JPH05133392A - Axial impeller - Google Patents

Abstract

PURPOSE:To get an axial impeller for materializing inexpensive and efficient load posture without impeding air blow performance. CONSTITUTION:In a axial blower where a plurality of vanes 2 are arranged around an approximately cylindrical hub part 7, and a drive is installed on suction side, the hub 8 on the side of suction is made partially small in diameter.

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 as a blower such as a separate type air conditioner from commercial use to household use, and there is a tendency for further noise reduction. Further, the shape of the impeller for realizing an efficient packing form during storage and transportation has been reviewed.

An impeller of the above-mentioned conventional axial flow fan will be described below with reference to the drawings. (Actual announcement 5
3-20002) FIGS. 3 and 4 show the structure of an impeller of a conventional axial flow fan. Reference numeral 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, the impeller 1 which generally operates as follows rotates in a predetermined direction, air flows into the impeller 1, and static pressure and dynamic pressure are generated by the action of the blade 2. It is added and discharged to the outside of the impeller 1 to test the blowing action.

As a method for storing and storing a large number of mass-produced impellers in this way, the height of the impellers is designed to be low in order to stack the impellers in the axial direction and to overlap as many as possible. As shown in FIG. 3, a plurality of cutting blowers 4 are formed on the hub portion.
To make it easy to stack.

[0006]

However, with the above-mentioned configuration, in an impeller having a high blade height, the stacking amount at the time of storage is reduced, and an efficient and inexpensive packing form cannot be obtained. .. In addition, when the hub is provided with a notch, part of the flow sucked into the impeller is discharged along the hub, but at that time, the flow is separated from the notch and the flow rate characteristics Is significantly reduced, which also causes noise.

In view of the above problems, the present invention provides an axial flow impeller for realizing an inexpensive and efficient packing form without impairing the air 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 suction side hub. The diameter is partially reduced.

[0009]

With this configuration, even if the impeller having a high impeller height has a part of the hub diameter reduced, the blow-off side hub of another impeller is aligned in the axial direction, and a large number of them are overlapped. Since more efficient packing can be realized, and since it is not necessary to cut out the hub portion, there is no separation of flow, no disturbance of flow due to separation, and no increase in blast noise.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 an embodiment of the present invention. 6 is an axial flow impeller, and 7 is a substantially cylindrical hub part having a substantially hollow interior,
8 is a part where the diameter of a part of the suction side hub portion is reduced. Reference numeral 9 is a motor which is a drive unit.

With respect to the impeller of the axial-flow blower configured as described above, its operation and packing will be described below.

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

Further, according to the packing form according to the present embodiment, the hub portion 7 of another same impeller is axially stacked at the place 8 where the suction side hub portion of the impeller has a smaller diameter, 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 portion of the suction side hub portion is rounded 11 so as to be rounded so that the collision loss when a part of the suction flow is along the hub can be softened. And helps improve flow characteristics.

As described above, according to this embodiment, in the impeller of the axial blower, a plurality of blades are arranged around the substantially cylindrical hub portion and the hub diameter on the suction side is partially reduced. As a result, it becomes possible to stack a number of different hub portions of the same impeller in the axial direction, thereby completing an efficient packing appearance. Further, since the hub is not required to have a notch, there is no turbulence due to flow separation and smooth flow can be achieved.

[0016]

As described above, in the impeller of the axial blower of the present invention, a plurality of blades are arranged around the substantially cylindrical hub portion, and the hub diameter on the suction side is partially reduced. As a result, it is possible to realize an inexpensive and efficient packing form without any hindrance to the blowing performance.

[Brief description of drawings]

FIG. 1 is a cross-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 Blades 6 Impeller of axial blower 7 Hub part 8 Suction side hub part

Claims (2)

[Claims] 1. In an axial flow fan in which a plurality of blades are arranged around a substantially cylindrical hub portion and a drive portion is installed on the suction side, a hub diameter on the suction side is partially reduced. Axial flow impeller. 2. The axial flow impeller according to claim 1, wherein each end of the suction side hub is rounded.