JP2004353882A - Header plate for heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly versatile header plate having reduced manufacturing cost by requiring an easy-to-manufacture forming die for molding the header plate. <P>SOLUTION: The header plate comprises a trimmed frame body 2 having an annularly grooved portion 1 bent and formed at the peripheral edge to be fitted to a tank body and a plate body 5 having an outer periphery approximately matching to an opening 3 of the frame body 2 and a number of tube insertion holes 4 arranged side by side in longitudinally spaced relation. In the state that the plate body 5 is fitted and fixed to the edge of the opening 3 of the frame body 2 via a caulking means 6, it is brazed and fixed thereto into one unit. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a highly versatile header plate in which a header comprises a header body formed in an elongated box shape and a header plate.
[0002]
[Prior art]
A conventional heat exchanger header plate is formed integrally by pressing a metal plate. This header plate has a flat rectangular shape, an annular groove for fitting the tank main body formed on the outer peripheral edge, and a large number of tube insertion holes arranged in parallel in the longitudinal direction of the tank main body.
[0003]
[Problems to be solved by the invention]
A conventional heat exchanger header plate requires a press-molding die every time the number of tube insertion holes, the tube pitch, and the like are different even if the outer peripheral shape is the same.
In addition, since the shape of the header plate is required to be complicated and high precision, a great deal of labor and cost are required for manufacturing the mold.
Accordingly, it is an object of the present invention to provide a header plate having the same outer shape, which can meet various specifications, has high versatility, and is easy to manufacture a mold.
[0004]
[Means for Solving the Problems]
The present invention according to claim 1 comprises a press-formed body of a metal plate,
A frame-shaped frame body (2) having a rectangular outer periphery in a rectangular shape and an annular groove (1) formed on the periphery and bent to fit the tank body;
A plate body (5) having an outer periphery substantially aligned with the opening (3) of the frame-shaped frame (2), and having a large number of tube insertion holes (4) arranged in parallel in the longitudinal direction;
In a state where the plate body (5) is fitted to the edge of the opening (3) of the frame body (2) through the caulking means (6), the two are integrally brazed and fixed. It is a header plate for exchangers.
[0005]
The present invention described in claim 2 is based on claim 1,
In the caulking means (6), a claw (7) is integrally provided on one of a peripheral edge of the plate body (5) and an opening edge of the frame (2), and the claw (7) is provided on the other. A slit (8) or notch matching the
The heat exchanger header plate is formed by fitting the claw (7) into the slit (8) or the notch and crimping the claw (7).
[0006]
The present invention described in claim 3 is the invention according to claim 2,
The opening edge of the synthetic resin tank body (9) is fitted into the annular groove (1) of the frame body (2) via a sealing material (10), and both are fastened and fixed by the caulking means (11). It is a header plate for heat exchangers.
The present invention described in claim 4 is based on claim 2,
An opening edge of the metal tank body (12) is fitted into the annular groove (1) of the frame (2), and the fitting portion is brazed and fixed to the header plate for a heat exchanger.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view for assembling a header plate of the present invention, FIG. 2 is a perspective view of a main part of a heat exchanger using the header plate, and FIG. 3 is a view of the heat exchanger taken along line III-III in FIG. It is a principal part longitudinal cross-sectional view.
The header plate is composed of an assembly of a frame 2 and a plate body 5 each formed of a pressed metal plate. As shown in FIG. 1, the frame 2 has a rectangular planar outer periphery, and an annular groove 1 for fitting a tank main body is bent around the periphery, and the entire frame is formed in a frame shape. A plurality of slits 8 are formed at the opening edge of the opening 3 so as to be separated from each other.
[0008]
Next, the plate body 5 is formed in a rectangular flat plate shape, and its outer peripheral edge is formed slightly larger than the opening 3 of the frame 2. A large number of tube insertion holes 4 are formed at appropriate intervals as shown in FIG. 1 (A) or (B), and the hole edges are burred on the inner surface side. Further, on the periphery of the plate body 5, a claw portion 7 is formed so as to protrude at a position matching the slit 8 of the frame body 2.
In addition, the slit 8 of the frame 2 can be a notch instead.
[0009]
The plate body 5 thus configured is seated in the opening 3 of the frame body 2, and the respective claw portions 7 are inserted into the slits 8, which are caulked and temporarily fixed therebetween. At least one of the outer surfaces of the frame 2 and the plate body 5 may be formed of a metal plate coated with a brazing material, or a brazing material may be disposed between the two.
[0010]
[How to assemble the heat exchanger]
The heat exchanger using the header plate thus constructed can be assembled as follows as an example.
First, the periphery of the plate body 5 is seated on the edge of the hole of the opening 3 of the frame body 2, the claw 7 is inserted into the slit 8, and then the claw 7 is integrally fastened by caulking. . Also, a core having a number of tubes and fins arranged side by side is assembled, and then the header plate assembly is fitted to the end of the core, and each tube is inserted into the tube insertion hole 4 of the plate body 5. Next, the opening of the tube is expanded, and the space between the plate body 5 and the tube is fixed. In addition, instead of expanding the end opening of the tube so that the tube end is in close contact with the rim of the tube insertion hole, the outer periphery of the tube end is reduced in diameter, and the reduced diameter portion is inserted into the tube insertion hole. The base of the reduced diameter portion may be in contact with the edge of the tube insertion hole.
[0011]
The heat exchanger assembly thus formed is inserted into a high-temperature furnace to melt the brazing material and braze the components integrally and liquid-tight to complete the heat exchanger.
Next, in this example, as shown in FIG. 3, the opening edge of the synthetic resin tank body 9 is fitted into the annular groove 1 of the frame 2 via the sealing material 10 and the side wall of the frame 2 is swaged (swaking means). 11) Complete the heat exchanger by.
[0012]
Next, in order to complete the header plate of the heat exchanger having the same outer diameter and different tube pitches of the tube insertion holes 4, only the plate body 5 is manufactured by a new press die as shown in FIG. . In this case, it suffices to manufacture only the plate-shaped plate main body 5, so that the mold needs to have a relatively simple structure, and its manufacture and cost can be largely omitted. Then, the plate body 5 may be attached to the frame 2 in the same manner as in FIG.
[0013]
Next, FIG. 4 is a cross-sectional view of a main part of a heat exchanger using the header plate for a heat exchanger of the present invention. In this example, the opening edge of the metal tank body 12 is formed in the annular groove 1 of the frame 2. They are fitted and brazed and fixed together.
Therefore, the annular groove 1 of the frame 2 needs to be relatively shallow, and its width matches the thickness of the metal tank body 12. Then, it is inserted into a high-temperature furnace in the state of FIG. 4, and the components are integrally brazed and fixed to complete the heat exchanger.
[0014]
[Action and Effect of the Invention]
The header plate for a heat exchanger of the present invention comprises a frame 2 having a frame shape and a plate body 5 having an outer periphery substantially aligned with an opening 3 of the frame 2. It is fitted and fixed to the edge of the opening 3 of the body 2. Therefore, the plate main body 5 corresponding to various uses can be mounted on the common frame 2, and the die of the header plate can be simplified, so that the manufacturing cost of the header plate for the heat exchanger can be reduced as a whole.
[0015]
In the above configuration, the claw portion 7 is integrally provided on one of the peripheral edge of the plate body 5 and the opening edge portion of the frame body 2, and a slit 8 or a cutout portion matching the claw portion 7 is formed on the other side. The plate body 5 can be fixed to the frame 2 by fitting the portion 7 into the slit 8 or the notch portion and caulking the claw portion 7.
In this case, it is possible to provide an assembled header plate having a simple structure and easy to manufacture.
[0016]
In the above configuration, the opening edge of the synthetic resin tank body 9 is fitted to the annular groove 1 of the frame 2 via the sealing material 10, and the two can be fastened and fixed by the caulking means 11.
In this case, in particular, a header plate made of a press-formed product having a deep annular groove 1 can be easily manufactured. That is, the frame 2 and the plate main body 5 can be formed with higher precision by molding the frame 2 and the plate main body 5 with separate members than a complicated integrally formed body.
[0017]
In the above configuration, the opening edge of the metal tank body 12 can be fitted into the annular groove 1 of the frame 2 and the fitted portion can be fixed by brazing.
In this case, the brazing of the frame body 2 and the plate main body 5 and the brazing of the metal tank main body 12 can be performed simultaneously.
[Brief description of the drawings]
FIG. 1 is an explanatory view for assembling a header plate of the present invention.
FIG. 2 is a schematic perspective view of a heat exchanger core using the header plate.
FIG. 3 is a vertical sectional view of a main part of a heat exchanger using the header plate, cut along the line III-III in FIG. 2;
FIG. 4 is a longitudinal sectional view of a main part of a heat exchanger using another header plate of the present invention.
[Explanation of symbols]
Reference Signs List 1 annular groove 2 frame 3 opening 4 tube insertion hole 5 plate body 6 caulking means 7 claw 8 slit 9 synthetic resin tank body 10 sealing material 11 caulking means 12 metal tank body 13 fin 14 tube

Claims (4)

Each consists of a pressed metal plate,
A frame-shaped frame body (2) having a rectangular outer periphery in a rectangular shape and an annular groove (1) formed on the periphery and bent to fit the tank body;
A plate body (5) having an outer periphery substantially aligned with the opening (3) of the frame-shaped frame (2), and having a large number of tube insertion holes (4) arranged in parallel in the longitudinal direction;
In a state where the plate body (5) is fitted to the edge of the opening (3) of the frame body (2) through the caulking means (6), the two are integrally brazed and fixed. Exchanger header plate. In claim 1,
In the caulking means (6), a claw (7) is integrally provided on one of a peripheral edge of the plate body (5) and an opening edge of the frame (2), and the claw (7) is provided on the other. A slit (8) or notch matching the
A header plate for a heat exchanger, wherein the claw (7) is fitted into the slit (8) or the notch and the claw (7) is caulked. In claim 2,
The opening edge of the synthetic resin tank body (9) is fitted into the annular groove (1) of the frame body (2) via a sealing material (10), and both are fastened and fixed by the caulking means (11). Header plate for heat exchanger. In claim 2,
A header plate for a heat exchanger, wherein an opening edge of a metal tank body (12) is fitted in an annular groove (1) of the frame (2), and the fitted portion is brazed and fixed.

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