Vapor chamber reinforcement structure

Abstract

The present invention provides a heat spreader reinforcement structure comprising: an upper cover and a lower cover. The upper cover has a first side and a second side. The first side is recessed toward the second side with at least one groove, and the other side opposite the groove is convex to form at least one protrusion. The lower cover has a third side with a first capillary structure and a fourth side for contacting a heat source. The lower cover and the upper cover are combined to form an airtight chamber filled with a working fluid. The groove and the protrusion on the other side of the groove provide a larger thermal contact surface for a heat transfer element (heat pipe) and a more stable connection. The protrusion on the other side of the groove also enhances the overall structural strength of the heat spreader and increases the contact area for condensation.

Description

Technical Field

[0001] The present invention relates to a heat spreader reinforcement structure, and in particular to a heat spreader reinforcement structure capable of directly combining heat dissipation or heat conduction elements and increasing overall structural strength. Background Art

[0002] Heat pipes and vapor chambers are both common heat conduction elements that utilize two-phase flow changes. Heat pipes mainly provide a far-end horizontal heat conduction, while vapor chambers provide vertical heat conduction between surfaces.

[0003] In order to simultaneously achieve horizontal heat conduction (heat pipe 6) and vertical heat conduction (heat spreader 7), the industry has tried to combine the heat pipe 6 and the heat spreader 7, hoping to achieve both horizontal and vertical heat conduction and improve heat conduction efficiency.

[0004] However, in order to obtain better heat transfer properties, the temperature vapor chamber 7 is mostly made of copper. Therefore, its texture is soft and the structural strength is poor. Therefore, in the traditional combination, the heat pipe 6 and the temperature vapor chamber 7 cannot be directly combined with the heat pipe 6 and the temperature vapor chamber 7. Such direct combination will cause deformation or rupture of the temperature vapor chamber 7 or the heat pipe 6. In addition, the joint part of the temperature vapor chamber 7 and the heat pipe 6 cannot be combined by welding because welding will generate high heat, which will destroy the two-phase flow structure inside the heat pipe 6 and the temperature vapor chamber 7. For example, the working liquid may be burned out or the capillary structure may be detached, thereby causing damage to the temperature vapor chamber and the heat pipe. Therefore, the solution adopted by the existing industry is to first use a base 8 to combine and fix it with the heat pipe 6, and then combine the base 8 with the temperature vapor chamber 7 to achieve the purpose of combining the temperature vapor chamber 7 and the heat pipe 6.

[0005] However, when the heat pipe 6 is combined with the base 8, since the heat pipe 6 has many different shapes, such as round tube, D-shaped tube, flat tube, etc., first refer to Figure 1 The circular heat pipe 6 is fixed to the upper surface (horizontal surface) of the base 8 by welding. Since the heat pipe 6 is a circular tube, the contact between the heat pipe 6 and the base 8 is only a line or point contact, and the thermal contact area is extremely small. In addition to resulting in poor heat conduction efficiency, the bonding strength between the two is also not good.

[0006] Therefore, in order to increase the thermal contact area between the heat pipe 6 and the base 8, a D-shaped tube or a flat tube having at least one flat surface is selected instead of a round tube for assembly with the base 8. Although this increases the thermal contact area between the heat pipe 6 and the base 8, in order to produce a D-shaped or flat heat pipe 6 with a larger thermal contact area with the base 8, the heat pipe 6 must be shaped by external force to obtain a flat surface.

[0007] However, this also leads to another problem: during the shaping process of the heat pipe 6, the heat pipe 6 is easily squeezed and deformed due to the tube wall, thereby destroying the capillary structure of the sintered powder sintered on the inner wall of the heat pipe 6 and reducing the internal vapor channel, thereby causing damage to the internal capillary structure of the heat pipe 6, resulting in a reduction or loss of the two-phase flow heat conduction efficiency of the heat pipe 6.

[0008] See also Figure 2 In order to improve the above-mentioned defects derived from the existing technology, the industry has set an arc-shaped groove 81 on the base 8 that matches the shape of the circular heat pipe 6 for the circular heat pipe 6 to be installed. This solves the problem of insufficient thermal contact area between the heat pipe 6 and the base 8, as well as the problem of damage to the heat pipe 6 during molding.

[0009] In fact, in the existing technology, the heat pipe 6 and the temperature equalizing plate 7 cannot be directly connected to each other. An additional base 8 must be provided to connect the heat pipe 6 and the temperature equalizing plate 7. The addition of the base 8 between the heat pipe 6 and the temperature equalizing plate 7 will form an indirect heat conduction structure between the heat pipe 6 and the temperature equalizing plate 7, rather than a direct heat conduction effect. The temperature equalizing plate 7 cannot directly transfer the absorbed heat to the heat pipe 6, which will greatly reduce the heat transfer efficiency and easily generate thermal resistance at the connection between the base 8 and the heat pipe 6 and the connection between the base 8 and the temperature equalizing plate 7. Therefore, the additional base 8 not only reduces the heat conduction efficiency, but also increases the additional components and the overall volume, and increases the material cost of manufacturing.

[0010] Therefore, how to provide a heat spreader structure that can directly match and combine the heat pipe 6 and the heat spreader 7 without the need for an additional base 8 while generating no thermal resistance, while also improving the overall structural strength of the heat spreader 7, increasing the internal condensation area of ​​the heat spreader 7, and reducing manufacturing costs, has become the primary goal of those in this field. Summary of the Invention

[0011] Thus, in order to effectively solve the above-mentioned problems, the main purpose of the present invention is to provide a vapor chamber reinforcement structure that can increase the structural strength of the vapor chamber and can be directly combined with the heat pipe without the need for additional sets (components).

[0012] To achieve the above-mentioned objectives, the present invention provides a heat sink reinforcement structure, characterized by comprising:

[0013] An upper cover having a first side and a second side, wherein the first side is concavely formed with at least one groove toward the second side, and the groove protrudes toward the second side to form at least one convex body;

[0014] The lower plate has a third side provided with a first capillary structure and a fourth side for contacting a heat source. The upper cover and the lower cover are correspondingly covered to form an airtight chamber filled with a working fluid.

[0015] The heat spreader reinforcement structure further comprises a second capillary structure, which is arranged on the convex surface of the upper cover.

[0016] The heat spreader reinforcement structure, wherein: a plurality of support columns extend from the third side, the plurality of support columns abut against the second side of the upper cover or the plurality of protrusions, and the first capillary structure partially extends on the surface of the plurality of support columns.

[0017] The heat spreader reinforcement structure is characterized in that: the upper cover has a first side and a second side, one end of the groove is connected to the first side, and the other end is connected to the second side.

[0018] The heat spreader reinforcement structure is characterized in that: the protrusion and the groove are arranged corresponding to each other or staggered.

[0019] The heat spreader reinforcement structure, wherein: the convex body is in the shape of a convex strip, a convex ring or a convex cross.

[0020] The design of the groove on one side of the upper cover and the protrusion on the other side of the vapor chamber reinforcement structure of the present invention allows the vapor chamber to be directly connected to a common circular or arc-shaped heat pipe without the use of additional components or fasteners. Furthermore, the protrusion is located at either the corresponding or offset position on the other side of the groove. This not only provides a larger thermal contact surface for the heat transfer element (heat pipe), but also significantly increases the overall structural strength of the vapor chamber and the internal condensation area. This not only prevents deformation and other damage to the vapor chamber during assembly, but also further improves the efficiency of internal vapor-liquid circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of an existing heat dissipation module;

[0022] Figure 2 Schematic diagram of an existing heat dissipation module;

[0023] Figure 3 This is a perspective exploded view of the first embodiment of the heat spreader reinforcement structure of the present invention;

[0024] Figure 4 is a combined cross-sectional view of the first embodiment of the vapor chamber reinforcement structure of the present invention;

[0025] Figure 5 This is a combined cross-sectional view of the first embodiment of the vapor chamber reinforcement structure of the present invention;

[0026] Figure 6 It is a combined cross-sectional view of the second embodiment of the heat spreader reinforcement structure of the present invention.

[0027] Explanation of the reference numerals: upper cover 11; first side 111; second side 112; groove 113; protrusion 114; first side 115; second side 116; lower plate 12; third side 121; fourth side 122; support column 123; airtight chamber 13; working fluid 2; first capillary structure 3; second capillary structure 4; heat pipe 5; heat pipe 6; temperature equalizing plate 7; base 8; groove 81. DETAILED DESCRIPTION

[0028] The above-mentioned objectives and structural and functional characteristics of the present invention will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0029] See also Figure 3 、 Figure 4 、 Figure 5 , is a three-dimensional exploded and assembled cross-sectional view of the heat spreader reinforcement structure of the present invention. As shown in the figure, the heat spreader reinforcement structure of the present invention comprises: an upper cover 11 and a lower plate 12;

[0030] The upper cover 11 has a first side 111 and a second side 112, and the first and second sides 111 and 112 are respectively arranged on the upper and lower sides of the upper cover 11, which are also the outer side and the inner side of the upper cover 11. The first side 111 is recessed with at least one groove 113 toward the second side 112. The groove 113 can be a structure produced (made) by plastic deformation or other mechanical processing methods applied to the first side 111 by external force, and the other side opposite to the groove 113 protrudes to form at least one convex body 114, and the convex body 114 can be a structure protruded by plastic deformation of the first side 111 by external force or other mechanical processing methods. The convex body 114 can be selected to be corresponding to or offset with the groove 113. The groove 113 of this embodiment is selected to be formed by stamping, pressing, forging, or denting, so the convex body 114 can be formed correspondingly on the other side, so the two are correspondingly arranged. Figure 4 As shown, the groove 113 and the protrusion 114 can also be arranged in a staggered manner as shown in FIG. Figure 5 As shown, the protrusion 114 improves the structural strength of the upper cover 11 and increases the condensation area of ​​the second side 112 .

[0031] Of course, the protrusion 114 and the groove 113 can also be arranged in a staggered manner through mechanical processing to form the protrusion 114, and the shape of the protrusion 114 is a convex strip, a convex ring, a convex cross, or a convex body with segmented parts or continuous parts. This embodiment uses the convex strip as an illustrative embodiment, but is not limited to this.

[0032] The upper cover 11 has a first side 115 and a second side 116 . One end of the groove 113 is connected to the first side 115 and the other end is connected to the second side 116 , that is, the groove 113 passes through the first side 115 to the second side 116 .

[0033] The grooves 113 may extend in the transverse direction (as shown in Figures 3 and 4) or the longitudinal direction of the upper cover 11, or extend in both the transverse and longitudinal directions and the grooves 113 are interlaced with each other in the transverse and longitudinal directions. The longitudinal direction of the upper cover 11 is a direction parallel to the first side 115, and the transverse direction is a direction perpendicular to the first side 115.

[0034] The lower plate 12 has a third side 121 and a fourth side 122 , and is correspondingly covered with the upper cover 11 to form an airtight chamber 13 . The airtight chamber 13 is filled with a working fluid 2 . The third side 121 is provided with a first capillary structure 3 .

[0035] The groove 113 provided on the first side 111 of the upper cover 11 is mainly used as a location for accommodating other heat dissipation or heat conducting elements, such as a heat pipe 5. The shape of the groove 113 can be set according to the appearance of the corresponding heat conducting element, so that the heat conducting element can be easily assembled with the groove 113 without the need for other fixing elements or bases. This not only saves manufacturing costs but also prevents the occurrence of thermal resistance caused by the lack of close fit or spacing between the temperature averaging plate and the heat conducting element. The heat conducting element of this embodiment is a heat pipe 5 as an illustrative embodiment but is not limited thereto. The groove 113 provided on the upper cover 11 of the present invention can be used for According to the desired shape of the heat pipe 5, the circular heat pipe 5 is directly arranged in the groove 113 and assembled with the upper cover 11. There is no need to use an additional base to fix the heat pipe 5 in advance. At the same time, the heat pipe 5 and the upper cover 11 can be combined without welding, which not only saves material costs but also prevents the thermal resistance caused by excessive components being combined. At the same time, the maximum contact area between the heat pipe 5 and the groove 113 helps to improve the heat conduction efficiency between the two. In addition, the heat pipe 5 maintains the largest volume of the vapor channel, and the two-phase flow circulation is also better than that of heat pipes 5 with other shapes.

[0036] Therefore, the heat spreader reinforcement structure of the present invention allows the heat spreader to be directly combined with ordinary circular or arc-shaped heat pipes without the need for additional assembly components or fasteners. In addition, since the convex body 114 is formed in a corresponding or offset manner on the other side of the groove 113, the overall structural strength of the heat spreader and the contact area for condensation can be increased. This not only prevents deformation and other damage to the heat spreader during assembly, but also increases the conversion efficiency of the two-phase flow inside the heat spreader, thereby improving the effectiveness of heat conduction.

[0037] See Figure 6, is a cross-sectional view of a second embodiment of the heat spreader reinforcement structure of the present invention. As shown in the figure, part of the structure of this embodiment is the same as that of the first embodiment and will not be described again here. However, this embodiment differs from the first embodiment in that the convex body 114 of the upper cover 11 further has a second capillary structure 4, and the second capillary structure 4 is flatly arranged on the surface of the convex body 114 of the upper cover 11.

[0038] A plurality of support columns 123 extend from the third side 121 of the lower plate 12 . The plurality of support columns 123 abut against the second side 112 of the upper cover 11 or the plurality of protrusions 114 . The first capillary structure 3 partially extends over the surface of the plurality of support columns 123 and is partially connected to the second capillary structure 4 .

[0039] The main purpose of the present invention is to provide a heat spreader structure that can increase structural strength and can be directly combined with heat pipes or other heat dissipation or heat-conducting elements. The groove is formed by applying external force on one side of the heat spreader to cause the upper cover to undergo plastic deformation. The heat dissipation or heat-conducting elements that are assembled correspondingly to each other are directly accommodated in the groove, and the other side of the groove corresponds or is offset to form a convex body, which increases the structural strength of the heat spreader and increases the contact area of ​​condensation. In addition to improving the structural strength, the increased condensation area also improves the efficiency of vapor-liquid circulation. Therefore, this case improves the disadvantage of traditional existing heat spreaders that cannot be directly assembled with heat dissipation or heat-conducting elements that do not have a flat surface, while also increasing the structural strength of the heat spreader and the vapor-liquid circulation efficiency.

Claims

1. A heat sink reinforcement structure, characterized in that: Include: A top cover having a first side and a second side, the first side being recessed with at least one groove toward the second side, the groove protruding toward the second side to form at least one convex body, the top cover having a first side edge and a second side edge, the groove being connected to the first side edge at one end and to the second side edge at the other end, the groove extending from the first side edge to the second side edge, a heat pipe being disposed within the groove, and the convex body providing enhanced structural strength to the top cover; A lower plate has a third side provided with a first capillary structure and a fourth side for contacting a heat source. The upper cover and the lower plate are correspondingly covered to form an airtight chamber filled with a working fluid. The surface of the convex body does not contact the third side of the lower plate.

2. The heat sink reinforcement structure according to claim 1, wherein: A second capillary structure is also provided, and the second capillary structure is arranged on the convex surface of the upper cover.

3. The heat sink reinforcement structure according to claim 1, wherein: A plurality of support columns extend from the third side, and the plurality of support columns abut against the second side of the upper cover or the plurality of convex bodies. The first capillary structure partially extends on the surface of the plurality of support columns.

4. The heat sink reinforcement structure according to claim 1, wherein: The convex body and the groove are arranged correspondingly or staggered with each other.

5. The heat sink reinforcement structure according to claim 1, wherein: The convex body is in the shape of a convex strip, a convex ring or a convex cross.

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