ENCLOSED TYPE ROTARY COMPRESSOR

PURPOSE:To make the miniaturization and lightweightiness of a system attainable as a whole, by housing a compressor element comprising a Rankine refrigerant cycle, a motor element driving this compressor element and an expander element all in an enclosed case, while transmitting the power of individual elements via one driving shaft alone. CONSTITUTION:A condensed liquid 3 is led into an expander element 9 by way of a liquid pipe 16 and engenders adiabatic expansion inside an expander cylinder 12 while part of the condensed liquid drives a driving shaft as being gasified and flows into a vaporizer from a low-pressure pipe 17. On the other hand, suction gas is led into a compressor element 10 thrugh a suction pipe 18 and adiabatically compressed inside a compressor cylinder 14, then once discharged to the inside of an enclosed case 7 via a discharge valve part 19, passing a motor element 11 part and flowing into a condenser from a discharge pipe 20. At this time, the power required for compression is fed from the motor elemnt 11 and the expander element 9 via a driving shaft 8.