Air filtering device and air sealing mechanisms thereof

The invention provides an air filtering device and air sealing mechanisms thereof. The air filtering device comprises an absorbing chamber, a desorbing chamber, an air inlet channel, an air exhausting channel, a filtering part and two air sealing mechanisms, wherein the absorbing chamber and the desorbing chamber are communicated with each other through at least two communication ports; the air inlet channel and the air exhausting channel are communicated with the absorbing chamber; the two air sealing mechanisms are adjacently arranged to the two communication ports; the absorbing chamber and the desorbing chamber define a circulating type action route along the communication ports together, and the circulating type action route passes through the communication ports; the filtering part is movably arranged in the circulating type action route; a part, in the absorbing chamber, of the filtering part, is provided with a fed air filtering section and an exhausted air filtering section; the fed air filtering sec