JPS6026300Y2 - corrugate fin - Google Patents

Description

[Detailed description of the invention] This invention aims to improve the corrugated fins used in the core part of heat exchangers, especially the no-ruva type corrugated fins, to improve the efficiency of Sekikoshi heat exchangers and also to increase the strength of the core part. It is an object of the present invention to provide such a corrugated fin that can be manufactured in a variety of ways, and that can also reduce the incidence of defective products.

For example, in a radiator as shown in FIG. 1, a core portion 5 made of a number of laminated flat tubes 3 and corrugated fins 4 is provided between an upper tank 1 and a lower tank 2. ,
While the fluid flows through the flat tubes 3, 3 from the upper tank 1 to the lower tank 2, the flat tubes 3, 3 and corrugated fins 4, 4
It is configured to be cooled by exchanging heat with the air flowing between them.

One type of corrugated fin 4 is a louver in which a large number of roof-shaped louvers 6.6 are cut out on the flat plate part 4a of the corrugated fin 4, which is formed by forming a band-shaped metal plate in a zigzag pattern, as shown in FIG. Type corrugated fins are often used.

However, with this Unaloopa type corrugated fin, objects tend to get stuck in the narrow gap between the louvers 6.
If 6 is clogged, the performance deteriorates, so it cannot be used in the radiator of a vehicle used in a dusty environment, such as a forklift.

For this reason, as shown in FIGS. 3 and 4, a no-louver type corrugated fin in which convex portions 7 and concave portions 8 are alternately formed on a flat plate portion 4a is mainly used in forklifts and the like.

In such a noruba type corrugated fin,
Air flows between the vertically adjacent flat plate portions 4a, 4a while colliding with the upper surface of the convex portion 7 and the lower surface of the concave portion 8,
Enough contact with the fin surface to improve the heat dissipation efficiency of the heat exchanger.

However, the conventional norlouver type corrugated fin formed and used as described above has the following disadvantages.

That is, the flat plate part 4 forms the convex part 7 and the concave part 8 and is connected vertically.
Since the bent portions 4b and 4b that connect a and b are formed in an arc shape, the contact area between the side surface of the flat tube 3 and the fins is small, and the heat of the cooling water flowing inside the flat tube 3 is transferred to the corrugated tube. It is not transmitted enough to fin 4.

Furthermore, since the width α of the flat plate portion 4a is considerably narrower than the width β of the fin 4, the widths of the convex portions 7 and recesses 8 formed in the flat plate portion 4a are also narrower.

Therefore, large gaps A, A are formed between the convex portions 7 and concave portions 8 of the fins 4 and the side walls of the flat tube 3, and the fins 4 pass through the core portion 3 without contacting either the fins 4 or the flat tube 3. Not only did air flow occur, but the convex portions 7 and concave portions 8 (height or depth) were not formed sufficiently high (deep).

In order to eliminate such inconveniences, the inventors of the present invention previously invented a corrugated fin 9 as shown in FIGS. 6 and 7 (Japanese Patent Application No. 54-01658).

6 and 7 show a corrugated fin in which convex portions 7 and concave portions 8 are formed instead of louvers in order to facilitate comparison with the normal corrugated fin of the present invention.

The corrugated fin 9 has a flat tube 3 constituting the core portion 5.
, 3, and a height H corresponding to the distance between the vertically connected flat plate parts 9a, 9a.
When assembling the core portion 5, the contact surface portions 9b that come into contact with the side surfaces of the flat tube 3 are made to alternately continue, and each of the flat plate portions 9a, 9
A convex portion 7 and a concave portion 8 are formed in each portion a.

In this way, the contact surface portion 9b that comes into contact with the flat tube 3 is connected to the flat plate portion 9.
In the corrugated fin according to the previous invention, which has a plane perpendicular to a, the continuous portions of each flat plate portion 9a and the contact surface portion 9b are bent at approximately right angles, so that each flat plate portion 9a,
A convex portion 7 and a concave portion 8 having approximately the same width as the corrugated fin 9 can be formed in the corrugated fin 9a.

Therefore, the height of the convex portion 7 and the depth of the concave portion 8 can be formed sufficiently high or deep, and the flow of air passing through the core portion 5 and the contact with the fins 9 can be made good.

Further, the corrugated fin 9 has a contact surface portion 9b that allows the flat tube 3 to
Since the corrugated fins are in contact with the side surfaces of the corrugated fins over a large area, the heat of the fluid flowing inside the tubes 3, 3 is sufficiently transferred to the corrugated fins.

However, in the corrugated fin 9 according to the previous invention formed as described above, depending on how the bending force is applied during manufacturing, the flat plate portion 9a and the contact surface portion 9b may be continuous or at right angles. If this is difficult and the continuous portion is not at right angles as shown in FIG. becomes difficult to do.

In order to eliminate the above-mentioned drawbacks, the present invention provides a corrugated fin in which the continuous portion between the flat plate portion and the contact surface portion can always be kept at right angles.

Hereinafter, the present invention will be explained with reference to drawings showing embodiments.

As shown in FIGS. 9 and 10, the corrugated fin 10 of the present invention has a flat plate part 11 orthogonal to the contact surface part 12, intermittently in the ventilation direction of the fin 10 (horizontal direction in FIG. 10). High parts 11a and lla are formed over the entire width of the flat plate part 11 and the contact surface part 12 to be higher than the intersection line, and a convex part 7 is formed on the upper surface of the high parts 11a and 11a. 11 is formed with a similarly recessed recess 8.

Since the flat plate portions 11 are formed as described above, the contact surface portions 12 between the flat plate portions 11.11 that are continuous above and below are formed in a meandering band shape.

Because it is formed as described above, in the corrugated fin 10 of the present invention, the continuous part between the flat plate part 11 and the contact surface part 12 has high rigidity, and the angle of the continuous part varies as shown in FIG. As a result, it is possible to easily and reliably form the angles of each continuous portion at substantially right angles.

Further, as a result of forming the convex portion 7 on the upper surface of the high portion 11a of the flat plate portion 11, a large difference in height between the upper surface of the convex portion 7 and the bottom surface of the concave portion 8 can be obtained, and the passage between the corrugated fins 10 can be made large. Air contacts the fins 10 well enough to improve the heat dissipation efficiency of the radiator.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a radiator using corrugated fins, Figure 2 is a perspective view of a louvered corrugated fin, and Figures 3-
Figure 5 shows the conventional Noruba type corrugated fin.
The figure is a front view, Figure 4 is a left side view, Figure 5 is a plan view, and Figure 6 is a front view.
7 shows a Renault louver type corrugated fin according to the prior invention, FIG. 6 is a front view, FIG. 7 is a plan view, FIG. 8 is a perspective view showing a deformed state of the corrugated fin according to the prior invention, and FIG. 10 shows a corrugated fin of the present invention, FIG. 9 is a perspective view, and FIG. 10 is a side view similar to FIG. 4. 3: Flat tube, 5: Core portion, : Convex portion, : Concave portion, 10 Nicol gate fin, 1a: High portion, 12: Contact surface portion. : flat plate part,

Claims (1)

[Claims for Utility Model Registration] A large number of flat tubes 3 formed by forming strip-shaped thin metal plates in a zigzag pattern.
A corrugated fin 10, which together with 3 constitutes the core part 5 of the heat exchanger, is a flat plate part 11.11 which is vertically connected to a flat plate part 11 having a width W commensurate with the spacing between the flat tubes 3.3.
In the corrugated fin 10, in which the flat plate part 11 and orthogonal flat contact surface parts 12 are alternately continued with a height H corresponding to the interval of A high portion 11a that extends intermittently over the entire width of the flat plate portion 11 and is higher than the intersection line at the orthogonal portion between the flat plate portion 11 and the contact surface portion 12. 11a, and a convex portion 7 is formed on the upper surface of the high portion 11a, lla.
.
A corrugated fin characterized by having a serpentine shape.