Refrigerant mixtures comprising difluoromethane, pentafluoroethane, tetrafluoroethane, tetrafluoropropene and carbon dioxide, and uses thereof

摘要

In the present invention, a refrigerant composition is disclosed. The composition comprises HFC-32, HFC-125, HFO-1234yf, HFC-134a, and CO2. The present refrigerant compositions are useful in processes to produce cooling and heating, in methods that replace refrigerant 410A or R-22, and in cooling, air conditioning, or heat pump systems. These inventive compositions are non-combustible, comparable to ± 15% of the cooling performance of R-22 and R-410A. In addition, these compositions may function as a replacement for cooling, air conditioning, or heat pump systems R-404A, R-507, R407A, R407C, and / or R-407F. The compositions described herein have unexpected flammability.