KR20080021298A - A louver fin for a heat-exchanger - Google Patents

Abstract

A louver fin for a heat exchanger is provided to drain water forming on the opposite ends of the fin via a drain groove during heat exchange, and to prevent propagation of bacteria which generates bad smell. A louver fin(10) for a heat exchanger, which is made of a corrugated thin plate, is disposed between a plurality of tubes forming a passage for fluids circulating inside the heat exchanger to increase heat exchange area with outside air. A plurality of scaled louvers(12) are provided on each corrugated slope(11) of the fin, having a predetermined tilt angle. The louver comprises a groove cut provided on a upper side of the louver for moisture drainage generated during heat exchange, a projection provided on a lower side of the louver, at a corresponding position to the groove cut, a projecting part(15) provided on the center of outermost downstream of air flow in the slope, allowing the moisture drained along the slope of the fin to be drained to the left and right sides of the fin, and a drain groove for draining moisture from the groove cut to the projection.

Description

Louver fin for heat exchanger {A Louver Fin for a Heat-Exchanger}

1 is a louver fin for a conventional heat exchanger.

2 is another louver fin for a conventional heat exchanger.

Figure 3 is a perspective view showing a heat exchanger using a louver fin according to the present invention.

Figure 4 is a side view showing a louver according to the present invention.

5 is a plan view showing a louver according to the present invention.

Figure 6 is a side view and a plan view showing the air movement path of the heat exchanger is used louver fin according to the present invention.

Figure 7 is a perspective view showing various forms of the protrusion of the louver pin according to the present invention.

8 is a perspective view showing a louver pin of another embodiment of the present invention.

** Description of the symbols for the main parts of the drawings **

10: pin 11: slope

12: Louver 13: Incision

14: protrusion 15: protrusion

20: tube

According to the present invention, heat exchange efficiency is achieved by enlarging a heat exchange area of a tube interposed between tubes forming a circulating fluid flow path in a heat exchanger for exchanging internal circulating fluid and external air, such as an evaporator, a condenser or a radiator of an automobile air conditioner. It relates to a louver fin for a heat exchanger that raises the heat exchanger. In particular, the louvers having scales that allow air to flow through the inclined planes on each of the wavy surfaces have different inclination angles at two inclined planes facing each other. A louver fin for a heat exchanger.

As is well known, the heat exchanger is a device in which heat exchange fluid is introduced and the heat exchange fluid is transferred to a tube having a fin to cool or heat the tube to radiate or heat heat of the heat exchange fluid.

At this time, the fins are stacked up and down and are used as waveforms to smoothly drain the water from the top to the bottom. In addition, in order to maximize the heat exchange efficiency, air is flowed between the upper and lower layers of the fins to increase the heat exchange area.

A conventional louver fin for a vehicle heat exchanger is shown in FIG. 1. As shown in FIG. 1A, the tube 120 is formed between tubes forming a circulating fluid flow path in a heat exchanger for exchanging internal circulating fluid and external air, such as an evaporator or a condenser or a radiator of an automobile air conditioner. The louver fin 110 for a heat exchanger having a corrugated structure which increases the heat transfer area of the fluid and improves heat exchange efficiency between the two fluids is interposed. The louver fin 110 is in contact with the tube 120 through which the circulating fluid flows to exchange heat with the tube 120 and to exchange heat with the air contacting the surface of the louver fin 110, thereby reducing the heat exchange rate between the circulating fluid and the air in the tube 120. The higher the heat conductivity and the larger the specific surface area, the higher the heat exchange rate. Therefore, the louver fins 110 are usually made of a metal material having high thermal conductivity and easy to mold, such as aluminum, and in particular, as shown in FIG. It is manufactured with a thin plate structure of waveform that can maximize. In addition, as shown in FIGS. 1 (b) and 1 (c), each of the inclined surfaces 111 having a wave shape is partially cut and then the cut portion is bent at an angle with respect to the air flow direction. The louvers 113 of scale shape for inducing the air incident on the louver pin 110 to flow through the incision 112 and intersect the rain surface 111 are formed to be arranged at equal intervals along the air flow direction. do. The heat exchanger louver fin 110 having such a structure has an angle (??) of the louver 113 formed on each of the inclined surfaces 111, the density of the louver fin 110 to the heat exchanger volume, or The number of waveforms affects the heat exchange efficiency of the heat exchanger.

Such a conventional louver fin has a problem in that the water droplets generated in the evaporator core are not drained smoothly from the louver inside the fin, so that not only the heat dissipation performance of the evaporator core is deteriorated but also an odor may occur due to the condensed water droplets. I had. Therefore, various studies have been made among those skilled in the art in order to solve this problem. In Japanese Patent Laid-Open No. 2004-101074 (hereinafter referred to as Prior Art 1), the bent portion 114 is provided to the louver pin 110 interposed between the tubes 120 as shown in FIG. 2 (a). The water droplets were collected at the bent portion, and in Japanese Patent Laid-Open No. 2004-150710 (hereinafter referred to as Prior Art 2), the pitches P1 and P2 of the pins were lowered as shown in FIG. It is becoming more sparse. By the way, the prior art 1 is not only the shape of the bent portion is very complicated, as shown, in the process of pressing to form the bent to form a bent portion as the material of the plate is stretched, the pin material is a thin plate shape Since it is to be formed a bent portion of the form that deviates very much from the original form as shown, there was a problem that can be damaged in the material, such as tearing during the formation process to increase the defective rate of the product. On the other hand, the prior art 2 is not only a structure that helps condensation of water droplets, but also to make the pitch of the pins sparse as it goes down to the lower part, but also results in a reduction in the area of the fins compared to the conventional fins. There was a problem that can degrade the heat dissipation performance from the side.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a louver fin for the heat exchanger to smoothly drain the water generated in the louver during heat exchange with the outside air In providing.

In addition, another object of the present invention is to provide a louver fin for a heat exchanger that facilitates the drainage of moisture formed on the left and right ends of the fin.

The louver fin for the heat exchanger of the present invention for achieving the above object is interposed between a plurality of tubes forming a flow path of the inner circulating fluid of the heat exchanger in order to enlarge the heat exchange area with the external air, but the wave In the louver fin for the heat exchanger in which a plurality of louvers in the form of scales on each inclined surface forming a wave form an inclination angle, the upper end of the louver is provided with a cutting groove for draining water generated during heat exchange with the outside air The lower end of the louver is characterized in that a projection is provided at a position corresponding to the incision groove.

In addition, the cutting groove and the protrusion of the louver of the present invention is characterized in that each provided symmetrically on both sides.

In addition, the outermost side of the air flow downstream direction side of the inclined surface of the pin of the present invention is characterized in that the protrusion is further provided to drain the water drained along the inclined surface of the pin to the left and right of the pin.

In addition, the louver of the present invention is characterized in that it is further provided with a water drain groove for draining water from the incision groove to the projection.

Hereinafter, a louver fin for a heat exchanger according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

Figure 3 is a perspective view showing a heat exchanger using a louver fin according to the present invention, Figure 4 is a side view showing a louver according to the present invention, Figure 5 is a plan view showing a louver according to the present invention, Figure 6 is a present invention FIG. 7 is a view showing an air movement path of a heat exchanger using a louver fin, and FIG. 7 is a perspective view showing various forms of protrusions of the louver fin according to the present invention, and FIG. 8 is a view showing another type of louver fin of the present invention. Perspective view.

As shown, the louver fin for the heat exchanger according to the present invention is interposed between a plurality of tubes 20 forming a flow path of the internal circulating fluid of the heat exchanger in order to enlarge the heat exchange area with the external air.

The pin 10 is formed by press bending a plurality of louvers 12 in the shape of scales using a thin plate made of a flat plate to form a predetermined angle of inclination angle, and then bend to form a waveform. The corrugated fins 10 are formed on the inclined surface 11 in a state in which the plurality of louvers 12 have a predetermined angle of inclination angle. The fin 10 thus processed is interposed between the plurality of tubes 20.

The louvers 12 are formed in plural to form a predetermined angle of inclination angle on the fin 10 in order to enlarge the heat exchange area between the fin 10 and the external air. The louvers 12 are symmetrical so that one side and the other side are inclined in opposite directions with respect to the center of the same fin 10 along the air flow direction. In addition, when the fin 10 is unfolded, the inclined angles of the louvers 12 are formed in the opposite directions on the inclined surfaces so that the inclined angles of the louvers 12 face the same direction. It is formed to direct the flow direction. The reason for this is to increase the heat exchange efficiency by allowing the outside air to pass through the louver 12 without passing directly through the fin 10. FIG. 6 is a view illustrating an air movement path of a heat exchanger using a louver fin, in which the louver 12 is symmetrical so that one side and the other side of the louver 12 are opposite to each other in opposite directions with respect to the center along the air flow direction. Represents a state passing through the louver 12 without passing directly through the pin 10.

The upper end of the louver 12 is provided with a cutting groove 13 for draining the water generated during heat exchange with the outside air, the lower end of the louver 12 is a projection at a position corresponding to the cutting groove 13 ( 14) is provided. At this time, the cutting groove 13 and the protrusion 14 are provided symmetrically with respect to the center on both left and right sides of the louver 12, respectively. As described above, the present invention improves the problem that the water generated during heat exchange with the external air with the fin as in the prior art has a problem that the drainage is not smooth because the water is not smoothly drained by the incision groove 13 and the protrusion 14. The water is concentrated by the incision groove 13 and the protrusion 14 so that the water can be drained smoothly. As a result, it is possible to suppress the growth of bacteria such as molds caused by undrained water, and to prevent odors caused by such bacteria.

The cutting groove 13 and the protrusion 14 of the louver 12 may have various shapes such as a triangle, a quadrangle, and a circle as shown in FIG. 5.

The air around the fin 10 is blown from the back of the fin 10 to the front of the fin (see back of FIG. 4) (see the air flow direction of FIG. 3). As described above, the air around the fin 10 flows in one direction, and the air is discharged along the inclined surface 11 of the fin 10 at the outermost center of the air flow downstream of the inclined surface 11 of the fin 10. It is preferable to further include a protrusion 15 to allow the water to drain to the air flow downstream direction of the fin 10. When the fins 10 are installed in the heat exchanger, the protrusions 15 are provided on the air flow downstream direction side of the fins 10 as in the present invention, so that the moisture formed on the fins 10 is reduced. It is guided to the left and right, that is, toward the tube 20, whereby the water can be easily flowed down the tube 20 to facilitate the drainage of the water. At this time, the protrusion 15 may be in various forms such as hemispherical or polygonal pyramid as shown in FIG.

At this time, the louver 12 is preferably provided with a water drain groove 16 for draining the water from the cutting groove 13 to the protrusion 14 as shown in FIG. When the water drainage groove 16 is provided, the water concentrated in the cutting groove 13 is moved to the protrusion 14 to be formed, thereby facilitating water drainage.

As described above, according to the present invention, it is possible to smoothly drain the water generated during the heat exchange with the outside air from the fins, and by preventing the water from forming at both ends of the fins, the water is not drained as in the prior art. It is possible to suppress the propagation of bacteria, such as mold, to be generated, there is an effect that can prevent the smell by these bacteria.

Claims (4)

In order to enlarge the heat exchange area with the external air, it is interposed between the plurality of tubes 20 forming the flow path of the internal circulating fluid of the heat exchanger, and has a thin wave shape and has a scale shape on each inclined surface 11 forming a wave shape. In the louver fin for heat exchanger in which a plurality of louvers 12 are formed at a predetermined angle of inclination, The upper end of the louver 12 is provided with a cutting groove 13 for draining the water generated during heat exchange with the outside air, Louver fin for the heat exchanger, characterized in that the lower end of the louver (12) is provided with a projection (14) at a position corresponding to the cutting groove (13). The method of claim 1, The louver fin for the heat exchanger, characterized in that the cutting groove (13) and the projection (14) of the louver (12) are provided symmetrically on both sides. The method of claim 1, At the outermost side of the air flow downstream of the inclined surface 11 of the fin 10, a protrusion 15 for draining water drained along the inclined surface 11 of the fin 10 to the left and right of the fin 10. Louver fin for heat exchanger, characterized in that it is further provided. The method according to any one of claims 1 to 3, The louver 12 is a louver fin for heat exchanger, characterized in that the water drainage groove 16 is further provided to drain the water from the incision groove 13 to the projection 14.

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