CN111928712A

CN111928712A - Fin and heat exchanger

Info

Publication number: CN111928712A
Application number: CN202010701580.2A
Authority: CN
Inventors: 黄起建
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2020-11-13
Anticipated expiration: 2040-07-20
Also published as: CN111928712B

Abstract

The invention provides a fin, wherein at least one group of slit structures are formed along the direction from an air inlet side to an air outlet side of the fin, and the slit directions of the slit structures face the air inlet side. The fin slotting structure arranged in the same direction reduces the influence of the diversion of the front end slotting structure on the rear end slotting of the slotting structure in the prior art, and effectively improves the heat exchange efficiency of the fin. Furthermore, as wind enters the fins from one side, the symmetrically arranged slotted structures in the prior art block the wind flow from the side opposite to the wind side, and the slotted structures arranged in the same direction are adopted, so that the slotted direction faces the wind inlet direction.

Description

Fin and heat exchanger

Technical Field

The invention relates to the field of air-conditioning heat exchangers, in particular to a fin and a heat exchanger.

Background

Air conditioning equipment is as the current essential domestic appliance in living, its excellent performance's indirect heating equipment plays very important effect, in various air indirect heating equipment, common fin form is the structure of symmetrical design, the crack of a row of fin is arranged with fin central line symmetry promptly, this kind of fin structure leads to when wind passes through the fin, the windage coefficient is great, and obvious water conservancy diversion can appear through the fin of front end, this kind of fin structure makes the water conservancy diversion effect of front end fin crack direction improve the influence of rear end crack direction simultaneously, the heat exchange efficiency of unit fin has been reduced, so, need for a current structure that exists among the prior art of structural solution to lead to the problem that heat exchange efficiency descends.

Disclosure of Invention

The present invention is directed to a fin and heat exchanger that reduces the windage coefficient of prior symmetrical designs.

In order to achieve the purpose, the invention provides a fin, wherein the fin at least forms a group of slotted structures along the direction from the air inlet side to the air outlet side, and the slotted directions of the slotted structures face the air inlet side. According to the invention, the slotting direction of the slotting structure of the fin is set to face the air inlet, so that the influence of the diversion of the front-end slotting structure on the rear-end slotting of the slotting structure in the prior art is reduced greatly, and the heat exchange efficiency of the fin is effectively improved.

Preferably, the height of the seam structure is increased along the direction from the air inlet side to the air outlet side.

Preferably, the difference in the height of the slits between two adjacent slit structures is Hn +1 — Hn (1% to 15%) Hn, where n is a natural number and n is equal to or greater than 1.

Preferably, the slit height difference of the slit structure is Hn +1 — Hn ═ Hn (6% to 10%) Hn.

Preferably, the angle of the slot structure increases along the direction from the air inlet side to the air outlet side.

Preferably, the width of the slits of the slit structure is constant along the direction from the air inlet side to the air outlet side, and the twisting angles of the fins at the slit structure are sequentially increased along the direction from the air inlet side to the air outlet side.

Preferably, the length of the slits of the slit structure increases in sequence from the air inlet side to the air outlet side.

Preferably, the air inlet of the slotted structure is arc-shaped.

Preferably, the fin is provided with at least one row of heat exchange tube holes, and at least one group of slotted structures is arranged between every two adjacent tube holes.

Preferably, the slotted structures are arranged in two groups, and the two groups of slotted structures are symmetrically arranged.

A heat exchanger provided with the above-described fin.

According to the invention, through further optimization design of the slotted structure of the fin, compared with the prior art, the influence of the flow guiding effect of the slotted structure at the front end in the existing fin structure on the slotted structure at the rear end is reduced, and meanwhile, through further optimization of the slotted height, the slotted angle, the torsion angle at the slotted structure and the slotted structure of the air inlet of the slotted structure, the influence of the flow guiding effect of the slotted structure at the rear end of the slotted structure on the slotted structure at the front end is greatly reduced, meanwhile, the participation degree of the slotted structure of the fin on turbulence is improved, and the heat exchange efficiency of the fin is effectively improved.

Drawings

Fig. 1 is a schematic view of a unidirectional slotted structure in embodiment 1 of the present invention;

FIG. 2 is a top plan view of a slotted fin in accordance with example 1 of the present invention;

fig. 3 is a schematic structural view of increasing the single-sided slotting and slotting height in embodiment 1 of the present invention;

fig. 4 is a schematic structural view of increasing the single-sided slotting and slotting angle in embodiment 1 of the present invention;

fig. 5 is a schematic structural view of embodiment 2 of the present invention illustrating a symmetrical slotting and slotting height increase;

fig. 6 is a schematic structural view of embodiment 2 of the present invention illustrating a symmetrical slotting and slotting angle increase;

fig. 7 is a top plan view of a slotted fin in accordance with example 2 of the present invention.

1-a fin; 2-slotting structure; 3-heat exchange tube

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

As used herein, the terms "first," "second," and the like may be used to describe elements of exemplary embodiments of the invention. These terms are only used to distinguish one element from another element, and the inherent features or order of the corresponding elements and the like are not limited by the terms. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms, such as those defined in commonly used dictionaries, are to be interpreted as having a meaning that is consistent with their context in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Those skilled in the art will understand that the devices and methods of the present invention described herein and illustrated in the accompanying drawings are non-limiting exemplary embodiments and that the scope of the present invention is defined solely by the claims. Features illustrated or described in connection with one exemplary embodiment may be combined with features of other embodiments. Such modifications and variations are intended to be included within the scope of the present invention.

Example 1

The present embodiment provides a fin, such as the fin shown in fig. 1-4, the fin forms at least one set of slits along the direction from the air inlet side to the air outlet side, and the slits of the slits face the air inlet side.

Because of wind blows to the fin from one side, the structure of slotting that the symmetry set up among the prior art blocks the flow of wind one side dorsad wind, and the structure of slotting that the embodiment adopted the unanimous direction to set up makes the direction of slotting towards the air inlet direction, has reduced the rear end of prior art structure of slotting and has slotted the water conservancy diversion influence that the structure was slotted to the front end, compares in the symmetry set up the structure of slotting among the prior art, reduces the windage coefficient, the effectual heat exchange efficiency who improves the fin. Furthermore, the height of the slots of the slot structure on the fins is sequentially increased along the direction from the air inlet side to the air outlet side. The influence of the front-end slotting structure on the rear-end slotting structure is reduced by sequentially improving the slotting height of the rear-end slotting structure.

Preferably, the difference of the height of the two adjacent slotted structures is H_n+1-H_n＝(1％～15％)H_nIn which H is_n+1Indicating the subsequent slot height, H, of two adjacent slot structures_nIndicating the previous slit height of two adjacent slit structures, cN is a natural number and is more than or equal to 1, so that the interference effect between the gaps caused by the front-end slotted flow guide can be further reduced. In specific implementation, the height difference of the two adjacent slotting structures is 1% -15% of the previous slotting height, when a plurality of slotting structures exist, the height difference of the two adjacent slotting structures is 1% -15% of the multiple slotting structures with the previous slotting height, and in specific implementation, the requirement that the slotting height of the rear-end slotting structure in the multiple slotting structures is larger than the slotting height of the front-end slotting structure is only met, preferably, the height difference of the slotting can be set to be a fixed height, so that the rear-end slotting structure is higher than the fixed height h of the front-end slotting structure, and the h is larger than or equal to 1% of the slotting height of the first slotting structure and is smaller than or equal to 15% of the slotting height of the last slotting structure; meanwhile, preferably, the height difference of the plurality of slotted structures may also be set to be a fixed percentage, that is, the height difference between the slotted height of the subsequent slotted structure and the slotted height of the previous slotted structure is a fixed percentage of the slotted height of the previous slotted structure, the fixed percentage value is between 1% and 15%, and in specific implementation, the percentage may be set to be 1%; the percentage can also be located at 15%. More preferably, the slit structure has a slit height difference of H_n+1-H_n＝(6％～10％)H_n. Through the design of sequentially rising the slotting height, the influence of the rear-end slotting structure on the flow guide of the front-end slotting structure is further reduced. Further optimized, the slotting angle of the slotting structure can be sequentially increased along the direction from the air inlet side to the air outlet side, and the slotting angle A of the slotting structure at the rear end of two adjacent slotting structures is met_n+1Slotting angle A larger than that of front end slotting structure_nThat is, the preferred slot angle is between 15 ° and 45 °. In a specific implementation process, when a plurality of slotted structures exist, the slotted angles of the slotted structures can be increased in an equal ratio; meanwhile, the angle can be increased in turn according to a fixed angle; the further optimized slotting angle is set between 22 degrees and 28 degrees, the design that the rear end slotting angle is larger than the front end slotting angle further reduces the influence of the rear end slotting structure on the flow guide of the front end slotting structure, and meanwhile, the different designs of the slotting angles promote the slotting structure in the fins on turbulent flowAnd the participation degree improves the heat exchange efficiency of the fins. Further preferably, the width of the slot structure is not changed from the air inlet side to the air outlet side, the torsion angle of the fin at the slot structure is sequentially increased from the air inlet side to the air outlet side, the requirement that the torsion angle at the rear end slot structure of two adjacent slot structures is larger than that at the front end slot structure is met, and the preferred torsion angle is 15-45 degrees. In a specific implementation process, when a plurality of slotted structures exist, the torsion angles of the slotted structures can be increased in an equal ratio; meanwhile, the angle can be increased in turn according to a fixed angle; a further optimized torsion angle is set between 22 ° and 28 °; furthermore, the length of the slot structure is sequentially increased along the direction from the air inlet side to the air outlet side; the structural design improves the participation degree of the slit structure in the fin to the turbulent flow, and improves the heat exchange efficiency of the fin. Preferably, the length of the seam structure is sequentially increased along the direction from the air inlet side to the air outlet side, so that the height of the rear end seam structure is increased; further preferably, the air inlet of the slotted structure may be configured to be arc-shaped. Further preferably, the fin is provided with at least one row of heat exchange tube holes, and at least one group of slotted structures is arranged between every two adjacent tube holes.

Above-mentioned embodiment has solved among the prior art symmetry and has set up, because of wind gets into for one end, the fin structure of symmetrical formula design leads to the problem of the increase of wind resistance coefficient when by the unable effective air inlet of one side of wind, simultaneously to slotting height, the angle of slotting, the torsion angle of slotting structure department and the further optimization of the structure of slotting the structure air intake, the rear end that makes the structure of slotting is slotted and is influenced by the water conservancy diversion that the front end slotted the structure and reduce by a wide margin, the structure of slotting of fin to the participation of vortex has been promoted simultaneously, the heat exchange efficiency of effectual improvement fin.

Example 2

This embodiment provides a fin, such as the fin shown in fig. 5 to 7, having one set of the slit structures described in embodiment 1, while being provided with another set of slit structures symmetrically disposed with respect to the set of slit structures in the direction of wind flow. Compared with the prior art, the fin slotting machine has the advantages that the slotting structure such as the slotting height, the slotting angle, the torsion angle at the slotting structure and the air inlet of the slotting structure is further optimized, the influence of the rear end slotting of the slotting structure by the diversion of the front end slotting structure is greatly reduced, the participation degree of the slotting structure of the fin on turbulence is improved, and the heat exchange efficiency of the fin is effectively improved.

Example 3

This embodiment provides a heat exchanger comprising the fin described in embodiment 1 and/or embodiment 2 above.

This embodiment is through the further optimal design to the fin structure of cracking, for prior art, the influence of the water conservancy diversion effect of front end structure of cracking to the rear end structure of cracking among the current fin structure has been reduced, simultaneously through to the crack height, the angle of cracking, the torsion angle of structure department of cracking and the further optimization of the structure of cracking of structure air intake of cracking, the rear end that makes the structure of cracking is slotted and is influenced by the water conservancy diversion of front end structure of cracking and is reduced by a wide margin, the structure of cracking that has promoted the fin simultaneously is to the participation of vortex, the heat exchange efficiency of effectual improvement fin.

The drawings referred to above and the detailed description of the invention, which are exemplary of the invention, serve to explain the invention without limiting the meaning or scope of the invention as described in the claims. Accordingly, modifications may be readily made by those skilled in the art from the foregoing description. Further, those skilled in the art may delete some of the constituent elements described herein without deteriorating the performance, or may add other constituent elements to improve the performance. Further, the order of the steps of the methods described herein may be varied by one skilled in the art depending on the environment of the process or apparatus. Therefore, the scope of the present invention should be determined not by the embodiments described above but by the claims and their equivalents.

While the invention has been described in connection with what is presently considered to be practical embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A fin, characterized by: the fin forms a set of structure that cracks at least along its air inlet side to air-out side direction, the direction of opening a seam of structure all faces the air inlet side and the height of opening a seam of structure that cracks rises along air inlet side to air-out side direction in proper order.

2. A fin according to claim 1, wherein: the slotting height difference of two adjacent slotting of the slotting structure is H_n+1-H_n＝(1％～15％)H_nN is a natural number, and n is greater than or equal to 1.

3. A fin according to claim 2, wherein: the slotting height difference of the slotting structure is H_n+1-H_n＝(6％～10％)H_n。

4. A fin according to claim 3, wherein: the slotting angle of the slotting structure is sequentially increased along the direction from the air inlet side to the air outlet side.

5. A fin according to claim 1, wherein: the width of the slot structure is unchanged along the direction from the air inlet side to the air outlet side, and the torsion angle of the fins at the slot structure is sequentially increased along the direction from the air inlet side to the air outlet side.

6. A fin according to claim 5, wherein: the length of the seam structure is sequentially increased along the direction from the air inlet side to the air outlet side.

7. The fin of claim 6, wherein the slotted structure air inlet is arcuate.

8. A fin according to any one of claims 1 to 7, wherein: the fin is at least provided with a row of heat exchange tube holes, and at least one group of slotted structures is arranged between every two adjacent tube holes.

9. A fin according to claim 8, wherein two sets of said slotted structures between each adjacent two tube holes are provided, and wherein said two sets of slotted structures are symmetrically disposed.

10. A heat exchanger, characterized by: provided with a fin according to any one of claims 1 to 9.