Blower and method for decreasing eddy noise
AssigneeCoretronic Corporation
InventorsShang-Hsuang Wu, Jhih-Hao Chen
Life of this patent
Estimating the term…
Abstract
A blower and a method for decreasing eddy noise are provided. The blower includes a fan frame, a fan wheel, at least one induction element and a coil. The fan frame has in inlet and an outlet. The fan wheel is disposed in the fan frame and has a wheel hub and a plurality of fan blades connected to periphery of the wheel hub. The induction elements are fixed to the corresponding fan blades, the coil is disposed on the fan frame for driving the at least one induction element, such that the fan blade corresponding to the induction element swing back and forth to generate a vibration sound, and the vibration sound is counteracted with eddy noise generated when the fan wheel rotates. Moreover, the method for decreasing eddy noise is also provided.
Claims23
A blower, comprising:
- a fan frame, having an inlet and an outlet;
- a fan wheel, disposed in the fan frame, and having a wheel hub;
- a plurality of fan blades connected to a periphery of the wheel hub;
- at least one induction element, disposed with the fan blades;
- and
- a coil, disposed on the fan frame, adapted to drive the induction elements, such that the fan blades corresponding to the induction elements swing back and forth to generate a vibration sound,
- wherein a current is supplied to the coil of the fan frame to generate a magnetic field to drive at least one induction element fixed to the fan blades according to a frequency, an amplitude and a phase of an eddy noise through a control circuit, so as to drive the fan blade to swing back and forth to generate the vibration sound.
A method for decreasing eddy noise, adapted to a blower, wherein the blower comprises a fan frame and a fan wheel disposed in the fan frame, and the method for decreasing eddy noise comprising:
- obtaining a frequency, an amplitude and a phase of eddy noise corresponding to a current rotation of the fan wheel;
- and
- swinging at least one fan blade of the fan wheel of the blower back and forth to generate a vibration sound according to the frequency, the amplitude and the phase of the eddy noise, wherein the vibration sound has the same frequency as the eddy noise and the same amplitude as the eddy noise, and the vibration sound has an opposite phase of the eddy noise, such that the vibration sound and the eddy noise are counteracted to each other,
- wherein the step of swinging the at least one fan blade of the fan wheel of the blower back and forth to generate the vibration sound further comprises:
- supplying a current to a coil of the fan frame to generate a magnetic field to drive at least one induction element fixed to the fan blades according to the frequency, the amplitude and the phase of the eddy noise through a control circuit, so as to drive the fan blade to swing back and forth to generate the vibration sound.
A blower, comprising:
- a fan frame, having an inlet and an outlet;
- a fan wheel, disposed in the fan frame, and having a wheel hub and a plurality of fan blades connected to a periphery of the wheel hub;
- at least one induction element, wherein the induction elements are fixed to the corresponding fan blades;
- and
- a coil, disposed on the fan frame, configured to drive the induction elements, such that the fan blades corresponding to the induction elements swing back and forth to generate a vibration sound.
A blower, comprising:
- a fan frame, having an inlet and an outlet;
- a fan wheel, disposed in the fan frame, and having a wheel hub and a plurality of fan blades connected to a periphery of the wheel hub;
- at least one induction element, wherein the fan blades are formed with the induction elements;
- and
- a coil, disposed on the fan frame, configured to drive the induction elements, such that the fan blades corresponding to the induction elements swing back and forth to generate a vibration sound.
Dependencies are inferred from the claim text.