| 摘要 |
An air conditioning system, including a rotary compressor, an indoor heat exchanger, an outdoor heat exchanger and a throttle mechanism. The throttle mechanism is arranged between the indoor heat exchanger and the outdoor heat exchanger, and the rotary compressor is respectively connected to the indoor heat exchanger and the outdoor heat exchanger. The throttle mechanism consists of an expansion valve and/or a capillary tube. When the expansion valve is at the maximum degree of opening, the internal minimum flow area of the expansion valve is not greater than 9 mm2, and the internal flow area of the capillary tube is not greater than 9 mm2. A hydrocarbon refrigerant and a refrigeration oil are provided within the rotary compressor, the hydrocarbon refrigerant and the refrigeration oil forming a composition. The viscosity of the composition is not greater than 1100 mm2/s at a temperature of 0 degrees Celsius and a pressure of -0.05 MPa, not greater than 4200 mm2/s at a temperature of -20 degrees Celsius and a pressure of -0.05 MPa, and not greater than 25000 mm2/s at a temperature of -50 degrees Celsius and a pressure of -0.05 MPa. Use of the described composition effectively improves the reliability of the air conditioning system. |
