JPH06126544A - Manufacture of heat exchanger with fin - Google Patents

Abstract

PURPOSE:To simplify the manufacture of a heat exchanger by providing a thin slit-like hole in a part cut off in a fin working process and simultaneously carrying out a cutting-off process and bending process with a tension force. CONSTITUTION:A heat exchanger with fins s subjected to a working process in which a hole 3 is worked in a notch part 2 near the central from one end to provide at least two connections 4, 5 in predetermined positions in the longitudinal direction of the fin 1 and a thin slit-like hole 11 is worked in the opposite side to the notch part 2 relative to the central hole 3. A process in which after assembling the heat exchanger the upper and lower heat exchange parts 10, 11 are cut and bent at a predetermined angle to each other centering around the connection 5 between the central drilled hole 3 and notch port 2 by the use of a tension force and a connecting process in which heating piece of the upper and lower heat exchange parts 10, 11 are interconnected at the connection part 9 are employed to manufacture the heat exchanger with fins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a finned heat exchanger for an air conditioner.

[0002]

2. Description of the Related Art Conventionally, in a heat exchanger that is required to be compact or have high performance, as disclosed in Japanese Patent Publication No. 2-106228, a fin is disclosed as a method of manufacturing a heat exchanger having a bent portion. Process for machining a hole from one end to the notch and the vicinity of the center so as to have two or more connecting parts at predetermined positions in the longitudinal direction, and a cutting process for cutting between the notch and the hole And a bending step of bending the connecting portion so as to have a predetermined angle, and a connecting step of connecting the heat transfer tubes of the heat exchanger.

FIG. 6 shows a front view of the fin after the fin processing step. In the figure, 1 is a fin, 2 is a notch, and 3
Is a hole, 4, 5 is a connecting portion, 6 is a broken line connecting the notch 2 and the hole 3 provided in the connecting portion 5, and 7 is a hole through which the heat transfer tube 8 passes. Here, the connecting portions 4 and 5 are provided at two positions in order to secure the minimum connecting portion for preventing the fin 1 from being cut during the fin machining feed. FIG. 7 is a side view of the heat exchanger. In the figure, 8 is a heat transfer tube, and 9 is a U-shaped connecting tube that connects the heat transfer tube 8 of the upper heat exchange section 10 and the heat transfer tube 8 of the lower heat exchange section 11.

Next, the operation will be described. In FIG. 7, two or more connecting portions 4, 5 are provided at predetermined positions in the longitudinal direction of the fin 1.
The fins 1 each having a notch 2 and a hole 3 near the center thereof are overlapped with each other so that the heat transfer tube 8 is inserted, and then the heat transfer tube 8 is expanded and brought into close contact with the fin 1. After that, aiming at the hole 3 from the cutout portion 2, the broken line 6 of the connection portion 5
The connection part 5 is cut with a sharp blade as shown in FIG. 1, and the heat exchanger is bent so that the angle becomes a predetermined angle. After that, the upper heat exchange section 10
The heat transfer tube 8 of No. 1 and the heat transfer tube 8 of the lower heat exchange unit 11 are connected by the connecting tube 9.

[0005]

In the conventional method for manufacturing a heat exchanger with fins described above, the fin processing step, the cutting step,
The bending process, the connecting process, and the number of processes required for manufacturing the heat exchanger are large, and the facility cost is high and the manufacturing cost is high.

The present invention has been made to solve the above problems, and at the time of the fin processing step, a thin slit-like hole is formed in a portion to be cut, so that the cutting step and the bending step are simultaneously performed by a tensile force, The purpose is to simplify the manufacturing of heat exchangers.

[0007]

According to the method of manufacturing a heat exchanger with fins of the present invention, one end is provided with a cutout portion and a portion near the center so that two or more connection portions are provided at predetermined positions in the longitudinal direction of the fin. A hole is machined in the center hole, and a machining process that processes a small slit-shaped hole on the side opposite to the cutout part with respect to the center hole, and after assembling the heat exchanger, using the tensile force, the hole drilled in the center A process of cutting the upper heat exchange part and the lower heat exchange part so as to have a predetermined angle around the connection part between the notch part and bending them at the same time, and the upper heat exchange part and the lower heat exchange part. It is manufactured by a connecting step of connecting the heat transfer tube of No. 1 with a connecting tube.

[0008]

In the method of manufacturing a heat exchanger with fins according to the present invention, after the fin processing step, the cutting step with a sharp blade can be simplified and the cutting step and the bending step can be simultaneously performed by the tensile force, whereby the heat exchanger can be manufactured. It is possible to simplify.

[0009]

【Example】

Embodiment 1 FIG. 1 is a front view of a fin showing an embodiment of the present invention, and a method of manufacturing a heat exchanger with fins will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a heat exchanger fin, and two or more connecting portions 4, 5 are provided at predetermined positions in the longitudinal direction of the fin.
A hole 3 is formed from one end to the notch 2 and near the center so as to have a small slit-shaped hole 12 on the side opposite to the notch 2 with respect to the hole 3 in the center, and a tube through which the heat transfer tube 8 is passed. A first step of processing the hole 7 to form an upper heat exchange portion 10 and a lower heat exchange portion 11,

In FIG. 2, the fins 1 processed in the first step are superposed, the heat transfer tube 8 is inserted into the tube hole 7, the heat transfer tube 8 is expanded and brought into close contact with the fins 1, and then the notch 2 is formed. Slit-shaped hole 12 is cut using a pulling force with
At the same time, a second step of bending the upper heat exchanging portion 10 and the lower heat exchanging portion 11 at a predetermined angle,

After the second step, the heat transfer tube 8 is deformed from the third step in which the heat transfer tube 8 of the upper heat exchange section 10 and the heat transfer tube 8 of the lower heat exchange section 11 are connected by the connecting tube 9. It is possible to manufacture a heat exchanger having a bend in a state in which the fin 1 and the fin 1 are in good contact with each other without performing the heat treatment.

Example 2. FIG. 3 is a front view of a fin showing a second embodiment of the present invention, and 1 is a fin for a heat exchanger,
The notch 2 and the hole 3 near the center are machined from one end so that the fin 1 has two or more connecting parts 4 and 5 at predetermined positions in the longitudinal direction. A perforated intermittent hole 3 is formed on the side opposite to 2, and a pipe hole 7 for passing a heat transfer pipe 8 is formed to form an upper heat exchange portion 10.
And a first step of forming the lower heat exchange section 11,

In the second embodiment of the present invention, the second step and the third step are the same as those in the first embodiment, and the description thereof will be omitted.

Example 3. 4 is a front view of a fin showing a third embodiment of the present invention, in which 1 is a heat exchanger fin,
A hole 3 is machined from one end so as to have two or more connecting portions 4 and 5 at predetermined positions in the longitudinal direction of the fin, and the first notch portion 2 and the vicinity of the center are machined. 1
The second cutout portion 14 is formed on the side opposite to the cutout portion 2 in the thickness direction of the fin 1, and the pipe hole 7 through which the heat transfer pipe 8 is inserted is formed, and the upper heat exchange portion 10 and the lower heat exchange portion 10 are formed. A first step of forming the exchange part 11,

In the third embodiment of the present invention, the second step and the third step are the same as those in the first embodiment, and the description thereof will be omitted.

[0016]

As described above, according to the present invention, the fins are arranged in parallel at regular intervals and the airflow flows between them, and the heat transfer tubes in which the refrigerant flows inserted inside the fins at right angles. In the heat exchanger described above, a hole is machined from one end to a notch and a portion near the center so as to have two or more connecting portions at predetermined positions in the longitudinal direction of the fin, and a notch is formed with respect to the center hole. A process of processing a thin slit-shaped hole on the opposite side, and using the pulling force after assembling the heat exchanger, centering on the connection between the hole drilled in the center and the notch, the upper heat exchange Part and the lower heat exchange part are cut so as to have a predetermined angle and are bent at the same time, and the upper heat exchange part and the heat transfer pipe of the lower heat exchange part are connected by a connecting pipe. As a result, the heat exchanger manufacturing Etc. can be easily and has the advantage of providing a simplified production process.

[Brief description of drawings]

FIG. 1 is a front view of a fin showing a first embodiment of the present invention.

FIG. 2 is a side view showing the heat exchanger with fins according to the first embodiment of the present invention.

FIG. 3 is a front view of a fin showing a second embodiment of the present invention.

FIG. 4 is a front view of a fin showing a third embodiment of the present invention.

FIG. 5 is a side view of a fin showing a third embodiment of the present invention.

FIG. 6 is a front view showing a conventional fin.

FIG. 7 is a cross-sectional view showing a conventional finned heat exchanger.

[Explanation of symbols]

 1 Fin 2 Notch 3 Hole 4 5 Connection 7 Tube Hole 8 Heat Transfer Tube 9 Connection 10 Upper Heat Exchanger 11 Lower Heat Exchanger 12 Slit Hole

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[Procedure amendment]

[Submission date] August 7, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

FIG. 6 shows a front view of the fin after the fin processing step. In the figure, 1 is a fin, 2 is a notch, and 3
Is a hole, 4, 5 is a connecting portion, 15 is a broken line connecting the cutout portion 2 and the hole 3 provided in the connecting portion 5, and 6 is a hole through which the heat transfer tube 8 passes. Here, the connecting portions 4 and 5 are provided at two positions in order to secure the minimum connecting portion for preventing the fin 1 from being cut during the fin machining feed. FIG. 7 is a side view of the heat exchanger. In the figure, 8 is a heat transfer tube, 9 is an upper heat exchange section 10.
It is a connecting pipe that is processed into a U-shape to connect the heat transfer pipe 8 of 1 to the heat transfer pipe 8 of the lower heat exchange part 11.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

Next, the operation will be described. In FIG. 7, two or more connecting portions 4, 5 are provided at predetermined positions in the longitudinal direction of the fin 1.
The fins 1 each having a notch 2 and a hole 3 near the center thereof are overlapped with each other so that the heat transfer tube 8 is inserted, and then the heat transfer tube 8 is expanded and brought into close contact with the fin 1. After that, aiming at the hole 3 from the cutout portion 2, the broken line 1 of the connection portion 5
The connecting portion 5 is cut with a sharp blade as shown in 5 , and the heat exchanger is bent so as to have a predetermined angle. Then the upper heat exchange part 1
The heat transfer tube 8 of 0 and the heat transfer tube 8 of the lower heat exchange part 11 are connected to each other by a connecting tube 9
Connect with.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

[0009]

Embodiment 1 FIG. 1 is a front view of a fin showing an embodiment of the present invention, and a method for manufacturing a heat exchanger with fins will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a heat exchanger fin, and two or more connecting portions 4, 5 are provided at predetermined positions in the longitudinal direction of the fin.
A hole 3 is formed from one end to the notch 2 and near the center so as to have a small slit-shaped hole 12 on the side opposite to the notch 2 with respect to the hole 3 in the center, and a tube through which the heat transfer tube 8 is passed. hole
A first step of processing 6 to form an upper heat exchange section 10 and a lower heat exchange section 11,

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

In FIG. 2, the fins 1 processed in the first step are superposed, the heat transfer tubes 8 are inserted into the tube holes 6, and then the heat transfer tubes 8 are expanded and brought into close contact with the fins 1, after which the notch 2 is formed. Slit-shaped hole 12 is cut using a pulling force with
At the same time, a second step of bending the upper heat exchanging portion 10 and the lower heat exchanging portion 11 at a predetermined angle,

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

Example 2. FIG. 3 is a front view of a fin showing a second embodiment of the present invention, and 1 is a fin for a heat exchanger,
The notch 2 and the hole 3 near the center are machined from one end so that the fin 1 has two or more connecting parts 4 and 5 at predetermined positions in the longitudinal direction. A perforated intermittent hole 3 is formed on the side opposite to 2, and a pipe hole 6 for passing a heat transfer pipe 8 is formed to form an upper heat exchange portion 10.
And a first step of forming the lower heat exchange section 11,

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

Example 3. 4 is a front view of a fin showing a third embodiment of the present invention, in which 1 is a heat exchanger fin,
A hole 3 is machined from one end so as to have two or more connecting portions 4 and 5 at predetermined positions in the longitudinal direction of the fin, and the first notch portion 2 and the vicinity of the center are machined. 1
The second cutout portion 14 is formed on the side opposite to the cutout portion 2 in the thickness direction of the fin 1, and the pipe hole 6 through which the heat transfer pipe 8 is inserted is formed to form the upper heat exchange portion 10 and the lower heat exchange portion 10. A first step of forming the exchange part 11,

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of symbols] 1 fin 2 notch portion 3 hole 4 5 connection portion 6 tube hole 8 heat transfer tube 9 connection portion 10 upper heat exchange portion 11 lower heat exchange portion 12 slit-shaped hole

[Procedure Amendment 9]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideaki Nagatomo Inventor Hideo Nagatomo 3-chome 18-1 Shizuoka Mitsubishi Electric Corporation Shizuoka Manufacturing (72) Inventor Kazuaki Isono 3-18-1 Oka Shizuoka Mitsubishi Electric Corporation Company Shizuoka Factory (72) Inventor Seiji Kubo 3-18-1 Oga, Shizuoka City Mitsubishi Electric Corporation Shizuoka Factory (72) Inventor Katsuyuki Aoki 3-18-1 Oga Shizuoka City Shizuoka Corporation Within

Claims (1)

[Claims] 1. A heat exchanger comprising fins that are arranged in parallel at regular intervals and through which an air flow flows, and a heat transfer tube through which a refrigerant flows inserted inside the fins at right angles. Make a hole from one end to the notch and near the center so that there are two or more connecting parts at predetermined positions in the longitudinal direction, and make a thin slit-like hole on the side opposite to the notch with respect to the center hole. After the heat exchanger has been assembled and the heat exchanger has been assembled, the upper heat exchange part and the lower heat exchange part are centered around the connection between the hole formed in the center and the cutout part by using tensile force. A method for manufacturing a heat exchanger with fins, which is manufactured by a step of cutting so as to have an angle of, and a step of bending at the same time, and a connecting step of connecting the upper heat exchange section and the heat transfer tubes of the lower heat exchange section with connecting tubes.