Aerosol-generating system and aerosol-generating article for use in such a system

Patent metadata

Field	Value
Publication number	US-10869504-B2
Application number	US-201615751906-A
Country	US
Kind code	B2
Filing date	Aug 16, 2016
Priority date	Aug 17, 2015
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

An aerosol-generating system includes two substance sources, including a nicotine source and a second substance source, and a susceptor for heating any one of the two substance sources. The system also includes a power source connected to a load network, the load network including an inductor for being inductively coupled to the susceptor. The two substance sources are thermally coupled such that the other one of the two substance sources not heated by the susceptor is heatable by heat transfer from the one of the two substance sources that is heated by the susceptor. An aerosol-generating article includes a cartridge including a first compartment and a second compartment source, and a susceptor is arranged in any one of the first compartment or the second compartment.

First claim

The invention claimed is:

1. An aerosol-generating system comprising:
an aerosol-generating article comprising
two substance sources including a nicotine source and a second substance source,
a cartridge comprising a first compartment comprising the nicotine source and a second compartment comprising the second substance source, wherein the first compartment and the second compartment are arranged in parallel within the cartridge,
a susceptor to heat any one of the two substance sources and being arranged in any one of the first compartment or the second compartment; and

a power source connected to a load network, the load network comprising an inductor to be inductively coupled to the susceptor,
wherein the two substance sources are thermally coupled such that the other one of the two substance sources not heated by the susceptor is heatable by heat transfer from the one of the two substance sources that is heated by the susceptor by heat transfer from the compartment in which the susceptor is arranged to the other compartment.

2. The aerosol-generating system according to claim 1 , wherein the susceptor is configured to heat the one of the two substance sources to a first temperature, and wherein a thermal coupling of the two substance sources is configured such that the other one of the two substance sources not heated by the susceptor is heatable by heat transfer to a second temperature, the second temperature being lower than the first temperature.

3. The aerosol-generating system according to claim 1 , wherein the susceptor is in direct contact with the one of the two substance sources that is heated by the susceptor.

4. The aerosol-generating system according to claim 1 , wherein the second substance source is a lactic acid source or pyruvic acid source and an aerosol generated in the aerosol-generating system comprises nicotine salt particles.

5. The aerosol-generating system according to claim 1 , wherein the cartridge further comprises a third compartment comprising an aerosol-modifying agent source.

6. The aerosol-generating system according to claim 1 , wherein the cartridge is cylindrical and one or both of opposed planar end faces of the cartridge is sealed by one or more frangible or removable barriers.

7. The aerosol-generating system according to claim 1 , wherein the first compartment and the second compartment each have a semi-circular transverse cross-section.

8. The aerosol-generating system according to claim 1 , wherein a length of the susceptor is equal to a length of the cartridge.

9. The aerosol-generating system according to claim 1 , wherein the inductor is a single induction coil.

10. An aerosol-generating article comprising a cartridge, the cartridge comprising:
a first compartment comprising a nicotine source;
a second compartment comprising a second substance source;
a susceptor arranged in any one of the first compartment or the second compartment,
wherein the first compartment and the second compartment are arranged in parallel in the cartridge, and
wherein the susceptor is arranged in a central portion of the first compartment or of the second compartment.

11. The aerosol-generating article according to claim 10 , wherein the susceptor is an elongate susceptor.

12. The aerosol-generating article according to claim 10 , the cartridge comprising a separation wall separating the first compartment from the second compartment, wherein the separation wall comprises thermally conductive material.

13. The aerosol-generating article according to claim 11 , wherein the elongate susceptor is in the shape of a susceptor rod.

14. An aerosol-generating article comprising a cartridge, the cartridge comprising:
a first compartment comprising a nicotine source;
a second compartment comprising a second substance source;
a susceptor arranged in any one of the first compartment or the second compartment,
wherein the first compartment and the second compartment are arranged in parallel in the cartridge, and
wherein an outer cartridge wall comprises thermally insulating material.

15. The aerosol-generating article according to claim 14 , wherein the susceptor is an elongate susceptor.

16. The aerosol-generating article according to claim 14 , the cartridge comprising a separation wall separating the first compartment from the second compartment, wherein the separation wall comprises thermally conductive material.

17. A method for controlling a reaction stoichiometry between nicotine vapour and a second substance vapour in an aerosol-generating system for generation of aerosol comprising nicotine, the method comprising: providing two substances including nicotine and a second substance;
arranging the two substances in two separate, thermally coupled compartments arranged in parallel;
providing a susceptor;
arranging the susceptor in one of the two compartments;
heating one of the two substances to a first temperature by the susceptor;
generating a temperature gradient between the two substances; and
heating the other one of the two substances to a second temperature through heat transfer from the one substance heated by the susceptor by heat transfer from the compartment in which the susceptor is arranged to the other compartment,
wherein the second temperature is lower than the first temperature, thereby controlling a ratio of a vaporized amount of nicotine and vaporized amount of second substance.

18. An aerosol-generating article comprising a cartridge, the cartridge comprising:
a first compartment comprising a nicotine source;
a second compartment comprising a second substance source;
a susceptor arranged in any one of the first compartment or the second compartment,
wherein the first compartment and the second compartment are arranged in parallel in the cartridge,
wherein the cartridge comprises a separation wall separating the first compartment from the second compartment,
wherein the separation wall comprises thermally conductive material, and
wherein the separate wall is made of a metal or thermally conductive metal alloy.

19. The aerosol-generating article according to claim 18 , wherein the susceptor is an elongate susceptor.

Assignees

• Philip Morris Products Sa

Inventors

• Mironov Oleg
• Zinovik Ihar Nikolaevich
• Fursa Oleg

Classifications

• F22B1/281

  other than by electrical resistances or electrodes · CPC title

• A24F40/57

  Temperature control · CPC title

• A24F40/465 Primary

  specially adapted for induction heating · CPC title

• A24F40/30 Primary

  Devices using two or more structurally separated inhalable precursors, e.g. using two liquid precursors in two cartridges · CPC title

• A24F40/10

  Devices using liquid inhalable precursors · CPC title