Middle-section powder-filled heat pipe and center rod for processing and forming middle-section powder-filled heat pipe

Abstract

According to the heat pipe with the powder filled in the middle section, the whole heat pipe is in a U shape after the two ends of the heat pipe are bent, the heat pipe comprises a first condensation section, a first heat insulation section, an evaporation section, a second heat insulation section and a second condensation section, the first condensation section and the second condensation section are located at the two ends of the heat pipe, and the first condensation section and the second condensation section are parallel and perpendicular to the evaporation section. The first heat insulation section and the second heat insulation section are located at the bent corners of the two sides of the evaporation section respectively, the heat pipe comprises a sealed hollow shell, a steam flow channel arranged in the extending direction of the heat pipe is formed in the shell, a proper amount of working liquid is contained in the steam flow channel, and capillary structures are attached to the positions, corresponding to the first heat insulation section, the evaporation section and the second heat insulation section, of the inner wall of the shell. The utility model further relates to a center rod for processing and forming the middle-section powder-filled heat pipe, after the center rod is inserted into the pipe body, copper powder is added into the pipe body, sintering operation is carried out, and the middle-section powder-filled heat pipe is processed and formed.

Description

Technical Field

[0001] This utility model relates to the field of heat pipe technology, and more particularly to a mid-section powder-filled heat pipe and a center rod for processing and forming the mid-section powder-filled heat pipe. Background Technology

[0002] With the rapid development of electronic technology, the miniaturization and weight reduction of electronic devices, as well as the continuous increase in the power density of electronic components, generate a large amount of heat.

[0003] In existing technologies, a capillary structure is created inside the heat pipe by inserting a central rod, which is then used for further heat dissipation. However, due to the continuous upgrading of high-power electronic products and the increased operating speed of electronic chips, the resulting high heat flux density has seriously affected the performance and stability of electronic devices. In existing technologies, the central part of the heat pipe is prone to insufficient heat conduction, affecting the heat dissipation efficiency. To ensure the stable operation of electronic devices and extend their service life, an efficient heat dissipation solution is urgently needed. Utility Model Content

[0004] To solve the above problems, this utility model provides a mid-section powder-filled heat pipe and a center rod for processing and forming the mid-section powder-filled heat pipe.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The present invention relates to a mid-section powder-filled heat pipe, which is U-shaped after both ends are bent. The heat pipe includes a first condensing section, a first insulating section, an evaporating section, a second insulating section, and a second condensing section. The first and second condensing sections are located at both ends of the heat pipe, are parallel to each other and perpendicular to the evaporating section, and are located at the bends on both sides of the evaporating section. The heat pipe includes a sealed hollow shell, in which a vapor flow channel is formed along the extension direction of the heat pipe and is filled with a suitable amount of working liquid. Capillary structures are attached to the inner walls of the shell corresponding to the first insulating section, the evaporating section, and the second insulating section.

[0006] Preferably, the heat pipe has a first sealing end and a second sealing end at both ends, the first sealing end and the second sealing end sealing the steam flow channel, and the first sealing end and the second sealing end having a conical structure.

[0007] This utility model also relates to a center rod for processing and forming a mid-section powder-filled heat pipe. After the center rod is inserted into the tube body, copper powder is added to the inside of the tube body and sintered to form the mid-section powder-filled heat pipe. The center rod includes an end, a first connecting rod, and a second forming rod. The end, the first connecting rod, and the second forming rod are connected in sequence. The diameter of the center rod gradually decreases from the end to the second forming rod.

[0008] Preferably, the end, the first connecting rod, and the second forming rod are all cylinders, and the center points of the end, the first connecting rod, and the second forming rod are located on the same axis.

[0009] Preferably, the cross-sectional diameter of the end is D1, the cross-sectional diameter of the first connecting rod is D2 (5.5 mm), and the cross-sectional diameter of the second forming rod is D3 (4.4 mm), where D1 > D2 > D3.

[0010] Preferably, the distance L1 between the outer wall surface of the first connecting rod and the edge of the end is 2mm.

[0011] Preferably, the height H1 of the end is 2 mm.

[0012] Preferably, the edge of the first connecting rod near the second forming rod has a rounded chamfer.

[0013] The beneficial effects of this invention are as follows: In this invention, a novel central rod is inserted into the tube body and copper powder is added and sintered, forming a capillary structure on the inner wall surface of the middle part of the tube body, which is then processed to form a mid-section powder-filled heat pipe. The capillary structure facilitates the faster conduction of heat from the middle part of the mid-section powder-filled heat pipe to the heat dissipation end, thereby improving the heat dissipation efficiency of the mid-section powder-filled heat pipe. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the powder-filled heat pipe in the middle section of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the powder-filled heat pipe in the middle section of this utility model.

[0016] Figure 3 This is a schematic diagram of the structure of the central rod of this utility model.

[0017] Figure 4 This is a schematic diagram of the planar structure of the central rod of this utility model.

[0018] Figure 5 This is a cross-sectional view of the internal structure of the tube body of this utility model.

[0019] Figure 6 This is a cross-sectional view of the central rod of this utility model after it has been inserted into the tube.

[0020] Figure 7 This is a utility model Figure 6 Enlarged view of point A in the middle.

[0021] Figure 8 This is a schematic diagram of the longitudinal structure of the central rod inserted into the tube body of this utility model.

[0022] Figure 9This is a schematic diagram of the capillary structure formed on the inner wall surface of the middle part of the tube after the sintering process of this utility model.

[0023] Figure 10 This is a utility model Figure 9 Enlarged view of point B in the image.

[0024] Figure Labels

[0025] 1. Center rod; 11. End; 12. First connecting rod; 121. Rounded chamfer; 13. Second forming rod;

[0026] 2. Tube body; 21. Head; 22. Tail; 23. Cavity; 231. Micro-gap; 232. Sintering section;

[0027] 3. Middle section powder-filled heat pipe; 31. First condensing section; 32. First adiabatic section; 33. Evaporation section; 34. Second adiabatic section; 35. Second condensing section; 36. Steam flow channel; 37. Capillary structure; 38. First sealing end; 39. Second sealing end. Detailed Implementation

[0028] Please see Figure 1-10 As shown, this utility model relates to a mid-section powder-filled heat pipe. The heat pipe is U-shaped after both ends are bent. The heat pipe includes a first condensing section 31, a first insulating section 32, an evaporating section 33, a second insulating section 34, and a second condensing section 35. The first condensing section 31 and the second condensing section 35 are located at both ends of the heat pipe. The first condensing section 31 and the second condensing section 35 are parallel and perpendicular to the evaporating section 33. The first insulating section 32 and the second insulating section 34 are located at the bends on both sides of the evaporating section 33. The first insulating section 32 and the second insulating section 34 reduce heat loss, and the heat is transferred to the first condensing section 31 and the second condensing section 35 on both sides for condensation.

[0029] The heat pipe includes a sealed hollow shell, in which a vapor channel 36 is formed along the extension direction of the heat pipe and contains an appropriate amount of working liquid. Capillary structures 37 are attached to the inner walls of the shell corresponding to the first insulating section 32, the evaporation section 33, and the second insulating section 34. The capillary structures 37 enable the heat in the middle of the heat pipe to be dispersed to the heat dissipation ends on both sides more quickly, thereby improving the heat dissipation efficiency.

[0030] Furthermore, in this embodiment, the length L2 of the molded middle-section powder-filled heat pipe 3 is 116.8 mm, and its height H2 is 83 mm.

[0031] Furthermore, in this embodiment, the length L3 of the evaporation section 33 is 68.8 mm.

[0032] Furthermore, in this embodiment, the bending radius R of the first insulation section 32 and the second insulation section 34 is 18mm, and the height H3 of the first insulation section 32 and the second insulation section 34 is 24mm.

[0033] The heat pipe has a first sealing end 38 and a second sealing end 39 at both ends. The first sealing end 38 and the second sealing end 39 seal the steam flow channel 36. The first sealing end 38 and the second sealing end 39 have a conical structure.

[0034] Furthermore, in this embodiment, the height H3 between the first sealing end 38 and the second sealing end 39 is 8mm.

[0035] To achieve the above objectives, a heat pipe with a middle section filled with powder is manufactured. This utility model also relates to a center rod for manufacturing a middle section filled with powder. After the center rod is inserted into the corresponding tube body, copper powder is added to the inside of the tube body and sintered to finally form a middle section filled with powder.

[0036] The central rod includes an end 11, a first connecting rod 12, and a second forming rod 13. The end 11, the first connecting rod 12, and the second forming rod 13 are connected in sequence. The diameter of the central rod 1 gradually decreases from the end 11 to the second forming rod 13, forming a stepped shaft shape.

[0037] Furthermore, the end piece 11, the first connecting rod 12, and the second forming rod 13 are cylindrical, and the center point of the first connecting rod 12 and the center point of the second forming rod 13 are located on the same axis. The cross-sectional diameter of the end piece 11 is D1, the cross-sectional diameter of the first connecting rod 12 is D2 (5.5 mm), and the cross-sectional diameter of the second forming rod 13 is D3 (4.4 mm). The diameter D1 of the end piece 11 is greater than the diameter D2 of the first connecting rod 12, and the diameter D2 of the first connecting rod 12 is greater than the diameter D3 of the second forming rod 13, i.e., D1>D2>D3.

[0038] Furthermore, the edge of the first connecting rod 12 near the second forming rod 13 is provided with a rounded chamfer 121.

[0039] Furthermore, the height H1 of the end 11 is 2mm, the first connecting rod 12 is disposed on the end 11, the center point of the first connecting rod 12 and the center point of the end 11 are located on the same axis, and the distance L1 between the outer wall surface of the first connecting rod 12 and the edge of the end 11 is 2mm.

[0040] In this embodiment, the two ends of the tube 2 are a head 21 and a tail 22, respectively. The head 21 and the tail 22 are respectively provided with openings. The tube 2 has a cavity 23 inside that communicates with the openings at both ends. The inner diameter D4 of the cavity 23 is smaller than the diameter D1 of the end 11. The inner diameter D4 of the cavity 23 is slightly larger than or equal to the diameter D2 of the first connecting rod 12, that is, D1>D4≥D2.

[0041] Furthermore, the length L4 of the central rod 1 is longer than the length L5 of the tube body 2, so as to facilitate the adjustment of the length of the formed capillary structure 37 according to the heat dissipation requirements of the mid-section powder-filled heat pipe 3.

[0042] When the center rod 1 is fully inserted into the tube 2, the end 11 of the center rod 1 abuts against the head 21 of the tube 2, and the end 11 seals the head 21 of the tube. The first connecting rod 12 and the second forming rod 13 are located inside the cavity 23. The second forming rod 13 protrudes from the tail 22 opening of the tube 2. At this time, a small gap 231 may be formed between the first connecting rod 12 and the inner wall of the cavity 23, and a sintered section 232 is formed between the second forming rod 13 and the inner wall of the cavity 23.

[0043] In this embodiment, the copper powder used is coarse copper powder, which is larger than the micro-gap 231. Therefore, when the coarse copper powder is placed into the tube 2, it only accumulates within the sintering section. The user can place the corresponding amount of coarse copper powder according to the required capillary structure 37 length for sintering. After the tube 2 is sintered, a capillary structure 37 is formed on the inner wall surface of the middle part of the cavity 23.

[0044] The process of constructing a mid-section powder-filled heat pipe 3 using a central rod 1 and a tube body 2 in this utility model is as follows:

[0045] 1. Insert the center rod 1 into the tube 2 and fill it with coarse copper powder of the corresponding length so that the coarse copper powder enters the sintering section 232.

[0046] 2. Perform sintering on tube 2 to form a capillary structure 37 on the inner wall surface of the middle part of tube 2.

[0047] 3. Pull out the center bar 1, and perform head reduction, tail reduction, and tail welding operations on the tube body 2.

[0048] IV. Vacuum water injection;

[0049] V. Forming of the middle section powder-filled heat pipe 3;

[0050] VI. Test the mass of the powder-filled heat pipe 3 in the middle section.

[0051] This utility model relates to a central rod for forming a powder-filled heat pipe in the middle section. The central rod 1 is inserted into the tube body 2 and copper powder is added and sintered, forming a capillary structure 37 on the inner wall surface of the middle section of the tube body 2. This is then further processed to form the powder-filled heat pipe 3 in the middle section. The capillary structure 37 facilitates faster heat transfer from the middle section of the powder-filled heat pipe 3 to the heat dissipation end, thus improving the heat dissipation efficiency of the powder-filled heat pipe 3.

[0052] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A mid-section powder-filled heat pipe, characterized by: The heat pipe is in U shape after bending of two ends, the heat pipe comprises a first condensing section, a first heat insulation section, an evaporating section, a second heat insulation section and a second condensing section, the first condensing section and the second condensing section are located at two ends of the heat pipe, the first condensing section and the second condensing section are parallel and perpendicular to the evaporating section, the first heat insulation section and the second heat insulation section are respectively located at the bending angles on two sides of the evaporating section, the heat pipe comprises a sealed hollow shell, a steam flow channel is arranged in the shell along the extending direction of the heat pipe, a proper amount of working liquid is arranged in the steam flow channel, and a capillary structure is attached to the inner wall of the shell corresponding to the first heat insulation section, the evaporating section and the second heat insulation section.

2. A mid-section powder-filling heat pipe according to claim 1, characterized in that: The heat pipe is provided with a first sealing end and a second sealing end at two ends, the first sealing end and the second sealing end seal the steam flow channel, and the first sealing end and the second sealing end are in a conical structure.

3. A center rod for processing a middle section powder-filled heat pipe, wherein the center rod is inserted into a pipe body, copper powder is added to the inside of the pipe body, and sintering is performed, thereby processing the middle section powder-filled heat pipe according to any one of claims 1 to 2, characterized in that: The center rod comprises an end portion, a first connecting rod and a second forming rod, the end portion, the first connecting rod and the second forming rod are sequentially connected, and the diameter of the center rod gradually decreases from the end portion to the second forming rod.

4. The center rod for processing the middle section powder- filled heat pipe according to claim 3, characterized in that: The end portion, the first connecting rod and the second forming rod are cylindrical bodies, and the center points of the end portion, the first connecting rod and the second forming rod are located on the same axis.

5. The center rod for processing the middle section powder- filled heat pipe according to claim 4, characterized in that: The cross-sectional diameter of the end portion is D1, the cross-sectional diameter of the first connecting rod is D2 and is 5.5 mm, the cross-sectional diameter of the second forming rod is D3 and is 4.4 mm, and D1>D2>D3.

6. The center rod for processing the heat pipe with the middle section powder filling according to claim 4, characterized in that: The distance between the outer wall surface of the first connecting rod and the edge of the end portion is L1 and is 2 mm.

7. The center rod for processing the heat pipe with the middle section filled with powder according to claim 4, characterized in that: The height of the end portion is H1 and is 2 mm.

8. The center rod for processing the heat pipe with the middle section filled with powder according to claim 4, characterized in that: An arc chamfer is arranged on the edge of one end of the first connecting rod close to the second forming rod.

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