Three-dimensional vapor chamber joint structure

Abstract

The utility model relates to a three-dimensional uniform temperature plate joint structure, which comprises a shell, a heat pipe, a capillary structure and a working fluid, the shell comprises a first shell plate and a second shell plate, a cavity is formed between the first shell plate and the second shell plate, the second shell plate is provided with a through hole, and the periphery of the through hole is provided with a concave groove; the heat pipe penetrates through the through hole and is provided with an opening end, a flange is arranged at the opening end, the flange is contained in the concave groove, and the heat pipe is combined with the second shell plate through the flange and the welding product in the concave groove; the capillary tissue is arranged in the accommodating cavity and is attached to the shell; the working fluid is arranged in the containing cavity. Therefore, the combination is stable, the strength is high, and the low-melting-point welding flux can be prevented from entering the containing cavity to influence the transmission of the working fluid.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heat dissipation technical field, especially a three-dimensional vapor chamber joint structure. BACKGROUND

[0002] The existing three-dimensional vapor chamber structure mainly comprises a vapor chamber and a plurality of heat pipes, each heat pipe is vertically arranged on the vapor chamber, and the cavity in the vapor chamber and the chambers of the heat pipes are connected with each other, so that the vapor-liquid phase change is used to achieve rapid heat conduction and heat dissipation efficiency.

[0003] However, the existing three-dimensional vapor chamber structure has heat conduction and heat dissipation efficiency, but there are still some problems to be solved in the actual use process. Since the heat pipes and the vapor chamber are combined by copper paste or tin paste, the vibration during assembly or transportation can cause loosening and other adverse conditions. In addition, the copper paste or tin paste can easily enter the cavity during the manufacturing process, thereby affecting or blocking the transmission path of the internal working fluid, thereby reducing the heat conduction and heat dissipation efficiency.

[0004] Therefore, the utility model person researches and cooperates with the use of theory, and tries to solve the above problems, which is the improvement goal of the utility model person. SUMMARY

[0005] The utility model discloses a three-dimensional vapor chamber joint structure, which is not only stable and high in strength, but also can prevent low-melting-point solder from entering the cavity and affecting the transmission of working fluid.

[0006] In order to achieve the above purpose, the utility model provides a three-dimensional vapor chamber joint structure, which comprises a shell, a plurality of heat pipes, a capillary organization and a working fluid. The shell comprises a first shell plate and a second shell plate tightly sealed corresponding to the first shell plate, a cavity is formed between the first shell plate and the second shell plate, a plurality of through holes are provided on the second shell plate, and a recessed groove is provided on the outer periphery of each through hole. Each heat pipe is arranged corresponding to each through hole, each heat pipe has an open end, a flange is arranged on the open end, each flange is arranged in each recessed groove, and each heat pipe is combined with the second shell plate through a welding product in the flange and the recessed groove. The capillary organization is arranged in the cavity and attached to the shell. The working fluid is arranged in the cavity.

[0007] In an embodiment, the welding product is formed by laser welding.

[0008] In an embodiment, the recessed groove has an inner peripheral surface, the flange has an outer peripheral surface, and the welding product is formed between the outer peripheral surface and the inner peripheral surface.

[0009] In one embodiment, the second shell plate includes a top plate, and a convex bump higher than an outer surface of the top plate is formed at a position corresponding to each of the recessed grooves.

[0010] In one embodiment, a lower surface of the flange is flush with or lower than an inner surface of the top plate of the second shell plate.

[0011] In one embodiment, the flange extends in a flared manner from the open end of the heat pipe, and a center line of the flange and the heat pipe is in a vertical configuration.

[0012] In one embodiment, a ring wall extends around each of the through holes, and each of the heat pipes penetrates through each of the ring walls.

[0013] In one embodiment, a sealing layer is further provided between each of the heat pipes and each of the ring walls.

[0014] In one embodiment, the sealing layer is formed by a soft soldering or a hard soldering.

[0015] In one embodiment, a plurality of support columns are further provided, and each of the support columns is arranged in the cavity and stands between the first shell plate and the second shell plate.

[0016] The utility model discloses still have following effect, can avoid in the processing process, because copper paste or tin paste etc. Low melting point solder is melted after being heated and blocks the pore of capillary tissue, and make the moving path of internal working fluid to be blocked. Its heat effect is small in the manufacturing process, and the workpiece deformation is small. Its firmness and reliability after combination are extremely good. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the exploded view of second shell plate and each heat pipe of the utility model.

[0018] Figure 2 It is the combined appearance view of second shell plate and each heat pipe of the utility model.

[0019] Figure 3 It is the combined sectional view and local area enlarged view of second shell plate and each heat pipe of the utility model.

[0020] Figure 4 It is the exploded view of second shell plate and each heat pipe after combination of the utility model and capillary tissue

[0021] Figure 5 It is the exploded view of three-dimensional uniform temperature plate joint structure of the utility model.

[0022] Figure 6 It is the appearance view of three-dimensional uniform temperature plate joint structure of the utility model.

[0023] Figure 7 Figure 3 is a sectional view of the three-dimensional uniform temperature plate joint structure combination of the present application.

[0024] In the figure:

[0025] 10: housing; 11: first shell plate; 111: bottom plate; 112: coaming; 113: folded edge; 12: second shell plate; 121: top plate; 122: through hole; 123: recessed groove; 1231: inner circumferential surface; 124: convex; 125: ring wall; 20: heat pipe; 21: open end; 211: flange; 212: outer circumferential surface; 22: closed end; 30: capillary organization; 31: lower capillary organization; 32: upper capillary organization; 321: perforation; 40: working fluid; 50: support column; 60: heat dissipation fin group; A: cavity; S: sealing layer; W: welding product. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it, but the embodiments are not limiting the present application.

[0027] Please refer to Figures 1 to 7 The present application provides a three-dimensional uniform temperature plate joint structure, which mainly comprises a housing 10, a plurality of heat pipes 20, a capillary organization 30 and a working fluid 40.

[0028] Please refer to Figure 5 and Figure 7 As shown in the figure, the housing 10 mainly comprises a first shell plate 11 and a second shell plate 12, the first shell plate 11 and the second shell plate 12 are made of materials with good thermal conductivity such as copper, aluminum, magnesium or their alloys, wherein the first shell plate 11 mainly comprises a bottom plate 111 and a coaming 112 extending upward from the peripheral edge of the bottom plate 111, and the coaming 112 extends outward at one end away from the bottom plate 111.

[0029] The second shell plate 12 mainly comprises a top plate 121, and the second shell plate 12 is tightly connected and sealed with the folded edge 113 of the first shell plate 11 through the top plate 121, so as to form a cavity A between the first shell plate 11 and the second shell plate 12.

[0030] Please refer to Figures 1 to 3 As shown in the figure, a plurality of through holes 122 are arranged at intervals on the inner side of the top plate 121 of the second shell plate 12, a recessed groove 123 is provided around each through hole 122, the recessed groove 123 has an inner circumferential surface 1231, and a convex 124 higher than the outer surface of the top plate 121 is formed at the position corresponding to the recessed groove 123. In addition, a ring wall 125 extends upward around the periphery of each through hole 122.

[0031] Each heat pipe 20 is respectively corresponded to each through hole 122, each heat pipe 20 has an open end 21 and a closed end 22, a flange 211 is arranged on the open end 21, the flange 211 has an outer circumferential surface 212, each flange 211 is respectively accommodated in each recessed groove 123, and the lower surface of the flange 211 is flush with or lower than the inner surface of the top plate 121 of the second shell plate 12. The flange 211 of the present embodiment extends in a diameter expanding manner from the open end 21 of the heat pipe 20, and the flange 211 is vertically arranged with the center line of the heat pipe 20.

[0032] During the joining, the closed end 22 of the heat pipe 20 is passed through the through hole 122 and the ring wall 125 of the second shell plate 12, and the flange 211 is embedded in the recessed groove 123, a welding product W is formed between the outer circumferential surface 212 of the flange 211 and the inner circumferential surface 1231 of the recessed groove 123 by a laser welding device (not shown), so that each heat pipe 20 is joined to the second shell plate 12. The present embodiment is welded by laser brazing, which is not only easy to be combined with computer control, CAD / CAM, etc., but also convenient to be programmed into the production line, and is also a welding method suitable for mechanical arm. During the operation, a high-intensity laser beam is heated to melt the linear solder, and the linear solder is solidified between the inner circumferential surface 1231 of the recessed groove 123 and the outer circumferential surface 212 of the flange 211. After the metal is melted, the welding product W is formed by cooling and crystallization. The welding product W can be joined almost without melting the base material, and the joining strength and speed are twice or more than twice of the general spot welding.

[0033] Secondly, the solder is coated on the heat pipe 20 and the ring wall 127 by soldering or brazing, and each solder is filled between the heat pipe 20 and the ring wall 125 by heating, so as to form a sealing layer S. The solder for soldering is paste zinc, tin, lead, and the solder for brazing is paste copper, aluminum, magnesium.

[0034] Please continue to refer to Figures 4 to 7 As shown, the capillary tissue 30 is arranged in the aforementioned cavity A, and the capillary tissue 30 can be made of metal woven mesh, porous sintered powder, fiber bundle, etc. The shape of the capillary tissue 30 is similar to the shape of the aforementioned shell 10. The capillary tissue 30 mainly includes a lower capillary tissue 31 and an upper capillary tissue 32. The lower capillary tissue 31 is attached to the first shell plate 11 and is fixed to the inner surface of the first shell plate 11 by a heat diffusion welding process. The upper capillary tissue 32 is attached to the second shell plate 12 and is fixed to the inner surface of the second shell plate 12 by a heat diffusion welding process. A plurality of through holes 321 are arranged in the upper capillary tissue 32, and the through holes 321 of the upper capillary tissue 32 are corresponded to the arrangement of the heat pipes 20. The capillary structure of the upper capillary tissue 32 is in contact with the capillary structure of the heat pipes 20.

[0035] The working fluid 40 can be pure water, which is injected into the aforementioned cavity A and subjected to a degassing sealing process, so that the cavity A is formed into a vacuum chamber.

[0036] In an embodiment, the three-dimensional uniform temperature plate joint structure further comprises a plurality of support columns 50, each of which is arranged in the cavity A and stands between the first shell plate 11 and the second shell plate 12.

[0037] In addition, a heat dissipation fin set 60 is sleeved on each heat pipe 20 during use, so as to improve the heat dissipation performance of the overall structure.

[0038] The above-described embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or transformations made by those skilled in the art based on the present application are within the protection scope of the present application. The protection scope of the present application is subject to the claims.

Claims

1. A three-dimensional vapor chamber joint structure, characterized by, The application relates to a heat pipe assembly, comprising: a housing, comprising a first shell plate and a second shell plate tightly sealed with the first shell plate, a cavity being formed between the first shell plate and the second shell plate, a plurality of through holes being provided on the second shell plate, and a recessed groove being provided on the periphery of each through hole; a plurality of heat pipes, each corresponding to a through hole, each heat pipe having an open end, a flange being provided on the open end, each flange being accommodated in the recessed groove, wherein each heat pipe is combined with the second shell plate through the flange and a welding product in the recessed groove; a capillary organization, arranged in the cavity and attached to the housing; and a working fluid, provided in the cavity; the recessed groove has an inner peripheral surface, the flange has an outer peripheral surface, and the welding product is formed between the outer peripheral surface and the inner peripheral surface.

2. The three-dimensional vapor chamber junction structure of claim 1, wherein, The welding product is formed by laser welding.

3. The three-dimensional vapor chamber junction structure of claim 1, wherein, The second shell plate comprises a top plate, and a convexity higher than the outer surface of the top plate is formed at a position corresponding to each recessed groove.

4. The three-dimensional vapor chamber junction structure of claim 3, wherein, The lower surface of the flange is flush with or lower than the inner surface of the top plate of the second shell plate.

5. The three-dimensional vapor chamber junction structure of claim 1, wherein, The flange extends from the open end of the heat pipe in a way of expanding in diameter, and the center line of the flange and the heat pipe are vertically arranged.

6. The three-dimensional vapor chamber junction structure of claim 1, wherein, A ring wall extends around each through hole, and each heat pipe penetrates each ring wall.

7. The three-dimensional vapor chamber junction structure of claim 6, wherein, A sealing layer is further provided between each heat pipe and each ring wall.

8. The three-dimensional vapor chamber junction structure of claim 7, wherein, The sealing layer is formed by soft soldering or hard soldering.

9. The three-dimensional vapor chamber junction structure of claim 1, wherein, A plurality of support columns are further provided in the cavity and vertically arranged between the first shell plate and the second shell plate.

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