CN109945723A - Fins and Heat Exchangers - Google Patents

Abstract

The invention provides a fin and a heat exchanger. The fin includes a fin body, and the fin body is evenly provided with a plurality of through holes for nesting the base tube, and between the adjacent through holes in the horizontal direction The embossed pattern group is arranged horizontally, and the embossed pattern group includes an upper embossed pattern and a lower embossed pattern. Both the upper embossed pattern and the lower embossed pattern are raised from the surface of the fin body, and openings are formed on both sides of the lateral side; heat exchange The device includes a base tube and the aforementioned fin body. By improving the structure of the fins, the invention increases the friction between the fluid and the fins, increases the disturbance, and significantly enhances the heat exchange effect.

Description

Fins and Heat Exchangers

technical field

The invention belongs to the technical field of fin-and-tube heat exchangers, and in particular relates to a fin and a heat exchanger containing the fin.

Background technique

The fin-and-tube heat exchanger is the most widely used heat exchange equipment in gas and liquid exchangers, and is the most common heat exchanger in refrigerators. As shown in Figure 1, the fin-and-tube heat exchanger achieves the purpose of enhancing heat transfer by adding fins 2 on the common base tube 1.

In order to greatly increase the heat exchange area, plate-shaped plate-fin heat exchange fins are mostly used in the prior art, which mainly have the following disadvantages: the plate-fin type fins are smooth, the fluid flow direction is parallel to the fins, and the fluid flows through the plate fins. When the fins are used, the flow characteristics are in a laminar state, the friction between the fluid and the fins is small, and the disturbance is small, so that the fins and the fluid cannot fully exchange heat.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide a fin that can sufficiently exchange heat with a fluid (such as flowing air).

The present invention also provides a heat exchanger containing the fins.

A first aspect of the present invention provides a fin, comprising a fin body, the fin body is uniformly provided with a plurality of through holes for nesting a base tube, and between adjacent through holes in a horizontal direction transversely provided The embossed pattern group includes an upper embossed pattern and a lower embossed pattern. Both the upper embossed pattern and the lower embossed pattern are raised from the surface of the fin body, and an opening is formed on one lateral side.

A second aspect of the present invention provides a heat exchanger including the fin, which includes a base pipe and the above-mentioned fin body.

By improving the structure of the fins, the invention increases the friction between the fluid and the fins, increases the disturbance, and significantly enhances the heat exchange effect.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

Fig. 1 is the structural representation of the fin-and-tube heat exchanger in the background technology;

Fig. 2 is the structural representation of the fin in the present invention;

FIG. 3 is a schematic structural diagram of a heat exchanger in the present invention.

Detailed ways

Referring to FIG. 2 , a fin provided by the present invention includes a fin body 3 . The fin body 3 is evenly provided with a plurality of through holes 4 for nesting the base tube, and adjacent through holes 4 in the horizontal direction A set of embossed patterns 5 is arranged laterally between them. The embossed pattern group 5 includes an upper embossed pattern 51 and a lower embossed pattern 52. The upper embossed pattern 51 and the lower embossed pattern 52 are raised from the surface of the fin body 3, and the lateral Openings 53 are formed on both sides. (The above-mentioned surface bulges include bulges on the same surface or bulges on both sides respectively, and the above-mentioned lateral side includes the opposite or opposite side of the upper embossed pattern 51 and the lower embossed pattern 52. The accompanying drawing corresponding to this embodiment is the upper convex The embossed pattern 51 and the lower embossed pattern 52 are raised on the same side of the fin body 3, and the opposite side forms an opening 53.)

Its working principle is: the fin body 3 is provided with a plurality of embossed pattern groups, which not only increases the heat exchange area of the fin body 3, but also is superior to the flat fins (that is, the plate described in the background art) in terms of heat exchange. Fin-type heat exchange fins), in addition, the flowing air constantly changes direction in it, and more air scours the cross-section of each embossed pattern, which increases the turbulence and significantly enhances the heat exchange effect.

In this embodiment, there are at least three upper embossing patterns 51, and the lengths of the upper embossing patterns 51 decrease sequentially from the direction away from the lower embossing patterns 52 to the direction close to the lower embossing patterns 52; The number of embossed patterns 51 is the same. From the direction away from the upper embossed pattern 51 to the direction close to the upper embossed pattern 51, the length of the lower embossed pattern 52 decreases successively, and the length is the same as that of the upper embossed pattern 51 respectively. The purpose is to provide at least three upper embossed patterns 51 and lower embossed patterns 52 so that the area of the fin body 3 occupied by the embossed pattern groups is sufficiently large to ensure the reliable realization of heat exchange and turbulence effects.

In this embodiment, both sides of the fin body 3 along the length direction are provided with wave-shaped embossing patterns 6 . The purpose is to further increase the heat exchange area of the fin body 3, and to make the flowing air realize a sudden change in speed at the crests and troughs of the wave-shaped embossing 6, which further increases the turbulence effect and makes the heat exchange effect more effective. good.

In this embodiment, the through hole 4 is provided with a wide wrapping edge 7 along the edge of the hole, and the wide wrapping edge 7 is tightly wrapped on the outer wall of the base pipe 1 . The purpose is to increase the contact area between the fin body 3 and the base tube 1, improve the heat exchange effect, and also improve the firmness of the connection structure, so that the product performance is more stable and reliable.

In this embodiment, the fin body 3 can be made of a metal material used for heat exchanger fins in the prior art, preferably a synthetic material with good thermal conductivity and ductility (non-toxic, environmentally friendly, high corrosion resistance) production.

Referring to FIG. 3 , the present invention further provides a heat exchanger containing the fin, which includes a base pipe 1 and the above-mentioned fin body 3 . The drawing of this embodiment shows the arrangement of multiple groups of fin bodies 3 in parallel and spaced apart, and the arrangement in which the base pipes 1 are inserted vertically. The heat exchanger formed by the fin body 3, or by changing the length and shape of the base pipe 1, etc., can be adjusted according to actual needs, so this embodiment will not be repeated.

The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims (5)

1. a kind of fin, including fin body, uniformly offered in fin body multiple for being set with the through-holes of base tube, feature Be: being transversely provided with convex embossing group between upper adjacent through-hole in the horizontal direction, convex embossing group include convex embossing and Under convex embossing, convex embossing and under convex embossing from the surface elevation of fin body, lateral side is respectively formed opening.

2. fin according to claim 1, it is characterised in that: the convex embossing is at least three, from far under it is convex Embossing is on the direction of convex embossing, the length of convex embossing is sequentially reduced under；Under described convex embossing with it is convex The item number of embossing is identical, from far from convex embossing to close to convex embossing direction on, under convex embossing length according to Secondary reduction, and length respectively corresponded with convex embossing it is identical.

3. fin according to claim 1 or 2, it is characterised in that: the both sides of the fin body along its length are equipped with Waveform embossing.

4. fin according to claim 1 or 2, it is characterised in that: the through-hole turns up along hole edge and is equipped with wide bound edge, Wide bound edge abutting is wrapped on the outer wall of base tube.

5. a kind of heat exchanger, including base tube and the fin being set on the base tube, it is characterised in that: the fin is claim Fin described in any one of 1-4.