Aerosol-generating system using the venturi effect to deliver substrate to a heating element
AssigneePhilip Morris Products S.A.
InventorKeethan Dasnavis FERNANDO
Life of this patent
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Abstract
An aerosol-generating system is provided, including an air inlet and an air outlet; a liquid storage portion having a liquid outlet and being configured to hold a liquid aerosol-forming substrate; an air flow passage from the air inlet to the air outlet past the liquid outlet, wherein the air flow passage is shaped such that there is a pressure drop within the air flow passage at the liquid outlet when air flows from the air inlet to the air outlet through the air flow passage; and a heating element disposed within the air flow passage between the liquid outlet and the air outlet. There is also provide a cartridge for an aerosol-generating system and a method of generating aerosol from a liquid aerosol-forming substrate.
Claims16
-15. (canceled)
An aerosol-generating system, comprising:
- an air inlet and an air outlet;
- a liquid storage portion having a liquid outlet and being configured to hold a liquid aerosol-forming substrate;
- an air flow passage from the air inlet to the air outlet past the liquid outlet, wherein the air flow passage is shaped such that there is a pressure drop within the air flow passage at the liquid outlet when air flows from the air inlet to the air outlet through the air flow passage;
- and
- a heating element disposed within the air flow passage between the liquid outlet and the air outlet.
A cartridge for an aerosol-generating system, the cartridge comprising:
- an air inlet and an air outlet;
- a liquid storage portion having a liquid outlet and being configured to hold a liquid aerosol-forming substrate;
- and
- an air flow passage from the air inlet to the air outlet past the liquid outlet,
- wherein the air flow passage is shaped such that there is a pressure drop within the air flow passage at the liquid outlet when air flows from the air inlet to the air outlet through the air flow passage.
A method of generating aerosol from a liquid aerosol-forming substrate, the method comprising:
- providing a liquid storage portion having a liquid outlet;
- providing an air flow passage past the liquid outlet;
- drawing liquid from the liquid aerosol-forming substrate out of the liquid outlet into an air flow in the air flow passage by creating a pressure drop in the air flow at the liquid outlet and conveying the liquid in the air flow to a heating element disposed in the air flow passage, the heating element vaporizing the liquid to provide a vapor;
- and
- cooling the vapor to provide an aerosol.
Dependencies are inferred from the claim text.