Abstract: The influences of vacuum-desorption on the performance of small-scale oxygen concentrator by pressure swing adsorption (PSA) were studied experimentally．The effects of operating parameters，such as inlet pressure of adsorber，oxygen flux，pressure equalization time on the oxygen concentration in the product were investigated in both vacuum and atmospheric environments．The results show that vacuum-desorption was helpful to increasing the oxygen concentration and decreasing the start-up time. Less effects were produced by inlet pressure，oxygen flux and pressure equalization time on the oxygen concentration in vacuum environment than in atmospheric environment，although the desorption behavior is the same in both environments.

摘要： 通过实验研究了真空环境对小型变压吸附制氧的影响，考察了真空解吸与常压解吸两种条件下，进气压力、产氧量与均压时间对氧气纯度的影响。实验结果表明：真空解吸有利于提高氧气纯度和缩短产氧启动时间；真空解吸条件下，进气压力、产氧量与均压时间的变化对氧气纯度的影响规律与常压解吸时相同，但影响程度减弱。