Thermally conductive sleeve

Abstract

The utility model relates to the technical field of pipe sleeve, disclose a heat conduction sleeve, include: outer tube, inner cover and heat transfer working medium, outer tube, its inner wall forms the accommodation space, inner cover, the inner cover is located in the outer tube, and the clearance is formed between the outer wall of inner cover and the inner wall of outer tube, and the clearance is filled with heat transfer working medium, and the clearance forms the airtight vacuum gap, through double -sleeve pipe structure, can effectively promote the bending performance of pipe sleeve, makes it can adapt to smaller diameter annular heat source, simultaneously, this structure can more closely adhere annular heat source, effectively reduces the contact thermal resistance loss, and further improves the evenness of pipe sleeve and the heat dissipation efficiency, besides, double -sleeve pipe structure supports the pipe sleeve head and tail connection, makes annular pipe sleeve form complete annular heat transfer loop, is helpful to the power adaptation range of widening.

Description

Technical Field

[0001] This utility model relates to the field of tube sleeve technology, specifically a heat-conducting sleeve. Background Technology

[0002] In fields such as electronic equipment, heat sources are used to conduct heat. Some heat sources have a ring-shaped structure. A ring-shaped heat source can fit the shape of the device, allowing heat to be conducted evenly along the circumference, avoiding performance degradation caused by localized overheating or uneven temperature distribution. Ring-shaped heat sources are usually installed inside a sleeve to protect the heat source from environmental interference and provide insulation, optimize the heat conduction path to reduce heat loss, and also fix the heat source to ensure a proper fit.

[0003] Existing heat pipe sleeves also have several drawbacks: Traditional rod-shaped heat pipe sleeves typically require bending to fit a ring-shaped heat source. However, due to structural limitations, the bending area has a large radius (R), making it difficult to match small-diameter ring-shaped heat sources. This results in a small contact area, poor temperature uniformity, and reduced heat dissipation. Furthermore, traditional heat pipe sleeves, after being bent into a ring, suffer from the problem of "unable to connect the beginning and end," making it difficult to achieve a closed heat transfer path and limiting their application in high-power-density ring-shaped heat source scenarios. Simultaneously, due to structural constraints, traditional heat pipe sleeves do not fit snugly against the ring-shaped heat source, resulting in high contact thermal resistance and hindering the layout and integration of external heat dissipation devices, further reducing the flexibility of system-level heat dissipation design.

[0004] Therefore, a heat-conducting sleeve is urgently needed to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a heat-conducting sleeve to solve the problem of low fit between traditional sleeves and annular heat sources.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A heat-conducting sleeve, comprising:

[0008] The outer tube has an inner wall that forms a receiving space;

[0009] An inner sleeve is fitted inside the outer tube, and a gap is formed between the outer wall of the inner sleeve and the inner wall of the outer tube.

[0010] The gap is filled with a heat transfer medium, and the gap forms a sealed vacuum gap.

[0011] As a preferred embodiment of the heat-conducting sleeve, the side wall of the outer tube is provided with at least one degassing port, the degassing port is in communication with the gap, and a sealing element is provided in the degassing port to seal the gap.

[0012] As a preferred embodiment of the heat-conducting sleeve, the two ends of the inner sleeve extend axially along the two ends of the outer tube to form an extension, and a stepped surface is formed between the outer wall of the extension and the outer wall of the outer tube.

[0013] As a preferred embodiment of a heat-conducting sleeve, the heat transfer medium is copper powder and pure water, and the heat transfer medium is used for the absorption, transfer and release of heat.

[0014] As a preferred embodiment of the heat-conducting sleeve, the two ends of the outer tube are respectively sealed and connected to the corresponding ends of the inner sleeve through a connecting part, and the connecting part extends outward along the outer wall of the corresponding end of the inner sleeve.

[0015] As a preferred embodiment of the heat-conducting sleeve, the inner sleeve has a hollow structure, and the inner wall of the hollow inner sleeve forms a fitting space for accommodating an annular heat source.

[0016] As a preferred embodiment of the heat-conducting sleeve, the gap is an annular vacuum gap, and the radial width of the annular vacuum gap is 0.5-3mm.

[0017] As a preferred embodiment of a heat-conducting sleeve, both the outer wall of the inner sleeve and the inner wall of the outer tube are provided with an oxide layer, which is used to improve the heat transfer efficiency of the sleeve.

[0018] As a preferred embodiment of the heat-conducting sleeve, a support column is connected between the outer wall of the inner sleeve and the inner wall of the outer tube, and the support column is used to maintain the distance of the gap.

[0019] As a preferred embodiment of the heat-conducting sleeve, the sealing element is disposed on the outer wall of the inner sleeve, sealing from the outer wall of the inner sleeve to the degassing port.

[0020] The beneficial effects of this invention are as follows: the double-sleeve structure effectively improves the bending performance of the sleeve, enabling it to adapt to smaller diameter annular heat sources; simultaneously, this structure allows for a tighter fit with the annular heat source, effectively reducing contact thermal resistance loss and thus improving the temperature uniformity and heat dissipation efficiency of the sleeve. Furthermore, the double-sleeve structure supports end-to-end connection of the sleeve, allowing the annular sleeve to form a complete annular heat transfer loop, which helps to broaden the power adaptability range. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of a heat-conducting sleeve provided by this utility model;

[0022] Figure 2 A cross-sectional view of a heat-conducting sleeve provided by this utility model;

[0023] Figure 3 for Figure 2 The main view;

[0024] Figure 4 for Figure 3 A magnified view of part A in the diagram;

[0025] Figure 5 This utility model provides an overall structural diagram of a heat-conducting sleeve with a support column installed.

[0026] The reference numerals in the figures are as follows: 1. Outer tube; 2. Inner sleeve; 3. Gap; 4. Connecting part; 5. Extension part; 6. Stepped surface; 7. Degassing port; 8. Sealing component; 9. Support column. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0032] In one embodiment of this utility model, such as Figure 1-5 As shown, a heat-conducting sleeve is provided, comprising: an outer tube 1, an inner sleeve 2, and a heat transfer medium. The outer tube 1 has an inner wall forming a receiving space; the inner sleeve 2 is fitted inside the outer tube 1, and a gap 3 is formed between the outer wall of the inner sleeve 2 and the inner wall of the outer tube 1; the gap 3 is filled with a heat transfer medium, and the gap 3 forms a sealed vacuum gap 3.

[0033] The sleeve provided by this utility model, through its double-sleeve structure, effectively improves the bending performance of the sleeve, enabling it to adapt to smaller diameter annular heat sources. Simultaneously, this structure allows for a tighter fit to the annular heat source, effectively reducing contact thermal resistance loss and thus improving the sleeve's temperature uniformity and heat dissipation efficiency. Furthermore, the double-sleeve structure supports end-to-end connection of the sleeve, allowing the annular sleeve to form a complete annular heat transfer loop, which helps to broaden the power adaptability range.

[0034] In this embodiment, the outer tube 1 and the inner sleeve 2 are cylindrical.

[0035] Preferably, both ends of the outer tube 1 are sealed to the corresponding ends of the inner sleeve 2 via connecting parts 4, which extend outward along the outer wall of the corresponding ends of the inner sleeve 2. This ensures a vacuum seal in the gap 3, guaranteeing stable phase change circulation of the heat transfer medium.

[0036] Preferably, the two ends of the inner sleeve 2 extend axially along the two ends of the outer tube 1 to form an extension 5, and a stepped surface 6 is formed between the outer wall of the extension 5 and the outer wall of the outer tube 1. The stepped surface 6 can prevent external dust and impurities from entering the connection gap between the outer tube 1 and the extension 5, and at the same time provide a transitional adaptation surface for external pipes or fasteners of different diameters, improving the compatibility of the overall assembly.

[0037] Preferably, the inner sleeve 2 has a hollow structure, and the inner wall of the hollow inner sleeve 2 forms a fitting space for accommodating the annular heat source. The fitting space matches the shape of the annular heat source, increasing the contact area and reducing contact thermal resistance. Moreover, uniform contact makes heat transfer more even, reducing local overheating. At the same time, it facilitates the rapid assembly and positioning of the annular heat source, improving installation efficiency.

[0038] In this embodiment, a support column 9 connects the outer wall of the inner sleeve 2 and the inner wall of the outer tube 1. The support column 9 is used to maintain the distance of the gap 3. The support column 9 resists the pressure difference between the inside and outside and stabilizes the width of the gap 3. The number of support columns 9 should not be too large, and they should be evenly distributed according to the installation of the ring tube to avoid affecting the installation of the ring tube.

[0039] In this embodiment, both the outer wall of the inner sleeve 2 and the inner wall of the outer tube 1 are provided with an oxide layer, which is used to improve the heat transfer efficiency of the sleeve. The sleeve transfers heat through the phase change cycle of the working fluid. The micropores in the oxide layer increase the phase change area and sites, accelerate evaporation and condensation, enhance the circulation power, and improve the heat transfer efficiency.

[0040] Preferably, the heat transfer medium is copper powder and pure water, which are used for the absorption, transfer and release of heat. Copper powder enhances thermal conductivity, and pure water performs phase change heat transfer, synergistically improving the heat transfer rate. Moreover, both are widely available and low in cost, making them suitable for long-term operation of annular heat sources.

[0041] Preferably, the outer tube 1 has at least one degassing port 7 on its side wall, which communicates with the gap 3. A sealing element 8 is provided inside the degassing port 7 to seal the gap 3. The degassing port 7 can be used to remove air from the gap 3, and together with the sealing element 8, a high vacuum seal is achieved. Moreover, the sealing element 8 can be reopened, which is beneficial for later maintenance or replenishment of working fluid.

[0042] Furthermore, the sealing element 8 is disposed on the outer wall of the inner sleeve 2, sealing from the outer wall of the inner sleeve 2 towards the degassing port 7. Using the inner sleeve 2 as a reference, the sealing element 8 is precisely positioned, and the sealing surface fits tightly. In this embodiment, the sealing element 8 can be integrally formed with the outer wall of the inner sleeve 2, or it can be welded separately. Integral forming ensures no gap 3 on the sealing surface, while separate welding adapts to complex processing scenarios; both methods can guarantee a vacuum seal for the gap 3.

[0043] Preferably, the gap 3 is an annular vacuum gap 3, and the radial width of the annular vacuum gap 3 is 0.5-3mm. The vacuum environment reduces convective thermal resistance, and the 0.5-3mm width is suitable for phase change flow of the working fluid; the narrow gap 3 reduces the overall volume and is suitable for compact installation.

[0044] In this embodiment, the process of installing the annular heat source onto the inner wall of the inner sleeve 2 is as follows: The annular heat source is aligned with the hollow fitting space of the inner sleeve 2, and guided by the shape of the inner wall of the inner sleeve 2, it is smoothly pushed in axially. Relying on the shape matching between the inner sleeve 2 and the annular heat source, the outer wall of the heat source naturally fits against the inner wall of the inner sleeve 2. Combined with the compact design of the double-sleeve structure, the gap 3 between the traditional bent sleeve and the small-diameter heat source is eliminated, maximizing the contact area to reduce thermal resistance. The two ends of the sleeve are sealed together through the connecting part 4, forming a closed annular loop to meet the circumferential heat dissipation requirements of the annular heat source.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A heat-conducting sleeve, characterized in that, include: The outer tube has an inner wall that forms a receiving space; An inner sleeve is fitted inside the outer tube, and a gap is formed between the outer wall of the inner sleeve and the inner wall of the outer tube. The gap is filled with a heat transfer medium, which is copper powder and pure water. The heat transfer medium is used for the absorption, transfer and release of heat. The outer tube has at least one degassing port on its side wall. The degassing port is connected to the gap. A sealing element is provided inside the degassing port. The sealing element is used to seal the degassing port to seal the gap. The inner sleeve is a hollow structure, and the inner wall of the hollow inner sleeve forms an adaptation space for accommodating an annular heat source. The two ends of the inner sleeve extend axially along the two ends of the outer tube to form an extension, and a stepped surface is formed between the outer wall of the extension and the outer wall of the outer tube. The gap is an annular vacuum gap, and the radial width of the annular vacuum gap is 0.5-3mm.

2. The heat-conducting sleeve according to claim 1, characterized in that, The two ends of the outer tube are respectively sealed and connected to the corresponding ends of the inner sleeve through a connecting part, and the connecting part extends outward along the outer wall of the corresponding end of the inner sleeve.

3. A heat-conducting sleeve according to claim 1 or 2, characterized in that, Both the outer wall of the inner sleeve and the inner wall of the outer tube are provided with an oxide layer, which is used to improve the heat transfer efficiency of the sleeve.

4. A heat-conducting sleeve according to claim 1 or 2, characterized in that, A support column is connected between the outer wall of the inner sleeve and the inner wall of the outer tube, and the support column is used to maintain the distance of the gap.

5. A heat-conducting sleeve according to claim 1, characterized in that, The sealing element is disposed on the outer wall of the inner sleeve and seals from the outer wall of the inner sleeve to the degassing port.

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