JP2002350083A - Inner fin for heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the amount of necessary materials and the resistance of fluid regarding to heat-exchanger inner fins placed in the inside of heat- exchanger tubes, etc. SOLUTION: In the inner fin for a heat exchanger, wave parts 11A, 11B formed by corrugating a sheet are integrally formed in succession in the direction at right angles to the direction of the waves, and the neighboring wave parts 11A, 11B are set off from each other, so that the waves are in different locations from each other in the wave directions. The neighboring wave parts 11A, 11B are connected only in the summit part P1 on one side of the wave parts 11A, 11B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner fin for a heat exchanger used and housed in a tube of a heat exchanger.

[0002]

2. Description of the Related Art Conventionally, in a heat exchanger such as a condenser, an inner fin is housed in a tube, and a fluid flowing in the tube is stirred to improve heat exchange efficiency. FIG. 7 shows a conventional inner fin. In this inner fin, a plurality of wave portions 1A and 1B formed in a rectangular wave shape of a plate material are continuously and integrally formed in a direction perpendicular to the wave direction. .

[0003] Adjacent wave portions 1A and 1B are mutually offset so that the positions of the waves are different in the wave direction, and are connected at a connection portion 2 where the waves overlap. Such an inner fin 3 is accommodated in a tube 4 as shown in FIG. 8, for example, and a flat portion 5 which is a crest of the rectangular wave portions 1A and 1B is brazed to the inner surface of the tube 4. Used.

[0004]

However, in such a conventional inner fin 3, since the wave portions 1A and 1B are formed in a rectangular shape, the flat portions 5 which are upper and lower wave crests which do not contribute to heat exchange. However, there is a problem that the area of the material increases and the amount of necessary material increases. Further, there is a problem that the resistance of the fluid flowing in the tube 4 increases by the thickness of the flat portion 5.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide an inner fin for a heat exchanger capable of greatly reducing the amount of necessary material and the resistance of fluid as compared with the prior art. I do.

[0006]

According to a first aspect of the present invention, there is provided an inner fin for a heat exchanger, wherein a corrugated portion formed by corrugating a plate material includes:
In the inner fin for a heat exchanger, a plurality of continuous waves are integrally formed in a direction perpendicular to the wave direction and the adjacent wave portions are mutually offset so that the positions of the waves are different in the wave direction. The parts are connected only at the top on one side of the wave part.

(Advantage) In the inner fin for a heat exchanger according to the first aspect, the adjacent wave portions are connected only at the top on one side of the wave portion. There is no need to form a flat portion. Therefore,
The amount of necessary material is reduced by the amount of the flat portion,
The resistance of the fluid flowing through the tube is reduced by the thickness of the flat portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. 1 and 2 show a first embodiment of an inner fin for a heat exchanger of the present invention.
The inner fin is formed by integrally forming a plurality of wave portions 11A and 11B formed in a wave shape of a plate material in a direction perpendicular to the wave direction.

Then, adjacent wave portions 11A and 11B are
The positions of the waves are offset from one another such that they differ in the wave direction. Also, the wave shape of the wave portions 11A and 11B is
It is formed in a right-angled triangular shape in which one side top P1 and the other side top P2 of the wave are connected by a slope L. And one side top P1
Is a flat portion 11a. In this flat portion 11a,
Adjacent wave portions 11A and 11B are connected to each other.

On the other hand, on the other side top P2 located on the opposite side of the one side top P1, the adjacent wave portions 11A, 11B
Are not interconnected and are separated. And
In this embodiment, the plate is made of aluminum. The heat exchanger inner fins 13 described above are:
As shown in FIG. 3, for example, it is used by being housed in a tube 15 of a condenser for air conditioning of an automobile.

In this embodiment, the tube 15 is formed by winding a plate material in a racing track shape, and the projecting portions 15a are formed by both ends of the plate material. Then, the inner fin 13 is accommodated in the tube 15 with the protruding portion 15a expanded. In this embodiment, the tube 15
The plate material is made of an aluminum clad material having a brazing material layer formed on one side of a core material, and the brazing material layer is located on the inner surface side of the tube 15.

Then, the flat portions 11 of the wave portions 11A and 11B are formed.
a and the other side top P2 are brazed to the inner surface of the tube 15. Inner fin 13 for heat exchanger described above
Then, the adjacent wave portions 11A and 11B are combined with the wave portions 11A and 1B.
Since the connection is made only at the flat portion 11a serving as the one-side top portion P1 of 1B, the amount of necessary material and the resistance of the fluid can be significantly reduced as compared with the conventional case.

That is, in the inner fin 13 for the heat exchanger described above, it is not necessary to form the flat portion 11a on the other side top portion P2 opposite to the one side top portion P1 of the wave portions 11A and 11B. The amount of necessary material can be reduced by the amount of
The resistance of the fluid flowing in the tube 15 can be reduced by the thickness of the plate 15.

Further, in the above-described inner fin 13 for the heat exchanger, the other side top P located on the opposite side to the one side top P1.
In FIG. 2, the adjacent wave portions 11A and 11B are not connected to each other and are separated from each other.
While reliably maintaining the offset amount of 1B, the wave portion 11
The pitch of A, 11B can be reduced, and the stirring efficiency can be further improved.

FIG. 4 shows a second embodiment of the inner fin for a heat exchanger according to the present invention. In this embodiment,
One side of the wave portions 11A and 11B is extended to form a tube portion 15b.
Are formed. The tube portion 15b is
A and 11B are extended so as to surround the outside.

In this embodiment, the plate material forming the corrugated portions 11A and 11B and the tube portion 15b is made of an aluminum clad material having a brazing material layer formed on one side of a core material, and is a surface inside the tube portion 15b. The brazing material layer is located at the bottom. And the flat part 11 of the wave parts 11A and 11B.
a and the other side top part P2 are brazed to the tube part 15b.

In this embodiment, the same members as those of the first embodiment are denoted by the same reference numerals, and the detailed description is omitted. In the inner fin for a heat exchanger of this embodiment, since the tube portion 15b is integrally formed outside the corrugated portions 11A and 11B, the tube in which the inner fin is housed can be easily manufactured.

FIG. 5 shows a third embodiment of the inner fin for a heat exchanger according to the present invention. In this embodiment,
The other top part P2 of the wave parts 11A and 11B is formed in an arc shape. That is, in consideration of the processing of the inner fins for the heat exchanger, it is actually difficult to form the other side top P2 at an acute angle, and the other side top P2 has an arc shape.

In this embodiment, the same members as those of the first embodiment are denoted by the same reference numerals, and the detailed description is omitted. FIG. 6 shows a fourth embodiment of the inner fin for a heat exchanger of the present invention. In this embodiment, the other side tops P2 of the wave portions 11A and 11B are formed in an arc shape.
Further, the corrugations of the corrugations 11A and 11B are formed substantially symmetrically about the top P1 on one side.

In this embodiment, the same members as those of the first embodiment are denoted by the same reference numerals, and the detailed description is omitted. In the embodiment described above, the tube 15
Although the example in which the present invention is applied to the inner fin arranged in the inside has been described, the present invention is not limited to such an embodiment. For example, the inner fin or the like arranged between the laminated plates of the laminated oil cooler Can also be widely applied.

[0021]

As described above, in the inner fin for the heat exchanger according to the first aspect, the adjacent wave portions are connected only at the top of one side of the wave portion. It can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of an inner fin for a heat exchanger of the present invention.

FIG. 2 is a sectional view showing an inner fin for a heat exchanger of FIG. 1;

FIG. 3 is an explanatory view showing a state in which the inner fin for a heat exchanger of FIG. 1 is housed in a tube.

FIG. 4 is a perspective view showing a second embodiment of the inner fin for a heat exchanger of the present invention.

FIG. 5 is a sectional view showing a third embodiment of the inner fin for a heat exchanger of the present invention.

FIG. 6 is a perspective view showing a fourth embodiment of the inner fin for a heat exchanger of the present invention.

FIG. 7 is a perspective view showing a conventional inner fin for a heat exchanger.

FIG. 8 is a front view showing a state where the inner fin for a heat exchanger of FIG. 7 is accommodated in a tube.

[Explanation of symbols]

 11A, 11B Wave part 11a Flat part 15 Tube 15b Tube part P1 One side top P2 Other side top

Claims (1)

[Claims] A wave part (11) formed by waving a plate material.
A, 11B) are continuously and integrally formed in a direction perpendicular to the wave direction, and the adjacent wave portions (11A, 11B) are formed.
B) is an inner fin for a heat exchanger in which the wave positions are offset from each other so that the wave positions are different in the wave direction. The adjacent wave portions (11A, 11B) are
1A, 11B). Inner fins for heat exchangers, which are connected only at the top (P1) on one side.