· The Large-scale Oxygen Generation System is one of the medical molecular sieve oxygen generation systems, which employs advanced pressure swing adsorption (PSA) technology. It adopts a multi-channel rotary valve to control the structure of the four-layer adsorption tower. Based on the short-period cyclic adsorption process, it fully utilizes the adsorption period of each tower to improve oxygen generation efficiency and enhance stability, economy, and convenience.