JP2001194086A - Fin for heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency in heat exchange by increasing the effective area of a heat transfer fin having a contact with an upper flat plate as a vertex and a contact with a lower flat plate as a bottom point, and at the same time complicating the form of the fins, and tightening the arrangement of connection plates. SOLUTION: This fin comprises an oblique wall 23 which connects a bottom 21 with a vertex 22, an upper oblique part 24 inclining from the vertex 22 in the direction orthogonal to the inclination of the oblique wall 23, a vertical part 25 connected to the lower part of the upper oblique part 24, a vertical wall 27 including a lower oblique part 26 which is connected to the bottom 21 of another oblique wall 23 adjacent to the extension of the wall 23. The ridges of the vertex 22 and the bottom 21 are in contact respectively with an upper flat plate 40 and a lower flat plate 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat transfer fin for a heat exchanger, and more particularly to an improvement in a corrugated heat transfer fin interposed between a pair of parallel plates forming a fluid flow path.

[0002]

2. Description of the Related Art Conventionally, corrugated heat transfer fins for forming irregularities have been used in a flow path of a heat exchanger in which a flat plate is laminated and a space formed between the flat plates is used as a flow path of a fluid. ing. For example, as shown in FIGS.
Are interposed between the upper flat plate 2 and the lower flat plate 3, and are arranged in a staggered manner at predetermined intervals and arranged in parallel with each other. And a plurality of upright walls 6, 8 which rise substantially vertically and are integrally provided. Upper plate portion 4, upright wall 6 or 8, lower plate portion 5
Form a wave as a whole, and the upright walls 6, 8
The phase is in the wavelength direction (downward right in the figure).

The heat transfer fins 1 of this kind are formed by cutting slits 9 in a zigzag pattern at a predetermined width interval on a single plate and bending them to form a large number of openings 10 orthogonal to the wavelength direction. Things. The fluid flows in the wavelength direction or the direction perpendicular to the heat transfer fins 1 thus formed.

[0004]

However, there are actually the following technical problems. That is, in the conventional heat transfer fin 1 described above, the area of the upper plate portion 4 and the lower plate portion 5 that are in contact with the upper plate 2 and the lower plate 3 is large, and does not work effectively as heat exchange of the heat transfer fin 1. In order to improve the heat exchange efficiency of the heat transfer fins 1, the heat transfer area must be increased, which requires a complicated connection plate for connecting the upper plate portion 4 and the lower plate portion 5. However, since the upper plate 4 and the lower plate 5 are connected by the upright walls 6 and 8, there is a problem that the shape is simple and not dense.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and increases the effective area of the heat transfer fins by using the points where the heat transfer fins are in contact with the upper plate and the lower plate as the top and bottom points. An object of the present invention is to provide a heat transfer fin in which the shape is complicated and the arrangement of connection plates is made dense to improve heat exchange efficiency.

[0006]

In order to achieve the above object, the present invention provides a fin for a heat exchanger interposed between a pair of parallel plates forming a fluid flow path, wherein one of the plates has a fin. It is characterized by comprising a plurality of inclined walls connecting a bottom part in line contact with a top part in line contact with the other plate (claim 1). In the present invention,
There may be provided a vertical wall connecting the top of the inclined wall and the bottom of the inclined wall adjacent to the inclined wall (Claim 2), or adjacent to the inclined wall in a direction orthogonal to the extension direction of the inclined wall. An inclined wall inclined in a direction intersecting with (claim 3),
It is preferable that the vertical wall has an upper inclined portion or a lower inclined portion which is inclined at least at one of the top portion and the bottom portion toward a top portion or a bottom portion of the inclined wall in a direction intersecting with the inclination direction of the inclined wall ( Claim 4).

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a heat transfer fin according to the present invention, and FIG. 2 is a side view of the heat transfer fin.

As shown in FIG. 1 and FIG. 2, the heat transfer fin 20 is formed by an inclined wall 2 connecting a bottom 21 and a top 22.
3, an upper inclined portion 24 inclined from the top 22 in a direction orthogonal (intersecting) to the inclination direction (downward right in FIG. 2) of the inclined wall 23, and a vertical portion connected to a lower portion of the upper inclined portion 24. 25, connected to the lower part of the vertical part 25, the inclined wall 2
3 is provided with a vertical wall 27 composed of a lower inclined portion 26 connected to the bottom 21 of another inclined wall 23 adjacent in the extension direction (the horizontal direction in FIG. 2) and inclined in a direction parallel to the upper inclined portion 24. The inclined wall 23 and the vertical wall 27 constitute a first connecting plate 29 having a predetermined width that is continuous in a waveform along the extending direction.

The heat transfer fins 20 are provided adjacent to the direction perpendicular to the direction in which the inclined wall 23 extends (the direction orthogonal to the plane of FIG. 2) and connect the bottom 28 and the top 32 to each other. And a vertical wall 37 including an upper inclined portion 34 inclined from the top portion 32 in a direction orthogonal to the inclined direction of the inclined wall 33, a vertical portion 35 connected to a lower portion thereof, and a lower inclined portion 36 connected to a lower portion thereof. Is provided. The inclined wall 33 and the vertical wall 37 constitute a second connecting plate 39 having a predetermined width that is continuous in a waveform along the extension direction.

The first and second connecting plates 29 and 39 are connected by using the bottom portions 21 and 38 or the bottom portions 28 and 31 in common, and are arranged in phase only by the width portion 30 of the first connecting plate 29. Both connecting plates 29 and 30 are alternately and repeatedly arranged. Also, the inclined walls 23 and 33, the upper inclined portions 24 and 34,
The vertical portions 25 and 35 and the lower inclined portions 26 and 36 have a rectangular shape.

The heat transfer fins 20 are interposed between an upper flat plate 40 and a lower flat plate 41 which use a space formed between the pair of plates as a fluid flow path of the heat exchanger.
The top 22 and 32 and the bottom 21 and 31 of
The ridge lines are in line contact with the 0 and the lower flat plate 41, respectively.

In the above configuration, the fluid flows in a direction perpendicular to the corrugations of the first and second connecting plates 29 and 30 (in a direction perpendicular to the plane of FIG. 2), but the heat transfer fins 20 move upward. Since the portions contacting the flat plate 40 and the lower flat plate 41 are not in surface contact but in line contact, the thermal resistance is reduced, the effective area of the heat transfer fin is increased, and the shape of the heat transfer fin is complicated. As a result, the heat exchange efficiency can be greatly improved.

[0013]

According to the above construction, the portions where the heat transfer fins are in contact with the plates (upper and lower plates) are in line contact with the top and bottom portions, so that the heat resistance is reduced and the heat transfer fins are reduced. The effective area of the heat transfer fins can be increased, and the heat transfer fins can be made more complicated, and the heat exchange efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat transfer fin according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a view showing a conventional heat transfer fin.

FIG. 4 is a side view of FIG. 3;

[Explanation of symbols]

 21, 28 Bottom 22, 32 Top 23, 33 Inclined wall 24, 34 Upper inclined portion 25, 35 Vertical portion 26, 36 Lower inclined portion 27, 37 Vertical wall 29 First connection plate 31, 38 Bottom 39 Second connection Board

Claims (4)

[Claims] 1. A fin for a heat exchanger interposed between a pair of parallel plates forming a fluid flow path, wherein a bottom portion in line contact with one plate and a top portion in line contact with the other plate are connected. A fin for a heat exchanger, comprising: a plurality of inclined walls; 2. The heat exchanger fin according to claim 1, further comprising a vertical wall connecting a top portion of the inclined wall and a bottom portion of the inclined wall adjacent to the inclined wall. 3. The heat exchanger according to claim 1, further comprising an inclined wall adjacent to a direction orthogonal to an extension direction of the inclined wall and inclined in a direction intersecting the inclined wall. fin. 4. The vertical wall has an upper inclined portion or a lower inclined portion which is inclined at least at one of a top portion and a bottom portion toward a top portion or a bottom portion of the inclined wall in a direction intersecting with the inclined direction of the inclined wall. 2. The method according to claim 1, wherein
4. The fin for a heat exchanger according to any one of items 1 to 3.