JPH0552559U - Plate heat exchanger - Google Patents

Abstract

(57) [Abstract] [Purpose] In a plate heat exchanger, the contact structure between the heat transfer plate and the side surface of the container was improved, resulting in the accumulation of contaminants, the corrosion damage of the plate, and the liquid junction of the fluid. Prevent. [Configuration] A dummy plate 9 is interposed between the plate and the side surface of the container 3. The dummy plate 9 has the same shape as the plate 1 or the plate 2 and a pair of adjacent plates, and the same solution as that of the adjacent solution circuit 4 is placed in the space formed between the dummy plate 9 and the side surface of the container 3. To flow.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a plate heat exchanger.

[0002]

[Prior Art]

 A plate-type heat exchanger is generally configured to arrange a plurality of heat transfer plates in a container and to perform heat exchange by causing a fluid to flow between the heat transfer plates. As the heat transfer plate, a plate having an uneven surface shape that is press-molded is used in order to form a flow path of a fluid and improve strength after assembly.

FIG. 5 shows an example of the surface shape of the plate. The pair of plate 1 and plate 2 in the same example are formed by alternately forming concave portions and convex portions by planes extending in an oblique direction, and the surface shapes of the plate 1 and plate 2 are line-symmetrical to each other. ..

The fluid circuit structure of the plate heat exchanger is formed by arranging a plurality of plate pairs, which are a combination of the plate 1 and the plate 2, in the container 3 and contacting adjacent plate pairs with each other. The shape is shown in FIG. The outer plates contact the sides of the container. In FIG. 4, a row of fluid circuits 4 that communicate in the vertical direction is formed, and there is no liquid junction in adjacent fluid circuits 4.

With such a structure, it becomes possible to simultaneously heat-exchange different kinds 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 for the high temperature liquid, and the vertical direction is the flow path for the low temperature liquid. As shown in FIG. 4, the fluid circuit 4 is divided into a high temperature liquid circuit and a low temperature liquid circuit in every other column, and the high temperature liquid flowing in from the high temperature liquid inlet 5 passes through the high temperature liquid circuit to exchange heat, It flows out from the liquid outlet 6. Similarly, the low-temperature liquid that has flowed in from the low-temperature liquid inlet 7 passes through the low-temperature liquid circuit, undergoes heat exchange, and flows out from the low-temperature liquid outlet 8.

[0006]

[Problems to be solved by the device]

 In the plate contact structure described above, the contact point between adjacent plates (one of which is indicated by x in FIG. 5) is the intersection of the convex ridge lines that intersect with each other, that is, the point contact between the plates. 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 lines contact the side surfaces of the container 3, that is, line contact.

The volume of the fluid circuit 4 ′ formed by the plate and the side surface of the container 3 is half that of the fluid circuit 4 formed between the adjacent plates. The fluid flow efficiency is reduced.

As described above, the fluid circuit 4 ′ has a structure in which contaminants are likely to be deposited on the side surface and the tangent line of the plate and the container 3, which may corrode the plate and cause a liquid junction of different fluids. there were.

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

[0010]

[Means for Solving the Problems]

 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 brought into contact with and fixed to the protrusions of other adjacent heat transfer plates to fix the solution. A plate-type heat exchanger having a passage is characterized in that a plate-shaped member is interposed between a side surface of the container and a heat transfer plate adjacent to the side surface.

The plate-shaped member is a dummy plate having the same shape as the heat transfer plate, and the dummy plate may be arranged in contact with an adjacent heat transfer plate in the same manner as the heat transfer plates are arranged, or the plate-shaped member may be provided. It may be a mesh material.

[0012]

[Action]

 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 the fluid circuit for heat exchange, but the same fluid as the fluid flowing in the adjacent fluid circuit is flowed. If so, even if the plate is corroded or damaged, different fluids will not be liquid-junctioned.

In the structure of the second embodiment, the contact between the plate and the mesh material is point contact as shown in FIG. 3, and the number of pollutant deposits is reduced.

[0015]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. The same members as those described above are designated by the same reference numerals and the 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, in which a dummy plate 9 is interposed between the plate and the side surface of the container 3. The dummy plate 9 is the same as the plate 1 or the plate 2 and has a pair of shapes with an adjacent plate. That is, the contact of the dummy plate 9 is structurally the same as the conventional one. The space formed between the dummy plate 9 and the side surface of the container 3 does not serve as a heat exchange circuit, and the same solution as in the adjacent solution circuit 4 flows.

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 as the adjacent solution circuit 4 is flowing, so that different solutions may mix. In addition, the heat exchange cycle is not hindered.

FIG. 2 shows a fluid circuit 4 and a plate contact structure according to a second embodiment of the present invention, in which a mesh material 10 is interposed between the plate and the side surface 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 are in point contact with each other as shown in FIG. Therefore, the number of pollutant deposits can be reduced, and the pollutant deposits, the corrosive damage of the plate, and the liquid junction of different solutions can be suppressed.

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

[0020]

[Effect of the device]

 As described above, according to the present invention, the accumulation of contaminants between the plate and the container can be suppressed, which can prevent corrosion damage of the plate and eventually prevent liquid junction and improve the durability. Played. INDUSTRIAL APPLICABILITY The present invention is particularly effective in a plate supporting structure such as plate welding which cannot be disassembled and cleaned.

[Brief description of drawings]

FIG. 1 is a sectional view showing 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 showing 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 the 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 showing a fluid circuit and a heat transfer plate contact structure according to an example of a conventional technique.

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

[Explanation of symbols]

 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)

[Scope of utility model registration request] 1. A fluid by arranging a plurality of heat transfer plates having irregularities in a container, and fixing the protrusions of each heat transfer plate by contacting and fixing the protrusions of other adjacent heat transfer plates. A plate type heat exchanger having a circuit, wherein a plate-shaped member is interposed between a side surface of the container and the heat transfer plate adjacent to the side surface. . 2. The plate-shaped 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 plates in the same manner as the heat transfer plates. The plate heat exchanger according to claim 1. 3. The plate heat exchanger according to claim 1, wherein the plate member is a mesh material.