JPH06331291A - Fin tube type heat exchanger - Google Patents

Abstract

PURPOSE:To provide a prominent heat exchanger in which small fins are reinforced by reinforcement plates not to folded or bent, so that a wind passage between the small fins may not be clogged, and thereby a stable performance can be obtained, and further, hereafter saving of material will be realized by making the small fins thinner and thinner. CONSTITUTION:The fin tube type heat exchanger is formed of small fins 1 which are divided into small pieces and arranged at a prescribed pitch, reinforcing plates 24 and a heat medium pipe 2 which crosses at right angles the small fins 1 and the reinforcing plates 24. In this instance, the reinforcing plates 24 are provided at a prescribed interval at a part where the small fins 1 contact with a curving metal die, when the heat medium pipe 2 is partly curved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fin tube type heat exchanger used for refrigeration / air conditioning equipment and the like.

[0002]

2. Description of the Related Art In recent years, fin-tube heat exchangers have been used in various fields in the refrigeration / air-conditioning industry, etc., as disclosed in Japanese Patent Laid-Open No. 64-57093, to meet the demand for compactness. There are various shapes such as those bent into L-shape, C-shape, and U-shape.

A conventional fin tube type heat exchanger will be described below. FIG. 14 shows a conventional fin-tube heat exchanger. In FIG. 14, reference numeral 1 is a small piece fin whose surface is slit, which is finely divided and arranged at a predetermined pitch. Reference numeral 2 denotes a meandering heat medium pipe, which is provided orthogonal to the small piece fins 1 and constitutes a fin tube type heat exchanger 3.

[0004]

However, when the partially tubed fin-type heat exchanger is manufactured by the above-mentioned method, the slit-processed small fins are inclined when the slit-processed small fins are thinned. Since the small fins do not contact the bending mold perpendicularly and the stiffness of the small fins is weak, the small fins contacting the bending mold partly bend, blocking the air passage between the small fins as shown in FIG. 15 and reducing the heat exchange efficiency. Had challenges. Further, when the small piece fins are severely bent, the heat medium tube may be buckled, and the fin tube type heat exchanger may not be used.

In view of the above problems, the present invention provides a fin tube type heat exchanger in which bending of the small fins or buckling of the heat medium pipe does not occur even when the small fins slit on the surface are made thin. It is a thing.

[0006]

In order to solve the above-mentioned problems, the fin-tube heat exchanger of the present invention is such that a reinforcing plate is provided at a predetermined interval between small fins of a portion which is in contact with a bending die during bending. It is configured to have.

Further, the fin-tube type heat exchanger of the present invention is composed of small piece fins finely divided and arranged at a predetermined pitch, a reinforcing plate, and a heat medium tube orthogonal to the small piece fins and the reinforcing plate. When the heating medium pipe is partially curved, the heating medium pipe insertion portion and a reinforcing plate having notches communicating with the heating medium pipe insertion portion are provided at a predetermined interval in a portion in contact with the bending die. It was done.

[0008]

According to the present invention, the reinforcing plate is provided at a predetermined interval between the small fins of the portion which comes into contact with the bending die during the bending process with the above-described structure. The small piece fins, the reinforcing plate, and the heat medium pipe are firmly fixed by expanding the heat medium pipe. As a result, since the small piece fins and the reinforcing plate are in contact with the bending die perpendicularly to the bending die due to the rigidity of the reinforcing plate, the influence of the inclination of the slit is eliminated, the bending of the small piece fins is suppressed, and the buckling of the heat medium pipe is suppressed. Can be prevented.

[0009]

EXAMPLES Examples of the first invention of the present invention will be described below.
A description will be given with reference to the drawings.

FIG. 1 shows a fin tube type heat exchanger according to an embodiment of the first aspect of the present invention. In the figure, reference numeral 21 denotes a fin-tube heat exchanger, which is partially curved by a bending method similar to the conventional one to form an L-shaped fin-tube heat exchanger. FIG. 2 shows a reinforcing plate 24 in one embodiment of the first aspect of the present invention. FIG. 3 is a front view of an example of the small piece fin 1 that is slit.
FIG. 4 is a side view of the small piece fin 1, and FIG. 5 is a side view during bending.

As described above, according to this embodiment, since the reinforcing plates 24 are provided at a predetermined interval between the small fins 1 as shown in FIG. 5, the influence of the inclination of the slit processing can be eliminated. Since the small piece fins 1 and the reinforcing plate 24 vertically contact the bending die 5 during bending,
The small piece fin 1 is reinforced, bending can be prevented, and the thinness of the small piece fin 1 can be further reduced.

From the standpoint of workability, as shown in FIG. 7, two fin rods 29 are used to collect small fins 1 from a fin stocker and set on a workbench. FIG. 8 is a sectional view taken along line AA of FIG. 7. Next, the reinforcing plate 24 is inserted into a predetermined position. As shown in FIG. 8, the reinforcing plate 24 is connected to the position of the reinforcing plate 24 corresponding to the position where the round bar 29 is inserted. By providing the notch 25 and the guide portion 26,
The reinforcing plate can be inserted between the small piece fin 1 and the heat medium tube 2 by dropping it from above.

Since there is a slight gap between the width of the notch 25 and the outer diameter of the heat medium pipe 2, the heat medium pipe insertion hole of the small piece fin 1 and the heat medium pipe insertion hole 27 are formed in the reinforcing plate 24. Has the effect of positioning, small fin 1 and reinforcing plate 2
The heat medium tube 2 can be smoothly inserted into the space 4.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 9 shows a fin-tube heat exchanger according to a second embodiment of the present invention, which is partially curved by a bending method similar to the conventional one to form an L-shaped fin-tube heat exchanger.

10 and 11 show a reinforcing plate according to the second embodiment of the present invention. In the reinforcing plate shown in FIG. 11, the width of the notch is smaller than that in FIG. 10, and the portion where the heat medium pipe 2 and the reinforcing plate 8 contact each other is more than half the circumference. Therefore, when the heat medium pipe 2 is expanded, the heat medium is expanded. The center of the pipe 2 and the center of the heat medium pipe inserting portion 14 of the reinforcing plate 8 are surely aligned with each other.

As described above, according to this embodiment, as in the case of the first embodiment of the present invention, as shown in FIG.
Reinforcing plates 7 or 8 are provided between them at predetermined intervals. As a result, when the fin tube heat exchanger 31 is bent, the small piece fin 1 and the reinforcing plate 7 or 8 are vertically in contact with the bending die 5, so that the small piece fin 1 is reinforced and bending can be prevented. It is possible to further reduce the thickness of the small piece fin 1.

In terms of work, in the embodiment of the first aspect of the present invention, when the heat medium pipe 2 is passed through the reinforcing plate 24, there is no guide portion for inserting the heat medium pipe 2, so the heat medium pipe is not provided. 2 is difficult to insert into the heat medium tube insertion hole 27 of the reinforcing plate 24.

On the other hand, in the second embodiment of the present invention, the heat medium tube 2 and the small piece fin 1 are assembled and reinforced by the notches 9 or 13 communicating with the heat medium tube insertion portion 28 and the guide portions 10 or 12. Since the plate 7 or 8 can be set, the heat medium pipe 2 is not passed through the reinforcing plate 7 or 8, and the number of assembling steps can be further reduced. In the reinforcing plate shown in FIG. 8, the width of the notch 13 communicating with the heat medium pipe inserting portion is smaller than that in FIG. 10,
Since the contact portion between the heat medium pipe 2 and the reinforcing plate 8 is a semicircle or more, when the heat medium pipe 2 is expanded, the center of the heat medium pipe 2 and the center of the heat medium pipe inserting portion 14 of the reinforcing plate 8 coincide with each other,
Furthermore, the adhesion between the heat medium tube 2 and the reinforcing plate 8 is improved, the rigidity is increased, and the small fins 1 are less likely to fall.

The reinforcing plate 24, the reinforcing plate 7,
The reinforcing plate 8 may be divided into two or more with an appropriate interval when there are too many heat medium pipe insertion holes or heat medium pipe insertion portions and the length becomes too long as an integrated body.

[0020]

As described above, according to the first aspect of the present invention, the small piece fins finely divided and arranged at a predetermined pitch, the reinforcing plate, and the heat medium tube orthogonal to the small piece fins and the reinforcing plate are used. A fin-tube type heat exchanger characterized in that when a part of the heat medium pipe is curved, a reinforcing plate is provided at a predetermined interval in a portion in contact with a bending die, and small fins are reinforced by the reinforcing plate. The bending of the small piece fins is suppressed, stable performance can be exhibited without blocking the air passage between the small piece fins, and further, it is possible to obtain the effect of promoting the thinning of the small piece fins and reducing the material. It is possible to realize an excellent heat exchanger.

On the work surface, the small fins processed by the fin press and stocked in the stocker are taken out by two round bars, and reinforced when the small fins, the reinforcing plate and the heat medium pipe are assembled. The round bar can be removed by the notch that communicates with the heat medium pipe insertion part at the center of the plate, and the reinforcing plate can be easily set between the small piece fins, and the number of steps can be greatly reduced. You can

According to a second aspect of the present invention, the pieces are finely divided and arranged at a predetermined pitch.
The heat medium pipe is constituted by the heat medium pipes orthogonal to the small piece fins and the reinforcing plate, and when the heat medium pipe is partially curved, the heat medium pipe insertion holes and the heat medium pipe are provided at predetermined intervals only in a portion in contact with the bending die. A fin-tube type heat exchanger having a reinforcing plate having a notch communicating with the tube insertion hole, which has the same effects as the first invention and, in terms of work, has a heat medium tube insertion portion. Since the reinforcing plate can be set after the heat medium pipe and the small fins are assembled by the communicating notches, the heat medium pipe is not passed through the reinforcing plate, and the number of assembling steps can be further reduced. Also, the reinforcing plate has a small notch width,
Since the half of the contact area between the heat medium tube and the reinforcing plate is more than half the circumference, when the heat medium tube is expanded, the center of the heat medium tube and the center of the heat medium tube insertion part of the reinforcing plate coincide with each other, and the heat medium tube is reinforced. The adhesion of the plate is improved, the waist becomes stronger, and the small piece fins do not easily fall.

[Brief description of drawings]

FIG. 1 is a perspective view of a fin-tube heat exchanger according to an embodiment of the present invention.

FIG. 2 is a front view of a reinforcing plate according to an embodiment of the present invention.

FIG. 3 is a front view of a small fin according to an embodiment of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG.

5 is a side view showing a contact state between a bending die, a small fin and a reinforcing plate when the heat exchanger shown in FIG. 1 is bent.

6 is a side view showing a contact state between a bending die, a small fin and a reinforcing plate when the heat exchanger shown in FIG. 1 is bent.

FIG. 7 is a perspective view when a reinforcing plate is inserted into the small piece fin in the first embodiment of the present invention.

8 is a sectional view taken along line AA in FIG.

FIG. 9 is an external perspective view of a fin tube type heat exchanger according to a second embodiment of the present invention.

FIG. 10 is a front view of a reinforcing plate according to a second embodiment of the present invention.

FIG. 11 is a front view of a reinforcing plate according to a second embodiment of the present invention.

FIG. 12 is a perspective view when a reinforcing plate is inserted into a work-in-process product assembled with fins and a heat medium pipe in one embodiment of the second invention of the present invention.

13 is a sectional view taken along line BB in FIG.

FIG. 14 is an external perspective view of a conventional fin-tube heat exchanger.

FIG. 15 is a side sectional view showing a contact state between a bending die and a small piece fin when the heat exchanger shown in FIG. 14 is bent.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Small piece fin 2 Heat medium pipe 5 Bending die 7,8 Reinforcement plate 9 Notch communicating with heat medium pipe inserting portion 13 Notch communicating with heat medium pipe inserting portion 21,31 Fin tube heat exchanger 24 Reinforcing plate

Claims (2)

[Claims] 1. A small piece fin that is finely divided and arranged at a predetermined pitch, a reinforcing plate, and a heat medium tube that is orthogonal to the small piece fin and the reinforcing plate. A fin-tube heat exchanger characterized in that it has reinforcing plates at predetermined intervals in a portion in contact with a bending die when it is bent. 2. A small piece fin that is finely divided and arranged at a predetermined pitch, a reinforcing plate, and a heat medium tube that is orthogonal to the small piece fin and the reinforcing plate. A fin-tube type heat exchange characterized by having a reinforcing plate having a heat medium pipe insertion hole and a notch communicating with the heat medium pipe insertion portion at a predetermined interval in a portion contacting the bending die when bending vessel.