Structure for air control valve of oxygen concentrator

A structure of air control valve for oxygen concentrator, comprising:

• a main body, having an inside hollow space, said space of said main body further divided by a plurality of separating plates into a plurality of chambers connecting to the outside, said chambers including an intake chamber, at least a main chamber and at least an expel chamber;
• at least a linkage unit, located inside said space of said main body, further comprising a spring, a linkage rod and a moveable valve, said left end of said spring being placed at the conjunction of said space and said intake chamber, said moveable valve being placed at the end surface of said main body, the center area of said moveable valve able to move to left and right, the two ends of said linkage rod connected respectively to said spring and said moveable valve, said linkage rod being suspended inside said space of said main body, the outer circumference of said linkage rod having two sealing pads for allowing said main chamber being connected to only either said intake chamber or said expel chamber at any given time;
• at least a side cover, engaged to the side of said main body, inside of said side cover forming an enclosed space to accommodate a moveable piston, said piston able to push or pull said linkage unit when moving;
• and
• at least an electromagnetic valve, engaged to the end surface of said side cover, for controlling the connection or blockage of piston channel and intake channel, said intake channel located inside the shell wall of said side cover, said intake channel being connected to said intake chamber, said piston channel being connected to said enclosed space of said side cover.