DedaKj Oxygen Concentrator Portable 1-7 L Adjustable Purity 93%

Item : Portable Oxygen concentrator 

Theory
The air is filtered into the compressor through the intake filter device and compressed into the molecular sieve tower for oxygen
and nitrogen separation.
Oxygen passes through the molecular sieve tower and enters the fine sieve tower, while nitrogen is adsorbed by molecules and
discharged into the atmosphere through the separation valve.
After the concentration of oxygen is further increased in the fine sieve tower, the flow rate is controlled by the flow control
valve, and then wetted through the humidification tank, and finally it flows through the oxygen delivery tube for the user to
replenish oxygen