Patent ID: 6089033
Filing Date: 2000-07-18
Classification: F25B

Abstract:
A high-speed evaporator defrost system comprising a defrost conduit circuit having valve means for directing hot high pressure refrigerant gas from a discharge line of one or more compressors and through a refrigeration coil of an evaporator, during a defrost cycle of a refrigeration system having one or more evaporators, and directly back to a suction header of said one or more compressors through an auxiliary reservoir to remove any liquid refrigerant contained in said refrigerant gas prior to returning to said suction header, said auxiliary reservoir having a volume sufficient to take the full refrigerant load of a main reservoir of said refrigeration system, flushing means to transfer accumulated liquid refrigerant from said auxiliary reservoir to said main reservoir when said refrigeration system is in a refrigeration cycle, said auxiliary reservoir of said defrost conduit circuit having an internal pressure which is at the same pressure as that of a suction header of said one or more compressors thereby creating a pressure differential across said refrigeration coil sufficient to accelerate said hot high pressure refrigerant gas in said discharge line through said refrigeration coil of said evaporator to quickly defrost said refrigeration coil.