By mean of computer simulation of thermodynamic process in the 2F4.8 compressor with R22 as refrigerant,the influence of basic valve parameters on the performance of the compressor is studied.

• 通过对2F4．8型活塞式制冷压缩机改用R22工质后热力过程的计算机模拟，获得气阀结构参数对压缩机热力性能的影响数据，并对气阀结构和排气压力过高影响压缩机启动等问题提出改进方案。