OIL THROW AND WEAR REDUCTION IN A DEEP FREEZER COMPRESSOR

The design methodologies for reducing operational problems in a hermet ically sealed single-cylinder R-12 compressor used in deep freezers ar e discussed. Excessive oil throw was reduced to acceptable limits by m odifying the suction pipe location in the shell, intake muffler orient ation, oil hole dimensions and improved cooling of shell exterior. For eliminating connecting rod end wear, bronze sleeves were introduced i n the bearing along with changes in journal hardness. Accelerated life tests were conducted on modified and production compressors to demons trate the effectiveness of the modifications.