heat source.

6. The capillary reflux structure of the grooved heat pipe according to claim 1 or 5, characterized in that, Fins are provided on the condensation zone, and the fins are provided on the part of the first plate member or the second plate member corresponding to the condensation zone.

7. The capillary reflux structure of the groove type heat pipe according to claim 1, wherein The groove of the reflux path is formed by etching.

8. The capillary reflux structure of the grooved heat pipe according to claim 1, characterized in that, The groove of the reflux path is formed by recessing downward from the inner surface.

9. The capillary reflux structure of the groove type heat pipe according to claim 1, wherein, The top edge of the groove of the reflux path is lower than or flush with the inner surface.

10. The capillary reflux structure of the groove type heat pipe according to claim 1, wherein There are a plurality of the reflux paths, and each of the reflux paths is independent of each other, or intersects or connects with each other.

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