| 摘要 |
The invention relates to a cleaner head for a vacuum cleaner. The cleaner head has a dirty-air inlet provided in a main suction chamber of the cleaner head, an outlet duct extending from the main suction chamber for connection to a suction source, and a rotating brush bar housed inside the main suction chamber for agitating a floor surface contacted through the dirty-air inlet. The brush bar is driven by an air-cooled motor, which is mounted inside the cleaner head with at least a section of the motor being located inside the brush bar. To cool the motor in use, an external casing of the motor is provided a plurality of air-cooling holes consisting of at least one air intake and at least one air exhaust. These cooling holes are connected -intake to exhaust -to form one or more air-cooling paths through the inside of the motor. In accordance with the invention, each air intake is connected to an upstream clean air inlet by a stationary - not rotating -intake duct, and each air exhaust is similarly connected to a downstream clean air outlet by a stationary -not rotating -exhaust duct. This avoids the problems associated with using the rotating brush bar itself as a duct for carrying cooling air to the motor. |
