Combined heat pipe, machining method thereof and heat dissipation module

Abstract

The invention provides a combined heat pipe, a processing method thereof and a heat dissipation module, and the combined heat pipe comprises a base heat pipe and an external heat pipe. The base heat pipe is of an integrally-formed structure, an evaporation section and a condensation section are arranged on the base heat pipe and communicate with each other, and in other words, at least one end of the evaporation section communicates with the condensation section. A mounting hole is formed in the base heat pipe, the external heat pipe is provided with an open end and a closed end, and the open end of the external heat pipe is welded with the mounting hole, so that the interior of the external heat pipe is communicated with the interior of the base heat pipe. The machining method is used for machining and manufacturing the combined heat pipe. The heat dissipation module comprises the combined heat pipe. According to the combined heat pipe, the machining method thereof and the heat dissipation module, the heat exchange area of the heat pipe can be increased through simple structural design on the basis that the overall size of the heat pipe is not changed, and therefore the overall heat dissipation performance of the heat pipe is improved.

Description

Technical Field

[0001] The present invention relates to the field of heat dissipation technology, and in particular to a combined heat pipe and a processing method thereof, and a heat dissipation module. Background Art

[0002] The heat dissipation module mainly includes heat pipes and heat dissipation fins. The existing heat pipe is mainly composed of a closed metal tube body, a capillary wick structure therein, and a heat transfer fluid filled in the metal tube body, and an appropriate vacuum is maintained in the metal tube body to reduce the starting temperature difference of the heat pipe. The evaporation end of the heat pipe is set at the heat source, so that the heat generated by the heat source evaporates the fluid (liquid phase) in the tube and absorbs heat to vaporize (vapor phase). The generated steam is driven by the steam pressure difference to flow to the condensation part of the heat pipe. The steam releases latent heat in the condensation part, that is, condenses back to the liquid phase, and then drives through the capillary force to return to the evaporation part of the heat pipe through the capillary wick structure, that is, the heat is quickly conducted out through the above structure. Due to the simple structure of the heat pipe and the advantages of high conductivity and low thermal resistance, it has long been used in electronics or other different heat dissipation fields.

[0003] In common tower radiators, a U-shaped heat pipe 20 is generally used, and its structure is as follows: Figure 1 As shown. This type of U-shaped heat pipe 20 needs to be bent into shape. However, due to the capillary wick structure inside the heat pipe, the bending radius at the corner is relatively limited when bending, resulting in the width of the entire heat pipe being limited. Therefore, there will be a blank area 21 in the middle of the U-shaped heat pipe. Due to the lack of a heat pipe as a medium, the heat transfer efficiency of the blank area 21 is low, thereby limiting the heat dissipation performance of the U-shaped heat pipe 20 and the radiator.

[0004] Therefore, how to design a combined heat pipe and its processing method, and a heat dissipation module so that the heat exchange area can be increased through a simple structural design without changing the overall size of the heat pipe, thereby improving the heat dissipation performance. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a combined heat pipe and a processing method thereof, and a heat dissipation module, so that the heat exchange area can be increased through a simple structural design without changing the overall size of the heat pipe, thereby improving the heat dissipation performance.

[0006] The objective of the present invention is achieved through the following technical solutions: A combined heat pipe comprises a base heat pipe and an external heat pipe; The base heat pipe is an integrally formed structure, and an evaporation section and a condensation section are provided on the base heat pipe, and the evaporation section and the condensation section are connected to each other, that is, at least one end of the evaporation section is connected to the condensation section; The base heat pipe is provided with a mounting hole, the external heat pipe is provided with an open end and a closed end, the open end of the external heat pipe is welded to the mounting hole, so that the interior of the external heat pipe is connected to the interior of the base heat pipe.

[0007] In one of the embodiments, the base heat pipe and the external heat pipe are both provided with a capillary wick structure and a working fluid, and the working fluid circulates inside the two to achieve heat transfer; when the external heat pipe and the base heat pipe are welded, the capillary wick structures of the two are interconnected, and the working fluid can flow between the base heat pipe and the external heat pipe.

[0008] In one of the embodiments, the outer shells of the base heat pipe and the external heat pipe are made of copper, aluminum, copper alloy or aluminum alloy.

[0009] In one embodiment, the external heat pipe is a cylindrical structure, the base heat pipe is a U-shaped structure, the connection between the evaporation section and the condensation section forms a corner, the evaporation section is a flat structure, and the condensation section is a cylindrical structure.

[0010] In one of the embodiments, at least one notch is formed at the open end of the external heat pipe, and the notches are arranged relative to each other to form a channel. When the external heat pipe is welded to the base heat pipe, the open end is plugged into the interior of the base heat pipe from the mounting hole, and the channel is used to ensure that the interior of the base heat pipe remains connected.

[0011] A processing method is used to process and manufacture the above-mentioned combined heat pipe, which comprises the following steps: Prepare the main body prototype of the base heat pipe and the external heat pipe; At least one mounting hole is provided on the main body of the base heat pipe; One end of the external heat pipe is inserted into the mounting hole of the base heat pipe, and the two are combined and fixed by welding.

[0012] In one embodiment, at least one of the two ends of the main body prototype is an open end or both ends are open ends.

[0013] In one of the embodiments, at least one end of the base heat pipe or the external heat pipe is a closed end, and the other end is provided with an injection pipe, through which compressed gas is injected into the interior of the main body prototype to form a high pressure inside the main body prototype; the mounting hole is obtained by laser cutting.

[0014] In one of the embodiments, an air pressure monitoring instrument is included. When compressed gas is injected, the air pressure monitoring instrument monitors the air pressure in the main body prototype in real time; when a sudden drop in the air pressure in the main body prototype is detected, the laser cutting stops.

[0015] In one of the embodiments, after the laser welding is completed, compressed gas is injected into the main body prototype again, and the air pressure monitoring instrument performs real-time monitoring to verify the air tightness of the welding.

[0016] In one of the embodiments, the steps include a CCD vision module and a robotic arm, wherein the CCD vision module determines the direction of the external heat pipe by identifying the position of the notch, and the robotic arm is used to clamp the external heat pipe and adjust the direction of the external heat pipe.

[0017] In one of the embodiments, the step includes a fixing fixture, which includes: a base, a floating platform, a pressing clamp, a clamping cylinder and a driving motor. The floating platform is rotatably arranged on the base, and the main body prototype is fixed on the floating platform by the pressing clamp. The driving motor is used to drive the floating platform to rotate yaw. The clamping cylinder is fixed on the floating platform, and the clamping cylinder is used to clamp the external heat pipe.

[0018] In one of the embodiments, when one end of the external heat pipe is inserted into the mounting hole of the base heat pipe and the two are combined and fixed by welding, the welding can be laser welding, CO2 welding or brazing.

[0019] In one embodiment, there is further a step of filling the working fluid and sealing the port corresponding to the main body prototype.

[0020] The invention also discloses a heat dissipation module, which comprises the combined heat pipe.

[0021] In one embodiment, there is a step of cutting off the injection tube.

[0022] In summary, the combined heat pipe and its processing method, as well as the heat dissipation module of the present invention can increase the heat exchange area of ​​the heat pipe through a simple structural design without changing the overall size of the heat pipe, thereby improving the overall heat dissipation performance of the heat pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below.

[0024] Figure 1 It is a structural schematic diagram of a U-shaped heat pipe involved in the background technology; Figure 2It is a schematic diagram of the structure of the combined heat pipe of the present invention; Figure 3 for Figure 2 A schematic diagram of the structural decomposition of the combined heat pipe shown; Figure 4 It is a schematic diagram of the state where the opening end is combined with the edge of the mounting hole; Figure 5 It is a schematic diagram of the state where the open end is inserted into the evaporation section from the mounting hole; Figure 6 It is a schematic diagram of the structure of the main prototype during the processing; Figure 7 It is a schematic diagram of the structure of the fixing fixture involved in this processing method. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings below. People familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can implement, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope that the technical content disclosed by the present invention can cover. At the same time, the terms such as "upper", "lower", "left", "right" and "middle" quoted in this specification are also only for the convenience of narration, rather than for limiting the scope of the present invention, and the change or adjustment of their relative relationship. Without substantially changing the technical content, it should also be regarded as the scope that the present invention can implement.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] The present invention provides a combined heat pipe 10, such as Figure 2 and Figure 3 As shown, it includes a base heat pipe 110 and an external heat pipe 120 .

[0028] The base heat pipe 110 is an integrally formed structure, and the base heat pipe 110 is provided with an evaporation section 111 and a condensation section 112. The evaporation section 111 and the condensation section 112 are interconnected, that is, at least one end of the evaporation section 111 is connected to the condensation section 112.

[0029] like Figure 3 As shown, a mounting hole 114 is provided on the base heat pipe 110, and an external heat pipe 120 is provided with an open end 121 and a closed end 122. The open end 121 of the external heat pipe 120 is welded to the mounting hole 114, so that the interior of the external heat pipe 120 is interconnected with the interior of the base heat pipe 110, thereby forming a whole.

[0030] In this embodiment, if Figure 2 and Figure 3 As shown, the base heat pipe 11 is in a U-shaped structure (the present embodiment is implemented in a U-shaped shape for illustration, but is not limited thereto), the number of condensing sections 112 is two, and the two condensing sections 112 are respectively located on both sides of the evaporating section 111, and the connection between the evaporating section 111 and the condensing section 112 forms a corner 113. Moreover, in the present embodiment, the condensing section 112 is a cylindrical structure, and the structure of the external heat pipe 120 is similar to that of the condensing section 112, both of which are cylindrical structures. The evaporating section 111 is a flat structure, and the evaporating section 111 with a flat structure can have a larger contact area when in contact with a heat source such as a chip, thereby obtaining better heat exchange performance. Of course, the evaporating section 111 and the condensing section 112 can also be set to be flat or cylindrical at the same time, which is not limited thereto.

[0031] The base heat pipe 110 and the external heat pipe 120 of the present invention are both provided with a capillary wick structure and a working fluid (similar to the heat pipe of the prior art), and the working fluid circulates in the two through a two-phase flow to achieve heat transfer. When the external heat pipe 120 and the base heat pipe 110 are welded, the capillary wick structures of the two are connected to each other, so that the working fluid can flow between the base heat pipe 110 and the external heat pipe 120, that is, the evaporation section 111 of the base heat pipe 110 is also the evaporation area of ​​the external heat pipe 120, and the external heat pipe 120 itself plays the same condensation and heat dissipation role as the condensation section 112.

[0032] In the prior art, due to the capillary wick structure inside the heat pipe, the bending radius at the corner is relatively limited when bending, resulting in the width of the entire heat pipe (U-shaped heat pipe 20) being limited. Therefore, there is a blank area 21 (such as Figure 1 As shown). Due to the lack of heat pipes as a medium, the heat transfer efficiency in this area is low, which limits the heat dissipation performance of the U-shaped heat pipe 20 and the radiator. In other words, on the plane where the U-shaped heat pipe 20 is located, although the U-shaped heat pipe 20 occupies a larger area as a whole, the actual effective heat dissipation area is limited. Existing tower radiators usually increase the number of U-shaped heat pipes 20 and add fins to improve the heat dissipation performance, which also increases the size and cost of the radiator.

[0033] Compared with the prior art, the present invention welds the external heat pipe 120 to the base heat pipe 110 by laser welding, which is equivalent to adding a number of condensation branches to the existing U-shaped heat pipe 20. In this way, the blank area 21 of the prior art is filled, and the effective heat dissipation area of ​​the heat pipe is increased, thereby improving the overall heat dissipation performance of the heat pipe.

[0034] Preferably, the shells of the base heat pipe 110 and the external heat pipe 120 are both made of copper, which has high heat transfer efficiency, large heat capacity and good corrosion resistance. Copper heat pipes also include copper-plated heat pipes and single crystal copper heat pipes. Of course, the shells of the base heat pipe 110 and the external heat pipe 120 can also be made of one or more of aluminum, copper alloy or aluminum alloy.

[0035] In this embodiment, the open end 121 of the external heat pipe 120 is provided with at least one notch 123 (eg Figure 3 As shown, the notches 123 are arranged opposite to each other and form a channel. When the external heat pipe 120 is welded to the base heat pipe 110, the open end 121 is inserted into the inside of the base heat pipe 110 from the mounting hole 114, and the channel is used to ensure that the inside of the base heat pipe 110 remains connected.

[0036] It should be noted that whether or not the notch 123 is provided will affect the connection between the external heat pipe 120 and the evaporation section 111. Specifically, if the notch 123 is not provided, when the external heat pipe 120 is plugged in, the open end 121 will penetrate into the interior of the evaporation section 111, which will block the air passage inside the evaporation section 111. Therefore, in the absence of the notch 123, the open end 121 can only be combined with the edge of the mounting hole 114 (such as Figure 4 After the notch 123 is opened, the external heat pipe 120 can be directly plugged into the evaporation section 111 (as shown in FIG. Figure 5 As shown in FIG. 1 ), the air passage inside the external heat pipe 120 can still be unobstructed through the channel formed by the notch 123, so no blockage occurs.

[0037] In contrast, the method of directly plugging the external heat pipe 120 into the interior of the evaporation section 111 can be more conducive to achieving internal heat exchange. Because after plugging in, the capillary wick structure of the external heat pipe 120 will also penetrate into the interior of the evaporation section 111, and contact with the capillary wick structure of the evaporation section 111 over a large area, so that the internal working fluid can circulate smoothly. If the external heat pipe 120 is not plugged into the interior of the evaporation section 111, the contact area of ​​the capillary wick structure inside the two is very small, which will limit the flow of the working fluid therein. In other words, the direct plug-in method can improve the heat exchange efficiency of the heat pipe after welding.

[0038] At the same time, the direct plug-in method is also conducive to welding, because after plugging, the mounting hole 114 has a limiting effect on the external heat pipe 120, so the external heat pipe 120 will not be misaligned with the mounting hole 114 during welding. If it cannot be plugged in, the open end 121 of the external heat pipe 120 can only be supported on the edge of the mounting hole 114, which makes it easy for the open end 121 to be misaligned with the mounting hole 114 during welding.

[0039] The present invention also provides a processing method for processing the combined heat pipe 10, which mainly includes the following steps: First, prepare the main body prototype 110 ′ (such as Figure 6 As shown) and an external heat pipe 120; Then, at least one mounting hole 114 is opened on the main body prototype 110 ′ of the base heat pipe 110 ; Finally, one end of the external heat pipe 120 is inserted into the mounting hole 114 of the base heat pipe 110 , and the two are combined and fixed by welding.

[0040] Among them, at least one of the two ends of the main body prototype 110' is an open end or both ends are open ends. Preferably, at least one end of the base heat pipe 110 or the external heat pipe 120 is a closed end, and the other end is provided with an injection pipe 115, through which compressed gas can be injected into the main body prototype 110' to form a high pressure inside the main body prototype 110'; the mounting hole 114 is obtained by laser cutting.

[0041] During the laser cutting process, the method has an air pressure monitoring instrument (not shown). After the compressed gas is injected into the main body prototype 110', the air pressure monitoring instrument monitors the air pressure in the main body prototype 110' in real time. When the air pressure in the main body prototype 110' drops suddenly, it means that the mounting hole 114 is cut and formed, and the laser cutting stops to avoid the laser cutting the capillary wick structure inside the evaporation section 111. The specific cutting process and principle are as follows: Before cutting, compressed air is injected into the main body prototype 110' through the injection pipe 115, so that during the cutting process, the inside of the main body prototype 110' is always maintained in a high pressure state, and the high pressure gas inside has an outward thrust on the shell. During cutting, the laser cuts on the surface of the evaporation section 111 along a circular trajectory, and the laser does not directly penetrate the shell of the evaporation section 111, but continuously reduces the thickness of the shell (i.e., cuts out a groove). When the thickness is reduced to a level that is not enough to resist the gas pressure, it will break, thereby forming the mounting hole 114. At this time, the high pressure gas inside the main body prototype 110' will quickly discharge the mounting hole 114, causing the air pressure inside the main body prototype 110' to drop suddenly. After the air pressure monitoring instrument detects the sudden drop in air pressure, it immediately prompts the laser to stop, so as to prevent the laser from irradiating the inside of the evaporation section 111 and causing damage to the capillary wick structure; at the same time, when the high pressure gas is discharged, the residual material and debris generated by the cutting will be blown away, thereby preventing the residual material and debris from falling into the inside of the evaporation section 111.

[0042] Preferably, the air pressure monitoring instrument can also be applied to other steps to check the sealing degree of laser welding. After the laser welding is completed, the compressed air is injected into the interior of the main body prototype 110' again and maintained for a period of time, during which the air pressure monitoring instrument performs real-time monitoring. If the air pressure in the main body prototype 110' does not decrease during this period, it means that the welding air tightness between the opening end 121 and the mounting hole 114 is good.

[0043] In this embodiment, a CCD vision module and a robotic arm (not shown) are also used. The CCD vision module determines the direction of the external heat pipe 120 by identifying the position of the notch 123, and the robotic arm is used to clamp the external heat pipe 120 and adjust the direction of the external heat pipe 120. Through the cooperation of the CCD vision module and the robotic arm, the open end 121 of the external heat pipe 120 can be accurately inserted into the mounting hole 114, and the open end 121 will not block the airway inside the evaporation section 111 after probing into the interior of the evaporation section 111. Preferably, the robotic arm can adopt a seven-axis torque collaborative robot of the prior art, which adopts a six-dimensional pressure sensor to control the force accuracy, thereby realizing the angle adjustment of the external heat pipe 120 and controlling the insertion force.

[0044] In this embodiment, the method includes fixing the fixture 30. Figure 7 As shown, the fixing fixture 30 includes: a base 31, a floating platform 32, a pressing clamp 33, a clamping cylinder 34 and a driving motor 35. The floating platform 32 is rotatably arranged on the base 31, the main body prototype 110' is fixed on the floating platform 32 by the pressing clamp 33, the driving motor 35 is used to drive the floating platform 32 to swing and rotate, the clamping cylinder 34 is fixed on the floating platform 32, and the clamping cylinder 32 is used to clamp the external heat pipe 120.

[0045] During operation, the staff installs the main body prototype 110' onto the floating platform 32 and clamps it with the pressing clamp 33; the laser is located above the fixing fixture 30 and emits laser light, and the driving motor 35 drives the floating platform 32 to swing and rotate within an angle range of 45° to the left and right, so that the laser can irradiate the edge of the mounting hole 114, thereby completing the laser cutting or laser welding work. The clamping cylinder 34 moves with the floating platform 32. In this method, the clamping cylinder 34 temporarily clamps the external heat pipe 120 that has not been welded and fixed, thereby ensuring that the external heat pipe 120 moves synchronously with the main body prototype 110', and preventing the external heat pipe 120 from tilting or falling during the deflection of the floating platform 32.

[0046] After the external heat pipe 120 is combined and fixed with the base heat pipe 110, the working fluid is filled into the main body prototype 110' through the injection pipe 115. Then the injection pipe 115 is cut off and the corresponding port of the main body prototype 110' is sealed. In this way, the main body prototype 110' is processed into the base heat pipe 110, and the base heat pipe 110 and the external heat pipe 120 are welded to form the combined heat pipe 10 of the present invention.

[0047] During the welding process, the welding of the method can be laser welding, CO2 welding or brazing.

[0048] Compared with the existing laser cutting technology, the laser cutting method of the present invention has the following benefits: First, it has a clear feedback signal, that is, the internal air pressure value of the main body prototype 110', so that the machine equipment can clearly determine whether the cutting is in place and stop the laser in time, thereby avoiding damage to the capillary wick structure inside the evaporation section 111; Secondly, the cuts after laser cutting are smooth and consistent, which lays the foundation for the subsequent splicing process of the external heat pipe 120; Thirdly, the residual material and debris generated by laser cutting will be blown away by the discharged high-pressure gas, thereby preventing the residual material and debris from falling into the evaporation section 111 and avoiding contamination of the inner cavity.

[0049] The present invention further provides a heat dissipation module, which includes a combined heat pipe 10. The heat dissipation module also includes heat dissipation fins, which are sleeved on the combined heat pipe 10.

[0050] In summary, the combined heat pipe and its processing method, as well as the heat dissipation module of the present invention can increase the heat exchange area of ​​the heat pipe through a simple structural design without changing the overall size of the heat pipe, thereby improving the overall heat dissipation performance of the heat pipe.

[0051] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A combined heat pipe, characterized in that: Including base heat pipe and external heat pipe; The base heat pipe is an integrally formed structure, and an evaporation section and a condensation section are provided on the base heat pipe, and the evaporation section and the condensation section are connected to each other, that is, at least one end of the evaporation section is connected to the condensation section; The base heat pipe is provided with a mounting hole, the external heat pipe is provided with an open end and a closed end, the open end of the external heat pipe is welded to the mounting hole, so that the interior of the external heat pipe is connected to the interior of the base heat pipe.

2. The combined heat pipe according to claim 1, characterized in that: The base heat pipe and the external heat pipe are both provided with a capillary wick structure and a working fluid, and the working fluid circulates inside the two to achieve heat transfer; when the external heat pipe and the base heat pipe are welded, the capillary wick structures of the two are connected to each other, and the working fluid can flow between the base heat pipe and the external heat pipe.

3. The combined heat pipe according to claim 2, characterized in that: The shells of the base heat pipe and the external heat pipe are made of copper, aluminum, copper alloy or aluminum alloy.

4. The combined heat pipe according to claim 2, characterized in that: The external heat pipe is a cylindrical structure, the base heat pipe is a U-shaped structure, the connection between the evaporation section and the condensation section forms a corner, the evaporation section is a flat structure, and the condensation section is a cylindrical structure.

5. The combined heat pipe according to claim 2, characterized in that: The open end of the external heat pipe is provided with at least one notch, and the notches are arranged opposite to each other to form a channel. When the external heat pipe is welded to the base heat pipe, the open end is inserted into the interior of the base heat pipe through the mounting hole, and the channel is used to ensure that the interior of the base heat pipe remains connected.

6. A processing method, characterized in that: The method for manufacturing the combined heat pipe according to any one of claims 2 to 5 comprises the following steps: Prepare the main body prototype of the base heat pipe and the external heat pipe; At least one mounting hole is provided on the main body of the base heat pipe; One end of the external heat pipe is inserted into the mounting hole of the base heat pipe, and the two are combined and fixed by welding.

7. The processing method according to claim 6, characterized in that: At least one of the two ends of the main body prototype is an open end or both ends are open ends.

8. The processing method according to claim 6, characterized in that: At least one end of the base heat pipe or the external heat pipe is a closed end, and the other end is provided with an injection pipe, through which compressed gas is injected into the interior of the main body prototype to form a high pressure inside the main body prototype; the mounting hole is obtained by laser cutting.

9. The processing method according to claim 8, characterized in that: It comprises an air pressure monitoring instrument. When compressed gas is injected, the air pressure monitoring instrument monitors the air pressure in the main body prototype in real time. When a sudden drop in the air pressure in the main body prototype is detected, the laser cutting stops.

10. The processing method according to claim 9, characterized in that: After the laser welding is completed, compressed gas is injected into the main body prototype again, and the air pressure monitoring instrument performs real-time monitoring to verify the air tightness of the welding.

11. The processing method according to claim 6, characterized in that: The steps include a CCD vision module and a robotic arm, wherein the CCD vision module determines the direction of the external heat pipe by identifying the position of the notch, and the robotic arm is used to clamp the external heat pipe and adjust the direction of the external heat pipe.

12. The processing method according to claim 6, characterized in that: The steps include a fixing fixture, which includes: a base, a floating platform, a pressing clamp, a clamping cylinder and a driving motor. The floating platform is rotatably arranged on the base, and the main body prototype is fixed on the floating platform by the pressing clamp. The driving motor is used to drive the floating platform to rotate. The clamping cylinder is fixed on the floating platform, and the clamping cylinder is used to clamp the external heat pipe.

13. The processing method according to claim 6, characterized in that: In the step of inserting one end of the external heat pipe into the mounting hole of the base heat pipe and combining and fixing the two by welding, the welding can be laser welding, CO2 welding or brazing.

14. The processing method according to claim 6, characterized in that: There is further a step of filling the working fluid and sealing the ports corresponding to the main body prototype.

15. The processing method according to claim 14, characterized in that: There is also a step of cutting off the injection tube.

16. A heat dissipation module, characterized in that: The invention comprises the combined heat pipe as described in any one of claims 1 to 5.

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