A composite heat pipe for high-efficiency heat dissipation
By setting a second water storage area and a third capillary section inside the heat pipe and optimizing the capillary structure, the thermal resistance and flow resistance problems caused by copper powder refinement in ultra-long heat pipes are solved, achieving efficient heat circulation and conduction and ensuring the heat dissipation performance of the heat pipe.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN TONGYU ELECTRONICS CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-06-30
AI Technical Summary
Existing ultra-long heat pipes, after using finer copper powder, have increased contact area, leading to increased contact thermal resistance, narrower flow channels, hindering heat transfer, and reducing heat dissipation effect.
A second water storage area is set in the heat pipe body and connected to the heating area, and a third capillary is set in the ineffective end. After the working medium is vaporized in the heating area, it smoothly enters the second water storage area for heat exchange. By combining the capillary design with different porosities and shapes, the flow structure is optimized, the flow resistance is reduced, and the thermal cycle efficiency is enhanced.
It improves the internal heat circulation and conduction efficiency of the heat pipe, prevents local dry burning, ensures the heat dissipation efficiency of the ultra-long heat pipe, and achieves efficient heat dissipation without the need to use finer copper powder.
Smart Images
Figure CN224439490U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat pipe technology, and in particular to a composite heat pipe with high efficiency in heat dissipation. Background Technology
[0002] With the rapid development of modern technology, electronic devices are constantly moving towards higher performance and greater integration, which leads to a sharp increase in the heat generated during operation. If this heat cannot be dissipated effectively and in a timely manner, it will seriously affect the performance, stability, and lifespan of electronic devices, and may even cause damage. Copper powder grooved composite heat pipes, as a highly efficient heat conduction element, have been widely used in many fields due to their excellent heat dissipation performance.
[0003] Currently, during the operation of a heat pipe, heat is primarily transferred through the evaporation section, where the working medium is vaporized by absorbing heat. The vapor then flows to the condensation section under pressure difference, releasing heat and condensing into a liquid. It then flows back to the evaporation section via capillary action or gravity, thus completing the heat transfer cycle. However, in the manufacturing of ultra-long heat pipes, to ensure high heat transfer efficiency, finer copper powder is often used. However, the use of finer copper powder in existing ultra-long heat pipes increases the contact area and thus the contact thermal resistance. Furthermore, the fine copper powder narrows the flow channels inside the heat pipe, increasing the resistance to the flow of the working medium and further hindering heat transfer, thereby reducing the heat dissipation effect of the heat pipe.
[0004] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content
[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a composite heat pipe with high-efficiency heat dissipation.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A high-efficiency heat dissipation composite heat pipe includes a heat pipe body; one end of the heat pipe body has an ineffective end; the heat pipe body contains a heating zone, a first water storage zone, and a condensation zone connected end to end in sequence; the ineffective end is provided with a second water storage zone, which is connected end to end with the heating zone and is in communication with it.
[0008] The heating zone is provided with a first groove, and the first groove is provided with a first capillary; the first water storage zone is provided with a second groove, and the second groove is provided with a second capillary; the condensation zone is provided in a third groove; the second water storage zone is provided with a fourth groove, and the fourth groove is provided with a third capillary; the porosity of the first capillary is lower than that of the second capillary and the third capillary.
[0009] As further explained, the fourth groove is integrally sintered with the third capillary; the third capillary has a conical cavity inside.
[0010] As further explained, the third capillary is integrally formed from the first coarse copper powder; the first coarse copper powder has a mesh size of 60-80 mesh.
[0011] As further explained, the cross-sectional shape of the third capillary is a honeycomb or polygonal shape that is uniformly or randomly distributed.
[0012] As further explained, the first capillary is integrally sintered with the first groove; the second capillary is integrally sintered with the second groove; the cross-sectional shape of the first capillary is a uniformly distributed or randomly distributed honeycomb or polygonal shape, and the cross-sectional shape of the second capillary is a distributed or randomly distributed honeycomb or polygonal shape.
[0013] As further explained, the first capillary is integrally made of a second coarse copper powder with a mesh size of 60-80; the second capillary is integrally supported by fine copper powder with a mesh size of 100-150.
[0014] As a further explanation, the outer side of the third groove is provided with a powder-free air passage for reducing the thermal resistance of the heat pipe.
[0015] As further explained, the first, second, third, and fourth grooves are all designed with trapezoidal, triangular, rectangular, or irregular shapes.
[0016] As a further explanation, the outer side of the condensation zone is provided with heat dissipation fins or a heat spreader that are closely fitted thereto.
[0017] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:
[0018] By setting a second water storage area within the ineffective end, and connecting this second water storage area to the heating element, the ineffective end is successfully integrated into the heat pipe's internal thermal circulation system. This means that after the working medium is heated and vaporized in the heating zone, it can smoothly enter the second water storage area at the ineffective end through the connected structure. Under the action of the third capillary, the vaporized working medium undergoes sufficient heat exchange with the surrounding environment, achieving condensation and reflux. This allows for smoother heat circulation and transfer within the heat pipe, significantly improving its internal thermal circulation efficiency. Simultaneously, by setting a second water storage area, which interacts with the first water storage area, the heat pipe has two water storage areas, further improving its heat transfer efficiency and effectively preventing localized burning-out and subsequent thermal aging. Compared to traditional heat pipes, this design eliminates the need for finer copper powder, enabling ultra-long composite heat pipes while maintaining efficient heat dissipation. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the overall structure of a high-efficiency heat dissipation composite heat pipe provided by this utility model;
[0021] Figure 2 A schematic diagram of the internal structure of a high-efficiency heat dissipation composite heat pipe provided by this utility model;
[0022] Figure 3 A schematic diagram of the internal structure of the heating zone provided by this utility model;
[0023] Figure 4 A schematic diagram of the internal structure of the first water storage area provided by this utility model;
[0024] Figure 5 A schematic diagram of the internal structure of the condensation zone provided by this utility model;
[0025] Figure 6 A schematic diagram of the internal structure of the second water storage area provided by this utility model.
[0026] The following are the labeling elements in the figure:
[0027] 10. Heat pipe body; 11. Ineffective end;
[0028] 20. Heating zone; 21. First groove; 22. First capillary;
[0029] 30. First water storage area; 31. Second trench; 32. Second capillary;
[0030] 40. Condensation zone; 41. Third trench;
[0031] 50. Second water storage area; 51. Fourth trench; 52. Third capillary. Detailed Implementation
[0032] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not 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 application.
[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0037] In one embodiment of this utility model, such as Figure 1-6 As shown, a high-efficiency heat dissipation composite heat pipe is provided, including a heat pipe body 10, and a coolant is disposed inside the heat pipe body 10. One end of the heat pipe body 10 has an ineffective end 11. A heating zone 20, a first water storage zone 30, and a condensation zone 40 are connected end to end within the heat pipe body 10. A second water storage zone 50 is provided in the ineffective end 11, and the second water storage zone 50 is connected to the heating zone 20 end to end and is in communication with it.
[0038] The heating zone 20 has a first groove 21, and a first capillary 22 is provided on the first groove 21. The first water storage zone 30 has a second groove 31, and a second capillary 32 is provided in the second groove 31. The condensation zone 40 is located in the third groove 41. The second water storage zone 50 has a fourth groove 51, and a third capillary 52 is provided in the fourth groove 51. The porosity of the first capillary 22 is lower than that of the second capillary 32 and the third capillary 52.
[0039] By setting a second water storage area 50 within the ineffective end 11, and connecting the second water storage area 50 to the heating element, the ineffective end 11 is successfully integrated into the heat pipe's internal heat circulation system. That is, after the working medium is heated and vaporized in the heating zone 20, it can smoothly enter the second water storage area 50 of the ineffective end 11 through the connected structure. Under the action of the third capillary 52, the vaporized working medium undergoes sufficient heat exchange with the surrounding environment, achieving condensation and reflux. This allows heat to circulate and transfer more smoothly within the heat pipe, greatly improving the heat circulation efficiency. Simultaneously, by setting the second water storage area 50, and in conjunction with the first water storage area 30, the heat pipe has two water storage areas, further improving the heat transfer efficiency of the heat pipe and effectively preventing localized burning-out of the heat pipe leading to heat conduction aging. Compared to traditional heat pipes, it eliminates the need for finer copper powder to achieve an ultra-long composite heat pipe while maintaining its heat dissipation efficiency.
[0040] In this embodiment, the first groove 21, the second groove 31, the third groove 41 and the fourth groove 51 have the same size and the same shape, and can all be trapezoidal, triangular, rectangular or irregular structure.
[0041] Preferably, the fourth groove 51 and the third capillary 52 are integrally sintered. The third capillary 52 has a conical cavity. By setting the conical cavity, the third capillary 52 can have a large vapor flow cavity after sintering, which improves the heat conduction efficiency of the ineffective end 11, thereby improving the heat dissipation efficiency of the composite heat pipe.
[0042] Furthermore, the third capillary 52 is integrally formed from the first coarse copper powder. The mesh size of the first coarse copper powder is 60-80 mesh. In this embodiment, the mesh size of the first coarse copper powder can be combined in different ways according to actual production conditions, so that the composite heat pipe can meet the needs of different applications.
[0043] Furthermore, the cross-sectional shape of the third capillary 52 is a honeycomb or polygonal shape that is uniformly or randomly distributed.
[0044] Preferably, the first capillary 22 and the first groove 21 are integrally sintered. The second capillary 32 and the second groove 31 are integrally sintered. The cross-sectional shape of the first capillary 22 is a uniformly distributed or randomly distributed honeycomb or polygonal shape, and the cross-sectional shape of the second capillary 32 is a distributed or randomly distributed honeycomb or polygonal shape. In this embodiment, the corresponding cross-sectional shape is selected according to different occasions. By optimizing the cross-sectional shape of the capillary structure, the flow resistance of the fluid in the capillary structure is reduced, thereby improving the heat conduction efficiency of the composite heat pipe and reducing the risk of thermal failure caused by local dry burning.
[0045] Furthermore, the first capillary 22 is integrally formed from second coarse copper powder, the mesh size of which is 60-80 mesh. The second capillary 32 is integrally supported by fine copper powder, the mesh size of which is 100-150 mesh. In this embodiment, the mesh sizes of the fine and coarse copper powders can be combined in different ways according to actual production conditions, so that the composite heat pipe can meet the needs of different applications.
[0046] Preferably, the outer side of the third groove 41 is provided with a powder-free air channel (not shown in the figure) for reducing the thermal resistance of the heat pipe. By setting the powder-free air channel, the internal thermal resistance of the heat pipe is effectively reduced, the heat dissipation efficiency is improved, and the problem of thermal conduction failure caused by local dry burning is avoided.
[0047] Preferably, in another embodiment, the dimensions of the first groove 21, the second groove 31, the third groove 41, and the fourth groove 51 are designed to decrease sequentially along the fluid flow direction. The size of the first groove 21 is larger than the size of the second groove 31. The size of the second groove 31 is larger than the size of the third groove 41. The size of the first groove 21 is larger than the size of the fourth groove 51. By setting the stepped groove sections with gradually decreasing dimensions, the flow resistance of the fluid in the grooves is reduced, the heat transfer efficiency is improved, and the thermal resistance is further reduced.
[0048] Preferably, the first groove 21, the second groove 31, the third groove 41, and the fourth groove 51 are all arranged in a trapezoidal, triangular, rectangular, or irregular shape. By optimizing the shape design of each groove, the eddy currents and turbulence of the fluid in the grooves are reduced, the heat transfer efficiency is improved, and the thermal resistance is further reduced.
[0049] Preferably, the outer side of the condensation zone 40 is provided with heat dissipation fins or a heat spreader (not shown in the figure) that are in close contact with it. By setting up heat dissipation fins or a heat spreader, the heat dissipation efficiency of the heat pipe is further improved, the operating temperature of the heat pipe is reduced, thereby reducing the risk of thermal failure caused by local dry burning, and at the same time, the reliability and stability of the heat pipe are also improved.
[0050] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.
Claims
1. A composite heat pipe with high-efficiency heat dissipation, characterized in that, The device includes a heat pipe body containing a coolant; one end of the heat pipe body has an ineffective end; the heat pipe body contains a heating zone, a first water storage zone, and a condensation zone connected end to end in sequence; the ineffective end contains a second water storage zone, which is connected end to end to the heating zone and is in communication with it. The heating zone is provided with a first groove, and the first groove is provided with a first capillary; the first water storage zone is provided with a second groove, and the second groove is provided with a second capillary; the condensation zone is provided in a third groove; the second water storage zone is provided with a fourth groove, and the fourth groove is provided with a third capillary; the porosity of the first capillary is lower than that of the second capillary and the third capillary.
2. The high-efficiency heat dissipation composite heat pipe according to claim 1, characterized in that, The fourth groove is integrally sintered with the third capillary; the third capillary has a conical cavity inside.
3. The high-efficiency heat dissipation composite heat pipe according to claim 2, characterized in that, The third capillary is integrally formed from the first coarse copper powder; the first coarse copper powder has a mesh size of 60-80 mesh.
4. The high-efficiency heat dissipation composite heat pipe according to claim 2 or 3, characterized in that, The cross-sectional shape of the third capillary is either uniformly distributed or randomly distributed in a honeycomb or polygonal pattern.
5. The high-efficiency heat dissipation composite heat pipe according to claim 1, characterized in that, The first capillary is integrally sintered with the first groove; the second capillary is integrally sintered with the second groove; the cross-sectional shape of the first capillary is a uniformly distributed or randomly distributed honeycomb or polygonal shape, and the cross-sectional shape of the second capillary is a distributed or randomly distributed honeycomb or polygonal shape.
6. The high-efficiency heat dissipation composite heat pipe according to claim 1 or 5, characterized in that, The first capillary is integrally made of a second coarse copper powder with a mesh size of 60-80; the second capillary is integrally supported by fine copper powder with a mesh size of 100-150.
7. The high-efficiency heat dissipation composite heat pipe according to claim 1, characterized in that, The outer side of the third groove is provided with a powder-free gas channel for reducing the thermal resistance of the heat pipe.
8. The high-efficiency heat dissipation composite heat pipe according to claim 1, characterized in that, The first, second, third, and fourth grooves are all designed with trapezoidal, triangular, rectangular, or irregular shapes.
9. The high-efficiency heat dissipation composite heat pipe according to claim 1, characterized in that, The outer side of the condensation zone is provided with heat dissipation fins or heat spreaders that are closely fitted to it.