Noise reduction device and method for compressor

Abstract

The invention provides a noise reduction device for a compressor. The noise reduction device comprises a sound insulation cover which is arranged in a cabin and wraps the compressor, and is characterized by further comprising a silencing box which is arranged in the cabin and used for absorbing noise and reducing vibration of a cabin wall plate and a sound absorption structure which is arranged inthe cabin and used for absorbing reflected sound waves, wherein the sound absorption structure is arranged between the silencing box and the sound insulation cover. The sound insulation cover is usedfor wrapping the compressor to prevent the noise of the compressor from spreading to the inner cavity of the cabin, the silencing box is used for absorbing the noise in the cabin space and reducing vibration of the cabin wall, and the sound absorption structure is used for absorbing the sound waves which are continuously reflected back and forth between the sound insulation cover and the silencing box, so that the noise in the cabin space is reduced, the outward propagation of the noise from the cabin is effectively reduced, and the reliability and effectiveness of noise reduction of the compressor are effectively improved. The invention further provides a noise reduction method for the compressor.

Description

technical field [0001] The invention relates to a compressor noise reduction device and method, and belongs to the technical field of compressor noise reduction. Background technique [0002] The compressor cabin of the air conditioning unit is equipped with compressors, various intake and exhaust pipelines, and control systems. The noise includes mechanical noise, aerodynamic noise, and electromagnetic noise generated by the compressor body, aerodynamic noise generated by the pipeline, and The electromagnetic noise generated by the control system, etc., in most cases of air conditioner operation, these noises, especially the compressor noise, are the main noise of the air conditioner unit. [0003] The current noise control measures for compressors and their cabins mainly include active noise reduction and passive noise reduction. Active noise reduction technology mainly refers to the optimization design of compressors and other structures inside the cabin to reduce noise. ...

AI Technical Summary

Problems solved by technology

After literature search, it was found that in the passive noise reduction technology of the compressor and its engine room, the sound insulation cover of the compressor is composed of composite sound-absorbing and sound-insulating materials, and the sound-absorbing material is glued on the wall of the engine room to block the noise from the compressor. External radiation, but there are the following problems: 1) The sound insulation cover of the compressor includes a sound absorption layer and a sound insulation layer. The sound absorption layer faces the compressor, and the sound insulation layer faces the external environment. Although it can effectively reduce the noise of the compressor body, it cannot absorb Noise generated by pipelines and control systems inside the engine room

2) On the one hand, the glued sound-absorbing material of the cabin wall panel has insufficient absorption capacity for medium and low frequency noise;

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