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WO2024208721A1 - Ensemble chauffant pour un dispositif de génération d'aérosol - Google Patents

Ensemble chauffant pour un dispositif de génération d'aérosol Download PDF

Info

Publication number
WO2024208721A1
WO2024208721A1 PCT/EP2024/058461 EP2024058461W WO2024208721A1 WO 2024208721 A1 WO2024208721 A1 WO 2024208721A1 EP 2024058461 W EP2024058461 W EP 2024058461W WO 2024208721 A1 WO2024208721 A1 WO 2024208721A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating element
aerosol
heating
wicking
generating device
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/EP2024/058461
Other languages
English (en)
Inventor
Jérôme Christian COURBAT
Gérard Edmond ZUBER
Enrico TURRINI
Bo Jiang
Frédéric MATTHEY
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.)
Philip Morris Products SA
Original Assignee
Philip Morris Products 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 Philip Morris Products SA filed Critical Philip Morris Products SA
Priority to KR1020257032670A priority Critical patent/KR20250165359A/ko
Priority to CN202480021425.2A priority patent/CN120936264A/zh
Publication of WO2024208721A1 publication Critical patent/WO2024208721A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

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
    • A24F40/48—Fluid transfer means, e.g. pumps
    • A24F40/485—Valves; Apertures
    • 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
    • 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
    • A24F40/44—Wicks
    • 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
    • A24F40/10—Devices using liquid inhalable precursors

Definitions

  • the present invention relates to a heating assembly for an aerosol-generating device, to an aerosol-generating device, to a cartridge for an aerosol-generating device and to an aerosol-generating system comprising an aerosol-generating device and a cartridge.
  • Aerosol-generating device for generating an inhalable vapor.
  • Such devices may heat liquid aerosol-forming substrate to a temperature at which one or more components of the liquid aerosol-forming substrate are volatilised without burning the aerosolforming substrate.
  • Aerosol-forming substrate may be provided in liquid form in the liquid storage portion as part of a replaceable or refillable cartridge.
  • wicking elements have been employed for wicking the liquid aerosol-forming substrate towards the heating coil.
  • a heating assembly for an aerosol-generating device with improved wicking of the liquid aerosol-forming substrate to a heating element of the heating assembly. It would be desirable to have a heating assembly for an aerosol-generating device with improved airflow over a heating element of the heating assembly to improve entrainment of the volatilized liquid aerosol-forming substrate.
  • a heating assembly for an aerosol-generating device.
  • the heating assembly may comprise an airflow channel and a heating element.
  • the heating element may be arranged at least partially in the airflow channel or at least partly surrounding the airflow channel.
  • the heating element may comprise one or more through holes for allowing air that flows through the airflow channel to also flow through the heating element.
  • a heating assembly for an aerosol-generating device.
  • the heating assembly comprises an airflow channel and a heating element.
  • the heating element is arranged at least partially in the airflow channel or at least partly surrounding the airflow channel.
  • the heating element comprises one or more through holes for allowing air that flows through the airflow channel to also flow through the heating element.
  • Providing one or more through holes in the heating element and channelling the airflow through these through holes may improve the contact surface between the heating element and the air flowing through the airflow channel. This may improve energy efficiency during aerosol generation. This may improve a homogeneous generation of aerosol.
  • the airflow channel may run along or parallel to a longitudinal axis of the heating assembly.
  • the airflow channel may have a circular cross-section.
  • the airflow channel may have an elliptical or oval or rectangular cross-section.
  • a main extension axis of the heating element may be orthogonal to a main extension axis of the airflow channel.
  • the main extension axis of the airflow channel may be identical to the longitudinal axis of the heating assembly.
  • the main extension axis of the heating element may be perpendicular to the main extension axis of the airflow channel.
  • the heating element may at least partly surround the airflow channel.
  • the heating element may fully surround the airflow channel.
  • the heating element may be arranged directly abutting the airflow channel.
  • the heating element may at least partly form a sidewall of the airflow channel.
  • Air flowing through the airflow channel may directly contact the heating element when passing through the one or more through holes of the heating element.
  • the through hole of the heating element may be arranged centrally in the airflow channel.
  • An inner diameter of the through hole may correspond to an inner diameter of the airflow channel.
  • the inner diameter of the through hole may be smaller than the inner diameter of the airflow channel.
  • the cross-sectional shape of the through hole preferably corresponds to the cross- sectional shape of the airflow channel.
  • the heating element may be circular.
  • the heating element may have an annular shape.
  • the annular-shaped heating element surrounds the circular airflow channel.
  • the heating element may be ovoid-shaped.
  • the heating element may have an elliptic shape.
  • the heating element may be disk-shaped. Particularly preferred, the heating element has an annular disk shape.
  • the heating element may be rectangular.
  • the heating element may be planar.
  • the heating element may have a thickness.
  • the thickness may be between 10 micrometres and 250 micrometres, preferably between 15 micrometres and 100 micrometres and more preferably between 20 micrometres and 60 micrometres.
  • Each individual through hole through the heating element may have a diameter.
  • the diameter may be in the range of 0.5 millimeters to 3 millimeters, preferably between 0.7 millimeters to 2 millimeters. If only a single through hole is provided, the through hole may have a diameter ranging between 0.5 millimeters to 6 millimeters, preferably ranging from 1 millimeter to 3 millimeters and more preferably ranging from 1.5 millimeters to 2.5 millimeters.
  • a heated portion of the heating element may follow the perimeter of the single through hole.
  • the heating element may comprise multiple through holes that may be arranged in a regular pattern in the heating element.
  • the one or more through holes may be configured as slits.
  • the slits preferably have an extension axis that is orthogonal to the main extension axis of the airflow channel.
  • the heating element may comprise, preferably may consist of, a heating track.
  • the thickness of the heating track may be between 2 micrometres and 500 micrometres, more preferably between 4 micrometres and 100 micrometres.
  • the heating element may comprise a meandering heating track.
  • the meandering configuration may increase the overall resistance of the heating track.
  • the heating element may be covered by a protective layer.
  • the protective layer may comprise glass or may consist of glass.
  • the heating element may comprise a circular heating track.
  • the heating element may comprise at least two concentric heating tracks.
  • the heating element may comprise, preferably may consist of, resistive material.
  • the overall electrical resistance of the heating element may be between 0.1 Ohms and 5 Ohms and preferably between 0.3 Ohms and 2 Ohms.
  • the heating element may comprise, preferably may consist of, susceptor material.
  • the heating element may be made of stainless steel.
  • the heating element may be made of magnetic stainless steel.
  • the heating element may be made of AISI430 grade stainless steel or any type of magnetic material.
  • the meat heating element may comprise, preferably may consist of, a metal foil.
  • the heating element may have a thickness of between 2 micrometres and 500 micrometres and preferably between 4 micrometres and 100 micrometres.
  • the heating element may be configured as a detachable heating element.
  • the heating assembly may comprise a heating element holder.
  • the heating element holder may be configured to detachably hold the heating element.
  • the heating element holder may hold the heating element by means of one or more of: a screw connection, a snap fit connection, or any type of connection.
  • the heating element may be provided on a substrate layer.
  • the substrate layer may comprise glass.
  • the substrate layer may consist of glass.
  • the substrate layer may comprise one or more through holes.
  • the through holes of the substrate layer may be aligned with the through holes of the heating element.
  • the substrate layer may be made from a thermally insulating material.
  • the substrate layer may comprise ducts.
  • the substrate layer may be configured to wick liquid aerosol-forming substrate to the heating element. Hence, the substrate layer may at the same time be configured as a wicking layer.
  • the substrate layer may be an electrical insulator.
  • the substrate layer may have a low thermal conductivity.
  • the substrate layer may comprise, preferably consist of, a ceramic, a glass, a temperature resistant polymer, a silicon-based material, preferably Zirconia (Zirconium oxide).
  • the thickness of the substrate layer may be between 5 micrometres and 1000 micrometres and preferably between 30 micrometres and 400 micrometres.
  • the heating assembly may be held in a support structure of the aerosol-generating device.
  • the support structure may be configured removable. This may enable exchange of the support structure after a period of operations of the heater assembly of the aerosol-generating device.
  • the support structure may be irremovably fixed to the heating element.
  • the support structure may be connected to the heating element by different assembly methods: clamping with screws, clamping with snap fits, with adhesives or overmoulding.
  • the support structure may include one or more of a receptable to fix the disposable cartridges on its top side, an electrical connection to connect the heating assembly to a controller and a power supply and a fixation system to attach it to the aerosol-generating device.
  • the heating element may be arranged adjacent, preferably embedded in, a flux concentrator.
  • the heating assembly may further comprise a wicking element configured to wick liquid aerosol-forming substrate towards the heating element.
  • the wicking element may be arranged in direct contact with the heating element.
  • the wicking element may be arranged directly abutting the heating element.
  • the arrangement of the wicking element as described herein may improve the thermal contact between the liquid aerosol-forming substrate and the heating element.
  • the arrangement of the wicking element as described herein may enhance feeding of liquid aerosol-forming substrate to the heating element due to a reduction in viscosity of the liquid aerosol-forming substrate in the wicking element. This effect is particularly pronounced in the arrangement of the wicking element abutting or contacting the heating element.
  • the wicking element in direct contact with the heating element may be arranged proximal or distal of the heating element. Particularly preferred, the wicking element is arranged proximal of the heating element. The wicking element is preferably arranged on a proximal large surface of the heating element. On an opposite distal large surface of the wicking element, the substrate layer may be arranged.
  • the wicking element may have one or more through holes aligning with the one or more through holes of the heating element. This may enable air to be drawn through the airflow channel, through the through holes of the heating element and through the through holes of the wicking element.
  • the wicking element may be arranged at least partly surrounding a periphery of the heating element.
  • the wicking element may have an annular shape.
  • the wicking element may have an annular disk shape.
  • the wicking element may cover between 60% and 98% of a large surface of the heating element.
  • the wicking element may cover between 80% and 98% of the large surface of the heating element.
  • the wicking element may cover between 90% and 98% of the large surface of the heating element.
  • An edge, particularly an inner edge, of the wicking element may be radially distanced from an edge, particularly an inner edge, of the susceptor.
  • the distance between the wicking element and the susceptor may be between 0.3 mm and 5 mm, preferably between 0.5 mm and 3 mm, more preferably between 0.7 mm and 1.5 mm, most preferably 1 mm.
  • the wicking element may not cover a part of the large proximal surface of the heating element. This uncovered region may surround the through hole of the heating element. The rest of the large proximal surface of the heating element may be covered by the wicking element. When liquid aerosol-forming substrate is wicked towards the heating element via the wicking element, the liquid aerosol-forming substrate may primarily be vaporized in this uncovered region.
  • a partial covering of the heating element by the wicking element may lead to a meniscus of liquid aerosol-forming substrate being formed at the uncovered surface of the heating element not being covered by the wicking element.
  • This meniscus of liquid aerosolforming substrate may be vaporized by the heating element without being obstructed by the wicking element.
  • the wicking element may be provided as a coating on the heating element.
  • the wicking element may be arranged on the heating element.
  • the wicking element may be arranged on a first side of the heating element and the substrate layer may be arranged on a second opposite side of the heating element.
  • the wicking element may comprise, preferably may consist of, glass or ceramic material.
  • the wicking element may comprise, preferably may consist of, apolymeric material, such as but not limited to cotton, Kevlar or any felt or spongy material that can withstand a temperature of at least 200°C.
  • the wicking element may comprise, preferably may consist of, Kevlar or cotton. These materials may be beneficial from a toxicological point. These materials may easily conform to the shape of the heating element thereby preventing gaps between the wicking element and the heating element.
  • the wicking element may comprise one or more ducts configured for capillary wicking of liquid aerosol-forming substrate towards the heating element.
  • the heating element may comprise one or more ducts configured for capillary wicking of liquid aerosol-forming substrate towards the heating element.
  • the substrate layer may comprise one or more ducts configured for capillary wicking of liquid aerosol-forming substrate towards the heating element.
  • the ducts of one or more of the wicking element, the heating element and the substrate layer may be aligned.
  • the ducts of one or more of the wicking element, the heating element and the substrate layer may not intersect with the through holes of one or more of the wicking element, the heating element and the substrate layer.
  • the ducts may be configured as a network of ducts.
  • the term “duct” or “ducts” may refer to capillary channels or bores.
  • the ducts may be arranged in a regular geometric pattern such as a zigzag or checkerboard pattern.
  • the ducts may be arranged to run between the through holes of the heating element.
  • the ducts may be arranged to run between the through holes of the wicking element.
  • the ducts may be arranged to run between the through holes of the substrate layer.
  • the ducts may be arranged to supply liquid aerosol-forming substrate to the through holes of one or more of the wicking element, the heating element and the substrate layer.
  • the wicking element may be arranged to wick the liquid aerosol-forming substrate so as to create a meniscus of liquid aerosol-forming substrate between the wicking element and the heating element.
  • the invention further relates to an aerosol-generating device comprising a heating assembly as described herein.
  • the aerosol-generating device may comprise an airflow channel.
  • the airflow channel may be a central airflow channel.
  • the airflow channel of the aerosol-generating device may comprise the airflow channel of the heating assembly.
  • the aerosol-generating device may comprise an air inlet.
  • a cartridge as described herein may comprise the air inlet.
  • the air inlet may be arranged to allow ambient air to be drawn into the airflow channel of the aerosol-generating device or the cartridge, respectively.
  • the airflow channel may comprise an inner diameter.
  • the inner diameter may be between 1.5 millimeters and 8 millimeters, preferably between 2 millimeters and 6 millimeters and more preferably between 3 millimeters and 5 millimeters.
  • the aerosol-generating device may comprise a first air inlet configured for drawing ambient air into a central portion of the airflow channel.
  • the aerosol-generating device may comprise a second air inlet configured for drawing ambient air radially over the heating element.
  • the first air inlet may be arranged at a distal end of the aerosol-generating device.
  • the second air inlet may be arranged at a lateral side wall of the aerosol-generating device.
  • the first air inlet may be fluidly connected with the airflow channel.
  • the second air inlet may be fluidly connected with the airflow channel.
  • An airflow path connecting the first air inlet with the airflow channel and an airflow path connecting the second air inlet with the airflow channel may merge at or near the heating assembly, preferably at or near the through hole of the heating element of the heating assembly.
  • the airflow channel may comprise a first portion fluidly connecting the first air inlet with the heating assembly and the airflow channel may comprise a second portion fluidly connecting the second air inlet with the heating assembly.
  • the first portion of the airflow channel may be arranged along or parallel to the longitudinal axis of the aerosol-generating device.
  • the second portion of the airflow channel may run along or parallel a transverse axis of the aerosol-generating device.
  • the first portion of the airflow channel and the second portion of the airflow channel may merge at or near the heating element, more preferably at or near the through hole of the heating element of the heating assembly.
  • a main extension axis of the first air inlet may run along or parallel to the longitudinal axis of the aerosol-generating device.
  • a main extension axis of the second air inlet may run along or parallel a transverse axis of the aerosol-generating device.
  • the main extension axis of the second air inlet may be parallel to the main extension axis of the heating element.
  • Ambient air being drawn over the heating element via the second air inlet may improve directing heat away from the heating element. Overheating of the heating element may thus be avoided.
  • the aerosol-generating device may comprise an induction coil.
  • the induction coil may be arranged to create an alternating magnetic field.
  • the induction coil may be arranged such that the heating assembly, more particularly the heating element of the heating assembly, is subjected to the alternating magnetic field.
  • the heating element may be an inductive heating element.
  • the heating element may be heated by induced eddy currents in the heating element due to being subjected to the alternating magnetic field of the induction coil.
  • the inductive heating element may comprise the flux concentrator.
  • the inductive heating element may be embedded in the flux concentrator.
  • the flux concentrator may be configured to concentrate the alternating magnetic field towards the heating element.
  • the flux concentrator may be configured to concentrate the alternating magnetic field towards a specific area of the heating element.
  • Such a configuration may allow localized heating of the susceptor and therefore localized heating of the wicking element comprising aerosol-forming substrate.
  • the flux concentrator may allow efficient heating of the aerosol-forming substrate.
  • the flux concentrator may be configured to shield the alternating magnetic field from external perturbations.
  • the induction coil may be made from copper, or silver, or gold or any material with a high electrical conductivity.
  • the wire of the induction coil may have a cross-sectional shape.
  • the cross-sectional shape of the wire may be circular, or ovoid or square or any other shape.
  • the cross-sectional shape of the wire may preferably be rectangular.
  • the induction coil may have more than one winding.
  • the induction coil may have between one and five windings, preferably between 1.5 and 4 winding and more preferably between 1 .7 and 3.5 windings, most preferably 2.5 windings.
  • the induction coil may have two windings.
  • the induction coil may have three windings.
  • the flux concentrator may be made of a material with a high relative magnetic permeability above 1 MHz and a low coercivity.
  • the flux concentrator may be made of ferrite, preferably made of nickel-zinc ferrite.
  • the flux concentrator may have a U-shape revolving around its central axis.
  • the induction coil may be arranged in the U-shaped flux concentrator.
  • the flux concentration may be located in the center of the induction coil.
  • the flux concentrator may have a rod shape, or a pin shape or tip shape or any other shape.
  • the flux concentrator may consist in an almost closed loop with a flat edge or tapered edge to increase the magnetic flux strength.
  • the flux concentrator may have a hole in its center along its longitudinal. This may be beneficial for providing air connection from the air flow channel to a puff sensor.
  • a gap may be provided between the heating element of the heating assembly and the induction coil.
  • the gap may be may be between 0.1 millimeters and 2 millimeters, preferably between 0.3 millimeters to 1.5 millimeters, and more preferably between 0.4 millimeters and 1.1 millimeters. Such a gap may ensure good energy transfer from the induction coil to the heating element. This gap may ensure an electrical quality factor between 5 and 10.
  • the invention further relates to a cartridge for an aerosol-generating device, wherein the cartridge may comprise: a liquid storage portion for holding liquid aerosol-forming substrate; and a wicking element, wherein the wicking element may be fluidly connected with the liquid storage portion to enable wicking of the liquid aerosol-forming substrate, wherein the wicking element may be configured as described herein.
  • the invention further relates to a cartridge for an aerosol-generating device, wherein the cartridge comprises: a liquid storage portion for holding liquid aerosol-forming substrate; and a wicking element, wherein the wicking element is fluidly connected with the liquid storage portion to enable wicking of the liquid aerosol-forming substrate, wherein the wicking element is configured as described herein.
  • the wicking element is part of the cartridge and comes into contact with the heating assembly of the aerosol-generating device when the cartridge is attached to the aerosol-generating device. Then, the wicking element is configured to wick liquid aerosolforming substrate to the heating element of the heating assembly.
  • the wicking element may be an integral part of the heating assembly of the aerosol-generating device.
  • the heating assembly including the wicking element may be part of the cartridge.
  • the cartridge may comprise a valve connected to the liquid storage portion.
  • the valve may be configured as a one-way valve.
  • the valve may be configured to enable a wicking of the liquid aerosol-forming substrate from the liquid storage portion to the wicking element, when the liquid storage portion is fluidly connected with the wicking element.
  • the aerosol-forming substrate may contain up to 3 milliliters of liquid, preferably up to 2 milliliters of liquid.
  • the cartridge may be attached to the susceptor body by screwing, snap fit, or any type of attachment technique.
  • the cartridge may comprise a first liquid storage portion.
  • the first liquid storage portion may comprise a first liquid aerosol-forming substrate.
  • the cartridge may further comprise a second liquid storage portion.
  • the second liquid storage portion may comprise a second liquid aerosol-forming substrate.
  • the first liquid aerosol-forming substrate may be different from the second liquid aerosol-forming substrate.
  • the first aerosol-forming substrate may comprise nicotine while the second aerosol-forming substrate may comprise a flavourant. If a modified aerosol is desired, it may be sufficient to exchange the first aerosol-forming substrate or the second aerosol-forming substrate, respectively.
  • different aerosol-forming substrates may have one or more of different viscosities, different wicking properties and different vaporization properties. It may therefore be undesired to mix these different aerosol-forming substrates and to store, wick and vaporize them together. With the present invention, it may be possible to one or more of improve storing, wicking and vaporization of the individual aerosol-forming substrates.
  • the first liquid storage portion may be spatially separated from the second liquid storage portion.
  • the first liquid aerosol-forming substrate may comprise nicotine.
  • the first liquid aerosol-forming substrate may comprise one or more of: free-base nicotine, a nicotine salt, a mixture of nicotine salts, a mixture of free-base nicotine and one or more nicotine salts.
  • the second liquid aerosol-forming substrate may comprise a flavourant.
  • the second liquid aerosol-forming substrate may comprise a solvent or a mixture of solvents and a flavourant.
  • the first liquid storage portion may have a different volume for holding the first liquid aerosol-forming substrate than the volume of the second liquid storage portion for holding the second liquid aerosol-forming substrate.
  • the cartridge may further comprise a first wicking element fluidly connected with the first liquid storage portion.
  • the cartridge may further comprise a second wicking element fluidly connected with the second liquid storage portion.
  • the first wicking element may comprise a first delivery portion configured to deliver the first liquid aerosol-forming substrate to a heating element.
  • the second wicking element may comprise a second delivery portion configured to deliver the second liquid aerosol-forming substrate to a heating element.
  • One or both of a main surface area of the first delivery portion may be planar and a main surface area of the second delivery portion may be planar.
  • a main surface area of the first delivery portion may be different from a main surface area of the second delivery portion.
  • the first wicking element may have a partly annular ring shape.
  • the second wicking element may have a partly annular ring shape.
  • the first wicking element may be arranged fluidly separate from the second wicking element.
  • the cartridge may further comprise a central airflow channel.
  • the first wicking element may be fluidly connected with the central airflow channel.
  • the second wicking element may be fluidly connected with the central airflow channel.
  • the central airflow channel may comprise a separation wall separating the central airflow channel along a full length or along a partial length of the central airflow channel into a first portion of the central airflow channel and a fluidity separate second portion of the central airflow channel.
  • the first wicking element may be fluidly connected with the first portion of the central airflow channel and the second wicking element may be fluidly connected with the second portion of the central airflow channel.
  • the cross-sectional surface area of the first portion of the central airflow channel may be different from the cross-sectional surface area of the second portion of the central airflow channel.
  • the separating wall may extend along a central longitudinal axis of the cartridge.
  • the central airflow channel may extend along a central longitudinal axis of the cartridge.
  • the first liquid storage portion may be configured detachable from the cartridge.
  • the second liquid storage portion may be configured detachable from the cartridge.
  • the invention further relates to an aerosol-generating system comprising an aerosolgenerating device as described herein and a cartridge as described herein.
  • Providing aerosol-generating device and a replaceable cartridge holding the liquid aerosol-forming substrate may improve sustainability due to separating the replaceable liquid aerosol-forming substrate from the components of the aerosol-generating device.
  • the components of the aerosol-generating device can be used for a prolonged period.
  • proximal As used herein, the terms ‘proximal’, ‘distal’, ‘downstream’ and ‘upstream’ are used to describe the relative positions of components, or portions of components, of the aerosolgenerating device in relation to the direction in which a user draws on the aerosol-generating device during use thereof.
  • the aerosol-generating device may comprise a mouth end through which in use an aerosol exits the aerosol-generating device and is delivered to a user.
  • the mouth end may also be referred to as the proximal end.
  • a user draws on the proximal or mouth end of the aerosol-generating device in order to inhale an aerosol generated by the aerosolgenerating device.
  • a user may directly draw on an aerosol-generating article inserted into an opening at the proximal end of the aerosol-generating device.
  • the opening at the proximal end may be an opening of the cavity.
  • the cavity may be configured to receive the aerosol-generating article.
  • the aerosol-generating device comprises a distal end opposed to the proximal or mouth end.
  • the proximal or mouth end of the aerosol-generating device may also be referred to as the downstream end and the distal end of the aerosol-generating device may also be referred to as the upstream end.
  • Components, or portions of components, of the aerosol-generating device may be described as being upstream or downstream of one another based on their relative positions between the proximal, downstream or mouth end and the distal or upstream end of the aerosol-generating device.
  • an ‘aerosol-generating device’ relates to a device that interacts with an aerosol-forming substrate to generate an aerosol.
  • the aerosol-forming substrate may be part of an aerosol-generating article, for example part of a smoking article.
  • An aerosol-generating device may be a smoking device that interacts with an aerosol-forming substrate of an aerosolgenerating article to generate an aerosol that is directly inhalable into a user’s lungs thorough the user's mouth.
  • An aerosol-generating device may be a holder.
  • the device may be an electrically heated smoking device.
  • the aerosol-generating device may comprise a housing, electric circuitry, a power supply, a heating chamber and a heating element.
  • the term ‘smoking’ with reference to a device, article, system, substrate, or otherwise does not refer to conventional smoking in which an aerosol-forming substrate is fully or at least partially combusted.
  • the aerosol-generating device of the present invention is arranged to heat the aerosol-forming substrate to a temperature below a combustion temperature of the aerosol-forming substrate, but at or above a temperature at which one or more volatile compounds of the aerosol-forming substrate are released to form an inhalable aerosol.
  • the aerosol-generating device may comprise electric circuitry.
  • the electric circuitry may comprise a microprocessor, which may be a programmable microprocessor.
  • the microprocessor may be part of a controller.
  • the electric circuitry may comprise further electronic components.
  • the electric circuitry may be configured to regulate a supply of power to the heating element. Power may be supplied to the heating element continuously following activation of the aerosol-generating device or may be supplied intermittently, such as on a puff- by-puff basis. The power may be supplied to the heating element in the form of pulses of electrical current.
  • the electric circuitry may be configured to monitor the electrical resistance of the heating element, and preferably to control the supply of power to the heating element dependent on the electrical resistance of the heating element.
  • the aerosol-generating device may comprise a power supply, typically a battery, within a main body of the aerosol-generating device.
  • the power supply is a Lithium-ion battery.
  • the power supply may be a Nickel-metal hydride battery, a Nickel cadmium battery, or a Lithium based battery, for example a Lithium-Cobalt, a Lithium- Iron-Phosphate, Lithium Titanate or a Lithium-Polymer battery.
  • the power supply may be another form of charge storage device such as a capacitor.
  • the power supply may require recharging and may have a capacity that enables to store enough energy for one or more usage experiences; for example, the power supply may have sufficient capacity to continuously generate aerosol for a period of around six minutes or for a period of a multiple of six minutes. In another example, the power supply may have sufficient capacity to provide a predetermined number of puffs or discrete activations of the heating element.
  • the cavity of the aerosol-generating device may have an open end into which the aerosol-generating article is inserted.
  • the open end may be a proximal end.
  • the cavity may have a closed end opposite the open end.
  • the closed end may be the base of the cavity.
  • the closed end may be closed except for the provision of air apertures arranged in the base.
  • the base of the cavity may be flat.
  • the base of the cavity may be circular.
  • the base of the cavity may be arranged upstream of the cavity.
  • the open end may be arranged downstream of the cavity.
  • the cavity may have an elongate extension.
  • the cavity may have a longitudinal central axis.
  • a longitudinal direction may be the direction extending between the open and closed ends along the longitudinal central axis.
  • the longitudinal central axis of the cavity may be parallel to the longitudinal axis of the aerosol-generating device.
  • the cavity may be configured as a heating chamber.
  • the cavity may have a cylindrical shape.
  • the cavity may have a hollow cylindrical shape.
  • the cavity may have a shape corresponding to the shape of the aerosol-generating article to be received in the cavity.
  • the cavity may have a circular cross-section.
  • the cavity may have an elliptical or rectangular crosssection.
  • the cavity may have an inner diameter corresponding to the outer diameter of the aerosol-generating article.
  • An airflow channel may run through the cavity. Ambient air may be drawn into the aerosol-generating device, into the cavity and towards the user through the airflow channel. Downstream of the cavity, a mouthpiece may be arranged or a user may directly draw on the aerosol-generating article.
  • the airflow channel may extend through the mouthpiece.
  • the heating assembly is preferably, as described herein, arranged in or adjacent the airflow channel.
  • the heating element may comprise an electrically resistive material.
  • Suitable electrically resistive materials include but are not limited to: semiconductors such as doped ceramics, electrically "conductive" ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys and composite materials made of a ceramic material and a metallic material.
  • Such composite materials may comprise doped or undoped ceramics.
  • suitable doped ceramics include doped silicon carbides.
  • suitable metals include titanium, zirconium, tantalum platinum, gold and silver.
  • suitable metal alloys include stainless steel, nickel-, cobalt-, chromium-, aluminium- titanium- zirconium-, hafnium-, niobium-, molybdenum-, tantalum-, tungsten-, tin-, gallium-, manganese-, gold- and iron-containing alloys, and super-alloys based on nickel, iron, cobalt, stainless steel, Timetai® and iron-manganese-aluminium based alloys.
  • the electrically resistive material may optionally be embedded in, encapsulated or coated with an insulating material or vice-versa, depending on the kinetics of energy transfer and the external physicochemical properties required.
  • the heating element may be part of an aerosol-generating device.
  • the aerosol-generating device may comprise an internal heating element or an external heating element, or both internal and external heating elements, where “internal” and “external” refer to the aerosol-forming substrate.
  • An internal heating element may take any suitable form.
  • the electrically resistive heating element may be formed using a metal having a defined relationship between temperature and resistivity.
  • the metal may be formed as a track on a suitable insulating material, such as ceramic material, and then sandwiched in another insulating material, such as a glass. Heaters formed in this manner may be used to both heat and monitor the temperature of the heating elements during operation.
  • the heating element may be configured as an induction heating element.
  • the induction heating element may comprise an induction coil and a susceptor.
  • the heating element as described herein may be the susceptor.
  • a susceptor is a material that is capable of generating heat, when penetrated by an alternating magnetic field. When located in an alternating magnetic field. If the susceptor is conductive, then typically eddy currents are induced by the alternating magnetic field. If the susceptor is magnetic, then typically another effect that contributes to the heating is commonly referred to hysteresis losses.
  • Hysteresis losses occur mainly due to the movement of the magnetic domain blocks within the susceptor, because the magnetic orientation of these will align with the magnetic induction field, which alternates. Another effect contributing to the hysteresis loss is when the magnetic domains will grow or shrink within the susceptor. Commonly all these changes in the susceptor that happen on a nano-scale or below are referred to as “hysteresis losses,” because they produce heat in the susceptor. Hence, if the susceptor is both magnetic and electrically conductive, both hysteresis losses and the generation of eddy currents will contribute to the heating of the susceptor.
  • the susceptor may be electrically conductive or magnetic or both electrically conductive and magnetic.
  • An alternating magnetic field generated by one or several induction coils heat the susceptor, which then transfers the heat to the aerosol-forming substrate, such that an aerosol is formed.
  • the heat transfer may be mainly by conduction of heat. Such a transfer of heat is best, if the susceptor is in close thermal contact with the aerosol-forming substrate.
  • an aerosol-generating article refers to an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol.
  • an aerosol-generating article may be a smoking article that generates an aerosol that is directly inhalable into a user’s lungs through the user's mouth.
  • An aerosolgenerating article may be disposable.
  • aerosol-forming substrate relates to a substrate capable of releasing one or more volatile compounds that can form an aerosol. Such volatile compounds may be released by heating the aerosol-forming substrate.
  • An aerosol-forming substrate may conveniently be part of an aerosol-generating article or smoking article.
  • Example ex1 A heating assembly for an aerosol-generating device, wherein the heating assembly comprises: an airflow channel, and a heating element, wherein the heating element is arranged at least partially in the airflow channel or at least partly surrounding the airflow channel, wherein the heating element comprises one or more through holes for allowing air that flows through the airflow channel to also flow through the heating element.
  • Example ex2 The heating assembly according to example ex1 , wherein a main extension axis of the heating element is orthogonal to a main extension axis of the airflow channel.
  • Example ex3 The heating assembly according to any of the preceding examples, wherein the through hole of the heating element is arranged centrally in the airflow channel.
  • Example ex4 The heating assembly according to any of the preceding examples, wherein the heating element is circular.
  • Example ex5. The heating assembly according to any of the preceding examples, wherein the heating element is disk-shaped.
  • Example ex6 The heating assembly according to any of the preceding examples, wherein the heating element is rectangular.
  • Example ex7 The heating assembly according to any of the preceding examples, wherein the heating element is planar.
  • Example ex8 The heating assembly according to any of the preceding examples, wherein the heating element comprises multiple through holes that are arranged in a regular pattern in the heating element.
  • Example ex9 The heating assembly according to any of the preceding examples, wherein the one or more through holes are configured as slits.
  • Example ex10 The heating assembly according to any of the preceding examples, wherein the heating element comprises, preferably consists of, a heating track, preferably wherein the thickness of the heating track is between 2 micrometres and 500 micrometres, more preferably between 4 micrometres and 100 micrometres.
  • Example ex11 The heating assembly according to any of the preceding examples, wherein the heating element comprises a meandering heating track.
  • Example ex12 The heating assembly according to any of the preceding examples, wherein the heating element comprises at least two concentric heating tracks.
  • Example ex13 The heating assembly according to any of the preceding examples, wherein the heating element comprises, preferably consists of, susceptor material.
  • Example ex14 The heating assembly according to any of the preceding examples, wherein the heating element comprises, preferably consists of, resistive material.
  • Example ex15 The heating assembly according to any of the preceding examples, wherein the heating element is configured as a detachable heating element.
  • Example ex16 The heating assembly according to any of the preceding examples, wherein the heating element is arranged on a substrate layer, preferably wherein the protective layer comprises glass, preferably wherein the protective layer consists of glass.
  • Example ex17 The heating assembly according to any of the preceding examples, wherein the heating element is arranged adjacent, preferably embedded in, a flux concentrator.
  • Example ex18 The heating assembly according to any of the preceding examples, wherein the heating assembly further comprises a wicking element configured to wick liquid aerosol-forming substrate towards the heating element.
  • Example ex19 The heating assembly according to example ex18, wherein the wicking element is arranged in direct contact with the heating element.
  • Example ex20 The heating assembly according to example ex19, wherein the wicking element in direct contact with the heating element is arranged proximal or distal of the heating element.
  • Example ex21 The heating assembly according to any of examples ex18 to ex20, wherein the wicking element has one or more through holes aligning with the one or more through holes of the heating element.
  • Example ex22 The heating assembly according to any of examples ex18 to ex21 , wherein the wicking element is arranged at least partly surrounding a periphery of the heating element.
  • Example ex23 The heating assembly according to any of examples ex18 to ex22, wherein the wicking element has an annular shape.
  • Example ex24 The heating assembly according to any of examples ex18 to ex23, wherein the wicking element is provided as a coating on the heating element, wherein the wicking element is preferably arranged on the heating element, wherein the wicking element is more preferably arranged on a first side of the heating element and the substrate layer is arranged on a second opposite side of the heating element.
  • Example ex25 The heating assembly according to any of examples ex18 to ex24, wherein the wicking element comprises, preferably consists of, glass or ceramic material.
  • Example ex26 An aerosol-generating device comprising a heating assembly according to any of examples ex1 to ex25.
  • Example ex27 The aerosol-generating device according to example ex26, wherein the aerosol-generating device comprises a first air inlet configured for drawing ambient air into a central portion of the airflow channel, and wherein the aerosol-generating device comprises a second air inlet configured for drawing ambient air radially over the heating element.
  • Example ex28 A cartridge for an aerosol-generating device, wherein the cartridge comprises: a liquid storage portion for holding liquid aerosol-forming substrate; and a wicking element, wherein the wicking element is fluidly connected with the liquid storage portion to enable wicking of the liquid aerosol-forming substrate, wherein the wicking element is configured according to any of examples ex18 to ex25.
  • Example ex29 An aerosol-generating system comprising an aerosol-generating device according to example ex26 or ex27 and a cartridge according to example ex28. Features described in relation to one embodiment may equally be applied to other embodiments of the invention.
  • Fig. 1 shows a cross-sectional side view of an aerosol-generating device
  • Fig. 2 shows a cross-sectional side of a heating assembly of the aerosol-generating device
  • Fig. 3 shows a top view of an embodiment of the heating assembly
  • Fig. 4 shows a top view of an embodiment of the heating assembly
  • Fig. 5 shows a top view of an embodiment of the heating assembly
  • Fig. 6 shows a cross-sectional side view of the embodiment of the heating assembly of Figure 5
  • Fig. 7 shows a top view of an embodiment of the heating assembly
  • Fig. 8 shows a cross-sectional exploded side view of an embodiment of the aerosolgenerating device, a cartridge and the heating assembly
  • Fig. 9 shows the elements of Fig. 8 in an assembled state
  • Fig. 10 shows a vaporization area of Fig. 9 in more detail
  • Figs. 11 A to 11 F show multiple embodiments of the induction coil and of the flux concentrator
  • Figs. 12A to 12C show multiple embodiments of resistive heating elements
  • Fig. 13 shows a support structure of the heating assembly
  • Fig. 14 shows the operation of the heating assembly in the embodiment of Fig. 13, and Fig. 15 shows the individual components of the cartridge, the support structure holding the heating assembly and the main body of the aerosol-generating device.
  • FIG. 1 shows an aerosol-generating device 10.
  • the aerosol-generating device 10 comprises a heating assembly 12.
  • the heating assembly 12 is arranged in direct contact with an airflow channel 14.
  • the airflow channel 14 is fluidly connected with an air inlet 16.
  • the air inlet 16 is arranged in a lateral side wall of the aerosol-generating device 10.
  • the air inlet 16 is arranged upstream of the heating assembly 12.
  • the air inlet 16 allows ambient air to be laterally drawn into the aerosol-generating device 10 and towards the heating assembly 12. As described herein, the air will subsequently flow through a heating element 38 of the heating assembly 12, through the airflow channel 14 and out of an air outlet 18.
  • the airflow channel 14 also fluidly connected with the air outlet 18.
  • the air outlet 18 is arranged downstream and proximal of the heating assembly 12.
  • the aerosol-generating device 10 further comprises a liquid storage portion 20 comprising liquid aerosol-forming substrate.
  • the liquid storage portion 20 is fluidly connected with the heating assembly 12.
  • the liquid aerosol-forming substrate is wicked towards the heating assembly 12 and vaporized by the hearing assembly.
  • the vaporized aerosol-forming substrate is entrained in the air flowing through the heating assembly 12. Further downstream in the airflow channel 14, the air cools down such that droplets of aerosol-forming substrate forms in the airflow thereby generating an inhalable aerosol.
  • the liquid storage portion 20 is part of a replaceable cartridge 22.
  • the cartridge 22 can be replaced after depletion of the liquid aerosol-forming substrate.
  • the cartridge 22 preferably only comprises the liquid storage portion 20 and an airflow channel 14.
  • the aerosol-generating device 10 further comprises a main body 24.
  • the cartridge 22 is removably attachable to the main body 24 of the aerosol-generating device 10.
  • the main body 24 comprises the heating assembly 12.
  • the main body 24 further comprises a power supply 26 in the form of a battery for powering the heating assembly 12.
  • a controller 28 is provided for controlling operation of the aerosol-generating device 10, particularly for controlling supply of electrical energy from the power supply 26 to the heating assembly 12.
  • a puff sensor 30 is provided for detecting a puff of a user. In response to the detection of a puff, the controller 28 controls supply of electrical energy from the power supply 26 to the heating assembly 12 so as to vaporize liquid aerosol-forming substrate from the liquid storage portion 20.
  • FIG. 2 shows a more detailed view of the heating assembly 12.
  • a through hole 32 is provided in the heating assembly 12 to allow airflow 34 through the heating assembly 12.
  • the air flows along a longitudinal axis of the aerosol-generating device 10 from a distal direction towards a proximal direction through the heating assembly 12.
  • liquid aerosol-forming substrate 36 is wicked towards the heating assembly 12 from the liquid storage portion 20 in a lateral direction.
  • FIG 3 shows a top view of an embodiment of the heating assembly 12.
  • the heating assembly 12 of this embodiment is configured as an induct 40ion heating assembly 12.
  • the heating assembly 12 comprises a heating element 38.
  • the heating element 38 is configured as a susceptor.
  • the heating element 38 is heated by being subjected to an alternating magnetic field.
  • the alternating magnetic field is created by an induction coil 54 of the aerosolgenerating device 10.
  • the induction coil 54 is arranged at least partly surrounding the heating element 38.
  • a multitude of through holes 32 is provided in this embodiment instead of the single through hole 32 of as shown in Figure 2.
  • ducts 40 are provided in a substrate layer 42 of the heating element 38.
  • the substrate layer 42 of the heating assembly 12 is preferably made of glass.
  • the substrate layer 42 creates dimensional stability of the heating assembly 12. Further, the substrate layer 42 enables a formation of the ducts 40 in the substrate layer 42 and thus may act as a wicking element 46.
  • the ducts 40 in the substrate layer 42 extend in the susceptor to enable wicking of the liquid aerosol-forming substrate from the liquid storage portion 20 towards the heating element 38.
  • the ducts 40 have a lateral extension for wicking the liquid aerosol-forming substrate from the liquid storage portion 20 towards the through holes 32 of in the heating element 38.
  • the liquid aerosolforming substrate is vaporized, by the heating element 38, in the periphery of the through holes 32.
  • the air flowing through the through holes 32 can entrain the vaporized aerosol-forming substrate to form an aerosol downstream.
  • the substrate layer 42 and the ducts 40 may have a contact area 44 where the substrate layer 42 and the ducts 40 contact the liquid storage portion 20.
  • the contact area 44 is laterally distanced from the heating element 38.
  • a valve may be provided to supply liquid aerosol-forming substrate to the ducts 40 only when the liquid aerosol-forming substrate in the ducts 40 is depleted and thus a negative pressure created in the ducts 40. This may prevent leakage of liquid aerosolforming substrate.
  • Figure 4 shows a top view of a further embodiment of the heating assembly 12.
  • This embodiment shares many similarities with the embodiment shown in Figure 3.
  • the through holes 32 in this embodiment are configured as slits.
  • the through holes 32 have a circular cross-section.
  • the ducts 40 have a U-shaped configuration to enable supply of the liquid aerosol-forming substrate from the liquid storage portion 20 to the slip-shaped through holes 32.
  • FIG. 5 shows a top view of a further embodiment of the heating assembly 12.
  • a separate wicking element 46 is coated onto the heating element 38.
  • the wicking element 46 is coated onto a proximal or downstream large surface of the heating element 38.
  • the substrate layer 42 is arranged at an opposite distal large surface of the heating element 38 (similar to the embodiments shown in Figures 3 and 4).
  • the wicking element 46 does not extend laterally towards the liquid storage portion 20.
  • the liquid aerosol-forming substrate substate is wicked by means of ducts 40 in the substrate layer 42 from the liquid storage portion 20 to towards the wicking element 46 and the heating element 38.
  • through holes 32 are arranged in the substrate layer 42 and in the heating element 38 to allow airflow through the heating assembly 12. These through holes 32 also extend through the wicking element 46. The through holes 32 in the substrate layer 42, in the heating element 38 and in the wicking element 46 are aligned with each other.
  • Figure 6 shows a cross-sectional side view of the embodiment of the heating assembly 12 of Figure 5. This figure clearly shows the alignment of the through holes 32 in the substrate layer 42, in the heating element 38 and in the wicking element 46. Further, the lateral supply of the liquid aerosol-forming substrate from the liquid storage portion 20 towards the wicking element 46 by means of the ducts 40 in the substrate layer 42 is depicted.
  • FIG. 7 shows a top view of an embodiment of the heating assembly 12.
  • the vaporization of the liquid aerosol-forming substrate is depicted in case of a wicking element 46 being arranged on the heating element 38.
  • a single though hole is shown in the heating element 38. This may apply to embodiments in which the heating element 38 only comprises a single through hole 32 or it may apply to embodiments with multiple through holes 32 (in which case the working principle for a single through hole 32 is indicated in Figure 7).
  • the heating element 38 surrounds the through hole 32.
  • the heating element 38 may have an annular shape.
  • the wicking element 46 is arranged on top of the heating element 38.
  • the wicking element 46 may also have an annular shape.
  • an inner diameter of the through hole 32 of the heating element 38 is smaller than an inner diameter of the through hole 32 of the wicking element 46.
  • an uncovered region 48 of the heating element 38 is formed in which no wicking element 46 is present.
  • the liquid aerosol-forming substrate wicked by the wicking element 46 towards the heating element 38 forms a meniscus of liquid aerosol-forming substrate in the area of the uncovered region 48.
  • the heating of the heating element 38 vaporized the liquid aerosol-forming substrate in the area of the uncovered region 48 such that the wicking element 46 does not obstruct the vaporized aerosol-forming substrate from being entrained in the airflow 34 through the through hole 32.
  • the temperature of the heating element 38 may be highest in the periphery of the through hole 32 thereby vaporizing the liquid aerosol-forming substrate.
  • FIG 8 shows a cross-sectional exploded side view of an embodiment of the aerosolgenerating device 10, of the cartridge 22 and of the heating assembly 12.
  • the heating element 38 is configured removable as part of a susceptor body 50.
  • the heating element 38 (and preferably the substrate layer 42 not shown in Figure 8) is held by a susceptor holder 52.
  • the susceptor body 50 further comprises the air inlet 16.
  • the susceptor body 50 is sandwiched between the cartridge 22 and the main body 24 of the aerosol-generating device 10.
  • the main body 24 of the aerosol-generating device 10 comprises an induction coil 54 at least partly surrounded by a flux concentrator 56.
  • the flux concentrator 56 in this embodiment has a U-shape to concentrate the alternating magnetic field created by the induction coil 54 towards the heating element 38.
  • the wicking element 46 is arranged as part of the cartridge 22.
  • the wicking element 46 is fluidly connected with the liquid storage portion 20 of the cartridge 22.
  • the wicking element 46 contacts the heating element 38 so as to supply the liquid aerosol-forming substrate from the liquid storage portion 20 to the heating element 38.
  • Figure 9 shows the elements of Figure 8 in an assembled state. Particularly, Figure 9 shows how ambient air is drawn into the aerosol-generating device 10 through the air inlet 16. The air flows over the heating element 38 and through the through hole 32 of the heating assembly 12.
  • Figure 9 further shows a vaporization area 60 where a meniscus 62 of liquid aerosol-forming substrate (shown in more detail in below Figure 10) in the uncovered region 48 and next to the wicking element 46 is vaporized.
  • FIG 10 shows the vaporization area 60 of Figure 9 in more detail.
  • Liquid aerosolforming substrate is wicked, by the wicking element 46, towards the uncovered region 48 of the heating element 38.
  • the meniscus 62 of liquid aerosol-forming substrate is formed.
  • This liquid aerosol-forming substrate is subsequently vaporized by the heating of the heating element 38 as indicated by reference sign 64.
  • Figure 11 shows multiple embodiments of the induction coil 54 and of the flux concentrator 56.
  • Figure 11 A shows the induction coil 54 having a circular cross-section shape.
  • Alternative rectangular cross-sectional shapes of the induction coil 54 are shown in Figures 11 B to 11 F.
  • Figures 11 A to 11 C show the flux concentrator 56 having a U-shape.
  • Figure 11 D shows a central pin-shaped flux concentrator 56.
  • Figures 11 E and 11 F show flux concentrator 56s essentially enclosing the induction coil 54 apart from proximal openings.
  • Figures 12A to 12C show multiple embodiments of resistive heating elements 38.
  • Figure 12A shows an embodiment of the heating element 38, in which the heating element 38 is configured as a resistive heating track.
  • the resistive heating track has a circular shape surrounding the through hole 32.
  • the resistive heating track is arranged on a substrate layer 42.
  • Figure 12B shows an embodiment of the heating element 38, in which the heating element 38 is configured as a resistive heating track having a meandering shape.
  • Figure 12C shows an embodiment of the heating element 38, in which the heating element 38 is configured as a resistive heating track having two concentric heating tracks.
  • Figure 13 shows a support structure 66 of the heating assembly 12.
  • This support structure 66 is beneficial if the heating element 38 is configured as a detachable component sandwiched between the cartridge 22 and the main body 24 of the aerosol-generating device 10.
  • the support structure 66 comprises a cartridge receptacle 68 enabling a cartridge 22 to be attached to the support structure 66.
  • the heating assembly 12 is also held by the support structure 66.
  • the cartridge 22 can be attached to a proximal portion of the support structure 66.
  • the support structure 66 comprises a connection portion 70.
  • the connection portion 70 is configured to connect the support structure 66 with the main body 24 of the aerosol-generating device 10.
  • Figure 14 shows the operation of the heating assembly 12 in the embodiment of Figure 13.
  • the liquid aerosol-forming substrate is wicked towards the heating element 38.
  • the heating element 38 is held by the support structure 66.
  • the meniscus of liquid aerosol-forming substrate formed at the uncovered region 48 of the heating element 38 is vaporized and entrained in the airflow through the heating assembly 12.
  • the airflow is depicted coming from a proximal direction instead of a lateral airflow as shown in the embodiment of Figures 8 and 9.
  • Figure 15 shows the individual components of the cartridge 22, the support structure
  • the support structure 66 enables to remove and replace the heating assembly 12. Further, the support structure 66 enables to removably attach a cartridge 22.
  • the cartridge 22 is preferably replaced after depletion of the liquid aerosol-forming substrate held in the liquid storage portion 20 of the cartridge 22.

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  • Catching Or Destruction (AREA)
  • Resistance Heating (AREA)

Abstract

L'invention concerne un ensemble chauffant (12) pour un dispositif de génération d'aérosol (10). L'ensemble chauffant comprend un canal d'écoulement d'air (14) et un élément chauffant (38). L'élément chauffant est disposé au moins partiellement dans le canal d'écoulement d'air ou entoure au moins partiellement le canal d'écoulement d'air. L'élément chauffant comprend un ou plusieurs trous traversants (32) pour permettre à l'air qui s'écoule à travers le canal d'écoulement d'air de s'écouler également à travers l'élément chauffant. L'élément chauffant est un élément chauffant inductif comprenant un concentrateur de flux. La divulgation concerne également un dispositif de génération d'aérosol, une cartouche pour un dispositif de génération d'aérosol et un système de génération d'aérosol comprenant un dispositif de génération d'aérosol et une cartouche.
PCT/EP2024/058461 2023-04-03 2024-03-28 Ensemble chauffant pour un dispositif de génération d'aérosol Pending WO2024208721A1 (fr)

Priority Applications (2)

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KR1020257032670A KR20250165359A (ko) 2023-04-03 2024-03-28 에어로졸 발생 장치용 가열 조립체
CN202480021425.2A CN120936264A (zh) 2023-04-03 2024-03-28 用于气溶胶生成装置的加热组件

Applications Claiming Priority (2)

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EP23166304 2023-04-03
EP23166304.8 2023-04-03

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WO2024208721A1 true WO2024208721A1 (fr) 2024-10-10

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3606366A1 (fr) * 2017-05-18 2020-02-12 JT International S.A. Unité de vaporisation pour un dispositif de vaporisation personnel
US20210195962A1 (en) * 2018-05-25 2021-07-01 Philip Morris Products S.A. Moulded cartridge assembly
WO2022063796A1 (fr) * 2020-09-23 2022-03-31 Philip Morris Products S.A. Structure de suscepteur empilée
CN114269179A (zh) * 2019-08-28 2022-04-01 菲利普莫里斯生产公司 具有可轴向移动感应加热器的气溶胶生成装置
WO2022112113A1 (fr) * 2020-11-24 2022-06-02 Philip Morris Products S.A. Accessoire pour dispositif de génération d'aérosol avec élément chauffant
US20220338549A1 (en) * 2019-09-19 2022-10-27 Philip Morris Products S.A. Aerosol-generating device comprising separate air inlets
US20220369717A1 (en) * 2019-10-31 2022-11-24 Philip Morris Products S.A. Aerosol-generating device for inductive heating of an aerosol-forming substrate
US20220369711A1 (en) * 2019-07-23 2022-11-24 Nicoventures Trading Limited Porous element for a vapor provision system
US20220386698A1 (en) * 2019-07-04 2022-12-08 Philip Morris Products S.A. Inductive heating arrangement with segmented inductive heating element
US20230082650A1 (en) * 2020-01-28 2023-03-16 Philip Morris Products S.A. Heating element having heat conductive and wicking filaments

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3606366A1 (fr) * 2017-05-18 2020-02-12 JT International S.A. Unité de vaporisation pour un dispositif de vaporisation personnel
US20210195962A1 (en) * 2018-05-25 2021-07-01 Philip Morris Products S.A. Moulded cartridge assembly
US20220386698A1 (en) * 2019-07-04 2022-12-08 Philip Morris Products S.A. Inductive heating arrangement with segmented inductive heating element
US20220369711A1 (en) * 2019-07-23 2022-11-24 Nicoventures Trading Limited Porous element for a vapor provision system
CN114269179A (zh) * 2019-08-28 2022-04-01 菲利普莫里斯生产公司 具有可轴向移动感应加热器的气溶胶生成装置
US20220338549A1 (en) * 2019-09-19 2022-10-27 Philip Morris Products S.A. Aerosol-generating device comprising separate air inlets
US20220369717A1 (en) * 2019-10-31 2022-11-24 Philip Morris Products S.A. Aerosol-generating device for inductive heating of an aerosol-forming substrate
US20230082650A1 (en) * 2020-01-28 2023-03-16 Philip Morris Products S.A. Heating element having heat conductive and wicking filaments
WO2022063796A1 (fr) * 2020-09-23 2022-03-31 Philip Morris Products S.A. Structure de suscepteur empilée
WO2022112113A1 (fr) * 2020-11-24 2022-06-02 Philip Morris Products S.A. Accessoire pour dispositif de génération d'aérosol avec élément chauffant

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