KR100575278B1 - A tube for heat exchange with a capillary-type heat pipe - Google Patents

Abstract

The present invention relates to a heat transfer tube to which a tubular heat pipe is attached. More particularly, a tubular heat pipe in which a refrigerant is enclosed in a tubular tube having an inner diameter of 1 mm to 5 mm formed in a spiral or zigzag curve on an outer side of the pipe-shaped heat transfer tube portion. Is formed integrally by welding, so that heat conduction is carried out simultaneously by conduction of heat through the pipe wall and tubular heat pipe of the heat transfer tube part and heat transfer by latent heat of refrigerant encapsulated in the tubular heat pipe during heat exchange using the same. The present invention relates to a heat exchanger tube with a tubular heat pipe that can be improved.

Accordingly, the present invention provides a tubular heat pipe (3) in which a refrigerant (3b) is enclosed in a tubular pipe (3a) having an inner diameter of 1 mm to 5 mm, which is bent in a spiral or zigzag shape to the outside of the heat pipe part (2) having a conventional pipe shape. Is welded and formed integrally, and in another embodiment of the present invention, the capillary heat pipe 3 is seated on the outer surface of the heat pipe part 2 to which the tubular heat pipe 3 is welded and fixed. The insertion groove 2a is characterized in that it is formed concave.

Heat Exchanger, Heat Pipe, Customs, Refrigerant, Heat Pipe, Insert Groove, Spiral, Zigzag

Description

A tube for heat exchange with a capillary-type heat pipe}

1A to 1D are perspective views showing a heat pipe with a capillary heat pipe according to the present invention.

Figure 2a to 2d is a partial side cross-sectional view showing another embodiment of a heat pipe with a tubular heat pipe according to the present invention.

3A to 3C are explanatory diagrams showing a state of use of the present invention.

<Explanation of symbols for main parts of drawing>

1: heat pipe 2: heat pipe part

2a: Insertion groove 3: Tubular heat pipe

3a: Customs 3b: Refrigerant

The present invention relates to a heat transfer tube to which a tubular heat pipe is attached. More particularly, a tubular heat pipe in which a refrigerant is enclosed in a tubular tube having an inner diameter of 1 mm to 5 mm formed in a spiral or zigzag curve on an outer side of the pipe-shaped heat transfer tube portion. Is formed integrally by welding, so that heat conduction is carried out at the same time during heat exchange using the pipe wall of the heat transfer tube and the heat transfer by the latent heat of the refrigerant encapsulated in the tubular heat pipe. The present invention relates to a heat exchanger tube with a tubular heat pipe that can be greatly improved.

In general, heat pipes are used for heat exchange in heat exchangers, condensers, evaporators, or oil coolers such as air conditioners, refrigerators, and the like. Substantial heat exchange is achieved.

In order to improve the heat transfer efficiency of such a heat pipe, conventionally, surface coating or integral roughening is applied to the pipe wall of the heat pipe, or a coil wire and a twisted tape are inserted into the heat pipe to promote the internal flow of the heat pipe by turbulence. Although the method was used, due to the increase in processing cost and the treatment of pollutants, it has not been able to promote much consumption in industrial facilities.

In addition, conventionally, in order to increase the surface area on the fluid side with low thermal conductivity, a heat pipe having high performance aluminum heat fins formed in a wave shape on the outside of the heat pipe or where holes are drilled is used. Due to contact resistance and pin clogging due to fine dust during long-term use, heat transfer performance was significantly reduced.

In addition, conventionally, the heat transfer tube itself has a spiral tube type or a corrugated tube type heat transfer tube to maximize heat transfer efficiency, but there is a problem in that it does not exhibit excellent heat transfer performance compared to an increase in manufacturing cost.

The present invention has been made in order to solve the above problems, weld-fixed tubular heat pipe in which the refrigerant is sealed inside the tubular tube of 1mm ~ 5mm inner diameter formed bent in a spiral or zigzag form on the outer side of the pipe-shaped heat transfer tube. It is possible to significantly improve heat transfer efficiency by simultaneously conducting heat through the pipe wall and tubular heat pipe itself and heat transfer by the latent heat of refrigerant encapsulated in the tubular heat pipe during heat exchange using the same. It is a technical problem.

In order to solve the above technical problem, the present invention is a tubular heat pipe in which a refrigerant is encapsulated in a tubular tube having an inner diameter of 1 mm to 5 mm formed in a spiral or zigzag curve on the outside of a heat pipe portion having a conventional pipe shape. In another embodiment of the present invention is characterized in that the insertion groove in which the tubular heat pipe is seated on the outer surface of the heat transfer pipe portion to which the tubular heat pipe is welded and fixed.

Hereinafter, the configuration of the present invention for achieving the above object will be described in detail with reference to FIGS. 1A to 3C.

1a to 1d is a perspective view showing a heat pipe with a tubular heat pipe according to the present invention, Figures 2a to 2d is a partial side cross-sectional view showing another embodiment of the heat pipe with a tubular heat pipe according to the present invention. 3A to 3C are explanatory diagrams showing a state of use of the present invention.

The heat exchanger tube with a tubular heat pipe according to the present invention has a refrigerant 3b inside the tubular tube 3a which can be bent outside the pipe-shaped heat transfer tube unit 2 as shown in FIGS. 1A to 1D. The encapsulated tubular heat pipe 3 is configured to be welded and formed integrally.

In the configuration of the heat transfer tube 1 according to the present invention, the heat transfer tube portion 2 is formed in the same manner as a heat transfer tube made of copper or steel pipes commonly used in conventional air-cooled or water-cooled heat exchangers, heat pipe radiators, and the like. The tubular heat pipe 3 welded and fixed to the outside of the heat pipe part 2 has a certain amount of refrigerant 3b encapsulated inside a tubular pipe 3a made of a copper or steel pipe capable of bending in various shapes. It is configured to be.

In addition, the tubular heat pipe 3 is preferably made of a tubular pipe 3a having an inner diameter of 1 mm to 5 mm for smooth operation and ease of brazing as a bottom pipe, and thus, of the tubular heat pipe 3 The reason for limiting the inner diameter to 1 mm to 5 mm is that when the inner diameter of the tubular tube 3a is less than 1 mm, the inner diameter of the bent portion becomes extremely narrow when the tubular tube 3a is bent in a helical or zigzag shape, which causes clogging or heat in brazing. This is because problems such as easy melting and puncture are caused, and when the inner diameter of the capillary tube 3a exceeds 5 mm, a problem that the heat pipe is not smoothly operated by capillary forces occurs. .

Further, the tubular heat pipe 3 welded to the outside of the heat transfer pipe part 2 forms a circle or ellipse larger than the outer diameter of the heat transfer pipe part 2, as shown in FIGS. 1A and 1B. Spiral circumference surrounding the outer periphery), zig-zag shape traveling in the longitudinal direction of the heat pipe part 2 as shown in Fig. 1c, or zig-zag as shown in Fig. 1c as shown in Fig. 1d. Both sides of the tubular heat pipe 3 formed in the shape is formed in a shape such as bent to surround both sides of the heat transfer pipe portion (2).

The shape of the tubular heat pipe 3 as described above is a type of heat exchanger (water cooling or air cooling) to which the heat pipe 1 with the tubular heat pipe is attached, and the heat transfer mode of the heat pipe part 2, that is, the heat pipe part. It is alternatively selectable depending on whether (2) performs heating or cooling with respect to the fluid which flows out of the heat exchanger tube part 2, and the like.

For example, in the air-cooled heat exchanger 10 as shown in FIG. 3A, the tubular heat pipe 3 attached to the outside of the heat pipe part 2 may be in contact with the air with the largest surface area. It is preferable to apply a heat transfer tube with a tubular heat pipe 3 formed in a spiral shape as shown in FIG. 1B or a zigzag shape as shown in FIG. 1C on the outside of 2), as shown in FIG. 3B. In the shell & tube type water-cooled heat exchanger 11 as described above, the volume of the tubular heat pipe 3 attached to the outside of the heat pipe part 2 is minimized to limit the space inside the cell 12. A tubular shape formed in a spiral shape as shown in FIG. 1A or zigzag as shown in FIG. 1D on the outside of the heat pipe portion 2 so that as many heat pipes as possible can be mounted thereon. To apply the bit pipe 3 the Customs-type heat pipes 3 are attached to the heat transfer tubes on both sides by that bent to surround the heat transfer tubes on both sides of the room unit (2) the shape of the preferred.

Further, as another embodiment of the present invention, the tubular heat pipe 3 is welded, as shown in Figs. 2A to 2D, which show partial side cross-sectional views of the heat pipe according to the present invention shown in Figs. 1A to 1D, respectively. An insertion groove in which the tubular heat pipe 3 is concave is formed by forming a concave insertion groove 2a in which the tubular heat pipe 3 is seated on the outer surface of the heat transfer tube portion 2 to be fixed. By seating and welding in 2a), the contact area between the heat pipe part 2 and the tubular heat pipe 3 is further enlarged to increase the thermal conductivity, while the heat pipe part 2 and the tubular heat pipe 3 are further increased. It is possible to maintain a stable bonding state.

Referring to the use and working relationship of the heat transfer tube with a tubular heat pipe according to the present invention configured as described above are as follows.

The heat exchanger tube with a tubular heat pipe according to the present invention can be easily installed by replacing a conventional heat exchanger tube with a condenser and an evaporator or an oil cooler mounted on a heat exchanger or an air conditioner or a refrigerator attached to an industrial facility.

As an example, the heat exchanger tube according to the present invention includes an air-cooled heat exchanger 10 as shown in FIG. 3A or a shell & tube type water-cooled heat exchanger 11 as shown in FIG. 3B, and As illustrated in FIG. 3C, the heat pipe type radiator 13 is easily radiated using latent heat of the refrigerant 16 enclosed in the main body 14 in which the hot water pipe or the electric heater 15 is built. Can be applied.

As described above, the heat pipe with the tubular heat pipe according to the present invention, which can be mounted and used in various heat exchanger devices, has a tubular heat pipe 3 installed on the surface of the heat pipe part 2 and the surface of the heat pipe part 2 during heat exchange. At the same time, heat exchange takes place.

That is, in the heat exchange by the heat transfer tube with the tubular heat pipe of the present invention, the heat exchange by the heat transfer tube part 2 is similar to that of the heat transfer tube part 2 and the fluid that passes through the inside of the heat transfer tube part 2. Between the fluid (air or water) passing through the outside is made by the heat conduction action that takes place through the pipe wall of the heat transfer pipe portion 2, the tubular heat pipe (3) installed on the outside of the heat transfer pipe portion (2). The heat exchange by the heat exchange is performed by the heat transfer action by the latent heat of the refrigerant (3b) enclosed in the tubular (3a) of the tubular heat pipe (3).

Here, the heat transfer action by the latent heat of the refrigerant (3b) enclosed in the tubular (3a) of the tubular heat pipe (3) is the heat conduction from the high-temperature fluid passing through the inside of the heat transfer pipe portion (2) The heat transferred to the tubular heat pipe (3) through the contact with the tubular heat pipe (3) welded to the outside of the (2), the heat transferred to the tubular heat pipe (3) is the tubular heat pipe (3) Some of the refrigerant 3b remaining in the contact portion among the refrigerant 3b enclosed in the customs 3a of the vaporized gas is vaporized, and the vaporized refrigerant 3b is contacted through the tubular tube 3a which is bent in a spiral or zigzag shape. The vaporized refrigerant 3b, which is moved from the site to both sides of the tubular heat pipe 3, and moved to both sides of the tubular heat pipe 3, flows out of the tubular heat pipe 3 to the fluid (air or Condenses and liquefies while transferring heat to the water). Capillary force causing inclination or capillary phenomenon due to the shape of the spiral or zigzag curved tubular heat pipe 3 and the refrigerant 3b continuously evaporating at the contact point in the tubular heat pipe 3 By the pressure formed, the tubular heat pipe 3 and the heat transfer pipe part 2 are returned to the contact point.

Then, the heat transfer action by the latent heat of the refrigerant (3b) enclosed in the tubular (3a) of the tubular heat pipe (3) made through this process is the tubular (3a) of the tubular heat pipe (3) The refrigerant 3b encapsulated therein is helical or zigzag-shaped, and the tubular heat pipe 3 is formed by the shape of the tubular heat pipe 3 so as to circulate in the helical or zigzag form inside the tubular tube 3a while repeatedly evaporating and condensing tubular The heat pipe 3 can be made to be continuously and uniformly throughout.

Therefore, the heat exchanger tube with the tubular heat pipe according to the present invention exchanges heat between a high or low temperature fluid passing through the inside of the heat transfer tube portion 2 and a fluid (air or water) passing through the outside of the heat transfer tube portion 2. In the latent heat of the refrigerant 3b encapsulated in the tubular heat pipe 3 which is bent in a spiral or zigzag shape, which is installed outside the heat transfer tube part 2 together with the heat conduction action through the pipe wall of the heat transfer tube part 2, By the heat transport action is made at the same time will be able to significantly improve the heat transfer efficiency.

In addition, the heat transfer tube with a tubular heat pipe according to the present invention is the tubular heat pipe (3) itself bent in a spiral or zigzag shape provided on the outside of the heat pipe portion (2) itself as a pipe wall of the heat pipe portion (2). It also serves as a heat transfer fin that directly conducts the transferred heat, thereby further improving the heat transfer efficiency of the heat transfer tube.

As described above, the heat pipe with the tubular heat pipe according to the present invention weld-fixes the tubular heat pipe in which the refrigerant is enclosed in the tubular tube having an inner diameter of 1 mm to 5 mm formed in a spiral or zigzag curve outside the pipe tube. In this case, the heat conduction and heat transfer by the latent heat of the refrigerant encapsulated in the capillary heat pipe are simultaneously performed during heat exchange using the same, thereby significantly improving the heat transfer efficiency.

In addition, the present invention also serves to further improve the heat transfer efficiency by acting as a heat transfer fin directly conducts the heat transferred to the tube wall of the heat pipe tube, the tubular heat pipe is bent in a spiral or zigzag shape provided on the outside of the heat pipe portion. The effect is to be able to.

Claims (2)

A tubular heat pipe (3) in which a refrigerant (3b) is encapsulated inside a tubular pipe (3a) having an inner diameter of 1 mm to 5 mm, which is bent in a spiral or zigzag form, is welded and fixed to the outside of the heat pipe part (2) having a general pipe shape. Heat transfer tube with a tubular heat pipe, characterized in that formed integrally. The method according to claim 1, characterized in that the insertion groove (2a) in which the tubular heat pipe (3) is seated on the outer surface of the heat pipe portion (2) to which the tubular heat pipe (3) is welded and fixed. Heat pipe with capillary heat pipe.

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