NOISE REDUCTION OF ROLLING PISTON TYPE ROTARY COMPRESSOR FOR HOUSEHOLD REFRIGERATOR AND FREEZER

摘要

The noise of a small rolling piston type rotary compressor (horizontally installed) for household refrigerator and other appliances may result from mechanical vibration, parts impact, gas pulsation and the electromagnetic force of the motor. The noise can be reduced by well-designed structure suitable for vibration isolation and sound suppression. 8 dB(A) noise reduction of the compressor was achieved by the application of vibration and sound proof structure, that were gained through examination for reducing the sound radiation from the shell in the relatively high frequency ranges brought by several causes of mechanical vibration, parts impact, gas pulsation and other excitations, and also through the investigation into the cause of noise generation in the relatively low frequency langes due to motor electromagnetic force and gas pulsation.