Aerosol generating device assembly, aerosol generating device and heating assembly of aerosol generating device

The utility model relates to the technical field of atomization devices, in particular to an aerosol generating device assembly, an aerosol generating device and a heating assembly of the aerosol generating device. As the heating assembly comprises the accommodating cavity and the closed air cavity, and the closed air cavity is located at one end, far away from the generating rod insertion opening, of the accommodating cavity, when the heating pipe heats the aerosol generating rod, heat can be transferred to the closed air cavity, and air in the closed air cavity is heated to expand and enters the aerosol generating rod from the air inlet end of the aerosol generating rod; when the aerosol generating device is used, moisture in the aerosol generating rod is driven out from the suction end of the aerosol generating rod, so that when the aerosol generating rod is sucked, the aerosol generating rod cannot be scalded at any time, and the comfort of using the aerosol generating device is improved. 本实用新型涉及雾化装置技术领域，