Ventilation Zone Perforation Geometry for Aerosol Cooling and Mixing

The patent applies asymmetry by using non-circular perforations (oval, rectangular, or triangular cross-sections) instead of conventional circular perforations in the ventilation zone. This asymmetric geometry creates turbulent airflow patterns that significantly enhance mixing between ambient air and aerosol-forming substrate airflow, directly resolving the mixing efficiency problem while remaining manufacturable through standard perforation techniques.

The patent changes the temperature parameter by introducing a ventilation zone with non-circular perforations that allows ambient air to mix with and cool the heated aerosol-forming substrate airflow. This parameter change enables the system to maintain high heating temperatures for adequate nicotine release while simultaneously providing the necessary cooling to prevent excessive aerosol temperature, thus resolving the contradiction between nicotine delivery and aerosol cooling requirements.

The patent applies segmentation by separating the cooling function from the nicotine delivery path. The ventilation zone with non-circular perforations creates a dedicated cooling channel that allows ambient air to mix with and cool the aerosol-forming substrate airflow without significantly blocking the nicotine-containing aerosol path, thus providing effective cooling while preserving nicotine delivery unlike high filtration efficiency segments.

The patent employs asymmetry through non-circular perforations (oval, rectangular, or triangular) that create turbulent airflow and enhance mixing for improved aerosol generation. These geometric shapes can be manufactured with standard tolerances using conventional techniques such as laser drilling or punching, avoiding the need for excessively tight manufacturing precision while still achieving the desired airflow turbulence and mixing enhancement.