Active noise reducing device and noise reducing method for air conditioner

Abstract

The invention discloses an active noise reducing device and an active noise reducing method for an air conditioner. The active noise reducing device comprises at least two noise acquiring devices, a master control module and a noise inverted phase signal output device, wherein the at least two noise acquiring devices are used for acquiring sound signals at different positions of an air outlet of the air conditioner; the master control module is used for analyzing the sound signals acquired by the noise acquiring devices, filtering signals which cannot be sensed by ears to obtain a noise signal, generating a control signal, and sending the control signal to the noise inverted phase signal output device; and the noise inverted phase signal output device is used for outputting a inverted phase signal to a noise source position, wherein the frequency of the inverted phase signal the same as that of the noise signal and the phase of the inverted phase signal is reversed to that of the noise signal. According to the active noise reducing device for the air conditioner disclosed by the invention, parts which generate noises are not needed to be distinguished, noises caused by all types and all possible reasons can be reduced, and the direction of the output noise inverted phase signal can be regulated at any time according to the detected noise source position, so that the problem that the direction of the noises is changed by regulation of an air feeding angle of an indoor unit and opening degree of an air deflector can be solved.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an active noise reduction device and a noise reduction method for an air conditioner. Background technique [0002] At present, the noise reduction of air conditioners mainly adopts air duct design and materials to reduce noise. However, the vibration generated during the operation of the air conditioner and the noise of the air flow cannot be avoided. Designing low-noise air ducts greatly limits the structural design of the air conditioner. , so that the product design is single and limited, and the use of noise-reducing materials requires a lot of cost and is not easy to implement. [0003] Another way is to carry out active noise control on the rotating device. The current active noise reduction scheme mainly suppresses the noise and vibration of the compressor, and the sound source is fixed. During actual operation, the air supply angle of the indoor uni...

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Problems solved by technology

[0004] In order to solve the problem that the existing air conditioner noise reduction technology is only aimed at specific noises such as compressors, but cannot solve the problem of noise generated by other sound sources that are not fixed in position, the present invention proposes an active noise reduction device and method for air conditioners. Noise reduction is aimed at the noise generated by a certain structure, combined with the characteristics of indoor unit operation, and for unfixed sound sources, the output noise anti-phase signal can be flexibly adjusted according to the noise direction

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