Active noise control device of gas station compressor

Abstract

The invention discloses a gas station compressor active noise control device which comprises a noise reduction cover used for covering a compressor, the noise reduction cover comprises a plurality of noise reduction plates arranged around the compressor, the inner side of each noise reduction plate is provided with a noise reduction loudspeaker, the inner side of each noise reduction plate is provided with an error microphone, and the error microphone is connected with the noise reduction loudspeaker. A mounting plate connected with the compressor is arranged at one end of the noise reduction cover, each noise reduction plate can slide back and forth relative to the mounting plate, a vent hole is formed in the middle of the mounting plate, a cooling fan is mounted at the vent hole, a control box is arranged on the mounting plate, a noise reduction circuit is arranged in the control box, and each noise reduction loudspeaker and the error microphone are electrically connected with the noise reduction circuit. Passive noise control is combined on the basis of active noise control, a good noise reduction effect on low-frequency and high-frequency noise generated by the compressor can be achieved, and the noise generated by the compressor is effectively eliminated.

Description

technical field [0001] The invention relates to the technical field of noise reduction, in particular to an active noise control device for a gas station compressor. Background technique [0002] In recent years, with the development of economy and society, industrial noise pollution has become increasingly serious. The noise problem has gradually become a hot issue in the society, and the compressor is an indispensable piece of equipment in the gas station. Due to the high noise of up to 100dB generated by the engine starting and running inside and the piston colliding with the cylinder, this noise has become a major problem that needs to be solved urgently. The high noise generated by the compressor will not only damage the physical and mental health of the gas station staff, but also greatly reduce the service life of the compressor. [0003] The existing way to solve the noise problem of the compressor in the workshop mainly adopts passive noise control (also known as ...

AI Technical Summary

Problems solved by technology

The high noise produced by the compressor will not only damage the physical and mental health of the gas station staff, but also greatly reduce the service life of the compressor

[0003] The existing way to solve the noise problem of the compressor in the workshop mainly adopts passive noise control (also known as passive noise reduction). This passive noise control method mainly uses sound-absorbing materials and artificially thickens the wall to reduce noise. Works well only for high frequency noise, it costs more to process low frequency noise, because as the frequency decreases, the wavelength becomes longer, which means that there is an impact on the thickness of the wall and the attracting material higher

Active noise control is a technology that uses electronic circuits and sound reinforcement equipment to produce a sound that is in phase opposite to the noise—anti-sound, to offset the original noise and achieve the purpose of noise reduction. It has a good noise reduction effect on low-frequency noise , but the noise produced by the compressor is not only high-frequency but also low-frequency, and neither method alone can achieve a good effect

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