Abstract: An atomizer includes: a housing assembly, a liquid storage cavity and an air guiding channel being formed in the housing assembly; and an atomization core mounted in the housing assembly in a longitudinal direction of the atomizer. The liquid storage cavity and the atomization core are arranged in the longitudinal direction of the atomizer. A liquid guiding channel is arranged in a center of the atomization core, one end of the liquid guiding channel being in communication with the liquid storage cavity, an other end of the liquid guiding channel being closed. An outer peripheral wall of the atomization core is in communication with the air guiding channel.

Abstract: An atomization core includes: a support member having a liquid guiding channel and a liquid guiding hole, the liquid guiding channel running through two ends of the support member in an axial direction of the support member, the liquid guiding hole running through a side wall of the liquid guiding channel in a radial direction of the support member; a liquid guiding core sleeved on an outer periphery of the support member, an aerosol-forming medium in the liquid guiding channel being guidable to the liquid guiding core through the liquid guiding hole; and a heating mesh arranged on an outer periphery of the liquid guiding core for heating and atomizing the aerosol-forming medium