Refrigerating Control System Using Non-Azeotropic Refrigerant

A single-stage type refrigerating system using non-azeotropic refrigerant, wherein having a compressor, a condenser, an evaporator, wherein the said system exchanges heat between returned refrigerant from the evaporator, and high-pressure refrigerant toward the evaporator in a path from the condenser, wherein the said system is composed of the open degree of controllable expansion valves of the evaporator against pressure and flux of refrigerant gas, at starting up stage and/or at state of not progressing condensation of low boiling point constituent at high temperature of the interior storage room, in order to enhance cooling performance by high temperature boiling point constituent, keeping pressure according to condensation condition of high temperature boiling point constituent by the opening expansion valves of evaporator, getting lower temperature of the interior storage room according to progressing condensation of low boiling point constituent, closing the said expansion valves of evaporator one by the other adjusting pressure to meet to condensation condition of low boiling point constituent as usual operating state.