JPH06307380A - Crossflow type blower - Google Patents

Abstract

PURPOSE:To improve the flow rate performance by reducing the height of a stabilizer tongue part, reducing the depth of a rear guide, and reducing the distance where the two-dimensional flow is restored in the vicinity of a side wall part, and reduce the noise level by forming the flow field with less turbulence. CONSTITUTION:The tongue part of a stabilizer 4 is formed so that the height may be gradually increased up to the position where the two-dimensional property of the flow may be restored in the longitudinal direction from the side wall in the front view of a diffuser 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-flow blower type blower circuit and structure used in an air conditioner or the like.

[0002]

2. Description of the Related Art A conventional cross-flow blower air conditioner is constructed as shown in FIGS. 9 and 10 as described in Japanese Patent Laid-Open No. 4-8805. 9 and 10 are a front view and a cross-sectional view of a conventional cross-flow blower type air conditioner. An impeller unit 2 including a plurality of blades 1 is arranged, an air flow path is formed around the impeller 2 and a stabilizer 4, and a cross flow blower having a suction cover 5 and a blowout port 6 is configured. . Further, the tongue portion 4a of the stabilizer has a height of the central portion AA higher than the height of the side wall portion, and the outlet 6a.
Is larger in the central part. FIG. 11 shows a flow velocity distribution from the side wall of the blowout mainstream portion 7. From this, it can be seen that there is a gradual increase in the distance from the side wall to 100 mm, and the two-dimensional flow is broken.

[0003]

However, the cross-flow blower having the above-mentioned structure breaks the two-dimensional flow in the central portion to cause turbulence, resulting in high noise. Further, the distance from the side wall where the two-dimensional flow is recovered is long, and no significant improvement in the flow rate performance is observed.

In the present invention, attention is paid to a region where the two-dimensional flow is collapsed due to the influence of the side wall of the cross flow blower, the height of the stabilizer tongue is made lower near the side wall, and the bottom of the rear guider is made near the side wall. The object is to reduce the noise by making the distance shallower to shorten the recovery distance of the two-dimensional flow to improve the flow rate performance and to form a flow field with less turbulence.

[0005]

According to the technical means of the present invention for solving the above problems, the tongue portion of the stabilizer restores the two-dimensionality of the flow in the longitudinal direction from the side wall in the front view of the outlet. The height is gradually increased to the position where

Further, the bottom of the rear guider is formed so that the depth gradually increases from the side wall to a position where the two-dimensionality of the flow is restored in the longitudinal direction in a front view of the blowout port.

Further, the height of the tongue portion of the stabilizer is sharply lowered near the side wall portion so that the velocity of the mainstream portion is stabilized up to the portion near the side wall portion, and the bottom portion of the rear guider is sharply shallowed near the side wall portion. Form.

[0008]

The height of the tongue of the stabilizer is reduced near the side wall and the bottom of the rear guider is shallowed near the side wall to shorten the distance from the side wall where the secondary flow is recovered.
Improves flow performance. Furthermore, by maintaining the two-dimensionality of the flow up to the vicinity of the side wall, turbulence is suppressed and noise is reduced.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1, 2, and 3 are a front view, a cross-sectional view, and a perspective view of a first embodiment of the present invention.

A cross-flow fan 2, which is formed by combining a plurality of blades 1 each having a certain length in a cylindrical shape in a cylindrical shape in a rotating shaft direction, is rotatably supported and closely opposed thereto. In a cross-flow blower composed of a stabilizer 4 located and a rear guider 3 forming a flow path, the tongue of the stabilizer has a two-dimensional flow characteristic from the side wall in the longitudinal direction in a front view of the outlet (Fig. 1). The position where the
(φ86 rpm, 1250 rpm)) gradually increasing (4 → 4a). As a result, the air outlet is gradually expanded (6 → 6a).

4 and 5 are a front view and a cross-sectional view of the second embodiment of the present invention. The basic structure is the same as that of the cross-flow fan of the first embodiment, and the bottom of the rear guider 3 is at a position where the two-dimensionality of the flow is restored in the longitudinal direction from the side wall in the front view of the outlet (about 100 degrees from the side wall). : (Fan diameter 8
6, rotation speed, 1250 rpm)), the depth is gradually increased (3 → 3a). This allows
The air outlet is gradually expanded (6 → 6a).

6 and 7 are a front view and a perspective view of a third embodiment of the present invention. FIG. 8 shows the flow velocity distribution of the mainstream part of the present invention and the prior art. The basic structure is the same as that of the cross flow blowers of the first and second embodiments, and the height of the tongue portion of the stabilizer 3 is drastically lowered near the side wall portion, and the rear guider 4 is used.
Is formed so that the bottom portion thereof becomes abruptly shallow in the vicinity of the side wall portion, and the blowout port also sharply decreases (6a → 6) in the side wall portion. As a result, as shown in FIG. 11, the velocity of the mainstream portion is stabilized up to the vicinity of the side wall, and the two-dimensionality of the flow is maintained up to the vicinity of the side wall.

[0013]

The height of the tongue portion of the stabilizer is reduced near the side wall portion, and the bottom portion of the rear guider is shallowed near the side wall portion, thereby shortening the distance from the side wall where the two-dimensional flow is recovered and reducing the flow rate. Improve performance. Furthermore, by maintaining the two-dimensionality of the flow up to the vicinity of the side wall, turbulence is suppressed, noise is reduced, and static pressure characteristics are stabilized.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a perspective view of the same.

FIG. 4 is a front view of the second embodiment of the present invention.

FIG. 5 is a cross-sectional view of the same.

FIG. 6 is a front view of the third embodiment of the present invention.

FIG. 7 is a perspective view of the same.

FIG. 8: Flow velocity distribution characteristic diagram of the mainstream section

FIG. 9 is a front view of a conventional technique.

FIG. 10 is a cross-sectional view of the prior art.

FIG. 11 is a characteristic diagram of a mainstream velocity distribution of a conventional technique.

[Explanation of symbols]

 1 Blade 2 Cross Flow Fan 3 Rear Guide 4 Stabilizer 5 Suction Cover 6 Outlet 7 Mainstream

Claims (3)

[Claims] 1. A cross flow fan comprising a combination of a plurality of blades each having a fixed length arranged in a cylindrical shape in the direction of the rotation axis, a cross flow fan, and a stabilizer positioned close to and opposed to the cross flow fan. In a cross-flow fan composed of a rear guider, the tongue of the stabilizer is formed so that its height gradually increases from the side wall to the position where the two-dimensionality of the flow is restored in the longitudinal direction when the tongue of the stabilizer is viewed from the front. A cross-flow blower that has been characterized. 2. The bottom of the rear guider is formed so that the depth gradually increases from the side wall to a position where the two-dimensionality of the flow is restored in the longitudinal direction in a front view of the outlet. The cross flow blower according to claim 1. 3. The height of the tongue portion of the stabilizer is sharply lowered near the side wall portion, and the bottom portion of the rear guider is sharply shallowed near the side wall portion to stabilize the velocity of the main flow portion near the side wall portion. The cross flow blower according to claim 1 or 2, characterized in that.