CN214582721U

CN214582721U - Novel heat exchanger fin

Info

Publication number: CN214582721U
Application number: CN202021751314.2U
Authority: CN
Inventors: 袁志杰; 五十住晋一; 相金波
Original assignee: Mitsubishi Heavy Industries Haier Qingdao Air Conditioners Co Ltd
Current assignee: Mitsubishi Heavy Industries Haier Qingdao Air Conditioners Co Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-11-02
Anticipated expiration: 2030-08-20

Abstract

The utility model provides a novel heat exchanger fin, including the fin body, the fin body is the corrugate of multifold, and the ripple width that is located the middle part is greater than the width of the ripple of connecting in middle part ripple both sides, the ripple corner of fin body is circular-arc, and the radian that is located the ripple corner at middle part is greater than the radian of the ripple corner of connecting in middle part ripple both sides, the fin body is 10-25 with the contained angle of air current flow direction. The heat transfer fin of this patent is four-fold corrugated structure, and the width of fin is not conventional aequilate, and ripple corner radian is also not conventional equal, and the fin body is 25 when 1.5 with the contained angle of air current flow direction, and the heat transfer volume of fin reaches the maximum value, and when the fin body was 21 when 1 with the contained angle of air current flow direction, heat exchange efficiency reached the optimum.

Description

Novel heat exchanger fin

Technical Field

The utility model belongs to the technical field of the heat exchanger, concretely relates to novel heat exchanger fin.

Background

For a gas-liquid heat exchanger, the main thermal resistance of the whole heat exchanger is on the air side, and therefore, various high-efficiency fins are developed, wherein the corrugated fins have great comprehensive advantages in the aspects of heat exchange capacity, strength and blocking resistance. The fin structure is mainly determined by the tube pitch Pt and the row pitch Pl. Pt refers to the tube spacing of the fin mounting holes in the height direction; pl refers to the width of a single row of fins and is also the row spacing of a multi-row heat exchanger. The Pt and Pl of the fin have great influence on the performance of the tube-fin heat exchanger; the smaller the Pt is, the more copper pipes are arranged in the height direction of the heat exchanger, the better the heat exchange performance of the heat exchanger is, but the higher the cost of the copper pipe part of the heat exchanger is. The larger Pl, the larger the fin heat exchange area and the better the heat exchanger performance, but the greater the cost of the fin portion of the heat exchanger. The cost of the copper pipe part of the tube-fin heat exchanger accounts for about 90% of the whole cost of the heat exchanger, and the cost of the fin part accounts for about 10%. Therefore, if the cost of the tube-fin heat exchanger is fixed, a set of optimal Pt and Pl inevitably exists, so that the performance of the heat exchanger reaches the best, but the Pt and Pl values of the existing heat exchange fins are fixed, namely under the condition of a certain cost, the heat exchange performance of the existing heat exchange fins still does not reach the best.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel heat exchanger fin solves current fin under the certain circumstances of cost, and fin heat transfer performance does not reach the optimal problem.

The utility model provides a pair of novel heat exchanger fin, including the fin body, the fin body is the corrugate of multifolding, and the ripple width that is located the middle part is greater than the width of the ripple of connecting in middle part ripple both sides, the ripple corner of fin body is circular-arc, and the radian that is located the ripple corner at middle part is greater than the radian of the ripple corner of connecting in middle part ripple both sides, the fin body is 10-25 with the contained angle of air current flow direction.

Preferably, the fin body is provided with four-fold corrugations, and the width of the two-fold corrugations in the middle is larger than the width of the corrugations connected to two sides of the two-fold corrugations in the middle.

Preferably, the width of the corrugation of the fin body in the middle is 6mm, and the width of the corrugation of the fin body connected to the two sides of the corrugation in the middle is 2.6 mm.

Preferably, the radian of the fin body at the corner of the middle corrugation is 1.6 degrees, and the radians of the fin body connected to the corners of the middle corrugation at two sides are 0.8 degrees

Preferably, the angle between the fin body and the airflow flowing direction is 25 degrees +/-1.5 degrees.

Preferably, the angle between the fin body and the airflow flowing direction is 21 degrees +/-1.

Preferably, the Pt value of the fin body is 21.2mm, the Pl value is 18.19mm, and the included angle between the fin body and the airflow flowing direction is 26 degrees.

The utility model has the advantages that:

the heat transfer fin of this patent is four-fold ripple structure, and the width of fin is not conventional aequilate, and ripple corner radian also is not conventional equal, is 21.2mm at the Pt value of fixed fin body, and the Pl value is 18.19mm, and when fin body and air current flow direction's contained angle was 26, the heat transfer volume of fin reached the maximum value, and when fin body and air current flow direction's contained angle was 21, heat exchange efficiency reached the best.

Drawings

Fig. 1 is a schematic structural view of a heat exchanger fin of the present invention;

FIG. 2 is a graph showing the calculation result of the relationship between the corrugated angle of the fin and the heat exchange amount of the heat exchanger of the present invention;

fig. 3 is the utility model discloses heat exchanger fin ripple angle and heat exchange efficiency calculation result picture.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the scope of the invention.

Examples

Referring to fig. 1, the novel heat exchanger fin of this embodiment, including fin body 1, fin body 1 is the corrugate of four folds, and the two folds ripple width that is located the middle part is greater than the width of the ripple of connecting in middle part ripple both sides, and is specific, and the width of the ripple that is located the middle part of fin body 1 of this embodiment is 6mm, and the width of the ripple of connecting in middle part ripple both sides is 2.6 mm. The ripple corner of fin body 1 is circular-arc, and the radian that is located the ripple corner at middle part is greater than the radian of connecting the ripple corner in middle part ripple both sides, and is specific, and the radian that is located the ripple corner at middle part of fin body 1 of this embodiment is 1.6, and the radian of connecting the ripple corner in middle part ripple both sides is 0.8. The included angle between the fin body 1 and the airflow flowing direction is 10-25 degrees.

As shown in fig. 2, 4 different sets of Pt values and Pl values were selected to calculate the heat exchange amount of the fin body 1 of the present embodiment, and as can be seen from fig. 2, the Pt value of the fin body 1 is 21.2mm, the heat exchange amount of the fin with the Pl value of 18.19mm is relatively high, while the fixed Pt value is 21.2mm, the Pl value is 18.19mm, and the heat exchange amount reaches the maximum value when the corrugation angle is 26 °. The corrugated angle in the figure is the included angle between the fin body 1 and the airflow flowing direction. As shown in fig. 3, the heat exchange efficiency of the fin of this embodiment is calculated, and it can be seen from the figure that when the corrugation angle is 10 °, the heat exchange efficiency is the lowest, and when the corrugation angle is 21 °, the heat exchange efficiency is the highest, and the corrugation angle is increased again, and the heat exchange efficiency is reduced.

Claims

1. The utility model provides a novel heat exchanger fin, includes the fin body, its characterized in that: the fin body is in a multi-fold corrugated shape, the width of the corrugation in the middle is larger than the width of the corrugations connected to two sides of the corrugation in the middle, the corner of the corrugation of the fin body is arc-shaped, the radian of the corner of the corrugation in the middle is larger than the radian of the corner of the corrugation connected to two sides of the corrugation in the middle, and the included angle between the fin body and the airflow flowing direction is 10-25 degrees.

2. The novel heat exchanger fin as claimed in claim 1, wherein: the fin body is provided with four-fold corrugations, and the width of the two-fold corrugations in the middle is larger than the width of the corrugations connected to two sides of the two-fold corrugations in the middle.

3. The novel heat exchanger fin as claimed in claim 2, wherein: the width of the corrugation of the fin body in the middle is 6mm, and the width of the corrugation of the fin body connected to the two sides of the corrugation in the middle is 2.6 mm.

4. The novel heat exchanger fin as claimed in claim 2, wherein: the radian of the fin body at the corrugated corner at the middle part is 1.6 degrees, and the radians of the fin body at the corrugated corners at the two sides of the middle part are 0.8 degrees.

5. The novel heat exchanger fin as claimed in any one of claims 1 to 4, wherein: the included angle between the fin body and the airflow flowing direction is 25 degrees +/-1.5 degrees.

6. The novel heat exchanger fin as claimed in any one of claims 1 to 4, wherein: the included angle between the fin body and the airflow flowing direction is 21 degrees +/-1.

7. The novel heat exchanger fin as claimed in claim 5, wherein: the Pt value of the fin body is 21.2mm, the Pl value of the fin body is 18.19mm, and the included angle between the fin body and the airflow flowing direction is 26 degrees.