JPH05164348A - Air conditioner - Google Patents

Abstract

PURPOSE:To obtain an air conditioner in which a spacer, etc., to have to be heretofore charged in a bending heat exchanger is removed, the number of components is reduced, the number of manufacturing steps is shortened and generation of a turbulent flow at the time of air supplying can be suppressed. CONSTITUTION:An air conditioner has a bending heat exchanger 5 including a plate fin 11 and a heat exchanging pipe 9, and a cross flow fan 10 disposed behind the exchanger 5, and comprises a wedgelike cutout 14 provided on the fin 11 only at one side of a blower side. An upper heat exchanger above the cutout 14 and a lower heat exchanger below the cutout are bent in an L shape at a predetermined angle to constitute the exchanger 5, and a position of a bent part 6 of the exchanger 5 is provided near a height position at the center of a rotary shaft of the fan 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to an indoor unit of an air conditioner having an improved plate fin type bending heat exchanger.

[0002]

2. Description of the Related Art In recent years, in an indoor unit of a separation type air conditioner, it has been attempted to secure a large suction area by providing air suction ports on the front surface and the upper surface of the unit. As examples of the structure of the plate fin type heat exchanger housed in such an indoor unit, for example, Japanese Utility Model Laid-Open No. 60-118430 and Japanese Patent Laid-Open No. 3-5637 are known. The plate fin type heat exchangers described in these publications are provided with a notch on each of the surface facing the fin blower opening and the surface opposite to the surface, and based on the notch, the plate fin heat exchange is performed. The container is bent in a V shape. Then, the bent heat exchanger is housed in a unit, and the air sucked from the suction ports provided on the front surface and the upper surface of the unit is configured to flow to the heat exchanger.

[0003]

However, since the plate fin type heat exchanger of the above-mentioned prior art is bent in a dogleg shape, the bent portion is provided in a V-shaped space, that is, a fin. A cutout portion is formed. in this way,
If the V-shaped notch is formed in a part of the heat exchanger, air flows into this space more easily than other parts, and there is a problem that heat exchange is hardly performed.

For this reason, for example, Japanese Patent Laid-Open No.
In the technique described in Japanese Patent No. 5637, the V-shaped notch is closed with a spacer such as a metallic seal. However, the fins of the heat exchanger may be crushed or damaged when the spacer is stored. Furthermore, the manufacturing man-hour has increased from the past due to the increase in the number of parts. Further, on the back surface of the spacer, a negative pressure may be generated at the time of blowing air and turbulent flow may be generated. As a result, there is a problem that the air flow does not flow smoothly.

The present invention has been made in order to solve the above-mentioned problems of the prior art. It is possible to remove the spacers and the like that had to be housed in the bending heat exchanger in the past, and to reduce the number of parts. It is an object of the present invention to provide an air conditioner that can further reduce the number of manufacturing steps. Another object of the present invention is to provide an air conditioner capable of suppressing the generation of turbulence during air blowing.

[0006]

In order to achieve the above object, the structure of an air conditioner according to the present invention comprises a plate fin arranged in parallel at regular intervals and a heat exchange pipe penetrating the plate fin. And a bending heat exchanger bent in a dogleg shape at a predetermined position in the longitudinal direction of the plate fin,
In an air conditioner in which a blower located behind the bending heat exchanger is built in a housing having a suction port and a blowout port, a wedge-shaped cutout is provided only on one side of the blower side with respect to the plate fin. The upper heat exchanger above the cutout portion and the lower heat exchanger below the cutout portion are bent in a dogleg shape at a predetermined angle to form a bending heat exchanger.

That is, the shape of the notch of the fin of the heat exchanger is such that the notch is provided only on the blower side and is bent, and the upper heat exchanger and the lower heat exchanger are butted against each other. Further, the height position of the bent portion is provided near the center of the rotation axis of the blower.

[0008]

The function of the above technical means is as follows. In the present invention, by providing the notch portion for bending the heat exchanger incorporated in the indoor unit only on the blower side, the spacer and the like are conventionally incorporated, but it is possible to remove them. Further, by providing the height position of the bent portion of the heat exchanger according to the present invention in the vicinity of the center of the rotation axis of the blower, it is possible to suppress the occurrence of turbulence on the back surface of the heat exchanger due to the air blow, and to smoothly perform indoor air flow Flow improves the heat exchange performance of the heat exchanger.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 is a vertical cross-sectional view of an indoor unit of an air conditioner accommodating a plate fin type heat exchanger according to an embodiment of the present invention, and FIG. 2 is a plan view of a plate fin used in the indoor unit of FIG. 3 is an enlarged view of a main part of the plate fin of FIG. 2.

In FIG. 1, 1 is an indoor unit of a separation type air conditioner, 2 is a main body, 3 is a decorative frame to be combined with the main body 2, and the main body 2 and the decorative frame 3 form a casing. .. An air suction port 4a is formed on the front surface of the decorative frame 3, and an air suction port 4b is formed on the upper surface. Reference numeral 5 denotes a plate fin type heat exchanger bent in a substantially V shape (here, plates for holding both ends of the heat exchanger are not shown. Hereinafter, referred to as "bending heat exchanger"). Its structure will be described later. 6 is a bent portion of the heat exchanger, and 7 is a drain pan disposed below the bending heat exchanger 5.

Reference numeral 11 denotes plate fins that are arranged in parallel at regular intervals, and an airflow flows between them. Reference numeral 9 denotes a heat exchange pipe that penetrates through the plate fins 11 and has a refrigerant flowing inside thereof. Vessel is constructed.
In FIG. 1, a broken line 8 connecting the bend pipes indicates a bent portion of the heat exchange pipe 9, that is, a hairpin portion. Reference numeral 10 denotes a cross-flow fan associated with a blower disposed behind the heat exchanger 5, and the rotation of the cross-flow fan 10 causes indoor air to flow as indicated by a solid arrow. Here, the shape of the plate fins 11 in the bending heat exchanger 5 described above is as shown in FIG.

In FIG. 2, 12 is a through hole through which the heat exchange pipe 9 penetrates, and 13 is a cut-and-raised piece provided on the plate fin 11. A wedge-shaped notch 14 is formed at the rear edge of the plate fin 11 (on the side of the cross-flow fan 10 when incorporated in the main body 1). Also, the notch 14
A small circle 15 is formed at the tip of the. FIG. 3 shows an enlarged view of the relevant part.

As shown in FIG. 3, the notch 14 has a notch angle such that the upper piece 14a is perpendicular to the fin end surface and the lower piece 14b has a predetermined bending angle when the heat exchanger is bent. The notch 14 is formed as an angle. Further, the reason why the small circle 15 is provided at the tip of the notch 14 is to consider the integrity of the fin cutting die and the positional deviation when dividing the heat exchanger. By forming the notch 14 as described above, when the heat exchanger is bent, the upper fin and the lower fin are abutted with each other with a small gap, and it becomes as if it is an integral single fin.

Therefore, it is not necessary to house a spacer or the like in the notch as in the prior art. As a result, the condensed water adhering to the upper heat exchanger above the notch 14 during cooling can be reliably retained in the lower heat exchanger below the notch 14, and the condensed water does not drop elsewhere. The drain pan 7 can be processed. Next, the bending heat exchanger 5 is installed so that the height of the bent portion 6 of the bending heat exchanger 5 is near the height of the center of the rotation axis of the cross-flow fan 10. As a result, the generation of turbulence on the back surface of the heat exchanger due to the blowing of air can be suppressed, and the indoor air flows smoothly, thereby improving the heat exchange performance of the heat exchanger.

As is clear from the above description, in the bending heat exchanger of this embodiment, the spacers and the like that had to be loaded in the conventional case can be removed, and the number of parts can be reduced. Moreover, the number of manufacturing steps can be shortened. Further, since the upper heat exchanger and the lower heat exchanger are butted against each other with a small gap, the condensed water during cooling can be smoothly processed from the upper portion to the lower portion without dripping. Furthermore, it is possible to suppress the occurrence of turbulent flow when the blow-through fan blows air.

[0016]

As described in detail above, according to the present invention, it is possible to remove the spacers and the like that had to be housed in the bending heat exchanger, reduce the number of parts, and further reduce the manufacturing man-hours. It is possible to provide an air conditioner capable of shortening the air conditioner. Further, it is possible to provide an air conditioner capable of suppressing the occurrence of turbulent flow when blowing air.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an indoor unit of an air conditioner accommodating a plate fin type heat exchanger according to an embodiment of the present invention.

FIG. 2 is a plan view of plate fins used in the indoor unit of FIG.

FIG. 3 is an enlarged view of a main part of the plate fin of FIG.

[Explanation of symbols]

 3 Decorative frames 4a, 4b Air suction port 5 Bending heat exchanger 6 Bending section 7 Drain pan 9 Heat exchange pipe 10 Cross-flow fan 11 Plate fin 14 Notch 14a Upper piece 14b Lower piece 15 Small circle

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takashi Sugai 709, Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Prefecture 2 Hitachi Tochigi Electronics Co., Ltd.

Claims (4)

[Claims] 1. A bending heat exchanger comprising plate fins arranged in parallel at regular intervals and a heat exchange pipe penetrating the plate fins, and bent in a dogleg shape at a predetermined position in the longitudinal direction of the plate fins. And a blower located behind the bending heat exchanger in an enclosure having a suction port and a blowout port, wherein a wedge-shaped notch is formed on one side of the blower side with respect to the plate fin. The upper heat exchanger above the notch and the lower heat exchanger below the notch are bent in a dogleg shape at a predetermined angle to form a bent heat exchanger. Air conditioner to do. 2. The air conditioner according to claim 1, wherein the position of the bending portion of the bending heat exchanger is provided near the height position of the center of the rotation shaft of the blower. 3. The notch has a notch so that the plate fin upper piece is perpendicular to the fin end surface and the plate fin lower piece has a predetermined bending angle when the heat exchanger is bent. The air conditioner according to claim 1, wherein the air conditioner is formed. 4. The air conditioner according to claim 1, wherein the cutout portion is provided with a small circle portion at the tip of the wedge-shaped cutout portion.