In this paper, the geometric theory and operating principle of synchronal rotary compressor for domestic air conditioner are studied in detail.The calculation formulas of working volume are deduced.

• 本文详细推导了同步回转式压缩机的工作容积的计算公式，全面分析了影响同步回转式压缩机的热力性能及其内部工作过程的各种因素。