heat sink

Abstract

A heat dissipating device is provided to solve the problem of poor capillary effect of the existing uniform temperature plate. The heat dissipating device includes a housing having a chamber filled with a working fluid, and at least one metal mesh disposed in the chamber and having a plurality of first metal wires and a plurality of second metal wires interlaced to form a plurality of holes, each of the holes being formed by adjacent first metal wires and adjacent second metal wires, and the plurality of holes having at least two different sizes.

Description

Technical Field

[0001] This invention relates to a heat sink, and more particularly to a heat sink for dissipating heat from electronic components. Background Technology

[0002] In electronic products, existing heat spreaders are attached to the surface of a heat source. The heat spreader has a chamber filled with a working fluid. The working fluid can be heated by the heat source and vaporized. The gaseous working fluid evaporates to the side away from the heat source, releases heat, and then condenses. The condensed working fluid flows back to the side adjacent to the heat source to absorb heat again. This continuous circulation can carry away the heat from the heat source to achieve the purpose of heat dissipation.

[0003] Therefore, the evaporation and condensation efficiency of the working fluid plays a crucial role in the heat dissipation effect of the vapor chamber. Consequently, a capillary structure with numerous tiny pores is incorporated into the vapor chamber. This capillary structure utilizes capillary action to facilitate the rapid reflux and condensation of the evaporated working fluid, indirectly enhancing the heat dissipation effect of the vapor chamber. However, existing vapor chamber capillary structures form pores of uniform size, resulting in limited capillary effect, necessitating further improvement. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a heat sink in which at least one metal mesh has capillary structures with at least two different sizes of pores.

[0005] The directions or their approximate terms used throughout this invention, such as (front), (back), (left), (right), (top), (bottom), (inner), (outer), (side), etc., are mainly for reference to the directions in the accompanying drawings. Each direction or its approximate term is only used to assist in explaining and understanding the various embodiments of this invention, and is not intended to limit this invention.

[0006] The use of the quantifiers (a) or (an) for the elements and components described throughout this invention is for convenience of use and to provide the general meaning of the scope of the invention; in this invention, it should be interpreted as including one or at least one, and a single concept also includes plural cases, unless it clearly means otherwise.

[0007] The terms (combination), (assembly), or (integration) used throughout this invention mainly refer to the types of connections that allow for separation without damaging the components, or connections that make the components inseparable. These are options that can be selected by those with ordinary knowledge in the art based on the material of the components to be connected or the assembly requirements.

[0008] The heat sink of the present invention includes: a housing having a chamber filled with a working fluid; and at least one metal mesh disposed in the chamber having a plurality of first metal wires and a plurality of second metal wires interwoven to form a plurality of holes, each hole being formed by adjacent first metal wires and adjacent second metal wires surrounding each other, the plurality of holes having at least two different sizes.

[0009] Therefore, the heat sink of the present invention can form at least two different sizes of holes through the metal mesh. For example, the overlapping parts of the metal mesh can be deformed by stamping or rolling, and the overlapping parts can deform in different amounts due to uneven stress, so that the projection of the holes surrounded by the multiple overlapping parts presents an irregular shape and forms deformed holes of different sizes. Furthermore, the multiple first metal wires and / or the multiple second metal wires of the metal mesh can be arranged at at least two different spacings, or arranged side-by-side abutting each other. Therefore, the multiple holes formed by the multiple first metal wires and the multiple second metal wires can have at least two different sizes. Thus, relatively larger holes can provide vapor channels for the working fluid, while relatively smaller holes have better capillary force to adsorb the working fluid, which can give the working fluid a better flow rate and achieve the effect of increasing heat dissipation efficiency.

[0010] The housing may include a first piece and a second piece, the first piece and / or the second piece having a receiving groove that forms the chamber. Therefore, the housing is convenient to manufacture and assemble.

[0011] The plurality of first metal wires and the plurality of second metal wires can be interwoven to form multiple overlapping sections. These overlapping sections are formed by stamping or rolling, causing the projected holes around the overlapping sections to have irregular shapes and form deformed holes of different sizes. Therefore, it has the effect of forming multiple holes of at least two different sizes to provide vapor channels for the working fluid and to have better capillary force to adsorb the working fluid.

[0012] The at least one of the metal meshes may have overlapping portions that are not stamped or rolled. Therefore, the holes in the overlapping portions that are not stamped or rolled can have a relatively large size, which is effective in forming a vapor channel for the working fluid.

[0013] In this configuration, at least two adjacent first metal wires and / or at least two adjacent second metal wires form a group, thereby creating several groups of first metal wires and / or several groups of second metal wires. A first spacing exists between two adjacent first metal wires and / or two adjacent second metal wires within each group, and a second spacing exists between adjacent groups of first metal wires and / or several groups of second metal wires, the second spacing being greater than the first spacing. Therefore, the plurality of holes formed by the multiple metal wires can achieve at least two different sizes of functionality.

[0014] The plurality of first metal wire groups and the plurality of second metal wire groups are interwoven with multiple overlapping sections. These overlapping sections are formed by stamping or rolling, so that the projected holes around the overlapping sections have irregular shapes and form deformed holes of different sizes. Therefore, it has the function of forming multiple holes of at least two different sizes.

[0015] The first metal wire and / or the second metal wire can be twisted and wound in a spiral or braided in a twisted manner. Therefore, it can create tiny gaps between the multiple metal wires, thereby reducing the capillary pore density of the multiple metal meshes.

[0016] The metal mesh can be stacked in multiple layers. Therefore, the stacking of multiple metal meshes can form a capillary structure with deformable pores of various sizes, and reduce the pore density of the capillary structure of the multiple metal meshes.

[0017] In this configuration, the first metal wire and / or the second metal wire of one of the multiple phase-stacked metal meshes can be aligned with the openings in another metal mesh. Therefore, this increases the number of openings per unit area.

[0018] The mesh size of these multiple metal meshes can be different. Therefore, it is possible to increase the number of holes per unit area.

[0019] The multiple metal meshes can be stacked at different horizontal rotation angles. Therefore, non-traditional square or diamond-shaped pores can be formed to create a high-density, composite-shaped capillary effect.

[0020] The heat sink may further include at least one support member, which abuts against a surface of the at least one metal mesh between the inner wall of the housing. Therefore, it can prevent the housing from collapsing or deforming due to surface pressure or negative pressure from an internal vacuum.

[0021] The number of the at least one support member can be multiple, and these multiple support members are spaced apart and abut against the surface of the at least one metal mesh and the inner wall of the housing. Therefore, working fluid can flow through the gap between the two support members, so that the gas-liquid phase change can be carried out uniformly in the chamber, thereby further improving the gas-liquid phase change efficiency of the housing. Attached Figure Description

[0022] Figure 1 An exploded perspective view of a preferred embodiment of the present invention.

[0023] Figure 2 A perspective view of the first embodiment of the metal mesh of the present invention.

[0024] Figure 3 Figure 1 A magnified view of the local structure of A shown.

[0025] Figure 4 Top view of the second embodiment of the metal mesh of the present invention.

[0026] Figure 5 Top view of the third embodiment of the metal mesh of the present invention.

[0027] Figure 6 Top view of the fourth embodiment of the metal mesh of the present invention.

[0028] Figure 7 A perspective view of the fifth embodiment of the metal mesh of the present invention.

[0029] Figure 8 Top view of the sixth embodiment of the metal mesh of the present invention.

[0030] Figure 9 Top view of the seventh embodiment of the metal mesh of the present invention.

[0031] Figure 10 Top view of the eighth embodiment of the metal mesh of the present invention.

[0032] Figure 11 An exploded perspective view of the multiple metal mesh phases stacked according to the present invention.

[0033] Figure 12 Top view of multiple stacked metal mesh phases of the present invention.

[0034] Figure 13 The heat sink of the present invention has a perspective view of at least one support member.

[0035] Figure 14 Sectional view along line BB in Figure 13.

[0036] [Explanation of Labels in the Attached Image]

[0037] 1: Shell

[0038] 1a: First piece

[0039] 1b: Second piece

[0040] 11: Container

[0041] 12: Edge

[0042] 13: Confucian Channel

[0043] 14: Joint

[0044] 15:Sealing part

[0045] 2,2a,2b: Metal mesh

[0046] 21a: First metal wire

[0047] 21b: Second metal wire

[0048] 22: Hole

[0049] 22a, 22b: Deformed holes

[0050] 23: Overlapping areas

[0051] 3: Support components

[0052] S: Chamber

[0053] L: Working fluid

[0054] D1: First spacing

[0055] D2: Second spacing Detailed Implementation

[0056] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments of the present invention are described below in conjunction with the accompanying drawings; in addition, those symbols that are used in different drawings are considered to be the same and their descriptions will be omitted.

[0057] Please refer to Figure 1 As shown, it is a preferred embodiment of the heat dissipation component of the present invention, which includes a housing 1 and at least one metal mesh 2, wherein the at least one metal mesh 2 is placed in the housing 1.

[0058] Please refer to Figure 1 , 13As shown, the housing 1 can be made of thermally conductive materials such as copper, aluminum, titanium, or stainless steel. The housing 1 can be directly or indirectly connected to a heat source to dissipate heat. The heat source can be the central processing unit of a mobile phone or other electronic product, or an electronic component such as a chip on a circuit board that generates heat during operation. The shape of the housing 1 can be adjusted according to the type or installation position of the heat sink, and this invention is not limited thereto. The housing 1 has a chamber S filled with a working fluid L, which can be water, alcohol, or other liquids. The working fluid L can absorb heat from its liquid state and evaporate into a gaseous state, thereby achieving heat transfer through the gas-liquid phase change mechanism of the working fluid. The chamber S is in a vacuum-sealed state to prevent the loss of the working fluid L after it forms a gaseous state, thus avoiding any impact on heat dissipation efficiency.

[0059] In this embodiment, the housing 1 may include a first sheet 1a and a second sheet 1b. The first sheet 1a may have a groove 11, which can form the chamber S. The groove 11 may be formed by a processing method such as stamping, die casting, bending, or etching, and the present invention is not limited thereto. A ring edge 12 may be formed around the periphery of the groove 11, and a channel 13 may penetrate the ring edge 12 and communicate with the groove 11. The channel 13 can be used to extract air from the chamber S and to fill the chamber S with a working fluid L; the channel 13 can be sealed after the working fluid L is filled to prevent the working fluid L from dissipating after forming a gaseous state.

[0060] The second piece 1b can be made of the same or different material as the first piece 1a. The second piece 1b can be bonded to the first piece 1a by means of adhesive bonding or welding, for example, by hard soldering or laser welding the circumferential edge 12 of the first piece 1a to the second piece 1b. In this embodiment, the circumference of the second piece 1b may have a connecting portion 14, which can be combined with the circumferential edge 12 of the first piece 1a, so that the second piece 1b and the first piece 1a together form the chamber S. The second piece 1b also has a sealing portion 15, which can seal the hole 13 located in the first piece 1a with solder.

[0061] In other embodiments, the receiving groove 11 and the channel 13 may be formed on the second piece 1b and connected, and the sealing part 15 may be located on the first piece 1a to align the channel 13 and seal the channel 13 with solder; or, both the first piece 1a and the second piece 1b may have the receiving groove 11 and the connected channel 13, which may be covered by the two channels 13 and sealed with solder. These embodiments have the same function and effect, and are not limited by this invention.

[0062] Please refer to Figure 2As shown, this is a first embodiment of the metal mesh 2 of the present invention. The metal mesh 2 can be placed in the chamber S. The metal mesh 2 can be composed of multiple first metal wires 21a and multiple second metal wires 21b. The multiple first metal wires 21a and multiple second metal wires 21b can be made of ductile materials such as copper, aluminum, titanium, or stainless steel. The extension directions of the multiple first metal wires 21a and multiple second metal wires 21b can be perpendicular to each other or not perpendicular to each other. The multiple first metal wires 21a and multiple second metal wires 21b are interwoven to have multiple overlapping portions 23, and adjacent two first metal wires 21a and adjacent two second metal wires 21b surround to form a hole 22. Therefore, the multiple first metal wires 21a and multiple second metal wires 21b are interwoven into a mesh structure with multiple holes 22, so that the metal mesh 2 can serve as the capillary structure of the heat sink to improve the evaporation and capillary efficiency of the working fluid.

[0063] Please refer to Figure 3 As shown, the metal mesh 2 can be stamped or rolled by a mold, causing the overlapping portion 23 to deform. Depending on the degree of stamping or rolling, the deformed portion can be further flattened from the overlapping portion 23 and / or extended to each of the first metal wires 21a and / or each of the second metal wires 21b. Furthermore, the multiple first metal wires 21a and the multiple second metal wires 21b can deform to varying degrees due to uneven stress, resulting in irregular shapes and deformed holes 22a and 22b of different sizes projected around the holes 22. Therefore, forming relatively large deformed holes 22a can provide a vapor channel for the working fluid, while forming relatively small deformed holes 22b can provide better capillary force to adsorb the working fluid.

[0064] Please refer to Figure 4 As shown, this is a second embodiment of the metal mesh 2 of the present invention, which is substantially the same as the first embodiment described above. In this embodiment, the mold may have opposing concave and convex portions, and the concave and convex portions of the mold may have predetermined positions and shapes. Therefore, when the metal mesh 2 is stamped or rolled with the mold, the overlapping portion 23 located at the concave portion of the mold can be left unstamped or unrolled. As a result, the holes 22 enclosed by the unstamped or unrolled overlapping portion 23 will have a relatively larger size compared to the deformed holes 22a and 22b, in order to form a better vapor channel for the working fluid. Specifically, the overlapping portion 23 and holes 22 of each of the unstamped or unrolled first metal wires 21a and each of the unstamped second metal wires 21b are not deformed, so that the plurality of first metal wires 21a and the plurality of second metal wires 21b of the metal mesh 2 have the same shape as the concave portion of the mold (e.g., an approximate circle as shown in the figure).

[0065] Please refer to Figure 5, which shows the third embodiment of the metal mesh 2 of the present invention. This embodiment is largely the same as the second embodiment. In this embodiment, the overlapping portions 23 and holes 22 of each of the first metal wires 21a and each of the second metal wires 21b that have not been stamped or rolled are not deformed, so that the plurality of first metal wires 21a and the plurality of second metal wires 21b of the metal mesh 2 still maintain their existing elongated shape.

[0066] Please refer to Figure 6 As shown, this is the fourth embodiment of the metal mesh 2 of the present invention, which is substantially the same as the second embodiment described above. In this embodiment, the overlapping portions 23 and holes 22 of each of the first metal wires 21a and each of the second metal wires 21b that have not been stamped or rolled are not deformed, so that the plurality of first metal wires 21a and the plurality of second metal wires 21b of the metal mesh 2 still maintain their existing interlaced and connected strip shape.

[0067] Please refer to Figure 7 The diagram shows a fifth embodiment of the metal mesh 2 of the present invention. In this embodiment, the plurality of first metal wires 21a and / or the plurality of second metal wires 21b are arranged with at least two different spacings. Specifically, at least two adjacent first metal wires 21a are grouped together, and the plurality of first metal wires 21a can form several groups of first metal wires 21a. A first spacing D1 exists between the two adjacent first metal wires 21a in each group, and the plurality of first spacings D1 can be the same or different. A second spacing D2 exists between adjacent groups of first metal wires 21a, and the plurality of second spacings D2 can be the same or different. The second spacing D2 is preferably greater than the first spacing D1, and / or the plurality of second metal wires 21b... 1b can also be arranged with at least two spacings, namely, two adjacent second metal lines 21b form a group, so that the multiple second metal lines 21b form several groups of second metal lines 21b, and two adjacent second metal lines 21b in each group have a first spacing D1, which can be the same or different; the multiple groups of second metal lines 21b have a second spacing D2, which can be the same or different, and the second spacing D2 is preferably larger than the first spacing D1. Therefore, the multiple first metal lines 21a and the multiple second metal lines 21b can form multiple holes 22 of different sizes.

[0068] In another embodiment, at least one adjacent first metal wire 21a and / or at least one adjacent second metal wire 21b can be grounded side by side. When the two first metal wires 21a and / or the two second metal wires 21b abut against each other, a gap can also be formed between their arcuate circumferential surfaces. The gap formed by this gap can also generate capillary action for the working fluid. Based on this principle, in other embodiments, two or more first metal wires 21a and / or two or more second metal wires 21b can also be spirally twisted or braided, etc., and the present invention is not limited thereto.

[0069] Please refer to Figure 8 As shown, this is the sixth embodiment of the metal mesh 2 of the present invention. In this embodiment, the metal mesh 2 of the fifth embodiment can be further stamped or rolled by a mold, so that the plurality of first metal wires 21a and the plurality of second metal wires 21b (e.g., the overlapping portion 23) can be deformed. Therefore, the plurality of first metal wires 21a and the plurality of second metal wires 21b can form different amounts of deformation due to uneven force, so that the projection of the holes 22 surrounded by the plurality of first metal wires 21a and the plurality of second metal wires 21b presents an irregular shape and forms deformed holes 22a, 22b of different sizes. This can further make the holes 22 have different pore diameter variations, thereby enabling the working fluid to have better evaporation and capillary efficiency.

[0070] Please refer to Figure 9 As shown, this is the seventh embodiment of the metal mesh 2 of the present invention. In this embodiment, the metal mesh 2 can also be stamped or rolled using a mold. The mold can have opposing concave and convex portions, and the overlapping portion 23 located at the concave portion of the mold can be left unstamped or unrolled. Therefore, the overlapping portion 23 and the hole 22 of each of the first metal wires 21a and each of the second metal wires 21b that have not been stamped or rolled are not deformed, so that the metal mesh 2 has the same shape as the concave portion of the mold (for example, an approximate circle as shown in the figure).

[0071] Please refer to Figure 10 As shown, this is the eighth embodiment of the metal mesh 2 of the present invention. In this embodiment, the metal mesh 2 can also be stamped or rolled with a mold. The mold can have opposite concave and convex portions, so that the overlapping portions 23 and holes 22 of each of the first metal wires 21a and each of the second metal wires 21b that have not been stamped or rolled are not deformed, so that the multiple first metal wires 21a and the multiple second metal wires 21b of the metal mesh 2 still maintain their existing elongated shape.

[0072] Please refer to Figure 11 , 12As shown, the number of metal meshes 2 can be multiple and stacked. In this embodiment, the example is two metal meshes 2a and 2b. When the two metal meshes 2a and 2b are stacked, the first metal wire 21a and / or the second metal wire 21b of the upper (lower) metal mesh 2b can align with the holes 22 of the lower (upper) metal mesh 2a. Furthermore, the two metal meshes 2a and 2b can have the same mesh size or different mesh sizes, which is not limited by the present invention. In another embodiment, the two metal meshes 2a and 2b can also be stacked at different horizontal rotation angles. Therefore, after the multiple metal meshes 2 are stacked, a capillary structure with deformable holes 22a and 22b of various sizes can be formed, and the capillary structure pore density of the multiple metal meshes 2 can be reduced.

[0073] It is worth mentioning that the metal mesh 2 with the multiple overlapping portions 23 stamped or rolled as disclosed in the above embodiments, or the metal mesh 2 with the multiple first metal lines 21a and / or the multiple second metal lines 21b arranged with at least two spacings, can be applied to the form of multiple metal meshes 2 stacked together, and is not limited to the form disclosed in the figures of each embodiment.

[0074] Please refer to Figure 13 , 14 As shown, in another embodiment of the heat sink of the present invention, in addition to a housing 1 and at least one metal mesh 2, the heat sink may also include at least one support member 3. The at least one support member 3 may be located between a surface of the metal mesh 2 disclosed in the above embodiments and the inner wall of the housing 1, that is, the at least one support member 3 may be located between a surface of the metal mesh 2 disclosed in the above embodiments and the first sheet 1a or / and the second sheet 1b. The at least one support member 3 may be welded to the surface of the metal mesh 2. Alternatively, the at least one support member 3 may be formed by sintering metal powder onto a surface of the metal mesh 2; the present invention is not limited to this. Therefore, the at least one support member 3 can prevent the housing 1 from being subjected to surface pressure or negative pressure from internal vacuum, which could cause the surface of the first sheet 1a or / and the second sheet 1b to collapse or deform. Furthermore, there may be multiple at least one support member 3, which may be spaced apart and abut against a surface of the metal mesh 2 and the inner wall of the housing 1. Therefore, the working fluid L can flow through the gap between the two support members 3, which can reduce the obstruction of the working fluid L by the at least one support member 3, so that the gas-liquid phase change can be carried out uniformly in the chamber S, thereby further improving the efficiency of the gas-liquid phase change in the housing 1.

[0075] In summary, the heat sink of the present invention can form at least two different sizes of holes through the metal mesh. For example, the overlapping portions of the metal mesh can be deformed by stamping or rolling, and the overlapping portions can deform in different amounts due to uneven stress, so that the projection of the holes surrounded by the multiple overlapping portions presents an irregular shape and forms deformed holes of different sizes. Furthermore, the multiple first metal wires and / or the multiple second metal wires of the metal mesh can be arranged at at least two different spacings, or arranged side-by-side abutting each other. Therefore, the multiple holes formed by the multiple first metal wires and the multiple second metal wires can have at least two different sizes. Thus, relatively larger holes can provide vapor channels for the working fluid, while relatively smaller holes have better capillary force to adsorb the working fluid, which can give the working fluid a better flow rate and achieve the effect of increasing heat dissipation efficiency.

[0076] Although the present invention has been disclosed using the preferred embodiments described above, it is not intended to limit the invention. Any modifications and alterations made by those skilled in the art to the above embodiments without departing from the spirit and scope of the invention are still within the scope of protection of the present invention. Therefore, the scope of protection of the present invention includes all changes within the meaning and equivalent scope of the claims. Furthermore, when the above embodiments can be combined, the present invention includes any combination of embodiments.

Claims

1. A heat sink, comprising: A housing having a chamber filled with a working fluid; and At least one metal mesh is placed in the chamber, having multiple first metal wires and multiple second metal wires interwoven to form multiple holes. Each hole is formed by adjacent first metal wires and adjacent second metal wires surrounding each other. The multiple first metal wires and multiple second metal wires are interwoven to have multiple overlapping sections. These overlapping sections are formed by stamping or rolling to make the projected holes around the overlapping sections have irregular shapes and form deformed holes of different sizes. At least two adjacent first metal wires and / or at least two adjacent second metal wires form a group, such that the plurality of first metal wires and / or the plurality of second metal wires form several first metal wire groups and / or several second metal wire groups. There is a first gap between two adjacent first metal wires and / or two adjacent second metal wires in each group. There is a second gap between adjacent groups of first metal wires and / or groups of second metal wires. The second gap is greater than the first gap. Two or more first metal wires and / or two or more second metal wires are twisted and wound in a spiral or braided in a twisted manner.

2. The heat sink as described in claim 1, wherein, The housing includes a first piece and a second piece, the first piece and / or the second piece having a receiving groove that forms the chamber.

3. The heat sink as described in claim 1, wherein, The at least one metal mesh has overlapping portions that have not been stamped or rolled.

4. The heat sink as described in claim 1, wherein, The metal mesh consists of multiple stacked phases.

5. The heat sink as described in claim 4, wherein, The first metal wire and / or the second metal wire of one of the multiple phase-stacked metal meshes are located in the holes of another metal mesh.

6. The heat sink as described in claim 4, wherein, The mesh size of these multiple metal meshes is different.

7. The heat sink as described in claim 4, wherein, The multiple metal meshes are stacked on top of each other at different horizontal rotation angles.

8. The heat dissipation member as claimed in any one of claims 1 to 7, further comprising at least one support member abutting between a surface of the at least one metal mesh and the inner wall of the housing.

9. The heat sink as described in claim 8, wherein, The number of the at least one support member is multiple, and the multiple support members are spaced apart and abut against the surface of the at least one metal mesh and the inner wall of the housing.

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