TW201300715A - High performance elongated heat pipe structure and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a high performance elongated heat pipe structure, as well as a manufacturing method thereof, which comprises, structurally, a first tube and a second tube jointed to each other. The first and second tubes, after jointed, form an elongated heat pipe having an overall length greater than 35 centimeters. The opposite ends of the first and second tubes form sealing sections. The elongated heat pipe comprises an evaporation section, an adiabatic section, and a condensation section. The elongated heat pipe defines therein a hollow interior in which a working fluid is received. The opposing ends of the first and second tubes forms cut openings that are fit to and lap-jointed to each other and the lap-jointed site is of a fixed configuration that is formed by welding. The evaporation section has an internal wall to which a sintered capillary structure is mounted. The condensation section and the adiabatic section contain therein a second capillary structure and an end of the second capillary structure is jointed to the sintered capillary structure. With such an arrangement, under the specification of elongated heat pipe, the working fluid of the evaporation section may acquire high evaporation efficiency with the sintered capillary structure, while the condensed liquid in the condensation section can be fast guided back to the evaporation section with the second capillary structure so that the elongated heat pipe may have a high performance. Also, the arrangement of two tube jointed to each other facilitates operability and convenience of manufacturing.

Description

High-efficiency long heat pipe structure and manufacturing method thereof

The present invention relates to a heat pipe, and more particularly to an innovative designer of a long heat pipe structure having a pipe length of 35 cm or more and a manufacturing method thereof.

According to the heat transfer of the heat pipe structure, mainly through the heat vaporization of the internal working liquid and the conduction backflow of the capillary to the cooling working liquid; the heat pipe has various types of capillary structure, such as powder sintering type, beam Shape, mesh, groove, etc., different types of capillary structure have different advantages, such as the powder sintered type of capillary structure because of the best combination with the heat pipe wall, so it is most suitable for application as heat pipe heat The capillary structure of the evaporation section is used to obtain the best heat conduction and gasification promoting effect.

For the heat pipe products of the general length specification, no matter what kind of capillary structure is used inside, no difficulty or bottleneck will be encountered in the production process, but when the product required by the client is a long heat pipe, the length of the pipe body exceeds 35 cm, which makes the molding of the internal capillary structure face the problem of manufacturing difficulty. In the case of sintered capillary structure, it must be formed by a mandrel as an internal mold, and the mandrel is considered to be removable. Modularity, so it is set as a cone-shaped rod, but this type of tapered rod has a length limitation, and once the length of the demand is too long, it cannot be implemented.

Although the long heat pipe can completely abandon the sintered capillary structure and replace it with other types of capillary structure, the evaporation section of the long heat pipe will adopt other bundles, mesh bodies, grooves, etc. Capillary structure is difficult to obtain the best heat conduction and gasification promoting effect, which leads to poor performance of the finished product and does not meet the requirements of the client.

Therefore, in view of the problems existing in the use of the above-mentioned conventional long heat pipes, how to develop an innovative invention design that can be more ideal and practical, and the relevant industry should further consider the goals and directions of breakthrough.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

The main object of the present invention is to provide a high-efficiency long heat pipe structure and a manufacturing method thereof, and the problem to be solved is to develop a new high-efficiency long heat pipe structure which is more ideal and practical. And the manufacturing method is considered as a goal; one of the technical features of the present invention is to provide a high-efficiency long heat pipe structure, which comprises: a first pipe body and a second pipe body joined to each other, The first and second tubes are joined to form a long heat pipe having a total length of 35 cm or more; the first and second tubes form a sealing portion with respect to the outer end, and the long heat pipe includes an evaporation section, an adiabatic section and condensation. a segment, the inner portion of the long heat pipe defines a hollow interior containing the working fluid; and the first and second pipe bodies are provided with a cut-shaped interface at opposite inner ends to be lapped and lapped, and the lap joint is The inner wall of the evaporation section is provided with a sintered capillary structure, and the second capillary structure is disposed in the condensation section and the adiabatic section, and one end of the second capillary structure is connected to the sintered capillary structure.

The second technical feature of the present invention is to provide a method for manufacturing a long heat pipe, which mainly comprises preparing a first pipe body and a second pipe body, respectively, and within the predetermined phase joint of the first and second pipe bodies. The end is divided into any interface; the first and second tubes are separated from the outer end by a sealing portion, and one of the joints is provided with a pumping port; then the first and second tubes are planned as a long type The position of the evaporating section, the adiabatic section and the condensing section of the heat pipe; and a sintered capillary structure is formed on the inner wall of the evaporation section by means of pre-sintering; and the inner wall of the heat insulating section and the condensation section is formed to form a a second capillary structure; the first and second tubes are joined by their cutting interfaces to form a long heat pipe having a hollow interior, and the joint is fixed by brazing, and the second capillary is made One end of the tissue is in contact with the sintered capillary structure; then the working fluid is injected into the hollow interior of the long heat pipe through the pumping port, and then the hollow interior is evacuated through the pumping port, and finally the mouth is sealed, thereby making the high efficiency The long heat pipe can be finished.

With this innovative and unique design, the present invention can achieve high evaporation efficiency by the sintered capillary structure, and the cooling liquid of the condensation section, according to the prior art, under the condition of the long heat pipe specification, the working fluid of the evaporation section can obtain high evaporation efficiency. The second capillary structure can be quickly guided back to the evaporation section, thereby achieving the high-efficiency advantage of the long heat pipe, and the double-pipe docking mode can achieve better industrial utilization with both manufacturing feasibility and convenience. benefit.

Please refer to the first, second, and third figures, which are preferred embodiments of the high-performance long heat pipe structure of the present invention and a manufacturing method thereof, but the embodiments are for illustrative purposes only, and are not applicable to the patent application. The high-performance long heat pipe structure includes a first pipe body 10 and a second pipe body 20 which are joined to each other, and the first pipe body 10 is joined to the second pipe body 20 The long heat pipe A having a total length of 35 cm or more is formed; wherein the first pipe body 10 and the opposite outer end of the second pipe body 20 form a sealing portion 11 and 21, and the long heat pipe A includes an evaporation section B1. The insulating section B2 and the condensing section B3, and the hollow heat pipe A defines a hollow interior 30 which forms a vacuum state, the hollow interior 30 houses a working fluid 31 (indicated in FIG. 3); and wherein: the first tube The opposite inner ends of the body 10 and the second tubular body 20 are provided with the cutting interfaces 12, 22 for lap jointing, and the lap joints of the body 10 are brazed (ie, the welding temperature is greater than 450°). The type, in order to achieve the best combination of firmness, can effectively avoid the cracking of the long heat pipe A when it is deformed by bending a phenomenon to maintain the vacuum state of the hollow interior of the long heat pipe; the inner wall of the evaporation section B1 is provided with a sintered capillary structure 40 (such as a copper powder sintered molder) to obtain an optimum heat conduction and gasification promoting effect; A second capillary structure 50 is disposed in the condensation section B3 and the heat insulation section B2 as a capillary guiding structure for returning the working fluid 31 to the evaporation section B1, and the sintered capillary structure 40 of the second capillary structure 50 and the evaporation section B1 is made. The second capillary structure 50 may be formed by any type of capillary structure such as a sintered type, a bundle shape, a mesh shape or a groove shape.

Wherein, the specific joint type between the first inner tube 10 and the opposite inner end of the second tube body 20 is provided as shown in FIG. 3, and the difference in the diameter of the tube may be inserted into each other. The embodiment of the lap joint (Note: including expanding or shrinking the tube); or as shown in FIG. 4, the joint pattern between the cutting interfaces 12 and 22 may be equal to each other and then connected to each other. A sleeve 60 set of lap joint embodiments.

As shown in FIG. 5, another embodiment of the configuration of the evaporation section B1 and the condensation section B3 of the long heat pipe A is provided. The evaporation section B1 of the present embodiment is divided into the first pipe body 10 and the second pipe body. At the opposite outer end of 20, the condensation section B3 is disposed at a position opposite the inner end section of the first tube body 10 and the second tube body 20.

Wherein, the extension type of the long heat pipe A can be set to a straight shape (as disclosed in Figures 1, 2, and 3), or the long heat pipe A as disclosed in Fig. 6, and the extension type is set to be curved. The shape is not limited in view of the requirements of the environment. The heat pipe A shown in Figure 6 is bent into a similar pattern, so that both ends of the evaporating section are in contact with the same heat source 70. (For example, CPU), the middle section is set to the side of the heat-dissipating fin seat 81 of the air outlet of the heat-dissipating fan 80 (refer to the internal heat-dissipating section and the condensation section configuration type of the long heat pipe of this example). That is, it is shown in Fig. 5; and the tube section of the long heat pipe A can be set to any shape of a circular shape or a flat shape.

The first pipe body 10 and the second pipe body 20 may both be copper pipes; or the first pipe body 10 and the second pipe body 20 may be one of a copper pipe and the other is an aluminum pipe. In this embodiment, since the copper and aluminum tubes can also achieve the brazing joint fixing effect, and the aluminum tube cost is lower than the copper tube, the economic benefit of further reducing the cost is obtained, and the function is unchanged.

The high-efficiency long heat pipe disclosed in the present invention comprises the following steps in terms of its manufacturing surface: (refer to FIG. 7) As disclosed in FIG. 7(a), a first pipe body is separately prepared. 10 and a second tubular body 20, and the inner ends of the first tubular body 10 and the second tubular body 20 are intended to be joined to each other, and the outer interfaces 12 and 22 are respectively disposed; as disclosed in FIG. 7(a), The opposite ends of the first tube body 10 and the second tube body 20 are respectively provided with sealing portions 11 and 21, and one of the joint portions 21 is provided with a mouthpiece 23; as shown in FIG. 7(a), The first pipe body 10 and the second pipe body 20 are planned as the section positions of the evaporation section B1, the adiabatic section B2 and the condensation section B3 of the long heat pipe; as disclosed in FIG. 7(b), by Sintering means forming a sintered capillary structure 40 on the inner wall of the evaporation section B1; as shown in FIG. 7(b), forming a second capillary structure on the inner wall of the heat insulating section B2 and the condensation section B3 50. As shown in FIG. 7(c), the first pipe body 10 and the second pipe body 20 are sleeved and joined by the cutting interfaces 12 and 22 to form a long heat pipe having a hollow interior 30. A, and by means of brazing, the joint is fixed, And the end of the second capillary structure 50 of the second tubular body 20 is in a state of being in contact with the sintered capillary structure 40 of the first tubular body 10; as disclosed in FIG. 7(d), the through-port 23 is A working fluid 31 is injected into the hollow interior 30 of the elongated heat pipe A, and the hollow interior 30 of the elongated heat pipe A is evacuated through the suction port 23 (as indicated by an arrow L1); It is disclosed that the mouthpiece 23 (which can be soldered) is sealed, whereby the high-performance long heat pipe A product is produced.

Advantages of the invention:

The "high-performance long heat pipe structure and its manufacturing method" disclosed in the present invention can be controlled by the prior art according to the prior art, and the working fluid of the evaporation section can be formed by the sintering type under the condition of the long heat pipe. The capillary structure obtains high evaporation efficiency, and the cooling liquid of the condensation section can be quickly guided back to the evaporation section through the second capillary structure, thereby achieving the advantage of high efficiency of the long heat pipe and the double pipe body The docking method achieves better industrial utilization benefits that take into account manufacturing feasibility and convenience.

Moreover, the first and second tubular bodies are provided with a cut-shaped interface at the inner end and are respectively lapped and joined by a brazing joint to achieve the best combination and firmness, thereby effectively preventing the long heat pipe from being deformed by bending. Cracking occurs.

The above embodiments are intended to be illustrative of the present invention, and are not to be construed as limiting the scope of the invention. The principles are changed and modified to achieve an equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

A. . . Long heat pipe

10. . . First tube

11. . . Sealing department

12. . . Tangential interface

20. . . Second tube

twenty one. . . Sealing department

twenty two. . . Tangential interface

twenty three. . . Draw

B1. . . Evaporation section

B2. . . Adiabatic section

B3. . . Condensation section

30. . . Hollow interior

31. . . Working fluid

40. . . Sintered capillary structure

50. . . Second capillary tissue

60. . . casing

70. . . Heat source

80. . . Cooling fan

81. . . Heat sink fin seat

Fig. 1 is a perspective view showing the combination of preferred embodiments of the long heat pipe structure of the present invention.

Fig. 2 is an exploded perspective view of a preferred embodiment of the long heat pipe structure of the present invention.

Figure 3 is a cross-sectional view showing a combination of preferred embodiments of the long heat pipe structure of the present invention.

Fig. 4 is a view showing another embodiment of the tubular body lap joint type of the present invention.

Fig. 5 is a view showing another embodiment of the evaporation section configuration type of the present invention.

Fig. 6 is a view showing an embodiment of the long heat pipe of the present invention in a curved state.

Figure 7 is a schematic view showing the steps of the manufacturing method of the present invention.

A. . . Long heat pipe

10. . . First tube

11. . . Sealing department

12. . . Tangential interface

20. . . Second tube

twenty one. . . Sealing department

twenty two. . . Tangential interface

B1. . . Evaporation section

B2. . . Adiabatic section

B3. . . Condensation section

30. . . Hollow interior

31. . . Working fluid

40. . . Sintered capillary structure

50. . . Second capillary tissue

Claims (7)

A high-performance long heat pipe structure comprises: a first pipe body and a second pipe body joined to each other, and the first pipe body and the second pipe body are combined to form a long heat pipe with a total length of 35 cm or more The first tubular body and the opposite outer end of the second tubular body form a sealing portion, the elongated heat pipe includes an evaporation section, a heat insulating section and a condensation section, and the elongated heat pipe defines a hollow interior formed in a vacuum state, The hollow interior is provided with a working fluid; and wherein the opposite inner ends of the first tube body and the second tube body are provided with a cutting interface to be in a nested and overlapping manner, and the sleeve is overlapped The utility model relates to a brazing joint fixing type, thereby maintaining a vacuum state of the hollow interior of the long heat pipe; the inner wall of the evaporation section is provided with a sintered capillary structure; and the second capillary structure is provided in the condensation section and the heat insulation section as a work. Returning the fluid to the capillary guiding structure of the evaporation section, and contacting one end of the second capillary structure with the sintered capillary structure of the evaporation section; thereby, under the condition of the long heat pipe, the working fluid of the evaporation section can Sintering The fine structure obtains high evaporation efficiency, and the cooling liquid of the condensation section can be quickly guided back to the evaporation section through the second capillary structure, thereby achieving the high efficiency of the long heat pipe and the feasibility and convenience of manufacturing. Sex. According to the high-performance long heat pipe structure and the manufacturing method thereof according to claim 1, wherein the first pipe body and the second pipe body are provided with a difference in pipe diameter between the opposite ends of the second pipe body. The lap joint, the equal diameter of the pipe joints are connected to each other, and the ferrule is overlapped by one of the sleeve sets. The high-performance long heat pipe structure and the manufacturing method thereof according to claim 1, wherein the second capillary structure is a capillary structure of any type such as a sintered type, a bundle shape, a mesh shape or a groove shape. Composition. The high-performance long heat pipe structure and the manufacturing method thereof according to claim 1, wherein the extension type of the long heat pipe is set to be straight or curved, and the pipe section of the long heat pipe is set to Round, flat shape. The high-performance long heat pipe structure and the manufacturing method thereof according to claim 1, wherein the first pipe body and the second pipe body are both copper pipes. The high-performance long heat pipe structure and the manufacturing method thereof according to claim 1, wherein the first pipe body and the second pipe system are ones of copper pipes and the other is aluminum pipes. A method for manufacturing a high-efficiency long heat pipe refers to a method for manufacturing a long heat pipe having a total length of 35 cm or more, comprising: preparing a first pipe body and a second pipe body, respectively, and in the first pipe body, The inner end of the second pipe body is divided into the outer end, and the outer end of the first pipe body and the second pipe body are respectively provided with a sealing portion, and one of the joint portions is provided with a pumping port; The first pipe body and the second pipe body are used as the segment positions of the evaporation section, the heat insulation section and the condensation section of the long heat pipe; and a sintered capillary structure is formed on the inner wall of the evaporation section by means of pre-sintering; Forming a second capillary structure on the inner wall of the heat insulating section and the condensation section; and forming a long heat pipe having a hollow interior by laminating the first pipe body and the second pipe body with the cutting interface thereof And the joint is fixed by brazing, and one end of the second capillary structure of the second pipe body is in contact with the sintered capillary structure of the first pipe body; a working fluid is transmitted through the pumping port Injecting into the hollow interior of the long heat pipe, and then passing through the pair of nozzles The hollow interior of the long heat pipe is evacuated; the pumping port is sealed, thereby preparing the high-performance long heat pipe product, and the section is provided with the section of the sintered capillary structure as the evaporation section, and The second tube body is provided with a section of the second capillary structure as the adiabatic section and the condensation section.