High-low tooth composite heat pipe
By setting high and low tooth structures and capillary layers in the trench heat pipe to form multiple capillary channels, the high pyrolysis power requirements of high-performance heat source parts are solved, faster heat absorption and heat dissipation effects are achieved, and the heat dissipation efficiency is improved.
Patent Information
- Application Number
- CN202422294902.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing ordinary trench heat pipes cannot meet the high-thermal power requirements of high-performance heat source parts and lack heat dissipation efficiency.
A high and low-tooth composite heat pipe is designed, including a grooved tube and a capillary layer. The inner wall of the grooved tube is equipped with high-tooth and low-tooth structures. The first and second capillary channels are formed in the capillary layer. The height of the high-tooth structure is greater than that of the low-tooth structure. The cross-sectional area of the capillary channel is different. The fluid replenishment speed and evaporation specific surface area are improved with the capillary layer.
The pyrolysis power is increased to achieve faster heat absorption and heat dissipation effects, the combination of capillary channels increases the fluid replenishment speed, the capillary layer increases the evaporation specific surface area, and the pyrolysis power is increased by 3%-6%.
Smart Images
Figure CN223179369U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat dissipation devices, in particular to a high-low tooth composite heat pipe. Background Art
[0002] A grooved heat pipe is a tubular heat dissipation part with grooves formed on its inner wall surface. It is filled with a working medium. The liquid-phase working medium at the hot end of the grooved heat pipe can vaporize to form a gas-phase working medium, and the gas-phase working medium flowing to the cold end of the grooved heat pipe can liquefy and return to the liquid-phase working medium. Such a cycle can achieve heat transfer, thereby realizing heat dissipation of the heat source. The design of the grooves enables the use of the action of the channel interfacial tension to accelerate the reflux of the liquid-phase working medium.
[0003] However, for current heat source components with higher and higher performance, such as chips with higher and higher integration levels, they generate far more heat during operation than before, making the heat dissipation power of existing ordinary grooved heat pipes unable to meet the user's requirements.
[0004] Therefore, how to propose a heat pipe with high heat dissipation power and capable of achieving faster heat absorption and dissipation is a technical problem that needs to be solved urgently now. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a high-low tooth composite heat pipe. The high-low tooth composite heat pipe has high liquid replenishment efficiency, effectively improved heat dissipation power, and can achieve faster heat absorption and dissipation.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A high-low tooth composite heat pipe includes: a grooved pipe, the grooved pipe includes a pipe body, a plurality of high tooth structures arranged at intervals along the circumferential direction of the pipe body, and a plurality of low tooth structures arranged at intervals along the circumferential direction of the pipe body. The high tooth structures and the low tooth structures are both arranged on the inner wall surface of the pipe body and both protrude radially inward of the pipe body. The height of the high tooth structure in the protruding direction is greater than the height of the low tooth structure in the protruding direction; a capillary layer, the capillary layer is arranged in the pipe cavity of the grooved pipe; wherein, a first capillary channel is formed between two adjacent low tooth structures and the capillary layer, and a second capillary channel is formed between the adjacent high tooth structure and the low tooth structure and the capillary layer. The first capillary channel is communicated with the second capillary channel, and the cross-sectional area of the first capillary channel is smaller than the cross-sectional area of the second capillary channel.
[0008] Preferably, a part of the structure of the high tooth structure is embedded in the capillary layer.
[0009] Preferably, at least one of the low tooth structures is provided between two adjacent high tooth structures.
[0010] Preferably, the thickness D of the tube body is 0.1 mm - 2 mm.
[0011] Preferably, the height H1 of the high tooth structure in the protruding direction is 0.05 mm - 1 mm.
[0012] Preferably, the height H2 of the low tooth structure in the protruding direction is 0.05 mm - 0.25 mm.
[0013] Preferably, the distance W1 between two adjacent high tooth structures is 0.15 mm - 1.6 mm.
[0014] Preferably, the distance W2 between two adjacent low tooth structures is 0.05 mm - 0.4 mm.
[0015] Preferably, the tooth angle a1 of the high tooth structure is 0° - 35°.
[0016] Preferably, the tooth angle a2 of the low tooth structure is 0° - 35°.
[0017] Advantages of the present utility model:
[0018] The high-low tooth composite heat pipe provided by the present utility model includes a grooved pipe and a capillary layer. The grooved pipe includes a pipe body, a plurality of high tooth structures arranged at intervals along the circumferential direction of the pipe body, and a plurality of low tooth structures arranged at intervals along the circumferential direction of the pipe body. The high tooth structures and the low tooth structures are both arranged on the inner wall surface of the pipe body and both protrude radially inward of the pipe body. The height of the high tooth structure in the protruding direction is greater than the height of the low tooth structure in the protruding direction. The capillary layer is arranged in the lumen of the grooved pipe. A first capillary channel is formed between two adjacent low tooth structures and the capillary layer, and a second capillary channel is formed between an adjacent high tooth structure and a low tooth structure and the capillary layer. The first capillary channel communicates with the second capillary channel, and the cross-sectional area of the first capillary channel is smaller than the cross-sectional area of the second capillary channel. The high-low tooth composite heat pipe forms a first capillary channel with a fast liquid climbing speed, which can quickly return water, and a second capillary channel with a large liquid climbing amount, which can quickly replenish liquid for the first capillary channel. The first capillary channel and the second capillary channel cooperate to form a large replenishment and fast combination, which can efficiently improve the liquid replenishment speed. In addition, the setting of the capillary layer enables the high-low tooth composite heat pipe to have a larger evaporation specific surface area, and the two cooperate to effectively improve the maximum pyrolysis power that the high-low tooth composite heat pipe can achieve. Description of the drawings
[0019] Figure 1 is a cross-sectional view of the high-low tooth composite heat pipe provided by the present utility model;
[0020] Figure 2 It is a partial enlarged view of the cross-sectional view of the high-low tooth composite heat pipe provided by the present utility model;
[0021] Figure 3 It is a schematic diagram of a grooved pipe provided by the present utility model;
[0022] Figure 4 It is a schematic diagram of another grooved pipe provided by the present utility model.
[0023] In the figure:
[0024] 100, grooved pipe; 110, pipe body; 120, high tooth structure; 130, low tooth structure; 101, first capillary channel; 102, second capillary channel;
[0025] 200, capillary layer. Specific embodiments
[0026] The following further describes the present utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.
[0027] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0028] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0029] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0030] The present utility model discloses a high-low tooth composite heat pipe, which can be used as a heat dissipation component to dissipate heat for a heat source component with heat dissipation requirements. Specifically, as Figures 1 to 4 shown, the high-low tooth composite heat pipe includes a grooved pipe 100 and a capillary layer 200. The grooved pipe 100 includes a pipe body 110, a plurality of high tooth structures 120 and a plurality of low tooth structures 130. Each high tooth structure 120 is arranged on the inner wall surface of the pipe body 110 and protrudes radially inward along the pipe body 110. The plurality of high tooth structures 120 are arranged at intervals in the circumferential direction of the pipe body 110. Each low tooth structure 130 is arranged on the inner wall surface of the pipe body 110 and protrudes radially inward along the pipe body 110. The plurality of low tooth structures 130 are arranged at intervals in the circumferential direction of the pipe body 110. And, the height of the high tooth structure 120 in the protruding direction is greater than the height of the low tooth structure 130 in the protruding direction. It should be noted that the protruding direction here refers to the radial direction of the pipe body 110.
[0031] The capillary layer 200 is arranged in the lumen of the grooved pipe 100. Optionally, the capillary layer 200 is formed by sintering powder layers on the tooth surfaces of the high tooth structures 120 and the low tooth structures 130 of the grooved pipe 100. A first capillary channel 101 is formed between two adjacent low tooth structures 130 and the capillary layer 200. A second capillary channel 102 is formed between an adjacent high tooth structure 120 and a low tooth structure 130 and the capillary layer 200. The first capillary channel 101 is communicated with the second capillary channel 102. And because the height of the high tooth structure 120 in the protruding direction is different from the height of the low tooth structure 130 in the protruding direction, the cross-sectional area of the first capillary channel 101 is smaller than the cross-sectional area of the second capillary channel 102.
[0032] The cavity of the high-low tooth composite heat pipe is evacuated and filled with a working medium. The working medium can be water or other liquids as needed. The high-low tooth composite heat pipe has a hot end and a cold end. The hot end is used to contact the heat source component so that the heat generated by the heat source component during operation can be transferred to the hot end. The liquid working medium at the hot end in the cavity of the high-low tooth composite heat pipe absorbs heat and vaporizes to form a gaseous working medium. The gaseous working medium flows to the cold end of the high-low tooth composite heat pipe and dissipates heat under the action of the heat dissipation fins or other heat dissipation structures provided at the cold end, so that the gaseous working medium liquefies to form a liquid working medium. The liquid working medium can quickly flow back to the hot end through the capillary layer 200 and the first capillary channel 101 and the second capillary channel 102. This cycle repeats to achieve continuous heat dissipation of the heat source component.
[0033] Compared to existing ordinary grooved tubes, the first capillary channel 101 formed in the high-low tooth composite heat pipe provided by the present invention has a fast liquid creeping speed, which can quickly return liquid. The second capillary channel 102 has a large liquid creeping volume, which can quickly replenish liquid for the first capillary channel 101. The first capillary channel 101 and the second capillary channel 102 cooperate to form a large replenishment and fast combination, which can effectively increase the liquid replenishment speed. In addition, the setting of the capillary layer 200 gives the high-low tooth composite heat pipe a larger evaporation specific surface area. The combination of the two effectively improves the maximum pyrolysis power that the high-low tooth composite heat pipe can achieve. Moreover, according to experimental measurements, compared with a single ordinary grooved heat pipe made with the same parameters and the same manufacturing conditions in the prior art, the single high-low tooth composite heat pipe provided by the present invention has an improvement of 3%-6% in pyrolysis power.
[0034] In some embodiments, continue to refer to Figure 2 As shown, part of the structure of the high-tooth structure 120 is embedded in the capillary layer 200. Part of the structure of the high-tooth structure 120 is embedded in the capillary layer 200 formed by the sintered powder layer, which not only provides a bonding surface area for the sintered powder, but is equivalent to providing bones for the sintered powder layer that is finally formed. If the sintered powder layer falls off or separates from the tube wall, it will greatly affect the performance of the heat pipe. Therefore, after the heat pipe is made, it is necessary to check the sintering strength of the capillary layer 200 and the tube wall through a typical hot and cold cycle. After conducting hot and cold shock experiments under the same conditions as the existing ordinary grooved tube, it was found that the high-low tooth composite heat pipe provided by the utility model has less thermal test performance degradation by embedding part of the structure of the high-tooth structure 120 into the capillary layer 200. When it was cut open for inspection, it was found that the capillary layer 200 fell off little and less, so there was a very large improvement in performance maintenance, proving its high reliability.
[0035] In some embodiments, at least one low tooth structure 130 is provided between two adjacent high tooth structures 120. Such an arrangement is conducive to forming more first capillary channels 101 and second capillary channels 102, and can provide more stable support for the capillary layer 200.
[0036] In one embodiment, as Figure 4 shown, one low tooth structure 130 is provided between every two adjacent high tooth structures 120. In a specific embodiment, as Figure 3 shown, two spaced low tooth structures 130 are provided between every two adjacent high tooth structures 120. Of course, in other specific embodiments, three, four or more low tooth structures 130 may also be provided between two adjacent high tooth structures 120.
[0037] It should be noted that the number of low tooth structures 130 provided between every two adjacent high tooth structures 120 may also be different according to requirements. For example, two spaced low tooth structures 130 are provided between two adjacent high tooth structures 120, while three spaced low tooth structures 130 are provided between another two adjacent high tooth structures 120.
[0038] In some embodiments, continuing to refer to Figure 3 shown, the thickness D of the tube body 110 is 0.1 mm - 2 mm. Optionally, the thickness D of the tube body 110 may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, or other values within the range of 0.1 mm - 2 mm.
[0039] In some embodiments, continuing to refer to Figure 3 shown, the height H1 of the high tooth structure 120 in the protruding direction is 0.05 mm - 1 mm. Optionally, the height H1 of the high tooth structure 120 in the protruding direction may be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, or other values within the range of 0.05 mm - 1 mm.
[0040] In some embodiments, continuing to refer to Figure 3As shown, the height H2 of the low tooth structure 130 in the protruding direction is 0.05 mm - 0.25 mm. Optionally, the height H2 of the low tooth structure 130 in the protruding direction can be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.10 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.20 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, or other values within the range of 0.05 mm - 0.25 mm.
[0041] In some embodiments, continue to refer to Figure 3 As shown, the distance W1 between two adjacent high tooth structures 120 is 0.15 mm - 1.6 mm. Optionally, the distance W1 between two adjacent high tooth structures 120 can be 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.20 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, or other values within the range of 0.15 mm - 1.6 mm.
[0042] In some embodiments, continue to refer to Figure 3 As shown, the distance W2 between two adjacent low tooth structures 130 is 0.05 mm - 0.4 mm. Optionally, the distance W1 between two adjacent high tooth structures 120 can be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.10 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.20 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.30 mm, 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm, 0.36 mm, 0.37 mm, 0.38 mm, 0.39 mm, 0.4 mm, or other values within the range of 0.05 mm - 0.4 mm.
[0043] In some embodiments, continue to refer to Figure 3As shown, the tooth angle a1 of the high tooth structure 120 is 0° - 35°. Optionally, the tooth angle a1 of the high tooth structure 120 can be 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, or other angles within the range of 0° - 35°.
[0044] In some embodiments, with continued reference to Figure 3 As shown, the tooth angle a2 of the low tooth structure 130 is 0° - 35°. Optionally, the tooth angle a1 of the high tooth structure 120 can be 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, or other angles within the range of 0° - 35°.
[0045] It should be added that: 1. The materials for making the grooved tube 100 and the capillary layer 200 are both metals. Metals have good thermal conductivity, which is more conducive to heat dissipation. In the embodiments of the present invention, the type of metal is not restricted, and it can be flexibly selected according to requirements. And in the embodiments of the present invention, the outer diameter and length of the grooved tube 100 are not limited, but the optimal value of the length of the grooved tube 100 is within 1M.
[0046] 2. After forming the capillary layer 200 on the sintered powder layer of the grooved tube 100, conventional heat pipe manufacturing processes such as water injection and vacuum pumping are still required to complete the final manufacturing of the high-low tooth composite heat pipe. These processes are all prior arts, so they will not be elaborated here.
[0047] 3. Before and after the high-low tooth composite heat pipe is made, a flattening process or a bending process can also be performed to make the high-low tooth composite heat pipe have the required shape for combination with other accessories. The accessories here include but are not limited to the heat source part provided at the hot end of the grooved tube 100 and the heat dissipation structure provided at the cold end of the grooved tube 100.
[0048] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.
Claims
1. A high-low tooth composite heat pipe, characterized in that, Comprising: A grooved tube (100), the grooved tube (100) comprising a tube body (110), a plurality of high tooth structures (120) arranged at intervals along the circumferential direction of the tube body (110), and a plurality of low tooth structures (130) arranged at intervals along the circumferential direction of the tube body (110). The high tooth structures (120) and the low tooth structures (130) are both arranged on the inner wall surface of the tube body (110) and both protrude radially inward of the tube body (110). The height of the high tooth structure (120) in the protruding direction is greater than the height of the low tooth structure (130) in the protruding direction. A capillary layer (200), the capillary layer (200) being disposed in the lumen of the grooved tube (100). Wherein, a first capillary channel (101) is formed between two adjacent low tooth structures (130) and the capillary layer (200), and a second capillary channel (102) is formed between the adjacent high tooth structure (120) and the low tooth structure (130) and the capillary layer (200). The first capillary channel (101) is communicated with the second capillary channel (102), and the cross-sectional area of the first capillary channel (101) is smaller than the cross-sectional area of the second capillary channel (102).
2. The high-low tooth composite heat pipe according to claim 1, characterized in that, Part of the structure of the high tooth structure (120) is embedded in the capillary layer (200).
3. The high-low tooth composite heat pipe according to claim 1, wherein, At least one low tooth structure (130) is provided between two adjacent high tooth structures (120).
4. The high-low tooth composite heat pipe according to claim 1, characterized in that, The thickness D of the tube body (110) is 0.1 mm - 2 mm.
5. The high-low tooth composite heat pipe according to claim 1, characterized in that, The height H1 of the high tooth structure (120) in the protruding direction is 0.05 mm - 1 mm.
6. The high-low tooth composite heat pipe according to claim 1, wherein The height H2 of the low tooth structure (130) in the protruding direction is 0.05 mm - 0.25 mm.
7. The high-low tooth composite heat pipe according to claim 1, wherein The distance W1 between two adjacent high tooth structures (120) is 0.15 mm - 1.6 mm.
8. The high-low tooth composite heat pipe according to claim 1, wherein The distance W2 between two adjacent low tooth structures (130) is 0.05 mm - 0.4 mm.
9. The high-low tooth composite heat pipe according to claim 1, wherein The tooth angle a1 of the high tooth structure (120) is 0° - 35°.
10. The high-low tooth composite heat pipe according to claim 1, characterized in that, The tooth angle a2 of the low tooth structure (130) is 0° - 35°.