A refrigerant compressor for compressing and discharging non-azeotropic mixed refrigerant to a condensing duct by a refrigerant compressor driving motor; A condensing duct cooling blower for discharging condensation heat to the condensing duct; A liquid receiver disposed below the condensing duct; A capillary for delivering the non-azeotropic mixed hydrocarbons to the freezing chamber and the freezing chamber in the receiver; The capillary tube is connected to a freezing chamber cooling line, An adjusting pipe provided on an outer wall of the freezing chamber connected to the freezing chamber cooling pipe; A refrigerating chamber cooling line is formed in the control line, A freezing chamber cooling duct, an adjusting duct provided on an outer wall of the freezing chamber, a refrigerating chamber cooling duct, and the capillary, Wherein the mixing ratio of the saturated hydrocarbons contained in the liquid phase and the vapor phase of the saturated hydrocarbon is changed according to the temperature of the saturated hydrocarbon which is not an azeotropic substance in the condensing duct, The present invention relates to a refrigerator using a saturated hydrocarbon non-azeotrope mixed refrigerant, which is characterized in that the composition ratio of two substances mixed in the mixed refrigerant is varied and the amount of the flowing is changed to increase the cooling efficiency.
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