Aerosol generating system and cartridge with leakage protection

Patent metadata

Field	Value
Publication number	US-2022015433-A1
Application number	US-201917294841-A
Country	US
Kind code	A1
Filing date	Dec 6, 2019
Priority date	Dec 7, 2018
Publication date	Jan 20, 2022
Grant date	—

Abstract

An aerosol-generating system, comprising: an aerosol generating substrate; an air inlet ( 16 ); an air outlet ( 28 ); an airflow passage ( 22 ) extending from the air inlet to the air outlet; an atomisation chamber ( 23 ) within the airflow passage; an aerosol-generating element within the atomisation chamber configured to atomize the aerosol-generating substrate to generate an aerosol; and an inlet filter ( 24 ) in the airflow passage between the air inlet and the atomisation chamber. Advantageously, the inlet filter is configured to allow for a flow of air into the airflow passage from the air inlet, through the inlet filter, but configured to prevent liquid, or liquid droplets greater than a predetermined size, within the airflow passage from passing through the inlet filter towards the air inlet.

First claim

1 . An aerosol-generating system, comprising:
an aerosol-forming substrate; an air inlet; an air outlet; an airflow passage extending from the air inlet to the air outlet; an atomisation chamber within the airflow passage; an aerosol-generating element within the atomisation chamber configured to atomize the aerosol-forming substrate to generate an aerosol; and an inlet filter in the airflow passage between the air inlet and the atomisation chamber;
wherein the inlet filter comprises a plurality of meshes.

2 . The aerosol-generating system according to claim 1 , wherein the inlet filter comprises a mesh.

3 . The aerosol-generating system according to claim 1 , further comprising an outlet filter in the airflow passage between the air outlet and the atomisation chamber.

4 . The aerosol-generating system according to claim 3 , wherein the outlet filter comprises a mesh.

5 . The aerosol-generating system according to claim 1 , wherein the plurality of meshes are different to one another.

6 . The aerosol-generating system according to claim 2 , wherein the inlet filter comprises a mesh formed from wire having a diameter between about 10 μm and 100 μm.

7 . The aerosol-generating system according to claim 2 , wherein the inlet filter comprises a mesh having interstices with a diameter of between 20 μm and 200 μm.

8 . The aerosol-generating system according to claim 1 , wherein the airflow passage extend in a straight line between the air inlet and the air outlet.

9 . The aerosol-generating system according to claim 1 , wherein the aerosol-generating element comprises a heating element.

10 . The aerosol-generating system according to claim 9 , wherein the heating element is a mesh heating element.

11 . The aerosol-generating system according to according to claim 1 , wherein the inlet filter comprises a hydrophobic or oleophobic coating.

12 . The aerosol-generating system according to claim 1 , comprising:
a cartridge coupled to a device portion, wherein the cartridge comprises: the aerosol-forming substrate, the atomisation chamber and the aerosol generating element; wherein the device portion comprises a power supply and control circuitry connected to the power supply, and is coupled to the cartridge to allow for a supply of power from the power supply to the aerosol-generating element.

13 . The aerosol-generating system according to claim 12 , wherein the cartridge comprises the air inlet and the inlet filter.

14 . A cartridge for an electrically heated aerosol-generating system, the cartridge comprising:
an aerosol-forming substrate; an air inlet; an air outlet; an airflow passage extending from the air inlet to the air outlet; an atomisation chamber within the airflow passage; an aerosol-generating element within the atomisation chamber configured to atomize the aerosol-forming substrate to generate an aerosol; and an inlet filter in the airflow passage between the air inlet and the atomisation chamber;
wherein the inlet filter comprises a plurality of meshes.

Assignees

• Philip Morris Products Sa

Inventors

• Saygili Ali Murat

Classifications

• H02M1/0003

  Details of control, feedback or regulation circuits · CPC title

• A24F7/04

  with smoke filters · CPC title

• A24F40/485 Primary

  Valves; Apertures · CPC title

• A24F40/10

  Devices using liquid inhalable precursors · CPC title

• A24F40/42

  Cartridges or containers for inhalable precursors · CPC title