Cartridge for an aerosol-generating system

• US 11,064,737 B2
• Filed: 05/18/2020
• Issued: 07/20/2021
• Est. Priority Date: 04/30/2015
• Status: Active Grant

• Current Assignee: Philip Morris Products SA (Philip Morris Limited)
• Original Assignee: Philip Morris Products SA (Philip Morris Limited)
• Inventors: Mironov, Oleg, Widmer, Jean-Marc
• Primary Examiner(s): Riyami, Abdullah A
• Assistant Examiner(s): Nguyen, Thang H
• Application Number:
  US16/877,244
• Publication Number:
  US 20200275698A1
• Time in Patent Office: 428 Days
• Field of Search: 131329
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/42 Cartridges or containers for inhalable precursors
• CPC Class Codes: A24F 40/46 Shape or structure of electric heating means
• CPC Class Codes: A24F 40/485 Valves; Apertures
• CPC Class Codes: A24F 40/70 Manufacture
• CPC Class Codes: H05B 3/26 heating conductor mounted on insulating base for transparent areas H05B3/84, H05B3/86

Abstract

A cartridge for an aerosol-generating system is provided, the cartridge including: a liquid storage portion including a housing containing a liquid aerosol-forming substrate; a heater assembly including an electrical heating element configured to heat the liquid aerosol-forming substrate to form an aerosol; and a capillary material disposed in contact with the electrical heating element and including a ceramic or a ceramic-based material, the capillary material being configured to convey the liquid aerosol-forming substrate to the electrical heating element, the electrical heating element being supported by a support element having an opening, and the heater assembly further includes first and second electrically conductive contact portions disposed at opposite sides of the opening and being configured to contact with an external electrical power supply. An aerosol-generating system including the cartridge is also provided.

Claims

1. A cartridge for an aerosol-generating system, the cartridge comprising:

a liquid storage portion comprising a housing containing a liquid aerosol-forming substrate;

a heater assembly comprising an electrical heating element configured to heat the liquid aerosol-forming substrate to form an aerosol; and

a capillary material in physical contact with the electrical heating element and comprising a ceramic or a ceramic-based material, the capillary material being configured to convey the liquid aerosol-forming substrate to the electrical heating element by capillary action,

wherein the electrical heating element is supported by an electrically insulating substrate having an opening,

wherein the heater assembly further comprises first and second electrically conductive contact portions disposed at opposite sides of the opening and being configured to contact with a battery configured to supply power to the heater assembly,

wherein the electrical heating element has a first face that is fixed to the electrically insulating substrate and a second face opposite the first face, the second face facing the capillary material, and

wherein the heater assembly is fixed to the housing of the liquid storage portion.

2. The cartridge according to claim 1, wherein both of the capillary material and the electrically insulating substrate are disposed in contact with the electrical heating element.

3. The cartridge according to claim 1, wherein the opening of the electrically insulating substrate has a circular shape, or a square shape, or a rectangular shape.

4. The cartridge according to claim 1, wherein the heater assembly is covered by a removable cover.

5. The cartridge according to claim 1, wherein the electrical heating element comprises a filament disposed in a curved manner between the two electrically conductive contact portions respectively connected to ends of the filament.

6. The cartridge according to claim 1, wherein the capillary material comprises first and second capillary materials.

7. The cartridge according to claim 6,

wherein the first capillary material is in physical contact with the heater assembly, and

wherein the second capillary material is in physical contact with the first capillary material and is spaced apart from the heater assembly by the first capillary material.

8. The cartridge according to claim 1, wherein the electrical heating element is in fluid communication with the liquid aerosol-forming substrate.

9. The cartridge according to claim 5, wherein the filament comprises a material selected from a group consisting of semiconductors, doped ceramics, undoped ceramics, electrically conductive ceramics, carbon, graphite, metals, metal alloys, composites of a ceramic material and a metallic material, and a combination.

10. An aerosol-generating system, comprising:

an aerosol-generating device comprising a power source; and

a cartridge removably coupled to the aerosol-generating device, the cartridge comprising;

a liquid storage portion comprising a housing containing a liquid aerosol-forming substrate,

a heater assembly comprising an electrical heating element configured to heat the liquid aerosol-forming substrate to form an aerosol, and

a capillary material in physical contact with the electrical heating element and comprising a ceramic or a ceramic-based material, the capillary material being configured to convey the liquid aerosol-forming substrate to the electrical heating element by capillary action,

wherein the electrical heating element is supported by an electrically insulating substrate having an opening,

wherein the heater assembly further comprises first and second electrically conductive contact portions disposed at opposite sides of the opening and being configured to contact with a battery,

wherein the electrical heating element has a first face that is fixed to the electrically insulating substrate and a second face opposite the first face, the second face facing the capillary material, and

wherein the heater assembly is fixed to the housing of the liquid storage portion,

wherein the power source of the aerosol-generating device is the battery and is configured to supply power to the heater assembly.

11. The aerosol-generating system according to claim 10, wherein both of the capillary material and the electrically insulating substrate are in physical contact with the electrical heating element.

12. The aerosol-generating system according to claim 10, wherein the aerosol-generating device further comprises a main body and a mouthpiece portion, the mouthpiece portion comprising internal baffles configured to force air flowing through the mouthpiece portion past the cartridge.

13. The aerosol-generating system according to claim 12, wherein the internal baffles are further configured to direct air to flow over the heater assembly.

14. The aerosol-generating system according to claim 10, wherein the heater assembly is covered by a removable cover.

15. The aerosol-generating system according to claim 10, wherein the electrical heating element comprises a filament disposed in a curved manner between the two electrically conductive contact portions respectively connected to ends of the filament.

16. The aerosol-generating system according to claim 15, wherein the filament is substantially flat and is curved along one or more dimensions thereof.

17. The aerosol-generating system according to claim 10, wherein the aerosol-generating device further comprises electric circuitry connected to the heater assembly and to the power source.

18. The aerosol-generating system according to claim 10, wherein the electric circuitry is configured to monitor an electrical resistance of the electrical heating element and to control the supply of power to the heater assembly from the power source.