A vacuum cleaner comprises a cyclonic separator (116) for separating dirt and dust from an incoming airflow. A tool (300) and a suction conduit (114) connect the tool (300) to the separator (116). The tool (300) comprises a main air inlet aperture for engaging with a surface to be cleaned and a bleed air inlet (310) for allowing air to bleed into the suction path. The bleed air inlet (310) is located such that it is separate from the main inlet. The cross-sectional area of the bleed air inlet (310) is sufficiently large that, in use, the bleed air inlet (310) admits a sufficient quantity of air to maintain adequate separation efficiency in the separator of the cleaner even when the main air inlet is fully blocked.
申请公布号
WO02067746(A1)
申请公布日期
2002.09.06
申请号
WO2002GB00609
申请日期
2002.02.12
申请人
DYSON LTD;HARRIS, DAVID, STUART;EVANS, BENJAMIN;HOWES, GORDON, JAMES
发明人
HARRIS, DAVID, STUART;EVANS, BENJAMIN;HOWES, GORDON, JAMES