JPH09210580A - Plate fin heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel plate fin heat exchanger preventing deformation of an isolating plate due to strain and thereby enabling improvement of precision. SOLUTION: A high-temperature fluid passage 4 for making a high- temperature fluid flow and a low-temperature fluid passage 5 for making a low-temperature fluid flow are stacked alternately in a plurality with a flat- plate-shaped isolating plate 2 interposed for dividing these passages, while fin members are provided in the passages and the edge parts of the isolating plates 2 adjacent to each other are sealed with a seal member 11 having a U-shaped section and extending along the edge parts of the isolating plates 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate fin heat exchanger used in nuclear power generation facilities, chemical plants and the like.

[0002]

2. Description of the Related Art As one of heat exchangers generally used in nuclear power generation facilities, chemical plants and the like, there is a plate fin heat exchanger using a thin plate separator as shown in FIG. As shown in the figure, this plate fin heat exchanger 1 has a fin member 3 formed by corrugating a thin press separator 2 having two openings 1a, 1a as shown in FIG.
A plurality of high temperature fluid flow paths 4 for flowing a high temperature fluid and a low temperature fluid flow path 5 for flowing a low temperature fluid are alternately formed with these separators 2 as a boundary.

Then, as shown by the black arrow in the figure, a high temperature fluid is caused to flow from the side surface to each high temperature fluid flow path 4 side, and as shown by the white arrow in the figure, it is formed by the opening 1a of each separator 2. From the side of the inlet header 6a that is formed,
An outlet header 6b formed by the other opening 1a of each separator 2 by causing a low temperature fluid to flow to the side of the low temperature fluid flow path 5 adjacent to
The heat is exchanged between the high-temperature fluid and the low-temperature fluid via the separator 2 by discharging the high-temperature fluid and the low-temperature fluid. The fin member 3 in this plate fin heat exchanger has the function of improving the structural strength and relaxing the generation of thermal stress due to heating characteristics.

Further, in the case of the conventional plate fin heat exchanger having such a configuration, each flow is prevented so that the high temperature fluid does not flow into the low temperature fluid flow path 5 side and the low temperature fluid does not flow into the high temperature fluid flow path 4 side. The periphery of the road is sealed.
That is, the peripheral portion of the separator 2 as shown in FIG.
The pair of dies 10a and 10b having the shape shown in FIG.
As shown in FIG. 2, after stacking so as to face each other in opposite directions via the fin members 3, by brazing or welding the facing edges R to each other, on the header 6a, 6b side where the low temperature fluid flows, , The low temperature fluid flow path 5 is opened, the high temperature fluid flow path 4 is sealed, and the low temperature fluid flow path 5 is oppositely sealed on the high temperature fluid inflow / outflow side located outside the heat exchanger 1. And the high temperature fluid flow path 4
Is open.

[0005]

By the way, in the method of sealing the peripheral edge of the separator 2 and the edge of the opening 1a in an embossed shape by means of sheet metal pressing and sealing as described above, strain due to stress during pressing is applied. Therefore, the separator 2 is deformed. In particular, the problem of this deformation is that the opening 1 where the two-step embossing as described above is performed.
The deformation occurred more frequently around a, and the deformation was more remarkable as the thickness of the separator 2 became thinner or the area thereof increased. Therefore, particularly in the periphery of the opening 1a where two-step embossing is performed, first, the opening 1a side is pressed by one step, then this is once removed from the mold, and the strain generated around this opening 1a is heat treated. It is necessary to perform the pressing process in two steps, such as removing it by using a different mold and then pressing the surrounding area with another mold, which significantly increases the manufacturing time and manufacturing cost. There is a problem that it will end up.

Therefore, the present invention has been devised in order to effectively solve these problems, and its purpose is to prevent deformation due to strain occurring in the separator in advance and improve accuracy. It is to provide a new plate fin heat exchanger capable of achieving the above.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a plurality of high-temperature fluid channels and low-temperature fluid channels are alternately laminated via a separator plate to partition each of these channels. At the same time, a fin member is provided in each flow path, and the edge portions of adjacent separators are sealed with a seal member having a U-shaped cross section extending along the edge portions.

As a result, it is not necessary to emboss the edge of the separator with a sheet metal press or the like as in the prior art, and a separator having a flat plate shape as a whole can be used.
Deformation and distortion of the separator are eliminated, and assembly accuracy and reliability are improved.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of a plate fin heat exchanger according to the present invention, FIG. 2 is a sectional view taken along line XX in FIG. 1, and FIG. 3 is an exploded sectional view of FIG. The basic configuration is substantially the same as that of the conventional plate fin heat exchanger described above. That is, as shown in the figure, in the plate fin heat exchanger 1, a high temperature fluid flow path 4 in which a high temperature fluid flows and a low temperature fluid flow path 5 in which a low temperature fluid flows are alternately arranged in a vertical direction via a flat separator plate 2. A plurality of layers are stacked, and inside the high temperature fluid flow path 4 and the low temperature fluid flow path 5 between these separators 2, a corrugated shape is formed in order to enhance heating characteristics and structural strength and to regulate the flow of fluid. Fin member 3 processed into
Is provided. Further, an inlet header 6a and an outlet header 6b are formed at the ends of the laminated body A, respectively, so as to pass therethrough in the vertical direction in order to flow the low temperature fluid.

In particular, in the present invention, as shown in FIGS. 2 to 3, the partition between the high temperature fluid flow path 4 and the low temperature fluid flow path 5 in the vertical direction is performed by the flat plate-like separator plate 2. It is characterized in that the adjacent edges of the openings 1a, 1a forming the inlet header 6a and the outlet header 6b of the separator 2 are sealed with a ring-shaped seal member 11. As shown in FIG. 1, the seal member 11 is formed in a ring shape as shown in FIG. 4 because the edge of the high temperature fluid flow path 4 has a circular shape. As shown in FIG. 3 to FIG. 3, it has a U-shaped cross section. On the other hand, the peripheral portion of the low temperature fluid channel 5 is embossed by press molding as in the conventional case, and the bent portions are sealed by brazing or welding as in the conventional case. The separator 2, the high temperature fluid side plate fins 3a and the low temperature fluid side plate fins 3b which are the fin members 3 are formed of a metal having a high thermal conductivity.

In the plate fin heat exchanger 1 thus constructed, first, as shown in FIG. 2, the low temperature fluid flows into the inlet header 6a through the pipe 12 connected to the inlet header 6a, Low temperature fluid inlet 5 of low temperature fluid channel 5
After passing through the low temperature fluid flow path 5 while contacting the low temperature fluid side plate fin 3b, the other outlet header 6b
Spill out of. At the same time, as shown in FIG. 1, the high-temperature fluid flows in through the high-temperature fluid inlet 4a on the side surface of the plate fin heat exchanger and flows in the high-temperature fluid passage 4 in a certain direction while contacting the high-temperature fluid side plate fin 3a. And flows out from the other high temperature fluid outlet 4b. At this time, the heat of the high temperature fluid is transferred to the high temperature fluid side plate fins 3a provided in the high temperature fluid flow path 4, and is transferred to the low temperature fluid via the separator 2 and the low temperature fluid side plate fins 3b. Further, according to the above-mentioned structure, the separator 2 is embossed by a sheet metal press only on its peripheral edge as usual, and the opening 1a is not pressed at all, so that the periphery of the opening 1a is warped. Does not occur. Therefore, the separator 2 can be brazed or welded easily without any gaps, and the smooth separator 2 can be formed by manufacturing one mold. In addition, by sealing the seal member 11 to the edge of the opening of the separator 2, it is possible to perform interlayer sealing between the high temperature fluid channel 4 and the low temperature fluid channel 5, and the high temperature fluid and the low temperature fluid are mixed. Without, it is possible to obtain the same effect as the conventional plate fin heat exchanger.

In the embodiment of the present invention, the header 6
Although the periphery of a and 6b, that is, the edges of the openings 1a of the adjacent separators 2 are sealed by the ring-shaped seal member 11 having a U-shaped cross section, the peripheral edge of the separator 2 is also sealed. You may make it seal using a similar sealing member.

[0014]

In summary, according to the present invention, the edges of adjacent separators are sealed with a seal member having a U-shaped cross section to partition the edges of the high temperature fluid passage and the low temperature fluid passage. Therefore, it is not necessary to emboss the edge of the separator as in the conventional case. Therefore, the separator does not warp or distort, and good brazing or welding work can be performed, and a high quality plate fin heat exchanger can be obtained. At the same time, since it is not necessary to manufacture two molds, the excellent effect that the manufacturing cost can be reduced can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a plate fin heat exchanger according to the present invention.

FIG. 2 is a sectional view taken along line XX in FIG.

FIG. 3 is an exploded sectional view of FIG.

FIG. 4 is a perspective view of a seal member.

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

FIG. 6 is a plan view of the separator.

FIG. 7 is an exploded cross-sectional view of the main parts of FIG.

FIG. 8 is a cross-sectional view of a mold for pressing a conventional separator.

[Explanation of symbols]

 2 Separation Plate 3 Fin Member 4 High Temperature Fluid Channel 5 Low Temperature Fluid Channel 10 Edge 11 Seal Member

Claims (1)

[Claims] 1. A plurality of high-temperature fluid flow paths and low-temperature fluid flow paths are alternately laminated via partition plates to partition each of the flow paths, and fin members are provided in each of the flow paths. ,
A plate fin heat exchanger, characterized in that the edge portions of the adjacent separators are sealed with a seal member having a U-shaped cross section extending along the edge portions.