Vapor chamber, dendritic capillary structure of vapor chamber and manufacturing method of vapor chamber

Abstract

The invention relates to a vapor chamber, a dendritic capillary structure thereof and a manufacturing method, the vapor chamber comprises a vapor chamber body, a plurality of dendritic capillary structures and a working fluid, the vapor chamber body comprises a hollow shell and a capillary core layer covering the inner wall surface of the hollow shell; each branch-shaped capillary structure is provided with a capillary base and a plurality of capillary branches, one surface of each capillary base is connected to the capillary core layer in a sintering manner, the other surface of each capillary base is provided with a convex arc part, and the plurality of capillary branches are integrally formed by extending from the convex arc parts; a working fluid is filled into the hollow housing. Therefore, the plurality of capillary branches and the convex arc parts can increase the heat dissipation surface area of the dendritic capillary structure, so that the uniform temperature plate and the dendritic capillary structure have excellent heat dissipation efficiency.

Description

Technical Field

[0001] The present application relates to a temperature evaporating plate structure and a manufacturing method thereof, and more particularly to a temperature evaporating plate, a dendritic capillary structure thereof and a manufacturing method thereof. Background Art

[0002] The traditional temperature vapor chamber mainly includes a flat sealed shell, a capillary structure formed in the flat sealed shell, and a working fluid filled in the flat sealed shell. The flat sealed shell has a relative heat absorbing surface and a heat releasing surface, and the heat is transferred from the heat absorbing surface to the heat releasing surface by the vapor-liquid phase change of the working fluid to achieve the heat dissipation effect.

[0003] However, as the temperature vapor chamber pursues thinning, the capillary structure heat dissipation surface area inside the flat sealed shell will be insufficient, resulting in a large evaporation superheat (Superhrat) of the working fluid, which in turn greatly reduces the heat exchange effect inside the temperature vapor chamber, making thin temperature vapor chambers generally have problems such as poor heat dissipation efficiency.

[0004] In view of this, the applicant has conducted intensive research on the above-mentioned prior art and applied theoretical knowledge to try its best to solve the above-mentioned problems, which has become the development goal of the applicant. Summary of the invention

[0005] The present application provides a temperature averaging plate, a dendritic capillary structure thereof and a manufacturing method thereof, which utilizes a plurality of capillary branches and convex arc portions to increase the heat dissipation surface area of ​​the dendritic capillary structure, so that the temperature averaging plate and the dendritic capillary structure have excellent heat dissipation efficiency.

[0006] In an embodiment of the present application, the present application provides a temperature equalizing plate, including: a temperature equalizing plate body, including a hollow shell and a capillary core layer covering the inner wall of the hollow shell; a plurality of branch-like capillary structures, each branch-like capillary structure having a capillary base and a plurality of capillary branches, one side of the capillary base being sintered and connected to the capillary core layer and the other side having a convex arc portion, and a plurality of capillary branches extending from the convex arc portion as an integral unit; and a working fluid, filled into the hollow shell.

[0007] In one embodiment, each convex arc portion is a circular arc surface, and a plurality of capillary branches are integrally extended and formed on the circular arc surface in a radially parallel manner.

[0008] In one embodiment, the hollow shell includes an upper shell and a lower shell assembled together, the capillary core layer is divided into an upper capillary core layer coated on the inner wall of the upper shell and a lower capillary core layer coated on the inner wall of the lower shell, and the capillary base is sintered and connected to the lower capillary core layer on one side away from the multiple capillary branches.

[0009] In one embodiment, the capillary branches extend toward the upper capillary core layer, and the capillary branches can be stopped at the upper capillary core layer and have a diameter greater than that of the remaining capillary branches.

[0010] In one embodiment, each capillary base has a concave arc portion formed inside the convex arc portion and a ring segment formed on the outer periphery of the concave arc portion on a side connected to the lower capillary core layer, each ring segment is sintered and connected to the lower capillary core layer, and each concave arc portion is a hemispherical groove.

[0011] In an embodiment of the present application, the present application provides a branch-like capillary structure, including: a capillary base having a convex arc portion; and a plurality of capillary branches extending integrally from the convex arc portion.

[0012] In one embodiment, each convex arc portion is a circular arc surface, and a plurality of capillary branches are integrally extended and formed on the circular arc surface in a radially parallel manner.

[0013] In one embodiment, the capillary branches extend upward and have a diameter greater than the diameter of the remaining capillary branches.

[0014] In one embodiment, a surface of each capillary base away from the plurality of capillary branches is provided with a concave arc portion formed inside the convex arc portion and a ring segment formed on the outer periphery of the concave arc portion, and each concave arc portion is a hemispherical groove.

[0015] In an embodiment of the present application, the present application provides a method for manufacturing a branch-like capillary structure, the steps of which include: step A): providing a mold and metal powder, the mold having a concave arc containing groove and a bottom wall of the concave arc containing groove being provided with multiple through holes, and filling the concave arc containing groove and the multiple through holes with metal powder; step B): sintering the mold and the metal powder, so that the metal powder filled in the concave arc containing groove is sintered into a capillary base with a convex arc portion on one side, and the metal powder filled in the multiple through holes is sintered into a plurality of capillary branches extending integrally from the convex arc portion; and step C): removing the mold, the capillary base and the multiple capillary branches constitute a branch-like capillary structure.

[0016] In one embodiment, the mold in step C) includes a lower mold and an upper mold stacked up and down, the lower mold is extended with a disk body, the concave arc containing groove and multiple perforations are opened from the top of the disk body, the upper mold is provided with a hollow opening which is sleeved on the disk body, the inner periphery of the hollow opening is in contact with the outer periphery of the disk body, the concave arc containing groove is a circular concave arc groove, multiple perforations are radially recessed from the bottom wall of the concave arc containing groove, the disk body is a conical disk whose outer periphery size gradually decreases in the direction away from the lower mold, and the hollow opening is a conical circular opening whose inner periphery size gradually decreases in the direction away from the lower mold.

[0017] In an embodiment of the present application, the present application provides a method for manufacturing a temperature equalizing plate, the steps of which include: step A): providing a mold and metal powder, the mold having a concave arc containing groove and a bottom wall of the concave arc containing groove being provided with a plurality of through holes, and filling the concave arc containing groove and the plurality of through holes with metal powder; step B): sintering the mold and the metal powder, so that the metal powder filled in the concave arc containing groove is sintered into a capillary base having a convex arc portion on one side, and the metal powder filled in the plurality of through holes is sintered into a plurality of capillary branches extending integrally from the convex arc portion; step C): removing the mold, the capillary base and the plurality of capillary branches forming a branch-like capillary structure; step D): providing an upper shell, a lower shell and another metal powder, and covering the metal powder on the inner surface of the upper shell and the lower shell. wall; step E): providing a plurality of dendritic capillary structures, placing the plurality of dendritic capillary structures on the metal powder covering the lower shell, and allowing each capillary base to be in contact with the metal powder; step F): sintering the upper shell, the lower shell, the metal powder and the plurality of dendritic capillary structures, so that the metal powder covering the upper shell is sintered into an upper capillary core layer, the metal powder covering the lower shell is sintered into a lower capillary core layer, and each capillary base is sintered and connected to the lower capillary core layer; step G): welding the upper shell and the lower shell, so that the upper shell and the lower shell are assembled into a hollow shell; step H): providing a working fluid, and filling the working fluid into the hollow shell; and step I): vacuumizing and sealing the hollow shell.

[0018] In one embodiment, the mold in step C) includes a lower mold and an upper mold stacked up and down, the lower mold is extended with a disk body, the concave arc containing groove and multiple perforations are opened from the top of the disk body, the upper mold is provided with a hollow opening which is sleeved on the disk body, the inner periphery of the hollow opening is in contact with the outer periphery of the disk body, the concave arc containing groove is a circular concave arc groove, multiple perforations are radially recessed from the bottom wall of the concave arc containing groove, the disk body is a conical disk whose outer periphery size gradually decreases in the direction away from the lower mold, and the hollow opening is a conical circular opening whose inner periphery size gradually decreases in the direction away from the lower mold.

[0019] Based on the above, the multiple capillary branches and convex arc portions of the dendritic capillary structure can increase the heat dissipation surface area of ​​the dendritic capillary structure. The multiple dendritic capillary structures sintered on the capillary core layer of the temperature equalizing plate can increase the heat dissipation surface area of ​​the capillary core layer, thereby allowing the working fluid to evaporate with a low superheat degree, and the working fluid can quickly undergo phase changes, thereby greatly enhancing the heat exchange effect of the temperature equalizing plate and the dendritic capillary structure, so that the temperature equalizing plate and the dendritic capillary structure have excellent heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a flow chart of the steps of the method for making a dendritic capillary structure of the present application.

[0021] Figure 2 This is a three-dimensional exploded view of the mold of this application.

[0022] Figure 3 This is a schematic diagram of metal powder being filled into a mold in the present application.

[0023] Figure 4 This is a schematic diagram of the sintering operation of the mold and metal powder in this application.

[0024] Figure 5 This is a three-dimensional schematic diagram of the dendritic capillary structure of the present application.

[0025] Figure 6 This is a flow chart of the steps of the method for manufacturing a temperature homogenizing plate of the present application.

[0026] Figure 7 It is a three-dimensional schematic diagram of the temperature equalizing plate of this application.

[0027] Figure 8 Schematic diagram of the cross section of the temperature equalizing plate of this application.

[0028] Fig. 9 This is a flow chart of the steps of a method for manufacturing a dendritic capillary structure according to another embodiment of the present application.

[0029] Fig.10 This is a schematic diagram of filling metal powder into a mold according to another embodiment of the present application.

[0030] Fig.11 This is a schematic diagram of sintering a mold and metal powder according to another embodiment of the present application.

[0031] Fig.12 This is a schematic diagram of the punching device of the present application trying to punch out a convex arc portion on a capillary base.

[0032] Fig.13 A schematic diagram showing a convex arc portion that has been punched out on a capillary base by a punching device in the present application.

[0033] Fig.14 It is a three-dimensional schematic diagram of another embodiment of the dendritic capillary structure of the present application.

[0034] Fig.15 This is a flow chart of the steps of a method for manufacturing a temperature vapor chamber according to another embodiment of the present application.

[0035] Fig.16 It is a three-dimensional schematic diagram of another embodiment of the temperature vapor chamber of the present application.

[0036] Fig.17 It is a cross-sectional schematic diagram of another embodiment of the temperature vapor chamber of the present application.

[0037] Description of reference numerals:

[0038] 10: Temperature balancing board;

[0039] 1: The main body of the temperature equalizer;

[0040] 11: Hollow shell;

[0041] 111: upper shell;

[0042] 112: lower housing;

[0043] 12: capillary core layer;

[0044] 121: upper capillary core layer;

[0045] 122: lower capillary core layer;

[0046] 2: Dendritic capillary structure;

[0047] 21: capillary base;

[0048] 211: convex arc part;

[0049] 212: Concave arc part;

[0050] 213: Loop segment;

[0051] 22: capillary branches;

[0052] 100: Mould;

[0053] 101: concave arc containing groove;

[0054] 102: Perforation;

[0055] 103: lower membrane tool;

[0056] 1031: Plate body;

[0057] 104: upper mold;

[0058] 1041: hollow opening;

[0059] 106: accommodating groove;

[0060] 200: Metal powder;

[0061] 300: stamping device;

[0062] A~I: steps;

[0063] S1~S9: steps. DETAILED DESCRIPTION

[0064] The detailed description and technical contents of this application will be described as follows with the accompanying drawings. However, the attached drawings are for illustrative purposes only and are not intended to limit this application.

[0065] Please refer to Figures 1 to 8As shown, the present application provides a temperature averaging plate, its dendritic capillary structure and a manufacturing method. The temperature averaging plate 10 mainly includes a temperature averaging plate body 1 and a plurality of dendritic capillary structures 2. The dendritic capillary structure 2 mainly includes a capillary base 21 and a plurality of capillary branches 22.

[0066] like Figure 1 As shown, the steps of the method for making the dendritic capillary structure 2 of the present application are as follows: Figure 1 Step A and Figures 2 to 3 As shown, a mold 100 and metal powder 200 are provided. The mold 100 has a concave arc containing groove 101 and a plurality of through holes 102 are provided on the bottom wall of the concave arc containing groove 101 . The metal powder 200 is filled in the concave arc containing groove 101 and the plurality of through holes 102 .

[0067] Among them, the mold 100 includes a lower mold 103 and an upper mold 104 stacked up and down, the lower mold 103 extends with a disk body 1031, the concave arc groove 101 and multiple through holes 102 are opened from the top of the disk body 1031, the upper mold 104 is provided with a hollow opening 1041 which is sleeved on the disk body 1031, the inner periphery of the hollow opening 1041 is in contact with the outer periphery of the disk body 1031, the concave arc groove 101 is a circular concave arc groove, and multiple through holes 102 are radially recessed from the bottom wall of the concave arc groove 101, the disk body 1031 is a conical disk whose outer periphery size gradually decreases in the direction away from the lower mold 103, and the hollow opening 1041 is a conical circular opening whose inner periphery size gradually decreases in the direction away from the lower mold 103.

[0068] In this way, it is convenient to fill the metal powder 200 into the mold 100 through the hollow opening 1041, and the metal powder 200 can be pushed through the hollow opening 1041 to allow the metal powder 200 to be smoothly filled into each through hole 102. The disk body 1031 is a conical disk, and the hollow opening 1041 is a conical circular opening, which makes it convenient for the lower mold 103 and the upper mold 104 to be stacked up and down or separated from each other.

[0069] The second step is Figure 1 Step B and Figure 4 As shown, the mold 100 and the metal powder 200 are sintered, so that the metal powder 200 filled in the concave arc groove 101 is sintered into a capillary base 21 with a convex arc portion 211 on one side, and the metal powder 200 filled in the multiple through holes 102 is sintered into a plurality of capillary branches 22 extending integrally from the convex arc portion 211.

[0070] The third step is Figure 1 Step C and Figure 5 As shown, the mold 100 is removed, and the capillary base 21 and the plurality of capillary branches 22 form a dendrite-like capillary structure 2 .

[0071] like Figure 6As shown, the steps of the method for manufacturing the temperature homogenizing plate 10 of the present application, the first to third steps are as described above and Figures 1 to 5 As shown, the fourth step is as Figure 6 Step D and Figure 7 As shown, an upper shell 111 , a lower shell 112 and another metal powder (not shown) are provided, and the metal powder is covered on the inner wall surfaces of the upper shell 111 and the lower shell 112 .

[0072] The fifth step is Figure 6 Step E and Figure 7 As shown, a plurality of dendritic capillary structures 2 are provided, and the plurality of dendritic capillary structures 2 are placed on the metal powder covering the lower shell 112 , and each capillary base 21 is in contact with the metal powder.

[0073] The sixth step is Figure 6 Step F and Figures 7 and 8 As shown, the upper shell 111, the lower shell 112, the metal powder 200 and the multiple dendritic capillary structures 2 are placed in a heating furnace (not shown), and the upper shell 111, the lower shell 112, the metal powder 200 and the multiple dendritic capillary structures 2 are sintered, so that the metal powder covering the upper shell 111 is sintered into an upper capillary core layer 121, and the metal powder covering the lower shell 112 is sintered into a lower capillary core layer 122, and each capillary base 21 is sintered and connected to the lower capillary core layer 122.

[0074] The seventh step is Figure 6 Step G and Figures 7 and 8 As shown, the upper shell 111 and the lower shell 112 are welded so that the outer peripheries of the upper shell 111 and the lower shell 112 are welded and assembled into a hollow shell 11. The hollow shell 11 is provided with a degassing port (not shown).

[0075] The eighth step is as follows Figure 6 Step H and Figures 7 and 8 As shown, a working fluid (not shown) is provided and is filled into the hollow shell 11 from a degassing port (not shown).

[0076] The ninth step is Figure 6 Step I and Figures 7 and 8 As shown, the hollow shell 11 is evacuated and sealed, that is, the inside of the hollow shell 11 is evacuated through a degassing port (not disclosed in the figure), and then the degassing port (not disclosed in the figure) is welded and sealed, so that the interior of the hollow shell 11 becomes a closed space, and the upper shell 111, the lower shell 112, the upper capillary core layer 121, the lower capillary core layer 122, the multiple dendritic capillary structures 2 and the working fluid (not disclosed in the figure) together constitute the temperature equalizing plate 10.

[0077] like Figures 7 and 8As shown, the temperature equalizing plate body 1 includes a hollow shell 11 and a capillary core layer 12 coated on the inner wall surface of the hollow shell 11, and the hollow shell 11 includes an upper shell 111 and a lower shell 112 assembled upper and lower. The capillary core layer 12 is divided into an upper capillary core layer 121 coated on the inner wall surface of the upper shell 111 and a lower capillary core layer 122 coated on the inner wall surface of the lower shell 112.

[0078] like Figure 5 , Figures 7 and 8 As shown, each dendrite-like capillary structure 2 has a capillary base 21 and a plurality of capillary branches 22 . The side of the capillary base 21 away from the capillary branches 22 is sintered and connected to the capillary core layer 12 . The other side of the capillary base 21 has a convex arc portion 211 , and the capillary branches 22 are integrally extended from the convex arc portion 211 .

[0079] Furthermore, one of the capillary branches 22 extends toward the upper capillary core layer 121 and can be stopped at the upper capillary core layer 121 , that is, one of the capillary branches 22 extends upward and has a diameter greater than that of the remaining capillary branches 22 , but this is not limiting.

[0080] In addition, the capillary branches 22 of this embodiment are roughly circular columns, but this is not a limitation. The capillary branches 22 can be shaped in any geometric shape. Multiple capillary branches 22 are extended radially and parallelly to form an integral part on a circular arc surface, and each convex arc portion 211 is a circular arc surface.

[0081] like Figure 5 , Figures 7 and 8 As shown, the use state of the temperature equalizing plate 10 and the dendritic capillary structure 2 of the present application, which utilizes multiple capillary branches 22 and the convex arc portion 211 of the dendritic capillary structure 2 to increase the heat dissipation surface area of ​​the dendritic capillary structure 2, and multiple dendritic capillary structures 2 sintered on the capillary core layer 12 of the temperature equalizing plate 10 can increase the heat dissipation surface area of ​​the capillary core layer 12, thereby allowing the working fluid (not disclosed in the figure) to evaporate with a small superheat (Superhrat), and the working fluid (not disclosed in the figure) can quickly undergo phase change, thereby greatly improving the heat exchange effect of the temperature equalizing plate 10 and the dendritic capillary structure 2, so that the temperature equalizing plate 10 and the dendritic capillary structure 2 have excellent heat dissipation efficiency.

[0082] In addition, the plurality of branch-like capillary structures 2 can be used as a plurality of support columns between the upper shell 111 and the lower shell 112 to prevent the upper shell 111 and the lower shell 112 from being compressed and deformed, thereby enhancing the structural strength of the temperature vapor chamber 10 .

[0083] Among them, one of the capillary branches 22 of this embodiment extends upward and has a diameter greater than the diameter of the remaining capillary branches 22, so that the capillary branches 22 extending upward serve as the main supporting column to further enhance the ability of the branch-like capillary structure 2 to support the temperature equalizing plate 10.

[0084] Please refer to Figures 9 to 17 As shown, a temperature averaging plate, a dendritic capillary structure, a method for manufacturing a dendritic capillary structure, and a method for manufacturing a temperature averaging plate according to another embodiment of the present application, Figures 9 to 17 Examples and Figures 1 to 8 The embodiments are roughly the same. Figures 9 to 17 Examples and Figures 1 to 8 The embodiment is different in that the structure of the dendritic capillary structure 2 is different.

[0085] like Fig. 9 As shown, the steps of the method for making the dendritic capillary structure 2 of this embodiment are as follows: Fig. 9 Step S1 and Fig.10 As shown, a mold 100 and metal powder 200 are provided, the mold 100 has a receiving groove 106 and a plurality of through holes 102 are provided on the bottom wall of the receiving groove 106, and the metal powder 200 is filled in the receiving groove 106 and the plurality of through holes 102. The receiving groove 106 is a circular groove.

[0086] The second step is Fig. 9 Step S2 and Fig.11 As shown, the mold 100 and the metal powder 200 are placed in a heating furnace (not shown), and the mold 100 and the metal powder 200 are sintered so that the metal powder 200 filled in the receiving groove 106 is sintered into a capillary base 21, and the metal powder 200 filled in the multiple through holes 102 is sintered into a plurality of capillary branches 22 integrally formed with the capillary base 21.

[0087] The third step is Fig. 9 Step S3 and Figure 12 to Figure 14 As shown, the mold 100 is removed and a punching device 300 is provided. The punching device 300 punches out a convex arc portion 211 on the capillary base 21 , and a plurality of capillary branches 22 are integrally extended from the convex arc portion 211 . The punched capillary base 21 and the plurality of capillary branches 22 form a dendrite-like capillary structure 2 .

[0088] The punching device 300 first punches out a concave arc portion 212 on one side of the capillary base 21 away from the plurality of capillary branches 22 , and forms a convex arc portion 211 on the other side of the capillary base 21 opposite to the concave arc portion 212 .

[0089] like Fig.15 As shown, the steps of the method for manufacturing the temperature homogenizing plate 10 of this embodiment, the first to third steps are as described above and Figures 9 to 14 As shown, the fourth step is as Fig.15 Step S4 and Fig.16 As shown, an upper shell 111 , a lower shell 112 and another metal powder (not shown) are provided, and the metal powder is covered on the inner wall surfaces of the upper shell 111 and the lower shell 112 .

[0090] The fifth step is Fig.15 Step S5 and Fig.16 As shown, a plurality of dendritic capillary structures 2 are provided, and the plurality of dendritic capillary structures 2 are placed on the metal powder covering the lower shell 112 , and each capillary base 21 is in contact with the metal powder.

[0091] The sixth step is Fig.15 Step S6 and Figure 16 to Figure 17 As shown, the upper shell 111, the lower shell 112, the metal powder 200 and the multiple dendritic capillary structures 2 are placed in a heating furnace (not shown), and the upper shell 111, the lower shell 112, the metal powder 200 and the multiple dendritic capillary structures 2 are sintered, so that the metal powder covering the upper shell 111 is sintered into an upper capillary core layer 121, and the metal powder covering the lower shell 112 is sintered into a lower capillary core layer 122, and each capillary base 21 is sintered and connected to the lower capillary core layer 122.

[0092] Among them, each capillary base 21 is provided with a concave arc portion 212 and a ring segment 213 formed on the outer peripheral edge of the concave arc portion 212 on one side sintered and connected to the capillary core layer 12, and each ring segment 213 is sintered and connected to the lower capillary core layer 122, that is, the concave arc portion 212 is formed between the capillary base 21 and the lower capillary core layer 122, and the capillary base 21 and the lower capillary core layer 122 are combined through the ring segment 213, so that the concave arc portion 212 is enclosed into a closed space.

[0093] The seventh step is Fig.15 Step S7 and Figure 16 to Figure 17 As shown, the upper shell 111 and the lower shell 112 are welded so that the outer peripheries of the upper shell 111 and the lower shell 112 are welded and assembled into a hollow shell 11. The hollow shell 11 is provided with a degassing port (not shown).

[0094] The eighth step is as follows Fig.15 Step S8 and Figure 16 to Figure 17 As shown, a working fluid (not shown) is provided and is filled into the hollow shell 11 from a degassing port (not shown).

[0095] The ninth step is Fig.15 Step S9 and Figure 16 to Figure 17 As shown, the hollow shell 11 is evacuated and sealed, that is, the inside of the hollow shell 11 is evacuated through a degassing port (not disclosed in the figure), and then the degassing port (not disclosed in the figure) is welded and sealed, so that the interior of the hollow shell 11 becomes a closed space, and the upper shell 111, the lower shell 112, the upper capillary core layer 121, the lower capillary core layer 122, the multiple dendritic capillary structures 2 and the working fluid (not disclosed in the figure) together constitute the temperature equalizing plate 10.

[0096] like Figure 16 to Figure 17 As shown, the temperature equalizing plate body 1 includes a hollow shell 11 and a capillary core layer 12 coated on the inner wall surface of the hollow shell 11, and the hollow shell 11 includes an upper shell 111 and a lower shell 112 assembled upper and lower. The capillary core layer 12 is divided into an upper capillary core layer 121 coated on the inner wall surface of the upper shell 111 and a lower capillary core layer 122 coated on the inner wall surface of the lower shell 112.

[0097] like Fig.14 , Figure 16 to Figure 17 As shown, each dendrite-like capillary structure 2 has a capillary base 21 and a plurality of capillary branches 22 . The side of the capillary base 21 away from the capillary branches 22 is sintered and connected to the capillary core layer 12 . The other side of the capillary base 21 has a convex arc portion 211 , and the capillary branches 22 are integrally extended from the convex arc portion 211 .

[0098] In addition, each capillary base 21 has a concave arc portion 212 formed inside the convex arc portion 211 and a ring segment 213 formed on the outer periphery of the concave arc portion 212 on one side connected to the capillary core layer 12 , and each ring segment 213 is sintered and connected to the capillary core layer 12 .

[0099] In addition, the capillary branches 22 of this embodiment are rectangular columns, but this is not a limitation. The capillary branches 22 can be shaped in any geometric shape. A plurality of capillary branches 22 are radially and parallelly extended to form a circular arc surface. Each convex arc portion 211 is a circular arc surface, each concave arc portion 212 is a hemispherical groove, and each ring segment 213 is a circular ring. In this way, the same as Figures 1 to 8 Functions and effects of the embodiments.

Claims

1. A temperature equalizing plate, characterized in that: include: The temperature equalizing plate body comprises a hollow shell and a capillary core layer coated on the inner wall surface of the hollow shell; A plurality of dendritic capillary structures, each of which has a capillary base and a plurality of capillary branches, one side of the capillary base is sintered and connected to the capillary core layer and the other side has a convex arc portion, and the plurality of capillary branches are integrally extended from the convex arc portion; and The working fluid is filled into the hollow shell.

2. The temperature equalizing plate according to claim 1, characterized in that: Each of the convex arc portions is a circular arc surface, and the plurality of capillary branches are integrally extended and formed on the circular arc surface in a radially parallel manner.

3. The temperature equalizing plate according to claim 1, characterized in that: The hollow shell comprises an upper shell and a lower shell which are assembled at the upper and lower parts. The capillary core layer is divided into an upper capillary core layer coated on the inner wall surface of the upper shell and a lower capillary core layer coated on the inner wall surface of the lower shell. The capillary base is sintered and connected to the lower capillary core layer on one side away from the multiple capillary branches.

4. The temperature equalizing plate according to claim 3, characterized in that: One of the capillary branches extends toward the upper capillary core layer, and one of the capillary branches can be stopped at the upper capillary core layer and has a diameter greater than that of the remaining capillary branches.

5. The temperature equalizing plate according to claim 3, characterized in that: Each of the capillary bases is provided with a concave arc portion formed inside the convex arc portion and a ring segment formed on the outer periphery of the concave arc portion on a side connected to the lower capillary core layer. Each of the ring segments is sintered and connected to the lower capillary core layer, and each of the concave arc portions is a hemispherical groove.

6. A dendritic capillary structure, characterized in that: include: A capillary base having a convex arc portion; as well as A plurality of capillary branches are integrally extended from the convex arc portion.

7. The dendritic capillary structure according to claim 6, characterized in that: Each of the convex arc portions is a circular arc surface, and the plurality of capillary branches are integrally extended and formed on the circular arc surface in a radially parallel manner.

8. The dendritic capillary structure according to claim 6, characterized in that: One of the capillary branches extends upward and has a diameter greater than that of the remaining capillary branches.

9. The dendritic capillary structure according to claim 6, characterized in that: A surface of each capillary base away from the plurality of capillary branches is provided with a concave arc portion formed inside the convex arc portion and a ring segment formed on the outer periphery of the concave arc portion, and each concave arc portion is a hemispherical groove.

10. A method for making a dendritic capillary structure, comprising the steps of: Step A): providing a mold and metal powder, wherein the mold has a concave arc containing groove and a plurality of through holes are provided from the bottom wall of the concave arc containing groove, and the metal powder is filled in the concave arc containing groove and the plurality of through holes; Step B): sintering the mold and the metal powder, so that the metal powder filled in the concave arc groove is sintered into a capillary base with a convex arc portion on one side, and the metal powder filled in the plurality of through holes is sintered into a plurality of capillary branches extending integrally from the convex arc portion; as well as Step C): removing the mold, the capillary base and the plurality of capillary branches form a dendrite-like capillary structure.

11. The method for manufacturing a dendritic capillary structure as claimed in claim 10, wherein the mold in step C) comprises a lower mold and an upper mold stacked up and down, the lower mold extending with a disk body, the concave arc containing groove and the plurality of through holes opening from the top of the disk body, the upper mold having a hollow opening for sleeved with the disk body, the inner periphery of the hollow opening abutting against the outer periphery of the disk body, the concave arc containing groove being a circular concave arc groove, the plurality of through holes being radially recessed from the bottom wall of the concave arc containing groove, the disk body being a conical disk whose outer periphery size gradually decreases in a direction away from the lower mold, and the hollow opening being a conical circular opening whose inner periphery size gradually decreases in a direction away from the lower mold.

12. A method for manufacturing a temperature homogenizing plate, comprising the steps of: Step A): providing a mold and metal powder, wherein the mold has a concave arc containing groove and a plurality of through holes are provided from the bottom wall of the concave arc containing groove, and the metal powder is filled in the concave arc containing groove and the plurality of through holes; Step B): sintering the mold and the metal powder, so that the metal powder filled in the concave arc groove is sintered into a capillary base with a convex arc portion on one side, and the metal powder filled in the plurality of through holes is sintered into a plurality of capillary branches extending integrally from the convex arc portion; Step C): removing the mold, the capillary base and the plurality of capillary branches form a dendrite-like capillary structure; Step D): providing an upper shell, a lower shell and another metal powder, and covering the inner wall surfaces of the upper shell and the lower shell with the metal powder; Step E): providing a plurality of the dendritic capillary structures, placing the plurality of the dendritic capillary structures on the metal powder covering the lower shell, and allowing each of the capillary bases to be in contact with the metal powder; Step F): sintering the upper shell, the lower shell, the metal powder and the plurality of the dendritic capillary structures, so that the metal powder covering the upper shell is sintered into an upper capillary core layer, the metal powder covering the lower shell is sintered into a lower capillary core layer, and each of the capillary bases is sintered and connected to the lower capillary core layer; Step G): welding the upper shell and the lower shell to form a hollow shell by assembling the upper and lower parts of the upper shell and the lower shell; Step H): providing a working fluid, and injecting the working fluid into the hollow shell; as well as Step I): vacuumizing and sealing the hollow shell.

13. The method for manufacturing a temperature equalizing plate as described in claim 12, wherein the mold in step C) comprises a lower mold and an upper mold stacked up and down, the lower mold extending with a disk body, the concave arc groove and the multiple through holes are opened from the top of the disk body, the upper mold is provided with a through opening for sleeved on the disk body, the inner periphery of the through opening is in contact with the outer periphery of the disk body, the concave arc groove is a circular concave arc groove, the multiple through holes are radially recessed from the bottom wall of the concave arc groove, the disk body is a conical disk whose outer periphery size gradually decreases in the direction away from the lower mold, and the through opening is a conical circular opening whose inner periphery size gradually decreases in the direction away from the lower mold.

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