Noise reduction air inlet bypass recirculation structure of compressor

A noise reduction gas inlet bypass recirculation structure of a compressor, comprising a gas inlet pipe and a gas inlet bypass recirculation annular sleeve, wherein the gas inlet bypass recirculation annular is fixedly sleeved over the gas inlet pipe;

• the gas inlet bypass recirculation annular sleeve comprises an inner ring and an outer ring;
• the outer ring is sleeved over the inner ring;
• a hollow annular sealed cavity is formed between the inner ring and an outer side wall of the gas inlet pipe;
• a hollow annular cavity is formed among the outer side wall of the gas inlet pipe, an outer side wall of the inner ring, and an inner side wall of the outer ring;
• a bypass gas inlet and a bypass gas outlet are formed in a side wall of the gas inlet pipe;
• both the bypass gas inlet and the bypass gas outlet are communicated to the annular cavity;
• the inner ring is located between the bypass gas inlet and the bypass gas outlet;
• the bypass gas inlet is close to a gas outlet of the gas inlet pipe;
• the bypass gas outlet is close to a gas inlet of the gas inlet pipe;
• a side wall of an end, away from the gas inlet pipe, of the inner ring is able to elastically deform;
• and the annular sealed cavity is filled with gas with a certain pressure.