Radial built-in fan has bearer plate outer region curved towards electric motor relative to inner region, fan wheel blades inclined oppositely to rotation direction from side facing motor

摘要

The device has an electric motor (5) in an installation frame (6) on the suction side and a fan wheel with radial blades (3) between a bearer plate (2) with a hub (1) and a cover plate on the motor side and spiral shaped opposite to the rotation direction. The outer bearer plate region is curved towards the motor relative to an inner region. The fan blades are inclined oppositely to the rotation direction starting from the side facing the motor.