KR20230153157A - Heat exchange fin and heat exchanger including the same - Google Patents

Abstract

According to an embodiment of the present invention, a heat exchange fin comprises: a fin plate with a heat exchange surface; and a fin collar protruding from the fin plate, into which a refrigerant pipe is inserted. The fin plate includes a waveform unit which is folded a plurality of times in a longitudinal direction. The waveform unit includes: a first slope and a second slope which are respectively extended to be inclined inward from both side end units of the fin plate; and a central sloped unit arranged between the first slope and the second slope, and folded once or more in a longitudinal direction. The central sloped unit is formed by punching a plurality of louvers extended in a longitudinal direction of the fin plate. Therefore, heat exchange performance can be improved.

Description

Heat exchange fin and heat exchanger {HEAT EXCHANGE FIN AND HEAT EXCHANGER INCLUDING THE SAME}

The present invention relates to heat exchange fins and heat exchangers having the same.

Generally, a heat exchanger is a device installed in an air conditioner for cooling or heating to perform heat exchange, and can function as a condenser or evaporator depending on whether the refrigerant condenses or evaporates due to heat exchange. In air conditioners such as air conditioners, fin-tube type heat exchangers are mainly used.

A fin-and-tube type heat exchanger includes fins and tubes. The fin may be provided with a plurality of through holes through which a tube can be inserted.

A plurality of fins are provided, and the plurality of fins may be arranged to be stacked along the extending direction of the tube. A predetermined space is formed between the stacked fins, and heat exchange can occur with the refrigerant in the tube as air flows into the predetermined space.

When a fin-tube heat exchanger is used as an outdoor heat exchanger, the refrigerant in the tube that absorbs heat from the air flowing outside the fin evaporates. At this time, the temperature of the outer wall of the tube falls below the dew point temperature, and moisture existing in the surrounding air accumulates on the surface of the tube and fin in the form of frost.

Fins such as louver fins and corrugated fins are widely used.

Corrugated fins have a wavy or wavy shape by bending the heat exchange plate multiple times, so heat exchange fluid can quickly pass along the upper or lower side of the corrugated part, reducing the occurrence of frost. However, heat exchange performance is relatively low. There are low problems.

The louver fin improves heat exchange performance by forming a plurality of louvers on the heat exchange plate to disturb the fluid passing through the heat exchange plate. However, when mounted on an outdoor heat exchanger and operated as an evaporator in winter, there is a problem in that frost easily occurs and water flowability is poor. This causes a decrease in the performance of the evaporator and an increase in energy consumption for defrosting. In addition, there is a problem in that the passage through which air can flow is blocked due to the stacking distance narrowed by the louvers, thereby increasing the defrost time of the heat exchanger.

Meanwhile, Republic of Korea Patent No. 1882020 and Publication Patent No. 2011-0083017 disclose a conventional heat exchange fin combining a corrugated fin and a louvered fin. The inventions disclosed in the above prior publications each include a first fin portion in which the fin plate has a corrugated shape and a second fin portion in which the fin plate has a louver shape.

However, the prior inventions are manufactured in a shape in which two types of fins are separately arranged on a single heat exchange plate, so they suffer from the problems of the louver fins and the problems of the corrugated fins.

Republic of Korea Patent Publication No. 10-1882020 B1 (Publication date 2018.07.19.) Republic of Korea Patent Publication No. 10-2011-0083017 (publication date 2011.07.20.)

The object of the present invention is to provide a heat exchange fin that can solve the problems of the prior art described above.

The problem to be solved by the present invention is to provide a heat exchange fin that can improve heat exchange performance by maximizing the heat exchange area and disturbing the air flow.

Another object of the present invention is to provide a heat exchange fin that can reduce the occurrence of frost by facilitating the flow of air.

Another object of the present invention is to provide a heat exchange fin that can easily drain condensate generated during heat exchange.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above object, a heat exchange fin according to an embodiment of the present invention includes a fin plate and a fin collar, wherein the fin plate has a wave-shaped portion bent a plurality of times and a louver is formed inside the wave-shaped portion. do.

Accordingly, the heat exchange fin according to the embodiment of the present invention has the advantages of each of the louver fin and the corrugated fin, and heat exchange efficiency can be greatly improved and the occurrence of frost can be reduced.

Meanwhile, the wave-shaped part has first and second slopes inclined inward from both ends of the fin plate, and a central slope part is formed between the first and second slopes.

The surfaces of the first and second slopes are each formed flat, and a louver is formed at the central slope. Accordingly, fluid flows in or out quickly through the first and second slopes, and the heat exchange area increases in the central slope, thereby reducing the occurrence of frost and improving heat exchange efficiency.

The fin plate has a depression formed between the fin collar and the corrugated part of the fin plate, so heat exchange performance can be further improved.

The recessed portion includes a base portion disposed around the pin collar, an inner slanted ridge formed to be inclined as the pin collar protrudes from the base portion, and is connected to the inner slanted ridge and protrudes obliquely from both ends of the pin plate. May include external slopes.

Since high-speed air flowing into the heat exchange fin can be directly guided to the tube by the outer inclined ridge, the heat exchange amount of the tube can be increased.

In addition, a condensate discharge port is formed in the recessed portion, so that condensed water generated during heat exchange can be quickly discharged to the outside from the heat exchange fin, thereby reducing the defrost time.

Specific details of other embodiments are included in the detailed description and drawings.

According to the heat exchange fin structure of the present invention, one or more of the following effects are achieved.

First, because a corrugated portion is formed on the fin plate and a louver is disposed on the corrugated portion, heat exchange performance is improved compared to existing corrugated fins.

Second, flat inclined surfaces are formed on both sides of the corrugated part where the louvers are formed, and fluid can quickly pass through the inclined surfaces, so the occurrence of frost is significantly reduced compared to existing louver fins.

Third, a depression is formed around the fin collar of the heat exchange fin to further promote heat exchange.

Fourth, a condensate discharge port is formed in the depression, so that condensate that forms around the tube during heat exchange can be quickly drained to the outside.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a heat exchange fin according to an embodiment of the present invention.
Figure 2 is a cross-sectional view taken along line A1-A2 in Figure 1.
Figure 3 is a cross-sectional view taken along line B1-B2 in Figure 1.
Figure 4 is a perspective view of a heat exchanger to which heat exchange fins are applied according to an embodiment of the present invention.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to be understood by those skilled in the art. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The terminology used herein is for the purpose of describing embodiments and is not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used herein, “comprises” and/or “comprising” means that a referenced component, step and/or operation excludes the presence or addition of one or more other components, steps and/or operations. I never do that.

In the drawings, the thickness or size of each component is partially enlarged, omitted, or schematically shown for convenience and clarity of explanation. Additionally, the relative size and area of each component do not reflect the actual relative size or area.

Hereinafter, the present invention will be described with reference to the drawings and a heat exchange fin and a heat exchanger according to an embodiment of the present invention.

Hereinafter, with respect to FIGS. 1 to 4, all parts that are inserted, coupled, fitted, contacted, joined, or assembled between heat exchange fin components may be joined by brazing. Hereinafter, the description of the brazing may be omitted.

1 is a perspective view showing a heat exchange fin according to an embodiment of the present invention.

Figure 2 is a cross-sectional view taken along line A1-A2 in Figure 1.

Figure 3 is a cross-sectional view taken along line B1-B2 in Figure 1.

Referring to FIGS. 1 to 3, the heat exchange fin 1 according to an embodiment of the present invention includes a fin plate 10 on which a heat exchange surface is formed, and a tube 2, which is formed to protrude from the fin plate 10. 4) includes a pin collar (20) into which it is inserted.

The fin plate 10 includes a thin metal plate. The fin plate 10 may be made of metal with excellent thermal conductivity.

The pin collar 20 may protrude on one or both sides of the pin plate 10. The transverse cross-section of the fin collar 20 is formed to be the same as the transverse cross-sectional shape of the tube 2, so that the tube 2 through which a heat exchange medium such as a refrigerant passes can be inserted into the fin collar 20. One or more pin collars 20 may be formed on the pin plate 10.

The heat exchange fins (1) may be arranged in half on the left and right sides along the longitudinal center (O) of the fin plate (10) and integrated into one piece, and on the left and right sides along the width direction (C1 or C2) of the tube (2). A plurality of them may be placed on the right and combined into one piece.

The heat exchange fin 1 according to this embodiment will be described based on the arrangement of two fin collars 20 on one fin plate 10.

The fin plate 10 has a wave-shaped portion 110 that is bent multiple times along the length direction. Here, the longitudinal direction refers to the direction in which the plurality of pin collars 20 are arranged. The fan (not shown) is arranged to be spaced apart from the front or rear of the heat exchange fin (1) in the width direction of the heat exchange fin (1), and air can be introduced through the fan (not shown) in the width direction. Accordingly, air blown by a fan (not shown) may flow and pass along the shape of the wave-shaped portion 110 of the fin plate 10.

The bending of the wave-shaped portion 110 may be curved, angular, or a combination thereof. The angle at which the wave-shaped portion 110 is bent may be formed as an obtuse angle. The wave-shaped portion 110 may be bent multiple times. The heat exchange fins 1 according to this embodiment are bent three times.

The wave-shaped portion 110 is disposed between the first and second slopes 121 and 122 and the first and second slopes 121 and 122, respectively, extending obliquely inward from both ends of the pin plate 10, and is disposed at least once along the longitudinal direction. It includes a bent central inclined portion 130.

The ratio of the areas of the first and second slopes 121 and 122 and the area of the central slope 130 may be determined according to the heat transfer characteristics required for the air conditioner.

Both end portions 101 and 102 may be formed to extend horizontally along the longitudinal direction of the pin plate 10. Accordingly, the resistance of air flowing in through the fan can be minimized and accepted.

The waveform portion 110 may be formed symmetrically on the left and right sides with respect to the central portion (O). The first inclined surface 121 and the second inclined surface 122 may have the same shape, the same area, and the same bending angle. Each inclined portion of the central inclined portion 130 may be formed symmetrically on the left and right sides with respect to the central portion (O).

Accordingly, the manufacturing process of the heat exchange fin (1) can be simplified, and the assembly process when applying the heat exchange fin (1) to the heat exchanger (3) can be simple and convenient.

The first and second inclined surfaces 121 and 122 may be formed to be inclined in the direction in which the pin collar 20 protrudes. Accordingly, the third and fourth slopes 131 and 132 of the central slope 130 may be formed to be inclined in a direction opposite to the direction in which the pin collar 20 protrudes. The third inclined portion 131 and the fourth inclined portion 132 may have the same shape, the same area, and the same bending angle.

The surfaces of the first and second slopes 121 and 122 may be formed to be flat, respectively. A flat surface without louvers is formed on the first and second slopes 121 and 122 through which air flows in or out in the width direction of the heat exchange fin (1), allowing air to flow quickly, making the air vulnerable to frost. The occurrence of frost can be reduced at the inlet or outlet.

The central inclined portion 130 may be repeatedly bent several times to have a plurality of inclined portions. It is preferable that the bending directions are alternately bent in opposite directions, so that the overall shape of the fin plate 10 has a wavy or undulating shape.

The central inclined portion 130 includes a third inclined portion 131 inclined inward from the first inclined surface 121 in a direction opposite to the first inclined surface 121, and a third inclined portion 131 inclined inward from the second inclined surface 122. It may include a fourth inclined portion 132 inclined in a direction opposite to the second inclined surface 122.

The central inclined portion 130 may be bent once to form third and fourth inclined portions 131 and 132 inclined in opposite directions with respect to the central portion O. The central inclined portion 130 of the heat exchange fin 1 according to this embodiment is composed of third and fourth inclined portions 131 and 132.

The central inclined portion 130 is formed by punching out a plurality of louvers 140 extending along the longitudinal direction of the fin plate 10. The width of each louver 140 may be formed to be constant. The louver 140 may be disposed to protrude obliquely from the upper and lower surfaces of the inclined portion constituting the central inclined portion 130, respectively.

Alternatively, the louver 140 may be disposed to obliquely protrude only from the upper portion of the inclined portion constituting the central inclined portion 130, or may be disposed to obliquely protrude only from the lower portion.

A long hole 150 is formed between the louvers 140 and the louver 140, and heat exchange is promoted because fluid can pass through the upper and lower parts of the fin plate 10 through the long hole 150.

The long hole 150 is a second long hole formed between the first long hole 151 formed between the first louver 141 of the third inclined portion 131 and the second louver 142 of the fourth inclined portion 132 ( 152) may be included.

The louver 140 may be disposed to be inclined at a predetermined angle θ with respect to the fin plate 10. The predetermined angle (θ) is defined as “louver angle”.

The louver 140 may include a first louver 141 in the third inclined portion 131 and a second louver 142 in the fourth inclined portion 132. The first louver 141 and the second louver 142 may have the same shape, the same width, and the same louver angle.

The louver 140 may include a plurality of first louvers 141 formed on the third inclined portion 131 and a plurality of second louvers 142 formed on the fourth inclined portion 132.

The louver 140 may be disposed to be inclined in a direction opposite to the direction in which the inclined portion of the central inclined portion 130 is inclined. Each of the plurality of first louvers 141 may be arranged to be inclined in a direction opposite to the direction in which the third inclined portion 131 is inclined. Each of the plurality of second louvers 142 may be arranged to be inclined in a direction opposite to the direction in which the fourth inclined portion 132 is inclined.

For example, in the heat exchange fin 1 according to an embodiment of the present invention, if the third inclined portion 131 is bent clockwise, the first louver 141 is bent against the third inclined portion 131. It is arranged clockwise. If the fourth inclined portion 132 is bent counterclockwise, the second louver 142 is arranged clockwise with respect to the fourth inclined portion 132.

The louver 140 may be formed by cutting and bending a portion of the inclined portion of the central inclined portion 130, or may be formed by manufacturing a separate louver configuration and joining it to the fin plate 10 by brazing.

Air flows into one side of the heat exchange fin 1, and some of the air may pass through the top of one side end 101, the top of the first slope 121, and the third slope 131. In detail, the air moves along the first louver 141 of the third inclined portion 131.

Some of the air may move along the lower part of one end 101 and the lower part of the first slope 121. Air passes through the first long hole 151 between the first louvers 141 of the third inclined portion 131 and passes from the lower side to the upper side of the fin plate 10.

Accordingly, the air flowing into one side of the heat exchange fin (1) flows quickly along the first slope 121 without a louver, thereby reducing the occurrence of frost, and the flow of air by the first louver 141. Disturbance may cause residence time to become longer and the heat exchange area to expand.

Air passing through the longitudinal central portion (O) flows out through the fourth inclined portion 132, the second inclined surface 122, and the other end portion 102. Air passes through the second long hole 152 between the second louvers 142 of the fourth inclined portion 132 and passes from the upper side to the lower side of the fin plate 10.

Accordingly, the air flowing out to the other side of the heat exchange fin (1) flows quickly along the second slope 122 without a louver, thereby reducing the occurrence of frost, and the air flows by the second louver 141. Disturbance may cause residence time to become longer and the heat exchange area to expand.

A depression 200 may be formed between the pin collar 20 and both ends 101 and 102 of the pin plate 10 and the wave-shaped portion 110.

The depression 200 has a base portion 210 disposed perpendicular to the pin collar 20 around the pin collar 20, and a pin collar 20 at a predetermined distance from the base portion 210. It may include an inner inclined jaw 220 formed to be inclined in the protruding direction of the collar 20.

Accordingly, the air flowing into the heat exchange fin (1) can exchange heat by directly contacting the tube (2), and the residence time of the air around the tube (2) is increased due to the depression 200, thereby increasing heat exchange efficiency. It can increase.

The inner slope ridge 220 may be continuously connected to the wave-shaped portion 110 and may be continuously connected to the outer slope ridge 230 obliquely protruding from both ends 101 and 102 of the fin plate 10.

The width W2 between the lowest points C of the inner slope 220 or the outer slope ridge 230 may be larger than the outer diameter W1 of the pin collar 20. In Figure 1, the lowest point (C) of the inner sloping jaw 220 or the outer sloping jaw 230 is located on the cut surface of B1-B2. Accordingly, the area and time for heat exchange between the refrigerant and air flowing through the tube 2 can be increased.

The height (H4) from the base part 210 to the lowest point (C) of the inner slope ridge 220 is from the base part 210 to the highest point (F) of the first slope 121 and the third slope 131. It may be lower than the height (H2). Accordingly, the outer slope 230 is formed lower than the first and second slopes 121 and 122, so that the incoming air can be guided to move well into the depression 200.

The base portion 210 may be located on a virtual plane H0 formed by the both ends 101 and 102 of the pin plate 10. The base portion 210 may be formed flat in a shape that enlarges the transverse cross-section of the pin collar 20.

The base portion 210 may be formed with a condensed water discharge hole 211 through which condensed frost can be discharged. Accordingly, frost that occurs when the outdoor heat exchanger is used as an evaporator is quickly discharged downward through the condensate discharge hole 211, so defrosting time can be reduced and heat exchange performance can be improved.

Figure 4 is a perspective view of a heat exchanger to which heat exchange fins are applied according to an embodiment of the present invention.

Referring to FIG. 4, the heat exchanger 3 according to an embodiment of the present invention includes heat exchange fins 1 and tubes 2.

The heat exchange fins 1 of the heat exchanger 3 according to an embodiment of the present invention have substantially the same configuration as the heat exchange fins 1 described above. Therefore, duplicate descriptions of the same components will be omitted, and the same components will be given the same names and same reference numerals.

The tube 2 may be manufactured in the form of a pipe through which refrigerant flows.

The heat exchange fin (1) is coupled to the outer surface of the tube (2) and functions to increase the heat exchange area between the refrigerant and the air of the tube (2). A plurality of heat exchange fins (1) may be combined and stacked on the outer surface of the tube (2).

Heat exchange fins 1 may be stacked at predetermined intervals D. However, if the stacking interval becomes too narrow, air may not flow smoothly, which may increase defrost time and reduce heating performance. If the stacking interval becomes too wide, the number of heat exchange fins 1 to be stacked decreases, and heat exchange performance may deteriorate. Therefore, the gap between the heat exchange fins 1 must be formed within an appropriate range.

The heat exchange fin (1) may be coupled to a single tube (2) or a plurality of tubes (2) depending on the number of fin collars (20). The heat exchange fin according to this embodiment has two fin collars (20) and is thus coupled to two tubes (2).

The heat exchange fins 1 of the heat exchanger 3 according to an embodiment of the present invention include a fin plate 10 on which a wave portion 110 is formed, and the fin plate 10 is located on both sides in the width direction through which air flows in and out. Flat first and second slopes 121 and 122 are formed, and a plurality of louvers 140 are applied to the central slope 130, so that not only can the occurrence time of frost be delayed, but also heat exchange area and time are increased. Improves performance further.

In the above, preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and can be used in the technical field to which the invention pertains without departing from the gist of the present invention as claimed in the patent claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

1: Heat exchange fin
2: tube
3: Heat exchanger
10: pin plate
20: pin collar
101: One side end
102: Other side end
121: First slope
122: Second slope
131: 3rd Light Division
132: 4th Light Division
141: First louver
142: Second louver
200: depression
210: base part
211: Condensate discharge hole
220: Medial inclined jaw
230: External sloping jaw

Claims (18)

A fin plate with a heat exchange surface formed; and
It includes a fin collar formed to protrude from the fin plate into which a tube is inserted,
The pin plate has a wave-shaped portion bent multiple times along the longitudinal direction,
The wave-shaped portion includes first and second inclined surfaces extending obliquely inward from both ends of the pin plate, and a central inclined portion disposed between the first and second inclined surfaces and bent at least once along the longitudinal direction,
The central inclined portion is a heat exchange fin formed by punching out a plurality of louvers extending along the longitudinal direction of the fin plate. According to clause 1,
The central slope portion includes a third slope portion inclined inward from the first slope surface in an opposite direction to the first slope surface,
A heat exchange fin including a fourth inclined portion inclined inward from the second inclined surface in a direction opposite to the second inclined surface. According to clause 2,
The central slope is formed by the third and fourth slopes,
The longitudinal central portion of the central slope is bent,
The third and fourth inclined portions are heat exchange fins inclined in opposite directions with respect to the central portion. According to clause 2,
The wave-shaped portion is a heat exchange fin in which the left and right sides are symmetrically formed with respect to the central portion. According to clause 2,
The first and second inclined surfaces are heat exchange fins formed to be inclined in a direction in which the fin collar protrudes. According to clause 5,
A heat exchange fin in which the surfaces of the first and second inclined surfaces are formed to be flat. According to clause 6,
A plurality of first louvers are formed on the third slope,
Each of the first louvers is a heat exchange fin disposed to be inclined in a direction opposite to the third inclined portion. According to clause 6,
A plurality of second louvers are formed on the fourth slope,
Each of the second louvers is a heat exchange fin disposed to be inclined in a direction opposite to the fourth inclined portion. According to clause 1,
A heat exchange fin in which a depression is formed between the fin collar, both ends of the fin plate, and the corrugated portion. According to clause 9,
The recessed portion includes a base portion disposed around the pin collar and perpendicular to the pin collar; and
A heat exchange fin including an inner inclined ridge formed to be inclined in a protruding direction of the fin collar at a portion spaced apart from the base portion at a predetermined distance from the fin collar. According to clause 10,
The inner inclined ridge is continuously connected to the wave-shaped portion and is continuously connected to the outer inclined ridge obliquely protruding from both ends of the fin plate. According to clause 10,
The base portion is a heat exchange fin located on a virtual plane formed by both ends of the fin plate. According to clause 10,
The base portion is a heat exchange fin having a condensate discharge hole through which condensed frost can be discharged. According to clause 10,
The lowest height (H4) in the width direction of the inner inclined ridge from the base portion is lower than the highest height (H2) of the first inclined surface and the third inclined portion from the base portion. According to clause 10,
A heat exchange fin in which the height (H3) of the fin collar from the base portion is equal to or smaller than the highest height (H2) of the first inclined surface and the third inclined portion from the base portion. According to clause 10,
The bent central portion of the central inclined portion is a heat exchange fin located at a predetermined height (H1) from the base portion. According to clause 1,
A heat exchange fin in which the width (W2) of the central inclined portion is greater than the outer diameter (W1) of the fin collar. According to any one of claims 1 to 17,
A heat exchanger in which a tube through which refrigerant flows is inserted into the fin collar.

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