WO2018041138A1

WO2018041138A1 - Fin and heat exchanger having same

Info

Publication number: WO2018041138A1
Application number: PCT/CN2017/099648
Authority: WO
Inventors: 肖瑞雪; 高强; 梁欣; 闫志恒
Original assignee: 杭州三花微通道换热器有限公司
Priority date: 2016-08-30
Filing date: 2017-08-30
Publication date: 2018-03-08

Abstract

A fin (10) and a heat exchanger having the fin (10) are provided. The fin (10) comprises a fin body (11). The fin body (11) comprises multiple heat dissipation fin units (100) arranged along a longitudinal direction of the fin body (11). Each heat dissipation fin unit (100) comprises a heat transfer section (110) and a first side section (120) that are arranged along a lateral direction of the fin body (11). The first side section (120) is located on an airflow-facing side relative to the heat transfer section (110). The first side sections (120) of adjacent heat dissipation fin units (100) meet each other to extend continuously along the longitudinal direction. A slot is formed between the heat transfer sections (120) of adjacent heat dissipation fin units (100). The heat transfer section (110) is provided with a first water guide protruding strip (111) that extends downwards from the heat transfer section (110) to the first side section (120) in a direction inclined relative to the lateral direction of the fin body (11). At least a part of an airflow-facing portion of the first water guide protruding strip (111) extends into the first side section (120). The fin (10) and the heat exchanger with the fin (10) of the present invention can improve performance in discharging condensate, and reduce blockage caused by a frost layer, improving heat exchange efficiency.

Description

Fin and heat exchanger having the same

Technical field

The present invention relates to the field of heat exchange technology, and in particular to a fin and a heat exchanger having the same.

Background technique

A parallel flow heat exchanger such as a microchannel heat exchanger is composed of a collecting pipe, a heat exchange tube and fins, the fins are corrugated structures, fins are disposed between adjacent heat exchange tubes, and fin surfaces are opened to occupy wings. Most of the louvers of the film, the refrigerant flows through the passage in the heat exchange tube and exchanges heat with the air flowing through the fins, and the fins with the louvers of the heat exchanger are easy to be trapped in water and fragrant, thereby causing the condensed water to be excluded. Smooth and frost layer easily clogging the heat exchanger and causing a problem of reduced heat exchange efficiency.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, an aspect of the present invention provides a fin which is capable of improving the condensed water removal performance and reducing the clogging of the frost layer, thereby improving heat exchange efficiency.

Another aspect of the invention provides a heat exchanger having the fins.

In order to achieve the above object, an embodiment according to a first aspect of the present invention provides a fin, a sheet body including a plurality of heat dissipating units arranged along a longitudinal direction of the sheet body, each heat dissipating unit including along the sheet a transversely-arranged heat transfer section of the body and a first side section, the first side section being located on the windward side with respect to the heat transfer section, the first side sections of adjacent heat dissipation units being connected to each other to The longitudinal direction continuously extends, a tube groove is formed between the heat transfer sections of the adjacent heat dissipating units, the heat transfer section is provided with a first water guiding ridge, and the first side section has a corrugated portion. At least a portion of the first water guiding rib is in contact with the corrugated portion.

The fin according to the embodiment of the present invention can improve the elimination performance of the condensed water and reduce the clogging of the frost layer, thereby improving the heat exchange efficiency.

In addition, the fins according to embodiments of the present invention also have the following additional technical features:

According to an embodiment of the invention, at least a portion of the first water guiding ridge extends obliquely downward from the heat transfer section toward the first side section with respect to a lateral direction of the sheet body.

According to an embodiment of the invention, the angle between the first water guiding ridge and the lateral direction of the sheet body is 10° ≤ α ≤ 70°.

According to an embodiment of the invention, the corrugated portion on the first side section extends onto the heat transfer section, at least a portion of the first water guiding ridge and the corrugation of the first side section a portion of the portion extending to the heat transfer section touch.

According to an embodiment of the invention, at least a portion of the windward side portion of the first water guiding rib extends into the first side section.

According to an embodiment of the invention, the first side section has a straight section, the straight section is located between the corrugated portion and the heat transfer section, and the first water guiding rib extends to The straight section is on, and at least a portion of the first water guiding rib is in contact with the corrugated portion on the first side section.

According to an embodiment of the present invention, a projection of the first water guiding ridge on a plane orthogonal to a longitudinal direction of the sheet body has a length w3 in a lateral direction of the sheet body, the heat transfer section The width in the lateral direction of the sheet is w2, and the sum of the widths of the heat transfer section and the first side section in the lateral direction of the sheet is w1, where w2/2≤w3≤( W1+w2)/2.

According to an embodiment of the present invention, a cross-sectional area of the end of the first water guiding ridge facing the first side section is gradually reduced in a direction toward the first side section to form a contraction section, the contraction At least a portion of the segment is in contact with the corrugated portion.

According to an embodiment of the present invention, a projection of the first water guiding ridge on a plane orthogonal to a longitudinal direction of the sheet body has a length w3 in a lateral direction of the sheet body, the first water guiding The projection of the constricted section of the ridge on a plane orthogonal to the longitudinal direction of the sheet has a length w4 in the lateral direction of the sheet, where 0 ≤ w4 ≤ w3/2.

According to an embodiment of the invention, at least a portion of the first water guiding rib extends into the corrugated portion.

According to an embodiment of the present invention, a cross-sectional area of the end of the first water guiding ridge facing the first side section is gradually reduced in a direction toward the first side section to form a contraction section, the contraction At least a portion of the segment extends into the corrugated portion.

According to an embodiment of the present invention, the first water guiding ridges are at least two, and the at least two first water guiding ribs are arranged along the longitudinal direction of the heat dissipating unit and abut each other, the at least two The constricted sections of the first water guiding ribs abut each other.

According to an embodiment of the invention, the first water guiding ridge has a triangular cross section.

According to an embodiment of the invention, the heat transfer section is further provided with an auxiliary protrusion, and the auxiliary protrusion is located on the windward side with respect to the first water guiding ridge.

According to an embodiment of the present invention, an end of the heat transfer section remote from the first side section forms a protrusion, the height of the protrusion in the longitudinal direction of the sheet body is smaller than that of the heat transfer section The height in the longitudinal direction of the sheet, the protrusion extending outside the tube groove for mounting the heat exchange tube.

According to an embodiment of the invention, the tube groove is provided with a positioning structure on the edge thereof, the positioning structure is an arc structure, and the arc structure is curled in a direction away from the tube groove.

According to an embodiment of the invention, each fin unit further comprises a second side section, the second side section being opposite The heat transfer section is located on the leeward side, and the heat transfer section is further provided with a second water guiding rib.

According to an embodiment of the invention, the sheet body is axisymmetric with respect to a longitudinal centerline of the heat transfer section.

According to an embodiment of the second aspect of the present invention, there is provided a heat exchanger comprising: a first header and a second header; a plurality of fins, the fins being according to the present invention In the fin of the embodiment, the fins are arranged spaced apart from each other between the first header and the second header; a plurality of heat exchange tubes, both ends of the heat exchange tube And respectively connected to the first header and the second header, and the heat exchange tubes are respectively fitted in corresponding tube slots of the fins. The heat exchanger according to the embodiment of the present invention has the advantages of facilitating the elimination of condensed water, being less likely to be frosted, and the frost layer is not easily clogged and the heat exchange efficiency is high.

According to an embodiment of the invention, the plurality of fins are divided into a first set of fins and a second set of fins, and the heat exchange tubes are divided into a first set of heat exchange tubes and a second set of heat exchange tubes, The first group of heat exchange tubes are respectively fitted in the tube grooves of the first group of fins, and the second group of heat exchange tubes are respectively fitted in the tube grooves of the second group of fins, the first group of wings The sheets are spaced apart from each other along the length direction of the first set of heat exchange tubes between the first header and the second header, and the second set of fins are along the second group The longitudinal direction of the heat exchange tubes is spaced apart from each other between the first header and the second header, the first set of fins and the second set of fins along the first The collector tube and the second header are radially spaced apart.

DRAWINGS

1 is a schematic view showing the structure of a fin according to an embodiment of the present invention.

2 is a schematic structural view of a heat dissipating unit of a fin according to a first alternative embodiment of the present invention.

3 is a schematic structural view of a heat dissipating unit of a fin according to a second alternative embodiment of the present invention.

4 is a schematic structural view of a heat dissipating unit of a fin according to a third alternative embodiment of the present invention.

Figure 5 is a schematic view showing the structure of a heat dissipating unit of a fin according to a fourth alternative embodiment of the present invention.

Figure 6 is a schematic view showing the structure of a heat dissipating unit of a fin according to a fifth alternative embodiment of the present invention.

7 is a schematic structural view of a heat dissipating unit of a fin according to a sixth alternative embodiment of the present invention.

Figure 8 is a schematic view showing the structure of a heat dissipating unit of a fin according to a seventh alternative embodiment of the present invention.

Figure 9 is a schematic view showing the structure of a heat dissipating unit of a fin according to an eighth alternative embodiment of the present invention.

Figure 10 is a plan view of the heat dissipation unit of Figure 9.

Figure 11 is a schematic view showing the structure of a heat dissipating unit of a fin according to a ninth alternative embodiment of the present invention.

Figure 12 is a schematic view showing the structure of a heat dissipating unit of a fin according to a tenth alternative embodiment of the present invention.

Figure 13 is a schematic view showing the structure of a heat dissipating unit of a fin according to an eleventh alternative embodiment of the present invention.

FIG. 14 is a schematic perspective view of the heat dissipation unit of FIG.

Figure 15 is a schematic view showing the structure of a heat dissipating unit of a fin according to a twelfth alternative embodiment of the present invention.

Figure 16 is a schematic view showing the structure of a heat dissipating unit of a fin according to a thirteenth alternative embodiment of the present invention.

Figure 17 is a schematic view showing the structure of a heat dissipating unit of a fin according to a fourteenth alternative embodiment of the present invention.

Figure 18 is a schematic view showing the structure of a heat dissipating unit of a fin according to a fifteenth alternative embodiment of the present invention.

Figure 19 is a schematic view showing the structure of a heat dissipating unit of a fin according to a sixteenth alternative embodiment of the present invention.

Figure 20 is a schematic view showing the structure of a heat dissipating unit of a fin according to a seventeenth alternative embodiment of the present invention.

Figure 21 is a schematic view showing the structure of a heat dissipating unit of a fin according to an eighteenth alternative embodiment of the present invention.

Figure 22 is a partial structural schematic view of a heat exchanger according to an embodiment of the present invention.

Figure 23 is a partial structural schematic view of a heat exchanger according to another embodiment of the present invention.

Reference mark:

Fin 10, heat exchange tube 20, first set of fins 30, second set of fins 40, first set of heat exchange tubes 50, second set of heat exchange tubes 60,

The sheet body 11, the heat dissipation unit 100, the heat transfer section 110, the first side section 120, the tube groove 130, the protrusion 140, the first water guiding rib 111, the auxiliary protrusion 112, the corrugated part 113, the positioning structure 114, The constricted section 115, the second water guiding rib 116, and the second side section 150.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

The fins 10 according to an embodiment of the present invention are described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 23, the fin 10 according to an embodiment of the present invention includes a sheet body 11 including a plurality of heat radiating units 100 arranged in the longitudinal direction of the sheet body 11. Each of the heat dissipation units 100 includes a heat transfer section 110 and a first side section 120 arranged along the lateral direction of the sheet body 11, the first side section 120 being located on the windward side with respect to the heat transfer section 110, that is, passing through the fins 10 The wind first contacts the first side section 120 and then contacts the heat transfer section 110. The first side sections 120 of the adjacent heat dissipation units 100 are connected to each other to continuously extend in the longitudinal direction of the sheet body 11. A tube groove 130 for mounting the heat exchange tubes is formed between the heat transfer sections 110 of the adjacent heat dissipation units 100, The heat transfer section 110 is provided with a first water guiding rib 111. The first side section 120 has a corrugated portion 113, and at least a portion of the first water guiding rib 111 is in contact with the corrugated portion 113.

The longitudinal direction of the sheet 11 is as shown by the arrow A in Fig. 1, and the lateral direction of the sheet 11 is as shown by the arrow B in Fig. 1, and the vertical direction is determined by the vertical direction when the heat exchanger having the fins 10 is normally used.

According to the fin 10 of the embodiment of the present invention, by dividing the heat dissipating unit 100 into the first side section 120 and the heat transfer section 110, the heat transfer section 110 is provided with a first water guiding rib 111, the first side section A corrugated portion 113 is formed on the 120, at least a portion of the first water guiding rib 111 is in contact with the corrugated portion 113, and a corrugated portion 113 is formed on the first side portion 120, and the corrugated portion 113 forms a downwardly extending flow guiding structure, which can be first The condensed water formed on the side section 120 is quickly discharged downward, and at least one part The first water guiding rib 111 is in contact with the corrugated portion 113, and the condensed water on the heat transfer portion 110 can be guided to the first side portion 120 to prevent excessive condensed water from accumulating in the tube groove 130. Around the heat exchange tube, the drainage performance is improved, thereby greatly reducing the probability of frost clogging and improving the heat exchange performance.

Moreover, the first water guiding rib 111 is convex with respect to the surface of the heat transfer section 110, and the surface area of the fin 10 is increased. Under the same heat exchange amount, the thickness of the frost layer can be reduced, the air resistance is reduced, and the first The water guiding ribs 111 enhance the turbulence of the air. Further, the first water guiding rib 111 can reinforce the rigidity of the fin 10, so that the fin 10 is not easily deformed.

Therefore, the fin 10 according to the embodiment of the present invention can improve the elimination performance of the condensed water and reduce the clogging of the frost layer, thereby improving the heat exchange efficiency.

As shown in FIGS. 1 to 6, a fin 10 according to an embodiment of the present invention includes a sheet body 11 including a plurality of heat dissipating units 100 arranged in the longitudinal direction of the sheet body 11. Each heat dissipating unit 100 includes a heat transfer section 110 and a first side section 120 arranged along a lateral direction of the sheet body 11. The heat transfer section 110 is provided with a first water guiding rib 111, and a first water guiding rib 111 extends obliquely downward from the heat transfer section 110 toward the lateral direction of the first side section 120 with respect to the sheet body, and the corrugated portion 113 is formed on the first side section 120, and the first water guiding rib 111 faces the first side The end of the section 120 is just in contact with the corrugated portion 113.

In the fin 10 of the embodiment of the present invention, the end of the first water guiding rib 111 facing the first side section 120 is just in contact with the corrugated portion 113, and the contact position of the first water guiding rib 111 with the corrugated portion 113 will be The condensed water on the first water guiding rib 111 is guided to the first side section 120, thereby discharging the condensed water on the heat transfer section 110 through the first side section 120, which not only facilitates the improvement of the condensed water removal performance, Moreover, the processing is convenient. On the other hand, the heat dissipation unit 100 is provided with a first water guiding rib 111 extending downward from the heat transfer section 110 toward the first side section 120 with respect to the lateral direction of the sheet body 11, obliquely downward. The extended first water guiding rib 111 facilitates directing the condensed water on the heat transfer section 110 into the corrugated portion 113 of the first side section 120, improving the condensed water rejection performance.

Further, as shown in FIG. 7, at least a portion of the windward side portion of the first water guiding rib 111 extends into the first side section 120, and the first water guiding rib 111 and the lateral direction of the sheet body 11 are sandwiched. The angle is 10° ≤ α ≤ 70°.

Within this angular range, the first water guiding rib 111 may extend to the first side section 120, and the surface area of the heat transfer section 110 above the first water guiding rib 111 is not less than the total surface area of the heat transfer section 110. Half, such that more than half of the condensed water in the heat transfer section 110, that is, the condensed water on the fins 10 above the first water guiding rib 111, can flow along the first water guiding rib 111 to the windward direction of the first water guiding rib 111. The side portions, which in turn are directed onto the first side section 120, facilitate drainage of condensed water.

In other words, not only can part of the condensed water remain on the first water guiding rib 111, the air side wind resistance is ensured to ensure the heat exchange efficiency, and in the low temperature condition, the condensed water is prevented from rapidly frosting, the frosting period is extended, and the heat exchange is increased. The heat exchanger is efficient, and it can be ensured that the windward side portion of the first water guiding rib 111 can extend to the first side section 120.

As shown in FIG. 2, the heat transfer section 110 is provided with a first water guiding rib 111, and the first water guiding rib 111 is from the heat transfer area. The segment 110 extends obliquely downward toward the first side section 120 with respect to the lateral direction of the sheet body, and the entire first side section 120 forms a corrugated portion 113, one side of the corrugated portion 113 extending just to the heat transfer portion 110 and the first portion The boundary of the side section 120, that is, the line of the end of the tube groove 130 for mounting the heat exchange tube toward the first side section 120, the lower end of the first water guiding rib 111 extends to the heat transfer section The boundary between the 110 and the first side section 120 is in contact with the corrugated portion 113.

As shown in FIG. 3, the heat transfer section 110 is provided with two first water guiding ridges 111 extending obliquely downward from the heat transfer section 110 toward the first side section 120, and two first water guiding convexities. The strips 111 are arranged along the longitudinal direction of the sheet body 11 and spaced apart from each other by a distance, a corrugated portion 113 is formed on the first side section 120, and the corrugated portion 113 on the first side section 120 extends onto the heat transfer section 110, The lower ends of the first water guiding ribs 111 are in contact with the portions of the corrugated portion 113 of the first side section 120 that extend onto the heat transfer section 110, that is, the lower ends of the two first water guiding ribs 111 are exactly the same. The corrugated portion 113 on the hot section 110 is in contact. Moreover, the lower ends of the two first water guiding ribs 111, that is, the end portions of the first water guiding ribs 111 facing the first side section 120 are gradually in the direction toward the first side section 120, respectively. The contraction section 115 is formed to be smaller, and the end of the contraction section 115 is just in contact with the bellows portion 113. The corrugated portion 113 of the embodiment of the present invention extends into the heat transfer section 110, increasing the heat exchange area of the heat transfer section 110, and further, the end of the first water guiding rib 111 facing the end of the first side section 120 The cross-sectional area tapers in a direction toward the first side section 120 to form a constricted section 115 that facilitates directing condensate on the heat transfer section 110 to the corrugated portion 113 for condensed water. exclude.

As shown in FIG. 4, the heat transfer section 110 is provided with two first water guiding ridges 111 extending obliquely downward from the heat transfer section 110 toward the first side section 120, and two first water guiding convexities. The strips 111 are arranged along the longitudinal direction of the sheet body 11 and abut each other, and the cross-sectional area of the ends of the two first water guiding strips 111 facing the first side section 120 is in the direction toward the first side section 120. The contraction section 115 is formed to be tapered, and the contraction sections 115 of the two first water guiding ribs 111 abut each other to form an entire constricted section 115. A corrugated portion 113 is formed on the first side section 120, and the corrugated portion 113 extends onto the heat transfer portion 110. The end portion of the constricted portion 115 of the first water guiding rib 111 is exactly opposite to the corrugated portion 113 of the first side portion 120. A portion of the contact extending to the heat transfer section 110, that is, the end of the contraction section 115 of the first water guiding rib 111 is just in contact with the corrugated portion 113 on the heat transfer section 110. Moreover, the edge of the pipe groove is provided with a positioning structure, and the positioning structures on the edges of the upper and lower pipe grooves of the same heat transfer section are mutually staggered, and the positioning structure is an arc structure, and the arc structure is curled away from the pipe groove. The plurality of first water guiding ribs 111 of the embodiment of the present invention are arranged along the longitudinal direction of the sheet body 11 and abut each other, and the contracting sections 115 of the plurality of first water guiding ribs 111 abut each other to form a whole contracting section 115. The plurality of first water guiding ribs 111 adjacent to each other can increase the area of the first water guiding rib 111, thereby increasing the heat exchange area of the fin 10, and guiding more condensed water to the first side section. 120, and a plurality of constricted sections 115 abut each other to form an entire constricted section 115, which not only facilitates guiding the condensed water on the plurality of first water guiding ribs 111 together to the corrugated portion 113, but also facilitates processing.

As shown in FIG. 5, the heat transfer section 110 is provided with two first water guiding ridges 111 extending obliquely downward from the heat transfer section 110 toward the first side section 120, and two first water guiding convexities. The strips 111 are arranged along the longitudinal direction of the sheet body 11 and abut each other, and the cross-sectional area of the ends of the two first water guiding strips 111 facing the first side section 120 is toward the first side section 120. The contraction section 115 is gradually reduced in the direction, and the contraction sections 115 of the two first water guiding ribs 111 abut each other to form an entire constricted section 115. The first side section 120 has a straight section, the straight section is located between the corrugated portion 113 and the heat transfer section 110, and the first water guiding rib 111 extends to the straight section of the first side section 120, and The end of the constricted section 115 of a water guiding rib 111 is just in contact with the corrugated portion 113 on the first side section 120.

As shown in FIG. 6, the heat transfer section 110 is provided with two first water guiding ridges 111 extending obliquely downward from the heat transfer section 110 toward the first side section 120, and two first water guiding convexities. The strips 111 are arranged along the longitudinal direction of the sheet body 11 and abut each other, and the cross-sectional area of the ends of the two first water guiding strips 111 facing the first side section 120 is in the direction toward the first side section 120. The contraction section 115 is formed to be tapered, and the contraction sections 115 of the two first water guiding ribs 111 abut each other to form an entire constricted section 115. A corrugated portion 113 is formed on the first side section 120, and the corrugated portion 113 extends onto the heat transfer portion 110. The end portion of the constricted portion 115 of the first water guiding rib 111 is exactly opposite to the corrugated portion 113 of the first side portion 120. A portion of the contact extending to the heat transfer section 110, that is, the end of the contraction section 115 of the first water guiding rib 111 is just in contact with the corrugated portion 113 on the heat transfer section 110. The end of the heat transfer section 110 remote from the first side section 120 forms a protrusion 140 whose height in the longitudinal direction of the sheet body 11 is smaller than the height of the heat transfer section 110 in the longitudinal direction of the sheet body 11 and protrudes The portion 140 extends beyond the tube groove 130 for mounting the heat exchange tube. When the heat exchange tube is installed in the tube groove 130, the protrusion portion 140 extends outside the heat exchange tube. The height of the protrusion 140 in the longitudinal direction of the sheet body 11 is smaller than the height of the heat transfer section 110, so that a flare is formed outside the tube groove 130 to facilitate the installation of the heat exchange tube, and the protrusion 140 extends beyond the tube groove 130. Not only the heat exchange area of the fins 10 is increased, but also the condensed water on the projections 140 is prevented from accumulating on the heat exchange tubes installed in the tube grooves 130.

In summary, the first water guiding ribs 111 may be one or plural, and the plurality of first water guiding ribs 111 may be spaced apart by a certain distance or may be adjacent to each other, and the first water guiding rib 111 may be adjacent to each other. The lower end may not shrink, may be fully contracted to form a plurality of constricted sections 115, or partially contracted to form a plurality of constricted sections 115. Of course, according to the area of the heat transfer section 110, the first water guiding rib 111 of a proper area ratio is provided to optimize the drainage and heat exchange effect, and the lower end of the first water guiding rib 111, that is, the first water guiding convexity. The cross-sectional area of the end of the strip 111 facing the first side section 120 tapers in a direction toward the first side section 120 to form a constricted section 115, which is more advantageous for guiding the condensed water on the heat transfer section 110. Flow is passed to the first side section 120 for exclusion.

In some embodiments of the present invention, as shown in FIGS. 7-20, the fin 10 according to an embodiment of the present invention includes a sheet body 11 including a plurality of heat dissipating units arranged along the longitudinal direction of the sheet body 11. 100. Each heat dissipating unit 100 includes a heat transfer section 110 and a first side section 120 arranged along a lateral direction of the sheet body 11. The heat transfer section 110 is provided with a first water guiding rib 111, and a first water guiding rib 111 extends obliquely downward from the heat transfer section 110 toward the first side section 120, and a corrugated portion 113 is formed on the first side section 120, and at least a portion of the first water guiding rib 111 is in contact with the corrugated portion 113, and Specifically, an end of the first water guiding rib 111 facing the first side section 120 extends into the corrugated portion 113.

According to the fin 10 of the embodiment of the present invention, by dividing the heat dissipation unit 100 into the first side section 120 and the heat transfer section 110, the heat dissipation unit 100 is provided with respect to the first side section 120 from the heat transfer section 110 The lateral inclination of the sheet 11 is downwardly extended The first water guiding rib 111 is extended, and the corrugated portion 113 is formed on the first side section 120. At least a part of the first water guiding rib 111 extends into the corrugated portion 113. On the one hand, the first side section 120 is corrugated. The portion 113, the corrugated portion 113 forms a downwardly extending flow guiding structure capable of rapidly discharging the condensed water formed on the first side section 120 downward, and on the other hand, the heat dissipating unit 100 is provided with a lateral direction with respect to the sheet body 11. a first water guiding rib 111 extending obliquely downward, the first water guiding rib 111 extending into the corrugated portion 113, the first water guiding rib 111 guiding the condensed water on the heat transfer portion 110 to the first side region In the corrugated portion 113 of the segment 120, the condensed water is discharged downward along the corrugated portion 113, so that excessive condensed water is accumulated to accumulate above the heat exchange tube inserted in the tube groove 130, thereby improving drainage performance and further reducing the knot. The chance of frost blockage improves heat transfer performance.

In some embodiments of the present invention, the first water guiding rib 111 is one. As shown in FIG. 7, the first water guiding rib 111 is disposed on the heat transfer section 110, and the first water guiding rib 111 is The heat transfer section 110 extends obliquely downward toward the first side section 120, the entire first side section 120 forms a corrugated portion 113, one side of which extends just to the heat transfer section 110 and the first side section The boundary of 120, that is, the line of the end of the tube groove 130 facing the first side section 120, the end of the first water guiding rib 111 facing the first side section 120 extends into the corrugated portion 113, That is, the lower end of the first water guiding rib 111 extends to the outside of the end of the pipe groove 130 to intersect the corrugated portion 113.

In some embodiments of the present invention, the first water guiding ribs 111 may be plural, as shown in FIGS. 8-10, and the first water guiding ribs 111 are two. As shown in FIG. 8, the heat transfer section 110 is provided with two first water guiding ridges 111 extending obliquely downward from the heat transfer section 110 toward the first side section 120, and two first water guiding convexities. The strips 111 are arranged along the longitudinal direction of the sheet body 11 and spaced apart from each other by a certain distance. A corrugated portion 113 is formed on the first side section 120, and one side of the corrugated portion 113 extends onto the heat transfer section 110, and the two first water guides are formed. The lower ends of the ribs 111 extend into the corrugations 113 on the heat transfer section 110, respectively. Moreover, the lower ends of the two first water guiding ribs 111, that is, the end portions of the first water guiding ribs 111 facing the first side section 120 are gradually in the direction toward the first side section 120, respectively. The smaller portion forms a contracted section 115, and the end of the contracted section 115 extends into the corrugated portion 113.

It should be noted that as long as a part of the lower end of the first water guiding rib 111 extends to the corrugated portion 113, most of the condensed water is guided to the corrugated portion 113 to be discharged downward, in particular, the first water guiding rib 111 located below. Extending into the corrugated portion 113 can guide more condensed water to the corrugated portion 113, not all of the first water guiding ribs 111 must extend into the corrugated portion 113, and a plurality of first water guiding ridges 111 They can be spaced apart by a certain distance or adjacent to each other without affecting the discharge of condensed water. Moreover, the cross-sectional area of the end of the first water guiding rib 111 facing the first side section 120 preferably tapers in a direction toward the first side section 120 to form a contracting section 115, and the contracting section 115 extends to In the corrugated portion 113, of course, the lower end of the first water guiding rib 111 may not be contracted and directly extend into the corrugated portion 113, except that the constricted portion 115 facilitates the flow of the condensed water into the corrugated portion 113, and the constricted portion 115 extends. It is also easier to process the corrugated portion 113.

As shown in FIGS. 9-10, the heat transfer section 110 is provided with two slopes from the heat transfer section 110 toward the first side section 120. a first water guiding rib 111 extending downwardly from the ground, two first water guiding ribs 111 are arranged along the longitudinal direction of the sheet body 11 and abutting each other, and the first water guiding ribs 111 face the first side area The cross-sectional area of the end of the segment 120 tapers in a direction toward the first side section 120 to form a constricted section 115, and the constricted sections 115 of the two first water guiding ribs 111 abut each other to form an entire constricted section 115. . A corrugated portion 113 is formed on the first side section 120, and one side of the corrugated portion 113 extends just to the boundary between the heat transfer section 110 and the first side section 120, and the constricted section 115 of the first water guiding rib 111 extends to In the corrugated portion 113, a positioning structure 114 is disposed on the edge of the tube groove 130 for mounting the heat exchange tube, and the positioning structure 114 includes two portions perpendicular to each other. It should be noted that the first water guiding ribs 111 adjacent to each other may be plural, not necessarily two.

In some embodiments of the invention, the position of the first water guiding rib 111 extending to the corrugated portion may be on the first side section 120 or on the heat transfer section 110.

As shown in FIG. 11, the heat transfer section 110 is provided with two first water guiding ridges 111 extending obliquely downward from the heat transfer section 110 toward the first side section 120 with respect to the lateral direction of the sheet body. The first water guiding ribs 111 are arranged along the longitudinal direction of the sheet body 11 and abut each other, and the cross-sectional areas of the ends of the two first water guiding ribs 111 facing the first side section 120 are toward the first side. The direction of the section 120 is gradually reduced to form a constricted section 115, and the constricted sections 115 of the two first water guiding ribs 111 abut each other to form an entire constricted section 115. A corrugated portion 113 is formed on the first side section 120, and the corrugated portion 113 continuously extends in the longitudinal direction along the extending direction of the first side section 120, and the corrugated portion 113 extends laterally to the heat transfer section 110, the first guide The constricted section 115 of the water rib 111 extends into the corrugated portion 113 on the heat transfer section 110. The corrugated portion 113 of the embodiment of the present invention extends into the heat transfer section 110, increasing the heat exchange area of the heat transfer section 110, and further, the end of the first water guiding rib 111 facing the end of the first side section 120 The cross-sectional area tapers in a direction toward the first side section 120 to form a constricted section 115 that facilitates directing condensate on the heat transfer section 110 to the corrugated portion 113 for condensed water. exclude.

As shown in FIG. 12, the heat dissipation unit 100 is provided with two first water guiding ridges 111 extending obliquely downward from the heat transfer section 110 toward the first side section 120, and the two first water guiding ridges 111. Arranged along the longitudinal direction of the sheet body 11 and abutting each other, the cross-sectional area of the ends of the two first water guiding ribs 111 facing the first side section 120 gradually changes in the direction toward the first side section 120. The constricted section 115 is formed small, and the constricted sections 115 of the two first water guiding ribs 111 abut each other to form an entire constricted section 115. Most of the first water guiding ribs 111 are distributed on the heat transfer section 110, and a small portion of the first water guiding ribs 110 are distributed on the first side section 120. A portion of the first side section 120 that is away from the heat transfer section 110 is corrugated to form a corrugated portion 113, that is, a straight section between the corrugated portion 113 on the first side section 120 and the heat transfer section 110, The constricted section 115 of a water guiding rib 111 extends into the corrugated portion 113, that is, the first water guiding rib 111 extends into the corrugated portion 113 on the first side section 120.

As shown in FIGS. 13-14, the heat transfer section 110 is provided with two first water guiding ridges 111 extending obliquely downward from the heat transfer section 110 toward the first side section 120, two first The water guiding ribs 111 are arranged along the longitudinal direction of the sheet body 11 and abut each other, and the cross-sectional area of the ends of the two first water guiding ribs 111 facing the first side section 120 is toward the first side area. The direction of the segment 120 gradually becomes smaller to form a constricted section 115, and the constricted sections 115 of the two first water guiding ribs 111 abut each other to form an entire constricted section 115. A corrugated portion 113 is formed on the first side section 120, and the corrugated portion 113 extends onto the heat transfer section 110, and the end of the constricted section 115 of the first water guiding rib 111 extends to the corrugated portion 113 on the heat transfer section 110. Inside. The end of the heat transfer section 110 remote from the first side section 120 forms a protrusion 140 whose height in the longitudinal direction of the sheet body 11 is smaller than the height of the heat transfer section 110 in the longitudinal direction of the sheet body 11 and protrudes The portion 140 extends beyond the tube slot 130 for mounting the heat exchange tubes. Moreover, the positioning structure 114 is disposed on the edge of the pipe groove 130, and the positioning structures 114 on the edges of the upper and lower pipe grooves 130 of the same heat transfer section 110 are mutually offset, and the positioning structure 114 is an arc structure, and the arc structure is facing away from the pipe. The direction of the groove 130 is curled. The height of the protrusion 140 in the longitudinal direction of the sheet body 11 is smaller than the height of the heat transfer section 110, so that a flare is formed outside the tube groove 130 to facilitate the installation of the heat exchange tube, and the protrusion 140 extends to be used for mounting heat exchange. Outside the tube groove 130 of the tube, not only the heat exchange area of the fin 10 is increased, but also the condensed water on the protrusion 140 is prevented from accumulating on the heat exchange tube installed in the tube groove 130.

In some embodiments of the invention, the constricted section 115 of the first water guiding rib 111 may be symmetrically contracted or asymmetrically contracted.

As shown in FIG. 9 to FIG. 14 , the heat dissipation unit 100 is provided with two first water guiding ridges 111 extending obliquely downward from the heat transfer section 110 toward the first side section 120 , and two first water guiding bodies. The ribs 111 are arranged along the longitudinal direction of the sheet body 11 and abut each other, and the cross-sectional area of the ends of the two first water guiding ribs 111 facing the first side section 120 is in the direction toward the first side section 120. The upper portion gradually becomes smaller to form the contraction section 115, and the contraction sections 115 of the two first water guiding ribs 111 abut each other to form an entire contraction section 115, and the edge of the contraction section 115 contracts toward the center line of the first water guiding rib 111. In other words, the constricted section of the first water guiding rib 111 is symmetrically contracted along its central axis and finally concentrated to a point, thereby improving the guiding of the condensed water and thereby improving the condensed water removal performance.

Of course, as shown in FIG. 15, the constricted section 115 of the first water guiding rib 111 may also be asymmetrically contracted along its central axis, that is, the inclination of the both side edges of the constricted section 115 with respect to the center line of the first water guiding rib 111. The angles are different and eventually converge to one point.

Optionally, the two sides of the constricted section 115 of the first water guiding rib 111 may not eventually converge to a point, wherein the constricted section 115 of the first water guiding rib 111 may be along the center of the first water guiding rib 111 The axis is symmetrically contracted and can also be asymmetrically contracted. As shown in FIG. 16, the constricted section of the first water guiding rib 111 is asymmetrically contracted along the central axis of the first water guiding ridge and the both side edges of the constricted section of the first water guiding rib 111 do not eventually converge to a point. And the end of the constricted section of the first water guiding rib may be parallel to the longitudinal direction of the sheet 11.

In some embodiments of the present invention, as shown in FIGS. 17-18, the heat transfer section 110 is further provided with an auxiliary protrusion 112, and the auxiliary protrusion 112 is located above the first water guiding rib 111. By further providing the auxiliary convex portion 112, the surface area of the fin 10 can be further increased, and the air turbulence can be further increased, and the thickness of the frost layer is further reduced at the same heat exchange amount.

As shown in FIG. 17 to FIG. 18, the heat dissipation unit 100 is provided with two first water guiding ridges 111 extending obliquely downward from the heat transfer section 110 toward the first side section 120, and two first water guiding bodies. The ribs 111 are arranged along the longitudinal direction of the sheet body 11 and abut each other, and the cross-sectional area of the ends of the two first water guiding ribs 111 facing the first side section 120 is in the direction toward the first side section 120. The upper portion is tapered to form a constricted portion 115, and the constricted portions 115 of the two first water guiding ribs 111 abut each other to form an entire constricted portion 115, and the end portions of the constricted portion 115 converge to a point. The first water guiding rib 111 is disposed on the heat transfer section 110. The first side section 120 is provided with a corrugated portion 113. The constricted section 115 of the first water guiding rib 111 extends into the corrugated portion 113, and the heat transfer area An auxiliary protrusion 112 is provided above the side of the segment 110 adjacent to the first side section 120.

Alternatively, as shown in FIG. 17, the auxiliary convex portion 112 may be circular and a plurality of rows and columns arranged in the lateral direction and the longitudinal direction of the sheet body 11. As shown in FIG. 18, the auxiliary convex portions 112 may be elongated and spaced apart in the longitudinal direction of the first water guiding ribs 111. The longitudinal direction of the auxiliary convex portions 112 and the longitudinal direction of the sheet body 11 are constant. The angle, specifically, the longitudinal direction of the auxiliary convex portion 112 is perpendicular to the longitudinal direction of the first water guiding rib 111. .

It will be understood by those skilled in the art that the auxiliary protrusions 112 may also have other shapes, and other arrangements may also be employed.

According to some embodiments of the present invention, as shown in FIGS. 19-20, the projection of the first water guiding rib 111 on a plane orthogonal to the longitudinal direction of the sheet body 11 in the lateral direction of the sheet body 11 is w3. The width of the heat transfer section 110 in the lateral direction of the sheet body 11 is w2, and the sum of the widths of the heat transfer section 110 and the first side section 120 in the lateral direction of the sheet body 11 is w1, where w2/2 ≤ w3 ≤ (w1 + w2) / 2. In this way, the guiding amount of the first water guiding rib 111 to the condensed water can be ensured, the effect of enhancing the drainage can be achieved, and the processing difficulty can be reduced.

Further, the projection of the contraction section 115 of the first water guiding rib 111 on a plane orthogonal to the longitudinal direction of the sheet body 11 in the lateral direction of the sheet body 11 is w4, where 0 ≤ w4 ≤ w3/2.

Here, when the cross-sectional area of the windward side portion of the first water guiding rib 111 gradually becomes smaller toward the first side section 120, a contraction section 115 is formed, 0 < w4 ≤ w3/2. Thereby, the surface area of the first water guiding rib 111 can be increased, thereby ensuring the surface area of the fin 10 and the turbulence effect, thereby improving the heat exchange capability.

Further, the length of the portion of the bellows portion 113 extending to the heat transfer portion 110 in the lateral direction of the sheet body 11 is w5, where w5 ≤ 0.5w1, w4 ≤ 0.9w1. The portion of the bellows portion 113 that extends onto the heat transfer section 110 cannot exceed half of the length of the heat transfer section 110 in the lateral direction of the sheet body 11, and the excessive extension of the bellows portion 113 into the heat transfer section 110 will affect the discharge of the condensed water. The length of the constricted section 115 is also not too long, and the excessively long constricted section 115 reduces the heat exchange area of the fin 10 compared to the constricted section 115 of a moderate length, and only when the above formula is satisfied, the fin 10 can be changed. The hot area facilitates the discharge of condensed water.

In some embodiments of the present invention, as shown in FIGS. 9-10, the first water guiding rib 111 has a triangular cross section, and the cross section of the first side section 120 along the lateral direction of the sheet body 11 is corrugated. This not only facilitates rapid flow of condensate on the first water guiding rib 111 to the end facing the first side section 120, but also facilitates the passage of the first water guiding rib 111 from the first water guiding rib 111. The condensed water flowing to the first side section 120 at the end quickly discharges the fins 10 along the corrugated portion 113.

Advantageously, in order to facilitate the processing of the first water guiding rib 111, the first water guiding rib 111 is formed by a part of the stamping sheet 11, which can reduce the cost, reduce the weight of the fin 10, and increase the fin 10 Surface area.

Further, as shown in FIG. 1 to FIG. 20, at least one lateral edge of the heat transfer section 110 is provided with a positioning structure 114. When the plurality of fins 10 are applied to the heat exchanger, the adjacent fins 10 are positioned. The structure 114 defines the distance between the two to facilitate assembly and to ensure stability of the distance between adjacent fins 10.

As shown in FIG. 14, the fin 10 according to the embodiment of the present invention is provided with a positioning structure 114. The positioning structure 114 is disposed on the edge of the pipe groove 130, and the positioning structure 114 is an arc structure, and the arc structure faces away from the pipe groove 130. The direction is curled. In practical applications, a plurality of fins 10 are stacked, wherein an outer surface of the arc-shaped structure of one of the fins 10 abuts the fin-like body 11 adjacent thereto, so that the fins 10 are connected by a curved structure. Together. The positioning structure 114 adopts an arc structure, and the elastic arc structure is connected with the sheet body 11 of the adjacent fins 10, so that the two are in close contact, thereby improving the anti-corrosion performance, and the arc-shaped structure is only partially in the tube groove 130. The heat exchange tubes are in contact with each other, thereby reducing the frictional resistance when the fins 10 are mounted, facilitating installation and improving production efficiency.

In some embodiments of the present invention, as shown in FIG. 21, each of the heat dissipation units 100 further includes a second side section 150, and the second side section 150 is located on the leeward side with respect to the heat transfer section 110, and the heat transfer area A second water guiding rib 116 is further disposed on the segment 110. The second water guiding rib 116 may extend obliquely downward from the heat transfer section 110 toward the second side section 150 with respect to the lateral direction of the sheet body 11, and the leeward end of the second water guiding rib 116 may extend to the second Inside the side section 150. Thereby, the first water guiding rib 111 can quickly guide the condensed water to the first side section 120 and be discharged from the first side section 120, and the second water guiding rib 116 can quickly guide the condensed water to the second side. The section 150 is discharged from the second side section 150, further improving the condensed water removal performance and further reducing the chance of frost clogging.

Optionally, the body 11 is axisymmetric with respect to the longitudinal centerline of the heat transfer section 110. In other words, the first side section 120 and the second side section 150 may have a symmetrical structure with respect to the longitudinal centerline axis of the heat transfer section 110, and the first water guiding rib 111 and the second water guiding rib 116 may have a relative The axis of the heat transfer section 110 is axisymmetric.

A heat exchanger according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 22, a heat exchanger according to an embodiment of the present invention includes a first header (not shown), a second header (not shown), a plurality of fins, and a heat exchange tube. 20.

The fins are fins 10 according to the above-described embodiment of the present invention, and the fins 10 are arranged spaced apart from each other between the first header and the second header. Two ends of the heat exchange tube 20 are respectively connected to the first header and the second header, and the heat exchange tubes 20 are respectively fitted in the tube groove 130. Wherein, the heat exchange tube 20 can be a flat tube.

According to the heat exchanger of the embodiment of the present invention, by using the fin 10 according to the above embodiment of the present invention, there is an advantage that the condensed water has good exclusion performance, is less prone to frost clogging, and has high heat exchange efficiency.

In some embodiments of the present invention, as shown in FIG. 23, in order to further improve the heat exchange efficiency of the heat exchanger, The fins 10 are divided into a first set of fins 30 and a second set of fins 40, and the heat exchange tubes 20 are divided into a first set of heat exchange tubes 50 and a second set of heat exchange tubes 60. The first set of heat exchange tubes 50 are respectively fitted in the tube slots 130 of the first set of fins 30, and the second set of heat exchange tubes 60 are respectively fitted in the tube slots 130 of the second set of fins 40. The first set of fins 30 are spaced apart from each other along the length direction of the first set of heat exchange tubes 50 between the first header and the second header, and the second set of fins 40 are along the second The longitudinal direction of the group heat exchange tubes 60 are spaced apart from each other between the first header and the second header, and the first set of fins 30 and the second set of fins 40 are along the first The radial arrangement of the header and the second header, in other words, when the heat exchange tube 20 is a flat tube, the first set of fins 30 and the second set of fins 40 along the first set of heat exchange tubes 50 The second group of heat exchange tubes 60 are spaced apart in the width direction.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In this specification, a schematic representation of the above terms It is not necessary to be directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A fin characterized by comprising a sheet body, the sheet body comprising a plurality of heat dissipating units arranged along a longitudinal direction of the sheet body, each heat dissipating unit including a heat transfer section arranged along a lateral direction of the sheet body and a first a side section, the first side section is located on the windward side with respect to the heat transfer section, and the first side sections of the adjacent heat dissipation unit are connected to each other to continuously extend in the longitudinal direction, adjacent to the heat dissipation unit a tube groove is formed between the heat transfer sections, the heat transfer section is provided with a first water guiding ridge, the first side section has a corrugated portion, and at least a part of the first water guiding rib is The corrugated portion is in contact.
The fin according to claim 1, wherein at least a portion of said first water guiding ridge is obliquely inclined from said heat transfer portion toward said first side portion with respect to a lateral direction of said sheet body Under the extension.
The fin according to claim 2, wherein an angle between the first water guiding ridge and a lateral direction of the sheet is 10° ≤ α ≤ 70°.
The fin according to claim 2, wherein a corrugated portion on the first side section extends onto the heat transfer section, at least a portion of the first water guiding rib and the first A portion of the corrugated portion of one side section that extends to the heat transfer section contacts.
The fin according to claim 2, wherein at least a portion of the windward side portion of the first water guiding rib extends into the first side section.
The fin according to claim 5, wherein said first side section has a straight section, said straight section being located between said corrugated portion and said heat transfer section, said first A water guiding rib extends onto the straight section, and at least a portion of the first water guiding rib is in contact with a corrugated portion on the first side section.
The fin according to claim 5, wherein a projection of the first water guiding ridge on a plane orthogonal to a longitudinal direction of the sheet body has a length w3 in a lateral direction of the sheet body, a width of the heat transfer section in a lateral direction of the sheet body is w2, and a sum of widths of the heat transfer section and the first side section in a lateral direction of the sheet body is w1, wherein w2 /2 ≤ w3 ≤ (w1 + w2)/2.
The fin according to any one of claims 1 to 7, wherein a cross-sectional area of the end of the first water guiding ridge facing the first side section is in a direction toward the first side section The upper portion is tapered to form a constricted portion, at least a portion of which is in contact with the corrugated portion.
The fin according to claim 8, wherein a projection of said first water guiding rib on a plane orthogonal to a longitudinal direction of said sheet body has a length w3 in a lateral direction of said sheet body, The projection of the constricted section of the first water guiding rib on a plane orthogonal to the longitudinal direction of the sheet has a length w4 in the lateral direction of the sheet, wherein 0 ≤ w4 ≤ w3/2.
A fin according to any of claims 1-8, wherein at least a portion of the first water guiding rib extends into the corrugated portion.
The fin according to claim 10, wherein the first water guiding rib faces the first side section The cross-sectional area of the end portion tapers in a direction toward the first side section to form a constricted section, at least a portion of which extends into the corrugated portion.
The fin according to claim 11, wherein the first water guiding ridges are at least two, and the at least two first water guiding ribs are arranged in the longitudinal direction of the heat dissipating unit and abut each other The constricted sections of the at least two first water guiding ribs abut each other.
A fin according to any one of claims 1 to 10, wherein the first water guiding rib has a triangular cross section.
The fin according to any one of claims 1 to 10, wherein the heat transfer section is further provided with an auxiliary convex portion, and the auxiliary convex portion is located in the windward direction with respect to the first water guiding rib side.
The fin according to any one of claims 1 to 10, wherein an end of the heat transfer section remote from the first side section forms a projection, the projection being in the longitudinal direction of the sheet The height is smaller than the height of the heat transfer section in the longitudinal direction of the sheet, and the protrusion extends outside the tube groove for mounting the heat exchange tube.
The fin according to any one of claims 1 to 10, wherein a positioning structure is provided on an edge of the pipe groove, and the positioning structure is an arc structure, and the arc structure faces away from the pipe. The direction of the groove is curled.
The fin according to any one of claims 1 to 13, wherein each fin unit further comprises a second side section, the second side section being located on the leeward side with respect to the heat transfer section A second water guiding rib is further disposed on the heat transfer section.
The fin according to claim 17, wherein the sheet is axisymmetric with respect to a longitudinal centerline of the heat transfer section.
A heat exchanger, comprising:

a first header and a second header;

a plurality of fins, the fins being the fins according to any one of claims 1 to 18, the fins being spaced apart from each other at the first header and the second header between;

a plurality of heat exchange tubes, wherein two ends of the heat exchange tubes are respectively connected to the first header and the second header, and the heat exchange tubes are respectively fitted in corresponding tube slots of the fins.
The fin according to claim 19, wherein said plurality of fins are divided into a first set of fins and a second set of fins, said heat exchange tubes being divided into a first set of heat exchange tubes and a second set a heat exchange tube, the first set of heat exchange tubes are respectively fitted in the tube slots of the first set of fins, and the second set of heat exchange tubes are respectively fitted in the tube slots of the second set of fins,

The first set of fins are spaced apart from each other along the length direction of the first set of heat exchange tubes between the first header and the second header, the second set of fins Between the first header and the second header, spaced apart from each other along a length direction of the second set of heat exchange tubes, the first set of fins and the second set of fins The sheets are arranged at a radial interval along the first header and the second header.