JPH0144200Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molding apparatus suitable for molding a heat exchanger, particularly a fin-and-tube air heat exchanger installed in an outdoor unit of an air-cooled separate package air conditioner.

An example of a fin-and-tube air heat exchanger used in an outdoor unit of an air-cooled separate package air conditioner is shown in Fig. 1. In Fig. 1, 1 indicates a single row of coils, and 2 indicates a 2-row coil. , 3a is a hairpin side plate for two rows of coils, 3
b is a hairpin side plate for the 1-row coil, 4a is a bend-side side plate for the 2-row coil, 4b is a bend-side side plate for the 1-row coil, 5 is a tube, and 6 is a screw connecting the upper and lower coils.

The first row coil 1 and the second row coil 2 are stacked,
Heat exchange coils are constructed with different numbers of rows at the front and rear, and these heat exchange coils are bent into an L-shape.

This heat exchanger has conventionally been molded as follows. That is, as shown in FIG. 2, the hairpin side side plate 3a, the fins 7, and the bend side side plate 4a are inserted into the tube 5, and the flat two-row coil 2a, which has been expanded and is not yet bent, is placed in the bending jig 10. It is placed on a fixed table 13 and a movable table 12. When the positioning is completed, the fixed table 13 and the movable table 12 are raised with the two-row coils 2a placed thereon until the upper surface of the second-row coil 2a comes into contact with the lower surface of the bending die 11, as shown in FIG. Next, the movable table 12 rotates in the direction of arrow 15 so that the upper surface of the second row coil 2a follows the bending radius R ₂ of the bending die 11, and the second row coil 2a follows the two-dot chain line in FIG. As shown, it is bent into an L shape to complete the two-row coil 2.

The bending radius of the bending die is the same as above for 1st row coil 1.
It is bent into an L shape along R ₁ .

The first row coil 1 and the second row coil 2 are stacked vertically and fixed with screws 6.

In the above conventional forming method, the number of bending steps is 1
Two steps are required: bending the row coil 1 and bending the second row coil 2. And the bending process is one row of coils 1 and 2.
Since the row coils 2 are separate, the bent portions of each coil may be misaligned, and in this case, there are problems in that it is not only unsightly but also difficult to assemble and install.

The present invention was proposed to solve the above problems, and its gist is that it includes a fixed table, a movable table, and a bending die, and the heat exchange coil on the fixed table is moved from the movable table to the bending die. In a heat exchanger forming device that bends along a bending radius and forms a heat exchanger having a predetermined bending edge,
Attachments with dimensions corresponding to the dimensional difference between the small number of rows of the heat exchange coils having different numbers of rows before and after the bending die are attached to positions corresponding to the coil portions with a small number of rows, and the heat exchange coils are simultaneously bent and formed. A heat exchanger molding apparatus is characterized by the following. However, since the present invention has the above configuration, it is possible to simultaneously bend and form heat exchange coils having different numbers of rows in the front and rear in one process, and there is no deviation in the bending position of each coil. , the heat exchanger can be easily assembled and installed, and its unsightly appearance can be eliminated.

Hereinafter, the present invention will be explained in detail with reference to an embodiment shown in FIGS. 5 to 7.

As shown in FIG. 5, the flat plate-shaped two-row coil 2a before bending and the same one-row coil 1a are fixed with screws 6 and positioned on the fixed table 13 and movable table 12 of the bending jig 20. It is placed on the table.

As shown in FIG. 6, an attachment 19 is attached to the outside of the bending die 11 at a position corresponding to the positioned first row of coils 1a. The thickness H of this attachment 19 is approximately the same as the difference H between the second row coil 2a and the first row coil 1a. Further, the radius of the outer circumferential portion of the attachment 19 is approximately the same as the radius _R1 when bending the first row of coils 1a.

With the coils 1a and 2a positioned, when the fixed table 13 and the movable table 12 are raised until the upper surfaces of the two rows of coils 2a touch the bending die 11,
The upper surface of the first row coil 1a is in contact with the attachment 19 attached to the bending die 11, and the left end of the attachment 19 is in contact with the second row coil 2 as shown in FIG.
It exactly matches the boundary line between a and the first row coil 1a. In this state, the movable table 12 of the bending jig 20
When the coils 2a and 1a are made to stand up and a bending process is performed using the same method as in the conventional method, the second row coil 2a and the first row coil 1a are bent simultaneously into an L-shape.

In this way, the bending process of the heat exchange coil in which the second row coil 2 and the first row coil 1 are arranged one behind the other and is bent inward in an L shape can be shortened to one step. Also, 2nd row coil 2 and 1st row coil 1
This eliminates the misalignment of the bending position and the unsightly appearance.

In the above embodiment, a heat exchange coil consisting of a first row coil 1 and a second row coil 2 was described, but for example, the second row and third row, the second row and fourth row, or the second row and third row and four rows
The present invention can also be applied to coils in which there are two or more sections with different numbers of columns, such as columns, and coils in which the number of columns differs by two or more.

Moreover, although the case where it is bent into an L-shape has been described, it is also possible to bend it at an arbitrary angle, and it can also be bent into a U-shape.

Furthermore, as shown in FIG. 8, the present invention can also be applied to bending and forming a heat exchange coil in which a single row of short coils 22 is disposed and fixed inside a long outer coil 21.

[Brief explanation of drawings]

1 and 8 are perspective views showing one example of a heat exchanger molded by the device of the present invention, FIGS. 2 to 4 show conventional molding devices, and FIGS. are front views at different processes, 4th
The figure is a view taken along the - line in FIG. 3. Fifth
7 to 7 show one embodiment of the present invention, and FIG.
7 and 7 are front views in different steps, respectively, and FIG. 6 is a sectional view taken along the - line in FIG. 5. Fixed table...13, Movable table...1
2, Bending mold...11, Heat exchange coil...1a, 2
a. Attachment...19.

Claims (1)

[Scope of utility model registration request] A heat exchanger comprising a fixed table, a movable table, and a bending mold, the heat exchanger coil on the fixed table being bent by the movable table along the bending radius of the bending mold to form a heat exchanger having a predetermined bend. In the exchanger forming device, an attachment having dimensions corresponding to the dimensional difference between the portions with a small number of rows is attached at a position corresponding to a coil portion with a small number of rows of heat exchange coils having different numbers of rows before and after the bending mold,
A heat exchanger forming apparatus characterized in that the heat exchange coil is bent and formed at the same time.