Noise killing system of fans

Details Noise killing system of fans Noise killing system of fans

1996-02-06

1998-08-11

Kwon, John T.

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

126247, F04D 2966

Patent

active

057918694

ABSTRACT:
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.

REFERENCES:
patent: 5082421 (1992-01-01), Acton et al.
patent: 5141391 (1992-08-01), Acton et al.
patent: 5343713 (1994-09-01), Okabe et al.
patent: 5391053 (1995-02-01), Pla et al.
patent: 5415522 (1995-05-01), Pla et al.
patent: 5423658 (1995-06-01), Pla et al.
patent: 5558298 (1996-09-01), Pla et al.

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