Oil feedback system for compression refrigeration appts. - has regulator responsive to detected temp. difference for closure of control valve in oil feedback line to compressor

摘要

The oil feedback system has a separation device (3) for the oil and the refrigeration medium on the output side of the condenser (2) allowing the oil to be fed back to the compressor (1) via a feedback line (7, 9) incorporating a valve (4) and a temp. sensor (T1). The valve (4) is operated via a regulator (5) receiving a signal from the latter temp. sensor (T1) and a second temp. sensor (T2) on the high press side of the refrigeration circuit. The regulator (5) uses the temp. difference between the 2 temp. sensor signals, to provide a signal for closing the valve (4). ADVANTAGE - Simple, reliable feedback of lubrication oil for compressor.