Comprehensive Governing to Reduce the Vibration and Noise of Cooling Machine in the Limited Space

The sound absorption structure was designed by the results of noise test in a supermarket refrigeration machine room. And determine the rate of perforation, the thickness of the absorber and the orifice diameter from the wide-band noise characteristics of the limited space. Reducing the reverberation value of the space .In order to reduce the effects of vibration, modeling the double sources exciting and double output double-deck vibration isolation system with intermediate mass weight .Calculate the foundation speed amplitude, which method determine the isolation parameters which effects the isolation effect. In the final noise test, the noise of refrigeration room has been reduced from 68.3 dB(A) to 63.2 dB(A) and the vibration floor has been significantly reduced which has got a good vibration and noise reduction effect.