Multi-section integrated fin

Abstract

The utility model discloses a multi-section integrated fin, and belongs to the technical field of air conditioning devices. The technical problems that in the prior art, a traditional V-shaped heat exchanger is poor in drainage and waste in heat exchange efficiency, the wind field of a centrifugal fan is uneven, the heat exchanger cannot be completely matched with the wind field, the wind field collaboration of the heat exchanger is poor, and the production efficiency is low are solved. A fin body is of an integrated structure, pipe holes allowing heat exchange pipes to penetrate through conveniently are distributed in the fin body, and the fin body is divided into an upper section area, a middle section area and a lower section area from top to bottom. The outer edge line OCL of the fin is formed by connecting a plurality of line segments and comprises a fin body main line segment, edge sealing line segments L7 and L9, a leeward side with the overall trend of the outer edge of the left side of the fin bending leftwards and a windward side with the overall trend of the outer edge of the right side of the fin bending leftwards. The connecting line of the midpoint of the L2 and the midpoint of the L5 is a fin reference line ROC1, and the number of holes located in the upper portion fin and the number of holes located in the lower portion fin of the fin reference line ROC1 are different.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning device technical field, concretely is a kind of multi-section integrated fin. BACKGROUND

[0002] Traditional V-shaped heat exchanger adopts two-piece heat exchange splicing scheme, and the splicing place is sealed by sealing strip, which has problems of poor drainage, waste of heat exchange efficiency, uneven wind field of centrifugal fan, and heat exchanger cannot fully adapt to wind field, and the heat exchange efficiency of heat exchanger is poor. The production efficiency of two independent sub-assemblies is low, and the production efficiency of integrated heat exchanger cannot be achieved.

[0003] The existing V-shaped heat exchanger fin cannot be integrally machined, and the process is complex and the sealing strip affects part of the heat exchange performance. The integrated fin is symmetrically designed, which cannot perfectly match the wind field heat exchange. The existing technical solution has high proportion of three-row heat exchanger, poor overall wind resistance and heat exchange synergy, and cannot achieve the balance of heat exchange efficiency and cost.

[0004] Evaporation condition, due to the high proportion of arc-shaped middle three rows and the wind guide effect of its fin, leading to poor condensate water drainage in the upper half, leading to increased wind resistance and decreased heat exchange coefficient, affecting the performance of wet condition. INVENTION CONTENTS

[0005] The utility model provides a kind of multi-section integrated fin for heat exchanger, which is provided with a fin body, and the fin body is integrally formed, and the fin body is provided with pipe holes for heat exchange tubes to pass through, and the fin body is divided into upper, middle and lower sections from top to bottom.

[0006] To achieve the above purpose, the utility model is implemented by the following technical solutions: the multi-section integrated fin for heat exchanger provided by the utility model is integrally formed, and the fin body is provided with pipe holes for heat exchange tubes to pass through, and the fin body is divided into upper, middle and lower sections from top to bottom.

[0007] The outer edge line OCL of the fin is connected by multiple line segments, including the main line segments L1, L2, L3, L4, L5, L6 and the edge line segments L7 and L9. The clockwise connection sequence of the main line segments and the edge line segments is: L1-L7-L4-L5-L6-L9-L3-L2. The leeward side of the left outer edge of the fin is curved to the left as a whole, and is composed of the main line segments L1, L2 and L3. The windward side of the right outer edge of the fin is also curved to the left as a whole, and is composed of the main line segments L4, L5 and L6.

[0008] Wherein, L1 and L2 intersect at point P1, L2 and L3 intersect at point P2, L4 and L5 intersect at point P3, L5 and L6 intersect at point P4; the fin area between P1, P2, P3 and P4 is the middle section area, the fin area above the line connecting P1 and P3 is the upper section area, and the fin area below the line connecting P2 and P4 is the lower section area.

[0009] The line connecting the midpoint of the main line segment L2 of the fin sheet body and the midpoint of L5 is the fin reference line ROC1, and the number of holes on the upper and lower parts of the fin located on the fin reference line ROC1 is different.

[0010] Preferably, the upper and lower ends of the right outer edge of the fin are chamfered structures, and the sealing edge lines L8 and L10 are the sealing edge sections of the upper and lower chamfered structures, respectively, L7-L8 forms the upper end sealing edge, and L10-L9 forms the lower end sealing edge.

[0011] Preferably, the length ratio of L1 to L4 is 1.189±10%; the length ratio of L3 to L6 is 1.159±10%;

[0012] The length ratio of the main line segment L2 to L1 is 0.529±10%, the length ratio of L2 to L3 is 0.457±10%, and the length ratio of L2 to L5 is 1.

[0013] Preferably, the direction from left to right along the reference line ROC1 is the first reference direction, the included angle α1 of L1 and the reference line ROC1 along the first reference direction is 40-45°, and the ratio of the included angle of L4 and the reference line ROC1 along the first reference direction to the included angle of L1 and the reference line ROC1 along the first reference direction is 1;

[0014] The included angle α2 of L2 and the reference line ROC1 along the first reference direction is 85-95°, and the ratio of the included angle of L5 and the reference line ROC1 along the first reference direction to the included angle of L2 and the reference line ROC1 along the first reference direction is 1;

[0015] The included angle α3 of L3 and the reference line ROC1 along the first reference direction is 40-45°, and the ratio of the included angle of L6 and the reference line ROC1 along the first reference direction to the included angle of L3 and the reference line ROC1 along the first reference direction is 1;

[0016] The extension lines of the main line segments L1 and L3 on the left outer edge of the fin intersect on the reference line ROC1, and the included angle α4 of the two extension lines is 80-90°.

[0017] Preferably, L5 is arranged using a vertical reference line ROC1, and the low-resistance proportion H2 / H of drainage is 0.25-0.3, wherein H2 is the height of the middle section area, and H is the overall height of the fin body.

[0018] Preferably, the distance between the left outer edge and the right outer edge of the fin is the width W of the fin, the maximum width Wmax is located between L2 and L5, the minimum width Wmin is located between L1 and L4 or between L3 and L6, and Wmin=(0.667±10%)Wmax;

[0019] The upper section area height H1 is 33.89%±10% of the overall height H of the fin, the middle section area height H2 is 26.82%±10% of the overall height H of the fin, and the lower section area height H3 is 39.29%±10% of the overall height H of the fin;

[0020] The ratio of the overall height H of the fin to the maximum width Wmax is 3.987±10%.

[0021] Preferably, each row of tube holes in each section area of the fin body is arranged at intervals, the tube row line formed by sequentially connecting the centers of each row of tube holes in the upper section area is parallel to L1 or L4, the tube row line formed by sequentially connecting the centers of each row of tube holes in the middle section area is parallel to L2 or L5, and the tube row line formed by sequentially connecting the centers of each row of tube holes in the lower section area is parallel to L3 or L6.

[0022] Preferably, the tube holes in each section area of the fin body are arranged in two rows or three rows;

[0023] The tube holes in the upper section area are arranged in two rows above ROC1, the tube holes in the middle section area are arranged in three rows through ROC1, and the tube holes in the lower section area are arranged in two rows below ROC1.

[0024] Preferably, the ratio of the distance D1 of the tube hole on the tube row line in the upper section area to the nearest main line segment to the tube hole diameter D is 1.1-1.7,

[0025] The ratio of the distance D2 of the tube hole on the tube row line in the middle section area to the nearest main line segment to the tube hole diameter D is 1.2-1.6,

[0026] The ratio of the distance D3 of the tube hole on the tube row line in the lower section area to the nearest main line segment to the tube hole diameter D is 1.2-1.6.

[0027] Preferably, the ratio of the center distance D4 between the two rows of tube holes in the upper section area and the lower section area to the tube hole diameter D is 2.82±10%,

[0028] The ratio of the center distance D5 between each row of tube holes in the middle section area to the tube hole diameter D is 2.78±10%;

[0029] The ratio of the shortest distance D6 from the center of the tube hole closest to the edge line segment to the edge line of the edge line segment to the tube hole diameter D is 1.25-1.55.

[0030] Preferably, the tube holes on the fin body adopt two tube distances, D7 and D8, D7 is 16-18mm, and D8 is 13-15mm, wherein the tube distance of the three-row tube hole region in the middle section region adopts D7 tube distance, and the tube distance of the two-row tube hole regions in the upper section region and the lower section region adopts D8 design.

[0031] The bottom region close to the water pan is provided with tube holes for facilitating the inclined insertion of heat exchange copper pipes, and the hole distance is D7.

[0032] The ratio of the shortest distance D6 from the center of the tube hole closest to the sealing edge line to the edge line of the sealing edge line to the diameter D of the tube hole is in the range of 1.25-1.55.

[0033] The utility model provides a kind of multi-section integrated fin. It has the following beneficial effects:

[0034] The multi-section integrated fin for heat exchanger of the utility model can improve production efficiency, and is suitable for heat exchange uneven heat exchange air field of air pipe machine, and the overall performance is more optimal.The heat exchanger is asymmetrically designed, and the number of holes in upper and lower sections is different, better adapts to the difference of air field, and realizes the performance of field synergy.

[0035] The middle section region is matched with the maximum wind speed region, and under the premise of ensuring the same number of holes, the overall design adopts double-row tube hole, to improve the maximum heat exchange efficiency. DRAWINGS

[0036] Figure 1 It is a structure schematic view of the multi-section integrated fin of the utility model;

[0037] Figure 2 It is a structure schematic view of the tube hole distribution structure of the multi-section integrated fin of the utility model;

[0038] Figure 3 It is a structure schematic view of the tube hole distribution and corresponding size marking structure of the multi-section integrated fin of the utility model;

[0039] Figure 4 It is a structure schematic view of the manufacturing structure of the multi-section integrated fin of the utility model formed by directly punching and cutting sheet material;

[0040] Figure 5 It is a structure schematic view of the multi-section integrated fin of the utility model according to use state.

[0041] In the figure: fin outer edge line OCL; along reference line ROC1; fin body main line segments L1, L2, L3, L4, L5, L6 and edge sealing line segments L7, L8, L9, L10; L1 and L2 intersect at point P1, L2 and L3 intersect at point P2, L4 and L5 intersect at point P3, and L5 and L6 intersect at point P4. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0043] Please refer to Figures 1-5 The utility model provides a technical scheme:

[0044] As Figures 1-2 The utility model provides a multi-section integral fin for heat exchanger, the fin body is integrated structure, the fin body is equipped with the pipe hole convenient for heat exchange pipe to pass, the fin body is divided into three section areas from top to bottom, namely upper section area, middle section area and lower section area.

[0045] The fin outer edge line OCL is connected by multiple line segments and comprises fin body main line segments L1, L2, L3, L4, L5, L6 and edge sealing line segments L7, L9, the upper and lower ends of the outer edge on the right side of the fin are respectively chamfered structures, the edge sealing lines L8 and L10 are the edge sealing sections of the upper and lower chamfered structures respectively, L7-L8 constitute the upper end edge sealing, and L10-L9 constitute the lower end edge sealing.

[0046] The clockwise connection sequence of the main line segments and the edge sealing line segments is: L1-L7-L8-L4-L5-L6-L10-L9-L3-L2; the leeward side of the outer edge on the left side of the fin is curved to the left as a whole, and is formed by the fin body main line segments L1, L2 and L3; the windward side of the outer edge on the right side of the fin is also curved to the left as a whole, and is formed by the fin body main line segments L4, L5 and L6; L4, L5 and L6 constitute an internal drainage curve. The multi-section integral internal side L4-L5-L6 and the external side L1-L2-L3 have complete matching, are defined as continuous curve, can realize seamless connection of the front and rear fins, and have no waste material in the middle continuous fin processing.

[0047] L1 and L2 intersect at point P1, L2 and L3 intersect at point P2, L4 and L5 intersect at point P3, and L5 and L6 intersect at point P4; the fin area between P1, P2, P3 and P4 is the middle section area, the fin area above the line connecting P1 and P3 is the upper section area, and the fin area below the line connecting P2 and P4 is the lower section area.

[0048] The line connecting the midpoint of the fin body main line segment L2 and the midpoint of L5 is a fin reference line ROC1, the number of holes on the upper and lower parts of the fin located on the fin reference line ROC1 is different, the heat exchanger is asymmetrically designed, the fin structure design can correspond to the non-uniform heat exchange wind field, better adapt to the difference of the wind field, significantly improve the heat exchange performance of the heat exchanger, and realize the performance of field cooperation.

[0049] As shown in Figure 2 The fin body is divided into three regions, i.e., an upper region, a middle region and a lower region, according to the relationship between the distribution row of the pipe hole through which the heat exchange pipe passes and the first reference line ROC1, the pipe holes on the upper region are located above ROC1 and are arranged in two rows, the pipe holes on the middle region pass through ROC1 and are arranged in three rows, and the pipe holes on the lower region are located below ROC1 and are arranged in two rows. The pipe hole distribution of this structure design corresponds to the wind field flow rate, the middle flow rate is large, the pipe rows are arranged more, the upper and lower flow rates are small, and the pipe rows are arranged less.

[0050] As shown in Figure 1 The length ratio of the main line segments L1 and L4 is 1.189±10%, the length ratio of L3 and L6 is 1.159±10%, the length ratio of the main line segment L2 and L1 is 0.529±10%, the length ratio of L2 and L3 is 0.457±10%, and the ratio of the lengths L2 and L5 is 1. When the fin is manufactured by this structure design, the fin can be directly punched and cut from a sheet material, waste in the processing process is significantly reduced, and the production cost is reduced.

[0051] The direction from left to right along the reference line ROC1 is a first reference direction, the included angle α1 between L1 and the reference line ROC1 along the first reference direction is 40-45°, and the ratio of the included angle between L4 and the reference line ROC1 along the first reference direction and the included angle between L1 and the reference line ROC1 along the first reference direction is 1.

[0052] The included angle α2 between L2 and the reference line ROC1 along the first reference direction is 85-95°, the ratio of the included angle between L5 and the reference line ROC1 along the first reference direction and the included angle between L2 and the reference line ROC1 along the first reference direction is 1, the included angle α3 between L3 and the reference line ROC1 along the first reference direction is 40-45°, and the ratio of the included angle between L6 and the reference line ROC1 along the first reference direction and the included angle between L3 and the reference line ROC1 along the first reference direction is 1.

[0053] The extension lines of the main line segments L1 and L3 on the left side outer edge of the fin intersect on the reference line ROC1, and the included angle α4 between the extension lines of the two is 80-90°. This angle design can balance the fin area and the smoothness of airflow.

[0054] The distance between the left outer edge and the right outer edge of the fin is the width W of the fin, the maximum width Wmax is between L2 and L5, the minimum width Wmin is between L1 and L4 or between L3 and L6, and Wmin=(0.667±10%)Wmax.

[0055] L5 corresponds to the area of the three-row tube hole heat exchanger, L5 is arranged by using the vertical reference line ROC1, the low-resistance proportion H2 / H of the drainage is 0.25-0.3, and this design is beneficial to realize the uniform wind field of the fin under the premise of realizing the rapid discharge of the condensate water in the evaporation condition, reduce the air resistance and improve the heat transfer coefficient.

[0056] H2 is the height of the middle section, and H is the overall height of the fin body. The height H1 of the upper section is 33.89%±10% of the overall height H of the fin, the height H2 of the middle section is 26.82%±10% of the overall height H of the fin, and the height H3 of the lower section is 39.29%±10% of the overall height H of the fin. The ratio of the overall height H of the fin to the width Wmax is 3.987±10%, and H1=0.669L1±10%. The middle section corresponds to a larger flow field, the upper section and the lower section correspond to a smaller flow field, the upper and lower heat exchange lengths are different, the wind field heat exchange is matched, the heat exchange is more uniform, and the performance is improved.

[0057] Each row of tube holes on each section of the fin body is distributed in an interval. The tube row lines formed by sequentially connecting the centers of each row of tube holes in the upper section are parallel to L1 or L4, the tube row lines formed by sequentially connecting the centers of each row of tube holes in the middle section are parallel to L2 or L5, and the tube row lines formed by sequentially connecting the centers of each row of tube holes in the lower section are parallel to L3 or L6.

[0058] The ratio of the distance D1 between the tube hole on the tube row line in the upper section and the nearest main line segment to the tube hole diameter D is 1.1-1.7, the ratio of the distance D2 between the tube hole on the tube row line in the middle section and the nearest main line segment to the tube hole diameter D is 1.2-1.6, and the ratio of the distance D3 between the tube hole on the tube row line in the lower section and the nearest main line segment to the tube hole diameter D is 1.2-1.6.

[0059] The ratio of the center distance D4 between the two rows of tube holes in the upper section and the lower section to the tube hole diameter D is 2.82±10%, and the ratio of the center distance D5 between each row of tube holes in the middle section to the tube hole diameter D is 2.78±10%. The ratio of the shortest distance D6 from the center of the tube hole closest to the edge line segment to the edge line of the edge line segment to the tube hole diameter D is 1.25-1.55.

[0060] The tube holes on the fin body adopt two tube spacings, D7 and D8, respectively. D7 is 16-18mm, and D8 is 13-15mm. The tube spacing of the three rows of tube holes in the middle section adopts D7, which is conducive to the optimal field synergy heat exchange of the three rows of wind resistance and drainage. The tube spacing of the upper and lower sections of the upper two rows of tube holes adopts D8 design, which is conducive to the optimal field synergy heat exchange with the fin width. Among them, the bottom area near the water tray is set with tube holes for the oblique insertion of heat exchange copper tubes. The hole spacing is D7, which facilitates the rapid discharge of water at the bottom and improves the heat transfer coefficient, while fully utilizing the fin area.

[0061] The ratio of the shortest distance D6 from the center of the pipe hole closest to the edge sealing segment to the edge line of the edge sealing segment to the pipe hole diameter D is in the range of 1.28 to 1.55.

[0062] like Figure 5 As shown, the fin body uses bridges or windows between adjacent copper tubes to enhance heat exchange. The number and shape of the windows and bridges are categorized and designed based on parameters such as wind field heat exchange and drainage resistance, with 2-4 being the preferred types.

[0063] like Figure 3 As shown, T1, T2, T3, and T4 are imaginary tangent lines between adjacent rows, which serve to improve the heat transfer coefficient between adjacent rows. The T1-T2-T3 shape corresponds to the L1-L2-L3 profile, providing optimal heat transfer resistance and serving as a heat resistance curve design.

[0064] In summary, the multi-stage integrated fin structure for the heat exchanger of the utility model is ingenious and has low production cost. The multi-stage integrated fin can significantly improve production efficiency and adapt to the heat exchange wind field with uneven heat exchange of the duct machine, and the overall performance is better.

[0065] The innovative design utilizes three rows of perforated tubes in the middle section, oriented vertically to match the highest wind speed area. While maintaining the same number of perforated tubes, the overall design utilizes a double row of perforated tubes to maximize heat exchange efficiency. The heat exchanger's asymmetrical design, with different numbers of perforated tubes in the upper and lower sections, better adapts to varying wind fields and maximizes field-synergistic performance. Combined with the fins' wind-rectifying effect, this allows for rapid condensate discharge during evaporation, addressing current industry shortcomings and significantly improving evaporative heat exchange efficiency and reducing wind resistance.

[0066] The above are only embodiments of the present invention. For example, an enhanced heat exchange design with open bridges or windows is adopted between adjacent copper tubes on the fin body. The number and shape of the windows and bridges are classified and designed according to parameters such as wind field heat exchange and drainage resistance, which can realize the multi-section integrated fin of the present invention.

[0067] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A multi-section integrated fin, characterized in that: The fin body is an integrated structure, and the fin body is distributed with tube holes for the heat exchange tubes to pass through. The fin body is divided into three areas from top to bottom: the upper area, the middle area, and the lower area; The fin outer edge line OCL is composed of multiple line segments, including sheet main line segments L1, L2, L3, L4, L5, L6 and edge banding line segments L7 and L9. The main line segments and edge banding line segments are connected in a clockwise order: L1-L7-L4-L5-L6-L9-L3-L2; the leeward side of the left outer edge of the fin, where the overall trend is to bend to the left, is composed of the sheet main line segments L1, L2, and L3 main line segments forming the left outer edge of the fin; the windward side of the right outer edge of the fin, where the overall trend is also to bend to the left, is composed of the sheet main line segments L4, L5, and L6 main line segments forming the right outer edge of the fin; Among them, L1 and L2 intersect at point P1, L2 and L3 intersect at point P2, L4 and L5 intersect at point P3, and L5 and L6 intersect at point P4; the fin area between P1, P2, P3 and P4 is the middle area, the fin area above the line connecting P1 and P3 is the upper area, and the fin area below the line connecting P2 and P4 is the lower area; The line connecting the midpoint of the main line segment L2 of the fin body and the midpoint of L5 is the fin reference line ROC1, and the number of holes on the upper and lower parts of the fin located above the fin reference line ROC1 is different; Each row of tube holes on each section of the fin body is distributed at intervals. The tube line formed by connecting the centers of each row of tube holes in the upper section is parallel to L1 or L4. The tube line formed by connecting the centers of each row of tube holes in the middle section is parallel to L2 or L5. The tube line formed by connecting the centers of each row of tube holes in the lower section is parallel to L3 or L6.

2. The multi-segment integrated fin according to claim 1, characterized in that: The tube holes on each section of the fin body are distributed in 2 or 3 rows; The pores in the upper region are located above ROC1 and are arranged in two rows, the pores in the middle region pass through ROC1 and are arranged in three rows, and the pores in the lower region are located below ROC1 and are arranged in two rows.

3. The multi-segment integrated fin according to claim 2, characterized in that: The ratio of the distance D1 between the tube hole on the tube arrangement line and the nearest main line segment to the tube hole diameter D in the upper section is 1.1 to 1.

7. The ratio of the distance D2 between the tube hole on the tube arrangement line and the nearest main line segment to the tube hole diameter D in the middle section is in the range of 1.2 to 1.

6. In the lower section, the ratio of the distance D3 between the tube holes on the tube arrangement line and the nearest main line segment to the diameter D of the tube holes is in the range of 1.2 to 1.

6.

4. The multi-segment integrated fin according to claim 3, characterized in that: The ratio of the center distance D4 between the two rows of tube holes in the upper and lower sections to the tube hole diameter D is 2.82±10%. The ratio of the distance D5 between the centers of each row of tube holes in the middle section to the tube hole diameter D is 2.78 ± 10% deviation. The ratio of the shortest distance D6 between the center of the tube hole closest to the edge sealing segment and the edge line of the edge sealing segment to the tube hole diameter D is in the range of 1.25 to 1.

55.

5. The multi-segment integrated fin according to claim 3, characterized in that: The tube holes on the fin body mainly adopt two kinds of tube spacing, namely D7 and D8, D7 is 16-18mm, D8 is 13-15mm, among which the tube spacing of the three rows of tube holes in the middle area adopts D7 tube spacing; the tube spacing of the two rows of tube holes in the upper and lower areas adopts D8 design. Among them, pipe holes are set near the bottom area of ​​the water receiving tray to facilitate the oblique insertion of heat exchange copper pipes, with a hole spacing of D7.

6. The multi-segment integrated fin according to claim 1, characterized in that: The upper and lower ends of the right outer edge of the fin are chamfered structures respectively, and the edge sealing lines L8 and L10 are edge sealing sections of the upper and lower chamfered structures respectively, L7-L8 constitute the upper edge sealing, and L10-L9 constitute the lower edge sealing; The length ratio of L1 to L4 is 1.189±10%; the length ratio of L3 to L6 is 1.159±10%; The length ratio of the main line segments L2 to L1 is 0.529±10%, the length ratio of L2 to L3 is 0.457±10%; and the length ratio of L2 to L5 is 1.

7. The multi-segment integrated fin according to claim 1, characterized in that: The direction from left to right along the reference line ROC1 is the first reference direction, the angle α1 between L1 and the reference line ROC1 along the first reference direction is 40-45°, and the ratio of the angle between L4 and the reference line ROC1 along the first reference direction to the angle between L1 and the reference line ROC1 along the first reference direction is 1; An angle α2 between L2 and the reference line ROC1 along the first reference direction is 85-95°, and a ratio of an angle between L5 and the reference line ROC1 along the first reference direction to an angle between L2 and the reference line ROC1 along the first reference direction is 1; An angle α3 between L3 and the reference line ROC1 along the first reference direction is 40-45°, and a ratio of an angle between L6 and the reference line ROC1 along the first reference direction to an angle between L3 and the reference line ROC1 along the first reference direction is 1; The extension lines of the main line segments L1 and L3 on the left outer edge of the fin intersect on the reference line ROC1, and the angle α4 between the extension lines is 80-90°.

8. The multi-segment integrated fin according to claim 7, characterized in that: L5 is set using the vertical reference line ROC1, and the drainage low resistance ratio H2 / H is 0.25-0.3, where H2 is the height of the middle section area and H is the overall height of the fin body; The distance between the left outer edge and the right outer edge of the fin is the width W of the fin, the maximum value Wmax of the width W is between L2 and L5, the minimum value Wmin of the width W is between L1 and L4 or between L3 and L6, and Wmin=(0.667±10%)Wmax; The height H1 of the upper section area is 33.89% of the overall fin height H with a deviation of 10%, the height H2 of the middle section area is 26.82% of the overall fin height H with a deviation of 10%, and the height H3 of the lower section area is 39.29% of the overall fin height H with a deviation of 10%; The ratio of the overall fin height H to the width Wmax is 3.987±10%.

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