| 摘要 |
A refrigerating and air-conditioning apparatus 100 or 200, which includes a compressor 2, a condenser 3, an expansion device 4, and an evaporator 5, has a refrigeration cycle configured by these components being connected by a refrigerant pipe, and uses a non-azeotropic refrigerant mixture as a refrigerant circulating through the refrigeration cycle, includes operating state detection means 11 to 14 which detect a pressure of the refrigerant at the compressor 2, a temperature of the refrigerant at the compressor 2, and a rotation speed of the compressor 2, output detection means 15 which detects an output of the compressor 2, and composition detection means 20 which calculates a correlation between the pressure of the refrigerant at the compressor, the temperature of the refrigerant at the compressor, the rotation speed of the compressor 2, the output of the compressor 2, and a refrigerant composition and retains data indicating the correlation. The composition detection means 20 calculates a composition of the refrigerant circulating through the refrigeration cycle, on the basis of detection results of the operating state detection means 11 to 14, a detection result 15 of the output detection means, and the data indicating the correlation. |
