Vapor chamber with good supporting and heat transfer performance
By employing coarse and fine metal powder layers and support columns of different shapes in the heat spreader, the problems of cover plate depression and local hot spots under high heat flux density were solved, thereby improving structural stability and heat transfer performance.
Patent Information
- Application Number
- CN202422879518.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-25
AI Technical Summary
Existing heat spreaders are prone to problems such as central depression of the cover plate and local hot spots under high heat flux density, and their structural strength and heat transfer performance are insufficient.
The design employs coarse and fine metal powder layers and support column structures of different shapes. The fine metal powder layer enhances capillary force, the coarse metal powder layer reduces flow resistance, the hexagonal support column increases stability, and the cylindrical support column provides support, thus optimizing the support structure in both heat source and non-heat source areas.
This improves the structural stability and heat transfer performance of the heat exchanger, reduces local hot spots, enhances the flow rate and vapor circulation of the working fluid, and improves the overall heat transfer efficiency.
Smart Images
Figure CN223503240U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchanger technology, and in particular to a heat exchanger with good support and heat transfer performance. Background Technology
[0002] The increased integration of new-generation electronic information equipment has led to a significant increase in heat dissipation, placing higher demands on heat transfer devices. Vapor chambers based on the phase change heat transfer principle of liquid working fluids, with their high heat transfer efficiency, fast start-up performance, and superior temperature uniformity, have become an important choice for solving the problem of concentrated heat dissipation in high heat flux density electronic component chips.
[0003] The vapor chamber mainly consists of a cover plate, a liquid wick, and a working fluid. During operation, external heat is transferred to the liquid working fluid through the cover plate and liquid wick on the evaporation surface, causing the liquid working fluid to evaporate and vaporize due to the temperature rise. The gaseous working fluid is then transferred to the condensation surface under the action of the pressure difference, releasing heat and re-condensing into a liquid. The liquid working fluid then flows back to the phase change point on the evaporation surface under the capillary force of the liquid wick in the reflux structure. This cycle is repeated, allowing heat to rapidly diffuse from a concentrated area to the entire condensation surface.
[0004] Existing vapor chambers typically have metal powder of uniform coarseness on the inner wall of the cover plate, and the supporting structure generally uses a solid cylinder of sintered copper powder. However, when electronic component chips generate high heat flux densities, the center of the cover plate is prone to depression and localized hot spots. Therefore, it is necessary to optimize the structure of the chip heat source location to improve the structural strength and heat transfer performance of the vapor chamber. Utility Model Content
[0005] To address the aforementioned technical problems, a heat exchange plate with good support and heat transfer performance is provided.
[0006] To achieve the above objectives, in a preferred embodiment of the present invention, the device includes an upper cover plate and a lower cover plate. The inner surface of the upper cover plate is provided with a coarse metal powder layer. The central region of the lower cover plate is a heat source region. The heat source region is provided with a fine metal powder layer and a hexagonal support column. The outer side of the heat source region is provided with a coarse metal powder layer and a cylindrical support column.
[0007] In a preferred embodiment, the present invention may be further configured such that both the coarse metal powder layer and the fine metal powder layer are copper powder sintered layers.
[0008] In a preferred embodiment, the present invention may be further configured such that the coarse metal powder layer of the lower cover plate is sintered on the outside of the fine metal powder layer.
[0009] In a preferred embodiment, the present invention may be further configured such that the particle size of the fine metal powder layer ranges from 110 mesh to 150 mesh.
[0010] In a preferred embodiment, the present invention may be further configured such that the particle size of the coarse metal powder layer ranges from 70 mesh to 110 mesh.
[0011] In a preferred embodiment, the present invention may be further configured such that the hexagonal support column is hollow inside and has a through ventilation groove on its wall.
[0012] In a preferred embodiment, the hexagonal support columns are arranged in a honeycomb pattern.
[0013] In a preferred embodiment, the present invention may be further configured such that the cylindrical support columns are arranged in a matrix.
[0014] Beneficial effects: This utility model provides a heat spreader with good support and heat transfer performance. The fine metal powder layer in the heat source area can enhance the capillary force of the powder and accelerate the reaction rate of the working fluid; the coarse metal powder layer in the non-heat source area can reduce the flow resistance of the working fluid and increase the flow velocity; the support columns can prevent the collapse of the upper and lower cover plates, and the different support columns further increase the stability of the structure. In addition, the gaps between the hexagonal support columns are more conducive to the flow of steam, reduce local hot spots, and the hexagonal support columns can enhance the support strength. Attached Figure Description
[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0017] Figure 2 This is a schematic diagram of the hexagonal support column and the cylindrical support column of this utility model.
[0018] In the diagram, 1 is the upper cover plate; 2 is the lower cover plate; 3 is the fine metal powder layer; 4 is the coarse metal powder layer; 5 is the hexagonal support column; and 6 is the cylindrical support column. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] like Figure 1 and Figure 2As shown, a heat spreader with good support and heat transfer performance includes an upper cover plate 1 and a lower cover plate 2. The inner surface of the upper cover plate 1 is provided with a coarse metal powder layer 4. The central area of the lower cover plate 2 is a heat source area, on which a fine metal powder layer 3 and a hexagonal support column 5 are provided. The outer side of the heat source area is provided with a coarse metal powder layer 4 and a cylindrical support column 6.
[0021] The coarse metal powder layer 4 on the inner surface of the upper cover plate 1 and the fine metal powder layer 3 on the lower cover plate are both copper powder sintered layers.
[0022] The heat source area is surrounded by a coarse metal powder layer 4, which is combined with the fine metal powder layer on the outside and is a copper powder sintered layer.
[0023] The fine metal powder layer 3 has a particle size range of 110 mesh to 150 mesh. The fine metal powder layer can enhance the capillary force of the powder and accelerate the reaction rate of the working fluid.
[0024] The coarse metal powder layer 4 has a particle size range of 70 mesh to 110 mesh. The coarse metal powder layer can reduce the flow resistance of the working fluid and increase the flow velocity.
[0025] The hexagonal support column 5 is hollow inside, with through ventilation slots on its walls. The hexagonal support column 5 is located in the heat source area, while the cylindrical support column 6 is located in the non-heat source area. The cylindrical support columns 6 are arranged in a matrix, while the hexagonal support columns 5 are arranged in a honeycomb pattern. The support columns prevent the collapse of the upper and lower cover plates, and the different types of support columns further increase the stability of the structure. Furthermore, the honeycomb arrangement of the hexagonal support columns facilitates steam circulation, reduces localized hot spots, and strengthens the support structure.
[0026] It should be noted that in this article, relational terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities.
[0027] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.
Claims
1. A heat spreader with good support and heat transfer performance, characterized in that, It includes an upper cover plate and a lower cover plate. The inner surface of the upper cover plate is provided with a coarse metal powder layer. The central area of the lower cover plate is a heat source area. The heat source area is provided with a fine metal powder layer and a hexagonal support column. The outer side of the heat source area is provided with a coarse metal powder layer and a cylindrical support column.
2. A heat spreader with good support and heat transfer performance according to claim 1, characterized in that, Both the coarse metal powder layer and the fine metal powder layer are copper powder sintered layers.
3. A heat spreader with good support and heat transfer performance according to claim 2, characterized in that, The coarse metal powder layer of the lower cover plate is sintered on the outside of the fine metal powder layer.
4. A heat spreader with good support and heat transfer performance according to claim 1, characterized in that, The particle size range of the fine metal powder layer is 110 mesh to 150 mesh.
5. A heat spreader with good support and heat transfer performance according to claim 1, characterized in that, The particle size range of the coarse metal powder layer is 70 mesh to 110 mesh.
6. A heat spreader with good support and heat transfer performance according to claim 1, characterized in that, The hexagonal support column is hollow inside, and its walls have through ventilation slots.
7. A heat spreader with good support and heat transfer performance according to claim 1, characterized in that, The hexagonal support columns are arranged in a honeycomb pattern.
8. A heat spreader with good support and heat transfer performance according to claim 1, characterized in that, The cylindrical support columns are arranged in a matrix.