ULTRA FREEZING SYSTEM BY VARIABLE LOAD

摘要

PURPOSE: An ultra freezing system by variable load is provided to perform cooling by using multi-component refrigerant capable of cooling to an ultra-low temperature and provide a non-harmful and non-combustible multi-component refrigerant fluid which do not exhaust ozone. CONSTITUTION: A freezing method includes the steps of producing a compressed variable load refrigerant mixture by compressing a variable load refrigerant including more than one components selected from a group consisting of fluorocarbon, hydroflouorocarbon and fluoroether and more than one components selected from a group consisting of fluorocarbon, hydroflouorocarbon, hydroclorofluorocarbon and fluoroether, cooling the compressed variable load refrigerant mixture for producing a cooled and compressed variable load refrigerant mixture, expanding and freezing the cooled and compressed variable load refrigerant mixture for producing a variable load refrigerant mixture of a lower temperature, and heating the variable load refrigerant mixture of a lower temperature.