Atomizer and electronic cigarette thereof

An atomizer, comprising an atomizer body, a suction nozzle assembly mounted at the top of the atomizer body, an air inlet provided in the atomizer body, an atomization sheet and a tobacco tar chamber provided in the atomizer body, and a tobacco tar guide device which guides tobacco tar in the tobacco tar chamber to an atomization surface of the atomization sheet, wherein an air outflow passage communicated with the suction nozzle assembly is provided in the atomizer body, and wherein a tobacco tar separation chamber is provided in the middle of the tobacco tar chamber, and an accommodating chamber is provided in the tobacco tar separation chamber;

• wherein the air outflow passage comprises an air duct arranged in the accommodating chamber, a first gap is reserved between the outer wall of the air duct and an inner wall of the accommodating chamber, and the first gap communicates with the air inlet to form a first air inflow passage;
• wherein the tobacco tar guide device comprises atomization cotton, which is fixed in the accommodating chamber, can guide the tobacco tar to the atomization sheet, the atomization cotton comprising a hollow cylinder and a bottom that abuts against the atomization surface of the atomization sheet, the hollow cylinder and the bottom defining a hollow chamber of the atomization cotton;
• and wherein a thermal insulation pipe is sleeved on the lower part of the air duct, the upper part of the air duct communicates with the suction nozzle assembly, the lower part of the air duct is inserted into the hollow chamber of the atomization cotton, a second gap is reserved between the lower end of the thermal insulation pipe and the bottom of the hollow chamber of the atomization cotton, and the second gap communicates with the first air inflow passage.