JPH0120536Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a louver fin in a heat exchanger.

[Conventional technology]

There are two types of heat radiation louvers in heat exchangers such as radiators: inclined types and parallel types, but the inclined type is generally used.

FIG. 1 shows a part of a conventional radiator, in which 1 is an upper tank, 2 is a tube, 3 is a louvered fin, and 4 is an inclined louver.

FIG. 2 shows a conventional louvered fin, in which a large number of louvers 12 in two groups on the left and right are cut and raised in the fin 11 and are inclined in left and right directions opposite to each other.
There is a louver 12 between both louvers 12 and 12 groups.
A trapezoidal reinforcing protrusion 13 is formed parallel to the above.

Originally, for tilted louvers, the heat dissipation effect is better if all of them are tilted in the same direction, but when shaping the fins, the fins become distorted due to residual stress during louver forming. like,
A reinforcing band 13 is formed between the louvers 12 and groups of 12 having different inclination directions, and the directions of the residual stress of the louvers 12 in both groups are opposite as shown by the arrows, so that the stresses cancel each other out.

[Problem that the invention attempts to solve]

Therefore, in the conventional method, in order to cancel out the residual stress during louver molding, the inclination directions of the louvers in adjacent louver groups are reversed, although this reduces the heat dissipation effect.

An object of the present invention is to provide an inclined louver fin in which all the louvers are inclined in the same direction and which can be easily shaped without being distorted.

[Means for solving problems]

The above purpose is to cut a large number of louvers that are inclined in the same direction, and at the same time cut a cross section that is parallel to the louvers and that can generate residual stress in the opposite direction to the direction of residual stress that occurs when cutting and raising the louvers. This is achieved by a louvered fin for a heat exchanger formed with a shaped compensation bending zone.

[Effect]

The stress caused by attaching inclined louvers pointing in the same direction is offset by the purposefully shaped compensating ridges, so that the fins are not distorted during shaping.

〔Example〕

FIG. 3 shows the first embodiment of the present invention.
A large number of louvers 22 are cut and raised on the fin 21 at approximately regular intervals and are inclined toward the upper left.

At the left end of the fin 21, a floating piece 23b that faces the opening direction of the louver 22 and is parallel to the surface of the fin 21 is provided in series from the upper end of an inclined piece 23a that is parallel to the louver 22. ,
Inverted bend 23c above the surface of the fin 21
A horizontal U-shaped compensating ridge 23 is formed.

In the fin 21 of the first embodiment, the residual stresses when forming each louver 22 and the compensating ridge 23 are directed in opposite directions and cancel each other out, as shown by the arrows, so that the fin 21 is distorted. It can be easily shaped without having to do so.

FIG. 4 shows a second embodiment of the present invention.
Two groups of left and right louvers 32 are cut and raised in the fin 31 and are inclined toward the upper left.

Between the groups of louvers 32, there are an inclined piece 33a, a floating piece 33b, and an inverted bent part 33c similar to those in the compensation protrusion 23, and an inverted bent part 33c.
A compensating ridge 33 is formed, the tip of which is connected 33d to the fin 31.

Similar to the fin 21 described above, this fin 31 can also be easily shaped because the residual stress of each louver 32 and the compensating ridge 33 cancel each other out.

Although not shown, the compensation protrusion 23,
33 may be mixedly installed on the same fin.

[Effect of idea]

Although the fin of the present invention can be easily shaped like the conventional fin, all the louvers are inclined in the same direction, so the heat dissipation effect is better than that of the conventional fin.

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing a part of the radiator, FIG. 2 is a center longitudinal sectional side view illustrating a conventional louver fin, and FIG. 3 is a center longitudinal sectional side view of the first embodiment of the present invention. , FIG. 4 is a central longitudinal sectional side view of the second embodiment. 1... Tank, 2... Tube, 3... Finn, 4... Louver, 11... Finn, 12...
Louver, 13...Reinforcement ridge, 21...Fin,
22... Louver, 23... Compensation protrusion, 23a...
... Inclined piece, 23b... floating piece, 23c... inversion bend (part), 31... fin, 32... louver,
33... Compensation protrusion, 33a... Inclined piece, 33b...
...Floating piece, 33c...Reverse bending (part), 33d...
...Connection part.

Claims (1)

[Scope of utility model registration request] Compensation by cutting a number of louvers that are inclined in the same direction, and creating a cross-sectional shape that is parallel to the louvers and generates residual stress in the opposite direction to the direction of residual stress that occurs when cutting and raising the louvers. A louvered fin for a heat exchanger that forms a bent band.