Apparatus having a refrigeration circuit

摘要

An apparatus having a refrigeration circuit using difluoromethane as refrigerant and comprising an enclosed container (2) storing a multi-staged rotary compressor (1) with a plurality of cylinders, each stage having a rotary roller (18,19) and a vane (20,21) forming a compression space inside by abutting against the roller (18,19); a condenser (37); an expansion valve (39) and a cooler (38) and further comprising an intermediate cooler (35) provided in the refrigerant flow path between said cylinders for cooling said refrigerant between said stages and an additional cooler (42) in the refrigerant flow path before said expansion valve (39) for lowering the temperature of said refrigerant.