TWI780923B - Heat pipe capable of resisting saturated vapor pressure and manufacturing method thereof - Google Patents

Abstract

The invention relates to a heat pipe capable of resisting saturated vapor pressure and a manufacturing method thereof, which comprises a pipe body, which is a hollow closed pipeline structure and has a ring inner wall inside; Ring the inner wall and extend along the axial direction of the tube body; by protruding the support structure inside the tube body, the overall rigidity of the heat pipe can be increased without additional support structures, and the tube body has the ability to resist saturation The pressure of the steam pressure meets the requirements of the vehicle regulations and can be installed in the high temperature area of the engine room.

Description

Heat pipe capable of resisting saturated vapor pressure and its manufacturing method

The invention relates to a heat pipe, especially a heat pipe capable of resisting saturated vapor pressure.

The main structure of the heat pipe in the prior art is a closed hollow tube body containing a working fluid, and by heating one end and releasing heat at the other end, the internal working fluid can be continuously circulated and convected through the two-phase change of liquid and vapor to achieve heat transfer. The effect of heat, there is an ultra-thin heat pipe such as Taiwan Invention Publication No. TW 201038896A1, which includes a flat metal tube and at least one powder sintered part. The flat metal tube includes an upper side tube wall, a lower side tube wall and two side tube walls , each side tube wall connects the upper side tube wall and the lower side tube wall and is located between the upper side tube wall and the lower side tube wall. The powder sintering part extends along the axial direction of the flat metal tube and is partially formed on the upper side tube wall and the lower side One of the tube wall and each side tube wall forms a steam channel space on at least one side of the powder sintering part.

However, when the aforementioned heat pipe is applied to a vehicle, it is mainly used for heat dissipation of the cooling system and electronic equipment, and the cooling system and electronic equipment are mostly arranged in a high-temperature engine room, so when the engine is in a high-temperature environment (about greater than 180°C) or in a state of heavy load, it is easy to cause high temperature and high pressure inside the heat pipe, and when the pressure is greater than the maximum pressure that the wall structure of the heat pipe can withstand, it will easily cause the pipe to break; therefore, the prior art The existing heat pipe has the aforementioned problems and shortcomings in its overall structure, and it needs to be improved.

In view of the deficiencies in the prior art, the present invention provides a heat pipe capable of resisting saturated vapor pressure and a manufacturing method thereof, which improves the rigidity of the pipe body by protruding support portions in the pipe body.

In order to achieve the above-mentioned purpose of the invention, the technical means adopted in the present invention is to design a heat pipe capable of resisting saturated vapor pressure, which includes: a pipe body, which is a hollow closed pipeline structure and has a ring inner wall inside. The cross-section of the body is elliptical. Two sintered parts are arranged in the tube body, and each sintered part extends along the axial direction of the tube body; a support part protrudes from the ring inner wall of the tube body and extends The pipe body extends in the axial direction, two radially opposite ends of the support portion are respectively connected to the ring inner wall of the pipe body, and each of the sintered portions is located on two opposite sides of the support portion.

In order to achieve the above-mentioned purpose of the invention, the technical means further adopted by the present invention is to design a heat pipe manufacturing method capable of resisting saturated vapor pressure, which includes: a. a central rod is placed in the pipe body, and the central rod is a cross-sectional shape of ten Glyph-shaped columnar body, the central rod divides the inner space of the tube into four spaces; b. fills the spaces formed between the central rod and the tube with copper powder; c. the copper powder for sintering; d: Before the copper powder is sintered and solidified, remove the center rod, and at this time, a four-sintered unit is formed in the tube body; e: Put it in the space formed after removing the center rod The support part; f: Before the sintering unit is solidified, the pipe body is pressed with a counterweight, so that the upper and lower opposite sintering units are connected to form a complete sintering unit, and for the sintering unit The position of the pipe body relative to the support part is welded.

Furthermore, in the heat pipe capable of resisting saturated vapor pressure, each of the sintered parts is a capillary structure formed by sintering copper powder.

Furthermore, in the heat pipe capable of resisting saturated vapor pressure, the supporting part is a rectangular strip.

Furthermore, in the heat pipe capable of resisting saturated vapor pressure, a plurality of drainage holes are penetrated through the support part, and each drainage hole is arranged at intervals on the support part.

The advantage of the present invention is that, by protruding the support structure inside the tube body, the overall rigidity of the heat pipe can be increased without additional support structures, and the tube body can resist saturated steam pressure, which meets the requirements of vehicle regulations. It can be installed in the high temperature area of the engine room.

10: heat pipe

11: tube body

11B: tube body

11A: tube body

111: ring inner wall

111A: ring inner wall

111B: ring inner wall

12: Support part

12A: support part

12B: support part

121B: drainage hole

13B: Sintering part

20: base

21: perforation

30: cooling fins

40B: Center rod

Fig. 1 is a perspective view of the first embodiment of the present invention.

Fig. 2 is a sectional view of the first embodiment of the present invention.

Fig. 3 is a three-dimensional appearance view of the second embodiment of the present invention.

Fig. 4 is a sectional view of the second embodiment of the present invention.

Fig. 5 is a schematic diagram of the use of the present invention.

Fig. 6 is a schematic diagram of manufacturing steps a to c of the present invention.

Fig. 7 is a schematic diagram of manufacturing step e of the present invention.

Fig. 8 is a schematic diagram of the third embodiment of the present invention.

Fig. 9 is a partial sectional view of the third embodiment of the present invention.

The technical means adopted by the present invention to achieve the predetermined invention objectives are further described below in conjunction with the drawings and preferred embodiments of the present invention.

Please refer to FIG. 1 and FIG. 2 , which is a heat pipe 10 capable of resisting saturated vapor pressure according to a first embodiment of the present invention, which includes a pipe body 11 and a support portion 12 .

The tube body 11 is a hollow and closed pipeline structure. The inside of the tube body 11 has a ring inner wall 111. In this embodiment, the cross section of the tube body 11 is circular, but it is not limited thereto. The shape can be changed according to the needs of the user. The inner wall 111 of the tube body 11 is provided with a capillary structure (not shown in the drawings). This is a heat pipe structure in the prior art, so it will not be described in detail.

The support part 12 is protrudingly provided on the ring inner wall 111 of the pipe body 11 and extends along the axial direction of the pipe body 11. In this embodiment, the support part 12 is in the shape of a rectangular elongated rib, but it is not limited to this , the shape of the support portion 12 can be changed according to user requirements.

Please refer to Fig. 3 and Fig. 4, which is the second embodiment of the present invention, wherein the cross section of the pipe body 11A is approximately elliptical, specifically, an oblate pipe is formed after the round pipe is struck and stressed. , and the two radially opposite ends of the support portion 12A are respectively connected to the annular inner wall 111A of the tubular body 11A, and the connection method can be connected by diffusion welding, but not limited thereto.

When the present invention is in use, please refer to Fig. 5, and it is illustrated by taking an automobile chip heat dissipation module as an example. The automobile chip heat dissipation module includes a base 20, a plurality of heat pipes 10 of the present invention and a plurality of heat dissipation fins 30, and the base 20 It is one piece and runs through a perforation 21. The perforation 21 is a rectangular hole and its shape corresponds to the shape of the automobile chip. The heat pipes 10 of the present invention are arranged adjacently and fixed on one side of the base 20 from one end of the perforation 21 to the other end. Extending, each heat pipe 10 of the present invention is fixed on each heat dissipation fin 30, and each heat pipe 10 of the present invention is simultaneously formed with a tube body 11A of a flat section and a tube body 11 of two circular sections, the flat section Section 11A is an embodiment in which the cross section of the pipe body 11A is approximately elliptical. The pipe body 11 in the circular section is an embodiment in which the cross section of the pipe body 11 is circular. The pipe body 11A in the flat section is located at Between the tubes 11 of each circular section and the tube 11A of the flat section is adjacent to the perforation 21, one side is used to be attached to the automotive wafer (not shown in the drawings), and the other side is connected to each The heat dissipation fins 30 are combined, and the pipe body 11 of each circular section is combined with each heat dissipation fin 30 .

In the aforementioned process, since the outer surface of the tube body 11A of the flat section has a planar shape, the contact area with the automotive chip can be increased to achieve the effect of enhancing heat conduction, and the inside of the tube body 11A of the flat section has a supporting part 12A structure, the tube body 11 of the circular section has a support part 12 structure inside, so the overall rigidity of the heat pipe can be increased without additional support structures, and it can resist the pressure of saturated vapor pressure, and can be installed in accordance with the requirements of vehicle regulations In the high temperature area of the engine room.

Please refer to Fig. 8 and shown in Fig. 9, it is the third embodiment of this creation, wherein the pipe body 11B is an oblate pipe, and the two radially opposite ends of the support part 12B are respectively connected to the ring inner wall 111B of the pipe body 11B, and The connection method can be connected by diffusion welding, but it is not limited thereto; and the main difference between the third embodiment and the second embodiment lies in the capillary structure in the tube body 11B, specifically, there are two sintered tubes in the tube body 11B. Each sintered portion 13B is a capillary structure formed by copper powder after sintering, and each sintered portion 13B is arranged on two sides relative to the support portion 12B, and extends along the two ends of the tube body 11B, in other words, the support portion 12B and each sintered portion 13B are elongated columnar bodies arranged at intervals. In this embodiment, the support portion 12B is penetrated with a plurality of drainage holes 121B, and each drainage hole 121B is arranged at intervals along the axial direction of the support portion 12B. The drainage holes 121B allows the working fluids on both sides of the supporting part 12B to communicate with each other when the present invention operates, so as to improve the operation efficiency of the heat pipe and reduce the overall weight.

The manufacturing method of the heat pipe which can resist the saturated vapor pressure according to the third embodiment of the present invention is made by the following steps: a. Please refer to FIG. The section is a cross-shaped columnar body, and the central rod 40B divides the inner space of the tube body 11B into four spaces; b. fills the spaces formed between the center rod 40B and the tube body 11B with copper powder; c . Sintering copper powder; d: Please refer to Fig. 7, before the copper powder is sintered and solidified, remove the central rod 40B, and at this time four sintered unit units are formed in the tube; e: place in the space formed by removing the central rod 40B Insert the supporting part 12B; f: Please refer to Fig. 8, before each sintering part unit is solidified, the pipe body 11B is pressed with counterweight, so that the upper and lower relative sintering part units are connected to form a complete sintering part 13B, and weld the position of the pipe body 11B relative to the support portion 12B, preferably diffusion welding, but not limited thereto.

The above description is only a preferred embodiment of this creation, and does not impose any formal restrictions on this creation. Although this creation has been disclosed as above with a preferred embodiment, it is not used to limit this creation. Anyone in the technical field has Ordinary knowledgeable persons, without departing from the scope of this creative technical solution, may use the technical content disclosed above to make some changes or modifications as equivalent embodiments of equivalent changes, but any content that does not deviate from this creative technical solution, according to this Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence of the creation still belong to the scope of the technical solution of the creation.

10: heat pipe

11: tube body

111: ring inner wall

12: Support part

Claims (5)

A heat pipe capable of resisting saturated vapor pressure, which includes: a pipe body, which is a hollow closed pipe structure and has a ring inner wall inside, the cross section of the pipe body is elliptical, and two sintered parts are arranged in the pipe body , each of the sintered parts extends along the axial direction of the pipe body; a support part protrudes from the ring inner wall of the pipe body and extends along the axial direction of the pipe body, and the two radially opposite sides of the support part The ends are respectively connected to the inner wall of the ring of the pipe body, and each of the sintered parts is respectively located on two opposite sides of the supporting part. The heat pipe capable of resisting saturated vapor pressure according to claim 1, wherein each of the sintered parts is a capillary structure formed by sintering copper powder. The heat pipe capable of resisting saturated vapor pressure according to claim 1 or 2, wherein the supporting part is a rectangular strip. The heat pipe capable of resisting saturated vapor pressure as claimed in claim 3, wherein a plurality of drainage holes penetrate the support part, and each drainage hole is arranged at intervals on the support part. A method for manufacturing a heat pipe capable of resisting saturated vapor pressure, which is applied to the heat pipe capable of resisting saturated vapor pressure in any one of Claims 1 to 4, which includes: a. A center rod is placed in the pipe body, and the center rod is The cross-section is a cross-shaped column, and the central rod divides the internal space of the tube into four spaces; b. Fill the spaces formed between the central rod and the tube with copper powder; c .The copper powder is sintered; d: before the copper powder is sintered and solidified, the center rod is removed, at this time, a four-sintered unit is formed in the tube body; e: formed after removing the center rod Put the supporting part in the space; f: Before each sintered unit is solidified, pressurize the pipe body with counterweight, so that the upper and lower opposite sintered units are connected to form a complete sintered part, and for the pipe body relative to The position of the support portion is welded.

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