Oxygen generator uses molecular sieve pressure swing adsorption principle, takes air as raw material, and absorbs nitrogen and other gas components to improve oxygen concentration to produce oxygen-enriched air. Oxygen concentration ranges from 90% to 96% (VA/), which can provide oxygen for therapy or relieve discomfort caused by hypoxia. When the equipment works, compressed air is injected into a closed adsorption tower filled with molecular sieve, which causes the pressure in the adsorption tower to rise. With the increase of environmental pressure, the molecular sieve absorbs a large amount of nitrogen in the compressed air, while oxygen in the compressed air still exists in the form of gas and is collected through a certain pipeline. This process is often referred to as the "adsorption" process. When the nitrogen adsorbed by the molecular sieve in the container reaches the critical state of adsorption saturation, the adsorption tower is blown to reduce pressure. With the decrease of environmental pressure, the ability of molecular sieve to adsorb nitrogen decreases, and nitrogen is released back to the gas phase from the molecular sieve and discharged as waste gas. This process is often called "desorption". In order to ensure the continuous and stable output of oxygen, the oxygen generator usually adopts two (or more) molecular sieve adsorption towers, which are controlled by rotating separation valves, so that one adsorption tower is in the adsorption process while the other adsorption tower is in the desorption process, and the two work alternately to complete the continuous oxygen production process.
