| 摘要 |
A ventilation unit (1) comprise : a rotary member (11) equipped with a hub (13) and a plurality of blades (12) connected to the hub (13), and a closed, or sealed, electric motor (4) housed at least partly in the hub (13) and designated to drive the rotary member (11); between the hub and the motor in the ventilation unit there is an air space forming part of fluid dynamic circuit for a flow (F1) for cooling the motor. |
