KR200266648Y1 - A Fin-Tube Type Heat Exchanger - Google Patents

Abstract

The present invention relates to a fin tube type heat exchanger, and the tube of a constant diameter through which heat exchange is performed between the fluid contacting the inside and the outside, and the inner diameter of the tube is divided, a plurality of continuous formed in the axial direction from one end to the other end of the tube A first fin, a second fin formed at an outer diameter of the tube to increase a heat transfer area, and a plurality of micro fins continuously protruding at a predetermined height on a surface of the first fin and a second fin continuously formed helically along an axial direction. It is characterized by comprising.

Description

Fin Tube Type Heat Exchanger {A Fin-Tube Type Heat Exchanger}

The present invention relates to a heat exchanger, and more particularly, the fins are formed separately on the inside and outside of a tube of constant diameter, each formed fin to provide a similar environment for the fluid flowing inside and outside the tube The present invention relates to a fin tube type heat exchanger having a spiral shape having a predetermined twist angle and having fine micro fins formed on a surface of a fin formed therein, thereby improving heat exchange performance.

Recently, efforts to develop high efficiency heat exchangers for efficient use of energy have been made to reduce serious waste of energy.

At this time, the most commonly used heat exchange mechanism is an air conditioner such as a refrigerator and an air conditioner. In order to increase the heat exchange performance of the heat exchange mechanism, the heat transfer performance of the condenser and the evaporator mounted therein should be considered.

Normally, the entire cycle of an air conditioner or a freezer is a gaseous refrigerant is introduced into the compressor and compressed, the compressed hot refrigerant is supplied to the condenser.

The compressed refrigerant releases heat from the condenser to the atmosphere, and the internal pressure drops through the nozzle in a pressure drop in the state of a sub-cooled liquid.

The refrigerant supplied to the evaporator then absorbs heat from the surroundings and evaporates and returns to the compressor.

As described above, the heat exchange performance of the condenser or the evaporator is the most important in the entire cycle of the heat exchanger such as the air conditioner or the refrigerator, and a fin core type heat exchanger is conventionally used to improve the heat exchange performance.

As shown in FIG. 1, the fin core type heat exchanger 5 is formed by laminating a copper thin plate having a thickness of about 0.1 mm to about 0.12 mm as a fin 3 to a core 1 made of a copper material. , It is done.

Since the conventional fin core type heat exchanger 5 is formed by fitting a plurality of fins 3 to a plurality of cores 1, heat transfer due to incomplete contact of the fins 3 with the core 1 is caused. There is a problem that the contact resistance occurs.

In addition, in particular, since the pressure drop is relatively large when the air passes through the heat exchanger 5, there is a problem that the performance of the entire heat exchange mechanism is lowered while the blowing ability of the blower for blowing air hits a limit.

In addition, since the thickness of the fin 3 is relatively thin, there is a problem that the thermal volume ratio is lowered and the fin efficiency is lowered.

Accordingly, the present invention is conceived in view of the conventional problems as described above, the first object of the present invention provides a fin tube type heat exchanger in the form of fins inside and outside the tube to express more improved heat exchange performance. It is.

In addition, the second object of the present invention is the first pin and the first spiral formed on the inner and outer sides of the tube so as to provide the same flow environment to the fluid flowing in and out of the tube to create an improved heat exchange performance, respectively It is to provide a fin tube-type heat exchanger that forms two fins, fine micro fins are formed on the surface of the first fin to improve the heat transfer performance during the condensation and evaporation of the fluid.

The purpose of the present invention is a heat exchanger,

A tube 10 having a constant diameter in which heat exchange is performed between the inner and outer fluids;

A plurality of first pins 20 which divide the inner diameter of the tube 10 and are continuously formed axially from one end to the other end of the tube 10;

A second fin (30) formed at an outer diameter of the tube (10) to increase a heat transfer area and continuously formed spirally along an axial direction; And

It is achieved by a fin tube-type heat exchanger comprising a plurality of micro fins 21 continuously protruding at a predetermined height on the surface of the first fin 20.

Here, the first pin is preferably formed parallel to the axial direction while dividing the inner diameter of the tube at a predetermined angle.

The first pin is preferably formed to have a predetermined twist angle with respect to the axial direction of the tube.

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 block diagram of a conventional fin core heat exchanger,

2 is a partial cutaway perspective view of a finned tube heat exchanger according to a first embodiment of the present invention;

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view taken along the line B-B of FIG.

Figure 5 is a partial cutaway perspective view of a fin tube type heat exchanger according to a second embodiment of the present invention,

6 is a state diagram used in the fin tube type heat exchanger according to the present invention.

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

1: core 3: pin

5: fin core type heat exchanger 10: tube

20: first pin 21: micro pin

30: second fin 100: fin tube heat exchanger

Next, the fin tube type heat exchanger according to the present invention will be described with reference to the accompanying drawings.

2 is a partial cutaway perspective view of a fin tube type heat exchanger according to a first embodiment of the present invention, FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 1, and FIG. 4 is a cross-sectional view taken along the line B-B of FIG.

As shown in Figures 2, 3 and 4, the fin tube type heat exchanger 100 is a constant heat exchange with the fluid in contact with the inside and outside so that the heat transfer performance can be improved when mounted to the condenser or evaporator of the air conditioner or freezer A tube 10 having a diameter and a plurality of first pins 20 and second pins 30 formed of different or the same material with respect to the tube 10, respectively, which are continuously formed inside and outside the tube 10, respectively. It is done by.

In the heat exchanger 100, the tube 10 is made of copper having a relatively high thermal conductivity, and the first fin 20 and the second fin 30 are formed inside and outside, respectively.

At this time, the outer diameter of the tube 10 can be selectively used depending on the device mounted within about 6.35mm ~ 25.4mm, when used in the air-cooled freezer is preferably about 15.8mm.

Each of the first pins 20 has a shape of five long rectangular plates having the same size, and each edge is symmetrically formed about one axis, and formed parallel to the inner side of the tube 10 in the axial direction. Thus, the inner diameter of the tube 10 is divided into five equal portions at 72 ° and continuously formed from one end to the other end of the tube 10.

At this time, the first fin 20 is preferably in the form of a plate of relatively thick copper or aluminum so that the heat capacity can be further improved, and is formed by a drawing process together with the tube 10.

By the way, the surface of each of the first fin 20, the micro fin 21 is continuously protruded to be parallel to the axial direction at a height of about 0.3mm ~ 1mm, the heat exchanger 100 is an air-cooled refrigerator When mounted and used, the formation height is preferably about 0.5 mm.

The material of the micro pin 21 is the same as each of the first pin 20, and is formed by being pulled integrally with the first pin 20.

Accordingly, since each of the first pins 20 formed together with the micro pins 21 may have more contact area with respect to the fluid flowing into the inner side of the tube 10, the phase change of the fluid ( In case of phase change, that is, condensation or evaporation may occur, the heat transfer efficiency may be further improved.

In addition, the second fin 30 is formed to be spirally continuous on the outer surface of the tube 10, and is formed by rolling to eliminate contact resistance due to incomplete contact.

At this time, the height of the second fin 30 can be selected within the range of 1mm to 15mm depending on the device on which the heat exchanger 100 is mounted, and when applied to an air-cooled refrigerator, the height of the second fin 30 is preferably about 12mm.

In addition, the material of the second pin 30 may be used in the form of a thick plate copper or aluminum in consideration of the thermal capacity and the thermal conductivity.

5 is a partially cutaway perspective view of a fin tube type heat exchanger according to a second embodiment of the present invention.

5, as shown, the outer surface of the tube 10 is formed with a continuous spiral second pin 30 in the axial direction, the inside of the tube 10 is also a plurality of symmetrical with each other along the axial direction The first pin 20 is formed continuously.

Here, each of the first fins 20 is constructed to draw a stable spiral in the axial direction with respect to the inner wall of the tube 10 at a torsion angle within about 45 °, 0.3 on the surface to further improve the heat transfer performance The micro pin 21 protrudes continuously with the height of mm-1 mm.

In this case, when the heat exchanger 100 is used as a condenser or an evaporator, the torsion angle of the first fin 20 is preferably about 20 °, and may be applied to the heat exchanger 100 for cooling lubricating oil having high viscosity. In this case, about 45 ° is preferable.

Therefore, since the fluid inside the tube 10 flows while contacting the surface of the second fin 30 having a predetermined torsion angle, the first fin 20 is compared with the case where the fluid flows in parallel to the axial direction. The heat exchange rate for can be further improved,

6 is a state diagram used in the fin tube type heat exchanger according to the present invention.

As shown in FIG. 6, a plurality of heat exchangers 100 are installed adjacent to each other to function as a condenser (or evaporator) used in a refrigerator or the like.

In this case, the second fins 30 in each of the heat exchangers 100 may be integrally coupled to each tube 10 to prevent deterioration of heat exchange performance due to non-contact.

In addition, since each of the second fins 30 formed on the surface of each tube 10 may be manufactured in a spiral shape and may be discharged while continuously conducting heat along the surface, each heat exchanger 100 may be separately installed to be adjacent to each other. Although forming a condenser, as the performance of the individual heat exchangers 100 are added together, the overall heat exchange performance is increased, and thus the heat transfer coefficient may be improved by about 100% to 800% compared to the conventional.

In the heat exchanger according to the present invention as described above, the number of the first fins 20 may be arbitrarily selected from three or more, including five.

According to the fin tube type heat exchanger as described above, since the fins are formed separately inside and outside the tube, the heat transfer coefficient is increased by 100% to 800%, and thus the heat transfer performance is significantly improved compared to the conventional fin core type. .

In addition, the first fin, which is formed to have a constant twist angle at the inside of the tube, thermally corresponds to the second fin which is formed spirally, thereby providing a similar flow environment to the fluid contacting the inside and the outside, thereby providing substantially the same heat transfer coefficient. There is an effect that can be created.

Therefore, it can be utilized as a high-performance condenser or evaporator, the effect is that the application range is wider.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the present invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the present invention.

Claims (3)

In the heat exchanger, A tube 10 having a constant diameter in which heat exchange is performed between the fluid in contact with the inside and the outside; A plurality of first pins 20 which divide the inner diameter of the tube 10 and are continuously formed axially from one end to the other end of the tube 10; A second fin (30) formed at an outer diameter of the tube (10) to increase a heat transfer area and continuously formed spirally along an axial direction; And And a plurality of micro fins 21 continuously protruding at a predetermined height on the surface of the first fin 20. The method of claim 1, The first fin 20 is a fin tube type heat exchanger, characterized in that formed in parallel to the axial direction while dividing the inner diameter of the tube (10) at a predetermined angle. The method of claim 1, The first fin (20) fin tube heat exchanger, characterized in that formed to have a predetermined twist angle with respect to the axial direction of the tube (10).