JPS5923987Y2 - 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 constructed by mutually disposing integral side plates 2A and 2B obtained by press-molding a plate-like body into a fixed shape.

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... Protrusions 4A, 4A... extending in the longitudinal direction at the central part in the width direction
... is formed, and side wall portions 5A, 5A.
It is formed by...

The same goes for the other side plate 2B, 3B, 3B...
. . . are uniform width unit plate portions, 4B, 4B . . . are protrusions, and 5B, 5B . . . are side wall portions.

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° inside. 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 and 1, the structure is such that the protrusions 4A and 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. In the case where a heat exchanger is constructed by using a heat exchanger, it is not possible to increase the passage cross-sectional ratio of the two fluids flowing through the two passages 7 and 8.

Even if the height ratio of the protrusions 4A, 4B is changed, the channel cross-sectional ratio does not change much, and the side plates 2A, 2 are manufactured using one press mold.
When using B, only a single pattern of cross-sectional shape can be obtained, and furthermore, the high temperature fluid is cooled at both side edges of element 1 due to the influence of outside air, worsening the thermal balance inside element 1. It had drawbacks.

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 of the equal width unit plate parts 12A, 12A... has protrusions 13A, 13A extending in the longitudinal direction at the center of the outer surface width direction thereof.・and has side wall portions 14A, 14A... on both side edges thereof.
It has...

Further, on one side edge of one side plate 11A, another unit plate part 15A having a narrower width than the above-mentioned equal width unit plate parts 12A, 12A, etc. is integrally formed, and on both side edges thereof. Swelling portions 16A, 16A extending in the longitudinal direction are formed.

17A and 17A are side wall portions of another unit plate portion 15A.

The same goes for the other side plate 11B, 12B, 1
2B... is a uniform width unit plate part, 13B, 13B...
... are protrusions, 14B, 14B... are the side walls of the equal width unit plate parts 12B, 12B..., 15B are other unit plate parts, 16B, 16B are the swelling parts , 17 B, 17
B is a side wall portion of another unit plate portion 15B.

In this embodiment, the other unit plate parts 15A and 15B are not provided with a protrusion, and the width thereof is equal to the width of the unit plate part 12A...
..., protrusion 13A in 12B...
..., 13B... and its outer edge.

The element 10 includes these pair of side plates 11A and 11B.
Equal width unit plate parts 12A and 12B and another unit plate part 1
5A and 15B 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, each element) 10.10...
A plurality of first flow paths 18, 19, and 18, 19, and 19 formed inside the
...and each elmmen) 10゜10...
Protrusions 13A..., 13B... in between
A plurality of second channels 20, 20, 21...
...A different type of fluid is flowed through each.

A pair of elmmen polymerized with each other) 10.10...
...In between, the protrusion 1 of one element 10
The tops of 3A... or 13B... are brought into contact with the groove S of the other elmmen (10).

According to such a heat exchanger, the second flow path 20.20.

21... all have the same cross-sectional area, the thermal balance inside the element is improved compared to the conventional one explained in FIG.

In particular, due to the swelling portions 16A and 16B, the cross-sectional area of the first passages 18, 19 close to the heat exchanger casing increases and the fluid flow rate flowing therein increases. Since the cross-sectional area of the second flow path 20.20 becomes smaller and the flow rate of fluid flowing therein decreases, the high temperature fluid flows through the first flow path 18.19 and the second flow path 20.2
The thermal balance is further improved by flowing a low-temperature fluid through the tube.

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 abuts the valley groove S of the adjacent element and expands. The portions 16A and 16B come into contact with each other, and passages for different types of fluids are created inside and outside each element, respectively, independently of each other.

What is important here is that due to the existence of the unit plate parts 15A and 15B, 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 the exchanger can be manufactured 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, due to the presence of the bulging portions 16A and 16B, flow passages with large cross-sectional areas are formed on both side edges of the element, resulting in a structure that is less susceptible to external heat influences.

If the swelling parts 16A and 16B were not present, the temperature rise rate would be different between the central part and both side parts, especially at the outlet of the fluid to be heated.The central part would reach a predetermined temperature, but the temperature would reach a predetermined temperature at both side parts. This is a problem because it tends to not reach the temperature.

In contrast, in the present invention, this problem does not occur due to the bulges 16A and 16B.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a heat exchanger using a conventional element.
FIG. 2 is a sectional view of a heat exchanger using an element according to an embodiment of the present invention, and FIG. 3 is a perspective view thereof. 10...Element, 11A, 11B...
...Side plate, 12A. 12B... Equal width unit plate part, 13A, 13B...
... Protrusions, 14A, 14 B, 17 A, 17
B... Side wall part, 15A, 15B... Another unit plate part, 16 A, 16 B... Swelling part, 1
8.19...First channel, 20.21...
-Second flow path, S...groove.

Claims (1)

[Claims for Utility Model Registration] It has a pair of side plates 11A and 11B, and each side plate 11A
. A plurality of equal-width unit plate portions 12A are formed by forming grooves S at regular intervals along the width direction of 11B. 12B, and protrusions 13A and 13B extending in the longitudinal direction are formed at the center of the outer surface width direction of each equal width unit plate portion 12A and 12B, and equal width unit plates are formed on one side edge of each side plate 11A and 11B. Unit plate portion 15A is narrower than portions 12A and 12B. 15B, and extends in the longitudinal direction on the outer side edges of the unit plate parts 15A, 15B and the other side edges of the side plates 11A, 11B.
6A and 16B are formed, and unit plate portions 12A and 12B of equal width on both side plates 11A and 11B are connected to each other, and unit plate portion 15A is formed.
, 15B and the swelling portions 16A, 16B are opposed to each other, and the grooves S are joined to each other. ) 10 protrusions 13A, 13A adjacent element 1
An element of a plate type heat exchanger, characterized in that it is brought into contact with a groove S of 0.