| 摘要 |
A vacuum cleaner 10 being supported on or by a plurality of driven wheels or rollers 14 characterised in that the driven wheels or rollers 14 are adapted to be driven at more than one speed in a forward direction. The wheels or rollers 14 may also be adapted to drive at more than one speed in a backward direction. Preferable each wheel or roller 14 is connected to a separate motor (15 fig 5) and the speed of each wheel or roller 14 is regulated by control software connected to the wheel or roller 14, this software may use pulse width modulation. The vacuum cleaner 10 may be autonomous and may comprise navigation and control software for navigating about a room or other space. A cyclonic separator (52 fig 1) may be included. |
