JPH05264192A - Plate type heat exchanger - Google Patents

Abstract

PURPOSE:To permit the constitution of a heat exchanger suitable for various using conditions easily by a method wherein a plurality of heat transfer elements, made by integrating two sheets of flat plates, provided with plate holes at four corners thereof, while interposing gaskets between the plates, are laminated through a gasket. CONSTITUTION:A plate type heat exchanger 30 is made by a method wherein heat transfer elements 37, prepared by integrating plates 31 having the same configuration through metallic gaskets 36 to form a first flow passage A therein, are laminated through gaskets 35 to form a second flow passage B between respective heat transfer elements 37 while the first flow passage A and the second flow passage B are formed alternately. Respective plates 31 are constituted of a rectangular flat plate having wavy heat transfer surfaces 32 on the surfaces thereof and first to fourth plate holes 33a-33d are provided at four corners while the plate is provided with a gasket groove 34. According to this method, the change of a gap between the first flow passages A can be effected by changing the metallic gaskets 36 whereby a heat exchanger, suitable for various using conditions is constituted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-type heat exchanger, and more specifically, it integrates two laminated plates and laminates a pair of heat transfer units to form a first heat transfer unit.
The present invention relates to a plate heat exchanger in which flow passages and second flow passages are alternately formed.

[0002]

Plates used in plate heat exchangers
As shown in FIG. 8, generally, (1) is composed of a rectangular flat plate and has a corrugated heat transfer surface (2) on its surface.
First to fourth plate holes (3a) (3b) (3c) (3d) at the four corners
Is provided.

Further, each plate hole (3a) on the plate (1)
A gasket groove (4) for mounting the gasket (5) is provided in the surrounding portions of (3b), (3c) and (3d) and the periphery of the heat transfer surface (2). ) To the four plate holes (3a) (3b) (3c) (3d)
Any plate hole, in this example, the first and third plate holes (3a) (3c) and the heat transfer surface (2) communicate with each other.

When forming the plate heat exchanger by laminating the plates (1), for example, as shown in FIG. 9, the first and third plate holes (3a) (3c) and the heat transfer surface ( The first plate (1a) communicating with 2) and the second plate (1b) communicating with the second and fourth plate holes (3b) (3d) and the heat transfer surface (2) are alternated. Laminated to the first and third plate holes (3a)
A plate heat exchanger in which first flow paths (A) communicating with (3c) and second flow paths (B) communicating with the second and fourth plate holes (3b) and (3d) are alternately formed. Form (10).

Then, by supplying two kinds of fluids to the first and second flow paths (A) and (B) of the plate heat exchanger (10), heat is exchanged between the two kinds of fluids. I have to.

[0006] Among the plate heat exchangers, the first
A gasket (5) is used to secure the liquid tightness of the flow path (A) and the second flow path (B).
Instead of using only one, two plates (1) (1) are welded and fixed at the part where the gasket (5) was conventionally interposed,
Gasket the heat transfer element (16) which is a set of two pieces.
There is also one in which the flow paths in which the liquid tightness is secured by welding the plates to each other and the flow paths in which the liquid tightness is secured by the gasket (5) are alternately arranged by stacking via (5).

That is, as shown in FIGS. 5 to 7, the gasket grooves (14) (1) formed in the two plates (11) (11) respectively.
2) Make the outer surfaces (14a) (14a) of the groove bottom of 4) contact each other.
The plate (11) (11) is laminated, and a part of this overlapped portion necessary to form the first flow path (A) between the plates (11) and (11) (indicated by a dotted line in FIG. 5). By welding (shown)
A heat transfer element (16) having a first flow path (A) is formed between the plates (11) and (11).

Then, the heat transfer elements (16) are laminated via the gasket (15), and the second flow path (B) is formed between the heat transfer elements (16) to form the first flow path. (A) and second
A plate-type heat exchanger (20) in which the flow paths (B) are alternately formed is configured.

In the figure, (12) is a heat transfer surface, and (13a) (13b) (13c).
(13d) are first to fourth plate holes.

Further, as a plate type heat exchanger of the type in which a flow path is formed by the above-mentioned welding, Japanese Patent Publication No. 1-2647
There is a plate heat exchanger disclosed in the No. 9 public information.

[0011]

As described above, only the gasket (15) is used to secure the liquid tightness between the first flow path (A) and the second flow path (B) of the plate heat exchanger (20). 2 instead of using
If the method of directly welding the plates (11) (11) is used, when a high-temperature, high-pressure fluid is made to flow or a highly corrosive liquid is made to flow to the gasket, this kind of liquid is
By flowing in the first flow path (A) formed by welding, the life of the plate heat exchanger (20) can be extended.

However, when the plate heat exchanger (20) is formed by the above method, the gap of the first flow path (A) formed by the heat transfer element (16) is set to the plate heat exchanger (2).
When changing according to the usage conditions of (0), gasket groove (14)
The only way to change the groove depth of the plate heat exchanger (20) is to prepare a very large number of plates (11) in order to adapt this type of plate heat exchanger (20) to various usage conditions. ,
It was uneconomical.

Further, when the groove depth of the gasket groove (14) is changed, the heat transfer elements (16) are laminated, so that the gasket (15) fitted in the gasket groove (14) is also attached to each plate.
(11) It was necessary to prepare for each.

Furthermore, all the plates for welding are
It cannot be applied to conventional plates that use gaskets, new dedicated plates are required, and mold investment is required.

[0015]

[Means for Solving the Problems] A plate heat exchanger,
From two plates that have a heat transfer surface in the center, plate holes at the four corners, and gasket grooves around the heat transfer surface and plate holes, and a metal gasket that fits in the gasket groove between both plates. And a heat transfer element in which the gasket groove and the metal gasket are joined by welding or brazing,

When the heat transfer elements are stacked, a gasket is provided between the heat transfer elements to form a first flow path in each heat transfer element, and a second flow path is provided between the heat transfer elements. Is formed.

[0017]

As described above, by forming the first flow path by using the metal gasket in the heat transfer element, the first flow path is formed.
The flow path gap of the flow path is performed by changing only the metal gasket.

[0018]

1 to 4 show the essential parts of a plate heat exchanger (30) according to the present invention.

The plate heat exchanger (30) shown in this figure is
Attach the plate (31) with the same shape to the metal spacer (3
The heat transfer element (37), which is integrated via 6) and has the first flow path (A) formed therein, is laminated via the gasket (35),
Form the second flow path (B) between each heat transfer element (37) (37),
The first flow path (A) and the second flow path (B) are alternately formed.

The plate (31) forming the heat transfer element (37) according to the present invention is composed of a rectangular flat plate as in the conventional case, and has a corrugated heat transfer surface (32) on its surface. Then
First to fourth plate holes (33a) (33b) (33c) at the four corners
(33d) is provided, and gasket grooves are provided in the area surrounding the plate holes (33a) (33b) (33c) (33d) and the heat transfer surface (32) on the plate (31). (34) is provided.

Further, as shown in FIG. 1, the metal gasket (36) interposed in the gasket groove (34) has substantially the same shape as the conventional gasket. The third plate holes (33a) (33c) and the heat transfer surface (3
2) a first seal part (36a) integrally surrounding the second plate hole (33b) and a second seal part (36b) surrounding the periphery of the second plate hole (33b),
Third seal part surrounding the fourth plate hole (33d)
(36c) and.

In order to form the heat transfer element (37) in the above structure, as shown in FIGS. 1 and 3, the plate (31) is formed.
A metal gasket (36) is placed in the gasket groove (34) formed in the first groove, and the metal gasket (36) allows the first and third gaskets to be formed.
The plate holes (33a) (33c) and the heat transfer surface (32) are integrally surrounded, and the peripheries of the second and fourth plate holes (33b) (33d) are also surrounded.

Next, a plate (31) having the same shape as the plate (31) is rotated on the plate (31) on which the metal gasket (36) is arranged by 180 degrees on a plane. Stack.

Then, the inner and inner surfaces (34a) of the groove bottoms of the gasket grooves (34) and (34) of both plates (31) and (31) are in contact with the upper and lower surfaces of the metal gasket (36) and the upper and lower surfaces thereof. Outer surface of groove bottom (34
The first flow path (A) in which the first and third plate holes (33a) (33c) and the heat transfer surface (32) communicate with each other by integrating with b) by welding or brazing. A heat transfer element (37) having

When the heat transfer element (37) is formed as described above, as shown in FIG. 2 and FIG.
A gasket (35) similar to the conventional one is fitted into the gasket groove (34) located in (37), and by this gasket (35), the second and fourth plate holes (33b) (33d) and the heat transfer surface are formed. (32) is integrally surrounded, and the first and third plate holes (33
a) Surround (33c).

If the heat transfer elements (37) having the gasket (35) are laminated so that the directions thereof are the same, the second and fourth plate holes are formed between the heat transfer elements (37). Second flow path in which (33b) and (33d) communicate with the heat transfer surface (32)
(B) is formed, and as a result, the first flow path (A) and the second flow path (B) are formed.
A plate heat exchanger (30) in which and are alternately formed can be formed.

As described above, the metal gasket (36) and the gasket (35) are provided to secure the liquid tightness between the first flow path (A) and the second flow path (B) of the plate heat exchanger (30). If used, when a high-temperature, high-pressure fluid or a highly corrosive liquid is flown, if this kind of liquid is flown into the first flow path (A) formed by the metal gasket (36), , Plate heat exchanger (30)
Can have a longer life.

Further, when the gap of the first flow path (A) is changed according to the use condition of the plate heat exchanger (30), it is only necessary to change the thickness of the metal gasket (36). If you prepare many kinds of metal gasket (36) only,
The plate type heat exchanger (30) corresponding to various applications can be formed while the (31) and the gasket (35) are all shared.

In the above embodiment, the metal gasket (36) interposed between the plates (31), the first seal portion (36a),
The example in which the second and third seal portions (36b) and (36c) are integrated is used, but as the metal gasket (36), each of the seal portions (36a) (36b) (36c) is used. It may be used as a separate body, and each seal part (36a) (36b)
(36c) is used separately, and each seal part
The joint between (36a), (36b) and (36c) may be filled with a metal gasket or a rubber gasket.

Similarly, the gasket (35) may have different sealing parts (35a) (35b) (35c), and the gasket material may also be different. Good.

[0031]

As described above, in the plate heat exchanger according to the present invention, the metal gasket is used as the gasket for forming the first flow path of the plate heat exchanger. When a high-temperature, high-pressure fluid is made to flow through the vessel, or a fluid that is highly corrosive to the gasket is made to flow, this kind of liquid is made to flow in the first flow path formed by the metal gasket, so that a plate heat exchanger Can have a longer life.

Further, when changing the flow path plate gap of the first flow path, it is only necessary to change the metal gasket. Therefore, it is very economical when this kind of plate heat exchanger is adapted to various usage conditions. ..

Further, in the plate heat exchanger according to the present invention, if only the metal gasket is manufactured, the conventional plate can be used as it is. Therefore, the plate according to the present invention can be used with almost no new capital investment. Type heat exchanger can be manufactured.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a heat transfer element of a plate heat exchanger according to the present invention.

FIG. 2 is an exploded perspective view of a plate heat exchanger according to the present invention.

FIG. 3 is a sectional view of a heat transfer element.

FIG. 4 is a sectional view of a plate heat exchanger according to the present invention.

FIG. 5 is an exploded perspective view of a conventional plate heat exchanger.

FIG. 6 is a sectional view of a conventional heat transfer element.

FIG. 7 is a sectional view of a conventional plate heat exchanger.

FIG. 8 is a perspective view of a plate.

FIG. 9 is a perspective view showing an example of knitting a plate.

[Explanation of symbols]

 A 1st flow path B 2nd flow path 30 Plate type heat exchanger 31 Plate 32 Heat transfer surface 33a 1st plate hole 33b 2nd plate hole 33c 3rd plate hole 33d 4th plate hole 34 Gasket groove 35 Gasket 36 Metal gasket 37 Heat transfer element

Claims (1)

[Claims] 1. Two plates having a heat transfer surface in the center, plate holes at four corners, and gasket grooves around the heat transfer surface and the plate hole, and in a gasket groove between the plates. The heat transfer element is made of a metal gasket to be fitted, and the gasket groove and the metal gasket are joined by welding or brazing, and a gasket interposed between the heat transfer elements when the heat transfer elements are laminated, A plate heat exchanger characterized in that a first flow path is formed in each of the heat transfer elements, and a second flow path is formed between the heat transfer elements.