Vapor chamber structure with fins
By designing a finned heat-smoothing plate structure, the combination of support column, liquid absorbent core and fin cover plate is used to solve the problems of low convection heat transfer efficiency and contact thermal resistance of the heat-smoothing plate, achieving more efficient heat dissipation and longer service life.
Patent Information
- Application Number
- CN202323649465.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2033-12-29
AI Technical Summary
Due to its flat surface, the convection heat transfer efficiency between the cold source is low, and there is uncontrollable contact thermal resistance and complex processing technology when the fins are installed through welding.
A finned heat homogenization plate structure is designed, and a welding layer is formed to connect the support plate shell and the fin cover plate by combining the support column array, the liquid absorbent core and the fin cover plate. The top of the fin cover plate is equipped with array arranged fins to realize convective heat exchange.
It effectively improves the convection heat transfer efficiency of the heat-efficient plate, solves the problems of contact thermal resistance and processing complexity, and extends the service life of the heat-efficient plate.
Smart Images
Figure CN222582803U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat spreaders, and in particular to a heat spreader structure with fins. Background Art
[0002] As a phase change device with high heat transfer and fast startup characteristics, the vapor chamber has been applied in all walks of life. Especially in recent years, the heat dissipation of high-power electronic products has become the focus of attention as the device with the highest known thermal conductivity.
[0003] However, due to its relatively flat surface, the convective heat transfer efficiency between the vapor chamber and the cold source is low. If it is necessary to enhance the convective heat transfer efficiency through air cooling, fins, an effective structure for enhancing convective heat transfer, can be used. However, installing the fins on the vapor chamber by welding will result in uncontrollable contact thermal resistance, and the processing technology is extremely complex.
[0004] Therefore, a heat spreader structure with fins is urgently needed to solve the problem of poor convective heat transfer effect caused by contact thermal resistance between the fins and the heat spreader. Utility Model Content
[0005] In view of the deficiencies in the prior art, the utility model proposes a vapor chamber structure with fins, which can effectively improve the efficiency of convective heat transfer of the vapor chamber.
[0006] The utility model provides a heat spreader structure with fins, a support plate shell, a support column, a liquid injection port, a liquid absorption core and a fin cover plate, wherein the support columns are arranged in an array in the support plate shell, the liquid injection port is arranged on the outside of the support plate shell and is connected to the support plate shell, the liquid absorption core surrounds the support column and is arranged in the support plate shell to form a steam chamber for heat exchange, and a welding layer formed for connecting the support plate shell and the fin cover plate is located on the wall of the liquid absorption core between adjacent steam chambers, and the top end of the fin cover plate includes a plurality of fins arranged in an array, and the fin cover plate is covered and fixed to the top end of the support plate shell and performs convection heat exchange with the outside through the fins.
[0007] A preferred technical solution of the present invention is that the shape of the support column includes a cylindrical shape, a polygonal prism or an irregular column shape.
[0008] The preferred technical solution of the utility model is that the supporting plate shell is made of metal material or ceramic material, and the metal material includes but is not limited to copper, copper alloy, aluminum, aluminum alloy, copper-aluminum alloy and stainless steel.
[0009] The preferred technical solution of the utility model is that the liquid absorbent core is arranged on the outside of the support column and the bottom and side wall of the support plate shell through sintering processing, and the sintered thickness of the liquid absorbent core is 0.5mm-1.5mm.
[0010] The preferred technical solution of the utility model is that the material of the liquid absorbent core and the material of the support plate shell are the same metal, and the structure of the liquid absorbent core includes a mesh liquid absorbent core and a powder liquid absorbent core.
[0011] An optimal technical solution of the present invention is that the array arrangement of the support columns includes a triangular array arrangement, a circular array arrangement, an elliptical array arrangement, a polygonal array arrangement and an irregular array arrangement.
[0012] The preferred technical solution of the utility model is that the shapes of the fins include triangle, rectangle, square, polygon, circle, spiral, corrugated, sawtooth, needle, longitudinal, plate and irregular shapes.
[0013] The preferred technical solution of the utility model is that the array arrangement of the fins on the fin cover includes a triangular array arrangement, a circular array arrangement, an elliptical array arrangement, a polygonal array arrangement and an irregular array arrangement.
[0014] An optimal technical solution of the utility model is that the liquid injection port injects the working medium into the cavity formed by the support plate shell and the fin cover plate through a connected liquid injection pipe.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] (1) The utility model improves the structural design and process of welding between the support columns of the heat spreader, which can improve the heat transfer stability and service life of the heat spreader.
[0017] (2) The utility model uses the heat dissipation fins on the top of the cover plate to transfer the heat of the heat spreader through the fins for convective heat exchange, effectively solving the problem of low convective heat exchange efficiency of the heat spreader and improving the convective heat dissipation efficiency of the heat spreader. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the implementation methods of the present utility or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present utility. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0019] Figure 1 This is a schematic diagram of a heat sink structure with fins according to the utility model;
[0020] Figure 2 It is a schematic diagram of a supporting plate shell in a heat spreader structure with fins of the utility model;
[0021] Figure 3 for Figure 2 A top view of
[0022] Figure 4 for Figure 2 Side view of
[0023] Figure 5 It is a schematic diagram of a fin cover plate in a heat sink structure with fins according to the utility model;
[0024] Figure 6 for Figure 5 A top view of
[0025] Figure 7 This is a schematic diagram of the structure of the heat sink in Example 2;
[0026] Figure 8 This is a schematic diagram of the structure of the heat sink in Example 3;
[0027] Fig. 9 This is a schematic diagram of the structure of the heat sink in Example 4;
[0028] Fig.10 It is a schematic diagram of the structure of the fin in the fifth embodiment.
[0029] Figure identification: 1-support plate shell, 2-support column, 3-liquid injection port, 4-liquid absorption core, 5-fin cover plate, 51-fin, 6-steam chamber, 7-welding layer. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] See also Figures 1 to 6 The utility model embodiment discloses a heat spreader structure with fins 51, comprising: a support plate shell 1, a support column 2, a liquid injection port 3, a liquid wick 4 and a fin cover plate 5, wherein the support columns 2 are arranged in an array in the support plate shell 1, the liquid injection port 3 is arranged on the outside of the support plate shell 1 and communicates with the support plate shell 1, the liquid wick 4 surrounds the support column 2 and is arranged in the support plate shell 1 to form a steam chamber 6 for heat exchange, and a welding layer 7 formed for connecting the support plate shell 1 and the fin cover plate 5 is located on the wall of the liquid wick 4 between adjacent steam chambers 6, and the top of the fin cover plate 5 includes a plurality of fins 51 arranged in an array, and the fin cover plate 5 is covered and fixed on the top of the support plate shell 1 and performs convection heat exchange with the outside through the fins 51.
[0034] It should be noted that the heat spreader shell is formed by using a cover plate with fins 51. As a part of the heat spreader, the fins 51 do not have contact thermal resistance, which can enable the heat spreader to perform heat exchange more efficiently.
[0035] In one embodiment of the present disclosure, the shape of the support column 2 includes a cylindrical shape, a polygonal prism or an irregular column shape.
[0036] In one embodiment of the present disclosure, the support plate housing 1 is made of a metal material or a ceramic material, and the metal includes but is not limited to copper, copper alloy, aluminum, aluminum alloy, copper-aluminum alloy and stainless steel.
[0037] In one embodiment of the present disclosure, the liquid absorbent core 4 is disposed on the outside of the support column 2 and the bottom and side wall of the support plate shell 1 by sintering, and the sintered thickness of the liquid absorbent core 4 is 0.5 mm-1.5 mm.
[0038] In one embodiment of the present disclosure, the material of the liquid absorbent core 4 and the material of the support plate shell 1 are the same metal, and the structure of the liquid absorbent core 4 includes a mesh liquid absorbent core 4 and a powder liquid absorbent core 4 .
[0039] In one embodiment of the present disclosure, the array arrangement of the support columns 2 includes a triangular array arrangement, a circular array arrangement, an elliptical array arrangement, a polygonal array arrangement and an irregular array arrangement.
[0040] In one embodiment of the present disclosure, the shapes of the fins 51 include triangle, rectangle, square, polygon, circle, spiral, corrugated, sawtooth, needle, longitudinal, plate and irregular shapes.
[0041] In one embodiment of the present disclosure, the array arrangement of the fins 51 on the fin cover 5 includes a triangular array arrangement, a circular array arrangement, an elliptical array arrangement, a polygonal array arrangement and an irregular array arrangement.
[0042] In one embodiment of the present disclosure, the liquid injection port 3 injects the working medium into the cavity formed by the support plate shell 1 and the fin cover plate 5 by connecting the liquid injection pipe.
[0043] The utility model improves the structural design and process of the welding between the heat spreader support columns 2, which can improve the heat transfer stability and service life of the heat spreader, and transfers the heat of the heat spreader through the fins 51 through the heat dissipation fins 51 on the top of the cover plate for convective heat exchange, effectively solving the problem of low convective heat exchange efficiency of the heat spreader and improving the convective heat dissipation efficiency of the heat spreader.
[0044] Embodiment 2
[0045] like Figure 7 As shown, the difference between the second embodiment of the utility model and the first embodiment is that the support plate shell 1 and the upper cover plate are welded together by diffusion welding and / or brazing process. It should be noted that no matter which welding process is used, the internal structure of the heat spreader has multiple modes according to the different welding positions. The first mode is shown in the figure, which requires the upper cover plate to reserve more physical dimensions to adapt to the processing of the support plate shell 1. In the first mode, the welding layer 7 is located at the bottom of the support plate shell 1, and the sintering of the wick 4 is also carried out in the support plate shell 1, which is adapted to different welding positions of the heat spreader.
[0046] The invention improves the structural design and process of the welding between the heat spreader support columns 2, which can improve the heat transfer stability and service life of the heat spreader. The heat of the heat spreader is transferred to the heat spreader through the fins 51 on the top of the cover plate for convective heat exchange, which effectively solves the problem of low convective heat exchange efficiency of the heat spreader and improves the convective heat dissipation efficiency of the heat spreader.
[0047] Embodiment 3
[0048] like Figure 8 As shown, the difference between the third embodiment of the utility model and the first embodiment is that the support plate shell 1 and the fin cover plate 5 are welded together by diffusion welding and / or brazing process. It should be noted that no matter which welding process is used, the internal structure of the heat spreader has multiple modes according to the different welding positions. The second mode is shown in the figure, which requires sintering the liquid wick 4 on the support plate shell 1 and the fin cover plate 5 at the same time. At this time, the welding layer 7 of the heat spreader is located in the middle of the liquid wick 4.
[0049] The invention improves the structural design and process of the welding between the heat spreader support columns 2, which can improve the heat transfer stability and service life of the heat spreader. The heat of the heat spreader is transferred to the heat spreader through the fins 51 on the top of the cover plate for convective heat exchange, which effectively solves the problem of low convective heat exchange efficiency of the heat spreader and improves the convective heat dissipation efficiency of the heat spreader.
[0050] Embodiment 4
[0051] like Fig. 9 As shown, the difference between Example 4 of the utility model and Example 1 is that the fins 51 on the rice cover are prepared by fixing the packaged heat spreader on a milling machine, and the solid area of the upper cover is processed by milling to obtain the fin 51 structure, wherein the type and parameters of the fin 51 are determined according to actual needs, and the shapes of the fins 51 include triangles, rectangles, squares, polygons, circles, spirals, corrugated shapes, sawtooth shapes, needle shapes, longitudinal shapes, plates and irregular shapes, and the array arrangement of the fins 51 on the fin cover 5 includes triangular array arrangement, circular array arrangement, elliptical array arrangement, polygonal array arrangement and irregular array arrangement.
[0052] The utility model improves the structural design and process of the welding between the heat spreader support columns 2, which can improve the heat transfer stability and service life of the heat spreader, and transfers the heat of the heat spreader through the fins 51 through the heat dissipation fins 51 on the top of the cover plate for convective heat exchange, effectively solving the problem of low convective heat exchange efficiency of the heat spreader and improving the convective heat dissipation efficiency of the heat spreader.
[0053] Embodiment 5
[0054] like Fig.10As shown, the difference between the fifth embodiment of the utility model and the first embodiment is that the fin 51 used for convective heat dissipation of the heat spreader in the first embodiment is a solid structure, and in the fifth embodiment, the fin 51 can be a cavity fin 51 with a steam cavity 6 and a liquid wick, wherein the upper steam cavity 6 of the fin 51 and the lower steam cavity 6 at the bottom of the heat spreader are formed by the liquid wick 4, and an internal phase change cycle is performed in the hollow fin of the fifth embodiment. After the heat on the bottom surface of the heat spreader evaporates the working fluid, the working fluid vapor comes to the hollow fin above The condensation in the steam chamber 6 turns back into the working fluid liquid, and the working fluid liquid is returned to the cavity below the heat spreader by the liquid absorption core 4 from the upper hollow fin through the pump pressure; at the same time, the working fluid liquid evaporates below the heat spreader, and the working fluid vapor condenses on the liquid absorption core sintered above the heat spreader and in the fin cavity to form liquid working fluid again, and the liquid working fluid is pumped into the cavity below the heat spreader by the liquid absorption core 4. Such a structural design can also effectively solve the problem of low convective heat transfer efficiency of the heat spreader and improve the convective heat dissipation efficiency of the heat spreader.
[0055] The above description is only a preferred implementation mode of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A heat sink structure with fins, used for battery heat dissipation, characterized in that: include: A support plate shell (1), a support column (2), a liquid injection port (3), a liquid absorption core (4) and a fin cover plate (5), wherein the support columns (2) are arranged in an array in the support plate shell (1), the liquid injection port (3) is arranged on the outside of the support plate shell (1) and is connected to the support plate shell (1), the liquid absorption core (4) surrounds the support column (2) and is arranged in the support plate shell (1) to form a steam chamber (6) for heat exchange, and a welding layer (7) formed for connecting the support plate shell (1) and the fin cover plate (5) is located on the wall of the liquid absorption core (4) between adjacent steam chambers (6), and the top end of the fin cover plate (5) includes a plurality of fins (51) arranged in an array, and the fin cover plate (5) is covered and fixed on the top end of the support plate shell (1) and performs convection heat exchange with the outside through the fins (51).
2. The finned heat sink structure according to claim 1, characterized in that: The shape of the support column (2) includes a cylinder or a polygonal prism.
3. The finned heat sink structure according to claim 1, characterized in that: The support plate shell (1) is made of a metal material or a ceramic material, and the metal material includes copper, copper alloy, aluminum, aluminum alloy, copper-aluminum alloy and stainless steel.
4. The finned heat sink structure according to claim 3, characterized in that: The liquid absorbent core (4) is arranged on the outside of the support column (2) and the bottom and side wall of the support plate shell (1) through sintering processing, and the sintered thickness of the liquid absorbent core (4) is 0.5 mm-1.5 mm.
5. The finned vapor chamber structure according to claim 4, characterized in that: The material of the liquid absorbent core (4) is the same metal as the material of the support plate shell (1), and the structure of the liquid absorbent core (4) includes a mesh liquid absorbent core (4) and a powder liquid absorbent core (4).
6. The finned heat sink structure according to claim 1, characterized in that: The array arrangement of the support columns (2) includes a triangular array arrangement, a circular array arrangement, an elliptical array arrangement and a polygonal array arrangement.
7. The finned heat sink structure according to claim 1, characterized in that: The shapes of the fins (51) include triangle, rectangle, square, polygon, circle, spiral, corrugated, sawtooth, needle, longitudinal and plate.
8. The finned vapor chamber structure according to claim 1, characterized in that: The array arrangement of the fins (51) on the fin cover plate (5) includes a triangular array arrangement, a circular array arrangement, an elliptical array arrangement and a polygonal array arrangement.
9. The finned vapor chamber structure according to claim 1, characterized in that: The liquid injection port (3) is connected to the liquid injection pipe to inject the working fluid into the cavity formed by the support plate shell (1) and the fin cover plate (5).