Research on Application of Refrigerant R407C instead of R22 in Air-Conditioner Sets on Multiple Units

The feasibility to apply the refrigerant R407C instead of R22 in air-conditioner sets on CRH2 multiple units is discussed.The design improvement scheme and carrying out of the improvement as well as the testing are described,so as to provide basis for applying environment protection refrigerant in air-conditioning for the new generation of multiple units.