| 摘要 |
A bagless vacuum cleaner (10) having a chassis (12), an air blower (14) and a dust extraction and collection unit (16) is provided. The dust extraction and collection unit (16) has an easily removable inlet chamber (32) and an easily removable outlet chamber (34). The inlet chamber (32) is substantially cylindrical, and the outlet chamber (34) is disposed concentrically within the upper portion of the inlet chamber (32). Duct work (92) within the chassis (12) conducts air from the base (18) of the chassis (12) and into the inlet chamber (32) in tangential fashion, such that air swirls about the inside walls of the inlet chamber (32). Air within the inlet chamber (32) is then allowed to escape from the inlet chamber (32) into the outlet chamber (34) via a plurality of small holes (56) disposed in the side walls (54) of the outlet chamber (34). Air within the outlet chamber (34) is exhausted to the blower (14) via a top wall opening (78) in the outlet chamber (34). The outlet chamber (34) contains a vertical, cylindrical filter (76) disposed concentrically within the outlet chamber (34) and a second, planar filter (80) disposed across the top wall opening (78) of the outlet chamber (34).
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