September 2004

Fan Blades with Winglets for Quiet Fans

Innovative approach to noise minimization of small fans.

Modern fans operate reliably and usually behind the scenes. They are required to fulfil their job of cooling electronic components as unobtrusively and quietly as possible. At the same time, the mass production of small fans must be cost-effective. To produce a device that meets all these require-ments is not easy. Innovative solutions therefore, are required that achieve improvements in ser-vice life and performance without additional costs. A completely new approach to the reduction of noise is the aerodynamic design of the annular gap between the fan blades and the inside of the housing.