Using the adsorption performance of the molecular sieve, through the physical principle, the large-displacement oil-free compressor is used as the power to separate the nitrogen and oxygen in the air, and finally obtain a high concentration of oxygen.This type of oxygen generator produces rapid oxygen production and high oxygen concentration, which is suitable for oxygen therapy and oxygen care in various populations. The power consumption is low, and the cost per hour is only one-eighth, and the price is low.