JPS63180091A - Manufacture of heat exchanger - Google Patents

Abstract

PURPOSE:To secure the positive fixture of an end plate and coolant tubes by providing cutouts corresponding to the opening as the edges of long sides of the end plate, applying pressure on the cutouts by a press, and thus deforming the edges of the openings to fix the bent parts of the coolant tubes. CONSTITUTION:After bent parts 6 are inserted into openings 3, cutouts 8 are pressed. By this procedure, the edges 4 of openings 3 are deformed easily and an end plate 7 and bent parts 6 of coolant tubes 5 are put into a positively fixed state. Consequently, neither shaking nor slackening is produced during the working and the transportation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a fin-tube heat exchanger used in air conditioners, refrigerators, and the like.

BACKGROUND OF THE INVENTION In recent years, various types of heat exchangers have been required to be easy to manufacture and inexpensive.

An example of a conventional heat exchanger will be described below with reference to one drawing.

This conventional heat exchanger will be explained with reference to FIG.

1 is a large number of fins arranged in parallel, %2 is a rectangular end plate attached to both ends of the fin 1, 3 is a plurality of openings provided at appropriate locations along the long side of the end plate 2, and 4 is an opening. This is the edge of the portion 3, 6 is a refrigerant pipe, and 6 is a bent portion.

The method for manufacturing a heat exchanger as described above involves inserting a plurality of fins 1 into a straight refrigerant pipe 5 and bending them left and right several times in order with the fins 1 in close contact with each other, thereby forming the bent part of the refrigerant pipe 5. After that, in order to arrange the end plates 2 at both ends of the fin 1,
The end plate 2 and the refrigerant pipe 5 were fixed by press-fitting into the bent portion 6.

Problems to be Solved by the Invention However, in the above method, the opening 3 of the end plate 2
Since the refrigerant pipe 6 and the refrigerant pipe 6 are fixed by press-fitting the bent part e, there is a risk of contact with the end plate 2 during operation or vibration during transportation.
Shakiness and loosening phenomena were likely to occur due to impact.

In view of the above-mentioned problems, the present invention provides a method for manufacturing a heat exchanger in which end plates and refrigerant tubes are securely fixed.

Means for Solving the Problems - In order to solve the above problems, the method for manufacturing a heat exchanger of the present invention is to provide a notch corresponding to the opening in the long side edge of the end plate, and to make this notch. The bent portion of the refrigerant is fixed by applying pressure with a press and deforming the edge of the opening.

Function The present invention uses the method described above to allow the edges of the opening to be easily deformed by pressing the notches provided at appropriate locations on the end plate with a press, thereby making it possible to securely fix the bent portion.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of essential parts of a heat exchanger manufactured according to the present invention. In FIG. 1, numeral 1 denotes a large number of fins arranged in parallel as in the conventional example, and numeral 7 denotes end plates attached to both ends of the fin 10.

An opening 3 into which the bent part 6 of the refrigerant pipe 5 is inserted is provided along the long side of the end plate 7, and in order to manufacture a heat exchanger having a length larger than the long side of the end plate 7, the inside of the opening 3 is provided. If the notch 8 is pressed after inserting the bent part 6 into the holder, the edge 4 of the opening 3 will be easily deformed and the end plate 7 and the bent part 6 will be in a securely fixed state. There will be no looseness or looseness inside.

Effects of the Invention As described above, in the present invention, a notch is provided in the end plate, and the bent portion of the refrigerant pipe and the end plate are fixed by pressing the notch to deform the edge of the opening. Because of this, it is possible to provide a heat exchanger with no looseness or wobbling of the end plates.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of a heat exchanger for a refrigerator manufactured according to the present invention, FIG. 2 is an external perspective view of an end plate of the heat exchanger for a refrigerator, and FIG. FIG. 2 is a perspective view of a main part of a heat exchanger for a refrigerator. 1...Fin, 3...Opening, 4...
... Edge, 5 ... Refrigerant pipe, 6 ... Bend part, 7 ... End plate, 8 ... Notch (notch). Name of agent: Patent attorney Toshio Nakao and 1 other person/-
--Fin gauge-opening 8- depth of cut

Claims (1)

[Claims] Arranging rectangular end plates having openings along the long sides at both ends of a large number of fins arranged in parallel, and having notches corresponding to the openings on the edges of the long sides, and After inserting the bent part of the refrigerant pipe that passes through a large number of fins into the opening of the end plate, pressurize the cut with a press to deform the edge of the opening and fix the bent part of the refrigerant pipe. A method for manufacturing a heat exchanger, characterized in that: