JPH0144959Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The invention relates to an improvement in a plate heat exchanger consisting of a plurality of plates stacked one on top of the other to form alternating passages for the heat exchange medium between them.

[Conventional technology]

Conventionally, this type of heat exchanger consists of two types of plates that are alternately arranged palm-to-bottom via gaskets so as to alternately form passages that do not communicate with each other for both heat exchange media. It consists of a pair of frames that are tightened with bolts and nuts.

Therefore, two types of molds are required to produce two types of plates, which increases manufacturing costs, and the plate produced by each mold is a mirror image of the plate produced by the other mold. It is difficult to match the plate heat exchanger as shown in FIG.

Therefore, in order to eliminate the above-mentioned drawbacks, a plate heat exchanger constructed of only one type of plate is disclosed in Japanese Patent Application Laid-Open No. 55-96893. This known plate heat exchanger is stacked and has two
forming alternate passages for two heat exchange media, and
It is composed of a plurality of one type of plates each having two openings formed on both sides for guiding the medium to and from each passage, and a corrugated part of a predetermined shape, and the adjacent plates are arranged in a plane. The plates are arranged by rotating 180 degrees, and each plate is aligned palm-to-palm with a gasket interposed therebetween, and then assembled between the frames using bolts and nuts.

[The problem that the idea aims to solve]

According to the conventional plate heat exchanger, which consists of one type of plate, one mold is used to manufacture the plate.
However, the structure is not one in which each plate is joined together, but each plate is arranged palm-to-edge through a gasket and assembled to the frame, which increases the number of parts and increases the cost. In addition, there was a problem in that the weight was heavy and the plates were misaligned during assembly, making it impossible to obtain high rigidity.

[Means to solve the problem]

The present invention was proposed in view of the above-mentioned problems, and consists of stacking layers to alternately form passages for two heat exchange media between them, and supplying media to and from each passage on both sides. Consisting of a plurality of plates of one kind each forming two openings for guiding and corrugated portions abutting each other to form a support point in the passageway between adjacent plates; The plates are arranged with the front and back and top and bottom reversed, and the plates are joined to each other around their peripheries and around the opening, and the plates located at at least the outer ends of both sides among the plurality of plates are connected to each other. The outer end plate and the adjacent plate are joined together at the support point.

[Effect]

According to the present invention, the plates arranged in a palmar arrangement are joined together like mirror images, and high rigidity can be obtained while reducing the number of parts.

〔Example〕

In FIG. 1, the plate 1 is provided with a ridge 3 extending along the outer periphery and inside the peripheral edge 2 so as to surround the heat transfer surface. This ridge 3 appears as a groove 4 when viewed from the back side of the plate. Each plate 1 is provided with four openings 5 to 8 allowing the passage of a heat exchange medium. On the heat transfer surface of the plate 1, diagonally arranged corrugated portions 9 are formed as shown. In addition,
The corrugated portion may also have a herringbone shape.

As shown in FIG. 2, the plurality of plates 1 are reversed between adjacent plates (that is, one plate is rotated 180 degrees around its long axis), and
Turn them upside down (that is, rotate them 180 degrees on the plane of the plate) and bring your palms together. As a result, as shown in FIG. 3, the peripheral edge 2 or the ridge 3 of the plate 1 abuts the peripheral edge 2 or the ridge 3 of the adjacent plate 1 (in the drawing, for convenience of illustration, they are slightly separated). Specify the spacing between. Furthermore, between adjacent plates that are joined together in the manner described above, the corrugations 9 extend in different directions, thus providing support points 10 at their intersecting positions. Note that the number of plates 1 is appropriately selected so as to obtain a heat exchanger with a desired capacity.

With their palms clasped together as described above, the third
The parts indicated by thick short lines in the figure and Fig. 4 are brazed. As a result of this brazing operation, the adjacent plates 1 are separated along the periphery 2 or the ridges 3 and also along the openings 5.
Around ~8, they are joined together.
Furthermore, at least one pair of adjacent plates located at each outer end are joined together at the intersections of the corrugated portions 9, that is, at the above-mentioned support points 10.

Alternate passages for the two heat exchange media are thus formed between the plates. That is, in FIGS. 3 and 4, one medium a flows into the first passage A through the opening 5 or 6, which is the inlet of the medium a, and flows out through the opening 6 or 5, which is the outlet of the medium a. The other medium b enters the second passage B through the opening 7 or 8, which is the inlet of medium b, and flows out through the opening 8 or 7, which is the outlet of medium b. Note that 11 is attached to the openings 5 to 8 of the outermost plate.
It is a tube connected to piping for supplying and discharging heat exchange medium. In the plate located at the outer end where the tube body 11 is not provided, the openings 5 to 8 are closed.

The plate heat exchanger of this invention does not use gaskets, and at least the outermost pair of adjacent plates are joined together by brazing at the support points, so it has high rigidity. and therefore eliminates the need for a conventional frame. This greatly contributes to reducing the weight and cost of the plate heat exchanger.

In addition, as mentioned above, when joining at a support point is performed only for the outermost pair of adjacent plates, operations such as brazing become simpler and this also contributes to reducing manufacturing costs. Depending on the strength required of the heat exchanger, this can be done, for example, between two or more sets of adjacent plates, or even between all sets of adjacent plates.

[Effect of idea]

Since the plate heat exchanger of this invention is composed of only one type of plate, only one mold is required for manufacturing the plates, and there is no need for gaskets or frames, reducing the number of parts.
It is possible to significantly reduce manufacturing costs and reduce weight. In addition, since the adjacent plates are formed into a block shape by joining together so that they are mirror images of each other, dimensional accuracy can be improved and high rigidity can be obtained. In addition, since the adjacent plates are joined together around the periphery and opening of each plate, and at the support points of a set of adjacent plates located at least at each outer end of the plurality of plates, the number of joining points is reduced. The joining operation is simple and workability can be greatly improved, and manufacturing costs can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention. Fig. 1 is a plan view of the plates constituting the plate heat exchanger, Fig. 2 is a perspective explanatory view showing how the plates are assembled, and Fig. 3 is a plan view of the plates constituting the plate heat exchanger. A cross-sectional view of the plate heat exchanger taken along the - line in the figure, Figure 4 is the - of Figure 1.
FIG. 3 is a cross-sectional view of the plate heat exchanger along a line. 1...Plate, 2...Periphery, 4...Groove, 3...
...Ridge, 5-8...Opening, 9...Corrugated portion, 10...
Support point, 11...tube, A, B...medium passage.

Claims (1)

[Claims for Utility Model Registration] Laminated to form alternate passages for two heat exchange media between each other, and two openings on both sides for guiding the medium to and from each passage, respectively. comprising a plurality of one type of plates with corrugated portions forming and abutting against each other to form support points in the passageway, the adjacent plates being turned upside down with respect to each other, and Arranged upside down, the plates are joined together around their peripheries and around the opening, and a plate located at at least an outer end on both sides among the plurality of plates and a plate adjacent to the outer end plate. A plate heat exchanger, characterized in that: and are joined together at the support point.