Noise killing system of fans
First Claim
Patent Images
1. A fan blade including a blade body and a noise killing apparatus mounted on the blade body at a predetermined position thereon;
- the noise-killing apparatus comprising a micro-electro mechanical system including a thin silicon film chip disposed at the position and forming;
an integrated circuit, and an actuator disposed at the position and operated by the circuit for generating vibrations offsetting unstable air flow modes produced along the blade body.
1 Assignment
0 Petitions
Accused Products
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.
28 Citations
4 Claims
-
1. A fan blade including a blade body and a noise killing apparatus mounted on the blade body at a predetermined position thereon;
- the noise-killing apparatus comprising a micro-electro mechanical system including a thin silicon film chip disposed at the position and forming;
an integrated circuit, and an actuator disposed at the position and operated by the circuit for generating vibrations offsetting unstable air flow modes produced along the blade body. - View Dependent Claims (2)
- the noise-killing apparatus comprising a micro-electro mechanical system including a thin silicon film chip disposed at the position and forming;
-
3. A fan blade including a blade body and at least one noise killing apparatus mounted on the blade body at a predetermined fixed position thereon for continuously generating vibrations of a fixed frequency to offset unstable air flow modes produced at such location.
-
4. A fan blade for a heat exchanger, the fan blade including a blade body and a micro-electrical mechanical system including a thin silicon film chip forming:
- an integrated circuit, and an actuator operated by the circuit for generating vibrations increasing unstable air flow modes produced along the blade body.
Specification