refrigerant preferably freon to the particular evaporator 3 1 or 3 2 in operation after the evaporation the refrigerant is sucked in by a compressor 4 2 via the valves 3 11 and 3 21 and again supplied to the condenser 4 at the start of the cycle the flooded evaporator 3 1 is switched to defreeze and the flooded evaporator 3 2 to operation in the carrier gas solvent circuit the valves 3 13 3 14 are then open and the valves 3 23 and 3 24 closed the path of the nitrogen solvent mixture leads from the heat exchanger 2 where it is precooled and already freed from high boiling solvent components via the conduits 200 and 301 the condenser evaporator 3 1 the conduit 302 solvent separator 3 3 and the conduit 303 into the condenser evaporator 3 2 which is in operation and from which it emerges as two phase mixture of gaseous nitrogen and liquid solvent and passes via the conduits 304 and 305 to the solvent separator 5 in the refrigerant circuit the valves 3 11 3 21 3 22 are open and the valve 3 12 closed the flooded evaporator 3 2 is filled with refrigerant the flooded evaporator 3 1 is empty from the condenser evaporator 4 of a refrigeration machine the condenser evaporator 3 2 is supplied with liquid freon via the conduit 401 the float valve 4 1 and the conduit 402 the.