Control-information detecting apparatus for a refrigeration air-conditioner using a non-azeotrope refrigerant

A control-information detecting apparatus for a refrigeration air-conditioner using a non-azeotrope refrigerant as a refrigerant thereof;

• the air-conditioner having a refrigerating cycle composed by connecting a compressor, a condenser, a first decompressing device, and an evaporator;
• the air-conditioner further having a bypass pipe for connecting a high pressure side existing from an exit of said compressor through said first decompressing device to a low pressure side existing from said first decompressing device through an entrance of said compressor with a second decompressing device between them, and a cooling means for cooling the non-azeotrope refrigerant flowing from a high pressure side of said bypass pipe into said second decompressing device;
• said apparatus comprising:
• a first temperature detector for detecting a temperature of the refrigerant on a low pressure side at an exit of said second decompressing device,
• a pressure detector for detecting a pressure of the refrigerant on the low pressure side at the exit of the second decompressing device, and
• a composition computing unit for computing a composition of the refrigerant circulating through said refrigerating cycle on signals respectively detected by said temperature detector and said pressure detector.