| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a non-azeotropic mixture refrigerant which can be applied to a freezer system capable of being operated at room temperature for ultra low temperature. <P>SOLUTION: This non-azeotropic refrigerant for ultra low temperature, comprising a combination of a high boiling point refrigerant capable of operating a freezer at room temperature with a low boiling point refrigerant capable of achieving a low temperature of ≤-50°C to constitute a system for operating a refrigerant condensation process to a capillary below a liquid phase line and a refrigerant evaporation process to a compressor above a gas phase line in a heat exchanger 4 for heat exchange between the refrigerant from a condenser to the capillary and the refrigerant from an evaporator to the compressor, in the freezer comprising the compressor 1, the condenser 2, the capillary (throttle) 5, and the evaporator 6, is characterized in that the amount of isobutane as the high boiling point refrigerant is 40 to 60 wt.% or 50 to 80 wt.% based on R-23 or R-116 as the low boiling point refrigerant. <P>COPYRIGHT: (C)2007,JPO&INPIT |
