JP3808573B2 - Core structure of heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a core portion structure of a heat exchanger, and more particularly to a core portion structure of a heat exchanger in which both end portions of header plates arranged opposite to each other are connected by a reinforcement.
[0002]
[Prior art]
Conventionally, as a core structure of a heat exchanger such as a radiator formed by connecting both end portions of header plates arranged opposite to each other by a reinforcement, for example, what is disclosed in Japanese Utility Model Laid-Open No. 51-124954 is known. Yes.
FIG. 5 shows a core part structure of this type of heat exchanger. In the core part of this heat exchanger, a tube 3 and corrugated fins 5 are disposed between header plates 1 arranged to face each other at a predetermined interval. Are alternately arranged, and both end portions of the header plates 1 arranged opposite to each other are connected and reinforced by the reinforcements 7.
[0003]
The both ends of the tube 3 and the reinforcement 7 are inserted into the tube hole 1a and the reinforcement hole 1b formed in the header plate 1, and the header plate 1, the tube 3, the corrugated fin 5 and the reinforcement 7 are mutually connected. Are brazed in a heat treatment furnace.
FIG. 6 shows a method for assembling the core part of the heat exchanger described above. In this method, the reinforcements 7 are arranged on both sides of the alternately arranged tubes 3 and the corrugated fins 5, and the reinforcements 7 are blocked. The tube 3 and the reinforcement 7 are positioned at predetermined positions by being pressed by the member 9.
[0004]
On the other hand, the header plate 1 is disposed in a direction perpendicular to the tube 3 and the reinforcement 7, and the pad member 11 fitted and inserted into the header plate 1 is pressed toward the tube 3 by hydraulic pressure, whereby the tube 3 and the rain plate 7 are pressed. Both end portions 7a of the force 7 are inserted into the tube holes 1a and the reinforcement holes 1b formed in the header plate 1.
[0005]
[Problems to be solved by the invention]
However, in the above-described method of assembling the core portion of the heat exchanger, the end portion of the reinforcement 7 is pressed by pressing the pad member 11 inserted into the header plate 1 toward the reinforcement 7 with a relatively large force by hydraulic pressure. 7 a is inserted into the reinforcement hole 1 b of the header plate 1, so that the displacement 7 remains between the end portion 7 a of the reinforcement 7 and the reinforcement hole 1 b of the header plate 1. When the end portion 7a is inserted into the reinforcement hole 1b of the header plate 1, for example, as shown in FIG. 7, between the end portion 7a of the reinforcement 7 and the reinforcement hole 1b, for example, about 0.2 mm. The gap L is formed, and it becomes difficult to seal the gap L by brazing, and cooling water may leak from this part. There was.
[0006]
The present invention has been made to solve such a conventional problem, and it is possible to easily and reliably maintain the gap dimension between the end portion of the reinforcement and the reinforcement hole within a permissible value. It aims at providing the core part structure of an exchanger.
[0007]
[Means for Solving the Problems]
In the core structure of the heat exchanger according to claim 1, tubes and fins are alternately arranged between header plates opposed to each other at a predetermined interval, and both end portions of the opposed header plates are connected to rain. In the core part structure of the heat exchanger connected by force, the end of the reinforcement is inserted into the reinforcement holes formed at both ends of the header plate, and the protrusion is pressed against the end face of the reinforcement Forming a recess, plastically deforming the end of the reinforcement toward the inner peripheral surface of the reinforcement hole, and placing at least one side of the reinforcement at a distance from the annular protrusion of the header plate. It is characterized by being arranged .
[0008]
(Function)
In the core part structure of the heat exchanger according to claim 1, the end of the reinforcement is inserted into the reinforcement hole of the header plate, and the protrusion is pressed to form the recess on the end face of the reinforcement, so that the end of the reinforcement is formed. Is plastically deformed toward the inner peripheral surface side of the reinforcement hole.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described in detail.
FIG. 1 shows details of the main part of FIG. 2, and FIG. 2 shows an embodiment of the core structure of the heat exchanger of the present invention.
In FIG. 2, the code | symbol 21 has shown a pair of header plate opposingly arranged at intervals in the up-down direction.
[0010]
An annular protrusion 21 a that accommodates an O-ring (not shown) is formed along the outer periphery of the header plate 21.
Tube holes 21b are formed in the header plate 21 at predetermined intervals in the longitudinal direction, and tubes 23 are inserted into these tube holes 21b.
A corrugated fin 25 is disposed between the tubes 23.
[0011]
The end portions of the header plates 21 arranged to face each other are connected by a reinforcement 27.
That is, a long hole-like reinforcement hole 21c is formed at both ends of the header plate 21, and an end portion 27a of the reinforcement 27 is fitted and brazed into the reinforcement hole 21c.
[0012]
In this embodiment, as shown in FIG. 1, projections described later are pressed on the end surface 27b of the reinforcement 27 to form recesses 27c and 27d, and the end 27a of the reinforcement 27 is inside the reinforcement hole 21c. After being plastically deformed toward the peripheral surface side, it is brazed.
In this embodiment, the header plate 21, the tube 23, the corrugated fins 25, and the reinforcement 27 are made of an aluminum clad material. For example, after a non-corrosive flux is applied, the header plate 21, the tube 23, the corrugated fins 25, and the reinforcement 27 are brazed together. Has been.
[0013]
Moreover, in this embodiment, formation of the recessed parts 27c and 27d to the end surface 27b of the reinforcement 27 mentioned above is performed at the time of the assembly | attachment of the core part of a heat exchanger, as shown in FIG.
That is, in FIG. 3, the reinforcements 27 are arranged on both sides of the alternately arranged tubes 23 and the corrugated fins 25, and by pressing the reinforcements 27 with the block members 29, the tubes 23 and the reinforcements 27 are brought into a predetermined position. Is located.
[0014]
On the other hand, the header plate 21 is disposed in a direction perpendicular to the tube 23 and the reinforcement 27, and the pad member 31 for positioning the header plate 21 is pressed toward the tube 23 by hydraulic pressure, whereby the tube 23 and the reinforcement 26 are pressed. 27 are fitted into tube holes 21b and reinforcement holes 21c formed in the header plate 21.
[0015]
In this embodiment, positioning pieces 33 are arranged on both sides of the pad member 31.
As shown in FIG. 4, the positioning piece 33 is formed with a protruding portion 33b for positioning on one side of the main body portion 33a.
A pair of protrusions 33c and 33d are formed at positions facing the reinforcement holes 21c on the other side of the main body 33a.
[0016]
These projections 33c and 33d have a right triangular prism shape, and an inclined surface 33e of 45 degrees is formed on the outside.
Therefore, in FIG. 3, when the pad member 31 inserted into the header plate 21 is pressed toward the tube 23 by hydraulic pressure, both ends of the tube 23 and the reinforcement 27 are formed in the tube hole 21 b and the rain formed in the header plate 21. 1 are formed in the end face 27b of the reinforcement 27 by the projections 33c and 33d of the positioning piece, and the end 27a of the reinforcement 27 is formed in the reinforcement hole 27c. 21c is plastically deformed toward the inner peripheral surface side.
[0017]
In the core portion structure of the heat exchanger configured as described above, the end portion 27a of the reinforcement 27 is fitted into the reinforcement hole 21c formed at both ends of the header plate 21, and the end surface 27b of the reinforcement 27 is inserted. The projections 33c and 33d are pressed to form the recesses 27c and 27d, and the end 27a of the reinforcement 27 is plastically deformed toward the inner peripheral surface of the reinforcement hole 21c. The dimension of the gap between the reinforcement holes 21c (for example, L dimension in FIG. 7) can be easily and reliably maintained within a permissible value, for example, a value of 0.1 mm or less.
[0018]
In the above-described embodiment, the example in which the pair of recesses 27c and 27d is formed on the end surface 27b of the reinforcement 27 has been described. However, the present invention is not limited to such an embodiment. Or three or more locations.
[0019]
In the above-described embodiment, the example in which the projections 33c and 33d having the right triangular prism shape are formed on the positioning piece 33 has been described. However, the present invention is not limited to such an embodiment. Protrusions can be used.
[0020]
【The invention's effect】
As described above, in the core portion structure of the heat exchanger according to claim 1, the end portions of the reinforcement are inserted into the reinforcement holes formed at both ends of the header plate, and the protrusions are formed on the end surfaces of the reinforcement. The concave portion was formed by pressing, and the end of the reinforcement was plastically deformed toward the inner peripheral surface of the reinforcement hole. Therefore, the gap dimension between the end of the reinforcement and the reinforcement hole was within the allowable value. Value can be easily and reliably maintained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing details of a main part of FIG.
FIG. 2 is a cross-sectional view showing an embodiment of a core structure of a heat exchanger according to the present invention.
FIG. 3 is an explanatory view showing a method of assembling the core part of FIG. 2;
4 is a perspective view showing details of the positioning piece of FIG. 3;
FIG. 5 is a cross-sectional view showing a core structure of a conventional heat exchanger.
6 is an explanatory view showing a method of assembling the core part of FIG. 5. FIG.
FIG. 7 is a cross-sectional view showing a fitting state between a conventional reinforcement hole and an end portion of the reinforcement.
[Explanation of symbols]
21 Header plate 21b Tube hole 21c Reinforce hole 23 Tube 25 Corrugated fin 27 Reinforce 27a End part 27b End surface 27c, 27d Recess 33c, 33d Protrusion

Claims (1)

Tubes (23) and fins (25) are alternately arranged between header plates (21) arranged to face each other at a predetermined interval, and both ends of the header plates (21) arranged to face each other are reinforced. In the core part structure of the heat exchanger connected by (27),
The end portion (27a) of the reinforcement (27) is fitted into the reinforcement hole (21c) formed at both ends of the header plate (21), and the end surface (27b) of the reinforcement (27) The protrusions (33c, 33d) are pressed to form recesses (27c, 27d), and the end portion (27a) of the reinforcement (27) is plastically deformed toward the inner peripheral surface of the reinforcement hole (21c). In addition, the core structure of the heat exchanger is characterized in that at least one side of the reinforcement (27) is arranged at a distance from the annular protrusion (21a) of the header plate (21) .

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