Patent ID: 6519967
Filing Date: 2003-02-18
Classification: F25B

Abstract:
Arrangement in a cascade refrigeration system with screw compressors having a low-temperature circuit and a high-temperature circuit connected with each other thermally via a heat exchanger wherein the refrigerant of the low-temperature circuit is condensed in said heat exchanger, and the refrigerant of the high-temperature circuit is expanded in said heat exchanger, wherein in addition to a cascade condenser (5) a desuperheater (8) is arranged in flow direction ahead of said cascade condenser on the fluid side of the low-temperature refrigerant with the desuperheater (8) connected via lines with the high-temperature circuit in such a manner that a line via a control element (9) leads to the desuperheater (8), which via a further line (11) is connected to an economizer opening (12) on the high-temperature screw compressor (3).