KR20100132212A - Heat pipe with double pipe structure - Google Patents

Abstract

PURPOSE: A heat pipe with a double pipe structure, capable of the improvement of thermal performance, is provided to improve the heat exchange efficiency between a pipe main body and an exterior by forming a heat-radiating fin on the outer circumference of the pipe main body. CONSTITUTION: A heat pipe with a double pipe structure comprises a pipe main body, a hollow inner pipe, a sidewall(150), a working fluid, a wick and a heat radiation fin(110). When the both ends of the inner pipe are opened, the inner pipe is arranged inside the main pipe. The sidewall is formed in both ends of the pipe main body and shuts tightly the space between the inner pipe and the pipe main body. The working fluid is inserted in the space. The heat radiation fins are formed on the outer circumference of the pipe main body along the longitudinal direction.

Description

Heat pipe with double pipe structure}

The present invention relates to a heat pipe of the present invention, and more particularly, to a heat pipe having a double pipe structure, in which a heating element can be coupled and heat dissipation (heat exchange) effect is improved.

Heat pipe is used as a heat exchanger that transfers heat efficiently without any force even at small temperature difference by using latent heat of evaporation of working fluid.

The heat pipe is configured by injecting a working fluid into the sealed pipe and evacuating it, thereby forming an evaporation zone, a condensation zone, and an insulation zone between the evaporation zone and the condensation zone.

The evaporation zone is a zone that is heated by an external heat source, and the working fluid receives heat energy and evaporates. The thermal insulation zone is a zone where there is no heat exchange with the outside. In addition, the condensation region is a region in which thermal energy (condensation latent heat) is released while the working fluid (steam) transferred through the adiabatic region is condensed.

Heat pipes are of various types, such as capillary, gravity, rotary, and electromagnetic, depending on the driving force from which the working fluid returns from the condensation zone to the evaporation zone. However, a heat pipe generally refers to a capillary type in which a wick is formed in the heat pipe and uses a capillary phenomenon.

The capillary type is divided into WRAPPED SCREEN TYPE, SINTERED METAL TYPE, and AXIAL GROOVE TYPE depending on the shape of the wick. There is no limit to the installation angle in that it can be.

Wrapped Screen Type is the most popular type of heat pipe used to form wicks by thin metal meshes attached to the inner wall of pipes. Sintered Matal Type forms porous material metal made by sintering metal powder as wicks. Say And the Axial Groove Type is a way to make a fluid flow in the groove by making a groove in the inner wall of the pipe. The fluid filled in the grooves forms a concave meniscus, which generates capillary force. There are many other forms of Wick.

On the other hand, the heat pipe is often formed in a single tube structure, and forms the transfer passage of the working fluid evaporated into the inner space in the state that the wick is formed on the wall surface of the pipe.

However, such a heat pipe has a limitation in terms of efficiency of heat exchange, and when the heating element needs to be connected to the heat pipe, there is a problem in that a separate connector for connection is provided.

The present invention devised to solve the above-described problem of the heat pipe, an object of the present invention is to provide a heat pipe with improved heat exchange efficiency by forming a fin (Fin) on the outside and a hollow pipe therein.

In addition, another object of the present invention is to provide a heat pipe in which a heating element can be screwed to a hollow pipe provided therein.

In order to solve the above problems, a heat pipe having a double pipe structure according to the present invention includes a hollow pipe body; A hollow inner tube provided at an inside of the pipe main body while both ends are opened so that an inner space communicates with the outside; Sidewalls formed at both ends of the pipe body to seal a space between the pipe body and the inner tube; A working fluid injected into the space; And a wick formed on the inner side of the pipe body to move the working fluid from one side of the pipe body to the other side by a capillary phenomenon.

In addition, the outer peripheral surface of the pipe body may further include a heat radiation fin is formed along the longitudinal direction of the pipe body.

In addition, the wick may be formed in a groove shape on the inner surface of the pipe body, and the heat dissipation fin and the wick may be integrally formed with the pipe body in the process of forming the pipe body by extrusion molding.

In addition, a screw groove in which the heating element may be detachably screwed may be formed on an inner circumferential surface of the open end of the inner tube.

According to the present invention, since the inner tube is provided inside the pipe main body, the space between the pipe main body and the inner tube, which becomes the moving space of the working fluid, becomes small, thereby increasing the capillary force by the wick.

In addition, the heat radiation fins are formed on the outer circumferential surface of the pipe body, so that the heat exchange efficiency between the pipe body and the outside is improved without a separate heat dissipation means.

In addition, since the pipe body in which the heat dissipation fins and the wick are formed can be manufactured through one process of extrusion molding, the manufacturing process is simplified and the manufacturing cost is reduced.

In addition, since the heating element can be detachably coupled by screwing through one end of the inner tube, there is an advantage that it is not necessary to provide a separate connector for connection between the heating element and the heat pipe.

In addition, since the electric line connected to the heating element can be arranged so as not to be exposed to the outside by utilizing the inner space of the inner tube, there is an advantage in providing a clean appearance when the heat pipe of the present invention is combined with various electrical devices.

In addition, since the heat generating element is coupled to the inner tube by screwing, the heat dissipation heat transfer area is widened to the surface of the screw groove, thereby improving heat transfer efficiency from the heat generating element. In addition, efficient heat exchange between the heating element and the heat pipe and between the heat pipe and the outside solves the problem of component damage of the heating element due to heat generation.

With reference to the accompanying drawings, a preferred embodiment of the present invention will be described in detail, the same reference numerals denote the same member having the same function.

1 is a perspective view of a heat pipe according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the II-II line shown in FIG. 1, FIG. 3 is a cross-sectional view of the III-III line shown in FIG. 1, FIG. Sectional view showing a state in which the heating element is coupled to the inner tube shown.

1 to 4, the heat pipe 1 of the double pipe structure according to the present embodiment, the pipe body 100, the inner pipe 200, the wick 300, the working fluid (not shown) It is made to include.

The pipe body 100 forms an outer tube of the heat pipe 1 according to the present embodiment, and a cylindrical and hollow pipe may be presented as an example. However, the present invention is not limited to the cylindrical shape and may be formed in various other shapes.

The pipe body 100 preferably has sufficient pressure resistance to cope with a phase change in which the working fluid injected below is evaporated and condensed, and various materials such as aluminum, stainless steel, and carbon steel may be selected.

A heat dissipation fin 110 may be formed on an outer circumferential surface of the pipe body 100. The heat dissipation fin 110 transfers heat (heat energy) transferred to the pipe main body 100 to the outside of the pipe main body 100 quickly, thereby improving heat exchange between the pipe main body 100 and the outside. At this time, the heat transmitted to the pipe main body 100 is directly transferred from the heating element 20 to the pipe main body 100, and from the working fluid to be described later received heat directly from the heating element 20 to the pipe main body 100 again. It includes heat transferred. For example, the heat dissipation fin 110 may be formed of a plurality of ones formed integrally with the pipe main body 100 along the longitudinal direction of the pipe main body 100 and spaced apart in the circumferential direction.

A wick 300 is formed on the inner circumferential surface of the pipe body 100. The wick 300 refers to a structure or shape for returning the working fluid of the liquid condensed in the condensation region 13 from the condensation region 13 to the evaporation region 11 by capillary action. Can be applied. However, in FIG. 3, an example of a wick 300 having a groove shape is provided on an inner side surface of the pipe body 100 as an example of the wick 300, and a groove type wick 300 is formed. There is an advantage that the heat dissipation fin 110, the wick 300 and the pipe body 100 can be manufactured integrally through a single process of extrusion molding.

Inside the pipe body 100, a hollow inner tube 200 is provided. In FIG. 3, the cylindrical inner tube 200 is illustrated, but is not limited thereto, and may be formed in various other shapes.

The inner tube 200 is open at both ends so that the inner space 202 communicates with the outside, and is provided inside the pipe main body 100 while maintaining the open state at both ends.

The working fluid is injected into the space 10 between the outer circumferential surface of the inner tube 200 and the inner surface of the pipe body 100. The working fluid may be ammonia, freon, methanol, water, acetone and the like excellent in vaporization.

The space 10 into which the working fluid is injected is a region in which the evaporation region 11 receives heat energy from the external heating element 20 and the working fluid evaporated in the evaporation region 11 moves to the condensation region 13. Phosphorus adiabatic zone 12 and a condensation zone 13 in which the working fluid in the evaporated state is condensed, and the working fluid condensed in the condensation zone 13 is returned to the evaporation zone 11 by the wick 300. It becomes a moving space.

The working fluid should not leak to the outside during the movement. For this purpose, as shown in FIGS. 1 and 2, the side wall 150 sealing the space 10 at both ends of the pipe body 100 includes a pipe body 100. And it may be formed integrally with the inner tube (200). Alternatively, although not shown, separate sidewalls may be coupled to both ends of the pipe body 100 to seal the space 10. However, the above-described side wall 150 is only an example, and various other means or methods for allowing the space 10 to be sealed may be provided.

The inner tube 200 may be manufactured to be integrated with the pipe body 100 and the side wall 150 as shown in FIG. 2. Alternatively, although not shown, it may be made of a separate configuration that is penetrated through the inside of the pipe body 100.

In the case where the inner tube 200 is formed in a separate configuration, and the side wall 150 described above is provided at both ends of the pipe body 100 so that the inner tube 200 penetrates the side wall 150, In order for the space 10 to be sealed by the side wall 150, the inner tube 200 passing through the side wall 150 may be formed by a screwing method in which an outer circumferential surface thereof is welded or packed with the side wall 150. Can be combined with each other.

In the heat pipe 1 of the present embodiment provided with the inner tube 200, the working fluid is evaporated as shown in FIG. 3 as compared with the heat pipe of the conventional single tube structure without the inner tube 200. Since the space 10 moving between the condensation region 13 and the condensation region 13 becomes smaller, a capillary force for returning the working fluid condensed in the condensation region 13 to the evaporation region 11 becomes more. There is a growing advantage.

In the pipe body 100, a separate hole (not shown) may be formed to inject working fluid into the space 10 or to evacuate the space 10, and the hole may be sealed later, so that the space ( The complete hermetic structure of 10) can be formed.

Meanwhile, the inner tube 200 may have a screw groove 201 formed on an inner circumferential surface of one end portion of the inner tube 200 opened as shown in FIG. 4. As the screw groove 201 is formed, an external heating element, for example, a screw type heating element 20 in which a light emitting diode is mounted, may be screwed at one end of the inner tube 200. That is, the heat pipe 1 of the present embodiment is made of a double pipe structure provided with the inner tube 200, to provide a structure in which the heating element 20 can be detachably coupled to one end of the inner tube 200. do. In addition, since the inner tube 200 is hollow, the inner space 202 of the inner tube 200 provides a space 10 in which the electric wire 21 connected to the heating element 20 can be disposed. do.

In addition, the surface of the screw groove 201 formed in the inner tube 200 forms a coupling surface with the heating element 20, the heat transfer area from the heating element 20 is widened in that it consists of the screw groove 201 You get an effect. Therefore, there is an advantage that the heat transfer from the heating element 20 to the heat pipe 1 is improved.

On the other hand, one side away from the heating element 20 of the space 10 between the inner tube 200 and the pipe main body 100 is the above-mentioned condensation region 13 to condense the working fluid in the evaporation state, the heating element 20 The other side close to) becomes the above-mentioned evaporation zone 11 where the working fluid receives heat and evaporates.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It is not limited.

1 is a perspective view of a heat pipe according to an embodiment of the present invention,

2 is a cross-sectional view taken along the line II-II shown in FIG. 1;

3 is a cross-sectional view of the III-III line shown in FIG.

Figure 4 is a cross-sectional view showing a state in which the heating element is coupled to the inner tube shown in FIG.

Explanation of symbols on main parts of the drawings

One; Heat pipe 10; space

11; Evaporation zone 12; Insulation Zone

13; Condensation zone 20; Heating element

100; Pipe body 110; Heat dissipation fin

150; Sidewall 200; Inner tube

201; Screw groove 202; space

300; Wick

Claims (4)

Hollow pipe bodies; A hollow inner tube provided at an inside of the pipe main body while both ends are opened so that an inner space communicates with the outside; Sidewalls formed at both ends of the pipe body to seal a space between the pipe body and the inner tube; A working fluid injected into the space; And And a wick formed on the inner side of the pipe body to move the working fluid from one side of the pipe body to the other side by a capillary phenomenon. The method according to claim 1, And a heat dissipation fin formed on the outer circumferential surface of the pipe body along the longitudinal direction of the pipe body. The method according to claim 2, The wick is formed in a groove (groove) shape on the inner side of the pipe body, The heat pipe of the double pipe structure, characterized in that the heat dissipation fin and the wick is formed integrally with the pipe body in the process of forming the pipe body by extrusion molding. The method according to any one of claims 1 to 3, The heat pipe of the double pipe structure, characterized in that the threaded groove which can be detachably screwed to the heating element is formed on the inner peripheral surface of the open end of the inner tube.

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