WO2024084198A1 - Systèmes et procédés de distribution d'aérosol - Google Patents

Systèmes et procédés de distribution d'aérosol Download PDF

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Publication number
WO2024084198A1
WO2024084198A1 PCT/GB2023/052689 GB2023052689W WO2024084198A1 WO 2024084198 A1 WO2024084198 A1 WO 2024084198A1 GB 2023052689 W GB2023052689 W GB 2023052689W WO 2024084198 A1 WO2024084198 A1 WO 2024084198A1
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WO
WIPO (PCT)
Prior art keywords
flow path
baffle
fluid
aerosol
subsystem
Prior art date
Application number
PCT/GB2023/052689
Other languages
English (en)
Inventor
Howard ROTHWELL
Original Assignee
Nicoventures Trading Limited
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 Nicoventures Trading Limited filed Critical Nicoventures Trading Limited
Publication of WO2024084198A1 publication Critical patent/WO2024084198A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/48—Fluid transfer means, e.g. pumps
    • A24F40/485—Valves; Apertures
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/10—Devices using liquid inhalable precursors

Definitions

  • the present disclosure relates to aerosol delivery systems such as, but not exclusively, nicotine delivery systems (e.g. e-cigarettes).
  • Aerosol delivery systems such as electronic cigarettes (e-cigarettes) generally contain an aerosol generating material, such as a chamber of a source solid or liquid, which may contain an active substance and / or a flavour, from which an aerosol or vapour is generated for inhalation by a user, for example through heat vaporisation.
  • an aerosol delivery system will typically comprise an aerosol generation area containing an aerosol generator, e.g. a heating element, arranged to vaporise or aerosolise a portion of precursor material to generate a vapour or aerosol in the aerosol generation area.
  • Some electronic cigarettes may also include a flavour element in the air flow path through the device to impart additional flavours.
  • Such devices may sometimes be referred to as hybrid devices, and the flavour element may, for example, include a portion of tobacco arranged in the air flow path between the aerosol generation area and the mouthpiece such that aerosol I condensation aerosol drawn through the device passes through the portion of tobacco before exiting the mouthpiece for user inhalation.
  • WO 2016/012774 discloses electronic vapour provision systems comprising a collar around a housing for a user to adjust alignment between one or more air inlet holes of the housing and the collar, to provide different levels of ventilation to the system.
  • WO 2017/046566 discloses an aerosol provision system with an airflow adjuster in the airflow path, downstream from the air inlet.
  • an aerosol delivery system comprises functionality enabling operating characteristics of the system to be adjusted, preferably automatically, in order to target certain operating characteristics which may be desirable to a user.
  • the term “delivery system” is intended to encompass systems that deliver at least one substance to a user in use, and includes: combustible aerosol provision systems, such as cigarettes, cigarillos, cigars, and tobacco for pipes or for roll-your-own or for make-your-own cigarettes (whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, tobacco substitutes or other smokable material); non-combustible aerosol provision systems that release compounds from an aerosolgenerating material without combusting the aerosol-generating material, such as electronic cigarettes, tobacco heating products, and hybrid systems to generate aerosol using a combination of aerosolgenerating materials; and aerosol-free delivery systems that deliver the at least one substance to a user orally, nasally, transdermally or in another way without forming an aerosol, including but not limited to, lozenges, gums, patches, articles comprising inhalable powders, and oral products such as oral tobacco which includes snus or moist snuff, wherein the at least one substance may or may not
  • a “combustible” aerosol provision system is one where a constituent aerosol-generating material of the aerosol provision system (or component thereof) is combusted or burned during use in order to facilitate delivery of at least one substance to a user.
  • the delivery system is a combustible aerosol provision system, such as a system selected from the group consisting of a cigarette, a cigarillo and a cigar.
  • the disclosure relates to a component for use in a combustible aerosol provision system, such as a filter, a filter rod, a filter segment, a tobacco rod, a spill, an aerosolmodifying agent release component such as a capsule, a thread, or a bead, or a paper such as a plug wrap, a tipping paper or a cigarette paper.
  • a component for use in a combustible aerosol provision system such as a filter, a filter rod, a filter segment, a tobacco rod, a spill, an aerosolmodifying agent release component such as a capsule, a thread, or a bead, or a paper such as a plug wrap, a tipping paper or a cigarette paper.
  • Non-Combustible Aerosol Provision System is one where a constituent aerosol-generating material of the aerosol provision system (or component thereof) is not combusted or burned in order to facilitate delivery of at least one substance to a user.
  • the delivery system is a non-combustible aerosol provision system, such as a powered non-combustible aerosol provision system.
  • the non-combustible aerosol provision system is an electronic cigarette, also known as a vaping device or electronic nicotine delivery system (END), although it is noted that the presence of nicotine in the aerosol-generating material is not a requirement.
  • END electronic nicotine delivery system
  • the non-combustible aerosol provision system is an aerosol-generating material heating system, also known as a heat-not-burn system.
  • a heat-not-burn system is a tobacco heating system.
  • the non-combustible aerosol provision system is a hybrid system to generate aerosol using a combination of aerosol-generating materials, one or a plurality of which may be heated.
  • Each of the aerosol-generating materials may be, for example, in the form of a solid, liquid or gel and may or may not contain nicotine.
  • the hybrid system comprises a liquid or gel aerosol-generating material and a solid aerosol-generating material.
  • the solid aerosolgenerating material may comprise, for example, tobacco or a non-tobacco product.
  • the non-combustible aerosol provision system may comprise a non-combustible aerosol provision device and a consumable for use with the non-combustible aerosol provision device.
  • the disclosure relates to consumables comprising aerosol-generating material and configured to be used with non-combustible aerosol provision devices. These consumables are sometimes referred to as articles throughout the disclosure.
  • the non-combustible aerosol provision system such as a non-combustible aerosol provision device thereof, may comprise a power source and a controller.
  • the power source may, for example, be an electric power source or an exothermic power source.
  • the exothermic power source comprises a carbon substrate which may be energised so as to distribute power in the form of heat to an aerosol-generating material or to a heat transfer material in proximity to the exothermic power source.
  • the non-combustible aerosol provision system may comprise an area for receiving the consumable, an aerosol generator, an aerosol generation area, a housing, a mouthpiece, a filter and/or an aerosol-modifying agent.
  • the consumable for use with the non-combustible aerosol provision device may comprise aerosol-generating material, an aerosol-generating material storage area, an aerosolgenerating material transfer component, an aerosol generator, an aerosol generation area, a housing, a wrapper, a filter, a mouthpiece, and/or an aerosol-modifying agent.
  • the delivery system is an aerosol-free delivery system that delivers at least one substance to a user orally, nasally, transdermally or in another way without forming an aerosol, including but not limited to, lozenges, gums, patches, articles comprising inhalable powders, and oral products such as oral tobacco which includes snus or moist snuff, wherein the at least one substance may or may not comprise nicotine.
  • the substance to be delivered may be an aerosol-generating material or a material that is not intended to be aerosolised.
  • either material may comprise one or more active constituents, one or more flavours, one or more aerosol-former materials, and/or one or more other functional materials.
  • the substance to be delivered comprises an active substance.
  • the active substance as used herein may be a physiologically active material, which is a material intended to achieve or enhance a physiological response.
  • the active substance may for example be selected from nutraceuticals, nootropics, psychoactives.
  • the active substance may be naturally occurring or synthetically obtained.
  • the active substance may comprise for example nicotine, caffeine, taurine, theine, vitamins such as B6 or B12 or C, melatonin, cannabinoids, or constituents, derivatives, or combinations thereof.
  • the active substance may comprise one or more constituents, derivatives or extracts of tobacco, cannabis or another botanical.
  • the active substance comprises nicotine. In some embodiments, the active substance comprises caffeine, melatonin or vitamin B12.
  • the active substance may comprise one or more constituents, derivatives or extracts of cannabis, such as one or more cannabinoids or terpenes.
  • the active substance may comprise or be derived from one or more botanicals or constituents, derivatives or extracts thereof.
  • botanical includes any material derived from plants including, but not limited to, extracts, leaves, bark, fibres, stems, roots, seeds, flowers, fruits, pollen, husk, shells or the like.
  • the material may comprise an active compound naturally existing in a botanical, obtained synthetically.
  • the material may be in the form of liquid, gas, solid, powder, dust, crushed particles, granules, pellets, shreds, strips, sheets, or the like.
  • Example botanicals are tobacco, eucalyptus, star anise, hemp, cocoa, cannabis, fennel, lemongrass, peppermint, spearmint, rooibos, chamomile, flax, ginger, ginkgo biloba, hazel, hibiscus, laurel, licorice (liquorice), matcha, mate, orange skin, papaya, rose, sage, tea such as green tea or black tea, thyme, clove, cinnamon, coffee, aniseed (anise), basil, bay leaves, cardamom, coriander, cumin, nutmeg, oregano, paprika, rosemary, saffron, lavender, lemon peel, mint, juniper, elderflower, vanilla, Wintergreen, beefsteak plant, curcuma, turmeric, sandalwood, cilantro, bergamot, orange blossom, myrtle, cassis, valerian, pimento, mace, damien, marjoram, olive, lemon
  • the mint may be chosen from the following mint varieties: Mentha Arventis, Mentha c.v., Mentha niliaca, Mentha piperita, Mentha piperita citrata c.v., Mentha piperita c.v, Mentha spicata crispa, Mentha cardifolia, Memtha longifolia, Mentha suaveolens variegata, Mentha pulegium, Mentha spicata c.v. and Mentha suaveolens.
  • the active substance comprises or is derived from one or more botanicals or constituents, derivatives or extracts thereof and the botanical is tobacco. In some embodiments, the active substance comprises or derived from one or more botanicals or constituents, derivatives or extracts thereof and the botanical is selected from eucalyptus, star anise, cocoa and hemp.
  • the active substance comprises or derived from one or more botanicals or constituents, derivatives or extracts thereof and the botanical is selected from rooibos and fennel.
  • the substance to be delivered comprises a flavour.
  • flavour and “flavourant” refer to materials which, where local regulations permit, may be used to create a desired taste, aroma or other somatosensorial sensation in a product for adult consumers.
  • flavour materials may include naturally occurring flavour materials, botanicals, extracts of botanicals, synthetically obtained materials, or combinations thereof (e.g., tobacco, cannabis, licorice (liquorice), hydrangea, eugenol, Japanese white bark magnolia leaf, chamomile, fenugreek, clove, maple, matcha, menthol, Japanese mint, aniseed (anise), cinnamon, turmeric, Indian spices, Asian spices, herb, Wintergreen, cherry, berry, red berry, cranberry, peach, apple, orange, mango, clementine, lemon, lime, tropical fruit, papaya, rhubarb, grape, durian, dragon fruit, cucumber, blueberry, mulberry, citrus fruits, Drambuie, bourbon, scotch, whiskey, gin, tequila, rum, spearmint, peppermint, lavender, aloe vera, cardamom, celery, cascarilla, nutmeg, sandalwood, bergamot,
  • the flavour comprises menthol, spearmint and/or peppermint.
  • the flavour comprises flavour components of cucumber, blueberry, citrus fruits and/or redberry.
  • the flavour comprises eugenol.
  • the flavour comprises flavour components extracted from tobacco.
  • the flavour comprises flavour components extracted from cannabis.
  • the flavour may comprise a sensate, which is intended to achieve a somatosensorial sensation which are usually chemically induced and perceived by the stimulation of the fifth cranial nerve (trigeminal nerve), in addition to or in place of aroma or taste nerves, and these may include agents providing heating, cooling, tingling, numbing effect.
  • a suitable heat effect agent may be, but is not limited to, van illyl ethyl ether and a suitable cooling agent may be, but not limited to eucolyptol, WS-3.
  • Aerosol-generating material is a material that is capable of generating aerosol, for example when heated, irradiated or energized in any other way. Aerosol-generating material may, for example, be in the form of a solid, liquid or gel which may or may not contain an active substance and/or flavourants. In some embodiments, the aerosol-generating material may comprise an “amorphous solid”, which may alternatively be referred to as a “monolithic solid” (i.e. non-fibrous). In some embodiments, the amorphous solid may be a dried gel. The amorphous solid is a solid material that may retain some fluid, such as liquid, within it. In some embodiments, the aerosol-generating material may for example comprise from about 50wt%, 60wt% or 70wt% of amorphous solid, to about 90wt%, 95wt% or 100wt% of amorphous solid.
  • the aerosol-generating material may comprise one or more active substances and/or flavours, one or more aerosol-former materials, and optionally one or more other functional material. Aerosol-former material
  • the aerosol-former material may comprise one or more constituents capable of forming an aerosol.
  • the aerosol-former material may comprise one or more of glycerol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1 ,3-butylene glycol, erythritol, meso- Erythritol, ethyl vanillate, ethyl laurate, a diethyl suberate, triethyl citrate, triacetin, a diacetin mixture, benzyl benzoate, benzyl phenyl acetate, tributyrin, lauryl acetate, lauric acid, myristic acid, and propylene carbonate.
  • the one or more other functional materials may comprise one or more of pH regulators, colouring agents, preservatives, binders, fillers, stabilizers, and/or antioxidants.
  • the material may be present on or in a support, to form a substrate.
  • the support may, for example, be or comprise paper, card, paperboard, cardboard, reconstituted material, a plastics material, a ceramic material, a composite material, glass, a metal, or a metal alloy.
  • the support comprises a susceptor.
  • the susceptor is embedded within the material. In some alternative embodiments, the susceptor is on one or either side of the material.
  • a consumable is an article comprising or consisting of aerosol-generating material, part or all of which is intended to be consumed during use by a user.
  • a consumable may comprise one or more other components, such as an aerosol-generating material storage area, an aerosol-generating material transfer component, an aerosol generation area, a housing, a wrapper, a mouthpiece, a filter and/or an aerosol-modifying agent.
  • a consumable may also comprise an aerosol generator, such as a heater, that emits heat to cause the aerosol-generating material to generate aerosol in use.
  • the heater may, for example, comprise combustible material, a material heatable by electrical conduction, or a susceptor.
  • a susceptor is a material that is heatable by penetration with a varying magnetic field, such as an alternating magnetic field.
  • the susceptor may be an electrically-conductive material, so that penetration thereof with a varying magnetic field causes induction heating of the heating material.
  • the heating material may be magnetic material, so that penetration thereof with a varying magnetic field causes magnetic hysteresis heating of the heating material.
  • the susceptor may be both electrically-conductive and magnetic, so that the susceptor is heatable by both heating mechanisms.
  • the device that is configured to generate the varying magnetic field is referred to as a magnetic field generator, herein.
  • An aerosol-modifying agent is a substance, typically located downstream of the aerosol generation area, that is configured to modify the aerosol generated, for example by changing the taste, flavour, acidity or another characteristic of the aerosol.
  • the aerosol-modifying agent may be provided in an aerosol-modifying agent release component, that is operable to selectively release the aerosolmodifying agent.
  • the aerosol-modifying agent may, for example, be an additive or a sorbent.
  • the aerosol-modifying agent may, for example, comprise one or more of a flavourant, a colourant, water, and a carbon adsorbent.
  • the aerosol-modifying agent may, for example, be a solid, a liquid, or a gel.
  • the aerosol-modifying agent may be in powder, thread or granule form.
  • the aerosol-modifying agent may be free from filtration material.
  • An aerosol generator is an apparatus configured to cause aerosol to be generated from the aerosolgenerating material.
  • the aerosol generator is a heater configured to subject the aerosol-generating material to heat energy, so as to release one or more volatiles from the aerosol-generating material to form an aerosol.
  • the aerosol generator is configured to cause an aerosol to be generated from the aerosol-generating material without heating.
  • the aerosol generator may be configured to subject the aerosol-generating material to one or more of vibration, increased pressure, or electrostatic energy.
  • aerosol delivery systems (which may also be referred to as vapour delivery systems) such as nebulisers or e-cigarettes.
  • e- cigarette or “electronic cigarette” may sometimes be used, but it will be appreciated this term may be used interchangeably with aerosol delivery system I device and electronic aerosol delivery system I device.
  • aerosol delivery systems such as nebulisers or e-cigarettes.
  • vapour delivery systems such as nebulisers or e-cigarettes.
  • e- cigarette or “electronic cigarette” may sometimes be used, but it will be appreciated this term may be used interchangeably with aerosol delivery system I device and electronic aerosol delivery system I device.
  • aerosol and vapour and related terms such as “vaporise”, “volatilise” and “aerosolise” may generally be used interchangeably.
  • Aerosol delivery systems e-cigarettes
  • a modular assembly comprising a reusable device part and a replaceable (disposable/consumable) cartridge part.
  • the replaceable cartridge part will comprise the aerosol generating material and the vaporiser (which may collectively be called a ‘cartomizer’) and the reusable device part will comprise the power supply (e.g. rechargeable power source) and control circuitry.
  • the reusable device part will often comprise a user interface for receiving user input and displaying operating status characteristics
  • the replaceable cartridge device part in some cases comprises a temperature sensor for helping to control temperature.
  • Cartridges are electrically and mechanically coupled to the control unit for use, for example using a screw thread, bayonet, or magnetic coupling with appropriately arranged electrical contacts.
  • the cartridge may be removed from the reusable part and a replacement cartridge attached in its place.
  • Systems and devices conforming to this type of two-part modular configuration may generally be referred to as two-part systems/devices.
  • certain embodiments of the disclosure are based on aerosol delivery systems which are operationally configured to provide functionality in accordance with the principles described herein and the constructional aspects of systems configured to provide the functionality in accordance with certain embodiments of the disclosure is not of primary significance.
  • the present invention provides an aerosol delivery subsystem for an aerosol delivery system, comprising: an inlet; an outlet; and a baffle configured to move and thereby modify fluid flow along a flow path between the inlet and the outlet in use, in response to fluid being drawn along the flow path.
  • the present invention also provides an aerosol delivery subsystem comprising: an inlet means; an outlet means; and baffle means configured to move and thereby modify fluid flow along a flow path between the inlet and the outlet, in response to fluid being drawn along the flow path.
  • the present invention also provides a method of manufacturing an aerosol delivery subsystem, comprising providing: an inlet; an outlet; and a baffle configured to move and thereby modify fluid flow along a flow path between the inlet and the outlet in use, in response to fluid being drawn along the flow path.
  • the present invention also provides a method of modifying fluid flow along a flow path between an inlet and an outlet of an aerosol delivery subsystem, the method comprising: moving a baffle in response to fluid being drawn along the flow path.
  • the present invention also provides preferred embodiments as claimed in the dependent claims.
  • the claimed invention generally provides a sub-assembly or subsystem suitable for use in an aerosol delivery system, or configured for use in an aerosol delivery system.
  • the subsystem may generally form part of an aerosol delivery system and in particular may form part of the reusable device and/or the consumable cartridge.
  • the claimed invention may advantageously provide manually and/or automatically adjustable operating characteristics to target certain characteristics which may be desirable to a user.
  • Figure 1 is a schematic cross-section view of an aerosol delivery system in accordance with some embodiments of the disclosure
  • Figure 2a is a schematic cross-section view of the air inlet region of the aerosol delivery system of Figure 1 (shown dashed in Figure 1), showing an aerosol delivery subsystem in accordance with some embodiments of the disclosure;
  • Figure 2b is an enlarged schematic cross-section view of the baffle of Figure 2a;
  • Figure 2c is a schematic top-down view of the aperture in the baffle of Figures 2a-2b;
  • FIGS 3a-3h are schematic cross-section views of the air inlet region of the aerosol delivery system of Figure 1 (shown dashed in Figure 1), showing various aerosol delivery subsystems in accordance with some embodiments of the disclosure;
  • Figure 3i is a schematic perspective view of the collar shown in Figure 3h.
  • FIG. 1 is a cross-sectional view through an example aerosol delivery system 1 in accordance with certain embodiments of the disclosure.
  • the aerosol delivery system 1 comprises two main components, namely a reusable part 2 and a replaceable I disposable consumable cartridge part 4. In normal use, the reusable part 2 and the cartridge part 4 are releasably coupled together at an interface 6.
  • the cartridge part 4 When the cartridge part 4 is exhausted or the user simply wishes to switch to a different cartridge part 4, the cartridge part 4 may be removed from the reusable part 2 and a replacement cartridge part 4 attached to the reusable part 2 in its place.
  • the interface 6 provides a structural, electrical and airflow path connection between the two parts 2, 4 and may be established in accordance with conventional techniques, for example based around a screw thread, magnetic or bayonet fixing with appropriately arranged electrical contacts and openings for establishing the electrical connection and airflow path between the two parts 2, 4 as appropriate.
  • the specific manner by which the cartridge part 4 mechanically mounts to the reusable part 2 is not significant to the principles described herein, but for the sake of a concrete example is assumed here to comprise a magnetic coupling (not represented in Figure 1).
  • the interface 6 in some implementations may not support an electrical and I or airflow path connection between the respective parts 2, 4.
  • an aerosol generator may be provided in the reusable part 2 rather than in the cartridge part 4, or the transfer of electrical power from the reusable part 2 to the cartridge part 4 may be wireless (e.g. based on electromagnetic induction), so that an electrical connection between the reusable part 2 and the cartridge part 4 is not needed.
  • the airflow through the electronic cigarette might not go through the reusable part 2, so that an airflow path connection between the reusable part 2 and the cartridge part 4 is not needed.
  • a portion of the airflow path may be defined at the interface between portions of the reusable part 2 and cartridge part 4 when these are coupled together for use.
  • the cartridge I consumable part 4 may in accordance with certain embodiments of the disclosure be broadly conventional.
  • the cartridge part 4 comprises a cartridge housing 42 formed of a plastics material.
  • the cartridge housing 42 supports other components of the cartridge part 4 and provides the mechanical interface 6 with the reusable part 2.
  • the cartridge housing 42 is generally circularly symmetric about a longitudinal axis along which the cartridge part 4 couples to the reusable part 2.
  • the cartridge part 4 has a length of around 4 cm and a diameter of around 1 .5 cm.
  • the specific geometry, and more generally the overall shapes and materials used, may be different in different implementations.
  • the reservoir 44 stores a supply of liquid aerosol generating material.
  • the liquid reservoir 44 has an annular shape with an outer wall defined by the cartridge housing 42 and an inner wall that defines an airflow path 52 through the cartridge part 4.
  • the reservoir 44 is closed at each end with end walls to contain the aerosol generating material.
  • the reservoir 44 may be formed in accordance with conventional techniques, for example it may comprise a plastics material and be integrally moulded with the cartridge housing 42.
  • the cartridge / consumable part 4 further comprises an aerosol generator 48 located towards an end of the reservoir 44 opposite to a mouthpiece outlet 50.
  • the aerosol generator 48 may be in either of the reusable part 2 or the cartridge part 4.
  • the aerosol generator 48 e.g. a heater, which may be in the form of a wick and coil arrangement as shown, a distiller, which may be formed from a sintered metal fibre material or other porous conducting material, or any suitable alternative aerosol generator
  • the reusable part 2 may be comprised in the reusable part 2, and is brought into proximity with a portion of aerosol generating material in the cartridge part 4 when the cartridge part 4 is engaged with the reusable part 2.
  • the cartridge part 4 may comprise a portion of aerosol generating material, and an aerosol generator 48 comprising a heater is at least partially inserted into or at least partially surrounds the portion of aerosol generating material as the cartridge part 4 is engaged with the reusable part 2.
  • a wick 46 in contact with the aerosol generator 48 extends transversely across the cartridge airflow path 52 with its ends extending into the reservoir 44 of the liquid aerosol generating material through openings in the inner wall of the reservoir 44.
  • the openings in the inner wall of the reservoir 44 are sized to broadly match the dimensions of the wick 46 to provide a reasonable seal against leakage from the liquid reservoir 44 into the cartridge airflow path without unduly compressing the wick 46, which may be detrimental to its fluid transfer performance.
  • the wick 46 and aerosol generator 48 are arranged in the cartridge airflow path 52 such that a region of the cartridge airflow path 52 around the wick 46 and heater 48 in effect defines a vaporisation region for the cartridge part 4.
  • Aerosol generating material in the reservoir 44 infiltrates the wick 46 through the ends of the wick extending into the reservoir 44 and is drawn along the wick by surface tension I capillary action (i.e. wicking).
  • the aerosol generator 48 in this example comprises an electrically resistive wire coiled around the wick 46.
  • the heater 48 comprises a nickel chrome alloy (Cr20Ni80) wire and the wick 46 comprises a glass fibre bundle, but it will be appreciated the specific aerosol generator configuration is not significant to the principles described herein.
  • electrical power may be supplied to the aerosol generator 48 to vaporise an amount of aerosol generating material (aerosol generating material) drawn to the vicinity of the aerosol generator 48 by the wick 46. Vaporised aerosol generating material may then become entrained in air drawn along the cartridge airflow path from the vaporisation region towards the mouthpiece outlet 50 for user inhalation.
  • aerosol generating material aerosol generating material
  • the rate at which aerosol generating material is vaporised by the aerosol generator 48 will depend on the amount (level) of power supplied to the aerosol generator 48.
  • electrical power can be applied to the aerosol generator 48 to selectively generate aerosol from the aerosol generating material in the cartridge part 4, and furthermore, the rate of aerosol generation can be changed by changing the amount of power supplied to the aerosol generator 48, for example through pulse width and/or frequency modulation techniques.
  • the reusable part 2 comprises an outer housing 12 having with an opening that defines an air inlet 28 for the e-cigarette, a power source 26 (for example a battery) for providing operating power for the electronic cigarette, control circuitry I controller 22 for controlling and monitoring the operation of the electronic cigarette, a first user input button 14, a second user input button 16, and a visual display 24.
  • a power source 26 for example a battery
  • the aerosol delivery system 1 of Figure 1 further comprises a subsystem used to vary the flow of fluid through the system in the form of the consumable part 4 comprising a baffle 60 across the air inlet 28.
  • the baffle 60 is configured to move and thereby modify fluid flow along the flow path 52 between the inlet 28 and the outlet 50 in use, in response to fluid being drawn along the flow path 52.
  • the baffle 60 is described in further detail with respect to Figure 2 below.
  • the outer housing 12 may be formed, for example, from a plastics or metallic material and in this example has a circular cross section generally conforming to the shape and size of the cartridge part 4 so as to provide a smooth transition between the two parts 2, 4 at the interface 6.
  • the reusable part 2 has a length of around 8 cm so the overall length of the e-cigarette when the cartridge part 4 and the reusable part 2 are coupled together is around 12 cm.
  • the overall shape and scale of an electronic cigarette implementing an embodiment of the disclosure is not significant to the principles described herein.
  • the air inlet 28 connects to an airflow path 51 through the reusable part 2.
  • the reusable part airflow path 51 in turn connects to the cartridge airflow path 52 across the interface 6 when the reusable part 2 and cartridge part 4 are connected together.
  • air is drawn in through the air inlet 28, along the reusable part airflow path 51 , across the interface 6, through the aerosol generation area in the vicinity of the aerosol generator 48 (where vaporised aerosol generating material becomes entrained in the air flow), along the cartridge airflow path 52, and out through the mouthpiece opening 50 for user inhalation.
  • the power source 26 in this example is rechargeable and may be of a conventional type, for example of the kind normally used in electronic cigarettes and other applications requiring provision of relatively high currents over relatively short periods.
  • the power source 26 may be recharged through a charging connector in the reusable part housing 12, for example a USB connector.
  • First and/or second user input buttons 14, 16 may be provided, which in this example are conventional mechanical buttons, for example comprising a spring mounted component which may be pressed by a user to establish an electrical contact.
  • the input buttons may be considered input devices for detecting user input and the specific manner in which the buttons are implemented is not significant.
  • the buttons may be assigned to functions such as switching the aerosol delivery system 1 on and off, and adjusting user settings such as a power to be supplied from the power source 26 to the aerosol generator 48.
  • the inclusion of user input buttons is optional, and in some embodiments buttons may not be included.
  • a display 24 may be provided to give a user with a visual indication of various characteristics associated with the aerosol delivery system, for example current power setting information, remaining power source power, and so forth.
  • the display may be implemented in various ways.
  • the display 24 comprises a conventional pixilated LCD screen that may be driven to display the desired information in accordance with conventional techniques.
  • the display may comprise one or more discrete indicators, for example LEDs, that are arranged to display the desired information, for example through particular colours and I or flash sequences. More generally, the manner in which the display 24 is provided and information is displayed to a user using the display is not significant to the principles described herein.
  • some embodiments may not include a visual display and/or may include other means for providing a user with information relating to operating characteristics of the aerosol delivery system, for example using audio signalling, or may not include any means for providing a user with information relating to operating characteristics of the aerosol delivery system.
  • a controller 22 is suitably configured I programmed to control the operation of the aerosol delivery system 1 to provide functionality in accordance with embodiments of the disclosure as described further herein, as well as for providing conventional operating functions of the aerosol delivery system 1 in line with the established techniques for controlling such devices.
  • the controller (processor circuitry) 22 may be considered to logically comprise various sub-units I circuitry elements associated with different aspects of the operation of the aerosol delivery system 1 .
  • the controller 22 comprises power supply control circuitry for controlling the supply of power from the power source 26 to the aerosol generator 48 in response to user input, user programming circuitry 20 for establishing configuration settings (e.g.
  • controller 22 can be provided in various different ways, for example using one or more suitably programmed programmable computer(s) and I or one or more suitably configured application-specific integrated circuit(s) I circuitry I chip(s) I chipset(s) configured to provide the desired functionality.
  • the controller 26 may comprise an application specific integrated circuit (ASIC) or microcontroller, for controlling the aerosol delivery device.
  • ASIC application specific integrated circuit
  • the microcontroller or ASIC may include a CPU or micro-processor.
  • the operations of a CPU and other electronic components are generally controlled at least in part by software programs running on the CPU (or other component).
  • software programs may be stored in nonvolatile memory, such as ROM, which can be integrated into the microcontroller itself, or provided as a separate component.
  • the CPU may access the ROM to load and execute individual software programs as and when required.
  • the reusable part 2 comprises an airflow sensor 30 which is electrically connected to the controller 22.
  • the airflow sensor 30 comprises a so-called “puff sensor”, in that the airflow sensor 30 is used to detect when a user is puffing on the device.
  • the airflow sensor 30 comprises a switch in an electrical path providing electrical power from the power source 26 to the aerosol generator 48.
  • the airflow sensor 30 generally comprises a pressure sensor configured to close the switch when subjected to a particular range of pressures, enabling current to flow from the power source 26 to the aerosol generator 48 once the pressure in the vicinity of the airflow sensor 30 drops below a threshold value.
  • the threshold value can be set to a value determined by experimentation to correspond to a characteristic value associated with the initiation of a user puff.
  • the airflow sensor 30 is connected to the controller 22, and the controller distributes electrical power from the power source 26 to the aerosol generator 48 in dependence of a signal received from the airflow sensor 30 by the controller 22.
  • the specific manner in which the signal output from the airflow sensor 30 (which may comprise a measure of capacitance, resistance or other characteristic of the airflow sensor, made by the controller 22) is used by the controller 22 to control the supply of power from the power source 26 to the aerosol generator 48 can be carried out in accordance with any approach known to the skilled person.
  • the airflow sensor 30 is mounted to a printed circuit board 31 as described further herein, but this is not essential.
  • the airflow sensor 30 may comprise any sensor which is configured to determine a characteristic of airflow in an airflow path 51 disposed between air inlet 28 and mouthpiece opening 50, for example a pressure sensor or transducer (for example a membrane or solid-state pressure sensor), a combined temperature and pressure sensor, or a microphone (for example an electret-type microphone), which is sensitive to changes in air pressure, including acoustical signals.
  • the airflow sensor 30 is situated within a sensor cavity 32, which comprises the interior space defined by one or more chamber walls 34.
  • the sensor cavity 32 may also be referred to herein as a sensor chamber 32 (these terms may be used interchangeably), and comprises a region internal to one or more chamber walls 34 in which an airflow sensor 30 can be fully or partially situated.
  • the airflow sensor 30 is mounted to a printed circuit board (PCB) 31 , which comprises one of the chamber walls of a sensor housing comprising the sensor chamber I cavity 32.
  • PCB printed circuit board
  • a deformable membrane is disposed across an opening communicating between the sensor cavity 32 containing the sensor 30, and a portion of the airflow path disposed between air inlet 28 and mouthpiece opening 50.
  • the deformable membrane covers the opening, and is attached to one or more of the chamber walls according to approaches described further herein.
  • the aerosol delivery system 1 comprises communication circuitry configured to enable a connection to be established with one or more further electronic devices (for example, a storage I charging case, and / or a refill I charging dock) to enable data transfer between the aerosol delivery system 1 and further electronic device(s).
  • the communication circuitry is integrated into controller 22, and in other embodiments it is implemented separately (comprising, for example, separate application-specific integrated circuit(s) I circuitry I chip(s) I chipset(s)).
  • the communication circuitry may comprise a separate module to the controller 22 which, while connected to controller 22, provides dedicated data transfer functionality for the aerosol delivery device.
  • the communication circuitry is configured to support communication between the aerosol delivery system 1 and one or more further electronic devices over a wireless interface.
  • the communication circuitry may be configured to support wireless communications between the aerosol delivery system 1 and other electronic devices such as a case, a dock, a computing device such as a smartphone or PC, a base station supporting cellular communications, a relay node providing an onward connection to a base station, a wearable device, or any other portable or fixed device which supports wireless communications.
  • other electronic devices such as a case, a dock, a computing device such as a smartphone or PC, a base station supporting cellular communications, a relay node providing an onward connection to a base station, a wearable device, or any other portable or fixed device which supports wireless communications.
  • Wireless communications between the aerosol delivery system 1 and a further electronic device may be configured according to known data transfer protocols such as Bluetooth®, ZigBee, WiFi®, Wifi Direct, GSM, 2G, 3G, 4G, 5G, LTE, NFC, RFID. More generally, it will be appreciated that any wireless network protocol can in principle be used to support wireless communication between the aerosol delivery system 1 and further electronic devices.
  • the communication circuitry is configured to support communication between the aerosol delivery system 1 and one or more further electronic devices over a wired interface. This may be instead of or in addition to the configuration for wireless communications set out above.
  • the communication circuitry may comprise any suitable interface for wired data connection, such as USB-C, micro-USB or Thunderbolt interfaces.
  • the communication circuitry may comprise any wired communication interface which enables the transfer of data, according to, for example, a packet data transfer protocol, and may comprise pin or contact pad arrangements configured to engage cooperating pins or contact pads on a dock, case, cable, or other external device which can be connected to the aerosol delivery system 1 .
  • Figure 2a is a schematic cross-section view of the air inlet region of the aerosol delivery system 1 of Figure 1 (shown dashed in Figure 1), illustrating the features of the aerosol delivery subsystem comprising the baffle 60 across the inlet 28 in Figure 1 in more detail.
  • Figure 2b is an enlarged schematic cross-section view of the baffle 60 of Figure 2a.
  • the baffle 60 on the consumable part 4 comprises a flexible resilient membrane 60 having an aperture 61 .
  • the baffle 60 is within and spans the air inlet 28 whilst the aperture 61 provides an opening to the flow path 52 for fluid flowing from the air inlet 28 to the outlet 50, via the aerosol generator 48.
  • Said fluid typically contains incoming air from the air inlet 28 and aerosol entrained therein from the aerosol generator 48, and is drawn along the flow path in use, e.g. when a user inhales (or exhales) on the outlet 50.
  • the remainder of the baffle 60 effectively restricts or obstructs air flow through the air inlet 28 and thus along the flow path 52.
  • air inlet 28 and aperture 61 Although only one air inlet 28 and aperture 61 are shown here, multiple air inlets 28 and I or apertures 61 may be provided, to provide greater air flow in use and/or to provide air flow even if a user inadvertently covers one of the air inlets 28 and I or apertures 61 , e.g. with a finger.
  • the baffle 60 is shown to be internal, within the inlet 28, flush with the reusable part 2 and consumable part 4, but in other embodiments the baffle 60 may be more generally positioned anywhere suitable for modifying the fluid flow, such as proximal to the air inlet 28, including external to and upstream of the air inlet 28, or alternatively generally within or proximal to the flow path 52, i.e. downstream from the air inlet 28 in the flow path 52.
  • the proximity to the air inlet 28 or flow path 52 must be such that the baffle 60 impacts the air flow therethrough and includes, but is not limited to being, adjacent thereto. Various such other arrangements are described later with reference to Figures 3a-3h.
  • the flexible, resilient nature of the membrane 60 allows the baffle 60 to move by temporarily deflecting and/or deforming, altering the size of the aperture 61 when fluid is drawn along the flow path 52, e.g. when the user inhales (or exhales) on the outlet 50. When inhaling occurs, this reduces the fluid pressure in the flow path 52 and thus draws air in through the air inlet 28 via the aperture 61 in the baffle 60 and draws aerosol to the user.
  • the baffle 60 comprises a flexible membrane 60 as here, then when the user inhales, the drop in pressure in the flow path 52 creates a pressure differential from ambient pressure across the flow path 52 and causes the baffle 60 to be sucked into the air inlet 28, stretching the membrane and thereby opening the aperture 61 further, increasing the effective cross-sectional area of the flow path 52 and reducing the restriction/obstruction of air flow into the air inlet 28, thus altering the ventilation and hence fluid flow through the air inlet 28 and along the flow path 52 to the outlet 50.
  • the resilient nature of the membrane 60 means that it returns to its original, non-deformed shape when the pressure differential is removed.
  • operating pressure differentials range between about 98-1471 Pa (10-150 mm H2O), and an ideal operating pressure is around 686-785 Pa (70-80 mm H2O).
  • Maximum operating pressure differentials could be > 1961 Pa (200mm H2O), such as between about 2942 Pa - 3923 Pa (300-400 mm H2O), although such high pressure differentials would in practice be difficult for users to draw a puff.
  • the baffle 60 may be configured to modify a fluid pressure differential between a fluid pressure in the flow path 52 and ambient, the differential being about 98- 1961 Pa (10-200 mm H2O), preferably about 294-981 Pa (30-100 mm H2O), more preferably about 294-686 Pa (30-70 mm H 2 O), 588-785 Pa (60-80 mm H 2 O), 588-883 Pa (60-90 mm H 2 O), 686-883 Pa (70-90 mm H 2 O), 785-981 Pa (80-100 mm H 2 O) or 686-785 Pa (70-80 mm H 2 O).
  • the membrane material may be chosen to provide desirable movement / fluid pressure differential by deflection and/or deformation and said movement may be proportional to the fluid pressure differential caused by the user inhaling or exhaling on the outlet.
  • the material may be sufficiently stiff to move only when the pressure differential exceeds a threshold.
  • fluid properties such as fluid pressure, temperature, density, viscosity, velocity and/or degree of turbulence (Reynolds number) may be altered by the configuration of the baffle 60 and the movement thereof, varying ventilation through the system.
  • Many of these fluid properties are related to one another - for example, under the conservation of energy (Bernoulli effect), fluid pressure reduces where flow velocity is increased; and the viscosity of air principally depends on temperature.
  • these properties of fluid in the flow path 52 can differ to ambient air and impact the entrainment of aerosol and/or the delivery of aerosol to the user, altering the sensory experience.
  • variable ventilation can also be used to adjust the draw resistance of the e-cigarette.
  • the lungs in effect work against the draw resistance, i.e. the work required to pull air into and then through the e-cigarette into the lungs.
  • draw resistance i.e. the work required to pull air into and then through the e-cigarette into the lungs.
  • draw resistance i.e. the work required to pull air into and then through the e-cigarette into the lungs.
  • draw resistance i.e. the work required to pull air into and then through the e-cigarette into the lungs.
  • draw resistance i.e. the work required to pull air into and then through the e-cigarette into the lungs.
  • the baffle 60 can be configured to provide particular desirable effects dependent on user preferences.
  • the baffle 60 can have a particular shape, location or mode of operation I movement to modify one or more of the fluid properties of fluid flowing in the flow path 52 in use and the baffle 60 may be further configurable (e.g. further movable and/or adjustable) by the user to allow a greater range of adjustment.
  • the baffle 60 when the baffle 60 is external to (upstream from) the air inlet 28, this makes further user adjustment by the user easier as the baffle 60 is more readily accessible.
  • the user can actuate an input such as a dial or button 14, 16 on the device for adjustment of the fluid flow.
  • the subsystem may modify the fluid flow dependent on the user’s draw strength automatically, e.g. actuating the baffle 60 based on the draw, such as providing a unique adjustment forthat particular user based on their typical (average) puff, or even based on the particular draw.
  • the baffle 60 has multiple preconfigured starting positions selectable by a user, allowing adjustment of the range of movement of the baffle 60 from the starting position chosen.
  • the baffle 60 may have a length extending into the flow path 52 corresponding to half the width of the air inlet 28, and have a first starting position enabling the baffle 60 to cover between 0-50% of the width of the air inlet 28, and a second position enabling the baffle 60 to cover only between 0-25% of the width of the air inlet 28, with the remaining portion of the baffle 60 being recessed in the consumable part 4, or equally the reusable part 2.
  • the consumable part 4 comprises the baffle in Figure 1
  • the reusable part 2 may instead comprise the baffle 60, or the baffle 60 may be an integral component of a singlepart non-modular ‘throwaway’ system.
  • Figure 2c is a schematic top-down view of the aperture 61 in the flexible membrane baffle 60 in Figures 2a-2b and illustrates how the aperture 61 may deform, enlarging as pressure in the flow path 52 decreases (or increases) when the user inhales (or exhales) on the outlet 50.
  • the aperture 61 is variable in size due to the flexible nature of the membrane baffle 60.
  • the nominal diameter do of the flow path through the aperture 61 is within the ranges 0.1-2.0mm, 0.25-1 ,5mm or 0.5-1 .0mm in diameter.
  • the membrane baffle 60 may be suitably flexible to move by deflecting or deforming to provide a design maximum enlarged aperture diameter ds (e.g. when a pressure differential across the aperture 61 is equal to ambient pressure) within the ranges 0.5-5.0mm, 0.75- 2.5mm, 1 .0-2.0mm or 1 .5-2.0mm.
  • the nominal to enlarged diameter range (do- ds) is 0.5-2.0 mm.
  • the baffle 60 may comprise one or more slits 62 instead of, or in addition to, one or more apertures 61 .
  • a slit beneficially allows greater deformation under pressure than an aperture, thus allowing more cross-sectional area variation for the same pressure differential range, and greater air flow therethrough when under pressure.
  • a slit may also be used to substantially seal the inlet at ambient pressure, e.g. when the device is not in use, preventing debris entering, but still allow deformation and hence air flow when under pressure.
  • Figure 2c illustrates two perpendicular, horizontal and vertical ‘crosshair’ slits 62 across the aperture 61 , to aid deformation. In other embodiments, any other slit arrangements may be used.
  • FIGS 3a-3h are schematic cross-section views of the air inlet region of the aerosol delivery system 1 of Figure 1 (shown dashed in Figure 1), showing various baffles 60 in different forms to the flexible membrane baffle 60 of Figures 1 -2b, with the other details of the subsystem (and optional wider system) not shown for clarity.
  • the baffle 60 may generally comprise a resilient element, a flexible membrane, a flap, an adjustable diaphragm of overlapping flaps (akin to a camera aperture opening), a valve, a biasing element, telescoping elements, a slider and/or a collar.
  • the baffle 60 may comprise a biasing element 63 to bias the baffle 60 into a predetermined configuration such as open, closed or anything in between.
  • the baffle 60 moves by translating or rotating to alter the obstruction to the flow path and the effective diameter / cross-sectional area of the air inlet 28 or the flow path 52, rather than by deflection I deformation as in Figures 1-2c.
  • the same ranges for the effective diameter / cross-sectional area of the air inlet 28 or the flow path 52 outlined above for the flexible membrane baffle 60 may also apply here.
  • FIG 3a illustrates the baffle 60 comprising a rigid slider 60 that is external to and upstream from the air inlet 28, whilst Figure 3b illustrates the baffle 60 comprising a rigid slider 60 which is downstream in the flow path 52 and at least partially receivable in the consumable part 4.
  • the baffle 60 can slide to alter the effective diameter / cross-sectional area of the air inlet 28 as per the flexible membrane embodiment of Figure 1-2c, but as the baffle 60 is solid, its movement is not predetermined by its material properties and so a drop in the fluid pressure in the flow path 52 does not necessarily cause notable deflection I deformation.
  • the rigid baffle 60 can be configured to move to increase the effective cross-sectional area of the flow path 52 and reduce the restriction/obstruction of air flow into the air inlet 28 when the user inhales, as per the flexible membrane embodiment, or conversely to decrease the effective cross-sectional area of the flow path 52.
  • the system 1 may be configured to trigger activation of the aerosol generator 48 and/or movement of the baffle 60 in response to fluid being drawn along the flow path 52, which may be detected by the flow sensor 30.
  • the rigid baffle 60 can be configured to continually adjust the effective cross-sectional area in accordance with a user profile or preferences, or a temporal profile. Such automation and granularity of the fluid flow adjustment provides an enhanced user experience.
  • FIG 3c illustrates a rigid slider baffle 60 external to, upstream and offset from the air inlet 28 by a static mount 65, the baffle 60 thereby always permitting air flow even when the baffle 60 is fully deployed across (spanning) the air inlet 28.
  • the baffle 60 may increase or decrease the effective length of the flow path 52. As shown in Figure 3c, movement of the baffle 60 toward the reusable part 2 effectively lengthens the air flow path 52, whilst movement of the baffle 60 toward the consumable part 4 and away from the reusable part 2 effectively shortens the air flow path.
  • FIG. 3d illustrates two baffles 60a, 60b, one on each of the reusable part 2 and the consumable part 4.
  • the baffles 60 may be configured to move independently or collectively and this provides greater freedom of movement.
  • the baffles 60 may be moved to alter the flow path towards the reusable part 2 and away from the consumable part 4, or vice versa, or moved cooperatively to reduce or enlarge a central aperture formed between the baffles
  • FIG. 3e illustrates the baffle 60 comprising a hinged flap, with a biasing element 63.
  • the baffle 60 moves by pivoting (rotating) to modify the fluid flow, and the baffle 60 is biased into a partially open configuration by the biasing element 63, to allow air flow into the inlet 28 and down the flow path 52 even when there is lower than ambient pressure in the flow path 52 (which might otherwise force the baffle 60 to close and fully obstruct the air inlet 28).
  • other or additional biasing elements 63 may be provided, for example to limit opening of the baffle 60, or to bias the baffle 60 into a closed position.
  • the cross-sectional area of the flow path can be modified similarly to the preceding ‘slider’ examples.
  • Figure 3f illustrates the baffle 60 comprising multiple telescoping elements 60. This arrangement provides a compact baffle 60 that can be readily extended/contracted to adjust fluid flow along the flow path 52. Although not shown, in some embodiments these elements 60 may comprise one or more apertures 61 to permit air flow therethrough even when the elements span the inlet 28.
  • Figure 3g illustrates the baffle 60 comprising a simple valve, having a T flow path therethrough, where the horizontal path of the T effectively provides two inlet apertures 28 which are adjustable in size (vertical height) as the baffle 60 moves vertically as shown.
  • An actuator 64 is shown for opening and closing the baffle 60 in response to fluid being drawn along the flow path 52.
  • Figure 3h illustrates the baffle 60 comprising a collar 60 located around a portion of the housing 12 in which two air inlets 28 are provided.
  • the collar 60 is shown in insolation in a perspective view in Figure 3i and is movable with respect to the housing 12.
  • the collar 60 moves with respect to the housing 12 in response to fluid being drawn along the flow path and the system comprises a mechanism such as an actuator 64 for positioning the collar 60 with respect to the housing 12 at any position or a plurality of predetermined positions as the collar 60 moves with respect to the housing 12, wherein different positions result in different degrees of alignment between the collar and the one or more air inlets 28, varying the air flow into the system.
  • the collar 60 positively engages with the housing 12, e.g. with a mechanical interlock using protrusions and/or recesses on the collar 60 and/or the housing 12, to secure the collar 60 in the predetermined position.
  • the collar 60 is shown to be external to the housing 12, but may instead be internal.
  • the collar 60 comprises multiple apertures 61 which are azimuthally spaced around the circumference of the collar 60.
  • Each aperture 61 allows air to flow through the collar in a radial direction, i.e. from outside the collar 60 to inside the collar 60, and the collar 60 is rotatable to vary alignment between the apertures 61 in the collar 60 and the air inlets 28.
  • the multiple apertures 61 can be arranged on the collar 60 so that in various predetermined positions of the collar 60 with respect to the housing 12, none, any subset of or all air inlets 28 are blocked or open. A similar arrangement is detailed further in WO 2016/012774, which is incorporated herein by reference.
  • apertures 61 may vary in size or taper, so that more granular variation and modification of air flow can be provided. Similar such arrangements are detailed further in WO 2017/046566, which is incorporated herein by reference. Protection may be sought for any features disclosed in any one or more published documents referenced herein in combination with the present disclosure.
  • the collar 60 is movable axially and radially, and is axially locatable in multiple substantially circumferential tracks around the housing 12, providing different degrees of overlap (e.g. 25%, 50%, 75%, 100%) between the apertures 61 and the inlets 28 as the collar 60 rotates about the housing 12 in the track.
  • This arrangement provides multiple, user- selectable positions for the collar 60 to vary the air flow range.
  • the housing 12 and/or collar 60 comprise complementary helical threads to provides said substantially circumferential tracks, permitting movement of the collar 60 axially and radially with respect to the housing 12 to vary the air flow. The user may optionally be able to further manually adjust the position of the collar with respect to the housing 12.
  • the collar 60 itself has no apertures 61 and moves only axially to vary coverage of the air inlet(s) 28.
  • the system 1 is configured to move the baffle 60 automatically in response to the sensor 30 detecting fluid being drawn along the flow path 52.
  • the sensor 30 may comprise a pressure sensor configured to detect a threshold pressure change, or measure the pressure of the fluid being drawn along the fluid flow path.
  • the sensor 30 may comprise a sensor configured to sense (measure) a property or characteristic of fluid being drawn along the flow path 52.
  • the system 1 may further comprise an actuator 64 (such as a motor, solenoid etc.) configured to move the baffle 60 in response to the sensor data (sensed property).
  • an actuator 64 such as a motor, solenoid etc.
  • the system can be configured to operate in a similar fashion to the Figure 1 embodiment, in which when the user inhales, the baffle 60 moves to increase the effective cross-sectional area of the flow path 52 and reduce the restriction I obstruction of air flow into the air inlet 28, thus altering the air flow through the air inlet 28 and along the flow path 52.
  • the baffle 60 may instead be configured to move to decrease the effective cross-sectional area of the flow path 52 and increase the restriction I obstruction of air flow into the air inlet 28, thus altering the air flow through the air inlet 28 and along the flow path 52 in the opposite manner to the membrane arrangement of Figure 1 , which may be desirable for some users.
  • the system may be configurable to operate in either manner, or any manner in between, such as providing a first effective cross-sectional area of the flow path 52 for a first predetermined period of time after detecting fluid flow or whilst a first property of the fluid flow (e.g. pressure) is below (or above) a first threshold, and thereafter increasing or decreasing the effective cross-sectional area, optionally for a second predetermined period of time or whilst the first or another property of the fluid is above (or below) a second threshold, to suit individual user preferences.
  • a first property of the fluid flow e.g. pressure
  • the fluid properties (the same or differing for each stage), thresholds (first and second being the same or differing), predetermined periods of time (first and second being the same or differing), ‘above’/’below’ and ‘increasing’/’decreasing’ conditions may be used, and may be configurable on the system by the user.
  • the baffle 60 when the airflow sensor 30 detects a user puffing on the system, the baffle 60 provides or moves to provide a first effective cross-sectional area of the flow path 52 for a predetermined time (or whilst a first property of the fluid (e.g. pressure) is below (or above) a first threshold), and subsequently the baffle 60 moves to provide a second effective cross-sectional area of the flow path 52 thereafter, which may optionally be for a predetermined time or until the first or another property of the fluid is above (or below) the first or a second threshold.
  • a first property of the fluid e.g. pressure
  • the baffle 60 when the sensor 30 detects fluid being drawn along the flow path 52, the baffle 60 is configured to: move to increase or decrease an effective cross-sectional area of the flow path 52; or provide a first effective cross-sectional area of the flow path 52 for a predetermined period of time; and then move to increase or decrease the effective cross-sectional area of the flow path 52.
  • the system may be configured to increase an effective cross-sectional area of the flow path 52 when a sensed property of fluid flowing in the flow path 52 is above or below a threshold; and/or decrease an effective cross-sectional area of the flow path 52 when a sensed property of fluid flowing in the flow path 52 is above or below a threshold.
  • the baffle 60 may be configured to provide a first effective cross-sectional area of the flow path 52 when a first sensed property of fluid flowing in the flow path 52 is above or below a first threshold; and increase or decrease the effective cross-sectional area of the flow path 52 when the first or a second sensed property of fluid flowing in the flow path 52 is above or below the first or a second threshold.
  • any type of movement including deformation, deflection, axial, radial, rotational
  • any number of apertures 61 , or no apertures 61 , and any number of air inlets 28 may be used, in any combination.
  • the relative sizes of the inlets 28 and apertures 61 can be modified as required; they need not be the same as in the Figures.
  • the examples show the inlets 28 and apertures 61 have a diameter which is substantially constant. This is not essential; the inlets 28 and I or apertures 61 may be otherwise shaped to achieve particular effects of flow control.
  • the baffle 60 is schematically represented as a solid rectangular element.
  • the baffle 60 and any associated aperture(s) 61 or slit(s) 62 may be of any shape.
  • the baffle 60 may comprise a curved or square rib, an edge feature such as a chamfered or bevelled edge and/or protrusions/recesses to further modify fluid flow.
  • the baffle 60 comprises one or more apertures 61 and/or the subsystem comprises one or more fluid (air) inlets 28, and different degrees of alignment between the apertures 61 in the baffle 60 and the one or more inlets 28 provide different degrees of overlap between the one or more inlets 28 and the one or more apertures 61 . It may be desired that complete blockage of the airflow path is unachievable, at least in use, such as for safety reasons, so the system may be configured to ensure that the air inlet flow path is always at least partly open when the device is on, e.g. by using a biasing element 63 such as in Figure 3e, or e.g.
  • the baffle 60 is configured to move to substantially cover the air inlet 28 to prevent airflow therethrough.
  • the system may be configured to move the baffle to substantially cover the air inlet 28 e.g. when the user switches off the device, the aerosolgenerating material is substantially depleted and/or the power source is substantially depleted.
  • the baffle 60 is interchangeable and/or replaceable by the user, for example to allow switching between different baffles 60 having different features such as materials with different properties (e.g. stiffness, porosity), geometries (e.g. length, width, edge features, aperture size, aperture number, aperture shape or aperture arrangement) etc. to alter the user experience.
  • materials with different properties e.g. stiffness, porosity
  • geometries e.g. length, width, edge features, aperture size, aperture number, aperture shape or aperture arrangement
  • flow path diameter / cross-sectional area adjustments may be configured to be practically instantaneous, or configured to be steadily increasing/decreasing over a short period of time, such as the time for a user to take a partial puff, a single puff or a few puffs (e.g. 0.1 -0.5 seconds, 0.1-1 second, 0.5-3 seconds, 0.5-5 seconds, 1-3 seconds, 1-30 seconds).
  • the baffle 60 may be configured to provide periodic (e.g. every 0.5s, 1s, 2s, effectively for each puff) or continuous temporal adjustment, e.g. dependent on sensed parameters (fluid properties), and I or may provide continuously variable position adjustment or position adjustment between two or more predetermined positions only.
  • Various embodiments of the invention may suitably comprise, consist of, or consist essentially of, appropriate combinations of the disclosed elements, components, features, parts, steps, means, etc., other than those specifically described herein.
  • this disclosure may include other inventions not presently claimed, but which may be claimed in future.

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Abstract

L'invention concerne un sous-système de distribution d'aérosol pour un système de distribution d'aérosol, comprenant une entrée ; une sortie ; et un déflecteur conçu pour se déplacer et ainsi modifier l'écoulement de fluide le long d'un trajet d'écoulement entre l'entrée et la sortie lors de l'utilisation, en réponse au fait que le fluide est aspiré le long du trajet d'écoulement.
PCT/GB2023/052689 2022-10-18 2023-10-17 Systèmes et procédés de distribution d'aérosol WO2024084198A1 (fr)

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GB2215358.9 2022-10-18
GBGB2215358.9A GB202215358D0 (en) 2022-10-18 2022-10-18 Aerosol delivery systems and methods

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WO2024084198A1 true WO2024084198A1 (fr) 2024-04-25

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Citations (6)

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WO2016012774A1 (fr) 2014-07-22 2016-01-28 Nicoventures Holdings Limited Système de fourniture de vapeur électronique
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