Air fans operated via drive shaft by wind energy and/or solar current and/or mains electricity, comprises freewheel overrun coupling with gear changing mechanism

摘要

The air fans are operated via a drive shaft by wind energy and/or solar current and/or mains electricity in an energy-saving manner and the waste air passages are facing the lee side. A freewheel overrun coupling (9) is designed with a gear changing mechanism for matching the rotation speed to the speed of the fans. The wind wheel is combined with the coupling and the drive motors (12.1,12.2) in a motor housing. Independent claims are also included for (a) freewheel overrun coupling.