CN109470075B - Fin and heat exchanger - Google Patents
Fin and heat exchanger Download PDFInfo
- Publication number
- CN109470075B CN109470075B CN201710803720.5A CN201710803720A CN109470075B CN 109470075 B CN109470075 B CN 109470075B CN 201710803720 A CN201710803720 A CN 201710803720A CN 109470075 B CN109470075 B CN 109470075B
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- Prior art keywords
- fin
- fins
- air flow
- hole
- holes
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000010432 diamond Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 229910003460 diamond Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2215/00—Fins
- F28F2215/10—Secondary fins, e.g. projections or recesses on main fins
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the field of fin tube heat exchangers, and discloses a fin and a heat exchanger, wherein the fin comprises a body (10), a through hole (11) for sleeving a base tube (20) is formed in the body (10), and a guide structure capable of guiding air flow flowing through the fin to the rear of the through hole (11) is arranged on the surface of the body (10) around the through hole (11). When the fin is used, the air flow flowing through the fin can be introduced into the wake area behind the base pipe through the guide structure formed on the surface of the fin, so that the heat exchange effect of the wake area is enhanced, and meanwhile, the air flow can generate secondary flow perpendicular to the air flow direction of the fin, so that the heat exchange capacity of the heat exchanger is improved.
Description
Technical Field
The invention relates to the field of fin tube heat exchangers, in particular to a fin and a heat exchanger containing the fin.
Background
The fin-tube heat exchanger is the most widely used heat exchange equipment in gas and liquid heat exchangers, and is the most common heat exchanger in air conditioners and refrigerators. The heat transfer is enhanced by adding fins on a common base tube (such as a round tube, an elliptic tube or a flat tube).
The fins used at present comprise flat sheets, corrugated sheets, slotted sheets and the like, wherein the corrugated fins are widely used because the heat exchange area of the fins can be increased, and the heat exchange capacity of the fins is improved. However, since the convex portions and concave portions forming the corrugations in the conventional corrugated fin are mostly alternately arranged along the airflow direction of the fin, the airflow cannot be introduced into the wake area behind the base tube, so that the heat exchange capacity of the wake area behind the base tube is poor, and the heat exchange performance of the fin is further affected.
Disclosure of Invention
The invention aims to provide a fin and a heat exchanger with the fin, wherein the fin can guide air flow into a wake area behind a base pipe, and strengthen the heat exchange effect of the wake area, so that the heat exchange capacity of the heat exchanger is improved.
In order to achieve the above object, the present invention provides a fin including a body having a through hole for housing a base pipe, and a guide structure provided around the through hole on a surface of the body for guiding an air flow flowing through the fin to a rear of the through hole.
Preferably, the guide structure includes convex portions and concave portions alternately appearing outward from the through hole, the convex portions and concave portions being disposed symmetrically with respect to a center line of the through hole, respectively.
Preferably, the convex portion and the concave portion are formed in a square or a diamond shape, respectively, around the through hole, and each side of the square or diamond shape is deviated from the air flow direction of the fin.
Preferably, the angle α by which the edge deviates from the direction of the air flow is 15 to 75 °.
Preferably, the convex and concave portions are formed in an elliptical shape or a circular shape around the through hole, respectively.
Preferably, the spacing e between adjacent ones of the projections or recesses is 2 to 5mm, and/or
The protruding height of the convex portion or the recessed depth of the concave portion is 0.3-2.5 mm, and the alternately appeared convex portion and concave portion are formed in a corrugated structure with a corrugation inclination delta of 60-156 deg.
Preferably, the body is provided with a plurality of through holes, and the through holes are arranged at intervals along the length direction of the body.
Preferably, the distance a between the center lines of the adjacent through holes is 12-25 mm.
Preferably, the through hole is formed in a circular shape, and the aperture of the through hole is 5-9 mm; and/or
The body is square, and the width or side length b of the body is 8-22 mm.
The invention also provides a heat exchanger, which comprises a base pipe and fins sleeved on the base pipe, wherein the fins are the fins.
Preferably, the heat exchanger comprises a plurality of the fins and base pipes, wherein:
A plurality of fins are arranged at intervals in parallel with each other along the extending direction of the base pipe, and/or
The fins are arranged side by side along the air flow direction, the base pipes are sleeved on each fin in an arrayed mode, and the base pipes in each array are arranged in a staggered mode or aligned mode along the air flow direction.
Preferably, the distance d between the fins arranged in the extending direction of the base pipe is 0.8 to 2.5mm.
Through the technical scheme, when the fin is used, the air flow flowing through the fin can be introduced into the wake area behind the base pipe through the guide structure formed on the surface of the fin, so that the heat exchange effect of the wake area is enhanced, and meanwhile, the air flow can generate secondary flow perpendicular to the air flow direction of the fin, so that the heat exchange capacity of the heat exchanger is effectively improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 is a top view of one embodiment of a heat exchanger of the present invention wherein only fins and a base pipe are shown and wherein two fins are arranged side by side;
FIG. 2 is a cross-sectional view of FIG. 1 and A-A;
Fig. 3 is a perspective view of fig. 1.
Description of the reference numerals
10. Body 11 through hole
12. Convex portion 13 concave portion
20. Base pipe
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
It should be noted that, in the present invention, the air flow direction of the fin refers to the direction when the fluid (such as air) flows into the fin, and specifically refers to the direction indicated by the arrow in the drawing.
The invention provides a fin, which comprises a body 10, wherein a through hole 11 for sleeving a base pipe 20 is formed in the body 10, and a guide structure capable of guiding air flow flowing through the fin to the rear of the through hole 11 is arranged on the surface of the body 10 around the through hole 11.
When the heat exchanger is used, the fins can guide the air flow flowing through the fins into the wake area behind the base pipe 20 through the guide structure formed on the surfaces of the fins, so that the heat exchange effect of the wake area is enhanced, and meanwhile, the air flow can generate secondary flow perpendicular to the air flow direction of the fins, so that the heat exchange capacity of the heat exchanger is improved.
According to a preferred embodiment of the guide structure according to the present invention, as shown in fig. 1, the guide structure includes convex portions 12 and concave portions 13 alternately appearing outwardly from the through hole 11, the convex portions 12 and concave portions 13 being disposed symmetrically with respect to a center line of the through hole 11, respectively. In this way, when the air flow passes through the fins in the air flow direction, part of the air flow can flow into the rear of the through holes 11 under the guidance of the convex portions 12 and concave portions 13 provided around the through holes 11 to enhance the heat exchange effect behind the through holes 11. Furthermore, the provision of the convex portion 12 not only increases the heat exchanging area of the fin, but also interrupts the boundary layer of the air flow in the flow direction of the air flow, thereby improving the heat exchanging performance of the fin.
Wherein, according to one embodiment of the present invention, the convex portion 12 and the concave portion 13 are formed in a square or a diamond shape, respectively, around the through hole 11, and each side of the square or diamond shape is deviated from the air flow direction of the fin. In this way, the directions in which the convex parts 12 and the concave parts 13 alternately appear are not perpendicular to the direction of the air flow, so that a large amount of air flow can be introduced into the rear of the through holes 11, the pressure loss of the air flow in the flowing process can be reduced, and the heat exchange performance of the fins can be effectively improved.
Preferably, the angle α by which the side deviates from the direction of the air flow is 15 to 75 °.
According to another embodiment of the present invention, the convex portion 12 and the concave portion 13 are formed in an elliptical shape or a circular shape, respectively, around the through hole 11. This can enhance the flow linearity of the air flow while introducing the air flow into the rear of the through hole 11, and reduce the pressure loss of the air flow during the flow process, thereby improving the heat exchange performance of the fin.
In order to further enhance the heat exchange performance of the fin of the present invention, the present invention also optimizes specific parameters of the guiding structure, as shown in fig. 1-3, wherein a spacing e between adjacent convex portions 12 or concave portions 13 is 2-5 mm; the protruding height of the convex part 12 or the concave depth of the concave part 13 is 0.3-2.5 mm; the alternately occurring protrusions 12 and recesses 13 are formed in a corrugated structure having a corrugation inclination delta of 60 to 156 deg..
In actual use, a plurality of base pipes 20 can be sleeved on one fin at the same time. According to a preferred embodiment of the present invention, the body 10 is provided with a plurality of through holes 11, and the plurality of through holes 11 are arranged at intervals along the length direction of the body 10.
Preferably, the distance a between the center lines of the adjacent through holes 11 is 12 to 25mm.
In the present invention, the base pipe 20 may be a circular pipe, an elliptical pipe, or a flat pipe. According to a preferred embodiment of the present invention, the base pipe 20 is a circular pipe, the through-hole 11 is formed in a circular shape, and the outer diameter of the circular pipe (i.e., the aperture of the through-hole 11) is preferably 5 to 9mm.
In the present invention, the body 10 may have any shape. According to a preferred embodiment of the body 10 of the present invention, as shown in fig. 1, the body 10 may be formed in a square shape, for example, a rectangle or square shape, and the width or side length b of the body 10 is preferably 8 to 22mm, i.e., when the body 10 is formed in a rectangle shape, the width of the body 10 is preferably 8 to 22mm; when the body 10 is formed in a square shape, the side length of the body 10 is preferably 8 to 22mm.
The invention also provides a heat exchanger which comprises a base pipe 20 and fins sleeved on the base pipe 20, wherein the fins are the fins.
In the present invention, the heat exchanger may include a plurality of the fins and the base pipes 20.
Wherein a plurality of the fins and base pipes 20 may be arranged in various ways. In order to achieve the best heat exchange effect with the smallest space occupation, the present invention gives three preferred arrangements of the fins and base pipes 20: the first arrangement is such that a plurality of the fins are arranged at intervals parallel to each other along the extending direction of the base pipe 20; the second arrangement mode is to arrange a plurality of fins side by side along the air flow direction, wherein each fin is sleeved with the base pipes 20 in an arrangement mode, and each row of the base pipes 20 is arranged in a staggered or aligned mode along the air flow direction; the third arrangement mode is a combination of the first arrangement mode and the second arrangement mode, namely, the fins in each group are grouped, the fins in each group are arranged side by side along the air flow direction, each fin is sleeved with the base pipes 20 in an arrangement mode, and the base pipes 20 in each row are arranged in a staggered or aligned mode along the air flow direction; the fins of different groups are arranged in parallel with each other at intervals along the extending direction of the base pipe 20.
Further, as shown in fig. 3, the distance d between the fins arranged in the extending direction of the base pipe 20 is preferably 0.8 to 2.5mm.
By adopting the scheme, compared with the structure that the convex parts and the concave parts forming the corrugation in the existing corrugated fin alternately appear along the airflow direction of the fin, the heat exchange capacity of the heat exchanger can be improved by more than 15%.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (8)
1. A fin comprising a body (10), said body (10) being provided with a plurality of through holes (11) for housing a base tube (20), characterized in that a guide structure is provided around each of said through holes (11) on the surface of said body (10) for guiding an air flow flowing through said fin into the rear of said through holes (11),
Wherein the guide structure comprises convex parts (12) and concave parts (13) which alternately appear outwards from the through hole (11), the convex parts (12) and the concave parts (13) are respectively symmetrically arranged about the central line of the through hole (11), the convex parts (12) and the concave parts (13) are respectively formed into square or diamond shapes around the through hole (11), each side of the square or diamond shapes deviates from the airflow direction of the fin, the deviation angle alpha of the side deviating from the airflow direction is 15-75 degrees, and the convex parts (12) and the concave parts (13) between the adjacent through holes (11) are continuously arranged.
2. The fin according to claim 1, wherein the spacing e between adjacent projections (12) or recesses (13) is 2-5 mm, and/or
The protruding height of the protruding part (12) or the recessed depth of the recessed part (13) is 0.3-2.5 mm, and the alternately arranged protruding part (12) and recessed part (13) are formed in a corrugated structure, and the corrugated inclination delta of the corrugated structure is 60-156 degrees.
3. The fin according to claim 1, wherein a plurality of through holes (11) are formed in the body (10), and the plurality of through holes (11) are arranged at intervals along the length direction of the body (10).
4. A fin according to claim 3, wherein the spacing a between the centerlines of adjacent through holes (11) is 12 to 25mm.
5. The fin according to claim 1, wherein the through hole (11) is formed in a circular shape, and the aperture of the through hole (11) is 5 to 9mm; and/or
The body (10) is formed in a square shape, and the width or side length b of the body (10) is 8-22 mm.
6. A heat exchanger comprising a base pipe (20) and fins sleeved on the base pipe (20), characterized in that the fins are as claimed in any one of claims 1 to 5.
7. The heat exchanger according to claim 6, wherein the heat exchanger comprises a plurality of the fins and base pipes (20), wherein:
A plurality of fins are arranged at intervals in parallel with each other along the extending direction of the base pipe (20), and/or
The fins are arranged side by side along the air flow direction, the base pipes (20) are sleeved on each fin in an arrayed mode, and the base pipes (20) in each array are arranged in a staggered mode or aligned mode along the air flow direction.
8. The heat exchanger according to claim 7, wherein the spacing d between the fins arranged in the extending direction of the base pipe (20) is 0.8 to 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710803720.5A CN109470075B (en) | 2017-09-08 | 2017-09-08 | Fin and heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710803720.5A CN109470075B (en) | 2017-09-08 | 2017-09-08 | Fin and heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109470075A CN109470075A (en) | 2019-03-15 |
| CN109470075B true CN109470075B (en) | 2024-04-30 |
Family
ID=65657746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710803720.5A Active CN109470075B (en) | 2017-09-08 | 2017-09-08 | Fin and heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109470075B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220373270A1 (en) | 2019-07-26 | 2022-11-24 | Atago Manufacturing Co., Ltd. | Heat exchange promotion member and heat exchanger |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141880A (en) * | 1996-11-12 | 1998-05-29 | Matsushita Electric Ind Co Ltd | Heat exchanger with fin |
| CN202255028U (en) * | 2011-07-14 | 2012-05-30 | 许昌怡家电器有限公司 | Enhanced heat exchange fin |
| CN104110993A (en) * | 2014-08-01 | 2014-10-22 | 兰州交通大学 | Streamline iso-amplitude wavy fin for round tube fin heat exchanger |
| CN207439232U (en) * | 2017-09-08 | 2018-06-01 | 美的集团股份有限公司 | Fin and heat exchanger |
-
2017
- 2017-09-08 CN CN201710803720.5A patent/CN109470075B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141880A (en) * | 1996-11-12 | 1998-05-29 | Matsushita Electric Ind Co Ltd | Heat exchanger with fin |
| CN202255028U (en) * | 2011-07-14 | 2012-05-30 | 许昌怡家电器有限公司 | Enhanced heat exchange fin |
| CN104110993A (en) * | 2014-08-01 | 2014-10-22 | 兰州交通大学 | Streamline iso-amplitude wavy fin for round tube fin heat exchanger |
| CN207439232U (en) * | 2017-09-08 | 2018-06-01 | 美的集团股份有限公司 | Fin and heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109470075A (en) | 2019-03-15 |
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