JPH0610590B2 - Heat exchanger and manufacturing method thereof - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fin tube type heat exchanger used for a radiator for a heating device and the like, and a method for manufacturing the same, and particularly, the position of the fins when the fin tubes are closely attached. Related to the fixing method of.

Configuration of Conventional Example and Problems Thereof As a general method for manufacturing a fin-tube heat exchanger, as shown in FIG. 1, a plurality of tubes 2 are passed through a plurality of fins 1 arranged in parallel, and a mandrel 3 is used. The tube 2 is expanded using. In this way, when the plurality of tubes 2 are provided, the fins 1 do not rotate around the tubes 2 when the fins 1 and the tubes 2 are in close contact with each other.

However, as shown in FIG. 2, a single tube 2 is penetrated through a large number of fins 1 and the tubes 2 are expanded to form the fins 1.
When the tube 2 and the tube 2 are brought into close contact with each other, the fin 1 rotates around the tube 2 when the mandrel 3 is inserted.
After fixing the tube somehow, expand the tube 2,
It is necessary to closely attach the fin 1 and the tube 2.

Conventionally, fixing of fins in this type of fin-tube heat exchanger has been performed as shown in FIGS. 3 and 4.

First, in FIG. 3, the fin 1 is inserted into the fin fixing tool 4 having a shape following the outer shape of the fin 1, then the tube 2 is penetrated through the fin 1, and then the tube 2 is expanded, whereby the fin 1 and the tube 2 are expanded. Was in close contact. The fin fixture 4 as described above is expensive in cost, and the fin 1
Since it requires a dedicated one according to the size of the manufacturing process, it has inevitably caused an increase in manufacturing cost and troublesome process control.

Further, as shown in FIG. 4, when the direction (angle) of the fins is changed within the same tube 2, a dedicated fixing tool 4'which is individually divided or has a different shape is required. When the direction of the fin 1 is changed many times with a small pitch, the fixture 4 '
Became more complex and was a factor in increasing capital investment.

Further, when using fins having different sizes in addition to the orientation of the fins 1, the fixture becomes more complicated, which is a major limitation in manufacturing the heat exchanger.

The object of the present invention is to solve the problems found in the conventional manufacturing method as described above, to reduce the facility cost, and to manufacture the heat exchanger and the fins in various directions and sizes in combination. It was made to obtain what is possible in a simple process as a manufacturing process.

Configuration of the Invention That is, the heat exchanger of the present invention is a single fin that has a hole formed in a substantially central portion and a large number of laminated fins at regular intervals, and a fin that penetrates the hole and is expanded and joined to the fin. The tube and the holes formed in each of the fins are provided with a notch or a supporting hole for supporting a fixing tool for positioning at a predetermined distance position. A large number of fins having holes are laminated at regular intervals, a single tube is passed through the hole, and a fixing for positioning is provided in a notch or a support hole provided at a predetermined distance from the hole. After arranging the tool and fixing the fin, the tube is expanded to bring the fin and the tube into close contact with each other.

As a result, the heat exchanger can be manufactured without using a dedicated fin fixing tool having a predetermined shape as in the prior art, and at the same time, it is possible to manufacture the heat exchanger in which the directions and sizes of the fins are variously combined and the heat exchanger.

Description of Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 5 shows an example of fins used in the present invention. The fin 5 has a square shape, and a tube through hole (hole portion) 7 through which the tube 6 penetrates is formed in the center, and a small-diameter support hole 8 is formed at a predetermined distance from the hole portion 7. . A fixing rod 9 as a fixture is inserted into the support hole 8. By setting the position of the support hole 8 for each fin 5, the fin 5 can be oriented in a desired direction, that is, can be closely attached to the tube 6 at an arbitrary angle. It is possible to do

Specific examples thereof are shown in FIGS. 6 and 7.

The heat exchanger of FIG. 6 has the same direction and size of the fins 5, and FIG. 7 shows the direction of the support holes 8, that is, the positions from the holes 7 are the same angle but different in size and size. This is an example in which fins 5a, 5b, 5c having different heights are combined. That is, in any case, as the heat exchanger, the fins 5, 5a, 5b, 5c in which a large number of holes 7 are formed in the substantially central portion and are spaced at regular intervals, and a pipe that penetrates the holes 7 and expands The fins 5, 5a, 5b, 5c, and the fins 5, 5a, 5b, 5c.
b and 5c are provided with a support hole 8 for supporting a positioning fixture 9 at a predetermined distance from the hole 7. In FIG. 6, the manufacturing method is as follows. First, a large number of fins 5 are laminated at regular intervals, and fixing rods 9 are inserted into the support holes 8 to fix the positions of the fins 5, and then the tubes 6 are fixed. The fin 5 and the tube 6 are brought into close contact with each other by expanding the pipe with a mandrel or water pressure.

Further, FIG. 7 shows that when the fins 5a, 5b, 5c are laminated at regular intervals, first, the fins 5a, 5
The holes 7 of b and 5c are inserted. Next, when the fixing rod 9 is penetrated through the support holes 8 of the fins 5a, 5b, 5c, the funnels 5a, 5b, 5c are positioned with a predetermined angle at which the support holes 8 are formed. When the tube 6 is expanded in this state, the fins 5a, 5b, 5c and the tube 6 are closely fixed.

In both the manufacturing methods shown in FIGS. 6 and 7, the fixing rod 9 is pulled out after the fins 5, 5a, 5b, 5c and the tube 6 are brought into close contact with each other.

In this way, even in Izushi, the fins 5, 5a, 5b, 5
It can be manufactured by using a dedicated jig according to the shape of c.

EFFECTS OF THE INVENTION As is clear from the above description, according to the present invention, when fixing the fin and the tube, the fixing of the fin does not require a fixing tool having a complicated shape as in the prior art, and a rod that simply penetrates the supporting hole or the notch. Such a fixing tool may be used, and the fins can be manufactured by combining various directions and sizes of the fins.

[Brief description of drawings]

1 to 4 are partial perspective views of a conventional manufacturing process in a fin tube type heat exchanger, and FIG. 5 is a front view of a fin used in a manufacturing method according to an embodiment of the present invention, FIGS. The drawings are partial perspective views showing a part of a manufacturing process according to a different embodiment of the present invention. 5, 5a, 5b, 5c ... Fins, 6 ... Tubes, 8
...... Support hole, 9 ...... Fixed rod (fixture).

Claims (2)

[Claims] 1. A fin in which a hole is formed in a substantially central portion and a large number of fins are laminated at regular intervals, a single tube which penetrates the hole and is expanded to join the fin, and each fin. A heat exchanger provided with a notch or a support hole formed in the hole for supporting a positioning fixture at a predetermined distance from the hole. 2. A plurality of fins each having a hole formed in a substantially central portion are laminated at regular intervals, a single tube is passed through the hole, and the fin is provided at a predetermined distance from the hole. A method for manufacturing a heat exchanger in which a fixing tool for positioning is arranged in the notch or the support hole to fix the fin, and then the tube is expanded to bring the fin and the tube into close contact with each other.