中文摘要：

对制冷压缩机的发展进行了简单的概述，统计计算了市场上几种主要容积式压缩机的电效率，并进行了对比和分析，结果表明：涡旋压缩机的电效率基本上在0．5～0．75之间，主要集中于0．6—0．7之间；活塞压缩机的效率基本上在0．4～0．7之间，而主要集中于0．5—0．65之间；螺杆压缩机的电效率基本在0．5—0．75之间，主要集中于0．65～0．75之间；压比为2。4时压缩机电效率达到最大。为制冷压缩机的设计、校核和计算提供基础和依据，为制冷系统的性能改进提供方向。

英文摘要：

This paper has briefly summarized the development of refrigerant compressor; and accounted the statistic of the electrical effi- ciency for positive displacement refrigerant compressor. After comparing and analyzing the above data, it is shown that the electrical effi- ciency of scroll compressors basically varies from 0.5 to 0.75, with a focus on section 0.6-0.7 ; efficiency of piston compressors is basi- cally between 0.4 and 0.7, with a focus on section 0.5-0.65 ; efficiency of screw compressors is basically between 0.5 and 0.75, with a focus on section 0.65-0.75. Besides, the results show that the efficiency of compressors reaches its best when its compression ratio is be- tween 2 and 4, which provides foundation and basis for designing, checking and calculation of refrigeration compressor, and guides the performance improvements for refrigeration system.