US Patent 10064431 Atomizer and electronic cigarette having same

An exemplary atomizer includes a housing and a mouthpiece assembly. The housing defines a liquid chamber for storing tobacco liquid. The mouthpiece assembly is arranged at a first end of the housing. The mouthpiece assembly defines an air passage and a backflow chamber. The backflow chamber includes a closed bottom end away from the housing, and an open near end adjacent to the housing. The open end is in communication with the air passage.