Refrigerating plant for heat pump, has auxiliary compressor selectively placed in active/inactive state when main compressor is in active state and bistable circuit unit placed in passing state when auxiliary compressor is in inactive state

摘要

The plant has a bistable circuit unit (81) placed between an inlet (30) and an outlet (31) of an auxiliary compressor (3), and selectively adopting passing and blocking states to respectively connect and separate the inlet and outlet. The compressor (3) is selectively placed in active or inactive state when a main compressor (2) is in active state and the unit is placed in the passing state when the compressor (3) is in inactive state.