JPH0229435Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an end plate for a Finch-Ube type heat exchanger such as a refrigerator or a room air conditioner.

``Prior Art'' Finch-tube heat exchangers for refrigerators, room air conditioners, and the like are composed of pipes through which refrigerant flows, fins that radiate or absorb heat, and end plates for mounting and fixing the heat exchanger.

To manufacture the refrigerator evaporator shown in Fig. 5, first,
After arranging small pieces of independent fins 101 at predetermined positions in a fin arranging machine having a large number of grooves, two straight pipes 102 are inserted into the pipe insertion holes of the fins 101, and the outer diameter of the pipes 102 is expanded to form the fins. 101
and the pipe 102 are fixed, and a finch tube is manufactured.

Furthermore, after bending the finch tube into a meandering shape at multiple points in the next process, a pipe bending part receiving hole 104 is provided, which has a long hole shape into which the pipe bending part 103 can be inserted.
An end plate 105 having a fin row is attached to both sides of the fin row.

As a prior art for fixing end plates to this bent part of the pipe, Japanese Patent Application Laid-Open No. 58-22894 "Side Plate for Heat Exchanger"
There is JP-A-60-93295 ``Side plate for heat exchanger''.
As shown in FIGS. 6 and 7, in JP-A-58-22894, the periphery of the receiving hole 106 is deformed by inserting the pipe bent portion 103 into the elongated receiving hole 106, which is slightly smaller than the projected area of the pipe. A flange 107 is formed to fix the pipe and the end plate 108. In addition, the code|symbol 109 is a long hole. As shown in Figures 8 and 9, JP-A-60-93295
The pipe bending part 103 is inserted into the elongated receiving hole 111 in which the flange 110 is raised, and the flange 110 is bent back and pressed against the pipe to fix the pipe and the end plate 112. be. Reference numeral 113 is a long hole.

``Problems that the invention attempts to solve'' JP-A No. 58-22894 has a pipe and an end plate 1.
When fixing the flange 108, it deforms to follow the shape of the pipe, but it is not easy to raise the flange 107 and it is not possible to fix it sufficiently. In addition, the one in Japanese Patent Application Laid-open No. 60-93295 is
Even if the flange 110, which has once been plastically deformed and stands up, is bent back and pressed against the pipe, it cannot be properly fixed due to spring back.

The pipe bent part 103 is inserted into the receiving holes 106 and 111 of JP-A-58-22894 and JP-A-60-93295, and the periphery is deformed to form the flange 107, or the flange 110 is bent back to form the pipe and the end. In order to fix the plates 108 and 112, the insertion portions of the pipe and end plates 108 and 110 are required to have a high level of machining accuracy, which causes variations.
May be difficult to combine. Also, the pipe and end plate 1
Considering the connection with 08 and 112, it is impossible to use the machining force equivalent to that of a jig or tool. Furthermore, JP-A-58-22894
In the case of No. 2, the edge of the end face of the receiving hole 106 comes into contact with the side surface of the pipe and scratches the surface of the pipe, so pre-processing and bending of the pipe are required to prevent scratches.

``Means for solving the problem'' Therefore, the present invention fixes the pipe and the end plate with sufficient bonding force, makes the connection work easy, does not require high precision of the connection part, and makes it possible to fix the pipe and the end plate with sufficient bonding force. In order to provide a heat exchanger end plate that will not be damaged, protruding holding pieces that are deformed inwardly by a jig and holding the pipe from both sides are formed at both ends of the receiving hole, and each holding piece A protruding pawl is provided on the outside of the tip to prevent the tool from slipping.

``Example'' The manufacturing method of the refrigerator evaporator shown in FIG. Insert the pipe, expand the outer diameter of the pipe, fix the fin 1 and the pipe 2, and manufacture the fin tube.

Furthermore, in the next step, after bending this fin fin tube into a meandering shape at multiple points, end plates 5 having long pipe bending section receiving holes 4 into which the pipe bending section 3 can be inserted are attached to both sides of the fin row. .

As shown in FIG. 2, this end plate 5 has an elongated pipe bending part receiving hole 4 into which the pipe bending part 3 can be inserted. After the pipe bending part 3 is inserted into the receiving hole 4, it is deformed inwardly by a tool to form protruding holding pieces 6 at both ends of the receiving hole 4, which hold the pipe from both sides. In order to form this protruding holding piece 6, slits are cut on both sides of the receiving hole 4, respectively. In addition, each holding piece 6
A claw 7 for preventing the tool from slipping is provided protruding from the outside of the tip.

The pipe bending portion 3 is inserted into the receiving hole 4 of the end plate 5, and the holding pieces 6 are bent inward using a tool and held.

"Effect of the invention" As described above, the present invention fixes the pipe and the end plate with sufficient bonding force in order to hold and fix the pipe by bending the holding piece with a tool.
Moreover, the connection work is easy. Further, since the pipe and the end plate are connected using a tool, there is no need for highly accurate machining of the pipe and the receiving hole of the connecting portion. Furthermore, unlike the prior art, the pipe is not held by the edge portion of the end face of the plate, and the outer circumferential surface of the pipe is not damaged during connection. Moreover, when the holding piece is deformed with a tool, since the claws are protruded from the outside of the tip of the holding piece, the pipe can be reliably held by the holding piece without the tool slipping on the holding piece.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a heat exchanger using an end plate according to a specific embodiment of the present invention, Fig. 2 is a front view of an end plate according to an embodiment of the present invention, and Fig. 3 is a main part of the end plate. front view of the section,
Fig. 4 is a side view of Fig. 3, Fig. 5 is a perspective view of a conventional heat exchanger, Figs. 6 and 7 are views showing the main parts of the conventional example, Fig. 6 is a front view thereof, and Fig. 7 The figure is a longitudinal sectional view of Fig. 6, and Figs. 8 and 9 are views showing other conventional examples.
The figure is a front view thereof, and FIG. 9 is a side view of FIG. 8. 2...Pipe, 1...Fin, 3...Pipe bending portion, 5...End plate, 4...Receiving hole, 6...Holding piece, 7...Claw.

Claims (1)

[Scope of utility model registration request] An end plate that is attached to both sides of a row of fins of a heat exchanger in which the main body of a heat exchanger pipe is bent in a meandering shape and fins are arranged in parallel in multiple rows, and is long enough to allow insertion of the bent portion of the pipe bent in a meandering shape. After drilling a hole-shaped pipe bending part receiving hole and inserting the pipe bending part into the receiving hole, a protruding holding piece that is deformed inwardly by a tool and holds the pipe from both sides is inserted into the receiving hole. An end plate for a heat exchanger, characterized in that claws are formed on both ends and protrude from the outside of the tip of each holding piece to prevent a tool from slipping.