JPH0875239A - Air conditioner indoor unit - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the rigidity of the indoor unit cabinet of a ceiling-embedded air conditioner and to rectify the internal wind. A motor 3 and a heat exchanger 2 are attached to a dome-shaped cabinet 1 integrally formed, and a fan 4 is attached to a shaft end portion of the motor 3. Further, a panel 6 is attached to the lower surface of the cabinet 1. And
An indoor unit is constituted by these, and this indoor unit is suspended from the ceiling surface using bolts. [Effect] By distributing and supporting the load of the internal components of the indoor unit of the air conditioner, it is possible to reduce the thickness and weight by improving the rigidity and reduce the noise by rectifying the internal wind with a simple structure. To

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner, and in particular, it is suitable for improving rigidity without requiring reinforcing ribs and bending, and is also suitable for rectifying internal wind. Indoor unit having a simple cabinet.

[0002]

2. Description of the Related Art In a conventional air conditioner indoor unit, a reinforcing rib is provided on a cabinet, and a U-bent upper plate and two side plates are fastened in a dot shape around them by screws or caulking. Further, Japanese Patent Application Laid-Open No. 4-363521 discloses an example in which the upper plate has a semi-elliptical cross-sectional shape to rectify the wind inside the unit.

[0003]

In the former case of the above-mentioned prior art, since it is a box-shaped cabinet structure constituted by a right-angled plane, it is difficult to reduce the blowing noise due to the air flow vortex generated at the corner portion, and the shape rigidity is low. Since it is close to the limit, it is difficult to further reduce the weight. On the other hand, in the latter of the prior art,
It is only an air conditioner that blows air in a single direction or two directions that the flow is rectified, and it is difficult to apply it to an air conditioner that blows in four directions. Then, a step of fastening the two side plates is required to form the box body.

The present invention solves the above-mentioned problems of the prior art. The object of the present invention is to reduce the weight of the cabinet, reduce the noise by rectifying the inside of the unit, and reduce the number of parts. To provide an indoor unit.

[0005]

[Means for Solving the Problems] In order to improve the rigidity of a cabinet without increasing the cost or adding steps, such as increasing the plate thickness or forming a reinforcing rib, the shape of the cabinet can be an indoor unit with an arbitrary cross section. The curve was convex outward, that is, a dome shape. Further, preferably, the cabinet is integrally molded. Further, as an integral molding method, any one of drawing molding of sheet metal, spinning molding, hot press molding of resin material, injection molding and foam molding in a mold is used.

[0006]

[Function] The cabinet is molded into a shape (dome shape) with a curved cross section, and the weight of the heat exchanger, motor, and fan attached to this cabinet is supported by a curved surface that is difficult to bend with respect to vertical load. By doing so, the rigidity is improved and the weight of the unit can be reduced as compared with the case of supporting it on a flat surface. Further, when the rigidity of the cabinet is improved, the vibration of the cabinet is suppressed, and the solid noise generated from the motor or the drain pump is reduced. In addition, the resistance to the wind that blows downward from the fan through the heat exchanger along the side surface of the cabinet is also ideal because the curved surface of the cabinet eliminates the stagnation of the air flow at the corners of the cabinet. Become. Thereby, the blowing noise can be reduced. Further, the shape of the cabinet of the present invention is suitable for integral molding such as drawing of a sheet metal, and therefore, when the resin is molded by hot pressing, there is an effect that the weight can be reduced. Also, if you mold the cabinet by foam molding in the mold,
A synergistic effect such as the cabinet having a heat insulating effect can be obtained.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a four-way blow-out type indoor unit of a ceiling-embedded air conditioner according to an embodiment of the present invention. As shown in the figure, in an indoor unit of an air conditioner, a motor 3 is attached to the center of a cabinet 1 with a bolt, and a fan 4 is attached to the shaft end of this motor. Therefore, the load of the motor 3 and the load of the fan 4 are applied to the bolt for mounting the motor 3. A heat exchanger 2 arranged so as to surround the fan 4 is also attached to the main body of the cabinet 1, and a water receiver 5 for accumulating condensed water condensed in the heat exchanger is provided below the heat exchanger. A panel 6 made of a decorative plate or the like is attached to the lower surface of the cabinet 1.
Then, the indoor unit configured in this manner is suspended from the ceiling by suspending metal fittings and bolts provided on the side surfaces.

In the indoor unit constructed as described above, the weight of the components is supported by the cabinet 1. In this embodiment, the cabinet 1 is integrally formed into a dome shape by drawing a sheet metal as shown in the figure. Here, the dome shape is one in which an arbitrary cross section is entirely surrounded by a curve as shown in FIG. 1 or only the upper part is shaped like a bowl as shown in FIG. 2 to facilitate installation work on the ceiling. For this purpose, the shape of the connection portion with the panel 6 is formed in a quadrangle, and the shape formed by a curve having a flat portion in a part of the cross section as shown in FIG. 3 is included. That is, the dome shape of the present invention is a shape in which the vertical load of the components is dispersed and applied to the cabinet.

In this structure, since the upper surface of the dome-shaped cabinet 1 for supporting the vertical load of the internal components of the indoor unit is a curved surface, compared with the case of receiving the load on a flat surface like the conventional box-shaped cabinet, It has a structure in which the force is dispersed and it is difficult to distort. That is, compared to a planar structure such as a box-shaped cabinet, under the same load condition, there are effects of reducing the thickness and weight of the cabinet and reducing the product weight. Furthermore, the improved rigidity also has the effect of suppressing the occurrence of vibration when the indoor unit is operated. Then, noise generated by the motor 3 or a drain pump (not shown) can be reduced. Further, the air sucked by the fan 4 flows along the inner surface of the dome-shaped cabinet 1 after passing through the heat exchanger 2 and is blown out from the lower panel 6 of the cabinet 1 in four directions. According to the shaped cabinet, it is possible to reduce the resistance to the flow of the internal wind to obtain an ideal flow, and it is possible to reduce the noise of the blowing air of the indoor unit.

FIG. 3 is a perspective view of a stepped dome-shaped cabinet 9 in which only the position where the heat exchanger 2 of the dome-shaped cabinet shown in FIG. 1 is installed is flat. According to this embodiment, the side surface of the heat exchanger 2 which is a flat surface is attached to the pressing plate 7
And, it becomes possible to stably fix it with the water receiver 6. Further, the effect of rectifying the airflow flowing inside the dome-shaped cabinet 1 is not impaired at all.

FIG. 4 shows an embodiment of a method for forming a dome-shaped cabinet. ◆ Since the dome-shaped cabinet has a shape that can be easily integrally molded, it does not require processes such as welding and assembling side parts, and has good productivity. As a processing method, drawing forming of sheet metal, spinning forming, or the like can be considered.
Further, since it has a shape close to a spherical surface, it has a higher rigidity than other shapes of the same material, and it is also possible to apply a soft-rigid material that could not be adopted until now. And if a resin material is used,
Hot press molding is also possible, which allows further weight reduction. A modification of this embodiment is shown in FIG. In FIG. 4, the space of the mold 10 is filled with a resin material having a heat insulating property, and processing such as foaming is performed. This allows
The rigidity and heat insulation of the cabinet can be obtained at the same time, and the cost can be significantly reduced.

[0012]

According to the present invention, the following effects can be obtained. ◆ (1) By molding the cabinet into a dome shape,
The vertical load of internal components can be dispersedly supported, the rigidity against the load can be improved, and the thickness and weight can be reduced.

(2) By forming the cabinet into a dome shape, the flow of the internal air flow becomes ideal, and the efficiency and noise can be improved.

(3) Since the cabinet can be constructed by a simple one part, it is possible to reduce the assembly process and reduce the cost.

(4) Since the cabinet has a shape that allows easy integral molding, it is possible to reduce the weight by hot-press molding of resin or the like.

(5) By foaming the cabinet in the mold, it is possible to add heat insulation performance to the cabinet body.

[0017]

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a dome-shaped cabinet for an indoor unit of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a perspective view of a dome-shaped cabinet for an indoor unit of an air conditioner according to an embodiment of the present invention.

FIG. 3 is a perspective view of a stepped dome-shaped cabinet in which only the arrangement portion of the heat exchanger is flat.

FIG. 4 is a diagram for explaining a method of forming a dome-shaped cabinet.

[Explanation of symbols]

1 ... Dome cabinet, 2 ... Heat exchanger,
3 ... motor, 4 ... fan, 5 ... water receiver,
6 ... Panel, 7 ... Pressing plate, 8 ... Upper dome-shaped cabinet, 9 ... Stepped dome-shaped cabinet, 10 ... Dome mold, 11 ... Resin material.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F24F 1/00 401 A

Claims (4)

[Claims] 1. An indoor unit of an air conditioner comprising a motor, a fan driven by the motor, an indoor heat exchanger surrounding the fan, and a cabinet to which the motor is attached. An indoor unit for an air conditioner, characterized in that the cabinet has a cross-sectional shape formed by a curved line protruding outside the indoor unit to improve rigidity and reduce internal ventilation resistance. 2. The indoor unit for an air conditioner according to claim 1, wherein the cabinet is integrally formed. 3. The air according to claim 2, wherein the integral molding is any one of sheet metal drawing molding, spinning molding, hot press molding of resin material, injection molding, and foam molding in a mold. Harmony machine. 4. An indoor unit of an air conditioner comprising a motor, a fan driven by the motor, an indoor heat exchanger surrounding the fan, and a cabinet to which the motor is attached. An indoor unit for an air conditioner, characterized in that at least a central portion of the cabinet is formed in a dome shape.