KR101158225B1 - Louver fin and heat exchanger having the same - Google Patents

Abstract

PURPOSE: A louver fin and a heat exchanger having the same are provided to increase amount of heat transfer and reduce a drop of air pressure by forming a dimple on a corrugated part and a flat part with changing a manufactured mold. CONSTITUTION: A heat exchanger comprises a body(110), a plurality of louvers(120), dimples(130), a louver fin(100), and a tube. The body is formed into a thin plate and comprises a corrugated part and a flat part. The louver is formed on each inclined plane. The dimple is protruded toward an inner side of the body from the corrugated part and the flat part. The dimple has a width along a depth of the corrugated part or the flat part of the body. The louver fin comprises the inclined plane which is gradually branched to a direct path of gas passing through the body. The tube is connected along the corrugated part and the flat part of the louver fin.

Description

Louver fin and heat exchanger with same {Louver fin and heat exchanger having the same}

The present invention relates to a louver fan and a heat exchanger having the same, and more particularly, to a louver fan having a dimple formed at a portion where the louver is not formed in the louver fan and a heat exchanger having the same.

A heat exchanger is a device that transfers heat to another gas through a fin associated with a tube as fluid moves through the tube. Is a component to obtain a plurality of effects such as increasing the heat exchange area per unit volume to increase the heat transfer amount, reduce the weight, save the material. Even if the same area is used, a plurality of louvers in which the fin is cut in a direction perpendicular to the air flow can be exposed to the air flow, thereby achieving a multiplier heat transfer effect. The louver in which the louver is formed is called a louver fin, and a heat exchanger using the louver fin is called a louver fin heat exchanger.

1 is a view showing a conventional louver fin heat exchanger, Figure 2 is a view showing the shape of the louver fin used in the conventional louver fin heat exchanger.

The louver fin heat exchanger 10 is composed of a louver fin 11 and a tube 12, and is formed mostly of a metal material having high thermal conductivity, and uses a thin member to reduce weight. In general, the louver fan 11 and the tube 12 are joined by welding. In general, a heat transfer fluid flows inside the tube 12, and a gas that does not heat transfer to the louver fin 11 side flows. The gas flows into the louver fan 11 in the depth direction of the louver fan 11 as in the arrow direction shown in FIG. The gas flowing through the louver fan 11 and the fluid flowing through the tube 12 are different in temperature from each other, do not mix with each other, and flow at right angles to each other. In order to increase the heat exchange amount, the louver fin 11 and the tube 12 are alternately stacked, welded, and used. In order to improve overall performance of the apparatus using the louver fin heat exchanger 10, the tube 12 is vertically arranged and the louver fin 11 is often used horizontally.

In the louver fin (11), the number, width, and tilt angle of the louvers, and the layout of the louvers are used for heat transfer performance, flow resistance to gas flow, drainage performance, frost formation, clogging of contaminants, fan power, weight , Productivity, mold durability and many other aspects.

Louver 휜 (11) has a very good heat transfer in the louver portion and relatively low heat transfer in the absence of the louver. However, gas flowing from the louver fin heat exchanger to the inlet of the louver fin is concentrated at the louverless edge. This nonuniformity of flow is negative for the effective use of the entire louver shock.

When the louver fin heat exchanger 10 is used in an air conditioner evaporator, if condensate is generated on the louver fin surface, the louver fin 11 has a negative effect on the smooth discharge of the condensate. Condensate accumulates at the edge of the louver and consequently increases the pressure drop in the gas flow, reduces heat transfer, increases the likelihood of freezing when overloaded, condensate is blown back into the air conditioning space, It decays with organic matter, generates odors, and acts as a bad element for hygiene. Therefore, it is advantageous in many respects that the condensate generated in the louver fin heat exchanger 10 is discharged quickly and, if possible, with as little residual water as possible.

In order to solve the problems caused by the residual condensate, a UV lamp may be installed near the louver fin heat exchanger 10 or a separate auxiliary heater may be used. However, since this method uses a separate device, the size of the entire system is increased and the cost is increased.

It is an object of the present invention to provide a louver shock with even distribution of gas in contact with the surface of the louver shock, thereby reducing the pressure drop on the gas side and increasing heat transfer performance.

The present invention also provides a louver fan capable of reducing the generation of hygienic and odor by improving the drainage speed of condensate in the louver fan and reducing the amount of residual condensate in the louver fan without a separate device. It aims to do it.

In order to achieve the above object, the louver shock according to the embodiment of the present invention includes a body portion, louver, dimple. The body portion is formed in a thin plate and has a wavy shape having a valley and a floor. Louvers are formed on each of the inclined surfaces forming the wave of the body part and a plurality of louvers. The dimples protrude toward the inside (gas flow side) of the body portion at the portion where the louver is not formed. Specifically, the dimples may be formed in the valley and the floor.

The dimple of the louver shock according to the embodiment of the present invention may be open to both sides in the advancing direction of the gas passing through the body portion.

)의 20% 이상 100% 이하로 형성될 수 있다. The louver 에 according to the embodiment of the present invention has a depth D _d of the dimple equal to half the height of the region where the louver of the body part is not formed.

20% or more and 100% or less).

Louver 휜 according to an embodiment of the present invention has a predetermined width (D _w ) along the depth (F _d ) of the valley or floor, a plurality of grooves may be formed in one valley or floor.

Louver 버 according to an embodiment of the present invention may be a total sum of the width (D _w ) of a plurality of dimples formed in one valley or floor is 10% or more and 60% or less of the depth (F _d ) of the valley or floor of the body portion. have.

In the louver according to an embodiment of the present invention, a plurality of dimples formed in one valley or floor may be formed such that each depth becomes larger in the direction of travel of the gas passing through the body portion.

In the louver according to an embodiment of the present invention, a plurality of dimples formed in one valley or floor may be formed such that the interval between the dimples becomes narrower toward the traveling direction of the gas passing through the body portion.

The dimple of the louver shock according to the embodiment of the present invention may be formed so that the bottom surface thereof is inclined with respect to the traveling direction of the gas passing through the body portion.

The heat exchanger according to the embodiment of the present invention includes a louver fin and a tube. The louver 휜 may be provided with a corrugated body portion formed of a thin plate having a valley and a floor, and a plurality of louvers formed on each inclined surface forming a wave of the body portion and dimples formed on the valley and the floor of the body portion. The tubes are joined along the valleys or ridges of the louver shocks and the fluid moves through the tubes.

The louver 휜 and the heat exchanger including the same according to the present invention form a dimple in the valley and floor where the louver cannot be formed in the louver 소 by slightly changing the manufacturing mold without a separate device, and at the portion where the louver is not formed. Better flow distribution, reduced air pressure drop and increased heat transfer.

In addition, the dimple acts as a drainage passage between the louver fan and the tube, which improves drainage performance, improves heat transfer and pressure drop performance, reduces condensed residual water, and improves hygiene on the heat exchanger gas side. It is reduced and the comfort is improved.

1 is a view showing a conventional louver fin heat exchanger.
2 is a view showing the shape of a louver fan used in a conventional louver fan heat exchanger.
3 is a view showing a louver fan and one wave portion thereof according to an embodiment of the present invention.
4 is a view showing the drainage direction according to the formation of the dimple in the louver fan according to the embodiment of the present invention.
FIG. 5A is a view illustrating a louver fan having dimples having both sides open in a direction of air movement according to an embodiment of the present invention, and FIG. 5B is a view illustrating one wave portion thereof.
6 is a view showing a heat exchanger having a louver fin having dimples according to an embodiment of the present invention.
7 is a view showing the specifications of the heat exchanger having a louver fin with dimples according to an embodiment of the present invention.
8 is a view showing that dimples are formed in various shapes in the louver fin of the heat exchanger according to the embodiment of the present invention.
FIG. 9 shows an equal pressure distribution of air in the middle plane between louver shocks.
10 is a diagram comparing heat transfer capacity for the same fan (fan) power.
It is a figure which shows the flow velocity distribution of air with respect to the height direction of louver fan.
12 is a view showing a change in the amount of residual water per unit surface area of the heat exchanger with time when the width of the dimple is changed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this time, it is noted that the same components in the accompanying drawings are represented by the same reference numerals as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated.

3 is a view showing a louver fan and one wave portion thereof according to an embodiment of the present invention.

As shown in FIG. 3, the louver shock 100 according to an embodiment of the present invention includes a body 110, a louver 120, and a dimple 130. The body portion 110 is a portion forming the overall shape of the louver shock 100, and is formed in a wave shape of a thin plate. Wavy shape means a shape having ups and downs with valleys and floors. As the body portion 110 is formed in a wavy shape of a thin plate, the surface area in contact with the gas is increased without disturbing the flow of the gas in contact with the body portion 110, thereby increasing the overall heat transfer efficiency of the louver fin 100. . In addition, the body portion 110 is formed of a metal material having high thermal conductivity and easy to mold, and is formed of aluminum in this embodiment.

The louver 120 is formed on an inclined surface forming a wave of the body portion 110. The louver 120 is partially cut and bent at an angle with respect to the air flow direction. The louver 120 may be formed in plural and may be formed in a group unit arranged at equal intervals according to the formation direction. In the present embodiment, the louver 120 is formed in two groups with respect to one inclined surface of the body part 110, and the cut directions are formed in opposite directions. The louver 120 may increase the flow rate of the incoming gas (air in this embodiment) and provide a plurality of intermittent surfaces to increase the heat exchange rate between the circulating fluid and the air passing through the body part 110.

The dimple 130 may be formed by cutting a portion of the body portion 110 or by applying pressure using a device such as a press or the like, or may be formed through a protrusion formed in a manufacturing mold. The dimple 130 is formed in a groove shape protruding to the inner side (the side through which air flows) of the body part 110. The shape of the dimple 130 may be formed in various shapes such as a circle, an ellipse, and a polygon. The dimple 130 is formed at a portion where the louver 120 is not formed in the body portion 110. In the present embodiment, the dimple 130 is formed in the valley and the floor where the louver 120 may not be formed among the body parts 110.

A plurality of dimples 130 may be formed along one valley or the floor. Each dimple 130 may be formed to have a constant length along the valley or the floor. The flow of air varies depending on the length, width, spacing between the dimples 130, and the like.

In louver fins without dimples, the local heat transfer coefficient and flow resistance are relatively smaller than those of the louver. However, when the dimple 130 is formed in the valleys and the floor of the body 110 as in the present embodiment, the dimples 130 increase the local turbulence degree in the valleys and the floor, and the air flows to the louver with excellent performance. By guiding the flow, the heat transfer for the same shock load on the air side increases.

4 is a view showing the drainage direction according to the formation of the dimple in the louver fan according to the embodiment of the present invention.

As shown in FIG. 4, the louver shock 100 according to the embodiment of the present invention has a dimple 130 formed on a valley and a floor of the body part 110. In the part where the dimple 130 is formed, the valley and the floor of the body part 110 are lowered little by little. Therefore, as shown by the arrow in FIG. 4A, the air passes through the body part 110 in a direction perpendicular to the direction of the valley of the body part 110 and the depth F _d of the floor. Drainage is possible in a direction perpendicular to the direction.

In the case of the conventional louver fan, the drainage is better because the louver breaks the water film and serves as a passage of air, compared to the flat fan without the louver. However, even in the case of the conventional louver shock, there is a problem that the condensed water remains because the drainage passage is not secured in the portion where the louver is not formed. In comparison, the louver shock 100 according to the present invention forms a dimple 130 in the valley and the floor where the louver is not formed in the body part 110, thereby securing a drainage path, thereby improving drainage performance.

As shown in FIG. 4 (b), it can be clearly seen that the drain passage is secured when the louver shock 100 is coupled to the tube 200. The tube 200 is attached to the valley or the floor of the louver shock 100 when it is combined with the louver shock 100, as shown in the arrow direction shown in Figure 4 (b), the dimple 130 is formed The drainage space is created between the tube 200 and the louver shock 100 in the portion, and drainage is possible.

As such, the louver shock 100 having the dimple 130 according to the present invention has a drainage space formed between the louver shock 100 and the tube 200 due to the dimple 130, thereby improving drainage performance. The amount of residual water inside the uber shock 100 is reduced.

FIG. 5A is a view illustrating a louver fan having dimples having both sides open in a direction of air movement according to an embodiment of the present invention, and FIG. 5B is a view illustrating one wave portion thereof.

As shown in FIGS. 5A and 5B, the louver shock 300 according to an embodiment of the present invention includes a body 310, a louver 320, and a dimple 330. The dimples 330 are formed such that both sides of the dimples 330 open in the advancing direction of air passing through the body 310. Opening both sides of the dimple 330 means that holes 331 are formed at both sides to allow air to flow into the dimple 330.

Since both sides of the dimple 330 are opened, the movement of air through both sides of the dimple 330 is possible as well as drainage. Thus, the overall drainage performance of the louver shock 300 is improved.

The opening degree of both sides of the dimple 330 may be adjusted in consideration of drainage and air flow as a whole. In addition, the dimple 330 may open part or all of the sides in the direction perpendicular to the traveling direction of the air passing through the body 310 as well as both sides in the traveling direction of the air passing through the body 310. You can.

6 is a view showing a heat exchanger having a louver fin with dimples according to an embodiment of the present invention, Figure 7 is a view showing the specifications of the heat exchanger having a louver fin with dimples according to an embodiment of the present invention Drawing.

6 and 7, a heat exchanger 1000 according to an embodiment of the present invention includes a louver fin 1100 and a tube 1200. The louver fan 1100 and the tube 1200 may be joined by welding. In this embodiment, the louver fan 1100 and the tube 1200 are all made of aluminum and joined by aluminum welding.

) 보다 작으며 20%보다는 큰 것이 바람직하다. 즉, 루우버가 형성되지 않은 영역의 높이(

)가 2㎜라면 딤플(1130)의 깊이(D_d)는 0.2mm 내지 1.0㎜가 바람직하다. 이를 수식으로 나타내면

이다. 이론적으로 딤플(1130)의 깊이(D_d)가 클수록 열전달 성능이 우수하지만, 딤플(1130)의 깊이(D_d)가 루우버(1120)가 형성되지 않는 영역의 높이의 절반(

) 보다 크면 딤플(1130)이 루우버(1120)의 영역까지 형성되어 오히려 루우버(1120)에 의한 열전달 효율 향상을 방해하게 되어 전체적인 성능이 저하된다. 딤플(1130)의 깊이(D_d)가 루우버(1120)가 형성되지 않는 영역의 높이의 절반(

)의 20%보다 작으면, 딤플(1130)에 의한 열전달이나 배수 성능 개선 효과가 거의 없으며 용접 과정에서 딤플(1130)이 막히게 된다. The louver 1120 is provided with a louver 1120 at an intermediate position in the height y direction of the body portion 1110. In the body portion 1110 of the louver shock 1100, a dimple 1130 is formed in a valley and a floor where the louver 1120 is not formed. The depth D _d of the dimple 1130 is equal to half the height of the region where the louver 1120 is not formed in the body portion 1110 (

Less than) and greater than 20% is preferred. That is, the height of the area where no louver is formed (

) Is 2 mm, the depth D _d of the dimple 1130 is preferably 0.2 mm to 1.0 mm. If this is represented by a formula

to be. Theoretically, the larger the depth D _d of the dimple 1130, the better the heat transfer performance. However, the depth D _d of the dimple 1130 is equal to half the height of the region where the louver 1120 is not formed.

If larger than), the dimple 1130 is formed up to the region of the louver 1120, thereby preventing the improvement of heat transfer efficiency by the louver 1120, thereby degrading the overall performance. The depth D _d of the dimple 1130 is equal to half the height of the region where the louver 1120 is not formed (

When less than 20% of), the dimple 1130 has little effect of improving heat transfer or drainage performance, and the dimple 1130 is blocked in the welding process.

이다.

가 클수록 딤플(1130)이 형성된 부분이 많으므로 루우버 휜(1100)의 성능이 개선되지만,

가 0.7보다 크면 루우버 휜(1100)과 튜브(1200)의 용접 길이가 작아져 루우버 휜(1100)과 튜브(1200)의 용접이 제대로 되지 않아 열교환기(1000)의 생산이 어렵거나 생산성이 저감된다.

가 0.1보다 작으면 딤플(1130)이 너무 작아 열전달이나 배수 성능 등의 개선 효과가 작다.In addition, the total sum of the widths D _w of the plurality of dimples 1130 formed in one valley or the floor of the body 1110 is 10% or more of the depth F _d of the valley or the floor of the body 1110 70. It is preferable that it is% or less. If this is represented by a formula

to be.

The larger the more dimples 1130 are formed, so the performance of the louver shock 1100 is improved,

Is greater than 0.7, the weld length of the louver fin 1100 and the tube 1200 is reduced, so that the welder of the louver fin 1100 and the tube 1200 is not properly welded. Is reduced.

Is less than 0.1, the dimple 1130 is too small and the improvement effect such as heat transfer or drainage performance is small.

Fluid (generally water or refrigerant) flows inside the tube 1200. The fluid is in heat exchange with air through louver shocks 1100 bonded to the tube 1200. One tube 1200 may be bonded to each of the valleys and the floor of the louver fin 1100, and a plurality of louver fins 1100 may be stacked and positioned one therebetween to improve performance of the heat exchanger 1000. You may.

As described above, the heat exchanger 1000 including the louver fin 1100 having dimples has a high heat transfer efficiency and excellent drainage when compared to a heat exchanger having a louver fin having no dimples formed therein. Therefore, even when used in a closed space, such as a car, the odor is reduced and contributes to maintaining a comfortable environment.

8 is a view showing that dimples are formed in various shapes in the louver fin of the heat exchanger according to the embodiment of the present invention.

The dimples formed on the louver shocks may be in various forms in consideration of the purpose of use of the louver shocks, the location of use, and the manufacturing environment. In addition, when a plurality of dimples are formed in one valley or the floor, the shape of each dimple may vary, and the formation interval of the dimples may also vary.

The louver fin has a large temperature difference between the incoming air and the fluid passing through the tube at the inflow stage where the air enters, so the heat transfer and the temperature rise (or fall) of the incoming air are relatively large. However, the temperature difference between the incoming air and the fluid passing through the tube is smaller toward the discharge end where the air is discharged, so the temperature rise (or fall amount) of the air is smaller than the inlet end. Therefore, if a dimple is formed in the louver fin so that heat transfer is promoted at the discharge end side that is backward in the direction of air travel, heat transfer can be obtained for the same fin power. 8 illustrates an embodiment in which dimples are formed so that heat exchange is performed well in the rear in the advancing direction of air.

In one embodiment, as shown in (a) of FIG. 8, the dimples 2130 formed on the valleys or the floors of the body portion 2110 are inclined with respect to the direction in which air passes through the body portion 2110. (θ1). The inclination θ1 of the bottom of the dimple 2130 may be in the form of narrowing in the advancing direction of air passing through the body portion 2100 (that is, when θ1 is less than zero), but the bottom of the dimple 2130 is preferable. It is preferable that the inclination? As such, when the bottom inclination θ1 of the dimple 2130 is formed in the shape of the air flowing through the body portion 2100, the heat exchange is performed well in the rearward direction of the air.

In another embodiment, as illustrated in FIG. 8B, when a plurality of dimples 3130 are formed in one valley or floor of the body portion 3110, the depths of each dimple D _D1 and D _d2 ) can be different. It is preferable that the depths D _d1 and D _d2 of the dimples 3130 become larger toward the advancing direction of the air passing through the body portion 3110. As such, when the depths D _d1 and D _d2 of the dimples 3130 are formed to become larger in the advancing direction of the air passing through the body portion 3110, heat exchange is performed well in the rearward direction in the advancing direction of the air.

In another embodiment, as shown in FIG. 8C, when a plurality of dimples 4130 are formed in one valley or the floor of the body portion 4110, the intervals D _s1,. D _s2 ) can be different. The more dimples 4130 are formed in the louver to improve the performance of the louver, but the dimples 4130 that can be formed in one louver is limited by the width D _{w of} the dimple 4130. The number of is bound to be limited. When the dimples 4130 are formed in one louver 휜, even if the number of dimples 4130 is the same, the gap between the dimples 4130 becomes narrower toward the rear of the advancing direction of the air passing through the body portion 4110. If formed so that the heat exchange in the direction of the air is well done.

In another embodiment, as illustrated in FIG. 8D, the dimples 5130 may be formed in a winglet shape. The winglet shape refers to a shape in which the cross section of the dimple 5130 becomes a triangular shape. When the inclination θ2 of the winglets is formed to be greater than zero, heat exchange is performed well toward the rear of the air traveling direction, thereby improving heat exchange performance of the louver.

In order to confirm the performance of the heat exchanger having a louver fin according to the present invention, an air side pressure drop, heat transfer, and drainage experiments were performed.

In this experiment, the experiment was divided into a louver fin without dimples and a louver fin with dimples. In this experiment, numerical calculations of flow and heat transfer were performed using CFX 11, a commercial analysis code. The analysis method uses three-dimensional, laminar, steady state, and forced convection models.

For drainage experiments, the heat exchanger sample was fixed with the sample holder on the electronic balance, the sample was immersed in water, and the sample was taken out to measure the mass of the sample and water over time. At this time, the sample was made so that the wide surface of the louver fin was horizontal like an actual heat exchanger. From the measurement results, the mass of the sample was determined from the mass of the limiting water over time, and the mass of water per unit area of the sample surface was calculated.

FIG. 9 shows an equal pressure distribution of air in the middle plane between louver shocks.

FIG. 9A illustrates a Louver Fin in which no dimples are formed, and FIG. 9B illustrates a Louver Fin in which dimples are formed. In Fig. 9, the pressure drop is relatively constant in the direction of air flow because the louver fin without dimples is relatively larger than the linear louver fins with dimples and is linear with the number of louvers. This decreases. In the case of the louver fin without dimples, there is no louver near the tube wall, which is the valley and the floor of the louver fin, so the pressure drop is relatively lower than that of the louver portion. The flow of air is driven into the louver's valleys and floors, where the isobars are pushed downstream. In the dimpled Louver Fin, the dimple acts as a resistance element in the valleys and floors of the louver fin and reduces the flow concentration.

FIG. 10 is a graph comparing heat transfer capacity (heat transfer per unit temperature difference between air and tube) for the same fan power (product of pressure drop and air flow rate).

This experiment assumes that the heat transfer depends only on the air side, but changes the louver 루 in the heat exchanger from a louver fin without dimples to a simpled louver fin with dimples in the heat exchanger. It is like comparing the heat transfer for a case. The heat transfer amount of the dimpled louver fins was increased by about 5% compared to the louver fins without the dimples, which could increase as the size of the dimples increased.

It is a figure which shows the flow velocity distribution of air along the height direction of louver fan.

As shown in FIG. 11, the uniformity of the dimpled louver fins is higher than that of the louver fins without dimples, and the flow velocity at the center is faster. Therefore, the Louver Fin (Dimpled Louver Fin) of the present invention has a smaller air-side pressure drop than the Louver Fin (Double Louver fin). Heat transfer increases.

12 is a view showing a change in the amount of residual water per unit surface area of the heat exchanger with time when the width of the dimple is changed.

For this experiment, we divided into Louver Fin without dimple and Louver Fin with dimple, and Loud Fin with dimple is Fin according to the width of dimple. Experiment was divided into a, Fin b, Fin c. The width D _w of the dimple is Fin a of 4.4 mm, Fin b of 5.7 mm, and Fin c of 7.0 mm.

Initially, the remaining amount per unit surface area is nearly the same for all four samples. After a period of time, the drainage rate is almost the same. After 300 seconds, the remaining amount was small as 80%, 78%, and 75%, in order of the width of the dimple (D _w ), as compared to Louver Fin without dimples. That is, dimples are effective for drainage, and the larger the width of the dimples, the less residual water. Observing the drainage process, in the Louver Fin sample without dimples, water gathered from the upper louver to the lowest louver and drained periodically drop by drop. Dimpled Louver Fin-like samples were similar to Louver Fin samples without dimples and some water was collected in the dimples and drained to the wall of the tube.

The results of the experiment are summarized as follows: 1) The louver 형성된 with dimples at the same front wind velocity decreases by about 14% compared to the louver 이 without dimples, and 2) the louver 형성된 with dimples for the same load. The heat transfer amount was 5% higher than that of the silver dimpled louver).

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate description of the present invention and to facilitate understanding of the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100, 300, 1100: Louver 휜
110, 310, 1110, 2110, 3110, 4110: body
120, 320, 1120: Louver
Dimples 130, 330, 1130, 2130, 3130, 4130, 5130
200, 1200: tubes
331: hole
1000: Heat Exchanger

Claims (9)

A corrugated body portion formed of a thin plate and having a valley and a floor, a plurality of louvers formed on each inclined surface forming a wave of the body portion, and dimples protruding toward the inside of the body portion from the valley and the floor of the body portion; Including,
The dimple has a width (D _w ) along the depth (F _d ) of the valley or floor of the body portion, a plurality of dimples are formed in one valley or floor,
A bottom of the dimple has a louver 벌 having an inclination that extends in a direction in which the gas passes through the body part; And
And a tube coupled along the valley or floor of the louver fin and to which the fluid moves. The method of claim 1,
The dimple is a heat exchanger, characterized in that both sides open in the direction of travel of the gas passing through the body portion. delete delete The method of claim 1,
The total sum of the widths (D _w ) of the plurality of dimples formed in the one valley or floor is a heat exchanger, characterized in that more than 10% or less than 60% of the depth (F _d ) of the valley or floor of the body portion. delete The method of claim 1,
And a gap between the plurality of dimples formed in the one valley or the floor becomes narrower toward the traveling direction of the gas passing through the body portion. delete delete

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