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Noise reduction analysis on inverter-driven two-cylinder rotary compressors.

[In Japanese. / En japonais.]

Author(s) : NONAKA R., SUDA A., MATUMOTO K.

Type of article: Article

Summary

Two-cylinder rotary compressor is dynamically well balanced because two rollers in each cylinder chamber are located on opposite sides. Thus, it helps to reduce the circumferential vibration based on the tracking torque ripple for gas compression. This concept has recently been applied to room air conditioners for the purpose of reducing unit vibration and noise. However, it consequently requires a drastic noise reduction in the compressor. The paper describes generating mechanisms of the compressor noise established by analysis using signal processing and computer-aided engineering. Concrete countermeasures are presented for the noise reduction in the two-cylinder rotary compressor. Countermeasures for resonance in cavities were achieved by reducing 630 hertz to 1 kilohertz levels, and the effect of muffler in the chamber contributed to the reduction of 3 to 6 kilohertz levels.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1994-1545
  • Languages: Japanese
  • Source: Trans. JAR - vol. 10 - n. 2
  • Publication date: 1993
  • Document available for consultation in the library of the IIR headquarters only.

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