Composite vapor chamber

Abstract

The utility model discloses a composite uniform-temperature plate which comprises a top plate. The bottom plate is buckled with the top plate, and a vacuum cavity is defined by the bottom plate and the top plate; the first supporting columns are arranged in the vacuum chamber and abut against the top plate and the bottom plate respectively; a plurality of drainage grooves are formed in the outer circumferential surface of the first supporting column; and the first capillary liquid absorption structure is arranged in the drainage groove. In the vacuum chamber, the drainage groove provides a special channel for flowing of the working medium, and the liquid working medium can be subjected to a stronger capillary action and can be quickly sucked back to a heating area, so that the capillary suction force of the composite vapor chamber to the working medium is enhanced, and the backflow speed is increased; meanwhile, the drainage groove is filled with the first capillary liquid suction structure, the capillary suction force of the liquid working medium in the vacuum cavity is further enhanced, the higher the capillary suction force is, the higher the flowing speed of the liquid working medium is, the working medium can flow back along the drainage groove at a higher speed, the backflow speed of the working medium can be further increased, and the service life of the working medium is prolonged. And the heat transfer efficiency of the composite vapor chamber is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation structures, in particular to a composite temperature equalizing plate. Background Art

[0002] With the development of electronic components, the efficiency of electronic components is getting higher and higher. The accompanying problem is that the heat generated by electronic components per unit time under normal working conditions is also increasing, and the required heat dissipation solutions also need to be continuously improved. As one of the heat dissipation solutions that are gradually being widely adopted, the heat spreader also needs to improve its own heat dissipation capacity. Since the heat spreader involves solid heat transfer and working fluid evaporation and reflux heat transfer, solid heat transfer will increase the thermal resistance of the heat spreader and increase the temperature difference between the top and bottom plates of the heat spreader. In order to improve the heat dissipation efficiency, the solid heat transfer effect of the heat spreader should be weakened, or the working fluid evaporation and reflux heat transfer effect of the heat spreader should be strengthened. Obviously, increasing the working fluid reflux velocity is an effective way to increase the working fluid evaporation and reflux efficiency; however, the working fluid reflux velocity of the heat spreader in the prior art is limited, resulting in low heat transfer efficiency.

[0003] Therefore, the existing technology still needs to be improved and developed. Utility Model Content

[0004] The technical problem to be solved by the present invention is that, in response to the above-mentioned defects of the prior art, a composite temperature equalizing plate is provided to increase the reflux speed of the working medium and thereby improve the heat transfer efficiency.

[0005] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0006] A composite temperature averaging plate, comprising:

[0007] roof;

[0008] The bottom plate is buckled with the top plate to enclose a vacuum chamber;

[0009] A plurality of first support columns are arranged in the vacuum chamber and respectively support the top plate and the bottom plate; a plurality of drainage grooves are arranged on the outer circumference of the first support columns;

[0010] The first capillary liquid absorption structure is arranged in the drainage groove.

[0011] The composite temperature equalizing plate, wherein the first capillary liquid absorption structure comprises:

[0012] a capillary collar, sleeved outside the first support column and coaxially arranged with the first support column;

[0013] A plurality of first liquid-absorbing cores are arranged on the inner wall of the capillary ring and correspond one-to-one to the drainage grooves; the first liquid-absorbing cores are located in the drainage grooves.

[0014] The composite temperature homogenizing plate, wherein the bottom plate has a heating area and a non-heating area, and the first support column is arranged in the non-heating area.

[0015] The composite temperature homogenizing plate further comprises:

[0016] A plurality of second support columns are arranged in the vacuum chamber and respectively support the top plate and the bottom plate; the second support columns are located in the heating zone.

[0017] The composite temperature homogenizing plate further comprises:

[0018] The boss is arranged on a side of the bottom plate away from the top plate and corresponds to the heating zone.

[0019] The composite temperature homogenizing plate, wherein a groove is provided on a side of the bottom plate close to the top plate, and the heating area is located in the groove; the groove is recessed in a direction away from the top plate and extends to the boss.

[0020] The composite temperature homogenizing plate, wherein a top plate groove is provided on a side of the top plate close to the bottom plate, the top plate groove is recessed in a direction away from the bottom plate and corresponds to the heating area.

[0021] The composite temperature homogenizing plate further comprises:

[0022] A plurality of top plate drainage grooves are provided on the top plate and extend toward the top plate groove;

[0023] A plurality of bottom plate drainage grooves are arranged on the bottom plate and extend from the non-heating area to the groove.

[0024] The composite temperature homogenizing plate further comprises:

[0025] A plurality of second liquid-absorbing cores are respectively arranged in the top plate drainage groove and the bottom plate drainage groove.

[0026] The composite temperature equalizing plate, wherein the top plate and the bottom plate are both copper plates.

[0027] Beneficial effect: In the present application, in the vacuum chamber, the drainage groove provides a dedicated channel for the flow of the working fluid, making the flow path of the working fluid clearer and smoother, and the liquid working fluid can be subjected to a stronger capillary action. The liquid working fluid can be quickly sucked back to the heating area, thereby enhancing the capillary suction of the composite temperature equalizing plate on the working fluid. This capillary suction is crucial to improving the reflux speed.

[0028] At the same time, the first capillary liquid suction structure is filled in the drainage groove, which further enhances the capillary suction of the liquid working medium in the vacuum chamber. The stronger the capillary suction, the faster the flow speed of the liquid working medium, so that the working medium can flow back along the drainage groove at a faster speed, which can further increase the reflux speed of the working medium and thereby improve the heat transfer efficiency of the composite temperature homogenizing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of the composite temperature equalizing plate described in this application;

[0030] Figure 2 This is a schematic diagram of the exploded structure of the composite temperature equalizing plate described in the present utility model;

[0031] Figure 3 It is a schematic diagram of the exploded structure of the top plate and the bottom plate in the present invention;

[0032] Figure 4 This is a schematic diagram of the exploded structure of the first support column and the first capillary liquid absorption structure in the present invention;

[0033] Figure 5 It is a schematic diagram of the internal structure of the composite temperature equalizing plate described in the present utility model. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended solely to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0035] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0036] This application provides a composite temperature averaging plate, such as Figure 1 、 Figure 2 and Figure 5As shown, the composite temperature equalizing plate includes a top plate 1, a bottom plate 2, a plurality of first support columns 3, and a first capillary liquid absorption structure 4; the bottom plate 2 is buckled with the top plate 1 and encloses a vacuum chamber; a plurality of first support columns 3 are arranged in the vacuum chamber and respectively support the top plate 1 and the bottom plate 2; a plurality of drainage grooves 31 are provided on the outer circumferential surface of the first support column 3; the first capillary liquid absorption structure 4 is arranged in the drainage groove 31.

[0037] Specifically, the top plate 1 and the bottom plate 2 cooperate with each other so that when the top plate 1 and the bottom plate 2 are buckled together, they can enclose and form a vacuum chamber. The first support column 3 is disposed in the vacuum chamber, and the axial direction of the first support column 3 is arranged along the arrangement direction of the top plate 1 and the bottom plate 2, so that one axial end of the first support column 3 supports the top plate 1, and the other axial end of the first support column 3 supports the bottom plate 2, thereby performing heat transfer between the top plate 1 and the bottom plate 2. A plurality of drainage grooves 31 are arranged in sequence along the circumferential direction on the outer circumferential surface of the first support column 3. In the vacuum chamber, the drainage grooves 31 provide a dedicated channel for the flow of the working medium, making the flow path of the working medium clearer and smoother, and the liquid working medium can be subjected to a stronger capillary action, and the liquid working medium can be quickly sucked back to the heating area, thereby strengthening the capillary suction of the composite temperature equalizing plate on the working medium. This capillary suction is crucial to improving the reflux speed.

[0038] At the same time, the first capillary liquid absorption structure 4 is filled in the drainage groove 31, which further enhances the capillary suction of the liquid working medium in the vacuum chamber. The stronger the capillary suction, the faster the flow speed of the liquid working medium, so that the working medium can reflux along the drainage groove 31 at a faster speed, which can further increase the reflux speed of the working medium and thereby improve the heat transfer efficiency of the composite temperature equalizing plate.

[0039] Moreover, the design of the first support column 3 and the first capillary structure 4 reduces the possibility of the working medium being retained inside the vacuum chamber. The working medium no longer relies on natural gravity or diffusion to slowly return, but instead relies on a strong capillary action to quickly return. This allows the working medium to circulate more efficiently, avoids being retained in the non-heating area for a long time, and improves the overall efficiency.

[0040] like Figure 4 As shown, the first capillary liquid absorption structure 4 includes a capillary ring 41 and a plurality of first liquid absorption cores 42; the capillary ring 41 is sleeved on the outside of the first support column 3 and is coaxially arranged with the first support column 3; the plurality of first liquid absorption cores 42 are arranged on the inner wall of the capillary ring 41 and correspond one-to-one to the drainage groove 31; the first liquid absorption core 42 is located in the drainage groove 31.

[0041] Specifically, due to the provision of the drainage groove 31, the first support column 3 forms a gear-shaped support column in overall appearance; the first capillary structure 4 forms a complementary structure with the first support column 3; the first absorbent core 42 is arranged to protrude inward relative to the inner side wall of the capillary ring 41, and multiple first absorbent cores 42 are arranged along the circumference of the capillary ring 41, thereby forming a one-to-one corresponding and complementary structure between the first absorbent core 42 and the drainage groove 31. The capillary ring 41 is arranged outside the first support column 3, and the first absorbent core 42 is filled into the corresponding drainage groove 31, forming a meshing between the first support column 3 and the capillary ring 41.

[0042] It should be noted that the capillary ring 41 also adopts a capillary structure.

[0043] The bottom plate 2 has a heating area and a non-heating area, and the first support column 3 is arranged in the non-heating area.

[0044] Specifically, if the first support column 3 is positioned within the heating zone, the condensate's return path becomes complex, affecting the return speed and heat transfer efficiency. Placing the first support column 3 within the non-heating zone facilitates rapid return of the condensate to the heating zone after evaporation. The first wick 42 within the drainage groove 31 enhances capillary suction, accelerating the return of the condensate from the top plate 1 to the bottom plate 2.

[0045] like Figure 2 and Figure 5 As shown, the composite temperature homogenizing plate further includes a plurality of second support columns 7, which are arranged in the vacuum chamber and respectively support the top plate 1 and the bottom plate 2; the second support columns 7 are located in the heating zone.

[0046] Specifically, the heating zone is located at the center of the base plate 2, and the non-heating zone is located at the periphery of the heating zone; correspondingly, a plurality of second support columns 7 are arranged in an array at the center of the base plate 2, and a plurality of first support columns 3 are arranged in an array at the periphery of the second support column 7 array.

[0047] The axial direction of the second support column 7 is parallel to the axial direction of the first support column 3, and one axial end of the second support column 7 is in contact with and supports the top plate 1, and the other axial end of the second support column 7 is in contact with and supports the bottom plate 2. The outer circumference of the second support column 7 is smooth, and there is no drainage groove and liquid wick structure, and it will not interfere with the flow of the working fluid. Therefore, in this application, the second support column 7 is stacked in the heating zone to ensure that heat can be concentratedly delivered to the working fluid to accelerate evaporation. The second support column 7 is used to provide stable rigid support, will not cause efficient suppression of the evaporation process of the working fluid, prevent thermal expansion from causing structural deformation, and ensure the mechanical stability of the composite temperature equalizing plate in a high temperature environment.

[0048] There is no drainage groove on the second support column 7, and no liquid wick structure is filled. This design avoids the working medium from being retained near the second support column 7 in the heating area, ensures the evaporation efficiency is maximized, and enables the working medium to evaporate quickly toward the top plate 1 without being hindered by the complexity of the return path.

[0049] At the same time, the second support column 7 and the first support column 3 are arranged in partitions to form an efficient heat transfer-condensation-reflux circulation system; the second support column 7 ensures the stability of the heat transfer process in the heating area, and the first support column 3 increases the reflux speed of the working medium in the non-heating area of ​​the periphery, reducing the residence of the liquid working medium in the high-temperature area, thereby reducing thermal resistance and achieving efficient heat transfer efficiency.

[0050] In one embodiment of this application, Figure 3 and Figure 5 As shown, the composite temperature homogenizing plate further includes a boss 6 , which is arranged on a side of the bottom plate 2 away from the top plate 1 and corresponds to the heating zone.

[0051] Specifically, the boss 6 is on the outer side surface of the bottom plate 2 and is arranged to protrude toward the bottom plate 2 away from the top plate 1; since the position of the boss 6 also corresponds to the heating area, the setting of the boss 6 can make the heating area on the bottom plate 2 fit more closely with the heat source, reducing the thermal resistance between the contact interfaces. At the same time, better contact ensures that heat can be efficiently transferred to the interior of the vacuum chamber, thereby quickly evaporating the working medium and starting the working cycle of the composite temperature equalizing plate.

[0052] The bosses 6 also serve to concentrate heat in the desired heating zone, preventing unnecessary heat from spreading to surrounding areas, thereby improving the efficiency of the thermal management system. Positioning the bosses 6 on the base plate 2 at locations corresponding to the heating zones ensures precise alignment between the composite vapor chamber and the heat source, acting as an alignment or positioning structure to prevent misalignment during installation.

[0053] At the same time, the design of the boss 6 concentrates thermal stress in one area, preventing heat from diffusing to the entire base plate 2 and causing uneven thermal expansion, thereby reducing the risk of deformation of the base plate 2 caused by thermal stress; the heat concentratedly transferred by the boss 6 can make the working fluid in the base plate 2 evaporate faster, thereby accelerating the condensation and reflux cycle, which helps the composite temperature plate to transfer and dissipate heat more efficiently.

[0054] In one implementation of this embodiment, Figure 2 As shown, a groove 5 is provided on one side of the bottom plate 2 close to the top plate 1 , and the heating zone is located in the groove 5 ; the groove 5 is recessed in a direction away from the top plate 1 and extends to the boss 6 .

[0055] Specifically, the groove 5 corresponds to the heating zone. The groove 5 increases the surface area of ​​the base plate 2 in the heating zone, allowing more working fluid to contact the heating surface and accelerate the evaporation process. The evaporation capacity of the working fluid is closely related to the heat transfer area. Increasing the surface area can improve the heat transfer efficiency, thereby improving the overall heat dissipation capacity of the composite temperature vapor chamber.

[0056] The groove 5 concentrates the working fluid in the heating area, effectively guiding the liquid to flow near the heat source, accelerating local evaporation, and reducing liquid accumulation; due to the guiding effect of the groove 5 on the liquid, the heating is concentrated in the area of ​​the groove 5, which can trigger the evaporation phase change of the working fluid more quickly, which helps to achieve stable thermal management and circulation.

[0057] At the same time, one axial end of the second support column 7 is located in the groove 5 and supports the bottom of the groove 5; the second support column 7 and the groove 5 cooperate with each other, and the shape of the groove 5 not only provides a channel for the working medium, but also provides a positioning point for the second support column 7, thereby enhancing the stability of the entire composite temperature dispersion plate structure and preventing deformation caused by thermal expansion.

[0058] In one embodiment of this application, Figure 3 As shown, a top plate groove 8 is provided on one side of the top plate 1 close to the bottom plate 2 . The top plate groove 8 is recessed in a direction away from the bottom plate 2 and corresponds to the heating area.

[0059] Specifically, the top plate groove 8 is arranged opposite the groove 5, and one axial end of the second support column 7 supports the bottom of the top plate groove 8, while the other axial end of the second support column 7 supports the bottom of the groove 5. The top plate groove 8 provides a path for the vapor of the working medium, facilitating the rapid rise of evaporated vapor from the bottom plate 2 to the top plate 1 for condensation. The relative arrangement of the top plate groove 8 and the groove 5 provides a steam channel between the top plate 1 and the bottom plate 2, reducing steam resistance and preventing steam turbulence in the confined space, thereby increasing the circulation speed of the working medium.

[0060] The top plate grooves 8 also help alleviate thermal stress within the composite vapor chamber, preventing temperature differences from causing inconsistent thermal expansion between the top and bottom plates 1 and 2, thereby preventing plate deformation or failure. Furthermore, by symmetrically designing the grooves on the top and bottom plates 1 and 2, the flow paths of steam and condensate within the composite vapor chamber are smoother and more uniform, helping to maintain thermal uniformity within the vacuum chamber.

[0061] In one embodiment of this application, Figure 2 and Figure 3 As shown, the composite temperature equilibrium plate also includes a plurality of top plate drainage grooves 9 and a plurality of bottom plate drainage grooves 10; a plurality of top plate drainage grooves 9 are arranged on the top plate 1 and extend toward the top plate groove 8; a plurality of bottom plate drainage grooves 10 are arranged on the bottom plate 2 and extend from the non-heating area to the groove 5.

[0062] Specifically, the top plate drainage groove 9 extends from the outside of the top plate groove 8 to the top plate groove 8 on the top plate 1; the bottom plate drainage groove 10 extends from the non-heating area to the heating area on the bottom plate 2, and extends to the groove 5; the top plate drainage groove 9 is used to strengthen the capillary suction of the top plate 1 to the working fluid, and the bottom plate drainage groove 10 is used to strengthen the capillary suction of the bottom plate 2 to the working fluid.

[0063] The plurality of top plate drainage grooves 9 are arranged in a cross-shape on the top plate 1 with the top plate groove 8 as the center; similarly, the plurality of bottom plate drainage grooves 10 are arranged in a cross-shape on the bottom plate 2 with the groove 5 as the center.

[0064] like Figure 2 As shown, the composite temperature equalizing plate further includes a plurality of second liquid wicks 11 , and the plurality of second liquid wicks 11 are respectively arranged in the top plate drainage groove 9 and the bottom plate drainage groove 10 .

[0065] Specifically, the second liquid absorbent core 11 is provided in the top plate drainage groove 9 and the bottom plate drainage groove 10 to further enhance the capillary suction of the liquid working medium in the vacuum chamber through the second liquid absorbent core 11. The stronger the capillary suction, the faster the flow speed of the liquid working medium, so that the working medium can reflux along the top plate drainage groove 9 and the bottom plate drainage groove 10 at a faster speed, which can further improve the reflux speed of the working medium and thereby improve the heat transfer efficiency of the composite temperature equalizing plate.

[0066] In one embodiment of the present application, both the top plate 1 and the bottom plate 2 are made of copper. Copper has excellent thermal conductivity and can quickly transfer heat away from the heat source. Copper has a high thermal conductivity coefficient, which allows heat to be quickly dispersed, thereby effectively reducing the temperature of the device to be cooled and preventing overheating.

[0067] In summary, the present application provides a composite heat spreader, comprising: a top plate; a bottom plate, which is engaged with the top plate and encloses a vacuum chamber; a plurality of first support columns, which are disposed in the vacuum chamber and respectively support the top plate and the bottom plate; a plurality of drainage grooves are disposed on the outer circumferential surface of the first support columns; and a first capillary liquid absorption structure is disposed in the drainage grooves. In the present application, within the vacuum chamber, the drainage grooves provide a dedicated channel for the flow of the working fluid, making the flow path of the working fluid clearer and smoother, allowing the liquid working fluid to be subjected to a stronger capillary action, and the liquid working fluid can be quickly absorbed back to the heating area, thereby strengthening the capillary suction force of the composite heat spreader on the working fluid. This capillary suction force is crucial for improving the reflux speed. At the same time, the first capillary liquid suction structure is filled in the drainage groove, which further enhances the capillary suction of the liquid working medium in the vacuum chamber. The stronger the capillary suction, the faster the flow speed of the liquid working medium, so that the working medium can flow back along the drainage groove at a faster speed, which can further increase the reflux speed of the working medium and thereby improve the heat transfer efficiency of the composite temperature homogenizing plate.

[0068] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A composite temperature equalizing plate, characterized in that: It includes: roof; The bottom plate is buckled with the top plate to enclose a vacuum chamber; A plurality of first support columns are arranged in the vacuum chamber and respectively support the top plate and the bottom plate; a plurality of drainage grooves are arranged on the outer circumference of the first support columns; The first capillary liquid absorption structure is arranged in the drainage groove.

2. The composite temperature equalizing plate according to claim 1, characterized in that: The first capillary liquid absorption structure comprises: a capillary collar, sleeved outside the first support column and coaxially arranged with the first support column; A plurality of first liquid-absorbing cores are arranged on the inner wall of the capillary ring and correspond one-to-one to the drainage grooves; the first liquid-absorbing cores are located in the drainage grooves.

3. The composite temperature equalizing plate according to claim 1, characterized in that: The bottom plate has a heating area and a non-heating area, and the first support column is arranged in the non-heating area.

4. The composite temperature equalizing plate according to claim 3, characterized in that: It also includes: A plurality of second support columns are arranged in the vacuum chamber and respectively support the top plate and the bottom plate; the second support columns are located in the heating zone.

5. The composite temperature equalizing plate according to claim 3, characterized in that: It also includes: The boss is arranged on a side of the bottom plate away from the top plate and corresponds to the heating zone.

6. The composite temperature equalizing plate according to claim 5, characterized in that: A groove is provided on one side of the bottom plate close to the top plate, and the heating area is located in the groove; the groove is recessed in a direction away from the top plate and extends to the boss.

7. The composite temperature equalizing plate according to claim 3, characterized in that: A top plate groove is provided on one side of the top plate close to the bottom plate. The top plate groove is recessed in a direction away from the bottom plate and corresponds to the heating area.

8. The composite temperature equalizing plate according to claim 7, characterized in that: It also includes: A plurality of top plate drainage grooves are provided on the top plate and extend toward the top plate groove; A plurality of bottom plate drainage grooves are arranged on the bottom plate and extend from the non-heating area to the groove.

9. The composite temperature equalizing plate according to claim 8, characterized in that: It also includes: A plurality of second liquid-absorbing cores are respectively arranged in the top plate drainage groove and the bottom plate drainage groove.

10. The composite temperature vapor chamber according to claim 1, characterized in that: The top plate and the bottom plate are both copper plates.

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