JPH0645182Y2 - Corrugated fin - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a corrugated fin having a louver.

[Conventional technology]

Conventionally, heat exchangers for automobiles have been used, for example, in Japanese Utility Model Laid-Open No. 63-97.
A corrugated fin as disclosed in Japanese Patent No. 078 is used.

FIG. 6 shows a heat exchanger using this type of corrugated fins, and reference numeral 11 denotes tanks which are arranged facing each other at a predetermined interval in the vertical direction. These tanks
A core portion 17 is formed between 11 by arranging tubes 13 and corrugated fins 15 alternately.

7 and 8 show the corrugated fin 15, and the corrugated fin body 19 of the corrugated fin 15 is shown.
Is formed, for example, by folding back a plurality of thin metal plates made of aluminum, and flat portions 21 and bent portions 23 are alternately and continuously formed.

A plurality of louvers 27 are formed on the flat portion 21 of the corrugated fin body 19 at predetermined intervals in the circulation direction of the cooling air 25,
These louvers 27 are cut and raised so as to face the cooling air 25. That is, the four louvers 27 on the windward side are
As shown in the figure, it is inclined to the windward side at an angle θ with the circulation direction of the cooling air 25, while the four louvers on the leeward side are inclined.
27 forms an angle θ with the flow direction of the cooling air 25 and is inclined to the leeward side.

In the corrugated fin 15 configured as described above, the cooling wind 25 flows between the louvers 27 in a V shape, and the front edge 29 of the louver 27 is formed.
The heat exchange efficiency of the corrugated fins 15 can be improved by the heat radiation effect by the so-called "leading edge effect".

[Problems to be solved by the device]

However, in such a conventional corrugated fin 15, the cooling air 25 does not flow through the louver 27 portion of the flat portion 21, and the bent portion 23 where the louver 27 is not formed and its vicinity hardly exchange heat. There is a case where it passes through, and in this case, there is a problem that the heat exchange efficiency decreases.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a corrugated fin capable of effectively circulating cooling air flowing through a bent portion and its vicinity toward a louver. To do.

[Means for Solving the Problems]

In the corrugated fin of the present invention, a plurality of thin metal plates are folded back to form a corrugated fin body in which flat portions and bent portions are alternately continuous, and the louver facing the cooling air is formed in the flat portion of the corrugated fin body. In a corrugated fin in which a plurality of tubes are abutted and fixed at predetermined intervals in the flow direction of the cooling air, in a bent portion of the corrugated fin body, further cut and raised at a predetermined interval in the flow direction of An air guide projection for guiding the cooling air toward the louver is integrally formed at a portion of the bent portion of the corrugated fin body located between the tubes.

[Action]

In the corrugated fin of the present invention, since the baffle portion of the bent portion of the corrugated fin body is integrally formed with the air guide protrusion that guides the cooling air toward the louver, the cooling that flows in the bent portion and its vicinity is cooled. The wind is guided by the air guide projection toward the louver on the leeward side of the air guide projection.

〔Example〕

Hereinafter, the details of the present invention will be described with reference to the embodiments shown in the drawings.

FIG. 1 shows an embodiment of the corrugated fin of the present invention. In FIG. 1, reference numeral 31 denotes a corrugated fin body formed by folding a plurality of aluminum thin metal plates back, for example. .

The corrugated fin body 31 includes a flat portion 33 and a bent portion 35.
And are formed alternately and continuously.

A plurality of louvers 39 are formed on the flat portion 33 of the corrugated fin body 31 at predetermined intervals in the flow direction of the cooling air 37,
These louvers 39 are cut and raised so as to face the cooling air 37. That is, the four louvers on the windward side
39 is inclined to the windward side at a predetermined angle with respect to the flow direction of the cooling air 37, while the four louvers 39 on the leeward side are provided to the leeward side at a predetermined angle to the flow direction of the cooling air 37. It is inclined.

In such a bent portion 35 of the corrugated fin body 31, two tubes 41 are provided at a predetermined interval in the flowing direction of the cooling air 37.
Are fixed in contact with each other. Note that, for example, cooling water flows through these tubes 41.

The tube of the bent portion 35 of the corrugated fin body 31
An air guide projection 43 that guides the cooling air 37 toward the louver 39 is integrally formed in a portion located between the 41.

As shown in FIG. 2 and FIG. 3, the wind guide protrusion 43 is a trapezoidal protrusion protruding from the bent portion 35 toward the flat portion 33 side, and is on the leeward side of the wind guide protrusion 43. The cooling air 37 is guided toward the louver 39 of the.

Such a wind guide portion 43 is formed at the same time as the bending portion 35 by the cutter forming the bending portion 35.

With the corrugated fin configured as above, the cooling air
The 37 flows in a V shape between the louvers 39, and the so-called leading edge effect of the louvers 39 can improve the heat exchange efficiency.

In the corrugated fin configured as described above, the bent portion 35 of the corrugated fin main body 31 located between the two tubes 41 is integrally provided with the air guide protrusion 43 that guides the cooling air 37 toward the louver 39. Since the cooling air 37 flowing through the bent portion 35 and the vicinity thereof is formed on the leeward side of the air guide projection 43 by the air guide projection 43, as shown by the chain double-dashed line in FIG. The so-called leading edge effect of the louver 39 allows the heat exchange efficiency of the corrugated fins to be significantly improved as compared with the conventional case, and the cooling water flowing in the tube 41 can be efficiently used. Can be cooled well.

Further, since the air guide projections 43 are formed in the portions of the bent portions 35 of the corrugated fin body 31 that are located between the tubes 41, the tubes 41 can be brought into sufficient contact with the corrugated fin body 31. Without reducing the heat conduction of
The heat exchange efficiency can be improved more than ever before.

4 and 5 show another embodiment of the present invention.
In this embodiment, a baffle projection 59 that guides the cooling air 57 toward the louver 55 is cut and formed in a portion of the bent portion 52 of the corrugated fin body 51 located between the tubes 53.

As shown in FIG. 5, the air guide projection 59 has a U-shaped cut in the bent portion 52, and that portion is in the flow direction of the cooling air 57 as shown in FIG. It is bent toward the louver 55 side so as to have an angle of θ ₁ .

Even with the corrugated fin configured as described above, it is possible to obtain substantially the same effect as that of the above-described embodiment.

In the embodiment shown in FIG. 1, the air guide projection 43 is a trapezoidal projection, but the present invention is not limited to the embodiment shown in FIG. The same effect as that of the embodiment shown in FIG. 1 can be obtained even if the windward projection is a triangular projection that is closer to the louver toward the leeward side.
The cooling air in the bent portion and its vicinity can be smoothly guided to the louver on the leeward side of the air guide projection.

Further, in the embodiment shown in FIGS. 1 and 4, two tubes 41, 41 are provided at the bent portions 35, 52 of the corrugated fin main bodies 31, 51 at a predetermined interval in the flowing direction of the cooling air 37, 57. Although the example in which the 53 is fixedly contacted has been described, the present invention is shown in FIGS.
The present invention is not limited to the embodiment shown in the figure, and three or more tubes are abutted and fixed to the bent portions of the corrugated fin body, and the air guide projections are formed in the bent portions located between these tubes. Of course, it is also good.

[Effect of device]

As described above, in the corrugated fin of the present invention, the bent portion of the corrugated fin main body is integrally formed with the air guide protrusion that guides the cooling air toward the louver at the portion located between the tubes. The circulating cooling air is effectively guided to the louver on the leeward side of the air guide projection by the air guide projection, and the so-called leading edge effect of the louver makes the heat exchange efficiency of the corrugated fin significantly higher than before. Can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a corrugated fin according to the present invention. FIG. 2 is a front view of FIG. FIG. 3 is a plan view of FIG. FIG. 4 is a plan view showing another embodiment of the corrugated fin according to the present invention. FIG. 5 is a perspective view showing an air guide protrusion formed on the bent portion of FIG. FIG. 6 is a front view showing a conventional heat exchanger in which corrugated fins are arranged. FIG. 7 is a perspective view showing a conventional corrugated fin. FIG. 8 is a vertical sectional view taken along the line VIII-VIII in FIG. [Explanation of symbols for main parts] 31,51 …… Corrugated fin body 33 …… Flat part 35,52 …… Bent part 37,57 …… Cooling air 39, 55 …… Louver 41, 53 …… Tube 43, 59 …… Blast guide.

Claims (1)

[Scope of utility model registration request] 1. A corrugated fin body in which flat portions and bent portions are alternately continuous by folding back a plurality of thin metal plates,
In the flat portion of the corrugated fin body, a plurality of louvers facing the cooling air are cut and raised at predetermined intervals in the circulation direction of the cooling air, and further, in the bent portion of the corrugated fin body, the circulation direction of the cooling air. In a corrugated fin in which a plurality of tubes are abutted and fixed at predetermined intervals, an air guide protrusion that guides the cooling air toward the louver at a portion of the bent portion of the corrugated fin body located between the tubes. A corrugated fin characterized by being integrally formed.