Temperature balancing plate and manufacturing method thereof

Abstract

The present invention belongs to the technical field of heat dissipation of electronic components, and in particular, relates to a temperature equalizing plate and a manufacturing method thereof. It solves the defects of the prior art such as unreasonable design. The temperature equalizing plate includes a plate body with a closed liquid-injected negative pressure cavity, in which at least one woven mesh layer formed by weaving a plurality of strip-shaped bodies is arranged, and the strip-shaped bodies are woven at an acute angle in the long-distance condensation direction formed between the heat source area and the condensation area of ​​the plate body; at least one woven mesh layer is provided on the at least one woven mesh layer, which is distributed in the thickness direction of the plate body and formed by a plurality of mutually spaced or connected unit support water collection parts, and the unit support water collection parts are claw-shaped structures; and a spindle water collection structure is provided on the strip-shaped body and / or the unit support water collection part. Advantages of the present application: reducing flow resistance and improving heat dissipation performance.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic component heat dissipation, and in particular relates to a temperature homogenizing plate and a manufacturing method thereof. Background Art

[0002] In recent years, electronic components have shown an increasing trend of miniaturization and high power consumption. How to solve the problem of performance degradation caused by high heat generation of electronic components has attracted widespread attention. Among them, heat pipe two-phase cooling equipment has become an efficient heat transfer device due to the large thermal conductivity generated by phase change.

[0003] The heat spreader is composed of a closed container, a capillary structure and a working fluid. To ensure that the heat spreader has efficient heat exchange performance, the outer shell is usually made of a material with high thermal conductivity, and a liquid wick is attached around the inner wall. To meet the pressure resistance requirements, some heat spreaders are designed with solid columns, sintered columns or liquid wicks attached to the outer surface of the solid column to form a sintered ring. When heat is applied to the bottom of the heat spreader, the liquid evaporates as the heat increases, and the steam rises to the top of the container to condense, and relies on the liquid wick to return to the evaporation surface to form a cycle. Compared with traditional heat pipes, the axial dimension of the heat spreader is greatly shortened, which reduces the flow resistance loss of the working fluid and the axial thermal resistance. At the same time, the radial dimension is increased, which significantly increases the area of ​​the evaporation surface and the condensation surface, and has a smaller diffusion thermal resistance and higher temperature uniformity. This special structure improves the heat dissipation capacity of the heat spreader, increases the reliability of the cooled electronic equipment, and provides a new solution to the problem of temperature uniformity under high heat flow in a limited space.

[0004] The existing temperature evaporating plate relies on the internal liquid absorption core structure to provide the power for the condensate to return, which affects the critical heat flow and thermal performance. The sintered wire mesh type is to sinter the wire mesh on the inner wall of the plate. The pores of the wire mesh can be controlled. It has the advantages of simple structure, convenient manufacturing, and low cost. The disadvantage is that there are gaps between the mesh layers and between the wire mesh and the tube wall, resulting in a large thermal resistance. The wire mesh is mostly made of metal materials, and due to its smooth surface, it has poor hydrophilicity.

[0005] Secondly, the temperature vapor chamber is a surface-to-surface heat transfer. In order to prevent the temperature vapor chamber from expanding due to heat or being flattened and deformed by external forces, multiple support columns are provided. However, the manufacturing process requires additional manufacturing time and cost (support columns). Although the deformation problem is solved, the manufacturing time and cost are increased, and the bottom flatness is not easy to control. Moreover, as the number of support columns increases, the gas flow resistance increases and the heat dissipation effect becomes worse.

[0006] In summary, the defects of the above prior art are:

[0007] Due to the limited arrangement of internal supports and the limitations of etching and stamping accuracy, the gas flow resistance is large and the water vapor in the condensation cavity cannot be effectively captured; and the capillary structure usually uses a mesh copper mesh / stainless steel mesh, and the capillary force is limited, and the liquid cannot be effectively transferred to the evaporation end in the X direction, which often causes dry burning. Summary of the invention

[0008] The purpose of the present invention is to provide a temperature equalizing plate and a manufacturing method thereof that can solve the above technical problems.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] The temperature equalizing plate comprises a plate body having a closed liquid-injected negative pressure cavity, wherein at least one woven mesh layer formed by weaving a plurality of strip-shaped bodies is arranged in the closed liquid-injected negative pressure cavity, and the strip-shaped bodies are woven at an acute angle in the long-distance condensation direction formed between the heat source area and the condensation area of ​​the plate body;

[0011] At least one layer of mesh support water collection layer is provided on at least one layer of the woven mesh layer, which is distributed in the thickness direction of the plate body and formed by a plurality of mutually spaced or connected unit support water collection parts, and the unit support water collection parts are claw-shaped structures; and

[0012] The strip-shaped body and / or the unit support water collection part are provided with a spindle water collection structure.

[0013] In the above-mentioned temperature equalizing plate, the unit support water collecting part includes a plurality of strip support water collecting bodies which are inclined and converged at one end and free at the other end. The plurality of strip support water collecting bodies are inclined and converged at one end to form a convergent end body, and the other end of the strip support water collecting body has an end.

[0014] In the above-mentioned temperature equalizing plate, each of the unit support water collecting parts has at least two strip support water collecting bodies distributed in the long-distance condensation direction; two adjacent unit support water collecting parts are connected in the long-distance condensation direction through the ends of the strip support water collecting bodies.

[0015] In the above-mentioned temperature equalizing plate, at least one of the strip-shaped supporting water collecting bodies is distributed in a short-distance condensation direction perpendicular to the long-distance condensation direction.

[0016] In the above-mentioned temperature equalizing plate, the unit support water collection part is any one of a V-shape and an umbrella-rib shape and is distributed in an array on the woven mesh layer, and the mesh hole diameter of the grid support water collection layer is larger than the mesh hole diameter of the woven mesh layer.

[0017] In the above-mentioned temperature equalizing plate, any one of the end portion and the converging end portion body contacts the woven mesh layer, and the other one contacts the closed liquid-injected negative pressure chamber.

[0018] As a second solution, in the above-mentioned temperature equalizing plate, in the thickness direction of the plate body, the grid-supported water collecting layer has two layers and is symmetrically distributed, wherein the unit-supported water collecting portion of one layer of the grid-supported water collecting layer contacts the woven mesh layer, and the unit-supported water collecting portion of the other layer of the grid-supported water collecting layer contacts the closed liquid injection negative pressure chamber.

[0019] As a third solution, in the above-mentioned temperature equalizing plate, two layers of spaced woven mesh layers are provided in the closed liquid injection negative pressure chamber, the converging end body of the unit supporting water collecting part away from the end is in contact with one of the woven mesh layers, and the end of the unit supporting water collecting part is in contact with the other woven mesh layer.

[0020] As a fourth scheme, in the above-mentioned temperature equalizing plate, two layers of spaced woven mesh layers are provided in the closed liquid-injected negative pressure cavity, a layer of the grid-supported water-collecting layer is provided on each layer of the woven mesh layer, and the two layers of the grid-supported water-collecting layers are symmetrically distributed in the thickness direction of the plate body.

[0021] In the above-mentioned temperature equalizing plate, the spindle water collecting structure comprises a plurality of spindle bodies distributed along the strip-shaped supporting water collecting body and / or the axial direction of the strip-shaped body and at intervals, and a capillary structure is provided on the strip-shaped body, the unit supporting water collecting part and the spindle body.

[0022] The present application also provides a method for manufacturing a temperature homogenizing plate, the manufacturing method comprising the following steps:

[0023] S10, obtaining a woven mesh layer on at least one of the two cover plates by 3D printing, wherein the woven mesh layer is formed by printing and weaving a plurality of strips with spindle water collection structures at an acute angle in the long-distance condensation direction;

[0024] S20, obtaining a plurality of claw-shaped unit support water collection parts on the woven mesh layer of S10 by 3D printing, wherein the plurality of unit support water collection parts form a grid support water collection layer, and the unit support water collection parts are in contact with the woven mesh layer and a spindle water collection structure is formed on the unit support water collection parts by 3D printing;

[0025] S30, on the basis of S20, combining the two cover plates to form a plate body having a liquid injection cavity inside, wherein the plate body has a first end and a second end in the long-distance condensation direction, a first opening communicating with the liquid injection cavity is provided at the first end, and a second opening communicating with the liquid injection cavity is provided at the second end;

[0026] S40, injecting liquid into the first opening of S30, connecting the second opening to negative pressure exhaust, and closing the first opening and the second opening to obtain a closed liquid-injected negative pressure cavity, that is, obtaining a temperature equalizing plate.

[0027] Compared with the existing technology, the advantages of this application are:

[0028] The long-distance condensation direction formed by the strips between the heat source area and the condensation area of ​​the plate is woven at an acute angle, and combined with the spindle water collection structure, the capillary driving force of the long-distance condensation direction can be greatly improved, thereby greatly improving the heat dissipation performance.

[0029] The grid-supported water collection layer adopts a claw-shaped unit-supported water collection part, which can not only increase the support effect, but also significantly reduce the gas flow resistance. At the same time, combined with the spindle water collection structure, it utilizes the surface energy gradient difference to drive small droplets to move to the wettable area with higher surface energy, and directionally captures the water vapor in the cavity and condenses it, and then transfers it to the woven mesh layer, which greatly improves the water collection capacity to meet a wider range of terminal needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the temperature equalizing plate provided by the present invention;

[0031] Figure 2 It is a schematic diagram of the longitudinal cross-sectional structure of the temperature homogenizing plate provided by the present invention in the long-distance condensation direction;

[0032] Figure 3 It is a partial enlarged schematic diagram of the internal structure of the temperature homogenizing plate provided by the present invention after the plate body is removed;

[0033] Figure 4 yes Figure 3 Schematic diagram of the structure viewed from above;

[0034] Figure 5 yes Figure 3 A schematic diagram of a top view structure;

[0035] Figure 6 It is a schematic diagram of the local structure of the strip body provided by the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of a strip-shaped body provided by the present invention after partial magnification under a microscope;

[0037] Figure 8 It is a schematic diagram of the local structure of a strip-shaped body provided with a spindle body provided by the present invention;

[0038] Fig. 9 This is a schematic diagram of the changing state of the strip-shaped body water collection provided by the present invention;

[0039] Fig.10It is a schematic diagram of various spindle structures provided by the present invention;

[0040] Fig.11 This is a schematic diagram of the structure of a unit support water collection part having 8 strip-shaped support water collection bodies provided by the present invention;

[0041] Fig.12 It is a structural schematic diagram of embodiment 1 provided by the present invention;

[0042] Fig.13 It is a structural schematic diagram of Embodiment 2 provided by the present invention;

[0043] Fig.14 It is a structural schematic diagram of Example 3 provided by the present invention.

[0044] In the figure, the plate body 1, the closed liquid injection negative pressure chamber 1a, the heat source area 1b, the condensation area 1c, the cover plate 10, the first opening 11, the second opening 12, the woven mesh layer 2, the strip body 20, the mesh hole 21, the grid support water collection layer 3, the unit support water collection part 30, the strip support water collection body 300, the end 300a, the converging end body 300b, the grid hole 31, the spindle water collection structure 4, the spindle body 40, the long-distance condensation direction X, the short-distance condensation direction Y, and the acute angle a. DETAILED DESCRIPTION

[0045] The following are specific embodiments of the invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0046] like Figure 1 As shown, the temperature equalizing plate is a VC plate, which is in the shape of a flat rectangular parallelepiped, with a long-distance condensation direction X formed between the heat source area 1b and the condensation area 1c, and a short-distance condensation direction Y perpendicular to the long-distance condensation direction X.

[0047] The water collection performance of the long-distance condensation direction X directly determines the heat dissipation performance of the temperature vapor chamber. Therefore, based on the defects of the existing solutions, this embodiment discloses the following solutions:

[0048] like Figure 1 and Figure 2 As shown, the temperature equalizing plate includes a plate body 1 having a closed liquid-filled negative pressure cavity 1a, in which a vaporizable liquid, such as water or the like, is injected. Figure 2-Figure 4 As shown, at least one woven mesh layer 2 formed by weaving a plurality of strip-shaped bodies 20 is arranged in the closed liquid injection negative pressure chamber 1a, and the strip-shaped bodies 20 are woven at an acute angle a in the long-distance condensation direction X formed between the heat source area 1b and the condensation area 1c of the plate body 1. The mesh 21 of the woven mesh layer 2 woven at the acute angle a is a rhombus, that is, it has two acute angles in the long-distance condensation direction X and two obtuse angles in the short-distance condensation direction Y.

[0049] From the perspective of directional water collection performance in the long-distance condensation direction X, due to the weaving at an acute angle a, the strip body 20 and the long-distance condensation direction X form an angle of 1 / 2 of the acute angle a, and a spindle water collection structure 4 with a bionic structure is provided on the strip body 20, which can enhance the capillary driving force of the long-distance condensation direction X. In other words, the strip body 20 provided with the spindle water collection structure 4 is understood as a structure similar to spider silk, such as Figure 6-Figure 8 As shown, the spindle water collection structure 4 includes a plurality of spindle bodies 40 distributed along the axial direction of the strip body 20 and at intervals, as shown in FIG. Figure 6 and Figure 7 As shown, a capillary structure is provided in the axial direction of the strip body 20 and the spindle body 40, and the capillary structure includes a capillary groove and / or a capillary protrusion to further improve the capillary driving force, such as Figure 6 The "M" segment is intercepted and the water collection example is enlarged. At this time, the strip 20 has a bionic microscopic spindle 40 and joint structure. The principle is: the water absorption ability of spider silk is attributed to a unique fiber structure composed of periodic spindles 40 and joints. The periodic spindles 40 are composed of randomly disordered nanofibers, and the joints are composed of neatly arranged nanofibers. In a humid environment, the spider joint structure is first reconstructed on the spider silk, and then water droplets are condensed on the reconstructed spider silk. Then, the tiny water droplets move toward the spindle joints under the action of the driving force to achieve water collection. A section of spider silk fiber is a microstructure composed of spindle nodes and joints. The force that drives the movement of small droplets on the surface of spider silk fibers is generated by the surface free energy gradient and the Laplace pressure difference. The surface energy gradient can be caused by differences in surface chemical composition or surface roughness, thereby driving small droplets to move to wettable areas with higher surface energy. This study does not rely on external forces, but relies on the gradient of surface structure to drive small droplets for directional collection. As Fig.10 As shown, the strip body 20 (which can also be understood as spider silk) of this embodiment has the shapes of a spindle in the shape of a "single ellipsoid", "double ellipsoid", "ellipsoid with multiple sizes", "single spire" and "single boss".

[0050] The second driving force for directional water movement is due to the spindle 40 geometry of the node, which results in a Laplace pressure difference. Figure 7 As shown, the spindle head can be regarded as composed of two opposing circular and conical materials. The Laplace pressure is much larger at the place of large curvature (node ​​radius r1) than at the place of small curvature (spindle radius r2). Since r1 is smaller than r2, this will cause the Laplace pressure difference in the water droplet to be unbalanced, so that the water droplet moves from the node to the spindle head. The final result is that the surface energy gradient caused by the anisotropic surface structure and the Laplace pressure difference caused by the conical spindle head geometry jointly drive the water droplet from the node to the spindle head.

[0051] The specific examples are as follows: Figure 6 and Figure 8As shown, water vapor condenses into tiny droplets at the joint and on the spindle 40. Due to the change in curvature, the Laplace pressure difference generated makes the tiny droplets have a driving force at the joint, not just on the spindle. The tip has a more obvious curvature change than the ellipsoid. The periodic spindle 40 presents a "large and small" multi-size arrangement, making the three-phase contact line of the largest hanging droplet longer. The tiny droplets at the joint and on the surface of the large spindle 40 will move toward the large spindle 40 and condense into large droplets S1, S3, and S5, while the tiny droplets on the surface of the small spindle 40 and at the joint will move toward the small spindle 40 and condense into small droplets S2 and S4. Since the Laplace pressure at the high curvature part is greater than the Laplace pressure at the low curvature part, the small droplet S4 will converge toward the large droplet S5 to form a droplet S7. As more and more small droplets converge, droplets S1 and S3 gradually become larger. Small droplet S2 will first converge with one of the large droplets, and finally converge with three droplets to form a larger droplet S6. When the gravity of the droplet is greater than the adhesion force, it will drip.

[0052] like Figure 3 As shown, at least one layer of mesh support water collection layer 3 is provided on at least one layer of woven mesh layer 2, which is distributed in the thickness direction of the plate body 1 and formed by a number of unit support water collection parts 30 spaced apart or connected to each other. The unit support water collection part 30 is a claw-shaped structure and each unit support water collection part 30 of at least one layer of mesh support water collection layer 3 has at least one end 300a in contact with the woven mesh layer 2, and a number of unit support water collection parts 30 are distributed in an array on the woven mesh layer 2. Preferably, one unit support water collection part 30 has two to N ends 300a in contact with the woven mesh layer 2. It should be noted at this point that the mesh hole 31 of the mesh support water collection layer 3 has a larger aperture than the mesh hole 21 of the woven mesh layer 2, so as to attach Figure 5 For example, for the sake of convenience, the grid hole 31 is represented as a circular hole 1 that is tangent to the four unit support water collection parts 30, and the mesh hole 21 is represented as a circular hole 2 that is tangent to the four strip bodies 20. The diameter of the circular hole 1 is greater than the diameter of the circular hole 2, and the multiple of the greater is at least twice.

[0053] like Figure 3 and Figure 6 As shown, a spindle water collecting structure 4 is provided on the strip body 20 and / or the unit support water collecting part 30. There are three schemes: the first is that the spindle water collecting structure 4 is provided on the strip body 20; the second is that the spindle water collecting structure 4 is provided on the unit support water collecting part 30; the third is that the spindle water collecting structure 4 is provided on the strip body 20 and the unit support water collecting part 30 respectively. The spindle water collecting structure 4 can be provided on the strip body 20 and / or the unit support water collecting part 30 according to the heat dissipation requirements.

[0054] As a preferred implementation scheme, this embodiment adopts the third scheme.

[0055] Specifically, Figure 3 As shown, the unit support water collecting part 30 of this embodiment is in any one of a V-shape and an umbrella rib shape, such as Figure 3 As shown, it specifically includes a plurality of strip-shaped support water collecting bodies 300 with one end inclined and converged and connected and the other end being free, wherein one end of the plurality of strip-shaped support water collecting bodies 300 is inclined and converged to form a convergent end body 300b, and the other end of the strip-shaped support water collecting body 300 has an end 300a. As one of the schemes of this embodiment, when the woven mesh layer 2 and the mesh support water collecting layer 3 are both one layer, any one of the end 300a and the convergent end body 300b contacts the woven mesh layer 2, and the other contacts the closed liquid injection negative pressure chamber 1a.

[0056] As an extended solution, of course, the end portion 300a and the converging end portion body 300b of the above solution can be swapped.

[0057] For example, when there are two strip-shaped support water collecting bodies 300, a V-shape is formed; when there are at least three strip-shaped support water collecting bodies 300, an umbrella-shaped structure is formed (e.g. Fig.11 ). And one end of a plurality of strip-shaped supporting water collecting bodies 300 is connected and converged to form a convergent end body 300b, similar to forming a conical structure, which can allow water vapor to flow in both the axial and radial directions, and there is only one convergent end body 300b, at this time, the flow resistance can be greatly reduced to improve the heat dissipation performance.

[0058] like Figure 2 , Figure 3 and Fig.11 As shown, specifically, the unit support water collection part 30 has 2-N ends 300a, such as two, three, four and five, etc., and the number is not exhaustive. The end 300a contacts the woven mesh layer 2, and the unit support water collection part 30 drains the collected condensed water to each end 300a at the converging end body 300b of the unit support water collection part 30 away from the woven mesh layer 2, and is finally transported by the woven mesh layer 2 in the long-distance condensation direction X. From the perspective of flow resistance, the claw-shaped unit support water collection part 30 of this embodiment can at least effectively reduce the flow resistance compared to the space of the same volume, and combined with the spindle water collection structure 4 provided on the unit support water collection part 30, it can effectively capture water vapor to improve the water collection performance and heat dissipation performance.

[0059] The structure of the spindle water collecting structure 4 provided on the unit support water collecting portion 30 can refer to the specific structure of the spindle water collecting structure 4 provided on the strip body 20 as described above. Figure 3As shown, the spindle water collection structure 4 comprises a plurality of spindle bodies 40 which are spaced apart and arranged along the axial direction of the strip-shaped supporting water collection body 300. The spindle bodies 40 may be in any one of the following shapes: a spherical spindle body, an ellipsoidal spindle body, a pointed spindle body and a biconical spindle body.

[0060] Preferred solutions, such as Fig.10 As shown, a plurality of spindles 40 with large diameters and a plurality of spindles 40 with small diameters can be arranged in the axial direction of the strip-shaped support water collection body 300, and there is at least one spindle 40 with small diameters between two adjacent spindles with large diameters. Example: a plurality of large spherical spindles and a plurality of small spherical spindles can be arranged in the axial direction of the strip-shaped support water collection body 300, and there is a small spherical spindle between two adjacent large spherical spindles. The diameter of the large spherical spindle is at least twice that of the small spherical spindle.

[0061] like Figure 2 As shown, it can be seen from the longitudinal cross-section of the plate body 1 along the long-distance condensation direction X that a conical or approximately conical first space is formed inside the unit support water collection part 30 itself, and a conical or approximately conical second space is formed between the unit support water collection part 30 and the closed liquid injection negative pressure chamber 1a. The first space and the second space are connected at the connecting port between two adjacent inclined strip-shaped support water collection bodies 300 of the unit support water collection part 30. Compared with the array-type distributed support column solution in the prior art, this embodiment can greatly improve the water collection performance and greatly reduce the flow resistance.

[0062] Secondly, a capillary structure is provided on the unit support water collecting part 30 and the spindle 40. The capillary structure design on the woven mesh layer 2 may be referred to.

[0063] Furthermore, if Figure 5 As shown, each unit support water collection part 30 has at least two strip support water collection bodies 300 distributed in the long-distance condensation direction X; two adjacent unit support water collection parts 30 are connected in the long-distance condensation direction X through the end 300a of the strip support water collection body 300. At this time, it can be understood that a second space in a conical or approximately conical shape is formed between two adjacent unit support water collection parts 30. Figure 1 , Figure 3 and Figure 5 As shown, when a unit support water collection part 30 has at least three strip support water collection bodies 300, at least one strip support water collection body 300 is distributed in the short-distance condensation direction Y perpendicular to the long-distance condensation direction X. At this time, the unit support water collection part 30 combined with the spindle water collection structure 4 forms a spider web structure, but the difference from the spider web is that the unit support water collection part 30 of this embodiment does not have a radial water collection body radially surrounding the strip support water collection body 300, so this embodiment can greatly reduce the flow resistance.

[0064] By means of at least two strip-shaped supporting water collecting bodies 300 distributed in the long-distance condensation direction X, the single unit supporting water collecting part 30 can have the drainage function in the long-distance condensation direction X respectively.

[0065] In summary, the grid-supported water-collecting layer 3 formed by the unit-supported water-collecting portion 30 of the present embodiment not only improves the support stability, but also reduces the flow resistance. The spindle water-collecting structure 4 also adopts a bionic microscopic spindle 40 and a joint structure similar to spider silk. The gas phase liquid is captured and directed to the capillary network of the liquid phase. In the entire spider silk-like water-collecting process, the spindle 40 acts as a condensation point in the initial stage, and then acts as a gathering point for small water droplets at these nodes. This is because the spindle is more hydrophilic than the node and has a higher apparent surface energy.

[0066] For example, the strip-shaped supporting water collecting body 300 of the present embodiment can be any one of a straight strip-shaped body, a spiral wave-shaped body, a semicircular strip-shaped body and an arc-shaped line-shaped body.

[0067] When the temperature equalizing plate of this embodiment is in operation, water vapor is generated due to the evaporation of the internal liquid. At this time, the unit support water collecting part 30 with a claw-shaped structure captures the water vapor and forms gradually increasing water droplets in the axial direction of the strip support water collecting body 300. When the water droplets are directed onto the woven mesh layer 2, the woven mesh layer 2 woven at an acute angle a forces most of the water to flow in the long-distance condensation direction X, so that the heat source area 1b and the condensation area 1c of the plate body 1 can exchange heat to achieve the purpose of heat dissipation.

[0068] In addition, the number of layers of the woven mesh layer 2 is 1-2 layers, and the number of layers of the grid support water collection layer 3 is 1-2 layers. Figure 1 As shown, the above implementation content is a solution of one layer of woven mesh layer 2 and one layer of grid support water collection layer 3. Further, in the thickness direction of the plate body 1, the convergence end body 300b of the unit support water collection part 30 away from the end 300a contacts the inner wall of the closed liquid injection negative pressure chamber 1a away from the woven mesh layer 2.

[0069] Example 1, based on the above implementation, Fig.12 As shown, this embodiment further introduces a temperature equalizing plate with two layers of grid-supported water-collecting layers 3, specifically as follows: in the thickness direction of the plate body 1, the grid-supported water-collecting layers 3 have two layers and are symmetrically distributed, wherein a unit-supported water-collecting portion 30 of one layer of the grid-supported water-collecting layer 3 contacts the woven mesh layer 2, and at least one end 300a of a unit-supported water-collecting portion 30 of another layer of the grid-supported water-collecting layer 3 contacts the inner wall of the closed liquid injection negative pressure chamber 1a on the side away from the woven mesh layer 2.

[0070] The two layers of grid-supported water-collecting layers 3 are symmetrically distributed, and the unit-supported water-collecting parts 30 of the two layers of grid-supported water-collecting layers 3 are also symmetrically distributed, and the symmetrically distributed unit-supported water-collecting parts 30 are connected together through the convergent end body 300b. For example, the unit-supported water-collecting parts 30 of one layer of grid-supported water-collecting layers 3 are defined as the first unit-supported water-collecting parts, and the unit-supported water-collecting parts 30 of another layer of grid-supported water-collecting layers 3 are defined as the second unit-supported water-collecting parts, and the convergent end body 300b of the first unit-supported water-collecting parts and the convergent end body 300b of the second unit-supported water-collecting parts are connected together. The advantage of the above design is that, in terminal applications, better water collection performance and heat dissipation performance can be formed.

[0071] Example 2, based on the above implementation, Fig.13 As shown, the present embodiment further introduces two layers of woven mesh layers 2, i.e., two layers of spaced woven mesh layers 2 are arranged in the closed liquid injection negative pressure chamber 1a, the converging end body 300b of the unit supporting water collecting part 30 away from the end 300a contacts one of the layers of woven mesh layers 2, and the unit supporting water collecting part 30 respectively has at least one end 300a contacting another layer of woven mesh layer 2.

[0072] The cooperation of two layers of woven mesh layers 2 and one layer of mesh support water collection layer 3 can further enhance the capillary driving force in the long-distance condensation direction X.

[0073] Embodiment 3, based on embodiment 1, as Fig.14 As shown, this embodiment further introduces two layers of woven mesh layers 2, that is, two layers of spaced woven mesh layers 2 are arranged in the closed liquid injection negative pressure chamber 1a, and a layer of grid-supported water-collecting layer 3 is provided on each layer of the woven mesh layer 2, and the two layers of grid-supported water-collecting layers 3 are symmetrically distributed in the thickness direction of the plate body 1.

[0074] Embodiment 4, based on the above embodiment, as Figure 1-Figure 11 As shown, taking a woven mesh layer 2 and a grid support water collection layer 3 as an example, this embodiment further discloses a method for manufacturing a temperature homogenizing plate, which includes the following steps:

[0075] S10, a woven mesh layer 2 is obtained on at least one of the two cover plates 10 by 3D printing (for example, SML additive printing process), and the woven mesh layer 2 is formed by printing and weaving a plurality of strips 20 having spindle water collection structures 4 at an acute angle a in a long-distance condensation direction X;

[0076] Specifically, the SLM printing method is adopted, the spot diameter is 20μm, the power is 90-110W, the laser scanning speed is 7000-9000mm / s, the powder material is SUS / TC4 / Cu, the powder diameter is 5-25um, and the powder layer thickness is 20um.

[0077] S20, obtaining a plurality of claw-shaped unit support water collection parts 30 on the woven mesh layer 2 of S10 by 3D printing, wherein the plurality of unit support water collection parts 30 form a grid support water collection layer 3, and the unit support water collection parts 30 are in contact with the woven mesh layer 2 and a spindle water collection structure 4 is formed on the unit support water collection parts 30 by 3D printing;

[0078] S30, on the basis of S20, combining two cover plates 10 to form a plate body 1 having a liquid injection cavity inside, wherein the plate body 1 has a first end and a second end in the long-distance condensation direction X, a first opening 11 communicating with the liquid injection cavity is provided at the first end, and a second opening 12 communicating with the liquid injection cavity is provided at the second end;

[0079] The first opening 11 and the second opening 12 designed in the long-distance condensation direction X can prevent the injected liquid from being drawn away, thereby improving the stability of the liquid injection.

[0080] S40, injecting liquid into the first opening 11 of S30, connecting the second opening 12 to negative pressure exhaust, and closing the first opening 11 and the second opening 12 to obtain a closed liquid-injected negative pressure chamber 1a, that is, obtaining a temperature equalizing plate.

[0081] The method of this embodiment is not only environmentally friendly, but also greatly reduces the complexity of the process to improve production efficiency. Specifically, the SLM additive manufacturing method is used for one-piece molding, from powder to finished product, with good sealing effect; at the same time, a spider silk-like bionic micro spindle and joint structure of the support structure and capillary structure are constructed. The materials include SUS / titanium alloy / copper alloy / magnesium alloy, etc.

[0082] Secondly, the new liquid injection structure design leaves a first opening 11 and a second opening 12 on the left and right sides, which can facilitate the cleaning of powder after 3D printing and the injection of liquid. After the first opening 11 is injected, the air is pumped out at the second opening 12, which can effectively reduce the injection liquid from being pumped out.

[0083] Example 5: A housing obtained by applying the above-mentioned temperature balancing plate. The housing is, for example, a housing of a 3C product.

[0084] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A temperature equalizing plate, comprising a plate body (1) having a closed liquid-filled negative pressure cavity (1a), characterized in that: At least one woven mesh layer (2) formed by weaving a plurality of strip-shaped bodies (20) is arranged in the closed liquid injection negative pressure chamber (1a), and the strip-shaped bodies (20) are woven at an acute angle (a) to the long-distance condensation direction (X) formed between the heat source area (1b) and the condensation area (1c) of the plate body (1); at least one grid support water collection layer (3) is arranged on the at least one woven mesh layer (2) and is distributed in the thickness direction of the plate body (1) and is formed by a plurality of mutually spaced or connected unit support water collection parts (30), and the unit support water collection parts (30) are any one of a claw-shaped structure, a V-shaped structure and an umbrella-shaped structure; and a spindle water collection structure (4) is arranged on the strip-shaped body (20) and / or the unit support water collection part (30).

2. The temperature equalizing plate according to claim 1, characterized in that: The unit support water collection part (30) comprises a plurality of strip-shaped support water collection bodies (300) having one end inclined and convergently connected and the other end being free, wherein one end of the plurality of strip-shaped support water collection bodies (300) is inclined and convergently connected to form a convergent end body (300b), and the other end of the strip-shaped support water collection body (300) has an end (300a).

3. The temperature equalizing plate according to claim 2, characterized in that: Each of the unit support water collection parts (30) has at least two strip support water collection bodies (300) distributed in the long-distance condensation direction (X); two adjacent unit support water collection parts (30) are connected in the long-distance condensation direction (X) via the ends (300a) of the strip support water collection bodies (300).

4. The temperature homogenizing plate according to claim 1, characterized in that: The unit support water collection parts (30) are distributed in an array on the woven mesh layer (2), and the mesh holes (31) of the mesh support water collection layer (3) have a larger aperture than the mesh holes (21) of the woven mesh layer (2).

5. The temperature homogenizing plate according to claim 2, characterized in that: Any one of the end portion (300a) and the converging end portion body (300b) contacts the woven mesh layer (2), and the other contacts the closed liquid injection negative pressure chamber (1a).

6. The temperature equalizing plate according to claim 2, characterized in that: In the thickness direction of the plate body (1), the grid-supported water-collecting layer (3) has two layers and is symmetrically distributed, wherein the unit-supported water-collecting portion (30) of one layer of the grid-supported water-collecting layer (3) contacts the woven mesh layer (2), and the other layer of the grid-supported water-collecting layer (3) contacts the closed liquid injection negative pressure chamber (1a).

7. The temperature equalizing plate according to claim 2, characterized in that: Two spaced woven mesh layers (2) are provided in the closed liquid injection negative pressure chamber (1a); the converging end body (300b) of the unit support water collection part (30) contacts one of the woven mesh layers (2), and the end (300a) of the unit support water collection part (30) contacts the other woven mesh layer (2).

8. The temperature equalizing plate according to claim 2, characterized in that: Two layers of the woven mesh layers (2) are arranged at intervals in the closed liquid injection negative pressure chamber (1a), a layer of the grid support water collection layer (3) is arranged on each layer of the woven mesh layer (2), and the two layers of the grid support water collection layers (3) are symmetrically distributed in the thickness direction of the plate body (1).

9. The temperature equalizing plate according to claim 2, characterized in that: The spindle water collection structure (4) comprises a plurality of spindle bodies (40) distributed axially and at intervals along the strip-shaped supporting water collection body (300) and / or the strip-shaped body (20), and capillary structures are provided on the strip-shaped body (20), the unit supporting water collection portion (30) and the spindle bodies (40).

10. The method for manufacturing a temperature homogenizing plate according to any one of claims 1 to 9, characterized in that: The manufacturing method comprises the following steps: S10, a woven mesh layer (2) is obtained on at least one of the two cover plates (10) by 3D printing, and the woven mesh layer (2) is formed by printing and weaving a plurality of strips (20) having spindle water collection structures (4) at an acute angle (a) to a long-distance condensation direction (X); S20, obtaining a plurality of claw-shaped unit support water collection parts (30) on the woven mesh layer (2) of S10 by 3D printing, wherein the plurality of unit support water collection parts (30) form a grid support water collection layer (3), and a spindle water collection structure (4) is formed on the unit support water collection part (30) by 3D printing; S30. On the basis of S20, two cover plates (10) are combined to form a plate body (1) having a liquid injection cavity therein, wherein the plate body (1) has a first end and a second end in the long-distance condensation direction (X), a first opening (11) communicating with the liquid injection cavity is provided at the first end, and a second opening (12) communicating with the liquid injection cavity is provided at the second end; S40, injecting liquid into the first opening (11) of S30, connecting the second opening (12) to a negative pressure exhaust, and closing the first opening (11) and the second opening (12) to obtain a closed liquid-injected negative pressure chamber (1a), thereby obtaining a temperature equalizing plate.

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