JPS5941428Y2 - Plate heat exchanger element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an element for a plate heat exchanger.

An element 1 of a conventional plate heat exchanger will be explained based on FIG.

The element 1 is composed of a pair of side plates 2A and 2B, which are obtained by pressing a plate-shaped body into a fixed shape and disposed opposite each other.

For example, one side plate 2A is divided into a plurality of equal width unit plate parts 3A, 3A... in the width direction, and each of these equal width unit plate parts 3A, 3A... has a central part in the width direction. Projections 4A, 4A, . . . extending in the longitudinal direction are formed, and side wall portions 5A, 5A, .

The same goes for the other side plate 2B, 3B. 3B...
is a uniform width unit plate part, 4B, 4B... is a protrusion, 5B, 5
B... is a side wall portion.

The element 1 includes a pair of left-right symmetrical side plates 2A, 2.
B are placed opposite each other, their both side edges are aligned, and the contact portions 6 of the side walls 5A, 5B of the equal width unit plate portions 3A, 3B facing each other are welded, thereby creating a plurality of parallel flow channels 7. 7.
It is produced by configuring...

The thus obtained elements 1 are made by aligning a plurality of elements at both side edges and overlapping them, and then stored in a heat exchanger casing.

Therefore, between the mutually overlapping elements 1, 1, the structure is such that the protrusions 4A, 4B are butted against each other.

Conventionally, the reason why element 1 was configured as described above is as follows.
This was for the convenience of press work when forming the side plates 2A and 2B.

The conventional element 1 has advantages for the manufacturing side in that it is convenient for pressing work because it has a symmetrical shape, but on the other hand, the performance of the element 1 itself is that it is difficult to overlap each other. When a heat exchanger is configured by using the two channels 7 and 8, the flow path cross-sectional ratio of the two fluids flowing through the two flow paths 7 and 8 cannot be made large, or the protrusions 4A and 4
Even if the height ratio of B is changed, the channel cross-sectional ratio does not change much.

Furthermore, when using the side plates 2A and 2B manufactured using one press mold, there is a drawback that only a single pattern of cross-sectional shape can be obtained.

The present invention has been devised in view of the above points, and an embodiment thereof will be described below based on FIG. 2.

Reference numeral 10 denotes an element, which is composed of a pair of side plates 11A and 11B press-molded into a fixed shape.

One side plate 11A has a plurality of equal width unit plate parts 12A, 1 formed by grooves S formed at regular intervals along its width direction.
2A... and each equal width unit plate part 12A
, 12A... is a protrusion 13A extending in the longitudinal direction at the center of the outer surface in the width direction.

13A... and side wall portions 14A on both side edges thereof.
, 14A...

A large number of protrusions 1 are provided on the flat parts on both sides of the protrusions 13A, 13A... in the equal width unit plate parts 12A, 12A...
5A, 15A... are formed.

Further, on one side edge of one side plate 11A, another unit plate part 16A having a narrower width than the above-mentioned equal width unit plate parts 12A, 12A...
17A and 17A which are integrally formed are separate unit plate parts 1.
This is the side wall portion of 6A.

The same goes for the other side plate 11B, 12B, 12
B... are equal width unit plate parts, 13B, 13B... are protrusions, 14B, 14B... are equal width unit plate parts 12B, 12B
The side wall portions of..., 15B, 15B... are protrusions, 1
6B is another unit plate part, 17B, 17B are another unit plate part 1
This is the side wall portion of 6B.

In this embodiment, the other unit plate parts 16A, 16B are not provided with any protrusions, and their widths are set to the same width unit plate parts 12A, . . . .

Projections 13A..., 13B... in 12B...
and its outer edge.

The element 10 includes equal width unit plate portions 12A and 12B of these pair of side plates 11A and 11B and another unit plate portion 16.
A and 16B are placed opposite each other, and the valley grooves S are welded to each other.

The thus obtained elements 10 are configured as a heat exchanger by alternately inverting a plurality of elements and aligning both ends of each element and overlapping them.

In such a heat exchanger, a plurality of first flow paths 18, 19... formed inside each element 10, 10...,
Projections 13A between each element 10, 10...
A plurality of second channels 20, 2 divided by...13B...
1. Different types of fluids are flowed through each of them.

A pair of mutually polymerized elements 10.10...
In between, the protrusion 13A of one element 10...
The tops of the elements 10 and 13B are butted against the groove S of the other element 10.

According to such a heat exchanger, the second flow path 20°21...
Since all of the elements have the same cross-sectional area, the thermal balance inside the element is better than that of the conventional element explained in FIG. The heat transfer efficiency is improved because the heat transfer area is larger and the fluid flow can be disturbed.

In addition, by forming the protrusions 15A..., 15B..., the thermal expansion of the elements 10... can be absorbed.

As is clear from the above description, according to the element according to the present invention, by changing the direction of every other element and overlapping each other, each protrusion 13A, 13B can come into contact with the valley groove S of the adjacent element. As a result, passages for different fluids are created independently within each element and outside each element.

What is important here is that due to the existence of the unit plate parts 16A and 16B, even though one type of plate body molded in one mold is combined, the two fluids have different passage cross-sectional area ratios. This means that it is possible to manufacture an exchanger, and the side edges of each element are aligned.

In other words, if the side edges of each element are uneven, an abnormally shaped fluid passage will be formed between the side edge of each element and the casing when each element is placed in the casing, making it impractical for practical use. It becomes something that does not exist.

On the other hand, according to the present invention, a normally shaped fluid passage is formed between the casing and the side edges of each element, and this problem does not occur.

Furthermore, the presence of a large number of protrusions 15A and 15B improves heat exchange efficiency and relieves stress due to thermal expansion.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a heat exchanger using a conventional element.
FIG. 2 is a perspective view of a main part of a heat exchanger using an element according to an embodiment of the present invention. 10...Element, 11A, 11B...
... Side plate, 12A, 12B... Equal width unit plate part,
13A. 13B...Protrusions, 14A, 14B, 17A. 17B...Side wall part, 15A, 15B...
...Protrusions, 16A, 16B...Another unit plate part, 18, 19...First channel, 20, 21...
...Second channel, S...Groove.

Claims (1)

[Claims for Utility Model Registration] It has a pair of side plates 11A and 11B, and each of the individual plates 11A and 1
A plurality of equal-width unit plate parts 12A, 12B are formed by forming grooves S at regular intervals along the biased force in 1B, and each equal-width unit plate part 12A. A protrusion 13 extending in the longitudinal direction at the center of the outer surface in the width direction of 12B
A, 13B are formed, unit plate parts 16A, 16B are integrally formed on one side edge of each side plate 11A, 11B, and the unit plate part 1
The widths of 6A and 16B are set equal to the width between the protrusions 13A and 13B in the equal width unit plate parts 12A and 12B and their outer edges, and the equal width unit plate parts 12A and 12A of the both side plates 11A and 11B are
12B and unit plate portions 16A and 16B are opposed to each other, and the grooves S are joined to each other,
A plurality of elements 10 each having a large number of protrusions 15A and 15B are provided at appropriate positions on each side plate, the elements 10 are arranged parallel to each other, and every other element is inverted, and a protrusion 13A of each element 10 is provided. An element of a plate type heat exchanger characterized in that 13A is brought into contact with a groove S of an adjacent element 10.