| 摘要 |
Disclosed is a filtration assembly for use with a suction vacuum cleaning device to provide improved air flow to the motor. The filtration assembly includes a housing body for housing one or more filters; and a motor driven impeller which generates suction for drawing air and any entrained material into an inlet through the one or more filters and discharging the air through an outlet. One or more filters includes a first bag filter received by the housing body, the first bag filter including a base portion and a side portion which define a cavity for holding any material that cannot pass through the first bag filter. The side portion of the first bag filter is laterally spaced apart from a wall portion of the housing body such that a gap is formed between the side portion and the wall portion, and the side portion of the first bag filter is composed of a filtering material through which air is able to be drawn; and, wherein suction of the motor generates airflow in the gap by drawing air through the side portion of the first filter bag. The housing body includes an upper portion through which the first bag filter is received and a lower portion, wherein the side portion and base portion of the first bag filter extend down into the lower portion of the housing body wherein the gap between the wall portion of the housing body and the side portion of the first bag filter is greater at the lower portion of the housing body than the upper portion. The side portion and the wall portion diverge towards the lower portion of the housing body, the gap increasing towards the lower portion of the housing body. The housing body cross-section is substantially elliptical in shape. |
