Light and thin vc uniform temperature plate

Abstract

The utility model discloses a kind of light and thin VC uniform temperature plate, including upper cover shell, lower cover shell and capillary structure, the capillary structure is nylon net, be set between the upper cover shell and lower cover shell, quantitative instillation has working water liquid on the capillary structure, the edge of the upper cover shell and lower cover shell is equipped with sealing double-sided tape for vacuum sealing connection, the upper cover shell and lower cover shell are combined to form closed flat structure by sealing double-sided tape, vacuum cavity is formed in its inside, the capillary structure and working water liquid are located in vacuum cavity, cancel cannula mouth / water inlet relative to traditional uniform heating plate, sealing is pressed and sealed under vacuum environment by sealing double-sided tape, simplify production process, reduce equipment investment and working hours consumption, improve production efficiency, nylon net as capillary structure can effectively realize the circulation of working water liquid, ensure that product has stable heat conduction performance, and the weight and cost of nylon net are low, adapt to product lightweight demand, reduce production cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat exchange plates, specifically relating to a lightweight and thin VC heat exchange plate. Background Technology

[0002] VC vapor chambers are high-efficiency heat-conducting components widely used in heat dissipation scenarios in electronic equipment, new energy and other fields. Traditional VC vapor chambers usually use copper or stainless steel as the shell material and copper mesh or stainless steel mesh as the capillary structure. Their manufacturing process requires reserving insertion ports or water injection ports and going through many complex processes such as liquid injection, degassing, vacuuming, sealing and edge cutting. Not only is the overall weight large, but the production process is also cumbersome and costly, making it difficult to meet the market demand for lightweight and low-cost products. Utility Model Content

[0003] The purpose of this utility model is to address the above-mentioned problems by providing a lightweight and thin VC heat exchanger plate, which solves the problems of large overall weight, complicated manufacturing process, and high production cost of existing VC heat exchanger plates.

[0004] This utility model is achieved through the following technical solution: a lightweight VC heat spreader, comprising an upper cover shell, a lower cover shell, and a capillary structure. The capillary structure is a nylon mesh disposed between the upper cover shell and the lower cover shell. A working liquid is quantitatively dripped onto the capillary structure. Double-sided sealing adhesive is provided at the opposite edges of the upper cover shell and the lower cover shell for vacuum sealing connection. The upper cover shell and the lower cover shell are combined by the double-sided sealing adhesive to form a closed flat structure, which forms a vacuum cavity inside. The capillary structure and the working liquid are located inside the vacuum cavity.

[0005] Furthermore, both the upper cover and the lower cover are made of aluminum.

[0006] Furthermore, the inner side of the upper cover housing has two sets of protrusions arranged in an alternating pattern, and sealing ring edges are reserved at the edges of both the upper and lower cover housings. The middle part of the lower cover housing protrudes from the inside out to form a groove that accommodates the two sets of protrusions.

[0007] Furthermore, the upper cover and lower cover have a wide end of 58.7±0.15mm and a narrow end of 49.65±0.15mm at their ends, respectively, both with a length of 101.17±0.15mm and a thickness of 0.05±0.005mm. The width of the sealing ring edge is 2.35±0.15mm, the height of the boss is 0.17±0.02mm, and the depth of the groove is 0.21±0.02mm.

[0008] Furthermore, the upper cover and lower cover are passivated, and a passivation film is formed on their surfaces.

[0009] Furthermore, the nylon mesh is attached to a fixing adhesive paper, the cutting shape of which is adapted to the cutting shape of the nylon mesh.

[0010] Compared to traditional heat spreaders, this invention eliminates the need for pipe / water inlet ports, and removes the cumbersome processes of laser sealing and edge trimming. Sealing is achieved through double-sided adhesive under vacuum, replacing the traditional step-by-step process of vacuuming and laser sealing after liquid injection. This simplifies the production process, reduces equipment investment and labor costs, and improves production efficiency. The nylon mesh, as a capillary structure, effectively circulates the working fluid, ensuring stable thermal conductivity. Furthermore, the weight and cost of nylon mesh are lower than copper / stainless steel, meeting the requirements for lightweight products and reducing production costs. Attached Figure Description

[0011] Figure 1 This is an exploded three-dimensional view of the present invention. Figure 2 This is a bottom view of the upper cover shell in this utility model; Figure 3 This is a top view of the lower cover shell of this utility model; Figure 4 This is a partial cross-sectional schematic diagram of the structure of this utility model in its combined state; Figure 5 This is an enlarged cross-sectional schematic diagram of part of the structure in the combined state of this utility model.

[0012] The attached figures are labeled as follows: 1. Upper cover housing; 11. Groove; 2. Lower cover housing; 21. Boss; 3. Nylon mesh; 31. Fixing adhesive tape; 4. Sealing ring edge. Detailed Implementation

[0013] The present invention will be further illustrated below with reference to specific examples and accompanying drawings.

[0014] like Figures 1-5 As shown, this utility model describes a lightweight VC heat spreader, comprising an upper cover shell 1, a lower cover shell 2, and a capillary structure. The capillary structure is a nylon mesh 3, disposed between the upper cover shell 1 and the lower cover shell 2. A working liquid is quantitatively dripped onto the capillary structure. Double-sided sealing adhesive is provided at the opposite edges of the upper cover shell 1 and the lower cover shell 2 for vacuum sealing connection. The upper cover shell 1 and the lower cover shell 2 are combined by the double-sided sealing adhesive to form a closed flat structure, which forms a vacuum cavity inside. The capillary structure and the working liquid are located inside the vacuum cavity.

[0015] In this invention, the boiling point of the working fluid in the vacuum chamber is lower than that under normal pressure, allowing it to easily undergo phase change (i.e., vaporization) at the heat dissipation temperature of electronic devices. During vaporization, a large amount of heat is carried away to achieve a heat dissipation effect. By using nylon mesh 3 as a capillary structure and laying it between the upper cover shell 1 and the lower cover shell 2, the pores of the nylon mesh 3 provide a dispersion space for the vaporization of the working fluid, avoiding the working fluid from vaporizing at a certain point and causing local overheating. At the same time, the vaporized working fluid can quickly diffuse to all parts of the vacuum chamber and eventually reach the cold end area with a lower temperature. The cold end area is usually connected to heat dissipation components such as heat sink fins and fans. The vaporized working fluid recondenses into a liquid state in the cold end area. The liquefied working fluid adheres to the nylon mesh 3 at the cold end. Through the capillary force generated by the tiny pores formed by the interwoven fibers of the nylon mesh 3, the liquefied working fluid is adsorbed back to the heat absorption end to replenish the liquid working fluid consumed by vaporization. Compared to traditional heat spreaders, this invention eliminates the need for pipe / water inlet ports, and removes the cumbersome processes of laser sealing and edge trimming. Sealing is achieved through double-sided adhesive under vacuum, replacing the traditional step-by-step process of vacuuming and laser sealing after liquid injection. This simplifies the production process, reduces equipment investment and labor costs, and improves production efficiency. The nylon mesh 3, as a capillary structure, effectively circulates the working liquid, ensuring stable thermal conductivity. Furthermore, the weight and cost of nylon mesh 3 are lower than copper / stainless steel, meeting the requirements for lightweight products and reducing production costs.

[0016] In this embodiment of the utility model, both the upper cover shell 1 and the lower cover shell 2 are made of aluminum, replacing the traditional copper or stainless steel, which greatly reduces the overall weight of the VC heat spreader and is more suitable for weight-sensitive application scenarios, further meeting the product's lightweight requirements.

[0017] Because the hardness of aluminum used as the shell is lower than that of copper or stainless steel in traditional heat spreader shells, and the interior is a vacuum cavity (i.e., without air pressure support), if the upper and lower covers are directly attached, the cavity is prone to collapse due to external pressure or temperature changes, thereby damaging the capillary structure and vacuum environment. This utility model addresses this by having two sets of protrusions 21 arranged in an alternating array on the inner side of the upper cover shell 1. Both the upper cover shell 1 and the lower cover shell 2 have pre-reserved sealing ring edges 4 for attaching double-sided adhesive. The middle of the lower cover shell 2 protrudes from the inside out, forming a groove 11 that accommodates the two sets of protrusions 21. The protrusions 21 directly contact the nylon mesh 3 above the lower cover shell 2, forming a multi-point support structure that acts like a bracket to support the upper cover. The lower cover shell 2 prevents the cavity from being crushed by atmospheric pressure under vacuum, ensuring that the cavity always maintains the preset internal space (sufficient volume is required for the phase change of the working water). The protrusions 21 are evenly and staggered, which can not only avoid blocking the effective area of ​​the nylon mesh 3, but also form micro channels between the protrusions 21 to help the vaporized working water diffuse from the heat source area to the cold end, while not hindering the capillary backflow of the liquid working water through the nylon mesh 3, indirectly improving the heat conduction efficiency. In addition, aluminum has good ductility but weak rigidity. By setting protrusions 21 to support and improve rigidity, there is no need to increase the shell thickness (i.e., avoid the weight increase). The support can be enhanced by only local structural protrusions, taking into account the advantages of lightweight and structural strength.

[0018] The upper cover shell 1 and the lower cover shell 2 have a wide end of 58.7±0.15mm and a narrow end of 49.65±0.15mm respectively, both with a length of 101.17±0.15mm and a thickness of 0.05±0.005mm. The width of the sealing ring edge 4 is 2.35±0.15mm, the height of the boss 21 is 0.17±0.02mm, the depth of the groove 11 is 0.21±0.02mm, and a nylon mesh 3 is placed between the bottom surface of the groove 11 and the top surface of the boss 21.

[0019] Furthermore, the upper cover housing 1 and the lower cover housing 2 are passivated, and a passivation film is formed on their surfaces, which can improve corrosion resistance and help extend the product's service life.

[0020] To prevent the nylon mesh 3 from shifting due to external force after placement, thus affecting the sealing performance, a corresponding fixing structure is provided on one side of the nylon mesh 3 in this embodiment of the invention. Specifically, as shown in the figure... Figure 5 As shown, the nylon mesh 3 is attached to the fixing tape 31, and the cutting shape of the fixing tape 31 is adapted to the cutting shape of the nylon mesh 3.

[0021] The above embodiments are merely preferred embodiments of the present utility model and are only used to explain the present utility model, not to limit the present utility model. Any changes, substitutions, combinations, simplifications, modifications, etc., made by those skilled in the art without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A lightweight and thin VC heat spreader, characterized in that: It includes an upper cover shell (1), a lower cover shell (2) and a capillary structure. The capillary structure is a nylon mesh (3) and is disposed between the upper cover shell (1) and the lower cover shell (2). A working liquid is quantitatively dripped onto the capillary structure. The upper cover shell (1) and the lower cover shell (2) are provided with sealing double-sided adhesive for vacuum sealing connection at their opposite edges. The upper cover shell (1) and the lower cover shell (2) are combined by sealing double-sided adhesive to form a closed flat structure, which forms a vacuum cavity inside. The capillary structure and the working liquid are located in the vacuum cavity.

2. The thin and light VC heat spreader according to claim 1, characterized in that: Both the upper cover shell (1) and the lower cover shell (2) are made of aluminum.

3. The thin and light VC heat spreader according to claim 2, characterized in that: The inner side of the upper cover housing (1) has two sets of protrusions (21) arranged in an alternating pattern. Both the upper cover housing (1) and the lower cover housing (2) have a sealing ring edge (4) reserved at their edges. The middle part of the lower cover housing (2) protrudes from the inside out to form a groove (11) that fits to accommodate the two sets of protrusions (21).

4. The thin and light VC heat spreader according to claim 3, characterized in that: The upper cover housing (1) and the lower cover housing (2) have a wide end of 58.7±0.15mm and a narrow end of 49.65±0.15mm respectively. Their lengths are both 101.17±0.15mm and their thicknesses are both 0.05±0.005mm. The width of the sealing ring edge (4) is 2.35±0.15mm, the height of the boss (21) is 0.17±0.02mm, and the depth of the groove (11) is 0.21±0.02mm.

5. The thin and light VC heat spreader according to claim 1, characterized in that: The upper cover shell (1) and the lower cover shell (2) are passivated, and a passivation film is formed on their surfaces.

6. The thin and light VC heat spreader according to claim 1, characterized in that: The nylon mesh (3) is attached to the fixing tape (31), and the cutting shape of the fixing tape (31) is adapted to the cutting shape of the nylon mesh (3).

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