Abstract: Air conditioning refrigerant substitution technology in high temperature operating areas has become a challenge for the global air conditioning industry, R290 refrigerant is one of the best choices at present, but R290 has some problems, such as performance degradation and insufficient filling capacity. Based on the mechanism analysis, an R290 large displacement single cylinder compressor suitable for high temperature condition is designed. In this compressor, suction heat isolation is adopted to minimize the performance decay, and the damper, the foundation and the balance weight are all improved to cope with the noise and vibration problem, which support the design of the upcoming compressors.

Key words: R290, High temperature condition, Single-cylinder, Noise