Since the accumulator is one of the largest components in R410A rotary compressors, its contribution to the total noise is substantial. Because of its importance, it deserves our attention to analyze it.In this paper, the effects of accumulator to the total noise are analyzed from two aspects of theory and experiment. The finite element method (FEM), MATLAB software and SYSNOISE software are used in analysis. The test observations for the accumulators are presented to demonstrate the contribution. Several experimental trials and analytical approaches are used to show that the dominating noises in R410A rotary compressors are the resonance noise of suction flow noise of the accumulator from 425Hz to 475Hz.Some valuable suggestions for design of the accumulator are given. Consequently, the structural modifications of the accumulator result in the reduction of noise level by approximately 14dB from 425Hz to 475Hz. And the total noise has reduced 1.5dB.
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