摘要 |
<p>A suction or vacuum cleaner with a motor fan and a ribbed filter bag chamber or compartment is described. The ribs (62) keep the walls of a filter bag (65) from touching the sides of the filter chamber (65), thus increasing the efficiency, measured in accordance with quality factor formulae which use filtration efficiency and suction power parameters. The bag or pouch may also include surface pleats, which also increase efficiency or effectiveness of the bag.</p> |