KR20040051219A - Plate Heat Pipe - Google Patents

Abstract

PURPOSE: A plate type heat pipe is provided to prevent a center part of a heat pipe from bending and prevent a gap from generating between cases and a wick by inserting support parts. CONSTITUTION: A first case(100) and a second case(110) formed in regular square shape form an upper plate and a lower plate respectively, wherein both ends of the first and second cases are adhered closely to each other and centers thereof are separated from each other to form a square hollow section. A porous wick(300) is adhered closely to inner wall surfaces of the first and second cases in association with a length direction. A plurality of rod-shaped support parts(400) are inserted into the wick to support upper and lower parts of the wick with adhering the upper and lower parts of the wick closely to upper and lower parts of the cases.

Description

Plate Heat Pipe

The present invention relates to a heat pipe for cooling an electronic device, and more particularly, by using a plate as a case, the surface area is wider, and thus the thermal conductivity can be improved, and a rod-shaped support structure is formed along a longitudinal direction between embedded wicks. The present invention relates to a plate-shaped heat pipe that can prevent wick installation and wick and case and detachment from a wider variety of shapes by taking an insert structure.

In general, heat pipes contain a material called a heat medium or a working fluid, which exists under various temperature ranges from cryogenic to ultrahigh temperature, and water, mercury, methanol, acetone, and the like typically belong to the heat pipe.

In addition, a so-called wick (pore material) is embedded from one side to the other side along the axial direction so that the heat absorbed from one side rises to the other side when the working fluid vaporizes to release heat, and then the capillary phenomenon through the pores of the wick. And by the cycle of returning to the origin by gravity again.

A heat pipe operated on this principle is installed as a cooler in high heat generating electronic parts such as a CPU which functions as a heat sink and functions as a central processing processor in a high performance computer, or a heat exchanger that absorbs heat from a refrigerator or an air conditioner. It is installed as).

Commonly used heat pipes, as shown in Figure 1, generally take the form of a pipe of a circular cross-section, the pipe 10 provided as a case contains the aforementioned wick 20 and the working fluid At the time, the inside of the pipe 10 is in a vacuum state. Both ends of the pipe 10 are sealed to maintain a vacuum.

In order to contact such a heat pipe with an electronic device having a large amount of heat, a heat block made of aluminum or copper is generally made, and the heat pipe is connected thereto, and the heat block is brought into contact with the electronic device. It is common to use polymer-based adhesives for the complete joining of heat blocks and heat pipes.

At this time, in order to widen the contact surface of the heat pipe, the heat block, and the electronic device, the heat pipe may be pressed flat and mounted. However, when the heat pipe is pressed flat, there is a problem that the heat pipe does not operate smoothly due to the deformation of the wick 20 inside the pipe 10 as shown in FIG. 2.

This is because, as described above, when the heat pipe is pressed, a gap is generated between the wick 20 and the pipe 10 surrounding the outside thereof, so that heat absorption and movement are not smooth.

The inner wick 20, which is the core of the heat pipe, can be classified into a groove type, a mesh type, and a sintered type. The wick may be classified according to a target material to be cooled. The shape and thickness of 20 can be adjusted.

If the groove type wick 20 is mounted, the capillary force is changed according to the width, height, and spacing of the groove. Generally, the capillary force is large when the width and spacing are narrow and the height is high.

And when the mesh type wick 20 is mounted, the smaller the size of the mesh, the greater the capillary force, and the shape of the mesh is divided into a normal orthogonal type and a braided type. The double braided mesh has a large capillary force. Known.

In addition, the sintered type wick 20 is formed through a process of sintering copper powder to a predetermined thickness on the inner wall of the pipe 10. Capillary force is generated through the space between the copper powder particles and the particle size of the copper powder and The capillary force changes according to the thickness of the wick 20.

In addition, the working fluid is generally injected after making the inside of the pipe 10 in which the wick 20 is formed in a vacuum state, and the filling amount of the working fluid is injected differently according to the shape or type of the wick 20.

As described above, in the case of the conventional circular heat pipe, in order to increase the contact area with the heating element, an additional heat block is mounted or the heat pipe itself is pressed flat. In this case, however, as shown in FIG. 2, the pipe 10 and the wick 20 are pressed, and the space between the pipe 10 and the wick 20 is separated by a predetermined gap, thereby creating an empty space.

However, as the heat pipe itself has a driving principle of using capillary force, such an empty space causes the capillary force to drop sharply or to block the return of the working fluid from the condenser to the evaporator, thereby preventing the heat pipe from operating normally.

In addition, when the heat pipe is pressed flat, the internal volume is reduced as compared with the circular case, which hinders the smooth movement of the gas issued by the evaporator. In general, when the heat pipe is applied to the cooling of the electronic component, the heat pipe may be mounted in a straight line shape, but in most cases, bending is required due to the narrowness of the mounting space.

At this time, the banding portion, as described above, occurs between the pipe 10 and the wick 20.

The heat pipe may have a rectangular pipe structure, but in this case, the contact area with the heating element is larger than that of the circle, and the heat pipe does not need to be pressed flatly. However, when the heat pipe is banded, as with the circular heat pipe, The phenomenon that occurs between the pipe and the wick 20 is difficult to prevent, and furthermore, there is a problem that the bending itself is difficult.

As described above, the most important thing in the operation and configuration of the heat pipe is the wick 20 mentioned above. The type of the groove of the wick 20 is to form grooves during compression or drawing operations, and the sintered type forms fine metal powder. Sintered, mesh type is a woven of fine metal wire. Among them, a sintered type and a mesh type are frequently used in terms of performance, but a mesh type is known to be easier in the manufacturing process.

In the case of the sintering type, the mandrel is placed in the center of the pipe 10 and the metal powder is filled between the mandrel and the pipe 10, and the wick 20 is formed by sintering in a vacuum furnace. It is difficult and the manufacturing process is somewhat complicated.

In the case of manufacturing the mesh type, the manufacturing process is simple because the mesh structure is rolled and inserted into the pipe 10 in advance, but the adhesion between the pipe 10 and the wick 20 is inferior to that of the sintered type, and molding such as banding is performed. If so, there is a problem that the adhesion between the pipe 10 and the wick 20 is further reduced.

Increasingly, the miniaturization of electronic equipment is rapidly progressing and the heat generation amount of the heating element is further increased. Therefore, the diameter of the heat pipe should be very small, in this case there is a limit to the existing heat pipe applied to the electronic equipment due to the above-mentioned problems.

Therefore, it is urgent to develop a heat pipe having a form suitable for better cooling performance and mounting in response to miniaturization and increased heat generation amount.

Therefore, the present invention has been made in view of the above-described conventional problems, the first object of the present invention, by adopting a case made of a square plate material can express a higher thermal conductivity than a wider surface area, for an electronic device It is to provide a plate heat pipe that can increase the contact area.

A second object of the present invention is to provide a plate-shaped heat pipe which can insert a structure for supporting the inside of the wick so that no space is created between the wick and the case when the case is pressed and pressed.

The object of the present invention, the central portion is spaced apart from each other at a constant height while being coupled to each other, the hollow cross section of the square formed along the width direction is continuous in the longitudinal direction, and each end portion is perpendicular to the direction of separation so that the corresponding close contact. A first case and a second case extending or bent;

A wick in close contact with the inner wall surface of each of the combined cases; And

And a plurality of support parts in the form of copper or aluminum rods inserted into the inner side of the wick in the longitudinal direction and arranged in parallel at regular intervals along the width direction to support the inner side of the wick and each case in the height direction. It is achieved by a plate heat pipe characterized in that.

In this case, the first case and the second case is preferably a form that is symmetrical in shape with both sides vertically bent and horizontally extended with respect to a central portion of a constant width.

In addition, the first case is preferably a plate shape in which both sides are vertically bent and horizontally extended with respect to a central portion having a constant width, and the second case is horizontally extended with both sides with respect to a central portion having a constant width.

In addition, the object of the present invention as described above, the rectangular hollow cross section formed along the width direction by repeating the bending is continuous in the longitudinal direction, both ends of the integral case is bent or extended to be in close contact with each other;

A wick in close contact with the inner wall of the case in a shape; And

And a plurality of support parts inserted into the inner side of the wick in the longitudinal direction and arranged in a line at a predetermined interval along the width direction to support the inner side of the wick and the case along the height direction. It is achieved by a plate heat pipe.

In this case, it is preferable that a rod-shaped fixing part welded or adhesively coupled to each end of each support part is provided.

Or it is preferable to be provided with a rod-shaped fixing portion integrally formed over each end of each of the supporting portion.

At this time, it is preferable that each support part located on both sides relatively to the width direction is made by sintering copper or aluminum powder in the shape and size corresponding to the support part located in the center relatively.

In addition, it is preferable that each support portion positioned on both sides of the width direction relatively is formed by winding or laminating the net a plurality of times in a shape and size corresponding to the support portion positioned relatively in the center.

Here, the wick is preferably a sintered type made by sintering copper or aluminum powder so as to correspond in shape to the inner wall surface of each case.

In addition, the wick is preferably a mesh type formed by winding a plurality of layers or more so that a metallic mesh corresponds in shape to each inner wall surface of each case.

Alternatively, the wick may be a mesh type in which a mesh of a metal material is in close contact with the upper and lower inner wall surfaces of the case in a shape corresponding to the height.

In addition, the wick is preferably a mesh type in which an integral metallic mesh forming a hollow hollow section in one piece is in close contact with the inner wall of each case in a shape.

In addition, it is preferable that any one of the two ends of each case in close contact with each other is repeatedly bent to include the other and welded or bonded.

Alternatively, both ends of each case in close contact with each other form a symmetrical shape, and each end portion facing in one direction is preferably joined by welding or adhesion.

And it is preferable that the vacuum tube is fitted to any one of both sides around the longitudinal direction of each case is provided by welding or adhesion.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

1 is a cross-sectional structural view of a conventional heat pipe,

2 is a cross-sectional structural view of a state diagram in which a conventional heat pipe is pressed and pressed;

3 is a perspective view of a plate heat pipe according to the present invention,

4 is a first configuration diagram of a heat pipe case according to the present invention;

5 is a cross-sectional view of the sintered type wick according to the present invention;

Figure 6 is a first cross-sectional view showing a combined state of both ends of the case according to the present invention,

7 is a second cross-sectional view showing a combined state of both ends of the case according to the present invention;

8 is a first configuration of the support portion according to the present invention

9 is a second configuration of the support according to the present invention,

10 is a second configuration diagram of a heat pipe case according to the present invention;

11 is a third configuration diagram of a heat pipe case according to the present invention;

12 is a first configuration diagram of a mesh type wick according to the present invention;

13 is a second configuration of a mesh type wick according to the present invention;

14 is a third configuration of the mesh type wick in accordance with the present invention;

15 is a perspective view showing a state in which the vacuum tube according to the present invention is coupled.

<Description of the code | symbol about the principal part of drawing>

10: pipe 20: wick

100: first case 110: second case

200: case 300: wick

400: support portion 410: fixed portion

500: junction portion 600: groove portion

610: vacuum tube

Next, a plate heat pipe according to the present invention will be described with reference to the accompanying drawings.

Figure 3 is a perspective view of the plate heat pipe, Figure 4 is a first configuration of the heat pipe case, Figure 5 is a cross-sectional view of the sintered type wick according to the present invention, Figure 6 shows a combined state of both ends of the case 1 is a first cross-sectional view, Figure 7 is a second cross-sectional view showing a combined state of the both ends of the case. As shown in Figs. 3, 4, 5, 6 and 7, the plate heat pipe has a rectangular hollow cross section.

To this end, a first case 100 and a second case 110 having a rectangular shape forming an upper plate and a lower plate are provided, and a wick 300 having a porous shape is formed in the inside of each case 100 or 110 along a longitudinal direction. It is provided to correspond closely to the wall surface.

At this time, when the case 100, 110 is pressed by an external force, the wick 300 in the wick 300 along the height direction in order to prevent the wick 300 is separated from the inner wall surface of the case (100, 110) ) And a rod-shaped support portion 400 for supporting the case in contact with the wick 300 are inserted in parallel along the length direction of the cases 100 and 110 at a predetermined interval.

The heat pipe is inserted along a hollow hollow cross-section formed at the center by combining the first case 100 and the second case 110 and the respective cases 100 and 110 formed by repeatedly bending a square plate. It comprises a wick 300 which is seated on each inner wall of (100,110). In addition, as described above, a plurality of support parts 400 inserted along the longitudinal direction of the wick 300 and supporting the upper and lower portions of the wick 300 while being in close contact with the upper and lower portions of the respective cases 100 and 110. Is provided.

Here, the cases 100 and 110 are divided into a first case 100 located at an upper portion and a second case 110 located at a lower portion, and each case 100 and 110 is closely contacted at both ends thereof, and the center thereof is uniformly spaced apart from each other. The rectangular hollow section has a symmetrical shape that is continuous along the longitudinal direction.

Each of the cases 100 and 110 is formed by vertical bending both sides of the rectangular long plate in the same direction through the press working in the same direction, and horizontally bending the end portions thereof again, so that the thermal conductivity is about 1 mm. It is preferable that it consists of copper or aluminum plate material of about thickness.

When the cases 100 and 110 are combined with each other by forming an upper plate and a lower plate, the two ends that are in close contact with each other may be thermally bonded by brazing welding, TIG welding, laser welding, or the like by joining with epoxy or acrylic adhesive, as shown in FIG. 6. The junction 500 is formed.

In addition, as shown in FIG. 7, the joint 500 is formed by pressing one end of each of the two ends to include the other and joining the ends of the extended portions by the above welding method or the use of an adhesive.

In addition, the wick 300 is seated along the longitudinal direction through a rectangular hollow end surface formed by the cases 100 and 110 to closely contact the inner wall surfaces of the cases 100 and 110. In FIG. 5, a sintered type wick 300 is illustrated as an embodiment of the present invention. The wick 300 is molded to correspond to the inner shape of the second case 110 forming the lower plate.

The wick 300 is sintered after forming a metal powder to fit the inner shape of each case (100,110) before coupling the case (100,110). Then, the heat pipes are configured in such a manner as to combine the respective cases 100 and 110.

The metal powder used in the sintering of the wick 300 is preferably copper or aluminum powder, and in consideration of the increased calorific value of the electronic device, various shapes such as spherical shape and irregular shape may be used. In addition, the copper powder which can vary the size of the powder to several tens to several hundred micrometers according to the size of the heat pipe to be produced is preferable. At this time, the sintering temperature for the copper powder is preferably about 800 to 900 ° C, and the sintering time is preferably about 30 minutes to 1 hour.

In addition, the support 400 is preferably a rod having a variety of cross-sectional shapes, such as triangular, square, circular, but in one embodiment of the present invention, a support 400 made of copper or aluminum of a rectangular cross section is used.

If the thickness of each case (100,110) is relatively large and the strength against external pressure is large, the use of the support part 400 is unnecessary, but the inside of the heat pipe is generally in a vacuum state and is coupled to a relatively large external force with respect to the electronic device. Considering it is preferred that the rod-like support 400 is inserted into the wick 300.

Each support unit 400 is inserted along the longitudinal direction in the interior of the wick 300 at a predetermined interval from each other and the upper and lower parts are in close contact with the inner upper and lower parts of the wick 300 to form the shape of the wick 300 and each case The shape of (100, 110) can be supported to be maintained against external forces.

At this time, the support portion 400 is fixed at the position and the rod-shaped fixing portion 410 along the width direction of the case (100, 110) at both ends of the support portion 400 so that the arrangement between the support portion 400 is not disturbed ) May be welded or glued together or molded integrally with the support 400. (Shown in FIGS. 8 and 9)

8 is a first configuration of the support according to the present invention, Figure 9 is a second configuration of the support according to the present invention. As shown in FIGS. 8 and 9, the support part 400 is inserted along the longitudinal direction of the wick 300 to support the wick 300 and the cases 100 and 110.

Accordingly, when the case (100,110) is pressed by an external force, the gap between the wick 300 and the case (100,110) is not generated, thereby maintaining the movement path of the vaporized working fluid in the heat pipe and the surface of the heat pipe, that is, the case ( The surface of 100,110 functions to keep the plane at all times.

The support portion 400 is in the form of copper or aluminum rods, and has a parallel arrangement relationship in which a plurality of support portions 400 are positioned at regular intervals as shown in FIG. 8, and is formed in copper or aluminum rods across both ends of each support portion 400. The fixing portions 410 are respectively coupled. In this case, the fixing part 410 is bonded to the support part 400 by welding or bonding.

In addition, the support part 400 and the fixing part 410 may be integrally molded as shown in FIG. 9. In this case, the sizes of the cases 100 and 110 and the wick 300 may be predetermined, and accordingly, the support part 400 may be used. And the fixing part 410 is formed.

10 is a second configuration of a heat pipe case according to the present invention. As shown in FIG. 10, the upper part is the first case 100 and the lower part is the second case 110.

The first case 100 has a shape in which both sides are vertically bent downward and both ends are horizontally bent about the central portion. The second case 110 has a plate shape forming a plane.

At this time, when each case (100,110) is coupled, each end is in close contact with each other and the central portion forms a rectangular hollow cross section. A sintered type wick 300 is mounted in the space of the central portion formed by the cases 100 and 110, and a square space is also formed in the center of the wick 300.

And the support portion 400 of the rectangular cross-section along the longitudinal direction of each of the combined case (100,110) is arranged with a predetermined interval to each other to contact each of the case (100,110) and the wick (300) and the wick (300) I support it.

11 is a third configuration diagram of a heat pipe case according to the present invention. As shown in FIG. 11, the case 200 is vertically bent upwardly and horizontally bent from one end of the left side and then vertically bent downwardly and horizontally bent in one direction to reach one end. Is extended.

As described above, the case 200 is an integral type in which both ends are in close contact with each other, and a hollow hollow cross section is formed at the central portion. The inner side of the case 200 has a wick sintered 300 in the longitudinal direction is seated, a plurality of support units 400 are disposed in the wick 300 in the form of a square rod in the longitudinal direction.

12 is a first configuration diagram of a mesh type wick according to the present invention, FIG. 13 is a second configuration diagram of the mesh type wick, and FIG. 14 is a third configuration diagram of the mesh type wick. As shown in FIGS. 12, 13, and 14, the wick 300 corresponds to a woven or closed mesh for wrapping a mesh of metal material or placing each separated mesh so as to be symmetrical with each other. Braided mesh type.

12 and 13, the wick 300 of the woven mesh type is illustrated. In FIG. 12, the wick 300 is wound around two inner layers of the first case 100 and the second case 110. In this case, the thickness of the wick 300 can be easily adjusted, and the activity of the working fluid between the first case 100 and the second case 110 may be smoother.

And the wick 300 is formed as a structure in which two meshes separated from each other in close contact with the top surface of the upper inner surface of the first case 100 and the bottom surface of the lower inner surface of the second case 110 as shown in FIG. do. In this case, since each of the meshes is likely to be separated from the respective cases 100 and 110, it is necessary to support and insert the support part 400 between the meshes.

When the wick 300 of such a structure is used, the two support parts 400 located on both sides of the support part 400 inserted between the meshes in the width direction are relatively positioned at the center of the copper or aluminum powder. It is preferably made by sintering fabrication according to the shape and size of 400) or by winding or laminating the mesh many times. This is because the wick 300 is absent from both side wall surfaces of the cases 100 and 110 around the width direction, and the two support parts 400 may function as the wick 300.

In addition, the mesh forming one closed curve is provided to be in close contact with the inner side surfaces of the first case 100 and the second case 110 as shown in FIG. 14 to function as the wick 300. When fabricating such a braided mesh type wok, the net is first manufactured in the form of a circular cross section and inserted into the combined first case 100 and the second case 110, and then the support 400 is inserted therebetween. By doing so, the mesh may be in close contact with each case (100, 110). In addition, since it is a monolithic form of a closed curve, the uniform movement of the working fluid may be achieved.

15 is a perspective view showing a state in which the vacuum tube according to the present invention is coupled. As shown in FIG. 15, a groove 600 penetrating the cases 100 and 110 is further formed at one of both sides, that is, one side or the other side, with respect to the longitudinal direction of the heat pipe.

The groove 600 is a portion for inserting a vacuum tube 610 for vacuuming the inside of the heat pipe during the manufacturing process of the heat pipe.

If the heat pipe is a separate type consisting of the first case 100 and the second case 110, a part of each case 100 and 110 penetrates in a semicircle and extends outward. Thus, after the groove 600 is formed, the vacuum tube 610 is inserted. At this time, the insertion portion is bonded by brazing welding, TIG welding, laser welding, or the like, or bonded by epoxy or acrylic adhesive.

In the plate-shaped heat pipe according to the present invention as described above, the support portion 400 can support the inside of the wick 300 and the case (100, 110, 200), such as triangle, circle, pentagon, hexagon, etc., in addition to the bar-shaped cross section. It can be used to select from a variety of rod-shaped, and in addition to the support portion 400 located on both sides relatively, the support portion 400 located in the central portion may also be used in the form of sintering or winding and laminating the mesh.

In addition, the positions in which the two ends are in close contact with each other in the cases 100, 110, and 200 may vary depending on the bending form of the two ends of the cases 100, 110, and 200 as a starting point.

According to the plate-shaped heat pipe according to the present invention as described above, the heat pipe can be prevented from bending due to the insertion of the support portion, and the wick and the case when bending the heat pipe according to the position and shape of the electronic device is applied There is a feature that can be supported so as not to create a gap between the inner wall surface.

In addition, the contact area with respect to the electronic device is increased due to the increase in the surface area contacted to the outside, which is formed as a plate, and has an advantage in that it is easy to mount by taking an angular shape and correspondingly corresponding to the electronic device having a generally angular shape.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will cover such modifications and variations as fall within the spirit of the invention.

Claims (16)

The central portions are coupled to each other at regular heights, and the hollow hollow cross sections formed along the width direction are continuous in the longitudinal direction, and each end portion is extended or bent perpendicularly to the spaced direction so as to be in close contact with each other. A first case 100 and a second case 110; A wick 300 corresponding to a shape corresponding to each inner wall surface of each of the combined cases 100 and 110; And Inserted along the longitudinal direction in the inner side of the wick 300 and arranged in parallel at a predetermined interval along the width direction of the copper or aluminum rod form to support the inner side of the wick 300 and each case (100,110) in the height direction Plate support heat pipe, characterized in that comprises; a plurality of support (400). The method of claim 1, The first case (100) and the second case (110) is a plate-shaped heat pipe, characterized in that both sides are vertically bent and horizontally extended to form a symmetrical shape with respect to the central portion having a constant width. The method of claim 1, The first case 100 has both sides vertically bent and horizontally extended with respect to a central portion having a constant width, and the second case 110 has a plate shape in which both sides are horizontally extended with respect to the central portion having a constant width. Plate heat pipe. A rectangular hollow cross section formed in the width direction by repeating the bending in a continuous direction, and both ends of the integrated case 200 being bent or extended so as to be in close contact with each other; A wick 300 in close contact with the inner wall of the case 200 in shape; And A plurality of copper or aluminum rods inserted into the inner side of the wick 300 along the longitudinal direction and arranged in a line at a predetermined interval along the width direction to support the inner side of the wick 300 and the case 200 along the height direction. The support portion 400 of the plate-shaped heat pipe, characterized in that comprises a. The method according to claim 1 or 4, Plate-shaped heat pipe, characterized in that provided with a rod-shaped fixing portion that is welded or adhesively coupled over each end of each of the support portion 400. The method according to claim 1 or 4, Plate-shaped heat pipe, characterized in that provided with a rod-shaped fixing portion formed integrally over each end of each of the support portion 400. The method according to claim 1 or 4, Each support portion 400 positioned on both sides of the width direction relatively is formed by sintering copper or aluminum powder in a shape and a size corresponding to the support portion 400 positioned relatively in the center. The method according to claim 1 or 4, Each support portion 400 positioned on both sides of the width direction relatively is formed by winding or laminating a plurality of meshes in a shape and size corresponding to the support portion 400 positioned in the center. . The method according to claim 1 or 4, The wick 300 is a plate-type heat, characterized in that the copper or aluminum powder is a sintered type formed by sintering integrally to form a square hollow cross section in the center and to correspond to the inner wall surface of each case (100, 110, 200) in shape pipe. The method of claim 1, The wick 300 is sintered by separately sintering copper or aluminum powder so that a rectangular hollow cross section is formed at the center and correspondingly corresponding to the inner wall surfaces of the first case 100 and the second case 110. Plate type heat pipe, characterized in that the type. The method according to claim 1 or 4, The wick 300 is a plate-type heat pipe, characterized in that the mesh is made of a plurality of layers are wound along the inner wall surface of each case (100, 110, 200) so that the metal mesh is formed in the center of the hollow hollow square. The method according to claim 1 or 4, The wick (300) is a plate-type heat pipe, characterized in that the mesh type is in close contact with each other so as to correspond to the top surface and bottom surface of the metal mesh of the case (100, 110, 200). The method according to claim 1 or 4, The wick 300 is a plate-type heat pipe, characterized in that the mesh type of the integral metal mesh forming a rectangular hollow cross section is in close contact with the shape corresponding to each inner wall surface of each case (100, 110, 200). The method according to claim 1 or 4, Plate-type heat pipe, characterized in that any one of each of the two ends of the case (100, 110, 200) in close contact with each other is repeatedly bent to include the other and welded or bonded. The method according to claim 1 or 4, Each end of each case (100, 110, 200) in close contact with each other forms a symmetrical shape, each end portion facing in one direction is welded or bonded, characterized in that the heat pipe. The method according to claim 1 or 4, Plate-type heat pipe, characterized in that the groove portion 600 is further formed to be welded or bonded by the vacuum tube 610 is inserted into any one of the two sides around the longitudinal direction of each case (100, 110, 200).