JP2768183B2 - Cross fin coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross fin coil used as a heat exchanger in an outdoor unit for air conditioning or the like, and more particularly to a cross fin coil having a central tube sheet.

[0002]

2. Description of the Related Art As a kind of cross fin coil used as a heat exchanger in an outdoor unit for air conditioning, there is a cross fin coil with a central tube plate. An air conditioning outdoor unit having a cross fin coil with a central tube sheet is proposed in, for example, Japanese Patent Application No. 2-40600. This is shown in FIG.

The cross fin coil 50 is formed by superposing a plurality of strip-shaped fins 51 at predetermined intervals.
A large number of tubes are inserted in this at right angles. In the case with the central tube sheet, two tube sheets 53, 53 are usually interposed between the fins in the intermediate portion in the fin overlapping direction at a predetermined interval. Tube sheets 53, 53 are fans 60
It is used as a mounting base for a motor 70 for driving the motor.

Conventionally, such a cross fin coil with a central tube sheet has been assembled by a method as shown in FIG.

[0005] Fins 51 in which a large number of through holes 51a are arranged in the longitudinal direction are continuously manufactured. Fins 51 to be manufactured
Are sequentially stacked while passing through two long temporary insertion rods 40, 40 through the through holes 51a, 51a at both ends. When assembling a cross fin coil with a central tubesheet, the superposed fins 51 are completely divided into three groups. In this division, the fins 51 are divided into three groups, each of which has a new temporary insertion rod 80,
After passing through 80, the temporary insertion rods 40, 40 are pulled out. The tube sheets 53, 53 are inserted between the fin groups completely divided into three in this way, and the fin groups are overlapped. The fin group is completely divided by the long temporary insertion rods 40, 40.
This is because the tube sheets 53, 53 cannot be inserted if the remains.

[0006]

In a conventional cross fin with a central tube sheet, it is necessary to replace a temporary insertion rod at the time of assembling as described above. This is to prevent the fins from being separated when the fin group is divided, but this operation is very troublesome, and causes an increase in the manufacturing cost of this type of cross fin coil.

An object of the present invention is to provide a cross-fin coil which is easy to assemble and does not require replacement of a temporary insertion rod when inserting a tube sheet.

[0008]

A cross fin coil according to the present invention is formed by stacking a plurality of fins each having a strip shape and having a large number of through holes arranged in the longitudinal direction at predetermined intervals,
A tube is inserted into the corresponding through-holes of a number of fins, and a cross-fin coil with a central tube sheet in which a tube sheet is interposed between fins in the middle in the polymerization direction.
Notches are provided at both ends in the longitudinal direction of the tube sheet, corresponding to the through holes at both ends of the fin and opened to one end side in the width direction.

[0009] Preferably, both end portions of the tube sheet protrude outside the both side edges of the fin, and a second cut which is shallower than the protruding height is provided in at least one side edge portion of the tube sheet.

[0010]

Since the tube sheet has cutouts at both ends corresponding to the through holes at both ends of the fin and opened at one end in the width direction, a temporary insertion rod passing through the through holes at both ends of the fin can be avoided. The tube sheet can be inserted between the fins with the insertion rod passed through.

The second cut prevents the displacement of the tube sheet when the claws of the automatic hand are fitted and the tube sheet is handed from both sides with the tube sheet being vertical.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a cross fin coil showing one embodiment of the present invention, and FIG. 2 is a plan view of a tube sheet.

As shown in FIG. 1, the present cross fin coil has a large number of strip-shaped fins 10 superposed at predetermined intervals in the thickness direction. A number of tubes 20 penetrate the fin 10 in a right angle direction. Tube 2
0 is a U-tube having two tubes connected at one end, and a fin 1
The fin 10 is pressed into a large number of staggered through holes 11 from one end to the other end of the fin 10.

Two tube sheets 30, 30 are provided in two stages at an intermediate portion in the fin overlapping direction. The tube sheet 30 is shown in FIG.
As shown in the figure, the fin 10 is a strip having a width slightly larger than that of the fin 10 and is interposed between the adjacent fins 10 with a space therebetween, and both side edges protrude outside the both side edges of the fin 10. A pair of ribs 31, 31 rising at right angles is provided on both side edges of the tube sheet 30. A plurality of through holes 33 corresponding to the through holes 11 of the fin 10 are provided in the flat plate portion 32 sandwiched between the ribs 31. Tube 20
Are pressed into the through holes 33 to hold the tube sheet 30.

A pair of cutouts 34, 34 are provided at both ends in the longitudinal direction of the tube sheet 30. Notch 34,3
Numeral 4 is formed by removing the corners of the tube sheet 30 at right angles, and is open to one end in the width direction and both ends in the longitudinal direction of the tube sheet 30. The notches 34 correspond to one or two through-holes 11 provided at one end in the width direction at both ends in the longitudinal direction of the fin 10, and are temporarily inserted into the through-holes 11. Avoid sticks.

A second notch 35 is provided at one side edge of the tube sheet 30 near the one notch 34. The depth of the notch 35 is shallower than the protruding height of the tube sheet 30 on both sides.

The present cross fin coil is assembled, for example, by the method shown in FIG.

The fins 10 to be continuously manufactured are skewered on two temporary insertion rods 40, 40 and stacked. The temporary insertion rod 40 is passed through the through holes 11 at both ends corresponding to the notches 34, 34 of the tube sheet 30. When a predetermined number of the fins 10 are stacked, the fins 10 are laid on the side, and a gap is created at a place where the tube sheets 30, 30 are to be inserted. And the tube sheet 3 in the gap
Insert 0,30.

The tube sheet 30 has notches 34, 34 at both ends to avoid the temporary insertion rods 40, 40.
4, 4 open to one end of the tube sheet 30 in the width direction, so that the temporary insertion rods 40, 40 can be inserted into the gap despite the presence of the temporary insertion rods 40, 40 at both ends of the gap. In other words, the fin 1
The tube sheets 30, 30 can be inserted without completely dividing 0 into three groups.

When the tubesheets 30, 30 are inserted, the fins 1
The fin 10 and the tube sheets 30, 30 are fixed to the tube 20 by inserting the tube 20 through the through hole 11 of the first tube and the through holes 33 of the tube sheets 30, 30 to form a cross fin coil. .

The manufactured cross fin coil is bent as necessary (see FIG. 6). In addition, although it is transported in the factory, it is difficult to lift and transport the conventional cross fin coil because it is difficult to clamp it by an automatic hand. However, this cross fin coil is not
Are provided with the second notches 35, 35, as shown in FIG. 4 and FIG.
0 enables reliable holding and accurate positioning. Therefore, the lifting conveyance by the automatic hand 90 becomes possible. Further, both side edges of the tube sheets 30, 30 protrude outside the both sides of the fin 10, and the notches 3
Since the depths of the tubes 5 and 35 are small, there is no possibility that the fins 10 will be crushed even if the tube sheets 30 and 30 are clamped from both sides.

[0022]

As is clear from the above description, the cross fin coil of the present invention has notches at both ends of the tube sheet to avoid the temporary insertion rods, so that the provisional insertion is made when the tube sheet is inserted. There is no need to replace bars. Therefore, the assembly becomes very simple, and a reduction in manufacturing cost is achieved.

When both end edges of the tube sheet are projected outside both side edges of the fin, and a second notch shallower than the projecting height is provided on at least one side edge of the tube sheet, the notch is provided. By fitting the claws of the automatic hand to the fins, the cross fin coils can be reliably gripped without crushing the fins, and the transfer of the cross fin coils becomes easy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cross fin coil showing one embodiment of the present invention.

FIG. 2 is a plan view of a tube sheet.

FIG. 3 is a perspective view showing a method of assembling the cross fin coil.

FIG. 4 is a perspective view showing a method for handling a cross fin coil.

FIG. 5 is a side view showing a method for handling a cross fin coil.

FIG. 6 is a partially cutaway perspective view showing an outdoor unit for air conditioning provided with a cross fin coil having a central tube sheet.

FIG. 7 is a perspective view illustrating a method of assembling a conventional cross fin coil.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Fin 11 Through hole 20 Tube 30 Tube plate 33 Through hole 34 Notch 35 Second notch 40, 80 Temporary insertion rod

Claims (2)

(57) [Claims] 1. A large number of fins (10) each having a strip shape and having a large number of through holes (11) arranged in the longitudinal direction are polymerized at predetermined intervals, and a phase of the plurality of fins (10) is formed. Corresponding through hole (1
In a cross-fin coil with a central tube sheet, in which a tube (20) is inserted into 1) and a tube sheet (30) is interposed between fins in the middle part in the polymerization direction, the tube sheet (30) A cross fin coil comprising cutouts (34, 34) provided at both ends in the longitudinal direction corresponding to the through holes (11) at both ends of the fin and open to one end in the width direction. 2. Both end edges of the tube sheet (30) are projected outside both side edges of the fin (11), and a second cut (35) shallower than the projecting height is formed at least in the tube sheet (30). The cross fin coil according to claim 1, wherein the cross fin coil is provided on one side edge.