JP2548607Y2 - Plate heat exchanger - Google Patents

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.

[0002]

2. Description of the Related Art In a plate heat exchanger, a plurality of heat transfer plates are generally arranged in a vessel, and heat is exchanged by flowing a fluid between the heat transfer plates. In order to improve the strength of the heat transfer plate after forming the fluid flow path and assembling,
A press-formed plate having an uneven surface shape is used.

FIG . 4 shows an example of the surface shape of a plate. The pair of plates 1 and 2 in the same example have concave portions and convex portions formed alternately by planes extending in an oblique direction, and the surface shapes of the plates 1 and 2 are line-symmetric with each other.

[0004] The fluid circuit structure of the plate-type heat exchanger is such that a plurality of plate pairs in which a plate 1 and a plate 2 are combined are arranged in a container 3 and adjacent plate pairs are brought into contact with each other. As shown in FIG . Both outer plates are in contact with the sides of the container. In FIG. 5 , a row of fluid circuits 4 communicating in the vertical direction is formed, and no liquid junction occurs in the adjacent fluid circuits 4.

[0005] Such a structure makes it possible to simultaneously exchange heat of different types of fluids. FIG. 6 shows an example in which the fluid circuit structure is applied to a solution heat exchanger of an absorption refrigerator. In FIG. 6, the horizontal direction is the flow path of the high-temperature liquid, and the vertical direction is the flow path of the low-temperature liquid. As shown in FIG. 5 , the fluid circuit 4 has a high-temperature liquid circuit and a low-temperature liquid circuit arranged in every other vertical line. It flows out from the outlet 6.
Similarly, the low-temperature liquid flowing from the low-temperature liquid inlet 7 passes through the low-temperature liquid circuit, undergoes heat exchange, and flows out of the low-temperature liquid outlet 8.

[0006]

In the above-mentioned plate contact structure, the contact point between adjacent plates (part 1)
5 are indicated by x in FIG. 5), which are the intersections of the intersecting convex ridges, that is, the plates are in point contact. On the other hand, at the contact points between the outer plates and the side surfaces of the container 3 (one of which is indicated by y in FIG. 5), the entire convex ridge line comes into contact with the side surface of the container 3, that is, a line contact is made.

The fluid circuit 4 'formed by the plate and the side surface of the container 3 has a volume half that of the fluid circuit 4 formed between the adjacent plates. The efficiency of the flow decreases.

As described above, the fluid circuit 4 'has a structure in which contaminants easily accumulate on the plate, the side surface and the tangent of the container 3, whereby the plate may be corroded and a liquid junction of a different fluid may occur. there were.

The present invention has been made in view of the above-mentioned problems, and has an improved contact structure between a plate and a side surface of a container.
The purpose of the present invention is to prevent the accumulation of contaminants, the corrosion damage of the plate, and the liquid junction of the fluid.

[0010]

According to the present invention, a plurality of heat transfer plates having irregularities are arranged in a container, and the protrusions of each heat transfer plate are respectively arranged on the protrusions of other adjacent heat transfer plates. In a plate heat exchanger in which a fluid circuit is formed by contacting and fixing, a point contact is made between the side surface of the container and a heat transfer plate adjacent to the side surface with the heat transfer plate, and the heat transfer is performed. Plate and said container
It is characterized in that a plate-like member forming a space serving as a fluid flow path is interposed between the side surface and the side surface .

The plate-like member is a dummy plate having the same shape as the heat transfer plate, and the dummy plate may be arranged in contact with the adjacent heat transfer plate in the same manner as the heat transfer plates. Mesh material , mesh material mesh structure wall
Even if the end face of the material is placed in point contact with the projection of the heat transfer plate,
Good .

[0012]

According to the above configuration, the plate and the side surface of the container do not come into line contact with each other, and the accumulation of contaminants is suppressed.

In the configuration of the first embodiment, the flow path formed by the dummy plate and the side surface of the container is not used as a fluid circuit for heat exchange, and the same fluid as the fluid flowing to the adjacent fluid circuit flows. Then, even if the plate is corroded or damaged, a different fluid does not liquid-junction.

In the configuration of the second embodiment, the contact between the plate and the mesh material is a point contact as shown in FIG.
Contaminant deposits are reduced.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. The same members as those described above are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 shows a fluid circuit 4 and a plate contact structure according to a first embodiment of the present invention. A dummy plate 9 is interposed between the plate and the side of the container 3. Dummy plate 9
Is identical to the plate 1 or the plate 2 and is paired with an adjacent plate. That is, the contact of the dummy plate 9 is structurally the same as in the related art.
The space formed between the dummy plate 9 and the side of the container 3 is not a heat exchange circuit, and the same solution flows in the adjacent solution circuit 4.

According to this embodiment, even if contaminants are deposited on the dummy plate 9 and the plate 9 is corroded and damaged, the same solution flows in the adjacent solution circuit 4, so that different solutions cannot be mixed. And there is no hindrance to the heat exchange cycle.

FIG. 2 shows a fluid circuit 4 and a plate contact structure according to a second embodiment of the present invention. A mesh member 10 is interposed between the plate and the side of the container 3. The mesh material 10 has a surface shape different from the unevenness of the plate. For example, when the mesh material 10 is combined with the plate 2, the plate 2 and the mesh material 10 come into point contact as shown in FIG. Therefore, the number of places where contaminants are deposited can be reduced, and the deposition of contaminants, corrosion damage of the plate, and liquid junction of different solutions can be suppressed.

The material of the mesh member 10 may be the same as that of the plate. However, it is more effective to use a material having excellent corrosion resistance and electrical insulation such as Teflon.

[0020]

As described above, according to the present invention, the accumulation of contaminants between the plate and the container is suppressed, thereby preventing corrosion damage of the plate and, consequently, liquid junction of the fluid, thereby improving durability. And the like. The present invention is particularly effective in a plate support structure that cannot be disassembled and cleaned, such as plate welding.

[Brief description of the drawings]

FIG. 1 is a sectional view illustrating a fluid circuit and a heat transfer plate contact structure according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view illustrating a fluid circuit and a heat transfer plate contact structure according to a second embodiment of the present invention;

FIG. 3 is an explanatory diagram showing a combination of a plate and a mesh plate material according to a second embodiment.

FIG. 4 is a plan view showing a plate surface shape of a heat transfer plate.

FIG. 5 is a cross-sectional view illustrating a fluid circuit and a heat transfer plate contact structure according to an example of the related art.

FIG. 6 is a perspective view showing an example in which the fluid circuit is applied to a solution heat exchanger of an absorption refrigerator.

[Explanation of symbols]

 Reference Signs List 1 plate 2 plate 3 container 4, 4 'fluid circuit 5 high-temperature liquid inlet 6 high-temperature liquid outlet 7 low-temperature liquid inlet 8 low-temperature liquid outlet 9 dummy plate 10 mesh material

Claims (3)

(57) [Scope of request for utility model registration] A fluid is formed by arranging a plurality of heat transfer plates having irregularities in a container and contacting and fixing the protrusions of each heat transfer plate with the protrusions of another adjacent heat transfer plate. in plate heat exchanger obtained by forming a circuit, between a side surface of the container, and the heat transfer plate adjacent to the side surface, the heat transfer
Point contact with the hot plate, and flow between the heat transfer plate and the side of the vessel
A plate heat exchanger comprising a plate-like member forming a space serving as a body flow path interposed therebetween. 2. The method according to claim 1, wherein the plate-like member is a dummy plate having the same shape as the heat transfer plate, and the dummy plate is arranged in contact with the adjacent heat transfer plate in the same manner as the heat transfer plates. The plate heat exchanger according to claim 1. Wherein said plate-like member is a mesh material,該Me
The end face of the mesh material of the mesh material
2. The method according to claim 1, wherein the first and second portions are arranged in point contact with each other.
The plate heat exchanger as described .