STRUCTURE OF CASE OF COMPRESSOR

摘要

PURPOSE: A structure of case of compressor is provided to reduce noise of the compressor transmitted to outside by increasing stiffness of the case of the compressor to raise band of resonant frequency of the case. CONSTITUTION: Heat-treated layers(13,13') are formed on an inner surface and an outer surface of a case(C) comprising an upper case and a lower case(12) joined by welding by carbonizing and nitrifying to raise band of resonant frequency of the case so that the band of resonant frequency of the case does not overlap with band of resonant frequency of the compressor to prevent amplification of vibrational noise.