Vehicle or building ventilating system driven by moving air.

摘要

A ventilating device comprises a centrifugal fan (24) and a rotor (10) capable of being rotated by moving air for driving the fan (24), the rotor (10) comprising a base plate (20) for outwardly deflecting air passing through the fan (24) and an air scoop extending upwardly from the base plate comprising two arcuate rotor blades (12) in spaced overlapping relation with their concave surfaces in opposit-on to define a sinusoidal passage between the rotor blades, and a cover plate (14) extending only over the area defined between the rotor blades. The device is primarily intended for use on vehicles including ships or for ventilating buildings or caravans.