DUAL INDEPENDENT CHAMBER ULTRA-LOW TEMPERATURE FREEZER

摘要

The invention relates to an independently controllable dual chamber (11,12) freezer system comprising means for splitting a refrigerant stream after oil separation occurs into a first and a second low-stage circuit; means for controlling the flow of the split refrigerant stream into a cascade heat exchanger (36); means for passing the split refrigerant stream through a first and a second expansion control device (34,35) and a first and a second evaporator (31,32), respectively; means for controlling the migration of the split refrigerant stream; means for recombining the split refrigerant stream after passing through said first and said second evaporators (31,32); and means for compressing (30) the recombined refrigerant stream.