JP2000161877A - Plate type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost by manufacturing a plate type heat exchanger by employing one kind of plates molded with pressing and laminating the same. SOLUTION: A heat transfer plate 10 having a continuous uneven surface 12 is formed such that a flat surface configuration is formed into a circular configuration or a polygonal configuration overlapped by rotation by 90 degree, and open holes 15, 16 are formed at a radial position separated by a 90 degree interval from the center of the heat transfer plate 10 with a protruded edge 17 formed on the one open hole 16. The heat transfer plate 10 is rotated by 90 degree to permit the protruded edge 17 to be inserted into the open hole 15 and overlapped thereon by a predetermined number of layers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate heat exchanger formed by laminating a predetermined number of heat transfer plates each having a continuous uneven surface.

[0002]

2. Description of the Related Art In recent years, plate heat exchangers have become widespread in processes such as rapid heating, cooling and reheating in various chemical industries and heating appliances. This plate type heat exchanger is composed of multiple layers of heat transfer plates with continuous irregular surfaces such as corrugated or hemispherical shells formed by pressing a metal plate, and a narrow space between the heat transfer plates. A fluid channel at intervals is formed, and two types of fluid such as liquid-liquid and liquid-gas are alternately circulated through this channel to perform heat exchange. High heat efficiency is achieved by a dramatic increase in the heat transfer area. It will be realized.

[0003]

In such a plate heat exchanger, several types of individually formed plates, such as alternately stacked heat transfer plates, and side plates at both ends for connecting a fluid inlet pipe and an outlet pipe, are used. It is used, and mold cost and manufacturing cost are expensive. Further, when welding the heat transfer plates to be laminated, poor welding is likely to occur due to a shortage of the joint area, and there is a problem in securing strength and airtightness.

An object of the present invention is to solve these problems, and it is possible to use a single type of plate formed by press working and to stack and manufacture the plate, thereby reducing the manufacturing cost. Things. Another object of the present invention is to provide a plate heat exchanger that can be firmly joined by brazing.

[0005]

In order to achieve the above object, a plate heat exchanger according to the present invention has a heat transfer plate having a continuous uneven surface formed into a circular shape or a polygonal shape which is rotated by 90 degrees and overlapped. A planar shape is formed, and two types of openings are formed at radial positions separated by 90 degrees from the center of the heat transfer plate. Then, a protruding edge is formed in one of the openings, the heat transfer plate is rotated by 90 degrees, the protruding edge is inserted into the other opening, and the heat transfer plate is laminated by a predetermined number of layers. With such a configuration, it is possible to manufacture by laminating one type of plate, and it is possible to reduce the number of parts and significantly reduce the manufacturing cost.

According to a second aspect of the present invention, in the plate heat exchanger, the heat transfer plate is formed by pressing a copper plate, and an outer edge having a small inclination angle is formed on an upper edge of a side edge raised on a peripheral edge. The brazing material is inserted into an opening groove formed between the upper and lower outer edges of the formed and laminated heat transfer plate, and brazed. By manufacturing in this manner, workability and joining property of welding can be improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. Figures 1 to 5
In the first embodiment of the present invention, the continuous uneven surface 12 is formed on one surface, the heat transfer plate 10 is formed by pressing a copper plate, the planar shape is formed substantially square, and the uneven surface 12 is linear. Is formed. In addition, the heat transfer plate 10
An outer edge 1 having a small inclination angle is formed on the upper edge of the side edge 11a to form a dish.
1b is formed. 2 at the adjacent corner of heat transfer plate 10
Types of apertures 15, 16 are formed, and these apertures 15, 16
Reference numeral 16 is located at a radial position separated from the center of the heat transfer plate 10 by 90 degrees. In addition, one opening 16 is formed with a ridge 17 by burring the periphery thereof, and the other opening 15 is formed to have a size in which the projection 17 is fitted.

The assembly of the plate heat exchanger is performed as shown in FIG. Here, the heat transfer plate 10b superposed on the heat transfer plate 10a is rotated by 90 degrees, and the lower heat transfer plate 1 is inserted into the opening 15b.
The protruding edge 17a of Oa is inserted and overlapped. Similarly, the heat transfer plate 10c is rotated by 90 degrees with respect to the heat transfer plate 10b, the protruding edge 17b is inserted into the opening 15c, and the heat transfer plate 10c is rotated by 90 degrees with respect to the heat transfer plate 10c. Overlap. In this manner, the heat transfer plates 10 are sequentially rotated by 90 degrees, the protruding edges 17 of the lower heat transfer plate 10 are inserted into the openings 15, and a predetermined number of the heat transfer plates 10 are stacked and assembled. FIG. 4 shows a structure in which thirteen heat transfer plates 10 are stacked and formed. Fluid inlet pipes and outlet pipes 20, 21 and 22 are provided in the openings 15 and 16 of the uppermost and lowermost heat transfer plates 10, respectively. , 23 are joined to form a plate heat exchanger.

The flow of the fluid in the plate heat exchanger will be described. Referring to FIG. 3, the fluid flowing into the space between the heat transfer plate 10a and the heat transfer plate 10b from the opening 15a of the heat transfer plate 10a is paired. The heat is distributed in a square shape and guided from the opening 16b of the heat transfer plate 10b to the protruding edge 17b thereof.
d flows into the gap. Thus, the upper and lower heat transfer plates 10
Since the fluid flows through each of the layers partitioned by, and the protruding edge 17 is inserted into the upper hole 15, the respective layers communicate with the upper and lower layers. Therefore, two kinds of fluids, such as liquid-liquid and liquid-gas, are passed through these alternate layers to perform heat exchange. In each layer, the fluid flows in the diagonal direction, and the fluid flowing in the upper and lower layers via the heat transfer plate 10 becomes an intersecting flow, so that efficient heat exchange is performed.

FIG. 5 illustrates the means for welding the plate heat exchanger. As described above, the peripheral edge of the heat transfer plate 10 is formed in two steps with the side edge portion 11a and the outer edge portion 11b, and the upper and lower outer edge portions 11b of the stacked heat transfer plate 10 are formed.
An opening groove is formed between them. A rod-shaped brazing material 19 is inserted into the opening groove, and an opening 1 is formed in each heat transfer plate 10.
A sheet-shaped brazing material 18 having holes suitable for 5, 16 is laid, fixed with a predetermined jig, and brazed in an electric furnace. The wax melted in the furnace flows into and welds between the side edges 11a by capillary action, and each heat transfer plate 1
It flows into and welds to the point-contact portion of the zero uneven surface 12. Note that a ring-shaped brazing material may be wound around the outer periphery of the protruding edge 17 and brazed.

FIG. 6 shows another embodiment of the present invention in which the heat transfer plate 10 has a circular planar shape. This heat transfer plate 10 also has two types of openings 15 and 16 formed at radial positions separated by 90 degrees from the center of the heat transfer plate 10, and one opening 16 has the other opening 15. Toe 1 to be inserted into
7 are formed. Then, as in the previous example, the heat transfer plate 10
Are rotated by 90 degrees, the protruding edge 17 is inserted into the opening 15 and overlapped, and a predetermined number of the stacked layers are laminated to form a plate heat exchanger. Thus, the object of the present invention is achieved by rotating the plane shape of the heat transfer plate 10 by 90 degrees to form an overlapping shape, and is not limited to a circle or a square. Note that the same reference numerals in the drawings have the same configuration as in the previous example, and thus description thereof will be omitted.

[0012]

As described above, according to the present invention, the plane shape is 9
It is manufactured by laminating a predetermined number of plates using a single type of plate that is rotated 0 degrees and formed in an overlapping shape. This reduces the number of parts and mold costs compared to conventional products, and significantly reduces manufacturing costs. can do. In addition, the fluid circulates diagonally in each layer partitioned by the heat transfer plate 10 and the heat transfer plate 1
The fluid flowing through the upper and lower layers through the zero crosses the flow, and efficient heat exchange is performed.

Further, according to the manufacturing means of the present invention, the brazing material 19 inserted into the opening groove formed between the upper and lower outer edges 11b of the stacked heat transfer plates 10 can be visually confirmed and thus is left behind. Without melting, it is melted and firmly welded to the side edge portion 11a, so that the workability of welding and the jointability can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a heat transfer plate according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is an exploded perspective view showing an assembling method.

FIG. 4 is a sectional view of an assembled state.

FIG. 5 is a sectional view of a main part showing a welding method.

FIG. 6 is a plan view of a heat transfer plate according to another embodiment.

[Explanation of symbols]

 Reference Signs List 10 heat transfer plate 11a side edge 11b outer edge 12 uneven surface 15 opening 16 opening 17 projection edge 19 brazing material

Claims (2)

[Claims] 1. A heat transfer plate (10) having a continuous uneven surface (12) formed by rotating or rotating by 90 degrees to form a planar shape in an overlapping polygonal shape, and forming a 90 ° from the center of the heat transfer plate (10). Openings (15) and (16) are formed at radial positions separated by an interval of degrees, and a protruding edge (17) is formed on one of the openings (16).
A plate heat exchanger formed by stacking a predetermined number of heat transfer plates (10) by rotating the heat transfer plates (90) by 90 degrees, inserting the protruding edges (17) into the openings (15), and laminating the heat transfer plates (10). 2. A heat transfer plate (10) is formed by pressing a copper plate, and an outer edge portion (11b) having a small inclination angle is formed on an upper edge of a side edge portion (11a) raised on a peripheral edge, and laminated. 3. The plate heat exchanger according to claim 1, wherein a brazing material is inserted into an opening groove formed between upper and lower outer edges of the heat transfer plate and brazed. vessel.