Vaporiser assembly for an aerosol-generating system

Patent metadata

Field	Value
Publication number	US-11778696-B2
Application number	US-202016952689-A
Country	US
Kind code	B2
Filing date	Nov 19, 2020
Priority date	Jun 20, 2016
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

A vaporizer assembly includes a tube having a first end with an inlet opening and a second end with an outlet opening. The vaporizer assembly also includes a heater element configured to vaporize liquid aerosol-forming substrate. The heater element is at the second end of the tube. The first end of the tube is fluidly connectable with a liquid storage portion. When the first end of the tube is fluidly connected with the liquid storage portion, the liquid aerosol-forming substrate can flow from the liquid storage portion through the inlet opening into the tube. The outlet opening of the tube includes perforations having a width ranging from about 1 micrometer to about 500 micrometers.

First claim

I claim:

1. A vaporiser assembly for an aerosol-generating system, comprising:
a tube having a first end including an inlet opening and a second end including an outlet opening; and
a heater element configured to vaporize a liquid aerosol-forming substrate, the heater element at the second end of the tube, the first end of the tube being configured to be fluidly connectable with a liquid storage portion such that the liquid aerosol-forming substrate flows from the liquid storage portion through the inlet opening into the tube, the outlet opening of the tube and a portion of the tube between the outlet opening and the inlet opening including perforations.

2. The vaporiser assembly of claim 1 , wherein the tube comprises a glass, a ceramic, or both a glass and a ceramic.

3. The vaporiser assembly of claim 2 , wherein
the heater element includes a metallic thin film, an electric wire, or both a metallic thin film and an electric wire.

4. The vaporiser assembly of claim 1 , wherein the heater element includes a coil wrapped around the second end of the tube, a metallic thin film on a surface of the tube at the second end of the tube, or both a coil wrapped around the second end of the tube and a metallic thin film on a surface of the tube at the second end of the tube.

5. The vaporiser assembly of claim 1 , further comprising:
a pump including a micro-pump system or a mechanical pump syringe system, the pump configured to control flow of the liquid aerosol-forming substrate from the liquid storage portion into the tube.

6. The vaporiser assembly of claim 5 , wherein the liquid aerosol-forming substrate in the tube is pressurized.

7. The vaporiser assembly of claim 1 , wherein the tube includes a hydrophobic layer at the second end of the tube.

8. The vaporiser assembly of claim 7 , wherein the hydrophobic layer is on inner surfaces of perforations.

9. The vaporiser assembly of claim 7 , wherein the hydrophobic layer is on an upper half of a height of inner surfaces of the perforations.

10. The vaporiser assembly of claim 1 , wherein
the tube is made of a conductive material, and
the second end of the tube forms the heater element.

11. An aerosol-generating system, comprising:
a power supply;
electric circuitry configured to control the power supply;
a vaporiser assembly including;
a tube having a first end including an inlet opening and a second end including an outlet opening, and
a heater element configured to vaporize liquid aerosol-forming substrate, the heater element at the second end of the tube, the first end of the tube being configured to be fluidly connectable with a liquid storage portion such that the liquid aerosol-forming substrate flows from the liquid storage portion through the inlet opening into the tube, the outlet opening of the tube and the outlet opening of the tube and a portion of the tube between the outlet opening and the inlet opening including perforations including perforations; and

a replaceable liquid storage portion fluidly connectable with the first end of the tube.

12. The aerosol-generating system of claim 11 , wherein the tube comprises a glass, a ceramic, or both a glass and a ceramic.

13. The aerosol-generating system of claim 12 , wherein the heater element comprises a metallic thin film, an electric wire, or both a metallic thin film and an electric wire.

14. The aerosol-generating system of claim 11 , wherein the heater element includes a coil wrapped around the second end of the tube, a metallic thin film on a surface of the tube at the second end of the tube, or both a coil wrapped around the second end of the tube and a metallic thin film on a surface of the tube at the second end of the tube.

15. The aerosol-generating system of claim 11 , further comprising:
a pump including a micro-pump system or a mechanical pump syringe system, the pump configured to control flow of the liquid aerosol-forming substrate from the liquid storage portion into the tube.

16. The aerosol-generating system to claim 11 , wherein
the tube is made of a conductive material, and
the second end of the tube forms the heater element.

17. The aerosol-generating system of claim 11 , wherein the replaceable liquid storage portion includes a sealing membrane configured to seal an outer circumference of the tube when the tube in inserted into the liquid storage portion.

18. The aerosol-generating system of claim 17 , wherein the replaceable liquid storage portion includes a sealing foil beneath the sealing membrane, the sealing foil being configured to be removed before the first end of the tube is inserted into the replaceable liquid storage portion.

19. The aerosol-generating system of claim 11 , wherein the liquid storage portion further comprises:
a collapsible bag configured to contain the liquid aerosol-forming substrate, the collapsible bag configured to pressurize the liquid aerosol-forming substrate in the liquid storage portion.

20. A method for manufacturing a vaporiser assembly for an aerosol-generating system, the method comprising:
providing a tube having a first end with an inlet opening and a second end with an outlet opening, the first end of the tube configured to be fluidly connectable with a liquid storage portion such that a liquid aerosol-forming substrate flows from the liquid storage portion through the inlet opening into the tube;
placing a heater element at the second end of the tube; and
establishing the outlet opening of the tube and a portion of the tube between the outlet opening and the inlet opening as perforations.

Assignees

• Altria Client Services Llc

Inventors

• Duc Fabien

Classifications

• H05B1/0227 Primary

  Applications · CPC title

• A24F40/42

  Cartridges or containers for inhalable precursors · CPC title

• A24F40/48

  Fluid transfer means, e.g. pumps · CPC title

• A24F40/485

  Valves; Apertures · CPC title

• A24F40/10

  Devices using liquid inhalable precursors · CPC title