Recent Trends of Refrigerants for Mid-and Low-temp Equipment

Here, mid-and low-temperature equipment refers to equipment commonly called air conditioners for comfort cooling as well as refrigeration equipment for the purpose of cooling down to approximately –40℃. R22 (HCFC) refrigerant is still used in mid-and low-temperature equipment for air conditioning, as well as R410A (HFC) more recently. R22 was also used for refrigeration applications, but R404A has now come to be broadly used instead. All of these refrigerants are fluorocarbon-based chemical substances.