| 摘要 |
An air cleaner for centrifugally ejecting heavier-than-air particulate debris from an air stream. A housing encloses a fan for drawing debris-laden air into a forward portion of the housing and rotating the air so as to form a rotating flow pattern that stratifies the debris-laden air, with the heavier particles of debris in the outermost orbits of the rotating flow pattern. The thus rotating air passes through an annulus to a rear portion of the housing in which the air flow is caused to back up. As a consequence, some solid debris in the forward housing portion moves into a forward isolation region from which that debris is ejected through a forward exit orifice. Other solid debris in the rear housing portion enters a rear isolation region from which it is ejected through a rear exit orifice. The thus-cleaned air passes through an exit gap to an air outlet from which it exits the air cleaner for use. The relationship between the sizes of the front and rear housing portions, the annulus, the front and rear exit orifices, the gap, and the fan capacity controls the size and amount of solid debris ejected through the exit orifices.
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