The invention discloses a novel
airflow preheating device, which comprises a heating
pipe and a
stream guidance
pipe, wherein the upper end of an opening at the lower end of the
stream guidance
pipe is sealed, both the upper end and the lower end of the heating pipe are opened; the
stream guidance pipe is nested in the heating pipe; a spiral stream guidance blade is arranged on the outer wall of the stream guidance pipe; an
airflow hole is formed in the wall of the lower end of the stream guidance pipe; a ventilation pipe is arranged inside the stream guidance pipe; the ventilation pipe is a hollow pipe which is provided with openings at both ends; the outer
diameter of the ventilation pipe is less than the inner
diameter of the stream guidance pipe, so that an
airflow space is formed between the outer wall of the ventilation pipe and the inner wall of the stream guidance pipe; the maximum outer
diameter of the spiral stream guidance blade on the outer wall of the stream guidance pipe is less than or equal to the inner diameter of the heating pipe; the ventilation pipe is supplied with air from lower end; an airflow enters the region between the inner wall of the stream guidance pipe and the outer wall of the ventilation pipe from the top end of the ventilation pipe, then enters a space formed between the outer wall of the stream guidance pipe and the inner wall of the heating pipe through the airflow hole in the wall of the stream guidance pipe and the airflow, guided by the spiral stream guidance blade, flows out from the top end of the stream guidance pipe from bottom to top. The airflow preheating device disclosed by the invention, by virtue of an optimized airflow passage, can avoid easy heating of the outer wall of an
electronic cigarette.