REFRIGERATION PLANT WITH PUMP-CIRCULATION COOLING SYSTEM Russian patent published in 2006 - IPC F25B1/00 

FIELD: refrigeration or cooling, particularly compression machines, plant or systems with non-reversible cycle.

SUBSTANCE: refrigeration plant comprises two-step compressor, condenser, receiver, regulating valve, economizer, air cooler and mixing chamber. The receiver is provided with coil and may act as liquid separator, circulation, linear and drain receivers to provide dosed coolant supply into cooling system. The first compressor stage cylinders may suck coolant from receiver and feed coolant in mixing chamber. Vapor exiting from economizer is also fed into the mixing chamber. The second stage cylinders suck vapor from mixing chamber and supply vapor to condenser. Liquid coolant from condenser passes into receiver via economizer and coil and then into air cooler through regulation valve. Vapor from air cooler enters receiver.

EFFECT: reduced ammonia consumption, power inputs, costs and increased plant safety.