Aerosol-generator comprising a plurality of atomisers

Patent metadata

Field	Value
Publication number	US-12382989-B2
Application number	US-202017787776-A
Country	US
Kind code	B2
Filing date	Nov 19, 2020
Priority date	Dec 23, 2019
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

An aerosol-generator for an aerosol-generating device is provided, the aerosol-generator including: a plurality of surface acoustic wave atomisers, each surface acoustic wave atomiser including: a substrate including an active surface, and at least one transducer disposed on the active surface of the substrate to generate surface acoustic waves on the active surface; an atomisation region defined between the substrates of the plurality of surface acoustic wave atomisers; and a supply element arranged to supply a liquid aerosol-forming substrate to the atomisation region. An aerosol-generating device including the aerosol-generator is also provided.

First claim

The invention claimed is:

1. An aerosol-generator for an aerosol-generating device, the aerosol-generator comprising:
a plurality of surface acoustic wave atomisers, each surface acoustic wave atomiser comprising:
a substrate comprising an active surface, and
at least one transducer disposed on the active surface of the substrate and being configured to generate surface acoustic waves on the active surface;

an atomisation region defined between the substrates of the plurality of surface acoustic wave atomisers; and
a supply element arranged to supply a liquid aerosol-forming substrate to the atomisation region.

2. The aerosol-generator according to claim 1 ,
wherein the substrates of the plurality of surface acoustic wave atomisers abut each other to define an opening bounded by the substrates, and
wherein the opening forms the atomisation region.

3. The aerosol-generator according to claim 2 , wherein each of the at least one transducers is configured to generate surface acoustic waves in a direction towards the opening.

4. The aerosol-generator according to claim 2 , wherein each of the substrates has a planar shape.

5. The aerosol-generator according to claim 4 , wherein the substrates of the plurality of surface acoustic wave atomisers are disposed in a common plane.

6. The aerosol-generator according to claim 4 , wherein the substrates of the plurality of surface acoustic wave atomisers are disposed in a non-coplanar arrangement with respect to each other.

7. The aerosol-generator according to claim 4 , wherein the substrates of the plurality of surface acoustic wave atomisers are arranged to form a polyhedral shape.

8. The aerosol-generator according to claim 2 , wherein the plurality of surface acoustic wave atomisers comprises at least three surface acoustic wave atomisers.

9. The aerosol-generator according to claim 8 , wherein each of the substrates has an isosceles trapezoidal prismatic shape.

10. The aerosol-generator according to claim 9 ,
wherein each of the active surfaces of the substrates has an isosceles trapezoidal shape, and
wherein shortest edges of each of the isosceles trapezoidal shapes together define the opening.

11. The aerosol-generator according to claim 2 ,
wherein an edge portion of each of the substrates partially defines the opening, and
wherein each edge portion has a square profile, a rounded profile, a triangular profile, or a bevelled profile.

12. The aerosol-generator according to claim 2 , wherein the supply element comprises a capillary wick extending into the atomisation region.

13. The aerosol-generator according to claim 1 ,
wherein each of the substrates comprises a passive surface opposite the active surface, and
wherein the supply element comprises a groove formed in the passive surface of at least one of the substrates, the groove having an end in fluid communication with the atomisation region.

14. The aerosol-generator according to claim 13 ,
wherein the plurality of surface acoustic wave atomisers further comprises a first surface acoustic wave atomiser comprising a first substrate and a second surface acoustic wave atomiser comprising a second substrate,
wherein the first substrate overlies the second substrate so that the passive surfaces of the first substrate and the second substrate are in contact with each other,
wherein the supply element comprises a first groove formed in the passive surface of the first substrate and a second groove formed in the passive surface of the second substrate, and
wherein the first groove and the second groove overlie each other to form a channel in fluid communication with the atomisation region.

15. An aerosol-generating device, comprising:
an aerosol-generator according to claim 1 ;
a controller configured to control the at least one transducer of each surface acoustic wave atomiser;
a power supply; and
a liquid storage portion configured to receive a liquid aerosol-forming substrate,
wherein the supply element is arranged to supply liquid aerosol-forming substrate from the liquid storage portion to the atomisation region.

16. The aerosol-generating device according to claim 15 ,
further comprising a device housing,
wherein the aerosol-generator is disposed within the device housing, and
wherein the device housing defines at least one air inlet disposed upstream of the atomisation region and at least one air outlet disposed downstream of the atomisation region.

17. The aerosol-generating device according to claim 16 ,
wherein each of the substrates has a planar shape,
wherein the substrates of the plurality of surface acoustic wave atomisers are disposed in a non-coplanar arrangement with respect to each other, and
wherein the aerosol-generator is arranged within the device housing to define an airflow pathway extending between at least one of the planar substrates and a portion of the device housing.

18. The aerosol-generating device according to claim 16 ,
wherein each of the substrates has a planar shape,
wherein the substrates of the plurality of surface acoustic wave atomisers are arranged to form a polyhedral shape, and
wherein the aerosol-generator is arranged within the device housing to define an airflow pathway extending between at least one of the planar substrates and a portion of the device housing.

Assignees

• Philip Morris Products Sa

Inventors

• Dittmann Leander
• Emmett Robert

Classifications

• A61M11/005

  using ultrasonics (spraying or atomising liquids using ultrasonic vibrations in general B05B17/06) · CPC title

• B05B17/0607

  generated by electrical means, e.g. piezoelectric transducers · CPC title

• A24F40/42

  Cartridges or containers for inhalable precursors · CPC title

• B05B17/0676

  Feeding means · CPC title

• A24F40/44

  Wicks · CPC title