JPH01111193A - Plate fin type heat exchanger - Google Patents

Abstract

PURPOSE:To reduce the size of a vessel and thin the thickness of a sheet for the vessel to miniaturize and reduce the weight of the vessel, by a method wherein the side plates of the vessel is made to contact a heat exchanging part closely, a reinforcing flow passage is interposed between both of the side plates, on which the heat exchanging part is not exsisting, and both ends of the vessel, which serve as the headers of one of heat exchanging fluids, are constituted of half-split cylindrical bodies. CONSTITUTION:A vessel 26 is formed of a cylindrical body 20, consisting of a pair of opposing side plates 27, 27 and a pair of opposing end plates 28, 28, and the inlet side header 30 and the outlet side header 31 for low-temperature fluid, which are constituted of half-split cylindrical bodies and closing both opening ends of the cylindrical body 29. Respective side plates 27, 27 are made to contact with plates 21, 21 at both end faces of the laminating direction of a heat exchanging section 25 closely and the heat exchanging section 25 is pinched by the side plates 27, 27. A reinforcing flow passage 32, in which plates 21 and flat fins 22 are laminated with the same interval as the heat exchanging section 25 alternately, is interposed between both side plates 27, 27 from the inlet end of the low temperature fluid in the heat exchanging section 25 to the end of the cylindrical body 29 of the vessel 26 while the reinforcing flow passage 83 is interposed between both side plates 27, 27 from the outlet end of the low-temperature fluid to the end of the cylindrical body 29 of the vessel 26 in the same manner.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an improvement in a plate-fin type heat exchanger, and aims to reduce the size and weight of the heat exchanger.

[Conventional technology]

Conventionally, a so-called two-header type plate-fin heat exchanger has plates and fins stacked alternately, as shown in FIGS. A thick hexagonal plate-shaped heat exchange section 3 is provided in which low-temperature fluid channels 2 are alternately formed. The heat exchange section 3 is housed in a cylindrical container 4, and is fixed to the container 4 by a support plate 5.

Furthermore, a high temperature fluid inlet header 6 and a high temperature fluid outlet header 7 are connected to both ends of the high temperature fluid flow path 1 in the heat exchange section 3 in communication. These high-temperature fluid inlet header 6 and high-temperature fluid outlet header 7 are connected to the container 4, respectively.
It is derived from the inside to the outside. On the other hand, the header for the low temperature fluid is performed by the container 4, and there is a partition plate 8 provided at the center of the container 4 so as to divide it into two parts in the axial direction. The side thereof is a low temperature fluid outlet side header 4b. In addition, Fig. 5 (a
), 9 is a low temperature fluid inlet side nozzle connected to the low vortex fluid inlet side header 4a, and 10 is a low temperature fluid outlet side nozzle connected to the low temperature fluid outlet side header 4b.

[Problem that the invention seeks to solve]

Plate-fin heat exchangers have a large heat transfer area per unit volume, and are often used as compact heat exchangers that can be made smaller and lighter.

However, in the above conventional plate-fin heat exchanger, the container 4 is made into a cylindrical shape so as to withstand the pressure of the heat exchange fluid, so the container 4 becomes significantly larger than the heat exchange section 3. Combat 1 ~ The advantage as a heat exchanger was lost.

On the other hand, some have attempted to make the container similar to the shape of the heat exchanger, but some have simply made the container smaller. The thickness of the board had to be increased, making it extremely heavy, which was not satisfactory in terms of weight reduction.

The present invention has been made in view of the problems of the prior art, and aims to provide a small and lightweight plate-fin type heat exchanger.

[Means for solving problems]

In order to solve the above problems, the present invention forms a heat exchange section by alternately stacking plates and fins, houses this heat exchange section in a cylindrical container, and has two sides at one end and the other end of the container. In a plate-fin type heat exchanger, in which the heat exchange fluid is used as an artificial side header and an outlet side header for one heat exchange fluid, a cylinder consisting of a pair of opposing side plates and a pair of opposing side plates fixed to the end edges of the side plates. A container is formed by closing both ends of the opening of the body with the half-split cylindrical body serving as the header, and the plate surfaces of each side plate of the container are brought into close contact with both end surfaces in the stacking direction of the heat exchange section, and the heat exchange section is formed using both side plates. At the same time, each side plate of the container is provided parallel to the direction of inflow and outflow of the one heat exchange fluid, and each side plate of the container is provided so as to be continuous from the inlet side end and the outlet side end of the one heat exchange fluid in the heat exchange section. Then, a reinforcing passage section consisting of alternating layers of plates and fins is extended to both ends of the cylindrical body of the container at the same intervals as the heat exchange section, and the side plates of the container are connected to the heat exchange section and the reinforcing passage section. The feature is that a partition plate for preventing bypass flow is provided between the two.

[For production]

In a plate-fin type heat exchanger with such a configuration, the side plates, which are part of the container, are in close contact with the heat exchange part, so the strength is sufficient, and the space between the side plates that are not in close contact with the heat exchange part Since a reinforcing channel section having the same structure as the exchange section is provided, the same strength as that of a portion in close contact with the heat exchange section can be sufficiently ensured. In addition, the cut plate installed between the side plate of the container and the heat exchanger part also serves as reinforcement, and the side plate part also has sufficient strength.Furthermore, both headers at both ends of the container are made of half-split cylinders. Since it is the body, the strength in this part is also sufficient.

After all, since the container is constructed to have sufficient strength while being small, the container can be made thinner and lighter.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

FIGS. 1(a), (b), (c) to 4 show one embodiment of the plate-fin type heat exchanger of the present invention, and FIG.
Diagram (a) is cut in half and faces the high temperature fluid flow path (right side in the diagram)
and the low-temperature fluid flow path side (left side in the figure), the figure (b) is a side view, the torso (C) is a plan view, and Figure 2 is the ■-■ line in Figure 1 (b). Cross-sectional view, Figure 3 is a cross-sectional view taken along the line ■-■ in Figure 1 (C), Figure 4 is Figure 1 (b)
It is a sectional view taken along the line IV-IV in FIG.

As shown in FIGS. 1(a) and 2, this plate fin type heat exchanger 20 includes a plate 21 made of a thin plate and flat plate fins 22 which are formed by continuously bending a strip plate into a rectangular waveform.
A heat exchange section 25 is provided in which high-temperature fluid passages 23 and low-temperature fluid passages 2/I are alternately formed. This heat exchange part 25 is in the shape of a thick hexagonal plate, and the high-temperature fluid flow path 23 and the low-temperature fluid flow path 24 are connected to one end of a central flow path on a straight line, and are formed diagonally from both sides in the direction of the central axis. A continuous flow path is formed, while oblique flow paths extending from the central axis direction to both sides are formed at the other end, and are stacked in opposite directions.

On the other hand, the container 26 consists of a pair of opposing side plates 27.27 and a pair of opposing side plates 28.28 fixed to the end edges of the side plates 27.27. Cold fluid inlet and outlet headers 30 made of cylindrical bodies
and 31 are respectively closed. As shown in FIGS. 2 to 4, the side plates 27, 27 of the container 26 are closely attached to the plates 1-21. The portion 25 is sandwiched between side plates 27.27. Also, the side plate 2 of the container 26
8 and 28 are provided so that their plate surfaces are parallel to the inflow and outflow direction of the low-temperature fluid, that is, the central axis direction of the container 26, and as shown in FIG. The portions are joined to the edge portions of the side plates 27, 27 by welding.

Furthermore, as shown in FIG. 1(a), between the side plates 27 and 27 from the end of the low temperature fluid inlet side of the heat exchange section 25 to the end of the cylindrical body 29 of the container 26, A reinforcing channel section 32 is interposed in which plates 21 and flat plate fins 22 are alternately stacked at intervals. Similarly to this,
From the cold fluid outlet side end of the heat exchange section 25 to the container 26
A reinforcing channel section 33 similar to the reinforcing channel section 32 is interposed between the side plates 27 and 27 up to the end of the cylindrical body 29 . As a result, from the low-temperature fluid inlet side header 30 to the low-humidity fluid outlet side header 31, the reinforcing channel section 32. They are communicated via the low temperature fluid flow path 24 and the reinforcing flow path section 33.

Further, as shown in FIGS. 1(a) and 1(b), a low temperature fluid inlet side nozzle 34 is connected to the low temperature fluid inlet side header 30, and a low temperature fluid outlet side nozzle 34 is connected to the low temperature fluid outlet side header 31. 35 are connected.

Furthermore, as shown in FIG. 1(a) and FIG. 3, inside the cryogenic fluid inlet side and outlet side headers 30 and 31,
A rod-shaped stay 36.3 extends perpendicularly to the axial direction of the container 26.
7 are fixed respectively.

On the other hand, in the high temperature fluid flow path 23 of the heat exchange section 25, as shown in FIG.
As shown in a), (b), (c) and Figure 4,
High-temperature fluid inlet and outlet headers 38 and 39 introduced from outside the container 26 are connected to each other, and these high-temperature fluid inlet and outlet headers 38 and 39 are connected to the high-temperature fluid flow path 23, respectively. 39 is communicated with through a long hole 40 bored therein.

In addition, the side plate 28, the heat exchange section 25, and the reinforcing channel section 32
．． 33, as shown in FIGS. 1(a) and 2, a plurality of partition plates 41 are provided perpendicularly fixed to the inner surface of the side plate 28. Further, a partition plate 42 extending in the axial direction of the container 26 is fixed to each of these partition plates so as to seal both sides of the low temperature fluid flow path 24. These partition plates 41 and 42 allow the low temperature fluid to flow through the low temperature fluid flow path 24.
This prevents the flow from becoming a bypass flow without passing through the flow. Furthermore, the partition plate 41 also functions as a stay for reinforcing the side plate 28.

〔Effect of the invention〕

According to this invention, the side plates of the container are closely packed into the heat exchange part, and a structure similar to that of the heat exchange part is formed between the side plates where the heat exchange part does not exist. A reinforcing channel is inserted and both ends of the container, which serves as a header for one of the heat exchange fluids, are made into half-cylindrical bodies, so the container can be made smaller and its plate thickness can be made thinner, making it smaller and lighter. can be achieved.

[Brief explanation of the drawing]

1(a), (b), (c) to FIG. 4 each show an embodiment of the plate-fin type heat exchanger of the present invention, and FIG. 1(a) is a longitudinal sectional view, and FIG. (b) is a side view;
Figure 1 (C) is a plan view, Figure 2 is a cross-sectional view taken along the line I [-II in Figure 1 (b), and Figure 3 is a cross-sectional view taken along the line (-) shown in Figure 1 (C). , Figure 4 shows ■-■ in Figure 1(b).
Line sectional views, Figures 5 (a), (b), and (c) respectively show conventional plate-fin type heat exchangers.
Figure (a) is a partially broken side view, Figure 5 (b) is a cross-sectional view,
FIG. 5(C) is a plan view of the main part. 20... Plate fin type heat exchanger, 21... Plate, 22... Flat plate fin, 25... Heat exchange part, 2
6... Container, 27... Side plate, 28... Side plate, 29
... Cylindrical body, 30 ... Low temperature fluid inlet side header, 31.
...Cryogenic fluid outlet side header, 32.33...Reinforcement channel section, /1.1, 4.2...Partition plate. Applicant Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] A heat exchange section is formed by alternately stacking plates and fins, and this heat exchange section is housed in a cylindrical container, and one end and the other end of the container are respectively connected to inlet side headers for one heat exchange fluid. In a plate-fin type heat exchanger with a header on the outlet side, both open ends of a cylinder consisting of a pair of opposing side plates and a pair of opposing side plates fixed to the end edges of the side plates are used as the header. Each of the side plates of the container is closed with a split cylindrical body to form a container, and the plate surfaces of each side plate of the container are brought into close contact with both end surfaces of the heat exchanger in the stacking direction, and the heat exchanger is sandwiched between both side plates. are provided parallel to the inflow and outflow direction of the one heat exchange fluid, and heat exchange is carried out continuously from the inlet side end and the outlet side end of the one heat exchange fluid in the heat exchange section to both ends of the cylindrical body of the container. A reinforcing flow path section consisting of alternately laminated plates and fins is installed at the same spacing as the section, and a partition plate is installed between the side plate of the container and the heat exchange section and the reinforcing flow path section to prevent bypass flow. A plate fin type heat exchanger characterized by the following: