MULTI-SYSTEM PUMP-CIRCULATION REFRIGERATING PLANT Russian patent published in 2007 - IPC F25B1/00 

FIELD: cooling engineering.

SUBSTANCE: refrigerating plant comprises two-stage compressors, condenser, one-stage compressor, economizer, float valve, and three receivers. The third receiver is provided with a separating column. The receivers are made for permitting operating as liquid separator, circulating linear, and drain receivers, and batching the coolant charge. The two-stage compressors are made for permitting sucking the vapors of coolant from the receivers of low-temperature cooling systems and supplying them to economizers for cooling and for permitting sucking vapors from the economizers and delivering them to the condensers and, then, through the economizers, to the receivers. The vapor-liquid mixture enters the separating column of the vapor from which it is supplied to the receiver. When defreezing, the vapor-liquid mixture enters the separating column of the receiver through the float valve.

EFFECT: enhanced safety and reduced power consumption.