Patent ID: 6302665
Filing Date: 2001-10-16
Classification: F01C,F04C,F05C

Abstract:
A rotary hermetic compressor comprising a hermetic case in which a motor and a compression machine are accommodated, and hydrocarbon refrigerant being used as refrigerant to be compressed by said compression machine, said hermetic compressor including sliding portions and freezer oil for lubricating said sliding portions wherein said freezer oil is mineral oil or synthetic oil, and said sliding portions of said hermetic compressor include both a first sliding portion made of iron-based sintered material including chromium carbide, sintered SKH material or SUS material, and a second sliding portion made of sintered and tempered nickel-chromium-molybdenum cast iron material including 0.4 to 1.0 weight % of chromium and hardness of HRC45 or greater.