Impeller structure

Details Impeller structure Impeller structure

2001-09-28

2003-05-27

Look, Edward K. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Radially extending web or end plate

C416S228000, C416S23600R

Reexamination Certificate

active

06568907

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an impeller structure, and more particularly to an impeller structure that may have a dual directional air inlet effect, and have a better air inlet and air outlet effect.
2. Description of the Related Art
A conventional blast type fan in accordance with the prior art shown in
FIG. 1
comprises a casing
90
whose eddy channel is provided with a stator
91
. An impeller
92
is pivoted on the stator
91
to rotate. The casing
90
is covered by a cover plate
93
which has an air inlet
94
. By rotation of the impeller
92
, the cool air is sucked into the air inlet
94
by the blades
95
, and is drained outward from the air outlet
96
. The conventional blast type fan only has a single air inlet
94
and a single air outlet
96
. Thus, the conventional blast type fan can drive a smaller amount of cool air only, so that the heat dissipation effect thereof is not good enough.
Another conventional blast type fan in accordance with the prior art shown in
FIG. 2
comprises a casing
80
having all air outlet
86
and having a bottom plate combined with a stator
81
and provided with an air inlet
87
. Thus, when an impeller
82
of the fan is pivoted on the stator
81
, rotation of the impeller
82
may suck the cool air from the air inlet
84
by the blades
85
, and the air inlet
87
on the bottom plate of the casing
80
may also provide an auxiliary effect to suck part of the cool air. The air may be drained outward from the air outlet
86
. The conventional blast type fan may provide an auxiliary effect to suck part of the cool air, thereby achieving the dual directional air inlet from the top and the bottom, so as to increase the heat dissipation effect. However, when the cool air is sucked from the air inlet
84
of the cover plate
83
and the air inlet
87
of the bottom plate, the cool air respectively sucked from the top and the bottom will hit each other to form a turbulent flow. Thus, the effect of heat dissipation is limited. In addition, noise will be generated during rotation.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide an impeller structure, wherein the fan may efficiently increase the air inlet amount, so that the fan may have a better heat dissipation effect.
In accordance with the present invention, there is provided an impeller structure including a hub provided with a rotation shaft that may be pivoted to rotate. The hub has a periphery provided with an annular plate connected with the hub. A plurality of blades each have one end fixed to the annular plate and connected with a top face and a bottom face of the annular plate. The blades are extended outward from the hub in a radiating manner.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.


REFERENCES:
patent: 1536306 (1925-05-01), Nusim
patent: 5605444 (1997-02-01), Paton et al.
patent: 2002/0159885 (2002-10-01), Liang et al.

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