Evita 4红宝石阀的工作原理分析及维修

Analysis of the Working Principle and Maintenance of Evita 4 HPSV Valves

首先对德国Drager公司Evita4呼吸机的空氧混合器中红宝石阀(HPSV)的结构、工作原理进行了详细地介绍和分析,在此基础上,对由其引发的常见故障现象进行了阐述,并同时提供了相关故障的排查方法。通过维修实例简要叙述了红宝石阀维护保养的有关措施。

By analyzing the structure and the working principle of Evita 4 HPS valve （HPSV=high-pressure servo-valve） in the mixer unit, and introducing detailed status of troubleshooting to give the solvents. The repairing examples and some effective ways about maintenance of the HPSV are provided at Inst.[Chinese Medical Equipment Journal, 2008,29 （12） ： 98-99]