TWI650192B - Apparatus and method of degasing and sealing for heat pipe - Google Patents

Abstract

A device and a method for degassing and sealing a heat pipe, relating to a manufacturing process of the heat pipe, after completing the heat pipe shell production, after filling the working fluid, the device and method for removing the non-condensing gas inside the heat pipe and shrinking the casing are required, Suitable for heat pipes with large diameter and long length, the device comprises a heat pipe casing to be processed, an adjustable pressure relief valve, a horizontal resistance spot welder and a heater; wherein the horizontal resistance spot welding machine The polarities of the movable electrode and the fixed electrode are opposite. When the pneumatic cylinder of the horizontal resistance spot welding machine is activated, the horizontal pressure of the movable electrode is applied, so that the opening of the shrinking end of the heat pipe tube to be processed is pressed by the movable electrode and the fixed electrode. In the whole circuit, the contact point of the opening at the neck end of the tube has the largest resistance; therefore, when a certain large current is passed, the contact point generates a large amount of resistance heat, and the metal neck of the contact point is quickly heated. To slightly above its melting temperature, the opening of the neck end of the shell is welded and sealed to complete the sealing.

Description

Heat pipe degassing and sealing device and method

The invention relates to a heat pipe manufacturing program, which is characterized in that after the heat pipe shell is completed and the working fluid is filled, the non-condensing gas inside the heat pipe and the closed casing shrinkage need to be removed, especially for the larger diameter and the length. Degassing and sealing technology developed by Changzhi Heat Pipe.

Heat pipes are the most common and efficient thermal (non-heating) components in today's electronic product heat sinks. Taiwan was once the largest exporter of international heat pipe electronic cooling modules, and it has the foundation of small heat pipe production technology.

The manufacturing material of the heat pipe is mainly made of metal pipe. The main process is to first make the pipe end of the pipe, make the core structure and shrink the pipe into a shell, and then fill the shell with liquid, vacuum and seal. The prior patent technology, such as the method and device for continuously conveying the heat pipe in addition to the air pressure sealing mouth disclosed in the Republic of China Patent No. I248839, is a method of heating a working fluid in a pipe to a saturation temperature while discharging steam and non-condensing gas, but the technology is It is not possible to seal in time, which is likely to cause steam loss and danger of seeping into the air. The automatic deaeration sealing machine for the heat pipe disclosed in the Republic of China patent M284623 is a type of heating device for heating the internal air of the heat pipe to complete the degassing vacuum operation, and then using the clamping and welding mechanism to seal the mouth, but this technology must be on the machine table. Complete all the work inside, not suitable for large heat pipes. The degassing sealing method and device for continuously parallel conveying of the heat pipe disclosed in the Republic of China Patent No. I285726 is a method of degassing using a heating unit And the sealing mechanism is sealed, but this technology is affected by the continuous parallel conveying mechanism, so that the degassing and sealing effects are affected. The Shrinkage free sealing structure of heat pipe disclosed in US Pat. No. 7,229,104 B2 is a type in which the open end of the tube is flattened and then folded inward, and can be sealed without shrinking, but the technique is There is a danger of infiltration into the air during the process. The method for sealing a heat pipe disclosed in US Pat. No. 7,467,466 B2 is to use a two-stage mold to gradually shrink and clamp the open end of the shell, and then weld the seal, but the technical procedure is complicated. And the heat pipe and method for sealing the heat pipe disclosed in US Pat. No. 7,543,380 B2, which is a method of flattening and flattening the open end of the shell by a mold, and then welding the melt seal.

The description of the above-mentioned conventional heat pipe degassing and sealing technology and its missing are as follows: 1. The degassing system uses a heater with a temperature controller to eliminate non-condensing gas, and since there is no sealing before completely exhausting, there is a large amount of steam loss. 2. There is a time delay between degassing and sealing, so there is residual steam loss and external gas entry risk; 3. Sealing is completed by two steps of pressing and welding, because the metal will rebound after pressing, so there is residual Steam loss and external gas entry risk; and 4. Another heat pipe sealing technology, using the opposite polarity of the electrode, the opening is gradually pressed up and down, and then energized, because the current passes through the metal pressing part, the high temperature is generated by the resistance, and the metal shell is melted. Sealing, although the steps are simple, it is not easy to produce cracks, but there are the following defects: (1) the electrode pressing process is displaced due to sliding with the surface of the round tube; and (2) the tube shell is in a horizontal orientation, and the internal liquid is easy to flow out.

It can be seen from the above conventional examples that there is no effective device and method for solving the problems of steam loss, external gas infiltration, size limitation and electrode sliding dislocation. Therefore, the general practitioners cannot meet the needs of the user in actual use.

The main object of the present invention is to overcome the above problems encountered in the prior art and to provide a non-condensing gas for removing the working fluid inside the heat pipe by using an adjustable pressure relief valve and a heater, and then immediately sealing and maintaining the vacuum state inside the heat pipe. A device and method for degassing and sealing a heat pipe with minimal steam loss and no external gas entering the risk.

A secondary object of the present invention is to provide a device and method for degassing and sealing a heat pipe of a heat pipe having a large diameter and a long length by simultaneously pressing and welding using a horizontal resistance welding technique.

For the purpose of the above, the present invention relates to a heat pipe degassing and sealing device, which comprises: a heat pipe casing to be processed, which is a closed cavity containing a working fluid, and the working flow system in the closed cavity can be temperature-dependent The change is a continuous liquid and vapor two-phase change, and the heat pipe shell to be processed has a heating section, a heat transfer section and a shrinkage section at the end of the shrinkage end; an adjustable pressure relief valve is set in the waiting The shrinkage end of the heat pipe shell is processed, and the pressure in the heat pipe casing to be processed is adjusted to be slightly larger than the atmospheric pressure (Po) by setting the discharge pressure (Ps1) and the closing pressure (Ps2), when the heat pipe casing to be processed is processed When the pressure inside the pressure exceeds the discharge pressure, the pressure is released. After the pressure is released, when the pressure in the heat pipe casing to be processed is lower than the closing pressure (Ps2), the line is closed; a horizontal resistance spot welding machine includes one The pedestal has a movable electrode and a fixed electrode pressed against each other at the top end of the pedestal, and the contact surface of the movable electrode and the fixed electrode is a concave-convex surface, and the fixed electrode is mounted on a fixed electrode holder and tightly Relying on the shrinkage section of the heat pipe casing to be processed And the movable electrode is disposed on a movable electrode holder and faces the fixed electrode of the shrinkable section of the heat pipe tube to be processed, and the movable electrode is connected with a pneumatic cylinder, and the fixed electrode and the movable electrode are connected to one end of the movable electrode. Is electrically connected to a power cord, and when the heat pipe shell to be processed is sealed in the horizontal resistance spot welder, the opening of the shrink end is fixed upward; and a heater is disposed at the Heat pipe to be processed a sealing end of the tube shell for heating the portion of the heat pipe tube end to be inserted into the heater, so that the heat pipe tube to be processed is formed as a heating portion under the heater, and is located at The upper portion of the heater is formed as a heat transfer section.

In the above embodiment of the present invention, the heat pipe shell material to be processed must be metal, and the working fluid inside thereof is in a liquid state at a normal temperature.

In the above embodiment of the present invention, the pressure value set by the adjustable pressure relief valve is in the order of Ps1>Ps2>Po.

In the above embodiment of the invention, the movable electrode and the fixed electrode have opposite polarities.

In the above embodiment of the present invention, the power line is electrically connected to a power source.

In the above embodiment of the invention, the power source is a direct current source, an alternating current source or a pulse current source.

In the above embodiment of the present invention, one of the contact faces of the movable electrode and the fixed electrode is a concave surface, and the other one is a convex surface that coincides with each other.

In the above embodiment of the present invention, the heat pipe tube to be processed is fixed upward on the horizontal resistance spot welder with the opening of the vertical direction and the end of the neck.

In the above embodiment of the present invention, a space is formed in the interior of the base, and a through hole is formed in the top end of the base, and the heater is disposed in the installation space and corresponds to the through hole. The sealing end of the heat pipe tube to be processed penetrates into the heater through the through hole, and is fixed to the horizontal resistance spot welding machine with the opening in the vertical direction and the narrowing end facing upward.

In the above embodiment of the present invention, the heat pipe tube to be processed is fixed upward in an inclined orientation and the opening of the neck end.

For the purpose of the above, the present invention further relates to a method for degassing and sealing a heat pipe, which comprises at least the following steps: (A) preparing a heat pipe casing to be processed, sealing one end of the heat pipe casing to be processed, and the other end Performing a shrinkage so that the heat pipe tube to be processed is self-sealing to the end of the shrinkage Forming a heating section, a heat transfer section and a shrinking section at the end; (B) injecting a working fluid capable of changing between liquid and vapor as a function of temperature to the preset volume from the neck end of the heat pipe tube to be processed; (C) An adjustable pressure relief valve is installed at the shrink end of the heat pipe tube to be processed; (D) a heater is installed at the end of the heat pipe tube to be processed; (E) a shrinkage of the adjustable pressure relief valve is installed The end is placed between the two poles of a horizontal resistance spot welding machine, so that the heat pipe casing to be processed is fixed with the opening of the shrinking end facing upward, wherein the horizontal resistance spot welding machine comprises a base at the top end thereof A movable electrode and a fixed electrode are mutually pressed on both sides, and a contact surface of the movable electrode and the fixed electrode is an uneven surface, and the fixed electrode is mounted on a fixed electrode holder and abuts the heat pipe to be processed a movable portion of the shell is disposed on a movable electrode holder and faces an opposite surface of the fixed electrode of the heat pipe tube to be processed, and the movable electrode is connected to a pneumatic cylinder, and the fixed electrode is coupled to the movable electrode One end of the movable electrode is electrically connected to a power line (F) turning on the heater to heat the heating section of the heat pipe tube end to be inserted into the heating section below the heater, so that the temperature of the working fluid rises until the adjustable pressure relief valve opens the exhaust gas and then closes, Turning off the heater; and (G) turning on the horizontal resistance spot welder to perform a welding operation, completing the pressing and welding of the shrinkage end of the heat pipe tube to be processed, and deactivating the working fluid inside the heat pipe casing to be processed Immediately seal it and keep the internal vacuum.

In the above embodiment of the present invention, the heat pipe shell material to be processed must be metal, and the working fluid inside thereof is in a liquid state at a normal temperature.

In the above embodiment of the present invention, in the step (F), when the working fluid in the heat pipe casing to be processed is mixed with the non-condensing gas, the pressure in the heat pipe casing to be processed rises until the adjustable pressure relief valve is set to discharge. The discharge pressure (Ps1), the adjustable pressure relief valve immediately opens the exhaust gas mixture to discharge the non-condensing gas, and the internal pressure of the heat pipe casing to be processed is lowered until the set closing pressure (Ps2) is still greater than the atmospheric pressure (Po ), close immediately. In the above embodiment of the present invention, the pressure value set by the adjustable pressure relief valve is in the order of Ps1>Ps2>Po.

In the above embodiment of the present invention, the step (G) is to activate the pneumatic cylinder of the horizontal resistance spot welding machine to push the movable electrode to move horizontally, so that the opening of the shrinkage end of the heat pipe tube to be processed is the movable electrode and The fixed electrode is pressed, and a large amount of resistance heat is generated at a contact point of the opening by a large current, and is heated to a temperature slightly larger than a melting temperature of the heat pipe casing to be processed, and the opening of the shrinkage end is welded and sealed to complete the sealing.

In the above embodiment of the invention, the movable electrode and the fixed electrode have opposite polarities.

In the above embodiment of the present invention, one of the contact faces of the movable electrode and the fixed electrode is a concave surface, and the other one is a convex surface that coincides with each other.

In the above embodiment of the present invention, the power line is electrically connected to a power source.

In the above embodiment of the invention, the power source is a direct current source, an alternating current source or a pulse current source.

1‧‧‧ heat pipe shell to be processed

10‧‧‧heating section

11‧‧‧heat transfer section

12‧‧‧neck section

2‧‧‧Adjustable pressure relief valve

3‧‧‧Horizontal resistance spot welder

31‧‧‧ movable electrode

32‧‧‧Fixed electrode

33‧‧‧ movable electrode holder

34‧‧‧Fixed electrode holder

35‧‧‧Base

36‧‧‧Pneumatic cylinder

37‧‧‧Power cord

38‧‧‧Power supply

4‧‧‧heater

S10~s16‧‧‧step

FIG. 1 is a schematic diagram of a device architecture of a specific embodiment of the present invention.

Figure 2 is a schematic view of the heat pipe necking section of the present invention abutting the fixed electrode.

Figure 3 is a schematic flow chart of a method of a specific embodiment of the present invention.

Figure 4 is a block diagram showing the structure of a device according to another embodiment of the present invention.

Please refer to FIG. 1 to FIG. 3 , which are schematic diagrams of a device structure according to an embodiment of the present invention, a schematic diagram of a heat pipe constricted section of the present invention abutting a fixed electrode, and a method of a specific embodiment of the present invention. Schematic diagram of the process. As shown in the figure: the present invention is a heat pipe manufacturing program. After completing the heat pipe shell fabrication, vacuuming, and filling the working fluid, it is necessary to remove the non-condensing gas inside the heat pipe and the device and method for closing the pipe casing to maintain the heat pipe. internal Vacuum state. The apparatus of the present invention, as shown in Fig. 1, comprises a heat pipe casing to be processed 1, an adjustable pressure relief valve 2, a horizontal resistance spot welding machine 3, and a heater 4. The heat pipe shell 1 to be processed mentioned above is a closed cavity filled with working fluid inside, and the working flow system in the closed cavity can continuously change the liquid and vapor two phases with temperature change, so that the surface of the cavity is fast. The characteristics of the uniform temperature achieve the purpose of heat transfer. The heat pipe tube to be processed has a heating section 10, a heat transfer section 11 and a necking section 12 from the tail end to the shrink end, the material of which is metal, and the internal working fluid is liquid at normal temperature.

The adjustable pressure relief valve 2 is disposed at the constricted end of the heat pipe casing 1 to be processed, and can adjust the set discharge pressure (Ps1) and the closing pressure (Ps2) when the working fluid of the heat pipe casing 1 to be processed When the heat is mixed with the non-condensing gas, the pressure in the heat pipe casing 1 to be processed rises until the discharge pressure (Ps1) set by the adjustable pressure relief valve 2, and the adjustable pressure relief valve 2 immediately opens the exhaust gas mixture, which will be non-condensed. The condensed gas is discharged, and at this time, the internal pressure of the heat pipe casing 1 to be processed is lowered until the set closing pressure (Ps2) is still greater than the atmospheric pressure (Po), and is immediately closed. Therefore, the magnitude of the pressure value is Ps1>Ps2>Po.

The horizontal resistance spot welding machine 3 includes a movable electrode 31, a fixed electrode 32, a movable electrode holder 33, a fixed electrode holder 34, a base 35, a pneumatic cylinder 36, a power line 37, and a power source. 38. The movable electrode 31 and the fixed electrode 32 are pressed against each other on both sides of the top end of the base 35. The movable electrode 31 and the fixed electrode 32 have opposite polarities, and the contact faces of the two electrodes 31 and 32 are concave and convex surfaces. The fixed electrode The 32-series is mounted on the fixed electrode holder 34 and abuts against the constricted section 12 of the heat pipe casing 1 to be processed, and the movable electrode 31 is mounted on the movable electrode holder 33 and abuts against the heat pipe casing to be processed. The fixed electrode 32 of the neck portion 12 is opposed to each other as shown in Fig. 2. The movable electrode 31 is connected to the pneumatic cylinder 36, and one end of the fixed electrode holder 34 and the movable electrode holder 33 is electrically connected to the power line 37, and The power source 38 is electrically connected, and the power source 38 can be a direct current source, an alternating current source, or a pulsed current source. The heat pipe shell 1 to be processed is oriented in the vertical direction and the opening of the shrinking end is fixed upward when the horizontal resistance spot welding machine 3 is sealed; and the fixing manner can be held by hand or clamped by the jig. . When the pneumatic cylinder 36 is activated, the movable electrode 31 is pushed horizontally, so that the opening of the shrink end of the heat pipe casing 1 to be processed is pressed by the movable electrode 31 and the fixed electrode 32. In the entire circuit, the contact point due to the opening at the neck end has the greatest resistance. Therefore, when a certain large current is passed, the contact point generates a large amount of resistance heat, and the metal neck end opening of the contact point is quickly heated to a temperature slightly larger than the melting temperature thereof, and the opening of the neck end is welded and sealed to complete the sealing. . The contact surface of the movable electrode 31 and the fixed electrode 32 must be convex and concave. If one of the electrode contact faces is concave, the other electrode contact surface must be a convex surface that can be matched with each other, and the two electrodes 31 and 32 can be prevented from moving horizontally. The process slides misplaced.

The heater 4 is disposed at the sealing end of the heat pipe shell to be processed, and is used for heating the portion of the heat pipe shell 1 to be processed into the lower portion of the heater 4 to heat the heat pipe shell to be processed. 1 is located below the heater 4 as a heating section 10, and above the heater 4 is formed as a heat transfer section 11.

In a specific embodiment, the fixture 35 is further formed with an installation space (not shown) inside the base 35, and a top portion is disposed at the top end of the base 35. The through hole (not shown) is provided in the space, and the heater 4 is disposed in the installation space and corresponds to the through hole, so that the heat pipe casing 1 to be processed is in the horizontal resistance spot welding machine 3 The orientation at the time of sealing is penetrated into the heater 4 through the through hole of the base 35 through the through end, and the vertical resistance and the opening of the narrowing end are fixed upward on the horizontal resistance spot welding machine 3. However, it should be noted that the way in which these fixtures are clamped is only an example. The above-described installation space and through hole can be replaced by a fixing means sandwiched by other jigs known in the art.

When used, the implementation method of the device is as shown in FIG. 3, first step s10, preparing the heat pipe tube to be processed, one end is sealed, one end is narrowed; step s11, liquid is injected from the shrink end of the heat pipe tube to be processed to a preset volume; in step s12, an adjustable pressure relief valve is installed at the shrink end of the heat pipe tube to be processed; in step s13, a heater is installed at the end of the heat pipe tube to be processed; in step s14, an adjustable pressure relief valve is installed The shrink end of the heater is placed between the two poles of the horizontal resistance spot welding machine, so that the heat pipe shell to be processed is fixed with the opening of the shrink end facing upward; in step s15, the heater is turned on to raise the temperature of the liquid until it can be The adjustable pressure relief valve opens the exhaust gas and then closes, closes the heater; and in step s16, the horizontal resistance spot welder is turned on to perform the welding action, and the pressing and welding of the shrinkage end of the heat pipe tube to be processed is completed; After the working fluid inside the heat pipe casing is degassed, it is immediately sealed to maintain the internal vacuum.

Please refer to FIG. 4, which is a schematic diagram of a device architecture according to another embodiment of the present invention. As shown in the figure, the present invention may be in the structural form of the second embodiment in addition to the configuration of the first embodiment described above, and the difference is that when the heat pipe tube to be processed has passed The height exceeds the height of the movable electrode holder 33 or the fixed electrode holder 34 of the horizontal resistance spot welding machine, and cannot be sealed in a vertical direction, and the tilting direction can be inclined and the open end of the narrowing end is fixed upward. The fixing method can be held by hand or clamped by another fixture.

Therefore, the features of the present invention and the problems to be solved are as follows: (1) After the non-condensing gas of the working fluid inside the heat pipe is removed by using the adjustable pressure relief valve, the valve is immediately sealed to maintain the vacuum state inside the heat pipe to minimize steam loss. And there is no risk of external gas entering; (2) using horizontal resistance welding technology to simultaneously compact and weld, suitable for heat pipes with larger diameter and longer length.

In summary, the present invention is a heat pipe degassing and sealing device and method, which can effectively improve various disadvantages of the conventional use, and can eliminate the non-condensing gas of the working fluid inside the heat pipe, and then press and shrink the shrinkage at the same time, immediately Sealing, maintaining internal vacuum, minimizing steam loss, and no risk of external air entering, suitable for heat pipes with larger diameter and longer length, so that the invention can be more advanced, more practical and more suitable for users. It must have met the requirements of the invention patent application and filed a patent application according to law.

However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the invention are modified. All should remain within the scope of the invention patent.

Claims (19)

The utility model relates to a heat pipe degassing and sealing device, which comprises: a heat pipe shell to be processed, which is a closed cavity containing a working fluid, and the working fluid system in the closed cavity can continuously circulate the liquid and the steam according to the temperature change. The phase change comprises a heating section, a heat transfer section and a shrinkage section at the self-sealing end of the heat pipe shell to be processed; an adjustable pressure relief valve is disposed at the shrink end of the heat pipe shell to be processed, By setting the bleed pressure (Ps1) and the closing pressure (Ps2), the pressure in the heat pipe casing to be processed is adjusted to be slightly larger than the atmospheric pressure (Po), when the pressure in the heat pipe casing to be processed exceeds the venting pressure Immediately after pressure relief, after the pressure is released, when the pressure in the heat pipe casing to be processed is lower than the closing pressure (Ps2), the line is closed; a horizontal resistance spot welding machine includes a base disposed on both sides of the top end thereof. The movable electrode and the fixed electrode are mutually pressed, and the contact surface of the movable electrode and the fixed electrode is an uneven surface, and the fixed electrode is mounted on a fixed electrode holder and abuts against the heat pipe tube to be processed. Mouth segment, and the move The pole system is disposed on a movable electrode holder and faces the fixed electrode adjacent to the narrowing section of the heat pipe tube to be processed, and the movable electrode is connected to a pneumatic cylinder, and the fixed electrode and the movable electrode are connected to a power source The wire is electrically connected. When the heat pipe casing to be processed is sealed in the horizontal resistance spot welding machine, the opening of the shrinking end is fixed upward; and a heater is disposed on the heat pipe to be processed. a sealing end of the shell for heating the portion of the heat pipe shell end to be inserted into the heater below, so that the heat pipe shell to be processed is formed as a heating section below the heater, and is located at the The upper portion of the heater is formed as a heat transfer section. The heat pipe degassing and sealing device according to the first aspect of the patent application, wherein the heat pipe shell material to be processed must be metal, and the working fluid inside is liquid at normal temperature. The heat pipe degassing and sealing device according to the first aspect of the patent application scope, wherein the pressure value set by the adjustable pressure relief valve is in the order of Ps1>Ps2>Po. The device for degassing and sealing a heat pipe according to claim 1, wherein the movable electrode and the fixed electrode have opposite polarities. The device for degassing and sealing a heat pipe according to claim 1, wherein the power cord is electrically connected to a power source. The device for degassing and sealing a heat pipe according to claim 5, wherein the power source is a direct current source, an alternating current source or a pulse current source. The apparatus for degassing and sealing a heat pipe according to the first aspect of the invention, wherein one of the contact faces of the movable electrode and the fixed electrode is a concave surface, and the other one is a convex surface which is matched with each other. The apparatus for degassing and sealing a heat pipe according to the first aspect of the invention, wherein the heat pipe casing to be processed is fixed upward on the horizontal resistance spot welder with the opening of the vertical direction and the end of the shrinking end. The device for degassing and sealing a heat pipe according to the first aspect of the invention, wherein a space is formed in the base, and a through hole is formed at a top end of the base, and the heater is disposed on the Corresponding to the through hole, the end of the heat pipe tube to be processed is inserted into the heater through the through hole, and the vertical resistance and the opening of the narrow end are fixed upward at the horizontal resistance point. On the welder. The heat pipe degassing and sealing device according to the first aspect of the invention, wherein the heat pipe casing to be processed is fixed upward in an inclined orientation and an opening of the constricted end. A heat pipe degassing and sealing method comprises at least the following steps: (A) preparing a heat pipe shell to be processed, sealing one end of the heat pipe shell to be processed, and shrinking the other end to make the heat pipe to be processed Forming a heating section, a heat transfer section and a shrinking section from the tail end of the shell to the shrink end; (B) injecting a working fluid which can change between liquid and vapor as a function of temperature from the shrink end of the heat pipe shell to be processed (C) installing an adjustable pressure relief valve at the neck end of the heat pipe tube to be processed; (D) installing a heater at the end of the heat pipe tube to be processed; (E) installing the heater The shrink end of the adjustable pressure relief valve is placed between the two poles of a horizontal resistance spot welder, so that the heat pipe shell to be processed is fixed with the opening of the shrink end facing upward, wherein the horizontal resistance spot welding machine comprises a pedestal having a movable electrode and a fixed electrode pressed against each other at a front end thereof, the contact surface of the movable electrode and the fixed electrode being a concave-convex surface, the fixed electrode being erected on a fixed electrode holder and Close to the heat pipe casing to be processed a movable electrode is disposed on a movable electrode holder and faces an opposite surface of the fixed electrode of the heat pipe tube to be processed, and the movable electrode is connected to a pneumatic cylinder, and the fixed electrode and the movable electrode are movable One end of the electrode is electrically connected to a power line; (F) turning on the heater to heat the heating section below the heater end of the heat pipe tube to be processed, so that the temperature of the working fluid rises until the temperature of the working fluid rises The adjustable pressure relief valve opens the exhaust gas and then closes, closes the heater; and (G) opens the horizontal resistance spot welder for welding action, and completes the pressing and welding of the shrinkage end of the heat pipe tube to be processed.除 After the working fluid inside the heat pipe tube to be processed is degassed, it is immediately sealed to maintain the internal vacuum. The heat pipe degassing and sealing method according to claim 11 , wherein the heat pipe shell material to be processed must be metal, and the working fluid inside is liquid at normal temperature. The method for degassing and sealing a heat pipe according to claim 11 , wherein the step (F) is when the working fluid in the heat pipe casing to be processed is mixed with the non-condensing gas, and the pressure in the heat pipe casing to be processed is It will rise until the relief pressure (Ps1) set by the adjustable pressure relief valve, and the adjustable pressure relief valve immediately opens the discharge mixed gas to discharge the non-condensed gas, and the internal pressure of the heat pipe casing to be processed is lowered until the setting is made. Close the pressure (Ps2) but still greater than atmospheric pressure (Po) and close immediately. The method for degassing and sealing a heat pipe according to claim 13 of the patent application scope, wherein the pressure value set by the adjustable pressure relief valve is in the order of Ps1>Ps2>Po. The method for degassing and sealing a heat pipe according to claim 11 , wherein the step (G) is to activate a pneumatic cylinder of the horizontal resistance spot welding machine to push the movable electrode to move horizontally to make the heat pipe to be processed The opening of the neck end of the tube is pressed by the movable electrode and the fixed electrode, and a large current is used to generate a large amount of resistance heat at the contact point of the opening, and is heated to a temperature slightly larger than the melting temperature of the heat pipe shell to be processed, and the shrink end is The opening is welded and sealed to complete the sealing. The heat pipe degassing and sealing method according to claim 11, wherein the movable electrode and the fixed electrode have opposite polarities. The heat pipe degassing and sealing method according to claim 11, wherein one of the movable electrode and the fixed electrode contact surface is a concave surface, and the other one is a convex surface that is matched with each other. The method for degassing and sealing a heat pipe according to claim 11 , wherein the power line is electrically connected to a power source. The method for degassing and sealing a heat pipe according to claim 18, wherein the power source is a direct current source, an alternating current source or a pulse current source.