| 摘要 |
<p>This invention relates to a vacuum cleaner comprising wheels (1), a core (2), a propulsion (3), and a cleaning nozzle (4) characterized in that said wheels are rotation symmetrical around their axis (1.4), preferably with a hemispherical shape (1.1), enclosing the vacuum cleaner. The propulsion motor and transmission between the core (2) and the wheels (1) makes the invention move forward as long as the torque from the centre of gravity below the rotation axis (1.4) is larger than the torque from the rolling resistance. The random movement is achieved as a result of the shape and is fully functional without mechanical steering or electronic control. When the automatic vacuum cleaner hits furniture or other objects on the floor it performs a completely elastic collision bouncing the automatic vacuum cleaner off to a new direction. The cleaning nozzle (4) is situated between said to wheels (1) and points toward the floor (or downward) due to the gravitation forces. The cleaning nozzle passes over the surface of floor (or other objects). A high speed air flow in the cleaning nozzle fluidises dust (and other particles as well), and airborne dust follow the air flow up through the vacuum duct toward the dust container. This invention further relates to a cleaning nozzle.</p> |
