High-power 2D hybrid braided copper mesh capillary structure and application thereof

Abstract

The invention relates to the technical field of heat dissipation product capillary structures, in particular to a high-power 2D hybrid woven copper mesh capillary structure, which is characterized in that warps are arranged in the warp direction, wefts are arranged in the weft direction, the high-power 2D hybrid woven copper mesh capillary structure comprises a warp part and a weft part, and the warp part and the weft part are woven in sequence in a repeated manner in the warp direction and the weft direction respectively. The warp part is arranged in an arch bridge shape, the warp part comprises a plurality of warps, the diameter of each warp is 0.04-0.06 mm, the weft part comprises a plurality of wefts, the diameter of each weft is 0.04-0.06 mm, the warps are uniformly arranged in the warp direction, and the wefts are uniformly arranged in the weft direction. According to the invention, the distribution is more uniform, the liquid flow resistance and instability are reduced, the structural support is enhanced, and both high thermal conductivity and temperature uniformity are considered.

Description

Technical Field

[0001] The present invention relates to the technical field of capillary structures of heat dissipation products, in particular to a high-power 2D hybrid braided copper mesh capillary structure and applications thereof. Background Art

[0002] The woven mesh is the core capillary structure of heat sinks and other heat dissipation devices, and its manufacturing mainly relies on a precision weaving process. This process is formed by interweaving mesh copper alloy wires according to a specific pattern: the longitudinally arranged warp wires and the transversely shuttled weft wires are staggered up and down under mechanical control to form a metal grid with uniform mesh size and shape. The mesh count is a key parameter for measuring the structure of the wire mesh (defined as the number of mesh holes per inch of length), which directly determines the capillary performance, that is, the lower the mesh count, the larger the mesh hole, and vice versa. The current heat sink generally adopts a single capillary structure (such as a single mesh copper mesh), and although the composite capillary solution (such as 100 mesh + 200 mesh copper mesh superposition) has theoretical feasibility, its practical application is still limited by traditional design. With the surge in high-performance heat dissipation needs and complex application environments (such as high gravity fields and high-power scenarios), the traditional two-dimensional metal mesh capillary structure has exposed significant defects:

[0003] Insufficient anti-gravity performance: It is difficult to meet the liquid reflux requirements in special orientation or high acceleration environments;

[0004] High-power scenarios are too costly: a single structure requires increasing material density to improve performance, resulting in a surge in costs;

[0005] Limited permeability: dense mesh hinders the flow of working fluid and reduces heat transfer efficiency;

[0006] Poor structural compatibility: It is difficult to integrate multiple mesh combinations (such as 100 mesh + 200 mesh, 200 mesh + 250 mesh) into a single device, which restricts performance optimization;

[0007] Low design freedom: Existing solutions are difficult to adapt to scenarios with irregular cavities or non-uniform heat flux density. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a high-power 2D hybrid woven copper mesh capillary structure to solve the above problems.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-power 2D hybrid woven copper mesh capillary structure, in which the warp threads are arranged in the warp direction and the weft threads are arranged in the weft direction, including a warp portion and a weft portion, and the warp portion and the weft portion are woven in a repeated manner in the warp direction and the weft direction respectively, and the weft portion is arranged in an arch bridge shape.

[0010] As a further solution of the present invention, the warp portion includes a plurality of warp threads, and the diameter of the warp threads is 0.04-0.06 mm.

[0011] As a further solution of the present invention, the weft portion includes a plurality of weft threads, and the diameter of the weft threads is 0.04-0.06 mm.

[0012] As a further solution of the present invention, the warp threads are evenly arranged in the warp direction, and the weft threads are evenly arranged in the weft direction.

[0013] As a further solution of the present invention, the mesh number of the warp portion is 100-200 meshes.

[0014] As a further solution of the present invention, the mesh number of the weft portion is 100-200 meshes.

[0015] As a further solution of the present invention, the warp portion is located at the center of the arch bridge of the weft portion.

[0016] An application of a high-power 2D hybrid woven copper mesh capillary structure, wherein the copper mesh capillary structure is used for laptops, televisions, or AR / VR heat dissipation products.

[0017] Since the present invention adopts the above technical solution, the advantages and positive effects of the present invention are:

[0018] The present invention has the advantages of more uniform distribution, reduced liquid flow resistance and instability, enhanced structural support and high stability, and both high thermal conductivity and temperature uniformity.

[0019] Compared to traditional braiding methods at the same thickness, this invention achieves a higher porosity, better overall heat conduction efficiency, and improved product stability. The arch-bridge braided structure of this invention effectively increases the gaps, conserves copper wire, and boasts a greater porosity ratio. When combined with a working fluid, it achieves a higher water area ratio and operating power, extending its applicability to a wider range of scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a high-power 2D hybrid woven copper mesh capillary structure of the present invention.

[0021] Figure 2 The figure is a high-power microscope image of the capillary structure of a high-power 2D hybrid woven copper mesh with a warp of 100 mesh and a weft of 200 mesh in an embodiment, and the image is taken by the ZY-HDMI2800 device of Shenzhen Zongyuan Weiye Technology Co., Ltd.

[0022] In the figure: 1 is the warp part, and 2 is the weft part. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1As shown, the present invention provides a high-power 2D hybrid woven copper mesh capillary structure, in which warp threads are arranged in the warp direction and weft threads are arranged in the weft direction. The structure is characterized in that it includes a warp portion 1 and a weft portion 2, and the warp portion 1 and the weft portion 2 are woven in a repetitive manner in the warp direction and the weft direction respectively, and the weft portion 2 is arranged in an arch bridge shape.

[0025] The stacking braiding method is to stack the first warp and the second warp to weave. The main problem is that during subsequent use, the stacked warp groups must be kept tightly together, otherwise they will easily become loose, causing the capillary structure of the braid to change.

[0026] The two-strand composite braiding method involves twisting two different diameters of silk into a single composite warp (or weft). This results in a copper mesh with varying mesh counts. This method requires ensuring the two strands are tightly bonded to avoid looseness. Furthermore, the twisting process can increase the combined diameter of the strands, compromising product flexibility.

[0027] In contrast, under conditions of equivalent thickness, the present invention achieves a higher porosity than double-strand composite braiding and stacked braiding, significantly improving overall heat transfer efficiency and product stability. The present invention's arched bridge braiding structure effectively increases interstices, conserves copper wire, and provides a greater porosity ratio. When combined with a working fluid, it achieves a higher water area ratio and operating power, extending its applicability to a wider range of scenarios.

[0028] Furthermore, in the present invention, the warp portion 1 includes a plurality of warp threads, and the diameter of the warp threads is 0.04-0.06 mm.

[0029] Furthermore, in the present invention, the weft portion 2 includes a plurality of weft threads, and the diameter of the weft threads is 0.04-0.06 mm.

[0030] Furthermore, the present invention provides that the warp threads are evenly arranged in the warp direction, and the weft threads are evenly arranged in the weft direction.

[0031] The invention evenly arranges the warp threads in the warp direction and evenly arranges the weft threads in the weft direction. In the present invention, the mesh number of the warp thread portion 1 is 100-200 meshes.

[0032] Furthermore, in the present invention, the mesh number of the weft portion 2 is 100-200 meshes.

[0033] Furthermore, in the present invention, the warp portion 1 is located at the center of the arch bridge of the weft portion 2.

[0034] With one warp and one weft, the wire diameter and horizontal and vertical mesh counts are selected based on the application scenario and product performance requirements. No composite processing is required; wire diameter changes are achieved directly through weaving, resulting in a simple process and stable structure. This effectively increases voids, requiring less copper wire per unit volume and mesh count, resulting in a greater void ratio. When combined with a working fluid, the water-to-area ratio and operating power are further improved.

[0035] An application of a high-power 2D hybrid woven copper mesh capillary structure, wherein the copper mesh capillary structure is used for laptops, televisions, or AR / VR heat dissipation products.

[0036] The porosity calculation formula of the present invention is: Porosity = Vpore / Vtotal*100%

[0037] From the above formula, it can be seen that the larger the V pore is, the higher the porosity is; the smaller the quantitative solid portion used in unit volume is, the higher the porosity is.

[0038] Table 1 shows the test data of the original copper mesh using the specification of 200 mesh layer plus 100 mesh layer (4pcs)

[0039]

[0040]

[0041] Table 2 is Figure 1 In one embodiment shown, the test data of high-power 2D hybrid woven copper mesh capillary structure (4 pcs) (wherein the warp is 100 mesh and the weft is 200 mesh)

[0042] No TC1 TC2 T1 T2 T3 T4 T5 T6 T7 1 68.2 58.3 52.3 51.7 50.9 52.1 52.1 51 51.5 2 67.9 55.6 51.6 50.3 50.6 50.4 50.5 50 51 3 69.3 56.7 53.4 52.2 52.2 52.3 52.1 51.9 52 7 67.4 56.6 52.1 52.1 51.8 51.7 51.5 51.5 51.3

[0043] The advantages of the embodiment in Table 2 over the original copper mesh in Table 1 are:

[0044] 1. More even distribution: Different mesh counts of warp and weft can make the capillary distribution in the heat spreader more even. The warp of 100 mesh is relatively coarse, and the weft of 200 mesh is relatively fine. Pore structures of different sizes can be formed at the warp and weft interweaving points, thereby generating different degrees of capillary force in different directions. Compared with the structure of 100 mesh plus 200 mesh bonded and sintered, the capillary force is more uniform and stable, thereby improving the performance of the heat spreader.

[0045] 2. Reduce liquid flow resistance and instability: The interweaving of warp and weft can form a specific liquid transmission channel. The 100-mesh warp wire, due to its larger pores, can serve as the main channel for rapid transmission of the working fluid, providing a larger flow rate; while the 200-mesh weft wire, due to its strong capillary force, can play a role in assisting drainage and maintaining stable liquid flow around the channel formed by the warp wire. This synergistic effect can make the transmission of the working fluid in the temperature homogenizer smoother, reducing the resistance and instability of the liquid flow.

[0046] 3. Enhanced structural support: During the use of the temperature distribution board, the internal capillary structure needs to withstand certain pressure and stress. The woven structure with 100 mesh warp and 200 mesh weft can provide better structural support in different directions. The coarse mesh of the warp can withstand greater tensile and compressive stress, and the fine mesh of the weft can fill and strengthen the space between the warp threads, making the entire capillary structure tighter and more stable. In comparison, the combination of 100 mesh and 200 mesh copper mesh is slightly inferior in terms of structural tightness and stability, and the copper mesh is prone to displacement or deformation during long-term use.

[0047] 4. Balancing high thermal conductivity and temperature uniformity: The 100-mesh warp yarn, due to its larger pores, provides a good heat conduction channel, allowing heat to be quickly transferred within the vapor chamber. The 200-mesh weft yarn, with its finer capillary structure, increases the contact area with the working fluid, improving heat exchange efficiency and achieving better temperature uniformity. This combination of warp and weft yarns can, to a certain extent, achieve both high thermal conductivity and temperature uniformity, allowing the vapor chamber to maintain good heat dissipation performance under different operating conditions.

[0048] As shown in Tables 1 and 2, the performance of the double-layer mesh is compared with the hybrid braided capillary technology, with the temperature difference (T1-T7) reduced by 3-4°C, Tcase reduced by 4-5°C, and thermal resistance ((Tcase-T1) / power) reduced by 6-8%.

[0049] Although specific embodiments of the present invention are described above, those skilled in the art should understand that these are merely examples and that various changes or modifications may be made to the embodiments without departing from the principles and essence of the present invention. The scope of protection of the present invention is limited only by the appended claims.

Claims

1. A high-power 2D hybrid woven copper mesh capillary structure, with warp threads arranged in the warp direction and weft threads arranged in the weft direction, characterized by: The invention comprises a warp portion (1) and a weft portion (2), wherein the warp portion (1) and the weft portion (2) are woven in a repetitive manner in a warp direction and a weft direction respectively, and the weft portion (2) is arranged in an arch bridge shape.

2. The high-power 2D hybrid braided copper mesh capillary structure according to claim 1, characterized in that: The warp portion (1) comprises a plurality of warp threads, and the diameter of the warp threads is 0.04-0.06 mm.

3. The high-power 2D hybrid braided copper mesh capillary structure according to claim 1, characterized in that: The weft portion (2) comprises a plurality of weft threads, and the diameter of the weft threads is 0.04-0.06 mm.

4. The high-power 2D hybrid braided copper mesh capillary structure according to claim 1, characterized in that: The warp threads are evenly arranged in a warp direction, and the weft threads are evenly arranged in a weft direction.

5. The high-power 2D hybrid braided copper mesh capillary structure according to claim 2, characterized in that: The mesh number of the warp portion (1) is 100-200 meshes.

6. The high-power 2D hybrid braided copper mesh capillary structure according to claim 3, characterized in that: The mesh number of the weft portion (2) is 100-200 meshes.

7. The high-power 2D hybrid braided copper mesh capillary structure according to claim 1, characterized in that: The warp portion (1) is located at the center of the arch bridge of the weft portion (2).

8. Application of a high-power 2D hybrid braided copper mesh capillary structure according to any one of claims 1 to 7, characterized in that: The copper mesh capillary structure is used for laptops, televisions, or AR / VR heat dissipation products.

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