JPH11270870A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the generation of noise caused by the turbulence of wind near a fan late, and to distribute and stabilize air flow for furthermore reducing the generation of noise. SOLUTION: In a cross flow fan 2, a plurality of blades 22 are erected in a circumference direction between fan plates 21 being erected at specific intervals, the blades are inclined at a skew angle of θ. In a scroll casing 4 of the body of an indoor machine, a equalizing plate (rib) 5 being placed in the channel of the blow-off side of air flow is provided at an angle being adjusted to the skew angle of θ of the cross flow fan 2. The angle where the equalizing plate (rib) 5 is adjusted to the skew angle of the cross flow fan 2 is set substantially perpendicular to the blade 22 of the fan being projected onto the plane, thus reducing the generation of noise caused by the turbulence of wind near the fan plate 21. Also, air flow does not collide with the equalizing plate (rib), thus further rectifying and stabilizing the air flow for further reducing the generation of noise, and hence blowing off the air flow into a room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower comprising a cross flow fan used for an air conditioner or the like.

[0002]

2. Description of the Related Art An indoor unit as an indoor unit of an air conditioner includes a heat exchanger, a fan motor, and a cross flow fan driven by the motor and returning the air heated / cooled by the heat exchanger to a room. A blower and an indoor control unit are mounted.

FIG. 2 is an exploded view of a main part of a general air conditioner indoor unit. The indoor unit is roughly divided into an indoor unit main body 1, a cross flow fan 2, and a heat exchanger 3, and a scroll casing 4 of the indoor unit main body 1 has a straightening plate (rib) vertically.
5 is provided, and the cross flow fan 2 is provided with a fan motor 6.
It is connected with. The cross flow fan 2 has a plurality of blades 22 laid in a circumferential direction in parallel with the rotation axis between fan plates 21 erected at predetermined intervals. The cross flow fan 2 is mounted on the indoor unit main body 1 by bearings 7, mounting members 8, 9, and the like.

Further, when the indoor unit is constructed by attaching the heat exchanger 3 and the cross-flow fan 2 is rotated, the indoor air sucked into the indoor unit through the suction grill passes through the heat exchanger 3 and then passes through the cross-flow fan. The air heated and cooled through the air outlet through the air outlet 2 is blown into the room. At that time, in the cross flow fan 2, since an air path is basically formed between the fan plates 21, the flow of air between the adjacent fan plates interferes with each other, and the vicinity of the fan plate 21 Wind turbulence was likely to occur, causing noise. Therefore, a flow straightening plate (rib) 5 is provided on the scroll casing 4, whereby the air flow is straightened and stabilized to reduce the generation of noise.

[0005]

However, a type in which a plurality of blades are laid in a circumferential direction in parallel with a rotation axis between fan plates erected at predetermined intervals of a cross flow fan. Then, there was a limit to reducing noise generation due to wind turbulence near the fan plate. Accordingly, an object of the present invention is to provide a blower that reduces the generation of noise due to wind turbulence near a fan plate, rectifies and stabilizes the airflow, and further reduces the generation of noise.

[0006]

According to a first aspect of the present invention, there is provided a blower having a fan plate provided at a predetermined interval between a pair of side plates.
A plurality of blades (blades) in the circumferential direction between each of the above plates
And a cross flow fan constructed by inclining vanes (blades) with a skew angle so that the direction of air flow generation deflects from the direction perpendicular to the rotation axis to one of the side plates. A flow rectifying plate (rib) is installed at an angle to the cross flow fan in the flow path on the blow-out side.

In the blower according to a second aspect of the present invention, a fan plate is erected at a predetermined interval between a pair of side plates, and a plurality of blades are installed between the respective plates in a circumferential direction. A cross-flow fan configured by inclining blades with a skew angle so that the direction of air flow generation is deflected from the direction orthogonal to the rotation axis toward one of the side plates; The angle of the rectifying plate (rib) installed at an angle to the cross flow fan in the flow path is such that the rectifying plate (rib) is perpendicular to the fan blades (blades) projected on a plane. As described above, the configuration is set in accordance with the skew angle.

[0008] Thus, the fan plate has a plurality of blades extending in the circumferential direction parallel to the rotating shaft between fan plates erected at predetermined intervals as in a conventional cross flow fan. , It is possible to reduce the generation of noise due to wind turbulence in the vicinity. In addition, the air flow is rectified by flowing the air flow smoothly along the rectifying plate (rib), compared to a case where a rectifying plate (rib) is provided vertically on the scroll casing of the conventional indoor unit main body,
As a result, the noise is further reduced and the noise is blown into the room.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A shows a cross flow fan and a flow straightening plate (rib) used in a blower of the present invention, and FIG. 1B shows a conceptual side view of the blower. Next, the present invention will be described with reference to the drawings.

In FIG. 1, the same components as those in FIG. 2 are denoted by the same reference numerals, 2 is a cross flow fan,
The cross flow fan 2 is configured such that a plurality of blades (blades) 22 are provided in the circumferential direction between fan plates 21 erected at predetermined intervals, and the blades (blades) are inclined at a skew angle θ.

Thus, the direction in which the air flow is generated is deflected from the direction perpendicular to the rotation axis to one of the side plates. The generation of noise due to wind turbulence in the vicinity of the fan plate can be reduced as compared with a structure in which a plurality of blades (blades) are provided in the circumferential direction in parallel with the rotation shaft.

A rectifying plate (rib) installed in a flow path on the side of the air flow blowing side is provided on the scroll casing 4 of the indoor unit main body.
5 is set at an angle corresponding to the skew angle θ of the cross flow fan 2. The angle at which the rectifying plate (rib) 5 matches the skew angle of the cross flow fan 2 is set to be substantially perpendicular to the fan blade 22 projected onto a plane.

The blower constructed as described above is shown in FIG.
As shown in the side view conceptual diagram of FIG. 2B, the cross flow fan 2 rotates in the direction of the arrow, and as a result, the air flow is blown out from the blades (blades) and installed on the scroll casing 4 in the rectifying plate (rib). The air flow is rectified and stabilized by 5 and the air is blown into the room with reduced generation of noise.

At this time, the rectifying plate (rib) 5 is set to be perpendicular to the fan blades (blades) 22 projected on a plane so as to match the skew angle of the cross flow fan 2. Wings (blades)
Since the air flow blown out from 22 flows in parallel along the rectifying plate (rib) 5, the rectifying plate (rib) 5 is provided vertically to the scroll casing 4 of the conventional indoor unit main body. Since the air flow does not collide with the rectifying plate (rib) 5, the air flow is further rectified and stabilized, and the noise is further reduced to be blown into the room.

[0015]

As described above, in the blower of the present invention, a plurality of blades (blades) are provided in the circumferential direction in parallel with the rotation axis between fan plates erected at predetermined intervals as in a conventional crossflow fan. The generation of noise due to wind turbulence in the vicinity of the fan plate can be reduced as compared with a case where the fan is installed. In addition, the air flow is rectified by flowing the air flow smoothly along the rectifying plate (rib), compared to a case where a rectifying plate (rib) is provided vertically on the scroll casing of the conventional indoor unit main body, As a result, the noise is further reduced and the noise is blown into the room.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a blower of the present invention.

FIG. 2 is an exploded view of a main part of an indoor unit of a general air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor unit main body 2 Cross flow fan 3 Heat exchanger 4 Scroll casing 5 Rectifier plate (rib) 6 Fan motor 7 Bearing 8, 9 Mounting member 21 Fan plate 22 Blade (blade)

Claims (2)

[Claims] 1. A fan plate is erected at a predetermined interval between a pair of side plates, and a plurality of blades (blades) are erected in a circumferential direction between the respective plates. A cross flow fan constructed by inclining vanes (blades) with a skew angle so as to be deflected to one side plate side from a direction perpendicular to the rotation axis, and a cross flow fan in a flow path on an air flow blowing side. A blower characterized by being provided with a flow straightening plate (rib) with a mark. 2. The angle of the rectifier plate (rib) with respect to the cross flow fan is set in accordance with the skew angle so that the rectifier plate (rib) is perpendicular to the fan blades (blades) projected on a plane. The blower according to claim 1, wherein: