Air pumping device

An air pumping device comprising:

• a shell comprising a receiving cavity located therein, at least one air inlet hole placed at a side wall thereon, and an air outlet hole placed at a bottom plate thereon;
• an electromagnetic assembly arranged in the receiving cavity and adjacent to the at least one air inlet hole;
• a transmission device comprising a magnetic element, a swing element, a rotation shaft and a first transmission element, wherein the swing element is rotatably mounted to the rotation shaft at an end thereof away from the electromagnetic assembly, and the magnetic element is fixed at the other end of the swing element, the first transmission element is arranged between the magnetic element and the rotation shaft and located on a side face of the swing element for moving together with the swing element;
• a first air pumping module positioned on either side of the swing element, the first air pumping module comprising a piston and a cylinder, wherein the piston is mounted on the transmission element via a cardan join to move with the transmission element for reciprocating in the cylinder;
• the cylinder is arranged with a one-way inlet valve and a one-way outlet valve;
• and
• a sterilizer element arranged with an air inlet connected to the one-way outlet valve and an air outlet connected to the air outlet hole;
• wherein as the swing element swings back and forth by turning on the rotation shaft, the piston reciprocates in the cylinder for sucking external air into the cylinder via the one-way inlet valve and pump air in the cylinder out to the sterilizer element via the one-way out valve, and the filtered air will be exported through one-way outlet valve of the sterilizer element.