JP3186130B2 - Axial impeller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impeller of an axial blower used for an air conditioner or the like.

[0002]

2. Description of the Related Art In recent years, an impeller of an axial blower has been widely used from a commercial use to a home use as a blower such as a separate type air conditioner, and there is a tendency that lower noise is desired. In addition, the shape of the impeller for realizing an efficient packing style during storage and transportation has been reviewed.

Hereinafter, an impeller of the above-described conventional axial blower will be described with reference to the drawings. (Actual announcement 5
FIGS. 3 and 4 show the structure of an impeller of a conventional axial blower. 1 is an impeller of an axial blower, 2 is a plurality of blades, and 3 is a substantially cylindrical hub to which the blades are fixed.

In such an impeller, generally, the impeller 1 which operates as follows rotates in a predetermined direction, air flows into the impeller 1, and the static pressure and the dynamic pressure are generated by the action of the impeller 2. The added air is discharged to the outside of the impeller 1 to test the blowing operation.

[0005] As a method of storing and storing a large number of impellers mass-produced in this way, in order to stack the impellers in the axial direction and to overlap as many as possible, the height of the blades is designed to be low, or As shown in FIG.
To make it easy to stack.

[0006]

However, in the above-described configuration, the amount of overlapping at the time of storage is reduced with an impeller having a high blade height, and an efficient and inexpensive package cannot be provided. . Also, when a notch is provided in the hub portion, a part of the flow sucked into the impeller is discharged along the hub, but at this time, the flow is separated from the notch portion, and the flow rate characteristic is reduced. Is significantly reduced, which also causes noise.

The present invention has been made in view of the above problems, and provides an axial flow impeller for realizing an inexpensive and efficient package without impairing the blowing performance of the axial flow impeller.

[0008]

In order to achieve this object, an impeller of an axial blower according to the present invention has a plurality of blades arranged around a substantially cylindrical hub portion, and a hub on a suction side. The diameter is partially reduced.

[0009]

With this configuration, even if the impeller with a high blade height is partially reduced in the hub diameter, the blow-out side hub portion of another same impeller is axially aligned, and many of them are stacked. Since a more efficient package can be realized, and there is no need to cut out the hub, there is no separation of the flow, no disturbance of the flow due to the separation, and no increase in the blowing noise.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the structure of an impeller of an axial blower according to one embodiment of the present invention. 6 is an axial impeller, 7 is a substantially cylindrical hub portion having a substantially hollow interior,
Reference numeral 8 denotes a portion where the diameter of a part of the suction-side hub portion is reduced. Reference numeral 9 denotes a motor as a driving unit.

The operation and packing of the impeller of the axial blower constructed as described above will be described below.

The impeller 6 is rotated in a predetermined direction by the rotation of a motor 9 which is a driving unit provided on the suction side, and air flows into the impeller 6, and the static pressure and the dynamic pressure are actuated by the action of the impeller 2. Is added and discharged out of the impeller 6 to test the blowing action.

According to the packing according to the present embodiment, another hub 7 of the same impeller is axially stacked at a location 8 where the diameter of the suction side hub of the impeller is reduced. It will be easy to store. At this time, the inner diameter 10 of the hub portion of the impeller must be slightly larger than the outer diameter of the portion 8 where the hub portion is small.

Further, as a second embodiment, each end of the suction-side hub portion is subjected to rounding 11 so as to be rounded, thereby reducing the collision loss when a part of the suction flow is along the hub. To help improve flow characteristics.

As described above, according to this embodiment, in the impeller of the axial blower, a plurality of blades are arranged around a substantially cylindrical hub portion, and the hub diameter on the suction side is partially reduced. As a result, a number of hub portions of another same impeller can be stacked in the axial direction, and an efficient package is completed. Further, since the notch is not required in the hub portion, there is no disturbance due to the separation of the flow, and the flow can be performed smoothly.

[0016]

As described above, in the impeller of the axial blower according to the present invention, a plurality of blades are arranged around a substantially cylindrical hub portion and the hub diameter on the suction side is partially reduced. Thus, an inexpensive and efficient package can be realized without any hindrance to the blowing performance.

[Brief description of the drawings]

FIG. 1 is a sectional view of an impeller of an axial blower according to an embodiment of the present invention.

FIG. 2 is a perspective view of an impeller of a conventional axial blower.

FIG. 3 is a side sectional view of an impeller of a conventional axial blower.

[Explanation of symbols]

 2 impeller 6 impeller of axial blower 7 hub 8 suction side hub

Claims (1)

(57) [Claims] 1. An axial blower in which a plurality of blades are disposed around a substantially cylindrical hub portion and a drive portion is provided on a suction side, wherein a diameter of the suction side hub is partially reduced , Axial blast with each end of the hub being rounded
Machine impeller .