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WO2025012018A1 - Dispositif de génération d'aérosol et système de génération d'aérosol - Google Patents

Dispositif de génération d'aérosol et système de génération d'aérosol Download PDF

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Publication number
WO2025012018A1
WO2025012018A1 PCT/EP2024/068560 EP2024068560W WO2025012018A1 WO 2025012018 A1 WO2025012018 A1 WO 2025012018A1 EP 2024068560 W EP2024068560 W EP 2024068560W WO 2025012018 A1 WO2025012018 A1 WO 2025012018A1
Authority
WO
WIPO (PCT)
Prior art keywords
aerosol generating
heating compartment
heater
heat spreader
zones
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/068560
Other languages
English (en)
Inventor
Tilen CEGLAR
Jaakko MCEVOY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JT International SA
Original Assignee
JT International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JT International SA filed Critical JT International SA
Publication of WO2025012018A1 publication Critical patent/WO2025012018A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/20—Devices using solid inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/42—Cartridges or containers for inhalable precursors

Definitions

  • the present disclosure relates generally to an aerosol generating device, and more particularly to an aerosol generating device for heating an aerosol generating substrate to generate an aerosol for inhalation by a user.
  • the present disclosure also relates to an aerosol generating system comprising an aerosol generating device and an aerosol generating article comprising an aerosol generating substrate.
  • reduced-risk or modified-risk devices also known as vaporisers
  • Various devices and systems are available that heat or warm, rather than bum, an aerosol generating substrate to generate an aerosol for inhalation by a user.
  • a commonly available reduced-risk or modified-risk device is an aerosol generating device, or so-called heat-not-bum device.
  • Devices of this type generate an aerosol or vapour by heating an aerosol generating substrate, for instance comprised in an aerosol generating article, to a temperature typically in the range 150°C to 350°C, in a heating compartment. Heating the aerosol generating substrate to a temperature within this range, without burning or combusting the aerosol generating substrate, generates a vapour which typically cools and condenses to form an aerosol for inhalation by a user of the device.
  • airflow channels allow air to be drawn through the aerosol generating substrate during use.
  • the aerosol generating substrate can be localised in specific areas of an aerosol generating article, rather than being evenly distributed, for instance, to accommodate airflow channels.
  • an aerosol generating article is heated uniformly in the heating compartment, irrespective of where the aerosol generating substrate is localised or where airflow channels are provided, which can lead to inefficient heating.
  • an aerosol generating device comprising: a heating assembly, wherein the heating assembly comprises a heating compartment arranged to receive an aerosol generating article, the aerosol generating article comprising a substrate portion, the substrate portion comprising an aerosol generating substrate, wherein the aerosol generating substrate comprises a plurality of airflow channels, wherein the airflow channels allow air to be drawn through the substrate portion during use, wherein the heating assembly further comprises a heater arranged to heat the substrate portion of the aerosol generating article during use; and a heat spreader, wherein the heat spreader comprises a plurality of thermal conduction zones and a plurality of thermal insulation zones, wherein each of the thermal insulation zones substantially aligns with an airflow channel when an aerosol generating article is received in the heating compartment.
  • an aerosol generating system comprising an aerosol generating device and an aerosol generating article, wherein: the aerosol generating article comprises a substrate portion, the substrate portion comprising an aerosol generating substrate, wherein the aerosol generating substrate comprises a plurality of airflow channels that allow air to be drawn through the substrate portion during use; the aerosol generating device comprises: a heating assembly comprising a heating compartment arranged to receive the aerosol generating article, the heating assembly further comprising a heater arranged to heat the substrate portion of the aerosol generating article during use; and a heat spreader, wherein the heat spreader comprises a plurality of thermal conduction zones and a plurality of thermal insulation zones, wherein each of the thermal insulation zones substantially aligns with an airflow channel when the aerosol generating article is received in the heating compartment.
  • each of the thermal conduction zones substantially aligns with a protrusion of the aerosol generating substrate when an aerosol generating article is received in the heating compartment.
  • the configuration of the heat spreader results in targeted heating of the protrusions which are areas of the aerosol generating article where the aerosol generating substrate is localised. This further improves heating efficiency and improves initial heat-up time.
  • the thermal conduction zones and thermal insulation zones are arranged in adjacent rows.
  • the heating compartment has a heating compartment axis X, wherein the adjacent rows are aligned with the heating compartment axis X. This arrangement is complementary to the pattern of the airflow channels and protrusions in aerosol generating articles useable with aerosol generating devices according to examples of the disclosure.
  • the thermal conduction zones may be anisotropic. Possibly, the anisotropic thermal conduction zones have an in-plane thermal conductivity of from 500 to 2000 W/m-K and an out-of-plane thermal conductivity of from 5 to 50 W/m-K.
  • the thermal conduction zones may have a thickness of from 10 to 100 microns.
  • This anisotropy means that more heat is spread out or distributed over the thermal conduction zones than passes through the thickness of the thermal conduction zones. Such anisotropic thermal conduction zones are efficient in spreading or distributing heat, and thus reduce the likelihood of a hotspot occurring.
  • the thermal conduction zones may comprise graphite.
  • Graphite is anisotropic and owing to its in plane metallic bonding is an excellent thermal conductor.
  • the thermal insulation zones may comprise a polyimide or an aerogel. These materials have an extremely low thermal conductivity and are thus excellent thermal insulators.
  • the heating compartment may be dimensioned to receive an aerosol generating article having a flat cuboid shape.
  • This arrangement permits the aerosol generating device to be useable with aerosol generating articles having a flat cuboid shape.
  • the heat spreader is disposed between the heater and an external surface of the heating compartment.
  • the heat spreader is attached to the external surface of the heating compartment and the heater is attached to the heat spreader.
  • the heating compartment provides a structure on which the heat spreader and heater are supported.
  • the heater comprises a first planar heater and a second planar heater, the first and second planar heaters being provided in a substantially parallel orientation, and spaced apart to create a cavity in a layer between them, wherein the heating compartment is defined by the first and second planar heaters, wherein a first heat spreader is disposed in the cavity and associated with the first planar heater, and a second heat spreader is disposed in the cavity and associated with the second planar heater.
  • the first heat spreader is attached to the first planar heater and the second heat spreader is attached to the second planar heater.
  • first and second planar heaters negates the requirement for separate heating compartment walls. Furthermore, the heat spreaders are respectively supported by the first and second planar heaters.
  • Figure 1 is a schematic cross-sectional view of an aerosol generating device
  • Figure 2 is a diagrammatic perspective view of an aerosol generating article suitable for use with the aerosol generating device of Figure 1;
  • Figure 3 is an end view of the aerosol generating article of Figure 2 showing a substrate portion;
  • Figure 4 is a diagrammatic perspective view of a heating assembly of an example aerosol generating device shown with an aerosol generating article received in the heating compartment;
  • Figure 5 is another diagrammatic perspective view of the heating assembly of Fig. 4 but with the heater omitted;
  • Figure 6 is a diagrammatic perspective front view of another heating assembly of an example aerosol generating device shown with an aerosol generating article received in the heating compartment;
  • Figure 7 is a diagrammatic perspective rear view of the heating assembly of Fig. 6;
  • Figure 8 is a diagrammatic front view of the heating assembly of Fig. 6;
  • Figure 9 is a diagrammatic perspective front view of the heating assembly of Fig. 6 but with electrical connector wires and temperature sensor wires omitted;
  • Figure 10 is a diagrammatic perspective rear view of the heating assembly of Fig. 9;
  • Figure 11 is a diagrammatic front view of the heating assembly of Fig. 9.
  • FIG. 1 there is shown schematically an aerosol generating device 10 according to the present disclosure.
  • the aerosol generating device 10 is configured to be used with an aerosol generating article 16 comprising an aerosol generating substrate 20.
  • the aerosol generating device 10 and the aerosol generating article 16 together form an aerosol generating system.
  • a suitable aerosol generating article 16 is shown diagrammatically in Figures 2 and 3 and is described in detail below.
  • the aerosol generating device 10 may equally be referred to as a “heated tobacco device”, a “heat-not-bum tobacco device”, a “device for vaporising tobacco products”, and the like, with this being interpreted as a device suitable for achieving these effects.
  • the features disclosed herein are equally applicable to devices which are designed to vaporise any aerosol generating substrate.
  • the aerosol generating device 10 is a hand-held, portable, device, by which it is meant that a user is able to hold and support the device unaided, in a single hand.
  • the aerosol generating device 10 has a first (or proximal) end 40 and a second (or distal) end 42 and comprises a device housing 44 which provides an external casing 46 of the aerosol generating device 10.
  • the device housing 44 may be tubular.
  • the device housing 44 contains and protects the internal components of the aerosol generating device 10.
  • the aerosol generating device 10 includes a controller 48, which may be a printed circuit board assembly (PCBA).
  • the aerosol generating device 10 may include a user interface for controlling the operation of the aerosol generating device 10 via the controller 48.
  • the controller 48 may be configured to detect the initiation of use of the aerosol generating device 10, for example, in response to a user input, such as a button press to activate the aerosol generating device 10, or in response to a detected airflow through the aerosol generating device 10.
  • a user input such as a button press to activate the aerosol generating device 10
  • an airflow through the aerosol generating device 10 is indicative of a user inhalation or ‘puff.
  • the aerosol generating device 10 may, for example, include a puff detector, such as an airflow sensor (not shown), to detect an airflow through the aerosol generating device 10.
  • the controller 48 includes electronic circuitry.
  • the aerosol generating device 10 includes a power source 50, such as a battery.
  • a button 64 is provided on the device housing 44 in electrical connection with the controller 48 for enabling a user to initiate aerosol generation.
  • the aerosol generating device 10 comprises a heating assembly 12, 86.
  • the heating assembly 12, 86 comprises a heating compartment 14 arranged to receive an aerosol generating article 16.
  • the heating compartment 14 defines a cavity 52 for receiving an aerosol generating article 16.
  • an aerosol generating article 16 is positioned in the cavity 52 by a user. After use, the aerosol generating article 16 can be removed from the cavity 52 by a user and discarded.
  • the heating compartment 14 has a first end 54 and a second end 56.
  • the heating compartment 14 includes an opening 57 at the first end 54 for receiving an aerosol generating article 16.
  • the device housing 44 may comprise a mechanism (not shown), such as a door or a removable part that enables insertion of the aerosol generating article 16 into the cavity 52.
  • an air inlet 58 is provided on the device housing 44 and is fluidically connected to the cavity 52.
  • An airflow channel (A) connects the cavity 52 to an air outlet 60 provided in a mouthpiece 62 to enable a user to draw air from the air inlet 58 through the cavity 52.
  • Figure 2 shows an example aerosol generating article 16 suitable for use with the aerosol generating device 10 of Figure 1.
  • Figure 3 is an end view of the aerosol generating article 16 shown in Figure 2.
  • the example aerosol generating article 16 is a flat-shaped article having, for example, a flat cuboid shape extending along an article axis Y and having external dimensions LxWxD.
  • the length L of the aerosol generating article 16 according to the article axis X may be in the range from 20 to 45 mm, preferably from 25 to 40 mm, more preferably from 28 to 36 mm, for example 33 mm
  • the width W may be in the range from 8 to 18 mm, preferably from 10 to 16 mm, more preferably from 10 to 14 mm, for example 12 mm
  • the depth D may be in the range from 1 to 5 mm, preferably from 1 to 3 mm, more preferably from 1 to 2 mm, for example 1.4 mm.
  • the values L, W and D can be selected within a range of +/- 40%, for example.
  • the depth D is formed by a pair of parallel walls 76A, 76B, called hereinafter narrow walls 76A, 76B
  • the width W is formed by a pair of parallel walls 78A, 78B, called hereinafter wide walls 78A, 78B.
  • the edges between the wide and narrow walls 76A, 76B, 78A, 78B can be rounded.
  • the aerosol generating article 16 can have any suitable flat shape and/or external dimensions.
  • the aerosol generating article 16 can present any other suitable shape.
  • the aerosol generating article 16 may be generally cylindrical or rod-shaped.
  • the aerosol generating article 16 may be formed substantially in the shape of a stick, and may broadly resemble a cigarette, having a tubular region with an aerosol generating substrate 20 arranged in a suitable manner.
  • the shape of the aerosol generating article 16 corresponds to the shape of the heating compartment 14, and in particular to the shape of the cavity 52 defined by the heating compartment 14.
  • the aerosol generating article 16 comprises a substrate portion 18 and a mouthpiece portion 66 arranged along the article axis Y.
  • the substrate portion 18 may for example be slightly longer than the mouthpiece portion 66.
  • the length L2 of the substrate portion 18 according to the article axis Y may be substantially equal to 18 mm and the length LI of the mouthpiece portion 66 according to the article axis Y may be substantially equal to 15 mm.
  • the substrate portion 18 defines an abutting end 68 of the aerosol generating article 16 and the mouthpiece portion 66 defines a mouth end 70 of the aerosol generating article 16.
  • the substrate portion 18 and the mouthpiece portion 66 may be fixed one to the other by a wrapper 72 extending around the article axis Y.
  • the wrapper 72 may, for example, comprise paper and/or non-woven fabric and/or aluminium foil.
  • the wrapper 72 may be porous or air impermeable and forms a plurality of airflow channels extending inside the aerosol generating article 16.
  • the mouthpiece portion 66 comprises a core 74 intended to act for example as a cooler to cool slightly the vapour before it is inhaled by the user.
  • the core 74 may comprise for this purpose corrugated paper.
  • the core 74 may be formed through an extrusion and/or rolling process into a stable shape.
  • the core 74 is arranged inside the mouthpiece portion 66 to be entirely in contact with the internal surface of the wrapper 72 delimiting this mouthpiece portion 66.
  • the aerosol generating article 16 can have a total volume of 2118 mm 3 or 554 mm 3 .
  • the aerosol generating article 16 comprises an aerosol generating substrate 20.
  • the aerosol generating substrate 20 may be any type of solid or semi-solid material.
  • Example types of aerosols generating solids include powder, granules, pellets, shreds, strands, particles, gel, strips, loose leaves, cut leaves, cut filler, porous material, foam material or sheets.
  • the aerosol generating substrate 20 may comprise plant derived material and in particular, may comprise tobacco. It may advantageously comprise reconstituted tobacco, for example including tobacco and any one or more of cellulose fibres, tobacco stalk fibres and inorganic fillers such as CaCCE.
  • the reconstituted tobacco may comprise tobacco sheets of any kind (paper-like sheets, cast tobacco sheets, corrugated sheets, etc.) in full sheets being crimped, folded and/or rolled or sheet fragments, and in an orientated gathered form (e.g., parallel arrangement or weaved pattern of substantially identical sheet fragments) or in randomly arranged form (e.g., sheet fragments of various sizes and shapes in bulk mixed form as tobacco cut filler).
  • the aerosol generating substrate 20 may be a tobacco plug.
  • the aerosol generating substrate 20 may comprise an aerosol-former.
  • aerosolformers include polyhydric alcohols and mixtures thereof such as glycerine or propylene glycol.
  • the aerosol-former may include other alcohols, such as ethanol, 1,3-propanediol, or may include water.
  • the aerosol generating substrate 20 comprises an aerosol-former content of between approximately 5% and approximately 50% on a dry weight basis of the aerosol generating substrate 20.
  • the aerosol generating substrate comprises an aerosol-former content of between approximately 10% and approximately 20% on a dry weight basis of the aerosol generating substrate 20, and possibly approximately 15% on a dry weight basis of the aerosol generating substrate 20.
  • the volatile compounds may include nicotine or flavour compounds such as tobacco flavouring.
  • the aerosol generating substrate 20 in the aerosol generating article 16 comprises, by percentage of weight, 50% tobacco, 11.5% Propylene Glycol (PG), 20% Glycerin, 11.0% binder, 4.5% gum, and 3% water.
  • the aerosol generating substrate 20 in the aerosol generating article 16 can have a weight of 200 mg.
  • the aerosol generating substrate 20 can contain 3.07 mg of Nicotine.
  • the aerosol generating substrate 20 can have a weight of 275mg, contain 4.76 mg of Nicotine, 0.9 mg of PG, 44.5 mg of Glycerin.
  • the wrapper 72 can include a base paper of 0. 13 mm thickness and a basis weight of 100 g/m 2
  • the wrapper 72 can include an aluminium foil of 0.006 mm thickness.
  • the core 74 can comprise paper having 0. 13 mm thickness and basis weight of 100 g/m 2 .
  • the aerosol generating article 16 is a disposable and replaceable article which may, for example, contain tobacco as the aerosol generating substrate 20.
  • the aerosol generating article 16 may be a heated tobacco stick.
  • the aerosol generating article 16 is a consumable.
  • Figure 3 is an end view of the aerosol generating article 16 illustrated in Figure 2, looking at the abutting end 68.
  • the substrate portion 18 comprises the aerosol generating substrate 20, i.e., a vaporizable material, for heating in the heating assembly 12.
  • the aerosol generating substrate 20 comprises tobacco.
  • the aerosol generating substrate 20 is arranged within the wrapper 72 and has a corrugated shape so that a plurality of airflow channels 22 aligned with the article axis Y are formed within the substrate portion 18.
  • the airflow channels 22 allow air to be drawn through the aerosol generating article 16 during use so that generated aerosol can be drawn from the cavity 52 more easily.
  • the corrugated shape also defines a plurality of protrusions 38 adjacent the airflow channels 22.
  • Figures 4 and 5 show the heating assembly 12 of an aerosol generating device 10 according to examples of the disclosure, wherein an aerosol generating article 16 is received in the heating compartment 14.
  • the heater 24 (although present) has been omitted from Figure 5.
  • the heating assembly 12 comprises a heater 24 arranged to heat the aerosol generating substrate 20 of the aerosol generating article 16 during use.
  • the heater 24 is a flexible heater comprising an electrical heating element 80.
  • the heater 24 may have a different arrangement.
  • the heater 24 may be a resistive heater or an induction heatable susceptor in conjunction with an induction coil.
  • the heater 24 is arranged to surround, or to fully surround, the heating compartment 14.
  • the heating compartment 14 forms a cup shaped arrangement 15 having a wall 19 and adapted to receive at least the substrate portion 18 of the aerosol generating article 16 and, in some cases, at least a part of the mouthpiece portion 66.
  • the heating compartment 14 is dimensioned to receive an aerosol generating article 16 having a flat cuboid shape as described above.
  • the heating compartment 14 therefore forms a cuboid shape, similar to the aerosol generating article 16 described above in relation to Figures 3 and 4. This arrangement permits the aerosol generating device 10 to be useable with aerosol generating articles 16 having a flat cuboid shape.
  • heat from the heater 24 is transferred to the aerosol generating substrate 20 of an aerosol generating article 16 positioned in the cavity 52 of the heating compartment 14, for example by conduction, radiation and convection, to heat the aerosol generating substrate 20 (without burning the aerosol generating substrate 20) and thereby generate a vapour which cools and condenses to form an aerosol for inhalation by a user of the aerosol generating device 10, for instance, through a filter.
  • vapour is a substance in the gas phase at a temperature lower than its critical temperature, which means that the vapour can be condensed to a liquid by increasing its pressure without reducing the temperature
  • aerosol is a suspension of fine solid particles or liquid droplets, in air or another gas.
  • the aerosol generating device 10 comprises a heat spreader 26 disposed between the heater 24 and an external surface 17 of the heating compartment 14.
  • the wall 19 of the heating compartment 14 provides the external surface 17. Accordingly, in this example the heat spreader 26 is positioned outside the heating compartment 14, i.e., the heat spreader 26 is positioned on the external surface 17 of the heating compartment 14.
  • the heater spreader 26 is not therefore positioned in the cavity 52 of the heating compartment 14.
  • the heater spreader 26 is positioned outside the cavity 52.
  • the heater 24 (although present) has been omitted from Figure 5 to better show the heat spreader 26.
  • the heat spreader 26 is a structured heat spreader 26.
  • the heat spreader 26 is arranged to surround, or to fully surround, the heating compartment 14. In the illustrated example, the heat spreader 26 overlies only a part of the heating compartment 14 accommodating the substrate portion 18 of the aerosol generating article 16.
  • the heat spreader 26 comprises a plurality of thermal conduction zones 28 and a plurality of thermal insulation zones 30.
  • Each of the thermal insulation zones 30 substantially aligns with an airflow channel 22 when an aerosol generating article 16 is received in the heating compartment 14. Accordingly, the thermal insulation zones 30 overlie airflow channels 22 when an aerosol generating article 16 is received in the heating compartment 14.
  • the configuration of the heat spreader 26 results in targeted heating of the aerosol generating article 10 by minimising heating of the airflow channels 22. This improves heating efficiency.
  • each of the thermal conduction zones 28 substantially aligns with a protrusion 38 of the aerosol generating substrate 20 when an aerosol generating article 16 is received in the heating compartment 14.
  • the protrusions 38 are in direct contact with an internal surface 21 of the heating compartment 14, and are thus closest to the heater 24, i.e., closer to the heater 24 than aerosol generating substrate 20 comprised in the airflow channels 22. Accordingly, the configuration of the heat spreader 26 results in targeted heating of the protrusions 38 which are areas of the aerosol generating article 10 where the aerosol generating substrate 20 is localised. This further improves heating efficiency and improves initial heat-up time.
  • the heat flux is more directed to the areas of the aerosol generating substrate 20 that are closer to the heat source.
  • the thermal conduction zones 28 are substantially offset from airflow channels 22 and the thermal insulation zones 30 are substantially offset from protrusions 38.
  • the thermal conduction zones 28 and thermal insulation zones 30 are arranged in adjacent rows 32. This arrangement is complementary to the pattern of the airflow channels 22 and protrusions 38 in aerosol generating articles 16 useable with aerosol generating devices 10 according to examples of the disclosure.
  • the thermal conduction zones 28 and the thermal insulation zones 30 may be provided by strips of different materials arranged in adjacent rows 32.
  • the aerosol generating substrate 20 has a corrugated shape which defines a plurality of airflow channels 22 and protrusions 38 as described above.
  • the corrugated shape of the aerosol generating substrate 20 has two faces 82, 84, as best shown in Figure 3. Each face 82, 84 comprises a plurality of airflow channels 22 and protrusions 38.
  • the corrugations are vertically symmetrical so that an article 16 can be received in the heating compartment 14 with either face 82, 84 presenting in-use upwards, and the protrusions 38 and airflow channels 22 will respectively align with the thermal conduction zones 28 and thermal insulation zones 30.
  • the aerosol generating article 16 can be inserted into the heating compartment 14 either way, and the pattern of the aerosol generating substrate 20 (i.e., the pattern of airflow channels 22 and protrusions 38) still match the pattern of thermal conduction zones 28 and thermal insulation zones 30 of the heat spreader 26.
  • the pattern of the aerosol generating substrate 20 i.e., the pattern of airflow channels 22 and protrusions 38
  • the heat spreader 26 may be attached to the heating compartment 14, for example, the heat spreader 26 may be attached to the heating compartment 14 with a layer of temperature resistant adhesive.
  • the heater 24 may be attached to the heat spreader 26.
  • the heating compartment 14 provides a structure on which the heat spreader 26 and heater 24 are supported.
  • the heat spreader 26 is in compression between the heating compartment 14 and the heater 24, i.e., is pressed between the heating compartment 14 and the heater 24. Pressure may be applied by wrapping insulation on top of the heater 24.
  • the heating compartment 14 has a heating compartment axis X.
  • the heating compartment 14 provides the cavity 52 for receiving the aerosol generating article 16.
  • the airflow channels 22 align with the heating compartment axis X when an aerosol generating article 16 is received in the cavity 52 of the heating compartment 14.
  • the adjacent rows 32 of thermal conduction zones 28 and thermal insulation zones 30 are aligned with the heating compartment axis X.
  • the article axis Y and the heating compartment axis X align.
  • the thermal conduction zones 28 are anisotropic. Thermal conduction zones 28 are anisotropic such that that the thermal conductivity in directions substantially parallel to the thermal conduction zones 28 is higher compared to the thermal conductivity in a direction substantially perpendicular to the thermal conduction zones 28. This anisotropy means that more heat is spread out or distributed over the thermal conduction zones 28 than passes through the thickness of the thermal conduction zones 28. Such anisotropic thermal conduction zones 28 are efficient in spreading or distributing heat, and thus reduce the likelihood of a hotspot occurring.
  • the thermal conduction zones 28 comprise graphite.
  • the thermal conduction zones 28 may be formed from a material comprising graphite.
  • Graphite is anisotropic and owing to in plane metallic bonding is an excellent thermal conductor.
  • the anisotropic thermal conduction zones 28 have an in-plane thermal conductivity of from 500 to 2000 W/m-K and an out-of-plane thermal conductivity of from 5 to 50 W/m-K.
  • the thermal conduction zones 28 are formed from an anisotropic material.
  • the thermal conduction zones 28 are formed from a material having an in-plane thermal conductivity of from 500 to 2000 W/m-K and an out-of-plane thermal conductivity of from 5 to 50 W/m-K.
  • the thermal conduction zones 28 have a thickness of from 10 to 100 microns.
  • the thermal insulation zones 30 may comprise a polyimide such as Kapton®.
  • the thermal insulation zones 30 may be formed from a material comprising polyimide.
  • the thermal insulation zones 30 may comprise an aerogel.
  • the thermal insulation zones 30 may be formed from a material comprising an aerogel.
  • the aerogel may be an aerogelbased material, which may be in the form of a tape. Aerogels are a class of synthetic porous ultralight material derived from a gel, in which the liquid component of the gel has been replaced with a gas, without significant collapse of the gel structure. The result is a solid with extremely low density and extremely low thermal conductivity. Aerogels can be made from a variety of chemical compounds.
  • Polyimides such as Kapton®, and aerogels have an extremely low thermal conductivity and are thus excellent thermal insulators.
  • Figure 6 to 11 show another example heating assembly 86 of an aerosol generating device 10 according to examples of the disclosure.
  • the heating assembly 86 is similar to the heating assembly 12 described above and corresponding components are identified using the same reference numerals.
  • the only difference between the arrangement of Figures 6 to 8 and the arrangement of Figures 9 to 11 is that electrical connector wires 90 and temperature sensor wires 91 are shown in Figures 6 to 8 but (although present) have been omitted from Figures 9 to 11.
  • the heater 24 comprises a first planar heater 34 and a second planar heater 36.
  • the first and second planar heaters 34, 36 are provided in a substantially parallel orientation, and spaced apart to create the cavity 52 in a layer between them.
  • the first and second planar heaters 34, 36 define the heating compartment 14.
  • the first and second planar heaters 34, 36 are rigid and form the walls 19 of the heating compartment 14, i.e., oven walls 19.
  • the provision of first and second planar heaters 34, 36 negates the requirement for separate heating compartment walls (such as in the cup shaped arrangement 15 of the heating compartment 14 shown in Figures 4 and 5 having wall 19).
  • an aerosol generating article 16 is receivable in the heating compartment 14 between the first planar heater 34 and the second planar heater 36. Accordingly, the aerosol generating article 16 can be received in the cavity 52 defined by the heating compartment 14 between the first planar heater 34 and the second planar heater 36.
  • the aerosol generating article 16 is receivable in the heating compartment 14 such that at least the substrate portion 18 of the aerosol generating article 16 is disposed between the first planar heater 34 and the second planar heater 36.
  • a first heat spreader 26 is disposed in the cavity 52 and associated with the first planar heater 34, and a second heater spreader 26 is disposed in the cavity 52 and associated with the second planar heater 36.
  • the first heat spreader 26 is attached to the first planar heater 34 and the second heat spreader 26 is attached to the second planar heater 36.
  • the heat spreaders 26 are therefore respectively supported by the first and second planar heaters 34, 36.
  • one of the heat spreaders 26 is positioned directly between the first planar heater 34 and the aerosol generating article 16 and the other of the heat spreaders 26 is positioned directly between the second planar heater 36 and the aerosol generating article 16.
  • the heat spreader 26 is on an inner surface of the first and second planar heaters 34, 36, respectively.
  • Each planar heater 34, 36 of the heating assembly 12 comprises a rectangular ceramic plate with an electrical heating element 80 (i.e., heater track) embedded inside the ceramic plate.
  • the electrical heating elements 80 have a high electrical resistance and generate heat in response to an electric current flow.
  • the ceramic plates conduct heat from the heating elements 80 and transfer the heat to the aerosol generating article 16 by conduction through the heat spreaders 26.
  • the air in the cavity 52 is also heated.
  • the first and second planar heaters 34, 36 may be other types of heaters, such as non-ceramic metal heating plates.
  • the Figures also illustrate a method of manufacturing an aerosol generating device 10 according to examples of the disclosure.
  • the Figures also illustrate a method of providing an aerosol generating system according to examples of the disclosure.

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  • Resistance Heating (AREA)

Abstract

Un système de génération d'aérosol comprend un dispositif de génération d'aérosol (10) et un article de génération d'aérosol (16). L'article de génération d'aérosol (16) comprend une partie substrat (18) comprenant un substrat de génération d'aérosol (20). Le substrat de génération d'aérosol (20) comprend une pluralité de canaux d'écoulement d'air (22) qui permettent à l'air d'être aspiré à travers la partie substrat (18) pendant l'utilisation. Le dispositif de génération d'aérosol (10) comprend un ensemble de chauffage (12, 86) comprenant un compartiment de chauffage (14) conçu pour recevoir l'article de génération d'aérosol (16), l'ensemble de chauffage (12, 86) comprenant en outre un dispositif de chauffage (24) conçu pour chauffer la partie substrat (18) de l'article de génération d'aérosol (16) pendant l'utilisation. Le dispositif de génération d'aérosol (10) comprend en outre un dissipateur thermique (26) comprenant une pluralité de zones de conduction thermique (28) et une pluralité de zones d'isolation thermique (30). Chacune des zones d'isolation thermique (30) s'aligne sensiblement avec un canal d'écoulement d'air (22) lorsque l'article de génération d'aérosol (16) est reçu dans le compartiment de chauffage (14).
PCT/EP2024/068560 2023-07-11 2024-07-02 Dispositif de génération d'aérosol et système de génération d'aérosol Pending WO2025012018A1 (fr)

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EP23184668.4 2023-07-11

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021233792A1 (fr) * 2020-05-22 2021-11-25 Jt International Sa Dispositif de génération d'aérosol
US20220211101A1 (en) * 2019-05-29 2022-07-07 Jt International S.A. Cartridge for an Aerosol Generating Device
WO2022223707A1 (fr) * 2021-04-23 2022-10-27 Jt International Sa Article de génération d'aérosol et son procédé de fabrication, et système de génération d'aérosol
WO2022238338A1 (fr) * 2021-05-10 2022-11-17 Jt International S.A. Dispositif de génération d'aérosol comprenant deux éléments chauffants
US20230054752A1 (en) * 2020-05-07 2023-02-23 Juul Labs, Inc. Vaporizer cartridge for heating more than one vaporizable material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220211101A1 (en) * 2019-05-29 2022-07-07 Jt International S.A. Cartridge for an Aerosol Generating Device
US20230054752A1 (en) * 2020-05-07 2023-02-23 Juul Labs, Inc. Vaporizer cartridge for heating more than one vaporizable material
WO2021233792A1 (fr) * 2020-05-22 2021-11-25 Jt International Sa Dispositif de génération d'aérosol
WO2022223707A1 (fr) * 2021-04-23 2022-10-27 Jt International Sa Article de génération d'aérosol et son procédé de fabrication, et système de génération d'aérosol
WO2022238338A1 (fr) * 2021-05-10 2022-11-17 Jt International S.A. Dispositif de génération d'aérosol comprenant deux éléments chauffants

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