Fin structure and heat exchanger

Patent metadata

Field	Value
Publication number	US-12429292-B2
Application number	US-202117910597-A
Country	US
Kind code	B2
Filing date	Mar 5, 2021
Priority date	Jun 24, 2020
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

Provided is a fin tube heat exchanger in which multiple stacked fins are formed into a particular shape so as to make the air flow between the fins smoother and which exhibits excellent heat transfer performance by increasing the ridge lines that are the lines of intersection between surfaces in order to enhance the heat transfer performance between the fins and the air flow. A fin tube heat exchanger wherein: stacked heat-transfer fins each have a wedge-shaped dent ( 80 ) on the upstream wind side and the downstream wind side of a fin collar ( 60 ); the dent ( 80 ) is configured from a first ridge line ( 80 a ) extending in the column direction in the upstream wind side and downstream wind side of the fin collar ( 60 ), and two second ridge lines ( 80 b ) which are arranged in the shape of a V and which derive from the vertex (P) of the first ridge line ( 80 a ) and a ridge line ( 40 b ) on the valley side extending in the step direction; and two V-shaped slanted planes are formed by means of the first ridge line ( 80 a ) and the second ridge lines ( 80 b ).

First claim

The invention claimed is:

1. A fin structure, comprising:
a fin base, wherein the fin base is provided with a tube hole for a heat exchange tube to passthrough, and the fin base is a corrugated fin; and
a plurality of convex parts, wherein the plurality of convex parts are disposed on the fin base, and the plurality of convex parts surround an outer circumference of the tube hole;
wherein the fin base comprises a plurality of first fin portions and a plurality of second fin portions, at least two of the plurality of second fin portions connected between two of the plurality of first fin portions, a dimension L1 of any one of the first fin portions along the corrugation length direction of the fin base is greater than a dimension L2 of any one of the second fin portions along the corrugation length direction of the fin base;
wherein the plurality of convex parts comprise an annular convex part and a lateral convex part, the annular convex part being convexly disposed on the one of the plurality of first fin portions, the lateral convex part being convexly disposed on the one of the plurality of second fin portions.

2. The fin structure according to claim 1 , comprising two of the plurality of second fin portions connected between two of the plurality of first fin portions, and wherein the two second fin portions are disposed adjacently.

3. The fin structure according to claim 1 , wherein the annular convex part is an annular convex structure, a plurality of the annular convex parts are disposed, and the plurality of the annular convex parts are symmetrically distributed on the outer circumference of the tube hole.

4. The fin structure according to claim 1 , wherein the lateral convex part is a boss, a plurality of the lateral convex parts are disposed, and the plurality of the lateral convex parts are symmetrically distributed on the outer circumference of the tube hole.

5. The fin structure according to claim 1 , wherein the fin base is provided with:
an annular groove, wherein the tube hole is located in the annular groove, the annular groove and the tube hole are concentrically disposed, an outer circumference of the annular groove is connected to one of the plurality of the first fin portions and one of the plurality of the second fin portions, and the convex parts are all located outside the annular groove.

6. The fin structure according to claim 5 , wherein,
there are two of the plurality of second fin portions between two of the plurality of first fin portions, the two second fin portions are disposed adjacently, and a wave trough line is formed on which the two second fin portions intersect; and
two arc-shaped surfaces symmetrical with respect to the tube hole are formed at joints between the annular groove and the two first fin portions, and four planes symmetrical with respect to the tube hole are formed at joints between the annular groove and the two second fin portions.

7. The fin structure according to claim 6 , wherein,
a groove bottom of the annular groove is tangent to the wave trough line in a vertical incoming flow direction; and an included angle θ between a generatrix of the arc-shaped surface and a central axis of the heat exchange tube is 45°.

8. The fin structure according to claim 5 , wherein a ratio d1/D of a diameter d1 of the groove bottom of the annular groove to an outer diameter D of the heat exchange tube is 1.6˜1.7.

9. The fin structure according to claim 2 , wherein the two first fin portions are symmetrically disposed with respect to the tube hole, and the two second fin portions are symmetrically disposed with respect to the tube hole.

10. The fin structure according to claim 1 , wherein a ratio D1/D of an inner diameter D1 of the tube hole to an outer diameter D of the heat exchange tube is 1.025˜1.035.

11. A heat exchanger, comprising the fin structure according to claim 1 .

12. The heat exchanger according to claim 11 , comprising a plurality of the fin structures, wherein,
the fin base comprises a plurality of first fin portions and a plurality of second fin portions, at least two of the plurality of second fin portions connected between two of the plurality of first fin portions, a dimension L1 of any one of the first fin portions along the corrugation length direction of the fin base is greater than a dimension L2 of any one of the second fin portions along the corrugation length direction of the fin base;
a ratio h1/S0 of a corrugation height h1 of the fin base to a fin spacing S0 is 0.58˜0.62, and L1/L2 is 1.5˜1.7.

13. The heat exchanger according to claim 11 , comprising a plurality of the fin structures, wherein,
the fin base comprises a plurality of first fin portions and a plurality of second fin portions, at least two of the plurality of second fin portions connected between two of the plurality of first fin portions, a dimension L1 of any one of the first fin portions along the corrugation length direction of the fin base is greater than a dimension L2 of any one of the second fin portions along the corrugation length direction of the fin base;
the plurality of convex parts comprise an annular convex part, the annular convex part being convexly disposed on the first fin portion; and
a ratio h3/S0 of a raised height h3 of the annular convex part to the fin spacing S0 is 0.35˜0.4.

14. The heat exchanger according to claim 11 , comprising a plurality of the fin structures, wherein,
the fin base comprises a plurality of first fin portions and a plurality of second fin portions, at least two of the plurality of second fin portions connected between two of the plurality of first fin portions, a dimension L1 of any one of the first fin portions along the corrugation length direction of the fin base is greater than a dimension L2 of any one of the second fin portions along the corrugation length direction of the fin base;
the plurality of convex parts comprise a lateral convex part, the lateral convex part being convexly disposed on the second fin portion; and
a ratio h2/S0 of a raised height h2 of the lateral convex part to the fin spacing S0 is 0.35˜0.4.

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Xiang Wu
• Ma Quyang
• Yu Ge
• Xia Kai
• Lin Weixue
• Zhang Shiqiang

Classifications

• F28F2215/10

  Secondary fins, e.g. projections or recesses on main fins · CPC title

• F28F1/32 Primary

  the means having portions engaging further tubular elements · CPC title