Burns, Doane, Swecker & Mathis, L.L.P.
Noise killing system of fans
 Mounted on the body of a fan blade is a micro-electro mechanical system which includes at least one thin silicon film forming an integrated circuit, and an actuator connected to the circuit for generating vibrations. If used as a noise-killing system, the actuator generates vibrations which offset (reduce) unstable air flows along the blade body. If used in a heat exchanger to improve the heat exchange effect, the system generates vibrations which amplify the unstable air flow, e.g., to amplify turbulence and vortexes. 
Samsung Electronics Co., Ltd.
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F04D F04D
inventional inventional
Seungbae
Lee