JP4207184B2 - Plate type heat exchanger and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate-type heat exchanger that joins both edges in the width direction of a pair of band-shaped metal plates to allow a first fluid to flow inside and a second fluid to flow outside, and a method for manufacturing the same.
[0002]
[Prior art]
In a conventional plate heat exchanger, a pair of plate-shaped metal plates are stacked in opposite directions to form an element by brazing and fixing its peripheral edge in a liquid-tight manner, and a plurality of elements are stacked. The communication holes formed at both ends in the longitudinal direction of each plate are in fluid-tight communication with each other to constitute a heat exchanger core.
[0003]
[Problems to be solved by the invention]
The conventional plate heat exchanger has a drawback that it requires a large number of plates, increases the number of parts, and is difficult to assemble.
Then, this invention makes it a subject to provide the plate type heat exchanger which can be manufactured easily and compactly, and its manufacturing method.
[0004]
[Means for Solving the Problems]
In the present invention described in claim 1, a pair of manifold portions (1) elongated in the longitudinal direction are formed by raising both sides in the width direction of the belt-like metal plate, and a small flange for joining is formed at the edge thereof. (2) has a pair of plates (3) (4) formed continuously, and the plane between both manifold parts (1) is bent into a wave shape,
A pair of plates (3) and (4) are overlapped so that the manifold portion (1) faces each other and their corrugations cross each other, and the plates are continuously joined by the small flange (2). And the core (5) is formed by folding at least one imaginary line (22a) parallel to the width direction.
In the folded portion (5a) or the end portion (5b) of the core (5), the pair of manifold portions (1) of one plate (3) and / or the other plate (4) are each in the width direction. And a burring portion (7) is formed by raising the hole edge of the entrance (6).
The respective entrances (6) are joined and fixed to the flat holes (9) of the pair of headers (8), and the first fluid (10) is passed through the headers (8) to the pair of plates (3). (4) is a plate-type heat exchanger that circulates on the inner surface side and in which the second fluid (11) circulates on the outer surface side in the width direction.
[0005]
The present invention according to claim 2 is the method according to claim 1,
The core (5) is folded back into a plurality of imaginary lines (22a) spaced apart from each other,
This is a plate heat exchanger in which the inlet / outlet (6) is formed in the folded portion (5a) of the core (5).
The present invention described in claim 3 provides the method according to claim 2,
The plate-type heat exchanger has a folded portion (5a) on only one side of the zigzag fold, and an inlet / outlet (6) is formed in each of the pair of manifold portions (1).
[0006]
The present invention according to claim 4 provides the method according to claim 2,
It is a plate type heat exchanger in which an inlet / outlet (6) is formed in each of the pair of manifold portions (1) at both folded and folded portions (5a).
The present invention according to claim 5 is the invention according to claim 3,
The zigzag folded folded portion (5a) of the core (5) is close to or in contact with the concentric small diameter pipe (20) and the large diameter pipe (21), and a pair of flat holes ( 9) is a plate type heat exchanger in which the inlet / outlet (6) is joined.
[0007]
The present invention described in claim 6 provides the method according to claim 1,
A plurality of cores (5) that are folded back in a U-shaped cross section and in which the entrances (6) are formed at both ends of the U-shaped opening;
A plurality of cores (5) are arranged radially between a concentric small diameter pipe (20) and a large diameter pipe (21), and each inlet / outlet (6) has a pair of flat flat holes (21) of the large diameter pipe (21). It is a plate type heat exchanger joined to 9).
[0008]
A seventh aspect of the present invention provides a method for producing the heat exchanger according to any one of the first to sixth aspects,
Respectively, the both sides in the width direction of the belt-like metal plate are raised to form a pair of manifold parts (1) elongated in the longitudinal direction, and a small flange (2) for joining is continuously formed on the edge thereof, and The plane between the two manifold portions (1) is bent into a corrugated shape, and one of the strip-shaped metal plates and / or the pair of manifold portions (1) of the other strip-shaped metal plates are respectively elongated in the width direction (6 And forming a pair of plates (3) (4) by raising the hole edge of the inlet / outlet (6) and applying a burring portion (7);
A pair of plates (3) and (4) are overlapped with each other so that the manifold portion (1) faces each other and the respective corrugations intersect each other, and the small flange (2) continuously connects the two plates. Joining, and
Next, the core (5) is formed by folding at least one imaginary line (22a) parallel to the width direction,
And a step of bonding and fixing the respective inlets / outlets (6) of the core (5) to the flat holes (9) of the pair of headers (8).
[0009]
The present invention described in claim 8 provides the method according to claim 7,
After the step of continuously joining the two plates (3) (4) with the small flange (2), the bent portion of the corrugated portion is provided at one or more positions of an imaginary line (22a) parallel to the width direction. A crushing process is provided so as to be sandwiched in the thickness direction,
This is a method for manufacturing a plate heat exchanger in which the crushing part (22) is folded back to form the core (5).
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, each embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of an essential part of a plate heat exchanger according to the present invention, FIG. 2 is a schematic perspective view showing an assembled state thereof, FIG. 3 is an explanatory view showing a manufacturing process of the heat exchanger core, and FIG. FIG. 5 shows a state after the pressing step in FIG. 3, and FIG. 5 is an explanatory view of both-end seam welding in FIG.
FIG. 6 is a partial cross-sectional perspective view showing another example of the core 5. 7 is an exploded perspective view of the main part showing another embodiment of the present invention, FIG. 8 is an assembled view of the same, FIG. 9 is a side view of the main part showing still another embodiment of the present invention, and FIG. FIG. 11 is a side view schematically showing the main part of another embodiment of the present invention.
[0011]
First, the heat exchanger shown in FIGS. 1 and 2 includes a core 5, a casing 13 that fits the outer periphery of the core 5, and a pair of headers 8 that communicate with the inside of the core 5. The core 5 is formed by overlapping a pair of plates 3 and 4 shown in FIG. 4 and joining the small flanges 2 provided on both edges in the width direction thereof by seam welding or the like, and then folding them at the position of the imaginary line 22a in FIG. It is a meandering meander.
Each of the plates 3 and 4 rises from both edges in the width direction of the band-shaped metal plate to form a pair of manifold parts 1 elongated in the longitudinal direction, and continuously forms a small flange 2 for joining at the edges. The plane between the two manifold portions 1 is formed in a curved shape.
[0012]
Such molding is performed by continuously supplying the material coil 18 to the press machine 17 in FIG. In this example, a pair of inlet / outlet ports 6 are arranged at regular intervals in the longitudinal direction of the strip-shaped metal plate in the manifold portion 1 of the plate 3 located on the upper side in FIG. And the edge part of each entrance / exit 6 is started up slightly, and the burring process part 7 is formed. Next, the pair of plates 3 and 4 are overlapped in opposite directions to align the small flanges 2 with each other. At this time, the corrugated part 19a on the plane of the plate 3 and the corrugated part 19b of the plate 4 are in contact with each other at any part, and their ridge lines intersect. That is, in the state of FIG. 4, the plate 3 has each ridge line of the waveform forming portion 19a formed in an inverted V shape, and the plate 4 has the ridge line of the waveform forming portion 19b formed in a V shape.
[0013]
In such a state, the small flanges 2 of the plates 3 and 4 are integrally and continuously fixed by electrical resistance welding by the seam welding machine 14 having a pair of mutually rotating electrodes. Next, in the web crushing press 16, only the corrugated portions 19a and 19b are sandwiched and pressure-bonded in the plate thickness direction on the virtual line 22a in FIG. 4, and the wave portion is flattened. Next, the core is formed by bending in a zigzag manner on the crushed virtual line 22a. In addition, the upper and lower ends of the zigzag folded core of the belt-shaped core are crushed and closed including the manifold portion 1, and the portions are welded and fixed integrally to be closed. In addition, the crushing part 22 does not reach the manifold part 1 part in the folding | returning bending part 5a.
[0014]
In the core 5 thus formed, the burring portions 7 are arranged in parallel on both sides in the width direction of one side surface of the zigzag fold. Therefore, as shown in FIG. 1, each burring portion 7 is fitted into the flat hole 9 of the header plate 8a, and the fitting portion is integrally welded or brazed. At the same time, the opening of the header 8 formed in an elongated box shape is aligned with the position where the flat holes 9 are arranged in parallel, and the header plate 8a and the edge of the header 8 are joined together by means such as welding. . Further, the casing 5 is fitted into the portion other than the header plate 8a of the core 5, and it is joined to the header plate 8a integrally.
In the heat exchanger thus configured, the first fluid 10 flows from one header 8, flows through the core 5 as shown in FIG. 1, and flows out from the other header 8 to the outside. Then, the second fluid 11 flows through the outer surface side of the core 5, and heat exchange is performed between the second fluid 11 and the first fluid 10.
[0015]
FIG. 6 is a perspective view showing a main part of another example of the core 5, in which outer fins 23 are arranged on the outer surface side of the manifold part 1 of the plates 3 and 4, and the tops of the outer fins 23 and the wave forming parts 19a and 19b. The tops of the two are made to coincide with each other.
The outer fin 23 can be removed.
Next, FIG. 7 is an exploded perspective view of a main part showing another example of the plate heat exchanger of the present invention. In this example, a burring portion 7 is provided to protrude from one side surface and the other side surface of the core 5. Then, header plates 8a are arranged on both sides of the core 5, a row of flat holes 9 are formed in each header plate 8a, and the flat holes 9 and the burring portion 7 are integrally brazed or welded. is there. FIG. 8 is an assembled perspective view.
[0016]
Next, FIG. 9 and FIG. 10 show another embodiment of the present invention. In this example, the core 5 is meandered in a zigzag manner, and it is bent radially. That is, the core 5 is disposed between the small-diameter tube 20 and the large-diameter tube 21, and the folded end surface on one side of the core 5 is disposed on the large-diameter tube 21, and the folded end surface on the other side is disposed on the small-diameter tube 20. And the burring process part 7 is protrudingly formed in the entrance / exit 6 of the folding | returning bending part 5a by the side of the large diameter pipe 21, It aligns with the flat hole 9 of the large diameter pipe 21, and both are joined.
Note that headers 8 are arranged at both axial end positions of the large-diameter pipe 21 as shown in FIG. And the 1st fluid 10 distribute | circulates the inside of the core 5 from one header 8, it distribute | circulates it to an axial direction, and it flows out from the other header 8. FIG. The second fluid 11 flows on the outer surface side of the core 5 in the axial direction. Then, heat exchange is performed between the first fluid 10 and the second fluid 11.
[0017]
Next, FIG. 11 shows still another embodiment of the present invention. In this example, a large number of cores 5 bent in a U-shape are arranged radially between the large-diameter pipe 21 and the small-diameter pipe 20, respectively. A burring portion 7 is formed in a protruding manner at the entrance / exit 6 at both ends of each core 5.
In addition, the both ends edge of each core 5 is obstruct | occluded.
[0018]
[Operation and effect of the invention]
In the plate type heat exchanger of the present invention, the manifold portion 1 is formed on both sides of the pair of plates 3 and 4, the hole edge of the entrance / exit 6 provided therein is raised, and the burring portion 7 is formed, The small flanges 2 at both edges of the pair of plates 3 and 4 are continuously joined and fixed, and the core 5 is formed by folding one or more imaginary lines 22a parallel to the width direction. Therefore, the core 5 itself can be easily manufactured, and the core 5 and the header 8 can be reliably bonded and fixed via the burring portion 7. Thereby, a highly reliable plate heat exchanger having a large heat transfer area can be provided.
[0019]
In the above-described configuration, the core 5 is folded back at a plurality of virtual lines 22a spaced apart from each other, and the entrance / exit 6 can be formed in the folded back portion 5a of the core 5. By comprising in this way, the plate-type heat exchanger with a compact and good performance with a large heat-transfer area can be provided.
In the above configuration, the entrance / exit 6 can be formed in each of the pair of manifold portions 1 by the folded portion 5a on only one side of the zigzag folding. In this case, the pair of headers 8 can be concentrated only on one side of the core 5, and a heat exchanger with good pipe attachment can be obtained.
[0020]
In the above-described configuration, the pair of entrances / exits 6 can be formed by both folded folded portions 5a of the zigzag folding. In this case, the internal fluid can be distributed more uniformly in each part of the core 5.
In the above-described configuration, the core 5 can be formed in a zigzag shape, and can be arranged in a donut shape between the concentric small diameter tube 20 and the large diameter tube 21 as a whole. In this case, the heat exchanger can be compact and easy to handle.
In the above-described configuration, a plurality of cores 5 folded in a U-shaped cross section can be provided, and the cores 5 can be arranged radially between the concentric small diameter tube 20 and the large diameter tube 21. Also in this case, the heat exchanger can be compact and easy to handle.
[0021]
In the method of manufacturing any one of the above heat exchangers, a pair of plates 3 and 4 are bent from a band-shaped metal plate, and then continuously formed by small flanges 2 existing at both edges in the width direction of the pair of plates 3 and 4. The core 5 can be formed by providing a step of joining the two plates to each other, and then folding back one or more lines along a virtual line 22a parallel to the width direction. By doing in this way, it becomes possible to manufacture the core 5 formed by folding back easily and quickly.
[0022]
In the above manufacturing method, after the step of joining the plates 3 and 4 continuously with the small flange 2, the bent portion of the waveform is sandwiched in the plate thickness direction at one or more positions of the virtual line 22a parallel to the width direction. Thus, the step of crushing is provided, and the core 5 can be formed by folding back at the crushing portion 22. By doing in this way, the curvature radius of the bending part of the core 5 can be made small, and the heat exchanger which is further compact and easy to manufacture can be provided.
[Brief description of the drawings]
FIG. 1 is an exploded explanatory view showing a main part of a plate heat exchanger according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing the assembled state.
FIG. 3 is an explanatory view showing a manufacturing process of a core 5 used in the heat exchanger.
FIG. 4 is an explanatory view showing an overlapping state of a pair of plates 3 and 4 formed by a press machine 17;
FIG. 5 is an explanatory diagram of a main part of both-end seam welding in FIG. 3;
FIG. 6 is an explanatory perspective view showing the main part of the core 5 of the heat exchanger of the present invention.
FIG. 7 is an exploded perspective view showing a main part of another example of the heat exchanger according to the present invention.
FIG. 8 is a perspective view showing the assembled state.
FIG. 9 is a side view of a main part showing still another embodiment of the present invention.
FIG. 10 is a perspective view showing the assembled state.
FIG. 11 is a main part explanatory view showing still another embodiment of the plate heat exchanger of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Manifold part 2 Small flange 3, 4 Plate 5 Core 5a Folding bending part 6 Entrance / exit 7 Burring process part 8 Header 8a Header plate 9 Flat hole
10 First fluid
11 Second fluid
13 Casing
14 Seam welding machine
15 Guide roller
16 Web crushing press
17 Press machine
18 Material coil
19a, 19b Waveform forming part
20 Small diameter pipe
21 Large diameter pipe
22 Crushing part
22a Virtual line
23 Outer fin

Claims (8)

A pair of manifold portions (1) elongated in the longitudinal direction are formed by raising both sides in the width direction of the belt-shaped metal plate, respectively, and a small flange (2) for joining is continuously formed on the edge thereof. The plane between both manifold parts (1) has a pair of plates (3) (4) bent in a wave shape,
A pair of plates (3) and (4) are overlapped so that the manifold portion (1) faces each other and the respective corrugations intersect each other, and the plates are continuously joined by the small flange (2). And the core (5) is formed by folding at least one imaginary line (22a) parallel to the width direction.
At the folded back part (5a) or the end part of the core (5), the pair of manifold parts (1) of one plate (3) and / or the other plate (4) are respectively elongated in the width direction. (6) is formed, and a burring portion (7) is formed by raising the hole edge of the entrance (6).
The respective entrances (6) are joined and fixed to the flat holes (9) of the pair of headers (8), and the first fluid (10) is passed through the headers (8) to the pair of plates (3). (4) The plate type heat exchanger which distribute | circulates to the inner surface side, and the 2nd fluid (11) distribute | circulates the outer surface side to the said width direction. In claim 1,
The core (5) is folded back into a plurality of imaginary lines (22a) spaced apart from each other,
A plate-type heat exchanger in which the inlet / outlet (6) is formed in the folded portion (5a) of the core (5). In claim 2,
A plate-type heat exchanger in which an inlet / outlet (6) is formed in each of the pair of manifold portions (1) at a folded portion (5a) on only one side of the zigzag fold. In claim 2,
A plate-type heat exchanger in which an inlet / outlet (6) is formed in each of the pair of manifold portions (1) at both folded and folded portions (5a). In claim 3,
The zigzag folded folded portion (5a) of the core (5) is close to or in contact with the concentric small diameter pipe (20) and the large diameter pipe (21), and a pair of flat holes ( 9) is a plate type heat exchanger in which the inlet / outlet (6) is joined. In claim 1,
A plurality of cores (5) that are folded back in a U-shaped cross section and in which the entrances (6) are formed at both ends of the U-shaped opening;
A plurality of cores (5) are arranged radially between a concentric small-diameter pipe (20) and a large-diameter pipe (21), and each inlet / outlet (6) has a pair of flat holes (9 ) Plate type heat exchanger joined to. In the method of manufacturing the heat exchanger according to any one of claims 1 to 6,
Respectively, the both sides in the width direction of the belt-like metal plate are raised to form a pair of manifold parts (1) elongated in the longitudinal direction, and a small flange (2) for joining is continuously formed on the edge thereof, and The plane between the two manifold portions (1) is bent into a corrugated shape, and one of the strip-shaped metal plates and / or the pair of manifold portions (1) of the other strip-shaped metal plates are respectively elongated in the width direction (6 And forming a pair of plates (3) (4) by raising the hole edge of the inlet / outlet (6) and applying a burring portion (7);
A pair of plates (3) and (4) are overlapped with each other so that the manifold portion (1) faces each other and the respective corrugations intersect each other, and the small flange (2) continuously connects the two plates. Joining, and
Next, the core (5) is formed by folding at least one imaginary line (22a) parallel to the width direction,
And a step of bonding and fixing the respective inlets and outlets (6) of the core (5) to the flat holes (9) of the pair of headers (8). In claim 7,
After the step of continuously joining the two plates (3) (4) with the small flange (2), the bent portion of the corrugated portion is provided at one or more positions of an imaginary line (22a) parallel to the width direction. A crushing process is provided so as to be sandwiched in the thickness direction,
A plate type heat exchanger manufacturing method in which a core (5) is formed by folding back at the crushing portion (22).

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