came across this patent for a convection vape from pax:
JP2019523037A - Instant portable thermal convection vaporizer - Google Patents
Instant hand-held vaporizer that operates mainly by thermal convection. The vaporizer is a predetermined or selectable vaporizer that draws air drawn through the oven chamber to vaporize material held in the oven chamber (eg, plant material in the form of chopped leaves). It is configured to be...
patents.google.com