Hydrocarbon mixed refrigerant, refrigeration / refrigeration / cooling / air conditioning system, refrigeration / refrigeration / cooling / air conditioning method, refrigeration / refrigeration / cooling / air conditioning system manufacturing method

摘要

Substitution of chlorofluorocarbon substitutes (HCFC, HFC) with natural refrigerant hydrocarbon refrigerants will enable the use of non-fluorocarbons with natural refrigerant hydrocarbon refrigerants, thereby reducing alternative chlorofluorocarbons and saving energy in refrigeration air conditioners. The hydrocarbon mixed refrigerant of the present invention contains propane, has a saturated vapor pressure of 7 ° C. of 0.3 to 1 MPa, and a saturated vapor pressure of 35 ° C. of 0.6 to 2.2 MPa. It may further contain n-butane, isobutane and ethane. The boiling point of the hydrocarbon mixed refrigerant is preferably −20 ° C. or lower.