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一、滚动转子式全封闭制冷压缩机的性能提高小型全封闭式滚动转子制冷压缩机在近年来发展比较迅速。这是因为它与往复活塞式制冷压缩机相比有下列一些优点:1.效率高在滚动转子式压缩机中,压缩过程和吸气过程在一转内是同时进行的。不但工作平稳,而且气体在吸气孔口和排气阀中的流速也较低,约比往复活塞式小一半。同时,由于不需要吸气阀,使吸、排气阻力损失较往复活塞式小,因而其指示效率较往复活塞式高。一般比活塞式高30～40％。此外,滚动转子式制冷压缩机的输气系数也较活塞式高。这首先是由于它
First, the rolling rotor closed refrigeration compressor performance improvement Small fully enclosed rolling rotor refrigeration compressor developed rapidly in recent years. This is because it has the following advantages over reciprocating piston refrigeration compressors: 1. High efficiency In rolling-rotor compressors, the compression process and the suction process are performed simultaneously in one revolution. Not only is the job stable, but also the flow rate of gas in the suction port and exhaust valve is also lower, about half less than the reciprocating piston. At the same time, because the suction valve is not needed, the suction and exhaust resistance loss is smaller than the reciprocating piston, so the indication efficiency is higher than the reciprocating piston. Generally higher than the piston 30 ~ 40%. In addition, the coefficient of gyration of the rotary-scroll refrigeration compressor is also higher than that of the piston. This is primarily due to it