Air suction silencer for reciprocating piston type compressor

Abstract

The invention discloses an air suction silencer for a reciprocating piston type compressor. The air suction silencer comprises a silencing cavity, wherein an air inlet and an air outlet are formed in the silencing cavity, an inner inserting pipe with the two ends communicated with the air inlet and the air outlet correspondingly is arranged in the silencing cavity, and the silencing cavity comprises an expansion cavity and a resonant cavity which are separated; the two ends of the inner inserting pipe are arranged in the expansion cavity and the resonant cavity respectively, the first end located in the expansion cavity directly faces the air inlet or the air outlet, a distance is formed between the air inlet or the air outlet and the first end, and the resonant cavity comprises a first resonant cavity and a second resonant cavity which are separated; and a first silencing hole and a second silencing hole which are respectively communicated with the first resonant cavity and the second resonant cavity are formed in the pipe wall, positioned in the resonant cavity, of the inner inserting pipe, and the time required for airflow to flow to the first silencing hole and the second silencing hole along the inner inserting pipe is the same. According to the air suction silencer, the noise reduction capacity of the air suction silencer is improved while high air conveying efficiency is guaranteed.

Description

technical field [0001] The invention relates to the technical field of reciprocating piston compressors, in particular to a suction muffler for a reciprocating piston compressor. Background technique [0002] The suction muffler is a key component in the engineering practice of efficiency improvement and noise reduction of reciprocating piston compressors, and a key factor affecting the design of the entire refrigerant gas circuit. During the working process of the reciprocating piston compressor, the refrigerant gas enters the suction muffler through the suction pipe on the casing, and the suction muffler is provided with an inner tube for outputting the gas to the gas outlet pipe. The suction muffler should control the gas transmission noise during the gas transmission process. In order to achieve a good noise reduction effect in the existing technology, the resistance silencer is usually used. The resistant muffler has a better noise reduction effect in the middle and lo...

AI Technical Summary

Problems solved by technology

Its shortcoming is that the intubation tube of this utility model has a relatively long length, and passes through the first-stage expansion cavity, the second-level resonance cavity, the third-level resonance cavity and the fourth-level resonance cavity to reach the air outlet for multiple sound attenuation, but due to the internal The intubation tube is equipped with sound-absorbing holes on each resonance cavity, resulting in a large amount of shunt flow of refrigerant passing through each resonance cavity, resulting in large flow loss, low refrigerant gas density, low suction mass flow rate, and low compressor efficiency

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