| 摘要 |
<p>A vacuum cleaner has an electric blower (7) inside a generally cylindrical rigid blower casing (16,17) positioned inside the vacuum cleaner body (1). The blower casing has a lining of sound absorbing material (18) and is configured to cause a swirling flow around inside said casing to an exit opening (72) into a smoothly-curved transfer passage (73) which curves away from the blower casing with a non-radial flow direction. Transfer passage (73) curves circumferentially and also axially and opens into an annular noise reduction space (19) at the bottom of the cleaner body in which air is guided over a sound absorbing layer (20) by smoothly arcuate guide ribs (61), vented through an aperture (24) into an exhaust space (30) between the bottom of the body and a castor base (4) and escapes through a peripheral clearance (76) around the castor base. <IMAGE></p> |
