REFRIGERATION SYSTEM WITH PLURAL EVAPORATOR MEANS

摘要

A refrigeration system particularly adapted for supermarkets and the like employing a multiplicity of refrigerated fixtures or storage rooms operating at varying load requirements wherein centrally located compressors operate all of the evaporators which may include evaporators functioning at different temperature levels from approximately freezing to substantially below freezing. The various embodiments of the refrigeration system employ a separate compressor operating at a relatively high suction pressure which produces an intermediate refrigerant evaporation temperature far below the temperature of the condensed refrigerant in the main refrigeration system and approaching the temperatures of the evaporators of the system. In each embodiment the relatively high suction pressure and intermediate temperature developed by the separate compressor is employed for reducing the temperature of the condensed refrigerant of the main refrigeration system to that intermediate temperature before supplying same to the evaporators of the refrigerated fixtures with some of the embodiments employing direct communication between the separate compressor suction and the supply of refrigerant and others employing indirect communication by heat exchanger means. The separate compressor operates at a very efficient level and thereby increases the overall efficiency and the operational characteristics of the refrigeration system.