Bladeless fan
A bladeless fan (sometimes called an air multiplier) blows air from a ring with no external blades. Its blades are hidden in its base. The first concept was created by Toshiba in 1981.[1] Dyson claims that its bladeless fans (U.S. Patent 8,454,322) produce a more constant airflow than traditional fans.[2]
The air is drawn in by a fan in the base and then directed up into a ring. It comes out of a crack all around the ring and passes over a shape like that of an aircraft wing. Industrial designer Sir James Dyson named his fan the Air Multiplier.[3]
Dyson sued Chinese companies because they began selling bladeless fans for much less than Dyson.[4] The Chinese responded that Dyson cannot patent an invention that has already been invented, that Toshiba invented the fan in 1981 and its patent expired after 20 years.[5]
Q fan
In 2015, Panasonic announced a spherical bladeless fan.[6]
References
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- ↑ http://phys.org/news/2015-04-panasonic-spherical-air-blower.html
