EP3711605A1 - Système d'administration d'aérosol - Google Patents

Système d'administration d'aérosol Download PDF

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Publication number
EP3711605A1
EP3711605A1 EP19164458.2A EP19164458A EP3711605A1 EP 3711605 A1 EP3711605 A1 EP 3711605A1 EP 19164458 A EP19164458 A EP 19164458A EP 3711605 A1 EP3711605 A1 EP 3711605A1
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EP
European Patent Office
Prior art keywords
aerosol
region
heater
fluid
transfer article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP19164458.2A
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German (de)
English (en)
Inventor
designation of the inventor has not yet been filed The
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nerudia Ltd
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Nerudia Ltd
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 Nerudia Ltd filed Critical Nerudia Ltd
Priority to EP19164458.2A priority Critical patent/EP3711605A1/fr
Priority to EP23177585.9A priority patent/EP4233588A3/fr
Priority to PCT/EP2020/057320 priority patent/WO2020187923A1/fr
Priority to EP20715754.6A priority patent/EP3941281B8/fr
Publication of EP3711605A1 publication Critical patent/EP3711605A1/fr
Priority to US17/478,574 priority patent/US20220030942A1/en
Ceased legal-status Critical Current

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    • 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
    • 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 an aerosol delivery system, and an aerosol-generation apparatus for an aerosol delivery system.
  • the present invention preferably relates to an aerosol delivery system including a heater configured to heat an aerosol precursor to generate an aerosolised composition for inhalation by a user, and to an aerosol-generation apparatus therefor.
  • Pharmaceutical medicament physiologically active substances and flavourings for example may be delivered to the human body by inhalation through the mouth and/or nose.
  • Such material or substances may be delivered directly to the mucosa or mucous membrane lining the nasal and oral passages and/or the pulmonary system.
  • nicotine is consumed for therapeutic or recreational purposes and may be delivered to the body in a number of ways. Nicotine replacement therapies are aimed at people who wish to stop smoking and overcome their dependence on nicotine. Nicotine is delivered to the body in the form of aerosol delivery devices and systems, also known as smoking-substitute devices or nicotine delivery devices. Such devices may be non-powered or powered.
  • Devices or systems that are non-powered may comprise nicotine replacement therapy devices such as "inhalators”, e.g. Nicorette® Inhalator. These generally have the appearance of a plastic cigarette and are used by people who crave the behaviour associated with consumption of combustible tobacco - the so-called hand-to-mouth aspect - of smoking tobacco.
  • Inhalators generally allow nicotine-containing aerosol to be inhaled through an elongate tube in which a container containing a nicotine carrier, for example, a substrate, is located. An air stream caused by suction through the tube by the user carries nicotine vapours into the lungs of the user to satisfy a nicotine craving.
  • the container may comprise a replaceable cartridge, which includes a cartridge housing and a passageway in the housing in which a nicotine reservoir is located.
  • the reservoir holds a measured amount of nicotine in the form of the nicotine carrier.
  • the measured amount of nicotine is an amount suitable for delivering a specific number of "doses".
  • the form of the nicotine carrier is such as to allow nicotine vapour to be released into a fluid stream passing around or through the reservoir. This process is known as aerosolization and or atomization. Aerosolization is the process or act of converting a physical substance into the form of particles small and light enough to be carried on the air i.e. into an aerosol.
  • Atomization is the process or act of separating or reducing a physical substance into fine particles and may include the generation of aerosols.
  • the passageway generally has an opening at each end for communication with the exterior of the housing and for allowing the fluid stream through the passageway.
  • a nicotine-impermeable barrier seals the reservoir from atmosphere.
  • the barrier includes passageway barrier portions for sealing the passageway on both sides of the reservoir. These barrier portions are frangible so as to be penetrable for opening the passageway to atmosphere.
  • a device or a system that is powered can fall into two sub-categories.
  • such devices or systems may comprise electronic devices or systems that permit a user to simulate the act of smoking by producing an aerosol mist or vapour that is drawn into the lungs through the mouth and then exhaled.
  • the electronic devices or systems typically cause the vaporization of a liquid containing nicotine and entrainment of the vapour into an airstream. Vaporization of an element or compound is a phase transition from the liquid phase to vapour i.e. evaporation or boiling.
  • the user experiences a similar satisfaction and physical sensation to those experienced from a traditional smoking or tobacco product, and exhales an aerosol mist or vapour of similar appearance to the smoke exhaled when using such traditional smoking or tobacco products.
  • devices or systems of the second, powered category include, but are not limited to, electronic nicotine delivery systems, electronic cigarettes, e-cigarettes, e-cigs, vaping cigarettes, pipes, cigars, cigarillos, vaporizers and devices of a similar nature that function to produce an aerosol mist or vapour that is inhaled by a user.
  • Such nicotine delivery devices or systems of the second category incorporate a liquid reservoir element generally including a vaporizer or misting element such as a heating element or other suitable element, and are known, inter alia, as atomizers, cartomizers, or clearomizers.
  • Some electronic cigarettes are disposable; others are reusable, with replaceable and refillable parts.
  • Aerosol delivery devices or systems in a first sub-category of the second, powered category generally use heat and/or ultrasonic agitation to vaporize a solution comprising nicotine and/or other flavouring, propylene glycol and/or glycerine-based base into an aerosol mist of vapour for inhalation.
  • Aerosol delivery devices or systems in a second sub-category of the second, powered category may typically comprise devices or systems in which tobacco is heated rather than combusted.
  • volatile compounds may be released from the tobacco by heat transfer from the heat source and entrained in air drawn through the aerosol delivery device or system.
  • Direct contact between a heat source of the aerosol delivery device or system and the tobacco heats the tobacco to form an aerosol.
  • the aerosol containing the released compounds passes through the device, it cools and condenses to form an aerosol for inhalation by the user.
  • heating, as opposed to burning the tobacco may reduce the odour that can arise through combustion and pyrolytic degradation of tobacco.
  • Aerosol delivery devices or systems falling into the first sub-category of powered devices or systems may typically comprise a powered unit, comprising a heater element, which is arranged to heat a portion of a carrier that holds an aerosol precursor.
  • the carrier comprises a substrate formed of a "wicking" material, which can absorb aerosol precursor liquid from a reservoir and hold the aerosol precursor liquid.
  • aerosol precursor liquid in the portion of the carrier in the vicinity of the heater element is vaporised and released from the carrier into an airstream flowing around the heater and carrier. Released aerosol precursor is entrained into the airstream to be borne by the airstream to an outlet of the device or system, from where it can be inhaled by a user.
  • the heater element is typically a resistive coil heater, which is wrapped around a portion of the carrier and is usually located in the liquid reservoir of the device or system. Consequently, the surface of the heater may always be in contact with the aerosol precursor liquid, and long-term exposure may result in the degradation of either or both of the liquid and heater. Furthermore, residues may build up upon the surface of the heater element, which may result in undesirable toxicants being inhaled by the user. Furthermore, as the level of liquid in the reservoir diminishes through use, regions of the heater element may become exposed and overheat.
  • the present invention has been devised in light of the above considerations.
  • an aerosol generation apparatus has a fluid-transfer article with a first region which holds an aerosol precursor, the first region being arranged to transfer the aerosol precursor to a second region of the fluid-transfer article. That second region has two parts of different materials, one part being adjacent to the first region and the second part being of a material resistant to higher temperatures than the material of the first part.
  • the first part has a plurality of holes therein and the second part extends across those holes so that aerosol precursor in the holes will pass to the second part of the second region.
  • the second part is porous for passage therethrough of the aerosol precursor from the holes to an activation surface.
  • the second part of the second region has one or more recesses therein opening towards the heater and forming one or more gaps between the activation surface and the heater.
  • the one or more gaps then form at least one air-flow pathway along the activation surface.
  • the gaps may thus form channels in the second part of the second region at the activation surface, along which air may flow.
  • the aerosol-generation apparatus also has a heater, which heater preferably contacts a part of the activation surface so as to interact thermally therewith.
  • the heater is not bonded to the activation surface, instead it may make abutting unbonded contact so that the heater and the activation surface are separable. Alternatively, the heater may be spaced from the activation surface.
  • the separability of the fluid-transfer article and the heater means that it is possible to replace the fluid-transfer article without having to replace the heater. Since the aerosol precursor will be consumed when the apparatus is used by a user, it will normally be necessary to replace or at least refill the fluid-transfer article periodically, as it acts as a reservoir for the aerosol precursor.
  • the two different materials of the second region of the fluid-transfer article allow one (the material of the second part) to be adapted to the heater, whilst the other (the material of the first part) may be a lower cost material.
  • the first part of the second region has a plurality of holes therein.
  • those holes do not act as capillaries, but instead may be of a size or sizes so that they cooperate with the second part of the second region to define non-capillary spaces in the second region in to which the aerosol precursor is able to flow.
  • the aerosol precursor may pass from the first region in a non-capillary manner into the holes, and impinge on the second part of the second region. It may then pass through the second part due to the porous nature of the second part.
  • the second region of the fluid-transfer article may thus act as a wick, to cause aerosol precursor to move from the first region to the activation surface where it may be heated by the heater.
  • the wick may have a two-layer structure, formed by the two parts of the second region. One of those parts is preferably being made of an inexpensive material through which the holes pass, and the second part is of a more heat resistant material, which will interact with the heater at the activation surface. Aerosol precursor will be drawn through the second region, partly because the holes will fill with aerosol precursor, and partly because of the porous nature of the second part of the second region.
  • an aerosol-generation apparatus comprising a heater, and a fluid-transfer article, said fluid-transfer article comprising a first region for holding an aerosol precursor and for transferring said aerosol precursor to a second region of said fluid-transfer article, said second region comprising a first part of a first material, said first part being adjacent said first region and having a plurality of holes therein, and a second part of a second material different from the first material and being resistant to higher temperatures than said first material, said second part being adjacent to said first part and extending across said plurality of holes in said first part; wherein said second part of said second region is porous for passage therethrough of said aerosol precursor from said plurality of holes to an activation surface of said second region; said activation surface being disposed to as to interact thermally with said heater, and wherein said second part of said second region has at least one recess therein opening towards said heater, said at least one recess forming at least one gap between said activation surface and said heater,
  • said heater is mounted so as to be in contact with at least one part of said activation surface. Then, it is preferable that said heater and said activation surface are separable.
  • said plurality of holes are sized to that they cooperate with said second part of said second region to define non-capillary spaces in said second region into which said aerosol precursor is able to flow from said first region in a non-capillary manner, thereby to impinge on said second part of said second region.
  • the heater is preferably a coil, mesh or foil.
  • said first part of said second region is formed of a solid polymer material having said plurality of holes therein.
  • said second part of said second region is formed of fibrous material.
  • That fibrous material may be ceramic fibre, glass fibre or carbon fibre.
  • the second part of the second region may be porous glass or porous ceramic.
  • the second part of the second region is of a porous polymer material.
  • the first region of the fluid-transfer article to be a simple reservoir filled with liquid aerosol precursor, from which reservoir the liquid flows into the holes in the first part of the second region of the fluid-transfer article.
  • the plurality of holes are moulded holes.
  • the first part of the second region is formed of solid polymer material and it is then convenient to mould the holes at the same time that the first part itself is moulded.
  • the fluid-transfer article may act as a reservoir for aerosol precursor.
  • One option is for the first region of said fluid-transfer article to be of porous polymer material.
  • the porous polymer material of the first region may comprise Polyetherimide (PEI) and/or Polyether ether ketone (PEEK) and/or Polytetrafluoroethylene (PTFE) and/or Polyimide (PI) and/or Polyethersulphone (PES) and/or Ultra-High Molecular Weight Polyethylene (UHMWPE) and/or Polypropylene (PP) and/or Polyethylene Terephthalate (PET). Similar materials may be used for the second part of the second region when that second region is made of a porous polymer material, as mentioned above.
  • PEI Polyetherimide
  • PEEK Polyether ether ketone
  • PTFE Polytetrafluoroethylene
  • PI Polyimide
  • PES Polyethersulphone
  • UHMWPE Ultra-High Molecular Weight Polyethylene
  • PP Polypropylene
  • PET Polyethylene Terephthalate
  • the first region of the fluid-transfer article may be a simple hollow reservoir which is filled with aerosol precursor when the apparatus is to be used.
  • the aerosol-generation apparatus may form part of an aerosol delivery system which has a carrier which includes a housing containing the fluid-transfer article.
  • the aerosol delivery system may then include a further housing supporting the heater.
  • the housing and the further housing may be mutually separable, to allow the carrier, and hence the fluid-transfer article, to be removed from the rest of the aerosol delivery system.
  • the further housing may have an inlet with the air-flow pathway extending to the inlet.
  • the invention includes the combination of the aspects and preferred features described except where such a combination is clearly impermissible or expressly avoided.
  • one or more embodiments in accordance with the present invention may provide a system for aerosol delivery in which an aerosol carrier may be inserted into a receptacle (e.g. a "heating chamber") of an apparatus for initiating and maintaining release of an aerosol from the aerosol carrier.
  • a receptacle e.g. a "heating chamber”
  • Another end, or another end portion, of the aerosol carrier may protrude from the apparatus and can be inserted into the mouth of a user for the inhalation of aerosol released from the aerosol carrier cartridge during operation of the apparatus.
  • system for aerosol delivery shall be referred to as "aerosol delivery system”.
  • FIG. 1 there is illustrated a perspective view of an aerosol delivery system 10 comprising an aerosol generation apparatus 12 operative to initiate and maintain release of aerosol from a fluid-transfer article in an aerosol carrier 14.
  • the aerosol carrier 14 is shown with a first end 16 thereof and a portion of the length of the aerosol carrier 14 located within a receptacle of the apparatus 12. A remaining portion of the aerosol carrier 14 extends out of the receptacle. This remaining portion of the aerosol carrier 14, terminating at a second end 18 of the aerosol carrier, is configured for insertion into a user's mouth.
  • a vapour and/or aerosol is produced when a heater (not shown in Figure 1 ) of the apparatus 12 heats a fluid-transfer article in the aerosol carrier 14 to release a vapour and/or an aerosol, and this can be delivered to the user, when the user sucks or inhales, via a fluid passage in communication with an outlet of the aerosol carrier 14 from the fluid-transfer article to the second end 18.
  • the device 12 also comprises air-intake apertures 20 in the housing of the apparatus 12 to provide a passage for air to be drawn into the interior of the apparatus 12 (when the user sucks or inhales) for delivery to the first end 16 of the aerosol carrier 14, so that the air can be drawn across an activation surface of a fluid-transfer article located within a housing of the aerosol carrier cartridge 14 during use.
  • these apertures may be perforations in the housing of the apparatus 12.
  • a fluid-transfer article 34 (not shown in Figure 1 , but described hereinafter with reference to Figs. 5 to 7 is located within a housing of the aerosol carrier 14.
  • the fluid-transfer article 34 contains an aerosol precursor material, which may include at least one of: nicotine; a nicotine precursor material; a nicotine compound; and one or more flavourings.
  • the fluid-transfer article 34 is located within the housing of the aerosol carrier 14 to allow air drawn into the aerosol carrier 14 at, or proximal, the first end 16, and has first and second regions, as will be described.
  • the first region of the fluid-transfer article 34 may comprise a substrate of porous material where pores of the porous material hold, contain, carry, or bear the aerosol precursor material.
  • the porous material of the fluid-transfer article may be a porous polymer material such as, for example, a sintered material.
  • material suitable for the fluid-transfer article include: Polyetherimide (PEI); Polytetrafluoroethylene (PTFE); Polyether ether ketone (PEEK); Polyimide (PI); Polyethersulphone (PES); and Ultra-High Molecular Weight Polyethylene.
  • Other suitable materials may comprise, for example, BioVyonTM (by Porvair Filtration Group Ltd) and materials available from Porex®.
  • a substrate forming the fluid-transfer article may comprise Polypropylene (PP) or Polyethylene Terephthalate (PET). All such materials may be described as heat resistant polymeric wicking material in the context of the present invention.
  • the first region of the fluid-transfer article 34 may take the form of a simple tank having a cavity defining a hollow reservoir to hold the aerosol precursor.
  • the aerosol carrier 14 is removable from the apparatus 12 so that it may be disposed of when expired. After removal of a used aerosol carrier 14, a replacement aerosol carrier 14 can be inserted into the apparatus 12 to replace the used aerosol carrier 14.
  • Figure 2 is a cross-sectional side view illustration of a part of apparatus 12 of the aerosol delivery system 10.
  • the apparatus 12 comprises a receptacle 22 in which is located a portion of the aerosol carrier 14. In one or more optional arrangements, the receptacle 22 may enclose the aerosol carrier 14.
  • the apparatus 12 also comprises a heater 24, which interacts thermally with an activation surface of the fluid-transfer article 34 when an aerosol carrier 14 is located within the receptacle 22.
  • an aerosol is released, or liberated, from the fluid-transfer article, and is drawn from the material of the aerosol carrier unit by the air flowing across the activation surface and is transported in the air flow to via outlet conduits (not shown in Figure 2 ) in the housing of the aerosol carrier 14 to the second end 18.
  • outlet conduits not shown in Figure 2
  • the direction of air flow is illustrated by arrows in Figure 2 .
  • the activation surface of the fluid-transfer article 34 is heated by the heater 24.
  • the aerosol released from the fluid-transfer article and entrained in the air flowing across the activation surface is drawn through the outlet conduits (not shown) in the housing of the aerosol carrier 14 towards the second end 18 and onwards into the user's mouth.
  • apparatus 12 comprises a housing 26, in which is located the receptacle 22.
  • the housing 26 also contains control circuitry (not shown) operative by a user, or upon detection of air and/or vapour being drawn into the device 12 through air-intake apertures 20, i.e. when the user sucks or inhales.
  • the housing 26 comprises an electrical energy supply 28, for example a battery.
  • the battery comprises a rechargeable lithium ion battery.
  • the housing 26 also comprises a coupling 30 for electrically (and optionally mechanically) coupling the electrical energy supply 28 to control circuitry (not shown) for powering and controlling operation of the heater 24.
  • the heater 24 heats the activation surface of the fluid-transfer article 34 (not shown in Figure 3 ).
  • This heating process initiates (and, through continued operation, maintains) release of vapour and/or an aerosol from the activation surface of the fluid-transfer article 34.
  • the vapour and/or aerosol formed as a result of the heating process is entrained into a stream of air being drawn across the activation surface of the fluid-transfer article 34 (as the user sucks or inhales).
  • the stream of air with the entrained vapour and/or aerosol passes through the aerosol carrier 14 via outlet conduits (not shown) and exits the aerosol carrier 14 at second end 18 for delivery to the user.
  • Figures 4 and 5 schematically illustrate the aerosol carrier 14 in more detail (and, in Figure 5 , features within the receptacle in more detail).
  • Figure 4 illustrates an exterior of the aerosol carrier 14
  • Figure 5 illustrates internal components of the aerosol carrier 14 in one optional configuration.
  • Fig. 4 illustrates the exterior of the aerosol carrier 14, which comprises housing 32 for housing said fluid-transfer article (not shown).
  • the particular housing 32 illustrated in Figure 4 comprises a tubular member, which may be generally cylindrical in form, and which is configured to be received within the receptacle of the apparatus.
  • First end 16 of the aerosol carrier 14 is for location to oppose the heater of the apparatus, and second end 18 (and the region adjacent the second end 18) is configured for insertion into a user's mouth.
  • FIG. 5 illustrates some internal components of the aerosol carrier 14 and of the heater 24 of apparatus 12, in one embodiment of the invention.
  • the aerosol carrier 14 comprises a fluid-transfer element 34. At least part of the fluid-transfer article 34 may be removable from the housing 32, to enable it to be replaced.
  • the fluid-transfer article 34 acts as a reservoir for aerosol precursor and that aerosol precursor will be consumed as the apparatus is used. Once sufficient aerosol precursor has been consumed, the aerosol precursor will need to be replaced. It may then be easiest to replace it by replacing the fluid-transfer article 34, rather than trying to re-fill the fluid-transfer article 34 with aerosol precursor while it is in the housing 32.
  • the aerosol precursor will pass to the surface of the plate 36b remote from the first region 35 of the fluid-transfer article 34, which surface acts as an activation surface 41 of the fluid-transfer article 34.
  • a heater is mounted so as to contact the activation surface 41. When the heater 24 is activated, the heat which it generates will be transferred to the activation surface 41.
  • FIG. 5 Further components not shown in Figure 5 comprise: an inlet conduit, via which air can be drawn into the aerosol carrier 14; an outlet conduit, via which an air stream entrained with aerosol can be drawn from the aerosol carrier 14; a filter element; and a reservoir for storing aerosol precursor material and for providing the aerosol precursor material to the fluid-transfer article 34.
  • the aerosol carrier is shown as comprising the fluid-transfer article 34 located within housing 32.
  • the fluid transfer article 34 comprises a first region 35 holding an aerosol precursor.
  • the first region of 35 of the fluid transfer article 34 comprises a reservoir for holding the aerosol precursor.
  • the first region 35 can be the sole reservoir of the aerosol carrier 14, or it can be arranged in fluid communication with a separate reservoir, where aerosol precursor is stored for supply to the first region 35.
  • the first region 35 has a first layer 35a and a second layer 35b.
  • the material forming the first layer 35a of the first region 35 comprises a porous structure, whose pore diameter size varies between one end of the first layer 35a and another end of the first layer 35a.
  • the pore diameter size may increase from a first end remote from heater 24 (the upper end is as shown in the figure) to a second end.
  • the pore diameter size may change in a step-wise manner (i.e. a first part with pores having a diameter of first size, and a second part with pores having a diameter of second, smaller size), or the change in pore size in the first layer 35a may be gradual rather than step-wise.
  • This configuration of pores having a decreasing diameter size can provide a wicking effect, which can serve to draw fluid through the first layer 35a, towards heater 24.
  • the first region 35 of the fluid transfer article 34 may also comprise a second layer 35b. Aerosol precursor is drawn from the first layer 35a to the second layer 35b by the wicking effect of the material forming the first layer 35a. Thus, the first layer 35a is configured to transfer the aerosol precursor to the second layer 35b of the first region 35 of the fluid-transfer article 34.
  • the second layer 35b itself may comprise a porous structure formed by a porous polymer material. It is then preferable that the pore diameter size of the porous structure of the second layer 35b is smaller than the pore diameter size of the immediately adjacent part of the first layer 35a.
  • the porous polymer material may be a sintered material.
  • material suitable for the fluid-transfer article include: Polyetherimide (PEI); Polytetrafluoroethylene (PTFE); Polyether ether ketone (PEEK); Polyimide (PI); Polyethersulphone (PES); and Ultra-High Molecular Weight Polyethylene.
  • Other suitable materials may comprise, for example, BioVyonTM (by Porvair Filtration Group Ltd) and materials available from Porex®.
  • a substrate forming the fluid-transfer article may comprise Polypropylene (PP) or Polyethylene Terephthalate (PET).
  • the first region 35 of the fluid-transfer article need not be of porous polymer material as described above.
  • the first region 35 of the fluid-transfer article 34 may take the form of a simple tank having a cavity defining a hollow reservoir to hold the aerosol precursor.
  • the plate 36a with holes 37 therein will extend across the bottom of the tank so that aerosol precursor held in the tank will impinge directly on the plate 36a and pass directly from the tank defining the first region 35 of the fluid-transfer article 34 into the holes 37 of the second region 36 of the fluid-transfer article.
  • the second plate 36b of second region 36 has a plurality of recesses 38 therein so that the activation surface 41 is convoluted, with parts in contact with the heater 24, and parts at the recesses 38 are spaced from the heater 24 to form the air-flow pathways along the activation surface 41, through which air can pass as it flows from the apertures 20 to the second end 18.
  • the recesses 38 form channels for the air-flow pathways.
  • the recesses are rectangular in cross-section. Other shapes are also possible, such as square, V-shaped, or curved or arched.
  • the heater 24 transfers heat to the activation surface 41 thereby releasing aerosol precursor which has reached that activation surface 41 through the porous polymer material (or hollow reservoir) of the first region 35, and through the second region 36. That vapour and/or a mixture of vapour and aerosol, may then pass into the air adjacent the activation surface 41 and the heater 24. In particular, the vapour or mixture will pass into the spaces (channels) formed by the recesses 38, from the walls of those recesses.
  • the sizes of the recesses 38, and the sizes of the parts of the activation surface 41 in contact with the heater 24 are chosen so as to balance the need for the heater 24 to heat the second part 36b of the intermediate structure 36 to release vapour from the activation surface 41, and the need for the recesses 38 to be large enough to permit an adequate flow of air along the air-flow pathways.
  • an air-flow pathway for air (hereinafter referred to as an air-flow pathway) along each of the channels formed by the recesses 38, linking the apertures 20 and the second end 18 of the aerosol carrier.
  • One or more droplets of the aerosol precursor will be released from the second plate 36b and heated, to release vapour or a mixture of aerosol and vapour into the air flowing in the air-flow pathway or pathways.
  • the vapour or mixture passes, as the user sucks and inhales, to the second end 18.
  • the second region 36 of the fluid-transfer article 34 comprises a first plate 36a and a second plate 36b.
  • the first plate 36a may be a moulded polymer disc so that is then easy to form the holes 37 therein by moulding the holes 37 when the plate 36a is itself moulded.
  • the holes 37 are sufficiently large that they do not act as a capillaries, but instead define non-capillary spaces in the second region 36.
  • aerosol precursor is able to pass from the first region 35 of the fluid-transfer article to the second region 36 in a non-capillary manner, into the holes 37, and then pass through the second plate 36b to the heater or heaters 24.
  • the holes 37 may be relatively large, so that they fill with aerosol precursor when the apparatus is in use.
  • the second plate 36b is made of a porous material which is more heat-resistant than the material of the plate 36a, as it is acted on directly by the heater 24. It may be fibrous, made from e.g. ceramic fibre, glass fibre or carbon fibre. Alternatively, it may be formed from a high-temperature porous material such as porous glass or porous ceramic. Another possibility is that the second plate 36b may be of a porous polymer material, such as the materials described previously with reference to the layers 35a and 35b of the first region 35, provided that the polymer material is sufficiently resistant to the high temperatures to which it will be subject due to the heater or heaters 24.
  • the fluid-transfer article 34 forms the consumable part of the apparatus, in the sense that it can readily be replaced to enable the aerosol precursor to be replaced once it is consumed.
  • the heater 24 is not part of the consumable elements.
  • the housing 32 containing the fluid-transfer article 34 may be separable from a housing 43 supporting the heater 24 along the line B-B in Figure 5 .
  • the further housing 43 may be integral with the housing 26 containing the electrical energy supply 28. It is for this reason that the heater 24 makes contact with, but is not bonded to, the activation surface 41.
  • the contact ensures the most efficient heat transfer from the heater 24 to the second plate 36b to heat the activation surface 41 but the heater 24 must be separable from that activation surface 41 to allow removal of the housing 32 from the further housing 43 when the fluid-transfer article 34 has become depleted.
  • the line B to B may therefore correspond to the part of the activation surface 41 which contacts the heater 24.
  • the heater 24 may be a coil, mesh or foil heater such as a radial or Clapton coil. Such a coil, mesh or foil heater is preferred so that any restriction caused by the heater 24 on release of aerosol or vapour from the activation surface 41 is minimised.
  • the first layer 35a of the first region 35 of the fluid-transfer article 34 is located at an "upstream” end of the fluid-transfer article 34 and the second plate 35b of the second region 35b is located at a downstream" end of the fluid-transfer article 34. That is, aerosol precursor is wicked, or is drawn, from the "upstream” end of the fluid-transfer article 34 to the "downstream" end of the fluid-transfer article 34 (as denoted by arrow A in Figure 5 ).
  • the heater 24 contacts the parts of the second plate 36b between the recesses 38. It thus makes direct (though unbonded) contact with parts of the activation surface 41. This ensures good heat transfer from the heater 24 to the second plate 36b, hence heating the activation surface 41, both where the activation surface 41 contacts the heater 24 and at the recesses 38. It would be possible for the heater 24 to be spaced from the second plate 36b, but this is not preferred, both because the first transfer would be less efficient, and also because there would then be some air flow between the heater 24 and the activation surface 41 not through the channels formed by the recesses 38.
  • Figures 6 and 7 show an alternative configuration, in which the fluid-transfer article is annular, and both the first region 35 and the second region 36 are then in the form of annuli.
  • the structure of the fluid-transfer article 34, including the first region 35 and the second region 36 may correspond generally to that shown in Figure 5 .
  • the internal structure of the first and second regions 35 and 36 may be the same as in Figure 5 , but are not illustrated in detail in Figures 6 and 7 for simplicity. However, the air flow in the apparatus is discussed in more detail below.
  • Figures 6 and 7 illustrate an aerosol carrier 14 according to one or more possible arrangements in more detail.
  • Figure 6 is a cross-section side view illustration of the aerosol carrier 14
  • Figure 7 is a perspective cross-section side view illustration of the aerosol carrier 14.
  • the aerosol carrier 14 is generally tubular in form.
  • the aerosol carrier 14 comprises housing 32, which defines the external walls of the aerosol carrier 14 and which defines therein a chamber in which are disposed the fluid-transfer article 34 (adjacent the first end 16 of the aerosol carrier 14) and internal walls defining the fluid communication pathway 48.
  • Fluid communication pathway 48 defines a fluid pathway for an outgoing air stream from the channels 40 to the second end 18 of the aerosol carrier 14.
  • the fluid-transfer article 34 is an annular shaped element located around the fluid communication pathway 48.
  • the housing 32 containing the fluid-transfer article 34 is separable from the housing 43 supporting the heater 24.
  • inlet apertures 50 In walls of the housing 43, there are provided inlet apertures 50 to provide a fluid communication pathway for an incoming air stream to reach the activation surface 41 of the second region 36 of the fluid-transfer article 34.
  • the aerosol carrier 14 further comprises a filter element 52.
  • the filter element 52 is located across the fluid communication pathway 48 such that an outgoing air stream passing through the fluid communication pathway 48 passes through the filter element 52.
  • An incoming air stream 42a from a first side of the aerosol carrier 14 is directed to a first side of the second region 36 (e.g. via a gas communication pathway within the housing of the carrier).
  • An incoming air stream 42b from a second side of the aerosol carrier 14 is directed to a second side of the second region 36 (e.g. via a gas communication pathway within the housing of the carrier).
  • the heater 24 of the apparatus 12 raise a temperature of the second plate 36b of the second region 36 to a sufficient temperature to release, or liberate, captive substances (i.e. the aerosol precursor) to form a vapour and/or aerosol, which is drawn downstream.
  • the air streams 44a and 44b continue their passages, more released aerosol precursor is entrained within the air streams 44a and 44b.
  • the air streams 44a and 44b entrained with aerosol precursor meet at a mouth of the outlet fluid communication pathway 48, they enter the outlet fluid communication pathway 48 and continue until they pass through filter element 52 and exit outlet fluid communication pathway 48, either as a single outgoing air stream, or as separate outgoing air streams 46 (as shown).
  • the outgoing air streams 46 are directed to an outlet, from where it can be inhaled by the user directly (if the second end 18 of the aerosol capsule 14 is configured as a mouthpiece), or via a mouthpiece.
  • the outgoing air streams 46 entrained with aerosol precursor are directed to the outlet (e.g. via a gas communication pathway within the housing of the carrier).
  • Figure 8 is an exploded perspective view illustration of a kit-of-parts for assembling an aerosol delivery system 10.
  • the fluid-transfer article 34 is provided within a housing 32 of the aerosol carrier 14.
  • the housing of the carrier 14 serves to protect the aerosol precursor-containing fluid-transfer article 34, whilst also allowing the carrier 14 to be handled by a user without his/her fingers coming into contact with the aerosol precursor liquid retained therein.
  • the second plate 36b of the second region 36 may have a thickness of less than 5mm. In other embodiments it may have a thickness of: less than 3.5mm, less than 3mm, less than 2.5mm, less than 2mm, less than 1.9mm, less than 1.8mm, less than 1.7mm, less than 1.6mm, less than 1.5mm, less than 1.4mm, less than 1.3mm, less than 1.2mm, less than 1.1mm, less than 1mm, less than 0.9mm, less than 0.8mm, less than 0.7mm, less than 0.6mm, less than 0.5mm, less than 0.4mm, less than 0.3mm, less than 0.2mm, or less than 0.1mm.

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  • Medicinal Preparation (AREA)
  • Nozzles (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP19164458.2A 2019-03-21 2019-03-21 Système d'administration d'aérosol Ceased EP3711605A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19164458.2A EP3711605A1 (fr) 2019-03-21 2019-03-21 Système d'administration d'aérosol
EP23177585.9A EP4233588A3 (fr) 2019-03-21 2020-03-17 Système d'administration d'aérosol
PCT/EP2020/057320 WO2020187923A1 (fr) 2019-03-21 2020-03-17 Système de distribution d'aérosol
EP20715754.6A EP3941281B8 (fr) 2019-03-21 2020-03-17 Système d'administration d'aérosol
US17/478,574 US20220030942A1 (en) 2019-03-21 2021-09-17 Aerosol delivery system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19164458.2A EP3711605A1 (fr) 2019-03-21 2019-03-21 Système d'administration d'aérosol

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EP23177585.9A Pending EP4233588A3 (fr) 2019-03-21 2020-03-17 Système d'administration d'aérosol
EP20715754.6A Active EP3941281B8 (fr) 2019-03-21 2020-03-17 Système d'administration d'aérosol

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CN115104778A (zh) * 2021-03-19 2022-09-27 比亚迪股份有限公司 雾化器、雾化器的制作方法和电子烟

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104382238A (zh) * 2014-12-01 2015-03-04 深圳佳品健怡科技有限公司 电磁感应烟雾生成装置以及具有该装置的电子烟
US20150136156A1 (en) * 2012-11-22 2015-05-21 Qiuming Liu Electronic Cigarette and Electronic Cigarette Device
WO2018197515A1 (fr) * 2017-04-25 2018-11-01 Nerudia Ltd Système de libération d'aérosol

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150136156A1 (en) * 2012-11-22 2015-05-21 Qiuming Liu Electronic Cigarette and Electronic Cigarette Device
CN104382238A (zh) * 2014-12-01 2015-03-04 深圳佳品健怡科技有限公司 电磁感应烟雾生成装置以及具有该装置的电子烟
WO2018197515A1 (fr) * 2017-04-25 2018-11-01 Nerudia Ltd Système de libération d'aérosol

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WO2020187923A1 (fr) 2020-09-24
EP3941281A1 (fr) 2022-01-26
EP4233588A2 (fr) 2023-08-30
EP4233588A3 (fr) 2023-11-01
EP3941281B1 (fr) 2023-06-07
EP3941281B8 (fr) 2023-07-19

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