JPH09119792A - Fin for heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to facilitate the tube enlargement for heat exchanging by preventing the close contact of adjacent plate-like elements with each other or the disorder of irregular gap between the elements in the case of the tube enlargement for heat exchanging. SOLUTION: The fin for a heat exchanger comprises a platelike element 22 having a plurality of insertion holes 30 to be inserted with heat exchanging tubes and perforated thereat, and a collar 26 having a predetermined height formed with a flange 28 at the end and so stood as to surround the peripheries of the respective holes 30, wherein a protruding part 32 protruding at the flat surface of the element 22, and the collar 26 formed with the flange 28 at the end is so stood in the protruding direction of the part 32 as to surround the peripheral edges of the holes 30 perforated at the flat surface in such a manner that the area of the flat surface of the part 32 is wider than the area of the flange so formed as to be surrounded at the outermost edge of the flange 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger fin, and more specifically, a plurality of insertion holes into which heat exchange tubes are inserted are bored in a plate-like body, and the circumference of each of the insertion holes. A heat exchange fin in which a collar of a predetermined height having a flange portion formed at the tip end is provided so as to surround the.

[0002]

2. Description of the Related Art FIG. 5 shows a heat exchanger used in a cooler for homes and automobiles. In the heat exchanger of FIG. 5, a plurality of heat exchanger fins 10 each having an insertion hole for the heat exchange tube 18 formed between two side plates 12a and 12b having a length W have a predetermined gap. A stack 16 having a height H is formed by stacking via h. From one surface side of this laminated body 16 through each insertion hole provided in the heat exchanger fin 10 so that the opening of the heat exchange tube 18 projects from the other surface side of the laminated body 16, a U-shape The heat exchange tube 18 is inserted. In the opening of the heat exchange tube 18 protruding from the other surface side of the laminated body 16,
The U-vent pipe 22 is attached, and the heat exchange tubes 18 inserted in the laminate 14 are connected to each other.

In the heat exchange fin 10 constituting the heat exchanger shown in FIG. 5, a plurality of collared insertion holes 100 shown in FIG. 6 are conventionally formed in the plate member 102. In the collared insertion hole 100, a collar 108 having a predetermined height with a flange portion 106 formed at the tip end is provided upright so as to surround the periphery of the insertion hole 104 formed in the plate-shaped body 102. The height L of the collar 108 is equal to the gap h between the heat exchange fins 10 shown in FIG. Such a heat exchange fin 10 in which the collared insertion hole 100 is formed.
As shown in FIG. 7, the laminated body 16 in which a plurality of
The heat exchange tube 18 'is inserted through the collared insertion hole 100. Since the gap 24 shown in FIG. 7 exists between the inserted heat exchange tube 18 ′ and the collar 108, normally, the tube expansion billet 28 is inserted into the heat exchange tube 18 ′ to expand the tube. The expanded heat exchange tube 18 and the collar 108 are integrated.

[0004]

As shown in FIG. 7, the heat exchange performance of the heat exchanger can be improved by integrating the expanded heat exchange tube 18 and the collar 108. However, in the case of the commonly used U-shaped heat exchange tube 18 shown in FIG. 5, the U-shaped heat exchange tube 18 ′ inserted into the collared insertion hole 100.
When expanding the pipe, the U-shaped portion is positioned and expanded. Therefore, the shrinkage of the heat exchange tube 18 caused by the expansion of the heat is absorbed in the direction of the heat exchange tube 18 side expanded and integrated with the collar 108, that is, the opening side of the heat exchange tube 18 contracts. To be done. Like this
When the heat exchange tube 18 integrated with the collar 108 contracts, another plate-like body 102 that abuts the flange portion 106 formed at the tip of the collar 108 is pressed, and the plate-like body 102 'shown in FIG. As described above, the other plate-shaped body 102 may be deformed. When such deformation of the plate-shaped bodies 102 occurs, an abeck phenomenon in which the plate-shaped bodies 102 adjacent to each other along the heat exchange tube 18 are in close contact with each other or a turbulence phenomenon in which the gap h between the plate-shaped bodies 102 becomes non-uniform occurs. Easy to do. Such a heat exchanger in which the abeck phenomenon and the turbulence phenomenon of the plate-shaped body 102 occur is a defective product because the heat exchange performance is easily deteriorated. Therefore, an object of the present invention is to prevent the occurrence of a turbulence phenomenon in which the abec phenomenon in which adjacent plate-like bodies are closely contacted with each other and the gap between the plate-like bodies are nonuniform when expanding the heat exchange tube, It is an object of the present invention to provide a heat exchange fin that can easily expand a heat exchange tube.

[0005]

In order to solve the above-mentioned problems, the inventors of the present invention, when the heat exchange tube integrated with the collar contracts, contact the flange portion formed at the tip of the collar. The present invention has been achieved as a result of studying that it is effective to prevent the deformation of another plate-shaped body by strengthening the contact surface of the other plate-shaped body that is pressed in contact with it. That is, according to the present invention, a plurality of insertion holes into which the heat exchange tubes are inserted are formed in the plate-like body, and a flange portion is formed at the tip end portion so as to surround each of the insertion holes. In a heat exchange fin in which a collar of a predetermined height is erected, a protrusion having a flat surface is formed on the plate-like body and surrounds the periphery of an insertion hole formed in the flat surface. As described above, a collar having a flange portion formed at the tip is erected in the projecting direction of the projecting portion, and the area of the flat surface of the projecting portion is greater than the area of the flange portion surrounded by the outermost edge of the flange portion. It is a fin for heat exchangers, which is characterized by being wide. Further, in the present invention, a plurality of insertion holes into which the heat exchange tubes are inserted are formed in the plate-like body, and a flange portion is formed at the tip end portion so as to surround each of the insertion holes. In a heat exchange fin in which a collar of a predetermined height is erected, a recessed portion in which a flat surface is recessed is formed in the plate-like body and surrounds a peripheral edge of an insertion hole formed in the flat surface. As described above, a collar having a flange portion formed at its tip is erected upright in a direction opposite to the depression direction of the depression portion, and the flat surface area of the depression portion is surrounded by the outermost edge of the flange portion. It is also a fin for a heat exchanger characterized by having a partial area or more. The "area of the flat surface" in the present invention is a flat surface forming the upper surface or the bottom surface of the protrusion or the depression, and means the entire area of the flat surface including the opening of the collar insertion hole.

According to the present invention, the abutment portion of the plate-like body (hereinafter simply referred to as the abutment portion of the plate-like body) with which the flange portion of the collar end portion of the collared insertion hole formed in another plate-like body abuts. Sometimes referred to as) is the flat surface of the protrusion or depression. Therefore, the second moment of area of the projecting portion or the depressed portion including the flat surface which is the contact portion of the plate-shaped body is larger than that of the other flat portion of the same plate-shaped body. As a result, the abutting portion of the plate-shaped body receives the pressure of the flange portion formed on the other plate-shaped body, which is generated when the heat exchange tube integrated with the collar contracts during the tube expansion. Even if it is difficult to deform, it is possible to prevent the Abeck phenomenon or the like that occurs when the heat exchange tube is expanded.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the drawings. FIG. 1 is a partial sectional view of a collared insertion hole showing an example of the present invention. Insertion hole 2 with collar shown in FIG.
0 is one of a plurality formed on the plate-shaped body 22, and is formed on the circular flat surface of the protruding portion 32 protruding on the plate-shaped body 22. The collared insertion hole 20 has a collar 26 of a predetermined height having a flange portion 28 formed at a tip end thereof so as to surround the periphery of an insertion hole 30 formed at a substantially central portion of the flat surface of the protrusion 32. It is provided upright in the protruding direction of the protruding portion 32. The area of the flat surface of the protruding portion 32 (represented by the diameter B) is larger than the area of the flange portion surrounded by the outermost edge of the flange portion 28 (represented by the diameter A) as shown in FIG. Widely formed. Therefore, as shown in FIG. 2, when the heat exchanger fins having the collared insertion holes 20 shown in FIG. 1 are stacked and the heat exchange tubes 18 are inserted into the insertion holes 20, the heat exchange tubes 18 are inserted into the heat exchange tubes 18. The flange portion 28 provided at the tip of the collar 26 formed on the plate-shaped bodies 22 adjacent to each other along the
It contacts the flat surface of the inner surface of the protruding portion 32 formed at.
In the case of the collared insertion hole 20 shown in FIG. 1, the interval h between the plate-like bodies 22 shown in FIG. 2 is equal to the height L of the collar 26.

As described above, the flat surface of the plate-like body 22 with which the flange 28 abuts is a part of the projecting portion 32 having a larger second moment of area than the other flat portions of the plate-like body 22. Therefore, the flange portion 28 formed at the tip of the collar 26
Even in the other plate-shaped body 22 that abuts and is pressed against, the contact surface with the flange portion 28 can be strengthened. Therefore, when the heat exchange tube 18 inserted into the collared insertion hole 20 is expanded, the flange portion 28 causes the protrusion 32 to shrink as the heat exchange tube 18 integrated with the collar 26 contracts.
Even if the flat surface is pressed, the flat surface is unlikely to be deformed, and it is possible to prevent an abeck phenomenon of the plate-like body 22 that occurs when the heat exchange tube 18 is expanded. Further, when the heat exchange tube 18 is expanded, the collar 26 may be expanded along with the expansion of the heat exchange tube 18. In this case, in the collared insertion hole 20 shown in FIG. 1, the flat surface of the protruding portion 32 is the flange portion 2.
The flange portion 2 is formed wider than the area of the flange portion surrounded by the outermost edge of the flange portion 8,
A diameter expansion of 8 is acceptable.

On the other hand, in Japanese Patent Application Laid-Open No. 4-198691, as shown in FIG. 9, for a heat exchanger in which a plate-like member 102 is provided with a collared insertion hole formed on a flat surface of a projecting portion 110 projecting toward a collar forming side. Fins are suggested. The inner diameter of the flat surface of the protruding portion 110 (the area of the flat surface of the protruding portion 110) is the outer diameter of the flange portion 106 formed at the tip of the collar 108 (the area of the flange portion surrounded by the outermost edge of the flange portion 106). ), When the heat exchanger fins are stacked, the protrusions 110 and the flange portions 106 are fitted to each other, the heat exchanger fins adjacent to each other are positioned, and the heat exchange tube 18 into the collared insertion hole 18 It is easy to insert the. However, in the heat exchange fin shown in FIG. 9, when the inserted heat exchange tube 18 is expanded, when the collar 108 is expanded together with the expansion of the heat exchange tube 18, the outer peripheral edge of the flange portion 106 is Is pressed against the inner wall surface of the protrusion 110, so that the flange 106 may be deformed or the protrusion 110 may be deformed. Each of these deformations is caused by the plate-shaped body 102.
This may cause the gap between them to be disturbed.

In the collared insertion hole 20 shown in FIG. 1, the collar 26 is erected in the projecting direction of the projecting portion 32 on the flat surface of the projecting portion 32 projecting from the plate-like body 22, but shown in FIG. Similarly, the collared insertion hole 40 may be formed on the circular flat surface of the depressed portion 34 that is depressed in the plate-shaped body 22. The collared insertion hole 40 shown in FIG. 3 has a predetermined height in which the flange portion 28 is formed at the tip end portion so as to surround the periphery of the insertion hole 30 formed in the substantially central portion of the flat surface of the depressed portion 34. The collar 26 is erected in the direction opposite to the recessed direction of the recessed portion 34. Therefore, as shown in FIG. 4, when the heat exchanger fins having the collared insertion holes 40 shown in FIG. 3 are stacked and the heat exchange tube 18 is inserted into the insertion hole 30, the heat exchange tube 18 is inserted into the heat exchange tube 18. The flange portion 28 provided at the tip end portion of the collar 26 formed on the plate-shaped bodies 22 adjacent to each other along the
A depression 34 formed in the adjacent collared insertion hole 20.
Abutting the flat surface of the outer surface of the. In the case of the collared insertion hole 40 shown in FIG. 3, the gap h between the plate-like bodies 22 shown in FIG.
Is equal to the height L of the collar 26.

As described above, the flat surface of the plate-like body 22 with which the flange 28 abuts is a part of the depressed portion 34 having a larger second moment of area than the other flat portions of the same plate-like body 22.
Therefore, even in the other plate-like body 22 that is pressed against the flange portion 28 formed at the tip of the collar 26,
The contact surface with the flange portion 28 can be strengthened. Therefore, when the heat exchange tube 18 inserted into the collared insertion hole 40 is expanded, the flat surface of the depression 34 is formed by the flange portion 28 as the heat exchange tube 18 integrated with the collar 26 contracts. It is difficult to be deformed even when pressed, and it is possible to prevent an abeck phenomenon of the plate-like body 22 that occurs when the heat exchange tube 18 is expanded. By the way, the area of the flat surface forming the depressed portion 34 of the collared insertion hole 40 shown in FIG. 3 is formed larger than the area of the flange portion surrounded by the outermost edge of the flange portion 28. Another plate 22
It is sufficient that the flat surface of the depressed portion 34 formed in
The area of the flat surface of the depression 34 may be equal to the area of the flange portion. In addition, the insertion hole 2 with a collar shown in FIGS.
In Nos. 0 and 40, the flat surface of the protrusion 32 or the depression 34 is formed in a circular shape, but the shape of the flat surface of the protrusion 32 or the depression 34 can be any shape such as a square. .

The collared insertion hole 2 shown in FIGS. 1 and 3.
For manufacturing 0 and 40, after the protrusion 32 or the depression 34 is formed on the flat plate-shaped body 22, the protrusion 32 or the depression 34 is formed.
The collar 26 can be formed on the flat surface by a conventional method. That is, a burring process is performed on a hole having a diameter smaller than that of the insertion hole 30 formed on the flat surface by a burring punch having a diameter larger than the inner diameter of the hole and smaller than the insertion hole 30.
A projecting piece is erected on the small hole subjected to the burring process so as to surround the peripheral edge of the small hole. Then, in the small hole in which the protruding piece is erected, an ironing punch and a die having an outer diameter equal to that of the insertion hole 30 are used to expand the diameter of the small hole and to iron the protruding piece erected on the periphery of the small hole. The collar 26 is processed. After that, the front end of the collar 26 is bent to form a flange portion 28 so that the collar 26 has a predetermined height. The height L of the collar 26 becomes equal to the gap h between the plate-shaped bodies 22 when the heat exchanger fins are stacked.

[0013]

According to the present invention, when the heat exchange tube inserted in the insertion hole with the collar is expanded, the abeck phenomenon in which the plate-shaped bodies adjacent to each other adhere to each other and the gap between the plate-shaped bodies does not occur. It is possible to prevent the occurrence of a uniform turbulence phenomenon. Therefore, the heat exchange performance of the finally obtained heat exchanger can be sufficiently exhibited.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an example of a collared insertion hole formed in a heat exchanger fin according to the present invention.

FIG. 2 is a partial cross-sectional view showing a state in which the heat exchanger fins having the collared insertion holes shown in FIG. 1 are stacked.

FIG. 3 is a partial cross-sectional view showing another example of the collared insertion hole formed in the heat exchanger fin according to the present invention.

FIG. 4 is a partial cross-sectional view showing a state in which heat exchanger fins having the collared insertion holes shown in FIG. 3 are stacked.

FIG. 5 is a partial cross-sectional front view for explaining the heat exchanger.

FIG. 6 is a partial cross-sectional view showing a collared insertion hole formed in a conventional heat exchanger fin.

FIG. 7 is a partial cross-sectional view illustrating a pipe expansion state of a heat exchange tube inserted into a collared insertion hole formed in a heat exchanger fin.

FIG. 8 is a partial cross-sectional view for explaining the Abeck phenomenon of the heat exchanger fins.

FIG. 9 is a partial cross-sectional view for explaining a heat exchanger fin described in JP-A-4-198691.

[Explanation of symbols]

 10 Heat Exchanger Fin 18 Heat Exchange Tube 20, 40 Collar Insertion Hole 22 Plate-like Body 26 Collar 28 Flange Part 30 Insertion Hole 32 Projection Part 34 Cavity Part

Claims (2)

[Claims] A predetermined number of insertion holes into which heat exchange tubes are inserted are formed in a plate-like body, and a flange portion is formed at a tip end portion so as to surround each of the insertion holes. In a heat exchange fin in which a collar of a height is erected, a protruding portion having a flat surface is formed on the plate-like body, and surrounds the peripheral edge of an insertion hole formed in the flat surface. In addition, a collar having a flange portion formed at its tip is erected in the projecting direction of the projecting portion, and the area of the flat surface of the projecting portion is larger than the area of the flange portion surrounded by the outermost edge of the flange portion. A heat exchanger fin that is wide. 2. A predetermined portion having a plurality of insertion holes, into which heat exchange tubes are inserted, formed in a plate-like body, and a flange portion formed at a tip end portion so as to surround each of the insertion holes. In a heat exchange fin in which a height collar is erected, a recessed portion in which the flat surface is recessed is formed in the plate-shaped body, and the periphery of the insertion hole formed in the flat surface is surrounded. A flange having a flange formed at the tip thereof is provided upright in a direction opposite to the recessed direction of the recess, and the flat surface area of the recess is surrounded by the outermost edge of the flange. A fin for a heat exchanger having a surface area or more.