Capillary heat conduction structure

Abstract

The utility model provides a capillary heat conduction structure, which belongs to the technical field of heat conduction and heat dissipation, and comprises a shell, a composite capillary assembly is arranged in the shell, a groove is formed in the inner wall of the shell, the composite capillary assembly is composed of a bottom sintering micropore layer, a middle net-shaped flow guide layer and an upper sintering micropore layer, and the capillary heat conduction structure further comprises a protective layer, and the protective layer is arranged on the surface of the groove. Through the arrangement of the protective layer, the interior of the shell can be protected from being influenced by corrosion, abrasion and high temperature, so that the service life of equipment is prolonged, the overall performance is improved, through the arrangement of the composite capillary assembly, evaporation and condensation circulation of working liquid can be promoted, efficient heat conduction is achieved, and the service life of the equipment is prolonged. The multi-layer structure enhances the overall heat conduction performance through the synergistic effect, the bottom layer and the upper layer sintering micropore layer provide strong capillary force and high heat conductivity, and the middle layer net-shaped flow guide layer ensures smooth flow of steam.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat conduction and heat dissipation, and in particular relates to a capillary heat conduction structure. Background Art

[0002] With the rapid development of science and technology, especially the continuous progress in electronics, aerospace, energy and other fields, the demand for efficient heat dissipation technology is becoming increasingly urgent. Capillary thermal conductive structures have shown broad application prospects in these fields with their advantages such as high thermal conductivity, rapid heat transfer and compact structure. For example, in electronic products, with the increase in integration, heat dissipation issues have become a key factor restricting performance improvements.

[0003] The existing capillary heat conduction structure has insufficient corrosion resistance and large fluid flow resistance. Its corrosion resistance defect makes the structure extremely vulnerable to damage when it comes into contact with corrosive media, which not only accelerates the aging process of the equipment and shortens its service life, but also directly threatens the integrity of the structure, which may lead to performance degradation, including a significant reduction in heat conduction efficiency. Secondly, the problem of excessive fluid flow resistance should not be ignored. It causes the working fluid to encounter many obstacles when flowing through the structure, seriously affecting the heat transfer efficiency and the reflux speed of the liquid. This inefficient flow state not only increases the energy consumption burden of the equipment, but may also cause overheating in local areas, destroy the uniformity of heat conduction, and further affect the overall thermal management effect. Utility Model Content

[0004] The purpose of the utility model is to provide a capillary heat conduction structure, aiming to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A capillary heat conduction structure comprises a shell, a composite capillary component is arranged inside the shell, a groove is opened on the inner wall of the shell, the composite capillary component consists of a bottom sintered microporous layer, a middle mesh guide layer and an upper sintered microporous layer, and also comprises:

[0007] A protective layer is arranged on the surface of the groove.

[0008] As a preferred solution of the utility model, a heat conducting sheet is arranged at the bottom of the shell, the bottom of the inner cavity of the shell is an evaporation zone, and the top of the inner cavity of the shell is a condensation zone.

[0009] As a preferred solution of the utility model, the bottom sintered microporous layer is located in the evaporation zone, and the upper sintered microporous layer is located in the condensation zone.

[0010] As a preferred embodiment of the present utility model, the material of the bottom sintered microporous layer is high-purity copper powder, the material of the middle-layer mesh flow guiding layer is stainless steel wire mesh, and the material of the upper sintered microporous layer is nickel-based alloy powder.

[0011] As a preferred embodiment of the present utility model, the protective layer is composed of a corrosion-resistant coating, a smooth coating, a wear-resistant coating, and a thermal barrier coating.

[0012] As a preferred embodiment of the present utility model, the corrosion-resistant coating is disposed on the surface of the groove, the smooth coating is disposed on the surface of the corrosion-resistant coating, the wear-resistant coating is disposed on the surface of the smooth coating, and the thermal barrier coating is disposed on the surface of the wear-resistant coating.

[0013] As a preferred embodiment of the present utility model, the material used for the corrosion-resistant coating is silicon nitride, the material used for the smooth coating is polytetrafluoroethylene, the material used for the wear-resistant coating is tungsten carbide, and the material used for the thermal barrier coating is yttria-stabilized zirconia.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] For this capillary heat conduction structure, through the setting of the protective layer, it can protect the interior of the housing from corrosion, wear, and high temperature, thereby extending the service life of the device and improving the overall performance. The corrosion-resistant coating is directly disposed on the surface of the groove, effectively preventing the direct contact between the housing and the corrosive medium. The smooth coating significantly reduces the resistance of the coolant during flow due to its extremely low friction coefficient, which not only improves the reflux efficiency of the working liquid but also helps to reduce the formation of scale and deposits, maintaining the cleanliness and efficient operation of the device. The wear-resistant coating protects the underlying coatings and substrates from damage, and the thermal barrier coating can provide effective thermal insulation protection at high temperatures, contributing to more precise temperature control and higher heat conduction efficiency.

[0016] For this capillary heat conduction structure, through the setting of the composite capillary component, it can promote the evaporation and condensation cycle of the working liquid and achieve efficient heat conduction. The multi-layer structure enhances the overall heat conduction performance through synergistic effects. The bottom and upper sintered microporous layers provide strong capillary force and high thermal conductivity, while the middle-layer mesh flow guiding layer ensures the smooth flow of steam. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0018] Figure 1 is the overall structural schematic diagram of the present utility model;

[0019] Figure 2 is the internal structural schematic diagram of the housing of the present utility model;

[0020] Figure 3 is the exploded view of the composite capillary component structure of the present utility model;

[0021] Figure 4 is the cross-sectional view of the housing structure of the present utility model;

[0022] Figure 5 is the structural schematic diagram of the protective layer of the present utility model.

[0023] In the figure: 1. Housing; 2. Composite capillary component; 201. Bottom sintered microporous layer; 202. Middle layer mesh flow guiding layer; 203. Upper sintered microporous layer; 3. Groove; 4. Protective layer; 401. Corrosion-resistant coating; 402. Smooth coating; 403. Wear-resistant coating; 404. Thermal barrier coating; 5. Heat conduction sheet. Specific embodiments

[0024] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings of the specification.

[0025] Many specific details are set forth in the following description in order to provide a thorough understanding of the present utility model, but the present utility model may be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that may be included in at least one implementation manner of the present utility model. The "in one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selectively exclusive embodiment from other embodiments. Embodiment

[0027] Referring to the figure, please refer to Figures 1-5 , which is the first embodiment of the present utility model. This embodiment provides a capillary heat conduction structure, including a housing 1. A composite capillary component 2 is arranged inside the housing 1. Grooves 3 are formed on the inner wall of the housing 1. The composite capillary component 2 is composed of a bottom sintered microporous layer 201, a middle layer mesh flow guiding layer 202 and an upper sintered microporous layer 203, and further includes:

[0028] A protective layer 4, and the protective layer 4 is arranged on the surface of the groove 3.

[0029] Specifically, a heat-conducting sheet 5 is provided at the bottom of the housing 1. The bottom of the inner cavity of the housing 1 is an evaporation zone, and the top of the inner cavity of the housing 1 is a condensation zone. The bottom sintered microporous layer 201 is located in the evaporation zone, and the top sintered microporous layer 203 is located in the condensation zone.

[0030] Furthermore: The housing 1 is the basic support component of the entire capillary heat conduction structure, providing a closed and efficient environment for heat conduction to ensure that heat can flow along the designed path. The composite capillary component 2 is composed of multiple layers of structures, using capillary action to promote the evaporation and condensation cycle of the working liquid. The bottom sintered microporous layer 201 is located in the evaporation zone, providing strong capillary force and high thermal conductivity to promote the rapid evaporation of the working liquid. The middle-layer mesh flow-guiding layer 202 serves as the flow-guiding channel for steam, reducing the flow resistance to ensure that the steam smoothly reaches the condensation zone. The top sintered microporous layer 203 is located in the condensation zone, providing capillary force to quickly return the condensed liquid to the evaporation zone to form a heat conduction cycle. The groove 3 is a specific structure on the inner wall of the housing 1, used to increase the surface area and provide the basis for coating attachment. The protective layer 4 is composed of multiple layers of coatings, and each layer of coating has different functions, jointly protecting the interior of the housing from corrosion, wear, and high temperature.

[0031] Specifically, the material used for the bottom sintered microporous layer 201 is high-purity copper powder, the material used for the middle-layer mesh flow-guiding layer 202 is stainless steel wire mesh, and the material used for the top sintered microporous layer 203 is nickel-based alloy powder.

[0032] Furthermore: Copper has excellent thermal conductivity, which can quickly transfer heat from the heat source to the working liquid, improving the evaporation efficiency. At the same time, after sintering, the high-purity copper powder can form a dense microporous structure. These micropores not only provide strong capillary force but also increase the contact area between the working liquid and the heat source, further enhancing the heat conduction efficiency. The stainless steel wire mesh has good corrosion resistance and can withstand the erosion of most chemical media. The precise mesh design enables the steam to pass through the flow-guiding layer smoothly, reducing the flow resistance and improving the heat conduction efficiency. At the same time, the mesh structure of the stainless steel wire mesh also increases the contact area between the steam and the flow-guiding layer, which is conducive to the uniform distribution and rapid transmission of the steam. The nickel-based alloy powder has good corrosion resistance and mechanical strength, which can ensure the structural stability and durability under harsh working conditions. After sintering, the nickel-based alloy powder can also form a porous structure, providing a certain capillary force to support the reflux of the condensed liquid.

[0033] Specifically, the protective layer 4 is composed of a corrosion-resistant coating 401, a smooth coating 402, a wear-resistant coating 403, and a thermal barrier coating 404. The corrosion-resistant coating 401 is disposed on the surface of the groove 3, the smooth coating 402 is disposed on the surface of the corrosion-resistant coating 401, the wear-resistant coating 403 is disposed on the surface of the smooth coating 402, and the thermal barrier coating 404 is disposed on the surface of the wear-resistant coating 403. The material used for the corrosion-resistant coating 401 is silicon nitride, the material used for the smooth coating 402 is polytetrafluoroethylene, the material used for the wear-resistant coating 403 is tungsten carbide, and the material used for the thermal barrier coating 404 is yttria-stabilized zirconia.

[0034] Furthermore: The corrosion-resistant coating 401 prevents the housing 1 from direct contact with corrosive media, extending the service life of the equipment. Silicon nitride has excellent chemical stability and high-temperature stability, and can effectively resist the erosion of various corrosive media, thereby extending the service life of the equipment. The smooth coating 402 reduces the frictional resistance during the flow of the coolant, improves the reflux efficiency, and reduces fouling. Polytetrafluoroethylene is a polymer material with an extremely low coefficient of friction. It can not only significantly reduce the frictional resistance of the coolant during flow, improve the reflux efficiency, but also effectively prevent the formation of fouling and deposits. The wear-resistant coating 403 withstands high-wear environments and protects the underlying coatings and substrates from damage. Tungsten carbide is a material with extremely high hardness and excellent wear resistance. In the coating, they can withstand high-wear environments and protect the underlying coatings and substrates from damage. The thermal barrier coating 404 provides thermal insulation protection at high temperatures and reduces heat loss. Yttria-stabilized zirconia can maintain the structural stability at high temperatures and provide good thermal insulation effects.

[0035] Working principle:

[0036] In use, heat is transferred from an external heat source to the inside of the housing 1 through the heat conducting fins 5 at the bottom of the housing 1. The bottom sintered microporous layer 201 is located in the evaporation zone. Its high thermal conductivity and dense microporous structure enable heat to be rapidly transferred to the working liquid. The working liquid is heated and evaporated into steam under the capillary force of the bottom sintered microporous layer 201. The steam generated by evaporation passes through the middle layer mesh flow guiding layer 202. The precise mesh design and mesh structure of the stainless steel wire mesh reduce the resistance of steam flow, ensuring that the steam can flow smoothly upward to the condensation zone. At the same time, the corrosion resistance and wear resistance of the stainless steel wire mesh ensure its long-term stability in a harsh working environment. The steam condenses when it encounters the relatively cold wall surface of the housing 1 or the upper sintered microporous layer 203 in the condensation zone. The capillary force of the upper sintered microporous layer 203 causes the condensed liquid to quickly flow back to the evaporation zone, forming a continuous cycle. The corrosion resistance and mechanical strength of the nickel-based alloy powder ensure the stability and durability of the upper sintered microporous layer in a harsh environment. The corrosion-resistant coating 401 prevents the housing 1 from direct contact with corrosive media, extending the service life of the equipment. The smooth coating 402 reduces the frictional resistance of the coolant during flow, improves the reflux efficiency, and prevents the formation of scale and deposits. The wear-resistant coating 403 withstands a high wear environment, protecting the underlying coatings and substrates from damage. The thermal barrier coating 404 provides thermal insulation protection at high temperatures, reducing heat loss, ensuring the thermal conduction efficiency while protecting the internal structure from the influence of high temperatures.

[0037] In summary: Through the setting of the protective layer 4, the inside of the housing 1 can be protected from corrosion, wear, and high temperatures, thereby extending the service life of the equipment and improving the overall performance. The corrosion-resistant coating 401 is directly set on the surface of the groove 3, effectively preventing the housing 1 from direct contact with corrosive media. The smooth coating 402 significantly reduces the resistance of the coolant during flow due to its extremely low friction coefficient. This not only improves the reflux efficiency of the working liquid but also helps to reduce the formation of scale and deposits, keeping the equipment clean and operating efficiently. The wear-resistant coating 403 protects the underlying coatings and substrates from damage. The thermal barrier coating 404 can provide effective thermal insulation protection at high temperatures, contributing to more precise temperature control and higher thermal conduction efficiency. Through the setting of the composite capillary component 2, the evaporation and condensation cycle of the working liquid can be promoted, achieving efficient heat conduction. The multi-layer structure enhances the overall heat conduction performance through synergy. The bottom and upper sintered microporous layers provide strong capillary force and high thermal conductivity, while the middle layer mesh flow guiding layer ensures the smooth flow of steam.

Claims

1. A capillary heat conduction structure, characterized in that: It includes a housing (1), inside which a composite capillary component (2) is arranged. A groove (3) is formed on the inner wall of the housing (1). The composite capillary component (2) consists of a bottom sintered microporous layer (201), a middle layer mesh flow guiding layer (202) and an upper sintered microporous layer (203), and further includes: A protective layer (4) which is arranged on the surface of the groove (3).

2. The capillary thermal conductivity structure according to claim 1, wherein: A heat conducting sheet (5) is arranged at the bottom of the housing (1). The bottom of the inner cavity of the housing (1) is an evaporation area, and the top of the inner cavity of the housing (1) is a condensation area.

3. A capillary thermal conductivity structure according to claim 1, characterized in that: The bottom sintered microporous layer (201) is located in the evaporation area, and the upper sintered microporous layer (203) is located in the condensation area.

4. The capillary thermal conductivity structure according to claim 1, characterized in that: The material of the bottom sintered microporous layer (201) is high-purity copper powder, the material of the middle layer mesh flow guiding layer (202) is stainless steel wire mesh, and the material of the upper sintered microporous layer (203) is nickel-based alloy powder.

5. A capillary heat conduction structure according to claim 1, characterized in that: The protective layer (4) consists of a corrosion-resistant coating (401), a smooth coating (402), a wear-resistant coating (403) and a thermal barrier coating (404).

6. A capillary thermal conductivity structure according to claim 5, characterized in that: The corrosion-resistant coating (401) is arranged on the surface of the groove (3), the smooth coating (402) is arranged on the surface of the corrosion-resistant coating (401), the wear-resistant coating (403) is arranged on the surface of the smooth coating (402), and the thermal barrier coating (404) is arranged on the surface of the wear-resistant coating (403).

7. A capillary thermal conductivity structure according to claim 5, characterized in that: The material of the corrosion-resistant coating (401) is silicon nitride, the material of the smooth coating (402) is polytetrafluoroethylene, the material of the wear-resistant coating (403) is tungsten carbide, and the material of the thermal barrier coating (404) is yttria-stabilized zirconia.

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