High-low tooth composite heat pipe

Abstract

The invention discloses a high-low tooth composite heat pipe. The high-low-tooth composite heat pipe comprises a grooved pipe and a capillary layer, the grooved pipe comprises a pipe body, a high-tooth structure and a low-tooth structure, the high-tooth structure and the low-tooth structure are arranged on the inner wall face of the pipe body in the radial direction of the pipe body in a protruding mode, the height of the high-tooth structure in the protruding direction is larger than that of the low-tooth structure in the protruding direction, and the capillary layer is arranged in a pipe cavity of the grooved pipe. A first capillary channel is formed between the low-tooth structure and the capillary layer which are adjacently arranged, a second capillary channel is formed between the high-tooth structure and the low-tooth structure which are adjacently arranged and the capillary layer, the first capillary channel is communicated with the second capillary channel, and the channel section area of the first capillary channel is smaller than that of the second capillary channel. The first capillary channel and the second capillary channel of the high-low tooth composite heat pipe are matched so that the liquid supplementing speed can be efficiently increased, the evaporation specific surface area is larger due to the arrangement of the capillary layer, and the maximum pyrolysis power capable of being achieved by the high-low tooth composite heat pipe is increased due to the matching of the first capillary channel and the second capillary channel.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation equipment, and in particular to a high-low tooth composite heat pipe. Background Art

[0002] A groove heat pipe is a tubular heat sink with grooves formed on the inner wall surface. It is filled with working medium. The liquid working medium at the hot end of the groove heat pipe can be vaporized to form a gaseous working medium, and the gaseous working medium can liquefy and return to a liquid working medium when it flows to the cold end of the groove heat pipe. This cycle can achieve heat transfer and heat dissipation of the heat source. The groove design can accelerate the reflux of the liquid working medium by utilizing the interfacial tension of the groove.

[0003] However, with regard to the current increasingly high-performance heat source components, such as chips with increasingly high integration, which generate much more heat during operation than before, the pyrolysis power of existing ordinary groove heat pipes can no longer meet user needs.

[0004] Therefore, how to propose a heat pipe with high pyrolysis power and capable of faster heat absorption and heat dissipation is a technical problem that urgently needs to be solved. Summary of the invention

[0005] The object of the present invention is to provide a high-low tooth composite heat pipe, which has high liquid replenishment efficiency, effectively improves pyrolysis power, and can achieve faster heat absorption and heat dissipation.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A high-low tooth composite heat pipe comprises: a groove tube, the groove tube comprises a tube body, a plurality of high tooth structures arranged at intervals along the circumference of the tube body, and a plurality of low tooth structures arranged at intervals along the circumference of the tube body, the high tooth structures and the low tooth structures are both arranged on the inner wall surface of the tube body, and both are radially protruded inward along the tube body, and 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 tube cavity of the groove tube; 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 connected to the second capillary channel, and the channel cross-sectional area of ​​the first capillary channel is smaller than the channel cross-sectional area of ​​the second capillary channel.

[0008] Preferably, part of the high-tooth structure is embedded in the capillary layer.

[0009] Preferably, at least one low-tooth structure 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 convex direction is 0.05mm-1mm.

[0012] Preferably, the height H2 of the low-tooth structure in the convex direction is 0.05mm-0.25mm.

[0013] Preferably, the spacing W1 between two adjacent high-tooth structures is 0.15 mm-1.6 mm.

[0014] Preferably, the spacing 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] Beneficial effects of the present invention:

[0018] The high-low tooth composite heat pipe provided by the present invention comprises a groove tube and a capillary layer. The groove tube comprises a tube body, a plurality of high tooth structures arranged at intervals along the circumference of the tube body, and a plurality of low tooth structures arranged at intervals along the circumference of the tube body. The high tooth structure and the low tooth structure are both arranged on the inner wall surface of the tube body and are both protruded radially inward along the tube 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 tube cavity of the groove tube, a first capillary channel is formed between two adjacent low tooth structures and the capillary layer, 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 connected to the second capillary channel, and the channel cross-sectional area of ​​the first capillary channel is smaller than the channel cross-sectional area of ​​the second capillary channel. The first capillary channel formed by the high-low tooth composite heat pipe has a fast liquid creeping speed and can quickly return water. The second capillary channel has a large liquid creeping volume and can quickly replenish liquid for the first capillary channel. The first capillary channel and the second capillary channel cooperate to form a large-replenishment-fast combination, which can effectively improve the liquid replenishment speed. In addition, the setting of the capillary layer makes the high-low tooth composite heat pipe have a larger evaporation specific surface area. The combination of the two effectively improves the maximum pyrolysis power that can be achieved by the high-low tooth composite heat pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a cross-sectional view of the high-low tooth composite heat pipe provided by the present invention;

[0020] Figure 2 It is a partially enlarged view of the cross-sectional view of the high-low tooth composite heat pipe provided by the present invention;

[0021] Figure 3 is a schematic diagram of a grooved pipe provided by the present invention;

[0022] Figure 4 It is a schematic diagram of another grooved pipe provided by the present invention.

[0023] In the figure:

[0024] 100, groove tube; 110, tube body; 120, high-tooth structure; 130, low-tooth structure; 101, first capillary channel; 102, second capillary channel;

[0025] 200. Capillary layer. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0030] The present invention discloses a high-low tooth composite heat pipe, which can be used as a heat sink to dissipate heat for a heat source with heat dissipation requirements. Figures 1 to 4 As shown, the high-low tooth composite heat pipe includes a grooved tube 100 and a capillary layer 200, and the grooved tube 100 includes a tube 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 tube body 110, and is radially protruding inwardly along the tube body 110, and a plurality of high-tooth structures 120 are arranged at intervals in the circumferential direction of the tube body 110. Each low-tooth structure 130 is arranged on the inner wall surface of the tube body 110, and is radially protruding inwardly along the tube body 110, and a plurality of low-tooth structures 130 are arranged at intervals in the circumferential direction of the tube body 110. In addition, 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 tube body 110.

[0031] The capillary layer 200 is arranged in the tube cavity of the groove tube 100. Optionally, the capillary layer 200 is formed by sintering a powder layer on the tooth surface of the high-tooth structure 120 and the low-tooth structure 130 of the groove tube 100. A first capillary channel 101 is formed between the 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 connected to the second capillary channel 102, and because the height of the high-tooth structure 120 in the convex direction is different from the height of the low-tooth structure 130 in the convex direction, the channel cross-sectional area of ​​the first capillary channel 101 is smaller than the channel 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 according to the needs. 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 arranged 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 is repeated to achieve continuous heat dissipation of the heat source component.

[0033] Compared with the existing ordinary groove 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 and can quickly return liquid. The second capillary channel 102 has a large amount of liquid creeping, 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 improve the liquid replenishment speed; in addition, the setting of the capillary layer 200 makes the high-low tooth composite heat pipe have 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. And through experimental measurement, compared with a single ordinary groove 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 high-tooth structure 120 is embedded in the capillary layer 200. Part 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 also provides bones for the sintered powder layer 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 manufactured, 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 tubes, it is found that the high-low tooth composite heat pipe provided by the present invention embeds part of the high-tooth structure 120 into the capillary layer 200, so that the thermal test performance of the high-low tooth composite heat pipe decays less, and it is found that the capillary layer 200 falls off less after cutting and checking, so the performance is greatly improved, proving its high reliability.

[0035] In some embodiments, at least one low-tooth structure 130 is disposed between two adjacent high-tooth structures 120. Such a configuration 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, Figure 4 As shown, a low tooth structure 130 is provided between each two adjacent high tooth structures 120. In a specific embodiment, as Figure 3 As shown, two interval-arranged low-tooth structures 130 are arranged between each two adjacent high-tooth structures 120. Of course, in other specific embodiments, three, four or more low-tooth structures 130 may also be arranged between two adjacent high-tooth structures 120.

[0037] It should be noted that the number of low-tooth structures 130 provided between each two adjacent high-tooth structures 120 may also be different according to needs. For example, two low-tooth structures 130 are provided between two adjacent high-tooth structures 120, and three low-tooth structures 130 are provided between two adjacent high-tooth structures 120.

[0038] In some embodiments, continue to refer to Figure 3 As shown, the thickness D of the tube body 110 is 0.1 mm-2 mm. Optionally, the thickness D of the tube body 110 can 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, continue to refer to Figure 3 As shown, the height H1 of the high-tooth structure 120 in the convex direction is 0.05mm-1mm. Optionally, the height H1 of the high-tooth structure 120 in the convex direction can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, or other values ​​within the range of 0.05mm-1mm.

[0040] In some embodiments, continue to refer to Figure 3As shown, the height H2 of the low tooth structure 130 in the convex direction is 0.05mm-0.25mm. Optionally, the height H2 of the low tooth structure 130 in the convex direction can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.20mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, or other values ​​within the range of 0.05mm-0.25mm.

[0041] In some embodiments, continue to refer to Figure 3 As shown, the spacing W1 between two adjacent high-tooth structures 120 is 0.15mm-1.6mm. Optionally, the spacing W1 between two adjacent high-tooth structures 120 can be 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.20mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, or other values ​​within the range of 0.15mm-1.6mm.

[0042] In some embodiments, continue to refer to Figure 3 As shown, the spacing W2 between two adjacent low-tooth structures 130 is 0.05mm-0.4mm. Optionally, the spacing W1 between two adjacent high-tooth structures 120 can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.20mm, 0.21mm, 0.22mm m, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.30mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, 0.36mm, 0.37mm, 0.38mm, 0.39mm, 0.4mm, and can also be other values ​​in the range of 0.05mm-0.4mm.

[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, continue to refer 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 noted that: 1. The materials used to make the groove tube 100 and the capillary layer 200 are both metals, which have good thermal conductivity and are more conducive to heat dissipation. In the embodiment of the present invention, there is no restriction on the type of metal, and it can be flexibly selected according to the needs. In the embodiment of the present invention, there is no restriction on the outer diameter and length of the groove tube 100, but the optimal value of the length of the groove tube 100 is within 1M.

[0046] 2. After the powder layer of the groove tube 100 is sintered to form the capillary layer 200, conventional heat pipe manufacturing processes such as water injection and vacuuming are required to complete the final manufacturing of the high-low tooth composite heat pipe. These processes are all existing technologies and will not be described in detail here.

[0047] 3. Before or after the high-low tooth composite heat pipe is manufactured, a flattening process or a bending process can be performed to give the high-low tooth composite heat pipe a desired shape so that it can be used in combination with other accessories. The accessories here include but are not limited to a heat source component provided at the hot end of the groove tube 100 and a heat dissipation structure provided at the cold end of the groove tube 100.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A high-low tooth composite heat pipe, characterized in that: include: A grooved pipe (100), the grooved pipe (100) comprising a pipe body (110), a plurality of high-tooth structures (120) arranged at intervals along the circumference of the pipe body (110), and a plurality of low-tooth structures (130) arranged at intervals along the circumference of the pipe body (110), the high-tooth structures (120) and the low-tooth structures (130) being both arranged on the inner wall surface of the pipe body (110) and both protruding radially inwardly along the pipe body (110), the height of the high-tooth structures (120) in the protruding direction being greater than the height of the low-tooth structures (130) in the protruding direction; A capillary layer (200), wherein the capillary layer (200) is disposed in the lumen of the groove tube (100); A first capillary channel (101) is formed between the 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 connected to the second capillary channel (102), and the channel cross-sectional area of ​​the first capillary channel (101) is smaller than the channel 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, characterized in that: At least one of the low-tooth structures (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 convex direction is 0.05 mm-1 mm.

6. The high-low tooth composite heat pipe according to claim 1, characterized in that: The height H2 of the low-tooth structure (130) in the convex direction is 0.05 mm-0.25 mm.

7. The high-low tooth composite heat pipe according to claim 1, characterized in that: The spacing W1 between two adjacent high-tooth structures (120) is 0.15 mm to 1.6 mm.

8. The high-low tooth composite heat pipe according to claim 1, characterized in that: 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, characterized in that: 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°.

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