From the refrigeration principle of air conditioner, the difference when using R22,R407C,R410A and the causes of air conditioner refrigeration system malfunction are analyzed in this paper.

• 本文从空调器制冷原理出发,分析了使用R22,R407C,R410A差异及空调器制冷系统故障的原因,探讨维修方法。