HFC/POE LUBRICITY EVALUATION ON THE ROTARY COMPRESSOR IN SYSTEM OPERATION

摘要

As R22 alternative refrigerant/oils, R407C/POE(polyolester) and R410A/POE lubricating conditions on the rotary compressor journal bearings are evaluated, using electrical detection for the contact at sliding parts, in comparison with R22/MO(mineral oil) as the current refrigerant/oil. The evaluation is made with the 0.75kW class 2-cylinder rotary compressor, mounted in a split type inverter driven heat pump system, and under system operation simulating the heat pump system in actual use. The results are: The R407C/VG68POE's lubricating condition on the bearings is a little better than that for the current R22/MO's condition, the R407C/VG32POE's condition is roughly at the same level as for the current R22/MO's. The R410A/VG68POE's lubricating condition on the bearings is better than that for the current R22/MO's condition, the R410A/VG32POE's condition is roughly at the same level as for the current R22/MO's.