JPS62218691A - Blower - Google Patents

Abstract

PURPOSE:To improve vertical suction distribution by swirl control while increasing wind amount by providing a swirl controlling means capable of passing the swirl on a plane, opposed to a through fan, of a casing partitioning the through fan into the intake and jet sides. CONSTITUTION:A first rigid swirl 5 produced in a certain position has a swirl region from the center position O to the body surfaces 7b of a front casing 7 while the highest circulation speed position 5a is on a circle passing through tips of small projections 7a... provided on a plane opposed to a through fan 1 to form a small swirl and reduce the speed. The decelerated flow of the second rigid swirl 6 reaches a region opposed to the lower portion of a heat exchanger 3 to reduce the intake speed. And the circulation of the second rigid swirl 6 is absorbed and annihilated in the highest flow speed section 5a of the first rigid swirl 5 has the swirl 6 reaches the opposite side of the front casing 7 to provide a longitudinally long elliptic swirl region. Thus, effective flow path in an impeller 1 becomes better than the conventional one and further intake from above the heat exchanger 3 is intensified so that the vertical intake distribution is improved while wind amount can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air blower, and particularly to a quality flow fan structure suitable for improving the distribution on the passing air side through vortex control and increasing the air volume.

[Conventional technology]

The conventional blower device is disclosed in Japanese Patent Application Laid-Open No. 60-23734 (No. 4 of this application).
As in the air conditioner shown in the figure, a rigid groove A is created in the cross-flow fan 1 near the front casing 2, and a flow (free vortex e-f ), in the heat exchanger 3 disposed on the suction side, the wind speed is higher near the front casing 2, that is, lower.

[Problem that the invention seeks to solve]

The above-mentioned prior art does not consider the form of the rigid groove, which is determined by the position and shape of the front casing. That is,
The position with radius 13 from ○ to the vortex center to the front casing 2 is the rigid groove region, and since the flow velocity is the fastest at the position of radius 13, the suction is strong in a part of the suction side.

An object of the present invention is to improve the passing wind velocity distribution on the suction side and simultaneously increase the air volume by controlling the shape of the rigid groove.

[Means for solving problems]

The above purpose is to
By providing a vortex control means such as a large number of small protrusions or porous material that are not continuous in the axial direction and are large enough to temporarily soften the circulation of the rigid groove that occurs in the surface part,
achieved.

[Effect]

In other words, the vortex control means creates a layer of slow air flow near the front casing, slows down the suction flow speed near the front casing on the suction side, and as a result, the rigid vortices with similar flow speeds rotate and move to the opposite side. It is absorbed and disappears at the maximum velocity point of the fast-flowing rigid body vortex.

As a result, suction on the suction side away from the front casing becomes stronger and faster than before.

Therefore, the overall passing speed on the suction side can be made uniform, and the maximum flow velocity point of the rigid body vortex in the impeller approaches the front casing side according to the height dimension of the overcontrol means, so that the passage of the free vortex that is originally required is reduced. It becomes wider by the size of the small protrusion and can increase the air volume.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air blower according to the present invention will be described below with reference to FIG. 1, which is a cross-sectional view of an air conditioner. 1 is a cross-flow fan, 4 is a rear casing, 5 is a first rigid vortex, 0 is a vortex center position, 5a is a maximum flow velocity position, 6 is a second rigid vortex, 7 is a front casing, C
is a suction streamline below the heat exchanger 3, d is a suction streamline above the heat exchanger 3, and 7a is a large number of small protrusions that are not continuous in the axial direction provided on the surface of the front casing 7 facing the once-through fan 1. There it is.

It is a kind of obstacle, and it can be molded and attached as an integral or separate piece from a metal plate or plastic, or it can be made of a porous open fabric 10 with good air circulation as shown in FIG.
A porous foam molded material such as urethane or urethane may be attached. In this embodiment, air is sucked in from the heat exchanger side and blown out from the air outlet 8 below the fan, and can be easily adopted as a structure for indoor units 1 to 10 such as air conditioners.

According to this embodiment, the first rigid vortex 5 that can be formed at a fixed position
The vortex region is from the center position 0 to the front casing main body surface 7b, but the maximum position of the circulation speed is on the circumference passing through the tip of the small protrusion 7a, forming a smaller vortex than in the conventional case. The speed on the outside is reduced by the small protrusion 7a. Here, the region of the main decelerating flow will be referred to as the second rigid body vortex. The deceleration flow extends from the small protrusion 78 to a region slightly above the small protrusion 78, that is, to a region opposite the lower part of the heat exchanger 3, thereby reducing the suction velocity below the heat exchanger 3. and,
The circulation of the second rigid vortex is absorbed by the maximum flow velocity portion of the first rigid vortex and disappears as it comes to the almost opposite side of the front casing 7. In other words, it becomes a vertically long circular temperature region. Therefore, the effective flow path inside the fan impeller becomes larger than before, and the suction from above the heat exchanger 3 becomes stronger, resulting in a better vertical suction velocity distribution. In addition, by providing the small protrusion 7a, I? The first rigid body vortex, which is the maximum flow velocity of the J ring vortex, is no longer in contact with the front casing main body surface 7b, and
In addition to reducing the temperature range inside the impeller as mentioned above, the discontinuously arranged small protrusions reduce noise by dispersing the wind noise of continuous blades in the axial direction. To prevent pressure leaks, air volume can be increased without increasing noise.

Further, when the heat exchanger 3 is used as a cooler, drain water accumulates on the back surface of the front casing 7.

Even when the front casing 7 is cooled by the drain water, the large number of small protrusions acts to dissipate heat, which also has the effect of reducing the generation of water droplets on the surface facing the free flow fan.

〔Effect of the invention〕

According to the present invention, since the vortex form can be controlled with a simple structure, the passing wind speed distribution on the suction side can be made uniform, and
Air volume can be increased without increasing noise.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of an air conditioner equipped with an air blower according to an embodiment of the present invention, Fig. 2 is a perspective view of the front casing which is the main part of Fig. 1, and Fig. 3 is the same as Fig. 2. Another alternative embodiment, FIG. 4, is a longitudinal sectional view of an air conditioner equipped with a conventional blower device. 1... Cross-flow fan, 4... Rear casing, 6...
Second free vortex, 7...front casing, 7a...small protrusion. 10 3rd month 1'-/fl+ 7-;n7゛

Claims (1)

[Claims] 1. An air blowing device characterized in that a vortex control means capable of causing a vortex flow is provided on a surface of a casing that partitions the suction side and the blowout side of the once-through fan, and which faces the once-through fan.