目的:为研制变海拔工况的携运行变压吸附式(pressure swing absorption,PSA)医用制氧设备提供技术支持.方法:基于PSA制氧原理,分析海拔高度变化对PSA医用制氧设备作业能力的影响,应用变频恒压进气方法,研究海拔高度自适应PSA制氧技术,探讨应用变频器之后所带来的关键技术问题,提出相应的解决措施,并以1.2 Nm3/h箱式PSA制氧机为例进行验证.结果:应用该技术的PSA医用制氧设备在0~4451 m海拔范围内运行时其作业能力符合医用分子筛制氧机相关标准要求.结论:该技术可明显提高PSA医用制氧设备在高原地区应用的海拔高度.%Objective To provide technical support for developing portable and carrying PSA medical oxygen generators under variable altitudes. Methods Based on the operation principle of PSA technology, the effects of altitude on the performance capacity of series of PSA medical oxygen generators were analyzed. PSA oxygen generating technology was explored with an inlet system with variable frequencies and constant pressure. The problems due to the introduction of the converter were discussed during studying key technologies, and some countermeasures were put forward accordingly. Trials were executed with 1.2 Nm3/h generator taken as an example. Results The PSA medical oxygen generator developed met the requirements of corresponding standards of medical molecular sieve oxygen generator at the altitudes from 0 to 4451 m. Conclusion The PSA oxygen generator has its adaption altitude enhanced significantly.
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