JPH0763363A - Heat exchanger for air conditioner - Google Patents

Abstract

PURPOSE:To reduce manufacturing cost and prevent the inflow of air from a clearance of a cut edge in an inner part of a side plate produced when the side plate is bent in the shape of v. CONSTITUTION:When a side plate 30 is bent in the shape of v, a cut edge 32 is produced, and turned in an inner side of the side plate to which an overlapping unit 33 is installed so that they may be overlapped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger suitable for a wall-mounted indoor unit of a separation type air conditioner.

[0002]

2. Description of the Related Art An example of a wall-mounted indoor unit of a separation type air conditioner is shown in FIG. In FIG. 2, 1 is a main body casing, 2 is a front panel attached to the front surface of the main body casing 1, 10 is a suction grill attached to the front panel 2 so as to be openable and closable, and 3 is arranged so as to face the suction grill 10. The heat exchanger 4 is a cross-flow type fan arranged rearward of the lower part of the heat exchanger 3, 5 is an outlet formed in the lower part of the front panel 2, and 6a and 6b are arranged in the outlet 5. A horizontal flapper, 7 a vertical louver arranged at the air outlet 5, 8 a drain pan arranged under the heat exchanger 3,
Is an air filter arranged on the back surface of the suction grille 3, and 11 is an installation plate.

During operation of the air conditioner, the fan 4 rotates,
Refrigerant from an outdoor unit (not shown) circulates in the heat exchanger 3. Then, the indoor air is sucked into the main body casing 1 from the suction grille 10, dust contained therein is removed when passing through the air filter 9, and then, when the air passes through the heat exchanger 3, the refrigerant and heat are removed. It is replaced and cooled or heated, then sucked into the fan 4 and urged, and then the vertical louver 7
Further, the blowing direction is regulated by the horizontal flappers 6a and 6b, and the air is blown into the room from the blowout port 5.

As shown in FIG. 3, the heat exchanger 3 is composed of a plate fin-and-tube type heat exchanger, and has a large number of strip-shaped plate fins 3a and side plates 3b on both sides thereof.
And are arranged in parallel to each other with a small space therebetween, and ends of a large number of heat transfer tubes 3c penetrating the plate fins 3a and the side plates 3b at right angles are connected to each other by a bend pipe 3d.

The heat exchanger 3 is a plate fin.
The heat exchange area is increased without increasing the thickness, width, and height of the indoor unit by bending the 3a and the side plate 3b in the middle of the length direction in a V shape.

As shown in FIG. 2, the plate fin 3a is provided with a cutting edge 3 from the front edge and the rear edge at the bending position.
e and 3f are provided, and the wind shield 12 is fitted between the cut edges 3e that are expanded by bending the plate fins 3a, so that the room air almost exchanges heat with the bending positions of the plate fins 3a. It is preventing it from flowing without passing.

The side plate 3b, as shown in FIG.
It is divided into two parts at the bending position, and after the heat exchanger 3 is bent, the connection plate 13 is interposed in the gap between the upper side plate 3b1 and the lower side plate 3b2 so that the indoor air is prevented from flowing into the gap. To prevent.

[0008]

DISCLOSURE OF THE INVENTION The above conventional heat exchanger 3
The side plate 3b to the upper side plate 3b
1 and the lower side plate 3b2 are divided, and after the heat exchanger 3 is bent, the connecting plate 13 is interposed in the gap between the upper side plate 3b1 and the lower side plate 3b2 to connect them, so that the number of parts is reduced. Since the number of connection plates 13 increases and it takes time to connect the connection plates 13, not only the cost increases, but also if the bending angle of the heat exchanger 3 has an error, the connection plates 13 cannot be connected or a gap is formed between them. There was a risk that room air would flow in through the gap.

[0009]

The present invention has been invented to solve the above problems, and its gist is to provide a number of strip-shaped plate fins and side plates on both sides thereof in parallel. In a plate fin-and-tube heat exchanger that is arranged and has a large number of heat transfer tubes penetrating through them, the cut edge of the part that becomes the inner side when the side plate is bent in a V shape in the middle of its length direction. The heat exchanger for an air conditioner is characterized in that a lap portion overlapping with each other is provided.

[0010]

In the present invention, since the above-mentioned structure is provided, it is possible to prevent the air from flowing in from the gap of the cut edge of the inside portion when the side plate is bent in a dogleg shape.

[0011]

1 is a side view of a side plate of a heat exchanger according to the present invention. The side plate 30 is integrated and bent in a dogleg shape with the plate fins. A notch 31 is provided at the front edge of the folding position of the side plate 30, and a notch 32 is provided at the rear edge, that is, the portion that is inside when bent in a dogleg shape.

As shown in FIG. 1 (B), the cut edge 32 is provided with a wrap portion 33 which overlaps each other when the side plate 30 is bent into a dogleg shape. 34 is a hole for penetrating the heat transfer tube, and 35 is a wind shield attached to the notch 31. Other configurations are similar to those of the conventional one shown in FIGS. 2 and 3, and corresponding members are designated by the same reference numerals.

Thus, the side plates 30 are arranged on both sides of the plate fins, and after passing through the heat transfer tubes, the side plates 30 are bent into a dogleg shape together with the plate fins. Then, the wrap portions 33 provided on the cut edges 32 overlap each other, and
By 33, air is prevented from flowing through the gap of the cut edge 32.

As shown in FIG. 1 (C), the cut edge
A spine 34 may be provided on one of the 32 so that it overlaps the other cut edge 32.

[0015]

According to the present invention, since the lap portions that overlap each other are provided at the cut edges of the inner side portion when the side plate is bent in a dogleg shape, air flows in from the gap between the cut edges by the lap portions. Can be prevented. And this side plate is integrated,
Since a large number of plate fins can be bent into a dogleg shape, the number of parts is reduced and the number of assembling steps is reduced as compared with the conventional one, so that the plate can be manufactured at low cost. Further, even if there is a slight error in the bent angle of the dogleg shape, it is possible to prevent a gap from being formed between the cut edges.

[Brief description of drawings]

1 shows an example of a side plate of a heat exchanger according to the present invention, (A) is a side view, (B) is a sectional view taken along line BB of (A), and (C) is a modified example. It is a sectional view corresponding to (B).

FIG. 2 is a schematic vertical sectional view of a wall-mounted indoor unit of a conventional separation type air conditioner.

FIG. 3 is a partial perspective view of a heat exchanger of the indoor unit.

[Explanation of symbols]

 30 Side plate 32 Notch edge 33 Wrap

Claims (1)

[Claims] 1. A plate fin-and-tube heat exchanger in which a large number of strip-shaped plate fins and side plates on both sides of the plate fin are arranged in parallel, and a large number of heat transfer tubes are passed through these plate fins and tube heat exchangers. A heat exchanger for an air conditioner, characterized in that a wrap portion that overlaps each other is provided at a cut edge of a portion that becomes an inner side when bent in a dogleg shape in the middle of its length direction.