KR100197686B1 - Heat exchanger for air conditioner - Google Patents

Abstract

The heat exchanger of the air conditioner according to the present invention includes a plurality of flat fins arranged in parallel at regular intervals such that air flows therebetween, and a plurality of heat transfer tubes inserted at right angles to the plurality of flat fins so that fluid flows therein; And a heat exchanger of an air conditioner having a plurality of first to fifth louver type cutout portions provided between upper and lower sides of the plurality of heat transfer tubes with respect to the plate fins. The front and rear ends of the plate pins are projected diagonally so as to be opened toward the back side air flow direction and the surface side air flow direction opposite direction of the plate pin, and are arranged so as to be connected in a direct manner without a base part between their transverse sides and vertically up and down. And a stepped shape so as to have a different height difference with a base portion between the heat pipe and the first and second Since the longitudinal centers of the louver-shaped section and the fourth and fifth louver-shaped sections are divided into two parts so as to have upper and lower seasons each with a predetermined base, the flowing air stream can be turbulent and mixed. In addition, it is possible to increase the heat transfer effect and at the same time effectively reduce the exponential region generated behind the heat transfer pipe 2, and to allow the heat transfer from the heat transfer pipe 2 to be smoothly carried out without blocking the flow of heat. It is possible to improve heat transfer in the center between the plurality of heat transfer tubes 2.

Description

Heat exchanger of air conditioner

1 is a perspective view showing a conventional heat exchanger.

FIG. 2 is an enlarged view of the thermal fluid characteristics around the plate fins in FIG.

FIG. 3 is an enlarged view showing the thermal fluid characteristics of the heat pipe caution in FIG.

4 is a plan view showing a plate fin of another conventional heat exchanger.

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

6 is a plan view showing a flat fin of the heat exchanger according to the present invention.

7 is a cross-sectional view taken along line B-B in FIG.

* Explanation of symbols for main parts of the drawings

1: flat fin 2: heat pipe

10: louver season group

20,30,40,50,60: first to fifth louver type seasons

21,31,51,61: Upper season 22,32,52,62: Lower season

70: Foundation

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger of an air conditioner, and in particular, a plurality of louver-type season groups are installed directly between a plurality of heat pipes in a flat fin and flow through them. , Air) is turbulent and mixed to improve heat exchange performance and at the same time to reduce the exponential region (for example, the quadruple region) behind the plurality of heat pipes.

As shown in FIG. 1, the heat exchanger of the conventional air conditioner is a plurality of flat fins 1 arranged in parallel at regular intervals, and the flat fins 1 are orthogonal to the flat fins 1 and are similarly crossed. It consists of the heat exchanger tubes 2 arrange | positioned in the arranged shape, and airflow flows in the direction of the arrow which shows between the said some flat plate fins 1, and heat-exchanges with the fluid in the heat exchanger tube 2. As shown in FIG.

And, as shown in FIG. 2, the thermofluid characteristics around the flat fin 1 are proportional to the thickness of the temperature boundary layer 3 on the heat transfer surface of the flat fin 1 in proportion to the square root of the distance from the inlet of the airflow. Because of the thickening, the airflow-side heat transfer rate decreases significantly with increasing distance from the inflow portion of the airflow, and has a drawback of low heat transfer performance as a heat exchanger.

In addition, as shown in FIG. 3, the heat fluid characteristics around the heat transfer tube 2 are 70 ° C from an obstructed point on the surface of the heat transfer tube 2 when the low wind speed air flows in the direction of the arrow in the heat transfer tube 2. Since the flow is peeled off at 80 ° C. and the exponential region 4 is indicated by the diagonal line at the rear part of the heat transfer tube 2, the heat flow rate at the air flow side in this exponential region 4 is remarkably lowered, so that the heat transfer performance as the heat exchanger is improved. Low had the drawback.

Thus, a heat exchanger of another conventional air conditioner includes a plurality of louvers by a direct method without a base portion at upper and lower intervals of the plurality of heat pipes 2 with respect to the plurality of flat fins 1, as shown in FIG. It has been proposed to bend the mold cutting sections 5a, 5b, 5c, 5d, and 5e.

That is, the louver type cutouts 5a, 5b, 5c, 5d, and 5e are cut by the back surface and the surface side of the flat plate pin 1 at the same inclination angle as shown in FIG. Protrudingly provided, the upper and lower ends of these louver type cutting parts 5a, 5b, 5c, 5d and 5e have been provided in parallel with respect to the circumferential surface of the seasoning group 2 above.

However, according to the conventional heat exchanger configured as described above, in the plate fin 1, a plurality of louver type cutouts 5a are provided on the plate fin 1 so as to reduce the thickness of the boundary layer, in particular, by turbulence of the heat exchange fluid. (5b) (5c) (5d) (5e), but the louver-shaped cutouts (5a) (5b) (5c) (5d) (5e) have upper and lower ends of the heat pipe (2). Since it is installed parallel to the circumferential surface and is arranged in a rectangular shape as a whole, an exponential region in which air flow does not flow is generated in the rear of the heat transfer pipe 2, and the air flow flowing between the plurality of flat fins 1 The problem arises that the heat transfer effect due to the mixing of the airflow cannot be expected due to the parallel flow without mixing.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to improve the heat transfer effect by improving the heat transfer effect by turbulent and mixing the air flow flowing between the plurality of flat plate pins and at the same time a plurality of It is possible to effectively reduce the exponential region occurring behind the two heat pipes, and to improve the heat transfer between the heat pipes and at the same time without interrupting the flow of heat from the heat pipes. It is to provide a heat exchanger of the air conditioner.

The heat exchanger of the air conditioner according to the present invention made to achieve the above object, a plurality of flat fins arranged in parallel at regular intervals so that the air flow flows therebetween, and perpendicular to the plurality of flat fins so that the fluid flows therein A heat exchanger of an air conditioner, comprising: a plurality of heat transfer tubes inserted into each other, and a plurality of first to fifth louver type cuts disposed between upper and lower sides of the plurality of heat transfer tubes with respect to the plate fins. The louver-shaped sections project in an oblique direction such that their front and rear ends are opened in the opposite direction to the backside airflow direction and the surfaceside airflow direction of the flat plate, and are continuously connected in a direct manner without a base between them. Are arranged so as to have a different height difference based on the base between the longitudinal upper and lower ends and the heat pipe. It is arranged in a step shape so that the longitudinal center of the first and second louver-shaped section and the fourth and fifth louver-shaped season is divided into two parts so as to have an upper season and a lower season, respectively, with a predetermined base. do.

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

In the drawings, the same components as those in the related art are denoted by the same name and the same reference numerals, and detailed description thereof will be omitted.

In the drawing, reference numeral 10 denotes that the flow of airflow flowing to the back and the surface of the plurality of flat fins 1 is turbulent and mixed, thereby reducing the exponential region occurring behind the plurality of heat pipes 2 and the overall heat transfer. In order to improve the performance, a plurality of louver-type season groups are installed in a stepped manner surrounding the upper and lower circumferential surfaces of the heat transfer tubes 2 while being opened in the flow direction of the air flow to the flat fins 1 with respect to the top and bottom sides of the heat transfer tubes 2. It is shown.

That is, the louver type season group 10, as shown in Figs. 6 and 7, a plurality of flat fins 1 are arranged in parallel at regular intervals such that the air flow flows therebetween, and the fluid inside The plurality of heat transfer tubes 2 are arranged to be inserted perpendicularly to the plurality of flat plate fins 1 in a vertical zigzag direction, and the airflow flowing to the rear surface and the surface of the flat plate fins 1 includes the plurality of heat transfer tubes ( 2) a first louver type seasoning section 20 installed in an oblique direction so as to protrude to the rear surface and the surface of the flat fin 1 with respect to the front upper and lower sides of the heat transfer pipe 2 so as to flow turbulent and mixed between the front and the front; The flat fin (1) with respect to the front upper and lower sides of the heat transfer tube (2) so that the mixed air flow diffused by the first louver-type seasoning section (20) passes through the front between the plurality of heat transfer tubes (2) again turbulent and mixed Diagonally installed to protrude from the back and surface of the The heat exchanger tube 2 so that the mixed airflow diffused by the two-louver cutout portion 30 and the second louver-shaped cutout portion 30 passes through the center between the plurality of heat transfer tubes 2 and is further turbulent and mixed. The third louver-shaped cutout portion 40 installed in an oblique direction to protrude to the back surface and the surface of the flat plate pin 1 with respect to the center upper and lower sides of the, and the mixed air flow diffused by the third louver-shaped cutout portion 40 Fourth louver-shaped section installed obliquely to protrude to the rear surface and the surface of the flat fin 1 with respect to the upper and lower rear side of the heat transfer pipe 2 so as to turbulent and mixed again when passing between the plurality of heat transfer tubes (2) (50) and the rear side up and down of the heat transfer pipe (2) so that the mixed airflow diffused by the fourth louver-shaped cutout portion (50) passes through the plurality of heat transfer pipes (2) and is further turbulent and mixed again. Fifth louver cutout installed obliquely to protrude to the back and surface of the flat plate pin (1) It consists of a base (60).

At this time, the plurality of first to fifth louver-shaped cuts 20, 30, 40, 50 and 60 are in the same diagonal direction by cutting so as to protrude to the back surface and the surface of the flat plate pin 1. It is installed.

The plurality of first to fifth louver type cutting sections 20, 30, 40, 50, 60 have different bases 70 with respect to the circumferential surface of the plurality of heat transfer tubes 2, respectively. It is installed vertically with height.

The plurality of first and fifth louver-type seasoning sections 20 and 60 have the same height at the top and bottom, and have a constant base 70 at the longitudinal center thereof, respectively. It is provided so that it may be divided into 2 equal parts having 22 and 62, and have the same cross-sectional area.

The plurality of second and fourth louver type cutouts 30 and 50 have the same height at the upper and lower ends and have a constant base 70 at the longitudinal center thereof, respectively, and have upper cuts 31, 51 and lower cuts ( It is provided so that it may be divided into two equal parts having 32) and 52 and have the same cross-sectional area.

At this time, the width of the base portion 70 that divides the center of the first and fifth louver-type seasons 20 and 60 is the center of the second and fourth louver-type seasons 30 and 50. The waterfall of the base portion 70 to be divided is formed in a wide width.

Each of the plurality of first to fifth louver type cutouts 20, 30, 40, 50, and 60 may have a flat plate pin such that the front side corresponding to half of the first to fifth louver type cutouts 20, 30, 40, 50, 60 is opened in the airflow direction. It protrudes obliquely to the back side of 1), and it protrudes obliquely to the surface of the flat plate 1 so that the rear side corresponding to half with respect to the width | variety of the width may open in the direction opposite to the airflow direction.

The horizontal sides of the first to fifth louver type cutouts 20, 30, 40, 50 and 60 are installed in a direct manner by cutting without the bases.

The following describes the operation and effects of the present invention configured as described above.

When the airflow flows in the direction of the arrow S shown in FIG. 6, the flow airflow flows between the back surface and the surface side of the plurality of flat fins 1, and the front side, the top side, and the bottom side of the plurality of heat transfer tubes 2, respectively. A plurality of first to fifth louver type cutouts 20, 30, 40, 50 and 60, which are installed in the same diagonal direction on the back surface and the surface of the flat plate pin 1 with respect to the rear side, respectively, Continuously turbulent and mixed so that the flow of heat from the heat exchanger tube 2 is smoothly transmitted without being interrupted while being sequentially passed as shown by the dotted line arrow shown in the figure, thereby increasing the heat transfer performance, and an index region generated behind the heat transfer tube 2 By reducing to the minimum area to increase the heat transfer effect in the rear of the heat pipe (2).

That is, the first to fifth louver-type seasons 20, 30, 40, 50, 60 is a stepped structure arranged so that the upper and lower ends surround the upper and lower peripheral surfaces of the plurality of heat transfer tubes (2). Since the flow of the flow stream is not blocked, the turbulence and mixing is smoothly flowed along the circumferential surface of the heat transfer pipe 2 and transferred to the rear side of the heat transfer tube 2 to minimize the exponential area and to maximize the heat transfer effect. Given.

In addition, the longitudinal lengths of the first, second, fourth, and fifth louver type cutouts 20, 30, 40, 50, and 60 are divided into two parts each with a fixed base 70. Since the upper seasons 21, 31, 51 and 61 and the lower seasons 22, 32, 52 and 62 are constructed, the flow of air flows through the upper seasons 21, 31 and 51. When passing through the (61) and the lower seasons 22, 32, 52, 62, the pressure drop is significantly reduced to induce a more smooth air flow and improve the heat transfer performance.

As described above, the heat exchanger of the air conditioner according to the present invention has a structure in which a plurality of louver-type seasoning groups are cut and bent by the direct method so as to surround the upper and lower circumferential surfaces of the heat transfer tube, so that the airflow flows. Can reduce turbulence and mixing while reducing the pressure drop, increase the heat transfer effect, and effectively reduce the exponential area created at the rear of the heat pipe, and smoothly transmit the heat to the heat pipe without blocking the flow of heat. At the same time there is an effect to improve the heat transfer in the center between the plurality of heat pipes.

Claims (1)

A plurality of flat fins arranged in parallel at regular intervals such that air flows therebetween, a plurality of heat transfer tubes inserted at right angles to the plurality of flat fins so that fluid flows therein, and the plurality of heat transfer tubes with respect to the flat fins In a heat exchanger of an air conditioner having a plurality of first to fifth louver type cutouts provided between upper and lower sides, each of the first to fifth louver type cutouts has a front and rear end of each of the flat fins on the rear side of the flat plate fin. Projected diagonally so as to be opened in the direction of flow and surface side airflow opposite, and arranged so as to be connected in a direct manner without a base between their transverse sides, and having a base between the longitudinal upper and lower ends and the heat exchanger tube with each other. It is arranged in a step shape so as to have a different height difference, the first and second louver-type seasons and the fourth and fifth louver-type seasons Serocheuk heat exchanger of the air conditioner, characterized in that the central portion with a constant based on the division into two equal parts so that each of the upper and lower grinders season group.