Cartridge for pump-operated aerosol-generating system

An electrically operated aerosol-generating system comprising:

• a housing configured to define an interior space, the housing including,
• an air inlet configured to direct air into the interior space of the housing, and
• an air outlet configured to direct at least air out of the interior space of the housing;
• a cartridge within the interior space of the housing, the cartridge including,
• a liquid reservoir configured to hold a liquid aerosol-forming substrate, the liquid reservoir including
• a rigid housing that includes a filling port, the filling port being sealed and configured to direct the liquid aerosol-forming substrate into an interior of the liquid reservoir,
• an air inlet valve configured to allow air into the liquid reservoir from the interior space of the housing of the aerosol-generating system based on a pressure difference between the interior of the liquid reservoir and an exterior of the liquid reservoir exceeding a threshold pressure difference, and
• an outlet extending through the rigid housing;
• a vaporizer within the interior space of the housing, the vaporizer configured to vaporize the liquid aerosol-forming substrate;
• and
• a pump connected to the outlet of the cartridge, the pump configured to convey the liquid aerosol-forming substrate from the liquid reservoir to the vaporizer.

A method, comprising:

• conveying a liquid aerosol-forming substrate out of a reservoir based on operation of a pump, the reservoir including a rigid housing held within a housing of an aerosol generating system, the reservoir configured to hold the liquid aerosol-forming substrate, the conveying including conveying the liquid aerosol-forming substrate through an outlet extending through the rigid housing;
• allowing air into the reservoir from an interior of the housing of an aerosol-generating system through the rigid housing based on a pressure difference between an interior of the reservoir and an exterior of the reservoir exceeding a threshold pressure difference;
• piercing a seal of a filling port of the rigid housing;
• and
• directing the liquid aerosol-forming substrate into the interior of the reservoir via the filing port.