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WO2024208718A1 - Cartridge for aerosol-generating device - Google Patents

Cartridge for aerosol-generating device Download PDF

Info

Publication number
WO2024208718A1
WO2024208718A1 PCT/EP2024/058448 EP2024058448W WO2024208718A1 WO 2024208718 A1 WO2024208718 A1 WO 2024208718A1 EP 2024058448 W EP2024058448 W EP 2024058448W WO 2024208718 A1 WO2024208718 A1 WO 2024208718A1
Authority
WO
WIPO (PCT)
Prior art keywords
aerosol
cartridge
forming substrate
storage portion
liquid storage
Prior art date
Application number
PCT/EP2024/058448
Other languages
French (fr)
Inventor
Enrico TURRINI
Frédéric MATTHEY
Gérard Edmond ZUBER
Jérôme Christian COURBAT
Original Assignee
Philip Morris Products S.A.
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 S.A. filed Critical Philip Morris Products S.A.
Publication of WO2024208718A1 publication Critical patent/WO2024208718A1/en

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
    • A24F40/44—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
    • A24F40/30—Devices using two or more structurally separated inhalable precursors, e.g. using two liquid precursors in two cartridges
    • 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 cartridge for an aerosol-generating device.
  • the invention further relates to an aerosol-generating system comprising an aerosolgenerating device configured to receive a cartridge and to an aerosol-generating device configured to receive 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 cartridge for an aerosol-generating device with improved wicking of the liquid aerosol-forming substrate to a heating element of a heating assembly. It would be desirable to have a cartridge 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. It would be desirable to have a cartridge for an aerosol-generating device with improved airflow through the cartridge. It would be desirable to have a cartridge for an aerosol-generating device with adaptability of usage of different aerosol-forming substrates.
  • a cartridge for an aerosol-generating device 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.
  • a cartridge for an aerosol-generating device comprising a first liquid storage portion.
  • the first liquid storage portion comprises a first liquid aerosol-forming substrate.
  • the cartridge further comprises a second liquid storage portion.
  • the second liquid storage portion comprises a second liquid aerosol-forming substrate.
  • the first liquid aerosol-forming substrate is 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 storage portion may be arranged laterally distanced from the second liquid storage portion.
  • a main extension axis of the first liquid storage portion may be parallel to a longitudinal axis of the cartridge.
  • a main extension axis of the second liquid storage portion may be parallel to a longitudinal axis of the cartridge.
  • the main extension axis of the first liquid storage portion may be parallel to the main extension axis of the second liquid storage portion.
  • the first liquid aerosol-forming substrate may comprise nicotine.
  • the first liquid aerosol-forming substrate may have a nicotine concentration of between about 0.5% and about 10%, for example about 2%.
  • 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 second liquid aerosol-forming substrate may comprise water, solvents, ethanol, plant extracts and natural or artificial flavours.
  • 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 volume of the first liquid storage portion may be different from the volume of the second liquid storage portion.
  • the first liquid storage portion may be fluidly separated from the second liquid storage portion.
  • a wall of the cartridge may be arranged between the first liquid storage portion and the second liquid storage portion.
  • 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.
  • One or both of the first wicking element and the second wicking element may comprise, preferably may be, a capillary material may have a fibrous or spongy structure.
  • the capillary material preferably comprises a bundle of capillaries.
  • the capillary material may comprise a plurality of fibres or threads or other fine bore tubes. The fibres or threads may be generally aligned to convey liquid to the heater.
  • the capillary material may comprise sponge-like or foam-like material.
  • the structure of the capillary material forms a plurality of small bores or tubes, through which the liquid can be transported by capillary action.
  • the capillary material may comprise any suitable material or combination of materials.
  • suitable materials are a sponge or foam material, ceramic- or graphite-based materials in the form of fibres or sintered powders, foamed metal or plastics materials, a fibrous material, for example made of spun or extruded fibres, such as cellulose acetate, polyester, or bonded polyolefin, polyethylene, ethylene or polypropylene fibres, nylon fibres or ceramic.
  • the capillary material may have any suitable capillarity and porosity so as to be used with different liquid physical properties.
  • the liquid has physical properties, including but not limited to viscosity, surface tension, density, thermal conductivity, boiling point and vapour pressure, which allow the liquid to be transported through the capillary material by capillary action.
  • the capillary material may be configured to convey the aerosol-forming substrate to a heating element.
  • first wicking element and the second wicking element may extend into the first and second liquid storage portions, respectively.
  • liquid aerosolforming substrate may be transferred from the respective liquid storage portion to the heating element by capillary action in the respective wicking element.
  • the heating element may be part of a heating assembly for the 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 main extension axis of the heating element may be orthogonal to a main extension axis of the airflow channel.
  • the through hole of the heating element may be arranged centrally in the airflow channel.
  • the heating element may be circular, disk-shaped, rectangular or planar. Preferably, the heating element is annular.
  • the heating element may comprise multiple through holes that are arranged in a regular pattern in the heating element.
  • the one or more through holes may be configured as slits.
  • the heating element may comprise, preferably consists of, a heating track, preferably wherein 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 heating element may comprise at least two concentric heating tracks.
  • the heating element may comprise, preferably consists of, susceptor material.
  • the heating element may comprise, preferably consists of, resistive material.
  • the heating element may be configured as a detachable heating element.
  • the heating element may be arranged on a substrate layer, preferably wherein the protective layer may comprise glass, preferably wherein the protective layer consists of glass.
  • the heating element may be arranged adjacent, preferably embedded in, a flux concentrator.
  • One or both of the first wicking element and the second wicking element may be arranged in direct contact with the heating element.
  • One or both of the first wicking element and the second wicking element may be arranged proximal or distal of the heating element.
  • One or both of the first wicking element and the second wicking element may have one or more through holes aligning with the one or more through holes of the heating element.
  • One or both of the first wicking element and the second wicking element may be arranged at least partly surrounding a periphery of the heating element.
  • first wicking element and the second wicking element may be provided as a coating on the heating element.
  • One or both of the first wicking element and the second wicking element may be arranged on the heating element.
  • One or both of the first wicking element and the second 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.
  • One or both of the first wicking element and the second wicking element may comprise, preferably consists of, glass or ceramic material.
  • first wicking element and the second wicking element may comprise, preferably may consist of, glass or ceramic material.
  • One or both of the first wicking element and the second 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.
  • one or both of the first wicking element and the second 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 one or both of the first wicking element and the second wicking element and the heating element.
  • the first wicking element may comprise a first delivery portion configured to deliver the first liquid aerosol-forming substrate to the heating element.
  • the second wicking element may comprise a second delivery portion configured to deliver the second liquid aerosol-forming substrate to the heating element.
  • the first delivery portion may be integrally formed with the first wicking element.
  • the second delivery portion may be integrally formed with the second wicking 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.
  • a main surface area of the first delivery portion may be larger or smaller as a main surface area of the second delivery portion.
  • the first wicking element may be configured to wick a larger volume of liquid aerosolforming substrate over time as the second wicking element or vice versa.
  • 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 and the second wicking element may have a fully annular shape together.
  • the first and second wicking elements may be configured like two elements of a two-element pie chart where the two elements together form the full pie chart.
  • the first wicking element may be arranged fluidly separate from the second wicking element.
  • a gap may be provided between the first wicking element and the second wicking element.
  • the cartridge may further comprise a central airflow channel.
  • the first liquid storage portion may be arranged laterally offset with respect to the central airflow channel.
  • the second liquid storage portion may be arranged laterally offset with respect to the central airflow channel.
  • the first liquid storage portion may be arranged parallel to the central airflow channel.
  • the second liquid storage portion may be arranged parallel to the central airflow channel.
  • a main extension axis of the first liquid storage portion may be parallel to a main extension axis of the central airflow channel.
  • a main extension axis of the second liquid storage portion may be parallel to the main extension axis of the central airflow channel.
  • the central airflow channel may have a circular cross-section. Alternatively, the central airflow channel may have an elliptic or rectangular cross-section.
  • 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 heating element may be fluidly connected with the central airflow channel.
  • One or both of the first wicking element and the second wicking element may be fluidly connected with the central airflow channel at the heating element.
  • 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.
  • the second wicking element may be fluidly connected with the second portion of the central airflow channel.
  • the first portion of the central airflow channel may be fluidly separate from the second portion of the central airflow channel.
  • a main extension axis of the first portion of the central airflow channel may be parallel to a main extension axis of the second portion of the central airflow channel.
  • the ratio of the cross-sectional surface area of the first portion of the central airflow channel and of the cross-sectional surface area of the second portion of the central airflow channel may be similar or identical to the ratio of a large surface area of the first wicking element and of a large surface area of the second wicking element.
  • 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 configured to receive a cartridge as described herein.
  • the invention further relates to an aerosol-generating device configured to receive a cartridge as described herein.
  • the aerosol-generating device may comprise a cavity for receiving the cartridge.
  • the aerosol-generating device may comprise the heating assembly.
  • the cartridge may comprise the wicking element.
  • the wicking element may contact the heating element of the heating assembly when the cartridge is attached to the aerosol-generating device.
  • 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 cartridge for an aerosol-generating device, wherein the cartridge comprises: a first liquid storage portion, wherein the first liquid storage portion comprises a first liquid aerosol-forming substrate; and a second liquid storage portion, wherein the second liquid storage portion comprises a second liquid aerosol-forming substrate, wherein the first liquid aerosol-forming substrate is different from the second liquid aerosol-forming substrate.
  • Example ex2 The cartridge according to example ex1 , wherein the first liquid aerosolforming substrate comprises nicotine.
  • Example ex3 The cartridge according to any of the preceding examples, wherein the first liquid aerosol-forming substrate comprises 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.
  • Example ex4 The cartridge according to any of the preceding examples, wherein the second liquid aerosol-forming substrate comprises a flavourant.
  • Example ex5. The cartridge according to any of the preceding examples, wherein the second liquid aerosol-forming substrate comprises a solvent or a mixture of solvents and a flavourant.
  • Example ex6 The cartridge according to any of the preceding examples, wherein the first liquid storage portion has 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.
  • Example ex7 The cartridge according to any of the preceding examples, wherein the cartridge further comprises a first wicking element fluidly connected with the first liquid storage portion.
  • Example ex8 The cartridge according to any of the preceding examples, wherein the cartridge further comprises a second wicking element fluidly connected with the second liquid storage portion.
  • Example ex9 The cartridge according to examples ex7 and ex8, wherein the first wicking element comprises a first delivery portion configured to deliver the first liquid aerosolforming substrate to a heating element, and wherein the second wicking element comprises a second delivery portion configured to deliver the second liquid aerosol-forming substrate to a heating element.
  • Example ex10 The cartridge according to example ex9, wherein one or both of a main surface area of the first delivery portion is planar and a main surface area of the second delivery portion is planar.
  • Example ex11 The cartridge according to example ex9 or ex10, wherein a main surface area of the first delivery portion is different from a main surface area of the second delivery portion.
  • Example ex12 The cartridge according to any of examples ex7 to ex11 , wherein the first wicking element has a partly annular ring shape.
  • Example ex13 The cartridge according to any of examples ex7 to ex12, wherein the second wicking element has a partly annular ring shape.
  • Example ex14 The cartridge according to any of examples ex7 to ex13, wherein the first wicking element is arranged fluidly separate from the second wicking element.
  • Example ex15 The cartridge according to any of the preceding examples, wherein the cartridge further comprises a central airflow channel.
  • Example ex16 The cartridge according to any of examples ex7 to ex14 and according to example 15, wherein the first wicking element is fluidly connected with the central airflow channel and wherein the second wicking element is fluidly connected with the central airflow channel.
  • Example ex17 The cartridge according to example ex15 or ex16, wherein the central airflow channel comprises 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.
  • Example ex18 The cartridge according to any of examples ex7 to ex14 and according to example 17, wherein the first wicking element is fluidly connected with the first portion of the central airflow channel and the second wicking element is fluidly connected with the second portion of the central airflow channel.
  • Example ex19 The cartridge according to example ex17 or ex18, wherein the cross-sectional surface area of the first portion of the central airflow channel is different from the cross-sectional surface area of the second portion of the central airflow channel.
  • Example ex20 The cartridge according to any of examples ex17 to ex19, wherein the separating wall extends along a central longitudinal axis of the cartridge.
  • Example ex21 The cartridge according to any of examples ex15 to ex20, wherein the central airflow channel extends along a central longitudinal axis of the cartridge.
  • Example ex22 The cartridge according to any of the preceding examples, wherein the first liquid storage portion is configured detachable from the cartridge.
  • Example ex23 The cartridge according to any of the preceding examples, wherein the second liquid storage portion is configured detachable from the cartridge.
  • Example ex24 An aerosol-generating system comprising an aerosol-generating device configured to receive a cartridge according to any of the preceding examples.
  • Example ex25 An aerosol-generating device configured to receive a cartridge according to any of examples ex1 to ex23.
  • Fig. 1 shows a cartridge for an aerosol-generating device
  • Fig. 2 shows a cross-sectional top view of the cartridge
  • Fig. 3 shows a cross-sectional top view of a further embodiment of the cartridge
  • Fig. 4 shows a cross-sectional top view of a further embodiment of the cartridge
  • Fig. 5 shows a cross-sectional top view of a further embodiment of the cartridge
  • Fig. 6 shows a cross-sectional top view of a further embodiment of the cartridge
  • Fig. 7 shows a cross-sectional top view of a wicking element of the cartridge in contact with a heating element of a heating assembly of an aerosol-generating device
  • Fig. 8 shows a cross-sectional exploded side view of an embodiment of the aerosolgenerating device, of the cartridge and of the heating assembly, and
  • FIG. 9 shows the elements of Figure 8 in an assembled state.
  • Figure 1 shows a cartridge 10 for an aerosol-generating device 40.
  • the cartridge 10 comprises a first liquid storage portion 12 and a second liquid storage portion 14.
  • the first liquid storage portion 12 is configured to hold a first liquid aerosol-forming substrate 16.
  • the second liquid storage portion 14 is configured to hold a second liquid aerosol-forming substrate 18.
  • the first liquid aerosol-forming substrate 16 is different form the second liquid aerosolforming substrate 18.
  • the first liquid aerosol-forming substrate 16 contains nicotine while the second liquid aerosol-forming substrate 18 contains a flavourant.
  • Figure 1 further shows a central airflow channel 20 of the cartridge 10.
  • the central airflow channel 20 is arranged parallel to the first liquid storage portion 12 and parallel to the second liquid storage portion 14.
  • the first liquid storage portion 12 is arranged parallel to the second liquid storage portion 14.
  • the central airflow channel 20 is arranged to allow vaporized aerosol-forming substrate from the first and second liquid storage portion 14s to be drawn through the cartridge 10 and out of an air outlet 22 of the cartridge 10.
  • the air outlet 22 is arranged at a proximal or downstream end of the cartridge 10.
  • a wicking element 24 is arranged at an opposite distal or upstream end of the cartridge 10.
  • the wicking element 24 is fluidly connected with the first liquid storage portion 12 and with the second liquid storage portion 14 such that the first liquid aerosol-forming substrate 16 and the second liquid aerosol-forming substrate 18 can be wicked by the wicking element 24.
  • the wicking element 24 is configured to wick the first and second aerosol-forming substrates towards a heating element 38 of a heating assembly 42 as described herein.
  • the first liquid storage portion 12 is arranged fluidly separate from the second liquid storage portion 14 such that the first liquid aerosol-forming substrate 16 does not mix with the second liquid aerosol-forming substrate 18.
  • Figure 2 shows a cross-sectional top view of the cartridge 10 along the line A-A indicated in Figure 1.
  • Figure 2 shows the first liquid storage portion 12 having the same cross- sectional shape as the second liquid storage portion 14.
  • Figure 2 further shows the arrangement of the central airflow channel 20 of the cartridge 10.
  • Figure 3 shows a cross-sectional top view of a further embodiment of the cartridge 10.
  • the first liquid storage portion 12 has a different cross-sectional shape as the second liquid storage portion 14. This enables the first liquid storage portion 12 to hold a different amount of the first liquid aerosol-forming substrate 16 in comparison with the holding capacity of the second liquid storage portion 14 for the second liquid aerosol-forming substrate 18.
  • Figure 4 shows a cross-sectional top view of a further embodiment of the cartridge 10.
  • a further third liquid storage portion 24 is provided for holding a third liquid aerosol-forming substrate 26.
  • the cross-sectional shape of each of the first liquid storage portion 12, second liquid storage portion 14 and third liquid storage portion 24 are different. Further, each of the first liquid storage portion 12, second liquid storage portion 14 and third liquid storage portion 24 are configured to hold different liquid aerosol-forming substrates.
  • FIG. 5 shows a cross-sectional top view of a further embodiment of the cartridge 10.
  • a separation wall 28 is provided in the central airflow channel 20 of the cartridge 10.
  • the separation wall 28 extends along a longitudinal central axis of the central airflow channel 20.
  • the separation wall 28 fluidly separates the central airflow channel 20 into a first portion of the central airflow channel 20 and a second portion of the central airflow channel 20.
  • the first portion of the central airflow channel 20 is fluidly connected with the first liquid storage portion 12.
  • the second portion of the central airflow channel 20 is fluidly connected with the second liquid storage portion 14.
  • This configuration enables a separation of the airflow saturated with vaporized first liquid aerosol-forming substrate 16 in the first portion of the central airflow channel 20 from the airflow saturated with vaporized second liquid aerosol-forming substrate 18 in the second portion of the central airflow channel 20.
  • Figure 6 shows a cross-sectional top view of a further embodiment of the cartridge 10.
  • the first liquid storage portion 12 is configured removably detachable from the cartridge 10.
  • the first liquid storage portion 12 may be decoupled from the central airflow channel 20 of the cartridge 10. This configuration is particularly beneficial in case of a depletion of the first liquid aerosol-forming substrate 16.
  • a fresh first liquid storage portion 12 may then be coupled to the cartridge 10.
  • the second liquid storage portion 14 may be configured removably detachable from the cartridge 10 alternatively or additionally to the first liquid storage portion 12.
  • Figure 7 shows a cross-sectional top view of the wicking element 24 of the cartridge 10 in contact with the heating element 38 of a heating assembly 42 of an aerosol-generating device 40.
  • the wicking element 24 is separated into a first wicking element 34 and a second wicking element 36.
  • a portion of the first wicking element 34 fluidly contacts the first liquid storage portion 12 for wicking the first liquid aerosol-forming substrate 16 towards the heating element 38.
  • a first delivery portion of the first wicking element 34 contacts the heating element 38.
  • the cross-section of the first delivery portion contacting the heating element 38 is what is shown in Figure 7.
  • a proximal large surface of the first wicking element 34 may be in fluid contact with the first liquid storage portion 12.
  • a distal large surface of the first wicking element 34 may be in fluid contact with the heating element 38.
  • the second wicking element 36 is configured correspondingly having a second delivery portion contacting the heating element 38 and being in fluid contact with the second liquid storage portion 14.
  • FIG 8 shows a cross-sectional exploded side view of an embodiment of an aerosolgenerating device 40, of the cartridge 10 and of the heating assembly 42.
  • the heating element 38 is configured removable as part of a susceptor body 44.
  • the heating element 38 (and preferably a substrate layer of the heating element 38 not shown in Figure 8) is held by a susceptor holder 46.
  • the susceptor body 44 further comprises an air inlet 48.
  • the susceptor body 44 is sandwiched between the cartridge 10 and the main body 50 of the aerosol-generating device 40.
  • the main body 50 of the aerosol-generating device 40 comprises an induction coil 52 at least partly surrounded by a flux concentrator 54.
  • the flux concentrator 54 in this embodiment has a U-shape to concentrate the alternating magnetic field created by the induction coil 52 towards the heating element 38.
  • the main body 50 further comprises a puff sensor 56.
  • the wicking element 24 is arranged as part of the cartridge 10.
  • the wicking element 24 is fluidly connected with the liquid storage portion of the cartridge 10.
  • the wicking element 24 contacts the heating element 38 so as to supply the liquid aerosol-forming substrate from the liquid storage portion to the heating element 38.
  • Figure 9 shows the elements of Figure 8 in an assembled state. Particularly, Figure 9 shows how ambient air 60 is drawn into the aerosol-generating device 40 through the air inlet 48. The air flows over the heating element 38 and through a through hole 58 of the heating assembly 42. Figure 9 further shows a vaporization area 62 where liquid aerosol-forming substrate is vaporized in an uncovered region of the heating element 38 (not covered by the wicking element 24).

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Abstract

The invention relates to a cartridge (10) for an aerosol-generating device (40). The cartridge comprises a first liquid storage portion (12). The first liquid storage portion comprises a first liquid aerosol-forming substrate (16). The cartridge further comprises a second liquid storage portion (14). The second liquid storage portion comprises a second liquid aerosol-forming substrate (18). The first liquid aerosol-forming substrate is different from the second liquid aerosol-forming substrate. The cartridge further comprises a first wicking element (24) fluidly connected with the first liquid storage portion and a second wicking element (24) fluidly connected with the second liquid storage portion. The invention further relates to an aerosol-generating system comprising an aerosol-generating device configured to receive a cartridge and to an aerosol-generating device configured to receive a cartridge.

Description

CARTRIDGE FOR AEROSOL-GENERATING DEVICE
The present invention relates to a cartridge for an aerosol-generating device. The invention further relates to an aerosol-generating system comprising an aerosolgenerating device configured to receive a cartridge and to an aerosol-generating device configured to receive a cartridge.
It is known to provide an 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. Conventionally, wicking elements have been employed for wicking the liquid aerosol-forming substrate towards the heating coil.
It would be desirable to have a cartridge for an aerosol-generating device with improved wicking of the liquid aerosol-forming substrate to a heating element of a heating assembly. It would be desirable to have a cartridge 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. It would be desirable to have a cartridge for an aerosol-generating device with improved airflow through the cartridge. It would be desirable to have a cartridge for an aerosol-generating device with adaptability of usage of different aerosol-forming substrates.
According to an embodiment of the invention there is provided a cartridge for an aerosol-generating device. 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.
According to an embodiment of the invention there is provided a cartridge for an aerosol-generating device. The cartridge comprises a first liquid storage portion. The first liquid storage portion comprises a first liquid aerosol-forming substrate. The cartridge further comprises a second liquid storage portion. The second liquid storage portion comprises a second liquid aerosol-forming substrate. The first liquid aerosol-forming substrate is different from the second liquid aerosol-forming substrate.
Providing a cartridge with different liquid aerosol-forming substrates enables adaptability of the aerosol created by the aerosol-generating device. Exemplarily, 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. Further, 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 storage portion may be arranged laterally distanced from the second liquid storage portion.
A main extension axis of the first liquid storage portion may be parallel to a longitudinal axis of the cartridge. A main extension axis of the second liquid storage portion may be parallel to a longitudinal axis of the cartridge. The main extension axis of the first liquid storage portion may be parallel to the main extension axis of the second liquid storage portion.
The first liquid aerosol-forming substrate may comprise nicotine. The first liquid aerosol-forming substrate may have a nicotine concentration of between about 0.5% and about 10%, for example about 2%.
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 second liquid aerosol-forming substrate may comprise water, solvents, ethanol, plant extracts and natural or artificial flavours.
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. In other words, the volume of the first liquid storage portion may be different from the volume of the second liquid storage portion.
The first liquid storage portion may be fluidly separated from the second liquid storage portion.
A wall of the cartridge may be arranged between the first liquid storage portion and the second liquid storage portion.
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. One or both of the first wicking element and the second wicking element may comprise, preferably may be, a capillary material may have a fibrous or spongy structure. The capillary material preferably comprises a bundle of capillaries. For example, the capillary material may comprise a plurality of fibres or threads or other fine bore tubes. The fibres or threads may be generally aligned to convey liquid to the heater. Alternatively, the capillary material may comprise sponge-like or foam-like material. The structure of the capillary material forms a plurality of small bores or tubes, through which the liquid can be transported by capillary action. The capillary material may comprise any suitable material or combination of materials. Examples of suitable materials are a sponge or foam material, ceramic- or graphite-based materials in the form of fibres or sintered powders, foamed metal or plastics materials, a fibrous material, for example made of spun or extruded fibres, such as cellulose acetate, polyester, or bonded polyolefin, polyethylene, ethylene or polypropylene fibres, nylon fibres or ceramic. The capillary material may have any suitable capillarity and porosity so as to be used with different liquid physical properties. The liquid has physical properties, including but not limited to viscosity, surface tension, density, thermal conductivity, boiling point and vapour pressure, which allow the liquid to be transported through the capillary material by capillary action. The capillary material may be configured to convey the aerosol-forming substrate to a heating element.
One or both of the first wicking element and the second wicking element may extend into the first and second liquid storage portions, respectively. In this case, in use, liquid aerosolforming substrate may be transferred from the respective liquid storage portion to the heating element by capillary action in the respective wicking element.
The heating element may be part of a heating assembly for the 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 main extension axis of the heating element may be orthogonal to a main extension axis of the airflow channel.
The through hole of the heating element may be arranged centrally in the airflow channel.
The heating element may be circular, disk-shaped, rectangular or planar. Preferably, the heating element is annular.
The heating element may comprise multiple through holes that are arranged in a regular pattern in the heating element.
The one or more through holes may be configured as slits. The heating element may comprise, preferably consists of, a heating track, preferably wherein 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 heating element may comprise at least two concentric heating tracks.
The heating element may comprise, preferably consists of, susceptor material.
The heating element may comprise, preferably consists of, resistive material.
The heating element may be configured as a detachable heating element.
The heating element may be arranged on a substrate layer, preferably wherein the protective layer may comprise glass, preferably wherein the protective layer consists of glass.
The heating element may be arranged adjacent, preferably embedded in, a flux concentrator.
One or both of the first wicking element and the second wicking element may be arranged in direct contact with the heating element.
One or both of the first wicking element and the second wicking element may be arranged proximal or distal of the heating element.
One or both of the first wicking element and the second wicking element may have one or more through holes aligning with the one or more through holes of the heating element.
One or both of the first wicking element and the second wicking element may be arranged at least partly surrounding a periphery of the heating element.
One or both of the first wicking element and the second wicking element may be provided as a coating on the heating element. One or both of the first wicking element and the second wicking element may be arranged on the heating element. One or both of the first wicking element and the second 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.
One or both of the first wicking element and the second wicking element may comprise, preferably consists of, glass or ceramic material.
One or both of the first wicking element and the second wicking element may comprise, preferably may consist of, glass or ceramic material. One or both of the first wicking element and the second 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. In a preferred embodiment, one or both of the first wicking element and the second 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 one or both of the first wicking element and the second wicking element and the heating element. The first wicking element may comprise a first delivery portion configured to deliver the first liquid aerosol-forming substrate to the heating element. The second wicking element may comprise a second delivery portion configured to deliver the second liquid aerosol-forming substrate to the heating element.
The first delivery portion may be integrally formed with the first wicking element. The second delivery portion may be integrally formed with the second wicking 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. A main surface area of the first delivery portion may be larger or smaller as a main surface area of the second delivery portion.
The first wicking element may be configured to wick a larger volume of liquid aerosolforming substrate over time as the second wicking element or vice versa.
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 and the second wicking element may have a fully annular shape together. In other words, the first and second wicking elements may be configured like two elements of a two-element pie chart where the two elements together form the full pie chart.
The first wicking element may be arranged fluidly separate from the second wicking element. A gap may be provided between the first wicking element and the second wicking element.
The cartridge may further comprise a central airflow channel. The first liquid storage portion may be arranged laterally offset with respect to the central airflow channel. The second liquid storage portion may be arranged laterally offset with respect to the central airflow channel. The first liquid storage portion may be arranged parallel to the central airflow channel. The second liquid storage portion may be arranged parallel to the central airflow channel. A main extension axis of the first liquid storage portion may be parallel to a main extension axis of the central airflow channel. A main extension axis of the second liquid storage portion may be parallel to the main extension axis of the central airflow channel. The central airflow channel may have a circular cross-section. Alternatively, the central airflow channel may have an elliptic or rectangular cross-section.
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 heating element may be fluidly connected with the central airflow channel. One or both of the first wicking element and the second wicking element may be fluidly connected with the central airflow channel at the heating element. 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. The second wicking element may be fluidly connected with the second portion of the central airflow channel.
The first portion of the central airflow channel may be fluidly separate from the second portion of the central airflow channel. A main extension axis of the first portion of the central airflow channel may be parallel to a main extension axis of 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 ratio of the cross-sectional surface area of the first portion of the central airflow channel and of the cross-sectional surface area of the second portion of the central airflow channel may be similar or identical to the ratio of a large surface area of the first wicking element and of a large surface area of the second wicking element.
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 configured to receive a cartridge as described herein.
The invention further relates to an aerosol-generating device configured to receive a cartridge as described herein. The aerosol-generating device may comprise a cavity for receiving the cartridge.
The aerosol-generating device may comprise the heating assembly. The cartridge may comprise the wicking element. The wicking element may contact the heating element of the heating assembly when the cartridge is attached to the aerosol-generating device.
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. In use, 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. Alternatively, 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.
As used herein, 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.
As used herein with reference to the present invention, 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. In one embodiment, the power supply is a Lithium-ion battery. Alternatively, 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. As an alternative, 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.
In any of the aspects of the disclosure, 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. Examples of suitable doped ceramics include doped silicon carbides. Examples of suitable metals include titanium, zirconium, tantalum platinum, gold and silver. Examples of 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. In composite materials, 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.
As described, in any of the aspects of the disclosure, 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. In one such embodiment, the electrically resistive heating element may be formed using a metal having a defined relationship between temperature and resistivity. In such an exemplary device, 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.
As an alternative to an electrically resistive heating element, 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. In general, 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. If the susceptor is magnetic, but not conductive, then hysteresis losses will be the only means by which the susceptor will heat, when penetrated by an alternating magnetic field. According to the invention, 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.
As used herein, the term ‘aerosol-generating article’ refers to an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol. For example, 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.
As used herein, the term ‘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.
Below, there is provided a non-exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.
Example ex1. A cartridge for an aerosol-generating device, wherein the cartridge comprises: a first liquid storage portion, wherein the first liquid storage portion comprises a first liquid aerosol-forming substrate; and a second liquid storage portion, wherein the second liquid storage portion comprises a second liquid aerosol-forming substrate, wherein the first liquid aerosol-forming substrate is different from the second liquid aerosol-forming substrate.
Example ex2. The cartridge according to example ex1 , wherein the first liquid aerosolforming substrate comprises nicotine.
Example ex3. The cartridge according to any of the preceding examples, wherein the first liquid aerosol-forming substrate comprises 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.
Example ex4. The cartridge according to any of the preceding examples, wherein the second liquid aerosol-forming substrate comprises a flavourant.
Example ex5. The cartridge according to any of the preceding examples, wherein the second liquid aerosol-forming substrate comprises a solvent or a mixture of solvents and a flavourant. Example ex6. The cartridge according to any of the preceding examples, wherein the first liquid storage portion has 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.
Example ex7. The cartridge according to any of the preceding examples, wherein the cartridge further comprises a first wicking element fluidly connected with the first liquid storage portion.
Example ex8. The cartridge according to any of the preceding examples, wherein the cartridge further comprises a second wicking element fluidly connected with the second liquid storage portion.
Example ex9. The cartridge according to examples ex7 and ex8, wherein the first wicking element comprises a first delivery portion configured to deliver the first liquid aerosolforming substrate to a heating element, and wherein the second wicking element comprises a second delivery portion configured to deliver the second liquid aerosol-forming substrate to a heating element.
Example ex10. The cartridge according to example ex9, wherein one or both of a main surface area of the first delivery portion is planar and a main surface area of the second delivery portion is planar.
Example ex11. The cartridge according to example ex9 or ex10, wherein a main surface area of the first delivery portion is different from a main surface area of the second delivery portion.
Example ex12. The cartridge according to any of examples ex7 to ex11 , wherein the first wicking element has a partly annular ring shape.
Example ex13. The cartridge according to any of examples ex7 to ex12, wherein the second wicking element has a partly annular ring shape.
Example ex14. The cartridge according to any of examples ex7 to ex13, wherein the first wicking element is arranged fluidly separate from the second wicking element.
Example ex15. The cartridge according to any of the preceding examples, wherein the cartridge further comprises a central airflow channel.
Example ex16. The cartridge according to any of examples ex7 to ex14 and according to example 15, wherein the first wicking element is fluidly connected with the central airflow channel and wherein the second wicking element is fluidly connected with the central airflow channel.
Example ex17. The cartridge according to example ex15 or ex16, wherein the central airflow channel comprises 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. Example ex18. The cartridge according to any of examples ex7 to ex14 and according to example 17, wherein the first wicking element is fluidly connected with the first portion of the central airflow channel and the second wicking element is fluidly connected with the second portion of the central airflow channel.
Example ex19. The cartridge according to example ex17 or ex18, wherein the cross-sectional surface area of the first portion of the central airflow channel is different from the cross-sectional surface area of the second portion of the central airflow channel.
Example ex20. The cartridge according to any of examples ex17 to ex19, wherein the separating wall extends along a central longitudinal axis of the cartridge.
Example ex21. The cartridge according to any of examples ex15 to ex20, wherein the central airflow channel extends along a central longitudinal axis of the cartridge.
Example ex22. The cartridge according to any of the preceding examples, wherein the first liquid storage portion is configured detachable from the cartridge.
Example ex23. The cartridge according to any of the preceding examples, wherein the second liquid storage portion is configured detachable from the cartridge.
Example ex24. An aerosol-generating system comprising an aerosol-generating device configured to receive a cartridge according to any of the preceding examples.
Example ex25. An aerosol-generating device configured to receive a cartridge according to any of examples ex1 to ex23.
Features described in relation to one embodiment may equally be applied to other embodiments of the invention.
The invention will be further described, by way of example only, with reference to the accompanying drawings in which:
Fig. 1 shows a cartridge for an aerosol-generating device,
Fig. 2 shows a cross-sectional top view of the cartridge,
Fig. 3 shows a cross-sectional top view of a further embodiment of the cartridge,
Fig. 4 shows a cross-sectional top view of a further embodiment of the cartridge,
Fig. 5 shows a cross-sectional top view of a further embodiment of the cartridge,
Fig. 6 shows a cross-sectional top view of a further embodiment of the cartridge,
Fig. 7 shows a cross-sectional top view of a wicking element of the cartridge in contact with a heating element of a heating assembly of an aerosol-generating device,
Fig. 8 shows a cross-sectional exploded side view of an embodiment of the aerosolgenerating device, of the cartridge and of the heating assembly, and
Fig. 9 shows the elements of Figure 8 in an assembled state. Figure 1 shows a cartridge 10 for an aerosol-generating device 40. The cartridge 10 comprises a first liquid storage portion 12 and a second liquid storage portion 14. The first liquid storage portion 12 is configured to hold a first liquid aerosol-forming substrate 16. The second liquid storage portion 14 is configured to hold a second liquid aerosol-forming substrate 18. The first liquid aerosol-forming substrate 16 is different form the second liquid aerosolforming substrate 18. Preferably, the first liquid aerosol-forming substrate 16 contains nicotine while the second liquid aerosol-forming substrate 18 contains a flavourant.
Figure 1 further shows a central airflow channel 20 of the cartridge 10. The central airflow channel 20 is arranged parallel to the first liquid storage portion 12 and parallel to the second liquid storage portion 14. The first liquid storage portion 12 is arranged parallel to the second liquid storage portion 14. The central airflow channel 20 is arranged to allow vaporized aerosol-forming substrate from the first and second liquid storage portion 14s to be drawn through the cartridge 10 and out of an air outlet 22 of the cartridge 10. The air outlet 22 is arranged at a proximal or downstream end of the cartridge 10.
At an opposite distal or upstream end of the cartridge 10, a wicking element 24 is arranged. The wicking element 24 is fluidly connected with the first liquid storage portion 12 and with the second liquid storage portion 14 such that the first liquid aerosol-forming substrate 16 and the second liquid aerosol-forming substrate 18 can be wicked by the wicking element 24. The wicking element 24 is configured to wick the first and second aerosol-forming substrates towards a heating element 38 of a heating assembly 42 as described herein.
The first liquid storage portion 12 is arranged fluidly separate from the second liquid storage portion 14 such that the first liquid aerosol-forming substrate 16 does not mix with the second liquid aerosol-forming substrate 18.
Figure 2 shows a cross-sectional top view of the cartridge 10 along the line A-A indicated in Figure 1. Figure 2 shows the first liquid storage portion 12 having the same cross- sectional shape as the second liquid storage portion 14. Figure 2 further shows the arrangement of the central airflow channel 20 of the cartridge 10.
Figure 3 shows a cross-sectional top view of a further embodiment of the cartridge 10. In this embodiment, the first liquid storage portion 12 has a different cross-sectional shape as the second liquid storage portion 14. This enables the first liquid storage portion 12 to hold a different amount of the first liquid aerosol-forming substrate 16 in comparison with the holding capacity of the second liquid storage portion 14 for the second liquid aerosol-forming substrate 18.
Figure 4 shows a cross-sectional top view of a further embodiment of the cartridge 10. In this embodiment, a further third liquid storage portion 24 is provided for holding a third liquid aerosol-forming substrate 26. The cross-sectional shape of each of the first liquid storage portion 12, second liquid storage portion 14 and third liquid storage portion 24 are different. Further, each of the first liquid storage portion 12, second liquid storage portion 14 and third liquid storage portion 24 are configured to hold different liquid aerosol-forming substrates.
Figure 5 shows a cross-sectional top view of a further embodiment of the cartridge 10. In this embodiment, a separation wall 28 is provided in the central airflow channel 20 of the cartridge 10. The separation wall 28 extends along a longitudinal central axis of the central airflow channel 20. The separation wall 28 fluidly separates the central airflow channel 20 into a first portion of the central airflow channel 20 and a second portion of the central airflow channel 20. The first portion of the central airflow channel 20 is fluidly connected with the first liquid storage portion 12. The second portion of the central airflow channel 20 is fluidly connected with the second liquid storage portion 14. This configuration enables a separation of the airflow saturated with vaporized first liquid aerosol-forming substrate 16 in the first portion of the central airflow channel 20 from the airflow saturated with vaporized second liquid aerosol-forming substrate 18 in the second portion of the central airflow channel 20.
Figure 6 shows a cross-sectional top view of a further embodiment of the cartridge 10. In this embodiment, the first liquid storage portion 12 is configured removably detachable from the cartridge 10. As depicted in Figure 6, the first liquid storage portion 12 may be decoupled from the central airflow channel 20 of the cartridge 10. This configuration is particularly beneficial in case of a depletion of the first liquid aerosol-forming substrate 16. A fresh first liquid storage portion 12 may then be coupled to the cartridge 10. In a similar way, the second liquid storage portion 14 may be configured removably detachable from the cartridge 10 alternatively or additionally to the first liquid storage portion 12.
Figure 7 shows a cross-sectional top view of the wicking element 24 of the cartridge 10 in contact with the heating element 38 of a heating assembly 42 of an aerosol-generating device 40. In this embodiment, the wicking element 24 is separated into a first wicking element 34 and a second wicking element 36. A portion of the first wicking element 34 fluidly contacts the first liquid storage portion 12 for wicking the first liquid aerosol-forming substrate 16 towards the heating element 38. A first delivery portion of the first wicking element 34 contacts the heating element 38. The cross-section of the first delivery portion contacting the heating element 38 is what is shown in Figure 7. A proximal large surface of the first wicking element 34 may be in fluid contact with the first liquid storage portion 12. A distal large surface of the first wicking element 34 may be in fluid contact with the heating element 38. The second wicking element 36 is configured correspondingly having a second delivery portion contacting the heating element 38 and being in fluid contact with the second liquid storage portion 14.
Figure 8 shows a cross-sectional exploded side view of an embodiment of an aerosolgenerating device 40, of the cartridge 10 and of the heating assembly 42. In this embodiment, the heating element 38 is configured removable as part of a susceptor body 44. The heating element 38 (and preferably a substrate layer of the heating element 38 not shown in Figure 8) is held by a susceptor holder 46. The susceptor body 44 further comprises an air inlet 48. The susceptor body 44 is sandwiched between the cartridge 10 and the main body 50 of the aerosol-generating device 40.
The main body 50 of the aerosol-generating device 40 comprises an induction coil 52 at least partly surrounded by a flux concentrator 54. The flux concentrator 54 in this embodiment has a U-shape to concentrate the alternating magnetic field created by the induction coil 52 towards the heating element 38. The main body 50 further comprises a puff sensor 56.
The wicking element 24 is arranged as part of the cartridge 10. The wicking element 24 is fluidly connected with the liquid storage portion of the cartridge 10. In an assembled state (as discussed with reference to the following Figure 9), the wicking element 24 contacts the heating element 38 so as to supply the liquid aerosol-forming substrate from the liquid storage portion to the heating element 38.
Figure 9 shows the elements of Figure 8 in an assembled state. Particularly, Figure 9 shows how ambient air 60 is drawn into the aerosol-generating device 40 through the air inlet 48. The air flows over the heating element 38 and through a through hole 58 of the heating assembly 42. Figure 9 further shows a vaporization area 62 where liquid aerosol-forming substrate is vaporized in an uncovered region of the heating element 38 (not covered by the wicking element 24).

Claims

1. A cartridge for an aerosol-generating device, wherein the cartridge comprises: a first liquid storage portion, wherein the first liquid storage portion comprises a first liquid aerosol-forming substrate; and a second liquid storage portion, wherein the second liquid storage portion comprises a second liquid aerosol-forming substrate, wherein the first liquid aerosol-forming substrate is different from the second liquid aerosol-forming substrate, wherein the cartridge further comprises a first wicking element fluidly connected with the first liquid storage portion, wherein the cartridge further comprises a second wicking element fluidly connected with the second liquid storage portion.
2. The cartridge according to claim 1 , wherein the first liquid aerosol-forming substrate comprises nicotine.
3. The cartridge according to any of the preceding claims, wherein the first liquid aerosol-forming substrate comprises 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.
4. The cartridge according to any of the preceding claims, wherein the second liquid aerosol-forming substrate comprises a flavourant.
5. The cartridge according to any of the preceding claims, wherein the second liquid aerosol-forming substrate comprises a solvent or a mixture of solvents and a flavourant.
6. The cartridge according to any of the preceding claims, wherein the first liquid storage portion has 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.
7. The cartridge according to any of the preceding claims, wherein the first wicking element comprises a first delivery portion configured to deliver the first liquid aerosol-forming substrate to a heating element, and wherein the second wicking element comprises a second delivery portion configured to deliver the second liquid aerosol-forming substrate to a heating element.
8. The cartridge according to claim 7, wherein one or both of a main surface area of the first delivery portion is planar and a main surface area of the second delivery portion is planar.
9. The cartridge according to claim 7 or 8, wherein a main surface area of the first delivery portion is different from a main surface area of the second delivery portion.
10. The cartridge according to any of claims 0 to 9, wherein the first wicking element has a partly annular ring shape.
11. The cartridge according to any of claims 0 to 10, wherein the second wicking element has a partly annular ring shape.
12. An aerosol-generating system comprising an aerosol-generating device configured to receive a cartridge according to any of the preceding claims.
13. An aerosol-generating device configured to receive a cartridge according to any of claims 1 to 11.
PCT/EP2024/058448 2023-04-03 2024-03-28 Cartridge for aerosol-generating device WO2024208718A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23166305 2023-04-03
EP23166305.5 2023-04-03

Publications (1)

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WO2024208718A1 true WO2024208718A1 (en) 2024-10-10

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140000638A1 (en) * 2012-06-28 2014-01-02 R.J. Reynolds Tobacco Company Reservoir and heater system for controllable delivery of multiple aerosolizable materials in an electronic smoking article
EP3113637A1 (en) * 2014-06-24 2017-01-11 Philip Morris Products S.A. Aerosol-generating system for delivering nicotine salt particles
WO2017185051A1 (en) * 2016-04-22 2017-10-26 Pax Labs, Inc. Aerosol devices having compartmentalized materials
EP3393281A1 (en) * 2015-12-22 2018-10-31 Philip Morris Products S.a.s. A cartridge for an aerosol-generating system and an aerosol-generating system comprising a cartridge
US10743589B1 (en) * 2019-10-09 2020-08-18 Cegnum LLC Electronic smoking device that is non-circular and includes plural atomizers in a parallel arrangement
WO2022211382A1 (en) * 2021-04-02 2022-10-06 주식회사 케이티앤지 Multi-cartridge and aerosol-generating device comprising same
US20220354168A1 (en) * 2020-01-30 2022-11-10 Nerudia Limited Aerosol delivery system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140000638A1 (en) * 2012-06-28 2014-01-02 R.J. Reynolds Tobacco Company Reservoir and heater system for controllable delivery of multiple aerosolizable materials in an electronic smoking article
EP3113637A1 (en) * 2014-06-24 2017-01-11 Philip Morris Products S.A. Aerosol-generating system for delivering nicotine salt particles
EP3393281A1 (en) * 2015-12-22 2018-10-31 Philip Morris Products S.a.s. A cartridge for an aerosol-generating system and an aerosol-generating system comprising a cartridge
WO2017185051A1 (en) * 2016-04-22 2017-10-26 Pax Labs, Inc. Aerosol devices having compartmentalized materials
US10743589B1 (en) * 2019-10-09 2020-08-18 Cegnum LLC Electronic smoking device that is non-circular and includes plural atomizers in a parallel arrangement
US20220354168A1 (en) * 2020-01-30 2022-11-10 Nerudia Limited Aerosol delivery system
WO2022211382A1 (en) * 2021-04-02 2022-10-06 주식회사 케이티앤지 Multi-cartridge and aerosol-generating device comprising same

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