KR20040042945A - Heat exchanger with heat transfer plate using latent heat of working fluid - Google Patents

Abstract

PURPOSE: A heat exchanger having an electric heat plate using latent heat of a working fluid is provided to reduce the size of a heat exchanger by increasing the heat exchange capability. CONSTITUTION: An electric heat pipe(31) is formed of a thermal conductive member, having a passage for a fluid inside. A plurality of electric heat plates(33) include hermetic containers and a working fluid. Each hermetic container has a one side contacting with the electric heat pipe to exchange heat, and the other side arranged to be extended in a horizontal direction to a length direction of the electric heat pipe. The working fluid is contained in the hermetic containers to be changed in phase. The plurality of electric heat plates are arranged at certain pitches in association with the length direction of the electric heat pipe for accelerating heat exchange of the electric heat pipe.

Description

Heat exchanger with heat transfer plate utilizing latent heat of working fluid {HEAT EXCHANGER WITH HEAT TRANSFER PLATE USING LATENT HEAT OF WORKING FLUID}

The present invention relates to a heat exchanger having a heat transfer plate utilizing latent heat of a working fluid, and more particularly, a working fluid that can be reduced in size and made compact by increasing heat exchange capacity by using latent heat of a working fluid. It relates to a heat exchanger having a heat transfer plate using a latent heat of.

The freezer serves as a heat pump that moves the heat from the hot side to the low temperature with a device that performs mechanical work to reduce the temperature of the enclosed space below the ambient temperature or performs a freezing action that absorbs heat. At this time, the operating fluid that carries heat is called a refrigerant.

BACKGROUND ART Refrigerators that are widely used in refrigerators, air conditioners, and the like are steam compression freezers, and these steam compressors include a compressor, a condenser, an evaporator, and an expansion device.

1 is a general configuration of a refrigeration cycle, Figure 2 is a view schematically showing the configuration of a conventional heat exchanger. As shown in these figures, the refrigeration cycle, the compressor 11 for compressing the refrigerant, and a condenser arranged in communication with the discharge side of the compressor 11 along the flow direction of the refrigerant condenser for condensing the compressed refrigerant through heat radiation ( 13), an expansion device 15 disposed on the outlet side of the condenser 13 and expanded while fluid is throttled, and an evaporator 17 in which the refrigerant expanded by the expansion device 15 absorbs latent heat of surroundings and evaporates. Equipped with. These are connected in communication with each other by the refrigerant pipe 19 so that the refrigerant can circulate, the condenser fan 21 and the evaporator to promote heat flow by increasing the flow of air on one side of the condenser 13 and the evaporator 17 Fans 23 are provided respectively.

On the other hand, heat exchangers such as the condenser 13 and the evaporator 17 form a flow path therein to allow the refrigerant to flow therein, and the heat transfer tubes 25 arranged in a zigzag shape and heat transfer around the heat transfer tubes 25 are provided. A plurality of heat transfer fins 27 which are in contact with each other and spaced apart from each other at a predetermined pitch along the longitudinal direction of the heat transfer tube 25 to increase the heat transfer area of the heat transfer tube 25 are provided.

However, in such a conventional heat exchanger, since a very small heat transfer coefficient is used as the cooling fluid, not only the length of the heat transfer tube 25 becomes long, but also the heat transfer tube 25 may be increased in order to increase the heat transfer area of the heat transfer tube 25. Since a plurality of heat transfer fins 27 are attached to the periphery, there is a problem that the size of the heat exchanger itself is increased and a lot of air is put into the work.

Accordingly, an object of the present invention is to provide a heat exchanger having a heat transfer plate using latent heat of the working fluid, which can be reduced in size and compact in size by increasing the heat exchange capacity by using latent heat of the working fluid.

1 is a general refrigeration cycle configuration diagram,

2 is a view schematically showing the configuration of a conventional heat exchanger,

3 is a perspective view of a heat exchanger having a heat transfer plate using latent heat of a working fluid according to an embodiment of the present invention;

4 is a longitudinal sectional view of FIG. 3;

5 is a perspective view of a heat exchanger having a heat transfer plate using latent heat of a working fluid according to another embodiment of the present invention;

6 is a longitudinal sectional view of FIG. 5;

7 is a perspective view of a heat exchanger having a heat transfer plate using latent heat of a working fluid according to another embodiment of the present invention;

8 is a front view of FIG. 7;

9 is a longitudinal cross-sectional view of FIG. 7;

10 is a cross-sectional view of the heat transfer plate of FIG.

11 is an enlarged perspective view of the heat transfer member of FIG. 7;

12 is a front view of a heat exchanger having a heat transfer plate using latent heat of a working fluid according to another embodiment of the present invention;

FIG. 13 is a longitudinal cross-sectional view of FIG. 12.

Explanation of symbols on the main parts of the drawings

31: heat transfer tube 33: heat transfer plate

34: airtight container 35: heat pipe contact portion

36: working fluid

The object is, according to the present invention, a heat transfer tube is formed in the flow path of the fluid inside the heat conductive member; It is formed to form a plate with a thermally conductive member, one side is in contact with the heat exchanger tube to be heat exchanged and the other side is arranged to extend horizontally in the longitudinal direction of the heat transfer tube, the working fluid that is accommodated in the interior of the sealed container and the phase change It is provided with a heat transfer plate using a latent heat of the working fluid characterized in that it is spaced apart at a predetermined pitch along the longitudinal direction of the heat transfer pipe to promote heat exchange of the heat transfer pipe by using the latent heat of the working fluid. Achieved by one heat exchanger.

Here, at least one of the heat transfer plates is preferably a heat pipe through which a working fluid inside the sealed container flows by capillary action.

In addition, it is effective that at least one of the heat transfer plates is a thermosiphon in which the working fluid inside the sealed container flows due to the density difference therein.

The heat transfer pipe is preferably formed so that the flow cross-sectional area is increased in the section in which the heat transfer plate is disposed.

The heat transfer pipe has a circular cross-sectional shape, and the heat transfer plate is effective in that the heat transfer tube contact portion recessed in an arc shape is formed to be in surface contact with the outer surface of the heat transfer tube.

One side may further include a heat transfer member that is heat-exchangeable to the outer surface of the heat transfer tube and the other side is heat-exchangeable contact the side of the heat transfer plate to increase the heat exchange area of the heat transfer tube and the heat transfer plate.

The heat transfer member is a pair of heat transfer tube contacting portions which are in contact with the circumferential surface of the heat transfer tube, and a pair of heat transfer tube bent from both sides of the heat transfer tube contact portion along the longitudinal direction of the heat transfer tube to be in contact with each other so as to exchange heat with each other. It is effective to configure the heat transfer plate contacts to be integrally formed with each other.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

3 is a perspective view of a heat exchanger having a heat transfer plate using latent heat of a working fluid according to an embodiment of the present invention, and FIG. 4 is a longitudinal sectional view of FIG. As shown in these figures, the heat exchanger 30 having a heat transfer plate utilizing latent heat of the working fluid includes a heat transfer tube 31 for forming a fluid flow path therein with a heat conductive member, and one side of the heat transfer tube 31. The heat exchanger is in contact with the heat exchanger and the other side extends horizontally in the longitudinal direction of the heat transfer tube 31 and includes a plurality of heat transfer plates 33 spaced apart from each other at a predetermined pitch (P) along the longitudinal direction of the heat transfer tube 31 Consists of.

Each heat transfer plate 33 forms a receiving space sealed therein by a heat conductive member, one side of which is in contact with the outer surface of the heat transfer tube 31 so as to be heat-exchangable, and the other side extends laterally in the longitudinal direction of the heat transfer tube 31. The sealed container 34 and the working fluid 36 accommodated in the sealed container 34 so that a phase change is possible are provided. The heat transfer tube contact portion 35 is formed at one side of the sealed container 34 to have an arc shape corresponding to the outer diameter surface of the heat transfer tube 31 so that the contact area with the heat transfer tube 31 may be increased.

Here, the heat transfer plate 33 is a two-phase sealed thermosiphon (Two) disposed so that the lower end of the sealed container 34 is in contact with the upper surface of the heat transfer pipe 31 so that the working fluid 36 can flow by the density difference therein. phases closed type thermoshphon).

By this configuration, as in the case of the condenser, when a high-temperature fluid flows inside the heat transfer tube 31, the working fluid 36 in the lower interior of the sealed container 34 absorbs latent heat from the heat transfer tube 31 to evaporate. do. The evaporated working fluid 36 flows upward to the inner upper region of the hermetic container 34, as shown by the dashed arrow in FIG. 4, and radiates and condenses in the upper region of the hermetic container 34. The condensed working fluid 36 flows downward to the lower region of the sealed container 34, as shown by the solid arrow in FIG. The working fluid 36 absorbs latent heat from the heat transfer tube 31, evaporates, and rapidly cools the heat transfer tube 31 while repeating the heat dissipation and condensation in the upper zero region of the sealed container 34.

5 is a perspective view of a heat exchanger having a heat transfer plate using latent heat of a working fluid according to another embodiment of the present invention, and FIG. 6 is a longitudinal sectional view of FIG. As shown in these figures, the heat exchanger 40 having a heat transfer plate utilizing latent heat of the working fluid has a heat exchanger tube 41 forming a fluid flow path therein, and an upper end heat exchanger on the outer surface of the heat transfer tube 41. The lower end is configured to include a plurality of heat transfer plate 43 which is spaced apart from each other at a predetermined pitch (P) along the lengthwise direction of the heat transfer tube 41 and possibly in contact with the lower end of the heat transfer tube 41. have.

Each heat transfer plate 43 is provided with a plate-shaped sealed container 44 for forming a receiving space sealed therein by a thermally conductive member, and a working fluid 46 accommodated in a changeable phase inside the sealed container 44. Doing. The heat transfer tube contact portion 45 is formed at one side of the sealed container 44 to have an arc shape corresponding to the outer diameter surface of the heat transfer tube 41 so that the contact area with the heat transfer tube 41 may be increased.

Here, each heat transfer plate 43 is a two-phase sealed thermosiphon in which the upper end of the sealed container 44 is in contact with the outer surface of the heat transfer pipe 41 so that the working fluid 46 flows due to the density difference therein. It consists of a form.

With this configuration, the working fluid 46 in the liquid phase is present in the lower region of the sealed container 44 of each heat transfer plate 43 due to the density difference therein, and the working fluid 46 in the gas phase is formed in the upper region. Will be located. At this time, when a low temperature fluid flows inside the heat transfer pipe 41, the gaseous working fluid 46 is dissipated and condensed, and the condensed working fluid 46 is a solid arrow of FIG. As shown, there is a downward flow. The working fluid 46 in the down-flow liquid absorbs the latent heat of surroundings and evaporates, and the evaporated working fluid 46 flows upward, as shown by the dotted arrows in FIG. 6.

7 is a perspective view of a heat exchanger having a heat transfer plate using latent heat of a working fluid according to another embodiment of the present invention, FIG. 8 is a front view of FIG. 7, FIG. 9 is a longitudinal sectional view of FIG. 7, and FIG. 10 is 7 is a cross-sectional view of the heat transfer plate of FIG. 7, and FIG. 11 is an enlarged perspective view of the heat transfer member of FIG. 7. As shown in these figures, the heat exchanger 50 having a heat transfer plate utilizing latent heat of the working fluid includes a heat transfer tube 51 for forming a fluid flow path therein, and one side of the heat exchanger heat exchanger on the outer surface of the heat transfer tube 51. It is possible to contact with the other side is provided with a plurality of heat transfer plate 53 which extends laterally in the longitudinal direction of the heat transfer tube 51 and spaced apart at a predetermined pitch P along the length direction of the heat transfer tube 51.

Here, the heat transfer pipe 51 is formed so that the flow cross-sectional area is increased compared to the surrounding refrigerant pipe 57 along the flow direction of the fluid.

Each heat transfer plate 53 includes a sealed container 54 for forming a receiving space sealed therein by a heat conductive member, a working fluid 56 accommodated in a changeable phase inside the sealed container 54, and a heat transfer pipe ( It consists of a heat pipe (Heat pipe) having a plurality of capillary tube (55b) formed on the inner wall of the sealed container 54 so that the working fluid 56 condensed by heat radiation from the 51) side can flow by capillary phenomenon have.

The lower end of each sealed container 54 is formed with a heat transfer tube contact portion 55a recessed in an arc shape corresponding to the outer diameter surface of the heat transfer tube 51 so that the contact area with the heat transfer tube 51 can be increased.

On the other hand, the heat transfer member 58 is disposed between each heat transfer plate 53 so that mutual heat exchange between the heat transfer tube 51 and the heat transfer plate 53 can be increased. Each heat transfer member 58 has a heat transfer tube contact portion 59a having an arc-shaped cross section so as to be in surface contact with the outer diameter surface of the heat transfer tube 51, and the amount of the heat transfer tube contact portion 59a along the longitudinal direction of the heat transfer tube 51. A pair of heat transfer plate contact portions 59b which are bent upward at each stage and are in surface contact with each heat transfer plate 53 arranged adjacent to each other are provided.

By this configuration, as in the evaporator, when a low-temperature fluid flows inside the heat pipe 51, the working fluid 56 accommodated in the lower part of the sealed container 54 of each heat transfer plate 53 is radiated and condensed. The condensed working fluid 56 flows upward along the capillary tube 55b as shown by the solid arrow in FIG. 10 and absorbs latent heat in the upper region of the sealed container 54 to evaporate. The evaporated working fluid 56 is repeated as shown by the dashed arrow in Fig. 10, the flow is downward and heat radiated in the lower region to condense. At this time, the heat transfer member 58 disposed between each heat transfer plate 53 increases the heat exchange area of the heat transfer plate 53 and the heat transfer tube 51 to promote heat exchange between them.

12 is a front view of a heat exchanger having a heat transfer plate using latent heat of a working fluid according to another embodiment of the present invention, and FIG. 13 is a longitudinal sectional view of FIG. As shown in these figures, the heat exchanger 60 having a heat transfer plate utilizing latent heat of the working fluid includes a heat transfer tube 61 forming a flow path of a fluid therein, and one side of the heat exchanger tube on an outer surface of the heat transfer tube 61. Possible contact and the other side is horizontally extended in the longitudinal direction of the heat transfer pipe 61 and spaced apart from each other by a predetermined pitch P along the length direction of the heat transfer pipe 61 to promote heat exchange of the heat transfer pipe 61. The heat transfer plate 63 is provided.

The heat transfer pipe 61 is extended to increase the flow cross-sectional area compared with the surrounding refrigerant pipe 67, and between the heat transfer plates 63, the heat transfer member 61 and the heat transfer tube 61 so as to increase the heat exchange between each other ( 68) is intervened.

Each heat transfer plate 63 has a sealed container 64 having a heat transfer tube contact portion 65a formed therein so as to form a receiving space sealed therein and to be in surface contact with a lower end of the heat transfer tube 61, and a sealed container 64. A plurality of working fluids 66 accommodated in the phase change) and a working fluid 66 on the inner wall of the sealed container 64 so as to flow to an end portion of the heat transfer pipe 61 by capillary action. The capillary tube 65b is provided.

Each heat transfer member 68 includes a heat transfer tube contact portion 69a having an arc-shaped cross section so as to be in surface contact with the outer surface of the heat transfer tube 61, and the amount of the heat transfer tube contact portion 69a along the longitudinal direction of the heat transfer tube 61. The heat transfer plate contact portion 69b is formed to be in surface contact with each side of the heat transfer plate 63 which is bent at each stage and disposed adjacent to each other.

By such a configuration, when the air is blown toward each heat plate 63 by a blower fan or the like not shown, and a high-temperature fluid flows into the heat pipe 61 as in the condenser, the inside of each sealed container 64 The working fluid 66 is radiated and condensed, and the condensed working fluid 66 flows to the upper region through a capillary tube 65b formed on the inner wall of each sealed container 64, as shown by the solid arrow of FIG. . The working fluid 66 in the liquid phase flowing to the upper region is evaporated by absorbing latent heat from the heat transfer pipe 61, and the working fluid 66 in the vaporized vapor phase flows downward, as shown by the dotted arrows in FIG. 13. . The working fluid 66 inside each heat transfer plate 63 is radiated and condensed in the lower region, and absorbs latent heat from the heat transfer tube 61 in the upper region and evaporates, thereby flowing the inside of the heat transfer tube 61. The fluid will dissipate. On the other hand, the heat transfer member 68 between each heat transfer plate 63 to promote heat exchange by allowing the heat of the heat transfer tube 61 to be transferred to the sealed container 64 of each heat transfer plate 63.

In the embodiment described above with reference to FIGS. 3 to 6, the case where the flow cross-sections of the heat transfer tubes are the same will be described. In the embodiment described above with reference to FIGS. 7 to 13, the flow cross-sectional area of the heat transfer tubes is determined by Although the case is configured to expand compared to the flow cross-sectional area has been described with an example, the flow cross-sectional area of the heat transfer pipe in the embodiment related to Figures 3 to 6 is configured to increase the flow cross-sectional area of the heat transfer pipe and also in the embodiments related to Figures 7 to 13 Of course, the configuration can be the same.

3 to 6, the heat transfer member may be disposed between the heat transfer plates in the same manner as in the embodiment related to FIGS. 7 to 13.

In addition, in the embodiments related to FIGS. 3 to 6, the heat transfer plates are all composed of thermosiphons, and in the embodiments related to FIGS. 7 to 13, the heat transfer plates are all formed of heat pipes. Each heat transfer plate may be configured to be used simultaneously by appropriately selecting a thermosiphon and a heat pipe.

In addition, in the above-described and illustrated embodiments, the heat transfer plates are all disposed along the up and down direction with respect to the heat transfer tubes. For example, in the case of the heat siphon heat transfer plates, the working fluid therein can be flown due to the density difference. It can be configured to be inclined, and in the case of the heat transfer plate formed of a heat pipe, the working fluid is flowed by the capillary phenomenon, each heat transfer plate can be properly disposed in consideration of the relationship with the peripheral components.

As described above, according to the present invention, there is a heat transfer tube for forming a fluid flow path therein, and one side is in contact with the surface of the heat transfer tube to be heat-exchangeable and the other side extends horizontally in the longitudinal direction of the heat transfer tube to form a sealed space therein By providing a plurality of heat transfer plates which are accommodated in the sealed container and the inside of the sealed container and are spaced apart from each other along the longitudinal direction of the heat transfer pipe, thereby providing a plurality of heat transfer plates that promote heat exchange of the heat transfer pipe by using latent heat of the working fluid. A heat exchanger having a heat transfer plate utilizing latent heat of the working fluid, which can be increased in size and can be reduced in size and has a compact configuration, is provided.

Claims (7)

A heat transfer tube having a fluid flow path formed therein as a heat conductive member; It is formed to form a plate with a thermally conductive member, one side is in contact with the heat exchanger tube to be heat exchanged and the other side is arranged to extend horizontally in the longitudinal direction of the heat transfer tube, the working fluid that is accommodated in the interior of the sealed container and the phase change It is provided with a heat transfer plate using a latent heat of the working fluid characterized in that it is spaced apart at a predetermined pitch along the longitudinal direction of the heat transfer pipe to promote heat exchange of the heat transfer pipe by using the latent heat of the working fluid. One heat exchanger. The method of claim 1, At least one of the heat transfer plate is a heat exchanger having a heat transfer plate using the latent heat of the working fluid, characterized in that the working fluid inside the sealed container is a heat pipe flowing by the capillary phenomenon. The method of claim 1, At least one of the heat transfer plate is a heat exchanger having a heat transfer plate using the latent heat of the working fluid, characterized in that the working fluid in the interior of the sealed container flows by the density difference therein. The method of claim 1, The heat exchanger tube is a heat exchanger having a heat transfer plate using the latent heat of the working fluid, characterized in that the flow cross-sectional area is formed in the section in which the heat transfer plate is arranged. The method of claim 1, The heat exchanger tube has a circular cross-sectional shape, and the heat exchanger plate has a heat transfer tube using latent heat of the working fluid, characterized in that the heat transfer tube contact portion recessed in an arc shape so as to be in surface contact with the outer surface of the heat transfer tube. The method according to any one of claims 1 to 5, One side further includes a heat transfer member that is heat-exchangeable to the outer surface of the heat transfer tube and the other side is heat-exchangable contact the side of the heat transfer plate to increase the heat exchange area of the heat transfer tube and the heat transfer plate. A heat exchanger having a heat transfer plate to be used. The method of claim 6, The heat transfer member is a pair of heat transfer tube contacting portions which are in contact with the circumferential surface of the heat transfer tube, and a pair of heat transfer tube bent from both sides of the heat transfer tube contact portion along the longitudinal direction of the heat transfer tube to be in contact with each other so as to exchange heat with each other. A heat exchanger having a heat transfer plate using latent heat of the working fluid, characterized in that the heat transfer plate contact portion is formed integrally with each other.