EP4225083A1 - Récipient de stockage de substance liquide pour un dispositif de génération d'aérosol - Google Patents

Récipient de stockage de substance liquide pour un dispositif de génération d'aérosol

Info

Publication number
EP4225083A1
EP4225083A1 EP21786868.6A EP21786868A EP4225083A1 EP 4225083 A1 EP4225083 A1 EP 4225083A1 EP 21786868 A EP21786868 A EP 21786868A EP 4225083 A1 EP4225083 A1 EP 4225083A1
Authority
EP
European Patent Office
Prior art keywords
porous body
liquid substance
storing container
internal cavity
closed internal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21786868.6A
Other languages
German (de)
English (en)
Inventor
Broderick COBURN
Joao Seco
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JT International SA
Original Assignee
JT International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JT International SA filed Critical JT International SA
Publication of EP4225083A1 publication Critical patent/EP4225083A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/42—Cartridges or containers for inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/10—Devices using liquid inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/44—Wicks
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/48—Fluid transfer means, e.g. pumps
    • A24F40/485—Valves; Apertures
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means

Definitions

  • a liquid substance storing container for an aerosol generating device for an aerosol generating device
  • the present invention relates to a liquid substance storing container for an aerosol generating device.
  • Aerosol generating devices also commonly called vaporizers or electronic cigarettes, allow vaporization of a substance to create an aerosol or mist that a user inhales.
  • An aerosol generating device comprises a heat source that heats the substance, generally a liquid often called e-liquid or e-juice, to create the aerosol in a vaporization zone of the aerosol generating device.
  • Channels are also provided for routing the aerosol from the vaporization zone to a mouth piece for the user.
  • the aerosol generating device often comprises a reservoir configured for storing the substance in liquid form, and feeders configured for moving the substance from the reservoir, such as by wicking or capillary action, to a vaporization zone for heating or vaporization.
  • This type of configuration needs to provide sealing means to seal a liquid outlet hole on the reservoir.
  • US 2018/0289909 discloses a vaporizer adapted to vaporize oil that is stored in one or several tabs.
  • the tab such as a tablet, cylinder, or disk, can include a porous body for storing liquid substance.
  • the tab can include a piece of porous ceramic
  • SUBSTITUTE SHEET (RULE 26) or sintered metal soaked, injected or infused with oil, such as to the point that the oil is held in place by capillary action.
  • the vaporizer can include a reservoir configured for holding one or more tabs and for supporting the tabs during heating.
  • Such a tab provides a medium for storing, transporting and allowing vaporization of a substance.
  • the quantity of oil or liquid substance stored in the tab is limited, and depends on the porosity of the tab.
  • the packing efficiency that is the ratio between the vaporizable substance volume stored in the storage medium and the volume occupied by the storage medium (or overall volume) is rather low, and limited by the volume of the vaporizable substance which can be stored in the pores of the porous body of the tab.
  • the present invention aims to improve the packing efficiency of a liquid substance storing container for an aerosol generating device.
  • the present invention thus relates to a liquid substance storing container for an aerosol generating device, comprising a porous body for storing liquid substance.
  • the porous body includes a closed internal cavity surrounded by wall of the porous body, said closed internal cavity further storing liquid substance by forming a closed pocket.
  • the volume of stored liquid substance in the storing container may be increased compared to a storing container made of the same porous body, without a closed internal cavity.
  • volume of stored liquid substance is not limited to the volume of the liquid substance which can be stored in the pores of the porous body of the tab, but also comprise the volume of the liquid substance stored in the closed internal cavity.
  • the packing efficiency is thus improved compared to a storing container made of a homogenous porous body with no internal cavity.
  • Such a liquid substance storing container allows a significant optimization of the volume of stored liquid substance, thanks to the closed internal cavity which provides the storing container with an internal reservoir of liquid substance.
  • the porous body is adapted to absorb a volume of liquid substance and to retain said volume of liquid substance until vaporized.
  • the liquid substance is then absorbed by capillary action in the porous body and goes through the porous body up to the closed internal cavity in order to be stored therein.
  • the volume of liquid substance is then retained both in the closed internal cavity and the walls of the porous body surrounding the closed internal cavity.
  • the porous body has an open-cell structure.
  • the open-cell structure of the porous body is adapted to retain the liquid substance in the closed internal cavity in a leak-proof manner when said porous body is maintained below a threshold temperature of 50°C.
  • the storing container is well adapted to store a liquid substance before its heating and vaporization.
  • the storing container may be manipulated by a user without risk of leakage, before using in an aerosol generating device.
  • the open-cell structure of the porous body is adapted to release the liquid substance from the closed internal cavity into the porous body by capillary action when said porous body is heated at or above said threshold temperature.
  • the open-cell structure of the porous body is adapted to release, through an outer surface of said porous body, a vaporized liquid substance when said porous body is heated at or above said threshold temperature.
  • the pore size of the open-cell structure of said porous body ranges between 0.5 to 100 micrometers.
  • the porous body is made of porous ceramic, sintered metal, sintered glass or alumina.
  • the porous body takes the shape of a disk, a cylinder, a hexagonal prism, or sphere.
  • the porous body takes the shape of a hollow cylinder or a hollow truncated cone.
  • the hollow form of the porous body may facilitate the handling of the storing container and/or the cooperation of the storing container with a heating unit in the aerosol generating device.
  • the closed internal cavity has a three-dimensional shape homothetic to the shape of said porous body.
  • the three-dimensional shape of the closed internal cavity is concentric with the shape of said porous body.
  • the closed internal cavity is thus centred in the porous body.
  • the liquid substance stored in the closed internal cavity can go homogeneously, through all the walls of the porous body surrounding the closed internal cavity.
  • the present invention relates to an aerosol generating device comprising a liquid substance storing container as recited above, and a heater adapted to heat the porous body at or above a threshold temperature of 50°C.
  • the aerosol generating device present the same advantages as the ones described in relation with the liquid substance storing container.
  • the heater is adapted to heat an outer surface of said porous body.
  • the porous body has a hollow shape and the heater is adapted to heat an inner surface of the hollow porous body.
  • Such a heating through an inner surface of the hollow porous body may improve the transfer of heat to the storing container, in order to speed up the temperature rise in the porous body, and thus the vaporization of the liquid substance.
  • FIG. 1A represents, in a schematic three dimensional view, a liquid substance storing container according to a first embodiment of the invention
  • Figure 1 B represents, in a schematic sectional view, the liquid substance storing container of Figure 1A;
  • FIG. 2 represents, in a schematic three dimensional view, a liquid substance storing container according to a second embodiment of the invention
  • FIG. 3 represents, in a schematic sectional view, a liquid substance storing container according to a third embodiment of the invention.
  • FIG. 4A represents, in a perspective view, a liquid substance storing container according to a fourth embodiment of the invention.
  • Figure 4B represents, in a schematic sectional view, the liquid substance storing container of Figure 4A;
  • FIG. 5 is a schematic view of an aerosol generating device according to one embodiment of the invention.
  • Figures 1A and 1 B depict a liquid substance storing container according to a first embodiment.
  • liquid substance storing container is a consumable item, configured to be used with an aerosol generating device, such as an electronic cigarette (e-cigarette).
  • an aerosol generating device such as an electronic cigarette (e-cigarette).
  • the liquid substance encompasses any types of vaporizable substances including oil, water, ... , which may be vaporized to form a mist capable of being inhaled by a user.
  • the liquid substance may be a e-liquid well known for using in the e-cigarettes. Extracts from the cannabis plant can also take the form of an oil or oil-like substance.
  • the liquid substance storing container 10 comprises a porous body 11 for storing the liquid substance.
  • the porous body 11 may be made of porous ceramic, sintered metal, sintered glass, alumina or silicon carbide.
  • the porous body 11 has an open-cell structure, with a matrix of pores adapted to absorb and then to retain, by capillary action, the liquid substance until vaporized.
  • the pore size of the open-cell structure of the porous body 11 ranges between 0.5 to 100 micrometers.
  • the pore size of the porous body may be equal to 15 micrometers, with the ability to retain 0,5 micrometers particle.
  • the porous body 11 may absorb a volume of liquid substance, for example by infusing: the porous body is immersed in a liquid bath and the liquid is sucked into the pores of the porous body 11 by capillary action.
  • the porous body 11 includes a closed internal cavity 12.
  • the closed internal cavity 12 is thus a recess or a chamber surrounded by the walls 11 a of the porous body 11 .
  • the closed internal cavity 12 thus forms a closed pocket or reservoir in the porous body itself, for storing liquid substance.
  • the liquid substance fills both the pores of the porous body 11 and the closed internal cavity 12.
  • the volume of the liquid substance stored in the liquid substance storing container 10 is increased, and is not limited to the volume of liquid substance retained in the pores of the porous body 11 .
  • the volume Vs of the liquid substance stored in the liquid substance storing container 10 is:
  • Vs (Ve - Vc) x e p + Vc wherein e p is the packing efficiency of the porous material of the porous body 11 .
  • the packing efficiency of a porous material is the ratio, inferior to 1 , between the liquid substance volume which can be stored in the pores of a storage medium made in the porous material and the volume occupied by the storage medium.
  • the volume of the stored liquid substance may be increased compared to the volume (Ve x e p ) which would be stored in a porous body 11 of the same shape, without a closed internal cavity.
  • the number of puffs per liquid substance storing container 10 is also increased when the liquid substance storing container 10 is used in a vaporizer.
  • the liquid substance may be loaded in the closed internal cavity 12 and the porous body 11 by infusing: the liquid substance storing container 10 can be heated, for example at 60° C about, and immersed in a liquid substance bath. The liquid substance is sucked into the pores of the porous body 11 by capillary action and also into the closed internal cavity 12, though the walls of the porous body 11 .
  • the porous body 11 takes the shape of a disk or a cylinder, with a height H and a cross-sectional surface S.
  • the volume Ve occupied by the porous body 11 or the volume envelope is:
  • the closed internal cavity 12 has a three-dimensional shape homothetic to the shape of the porous body 11 .
  • the closed internal cavity 12 takes also the shape of a disk or a cylinder, with a height H1 and a cross-sectional surface S1.
  • the volume Vc of the closed internal cavity 12 is:
  • Vc H1 x S1.
  • the packing efficiency of the liquid substance storing container 10 may be more or less increased.
  • the three-dimensional shape of the closed internal cavity 12 is concentric with the shape of the porous body 12.
  • the cylindrical shape of the closed internal cavity 12 has the same central longitudinal axis X as the one of the cylindrical shape of the porous body 11 , and the centres of the cylindrical shapes of the closed internal cavity 12 and the porous body 11 are merged.
  • the thickness of the walls 11 a of the porous body 11 surrounding the closed internal cavity 12 is thus identical in any directions around the closed internal cavity 12.
  • the thicknesses t of the top, bottom and side walls 11 a of the porous body 11 are the same.
  • the shapes of the porous body and the closed internal cavity are not limitative.
  • the closed internal cavity 12 may also be non-homothetic to the shape of the porous body 11 and/or be non-concentric with the shape of the porous body 11 .
  • the porous body 21 of the liquid substance storing container 20 may also take the shape of a hexagonal prism, the closed internal cavity 22 taking a same homothetic shape of a hexagonal prism or another shape.
  • the porous body 31 may also take the shape of a sphere or a ball, the closed internal cavity 32 taking also the shape of a sphere, for example concentrically disposed in the porous body 31.
  • the porous body 41 of a liquid substance storing container 40 takes the shape of a truncated cone, with a longitudinal axis Y.
  • the closed internal cavity 42 has also the shape of truncated cone, disposed along the same longitudinal axis Y as the one of the porous body 41.
  • the porous body 41 is hollow.
  • the hollow truncated cone has a hole 45 which extends along the longitudinal axis Y of the porous body 41 .
  • the hole 45 takes in this embodiment a frusto-conical shape, centrally disposed in the porous body 41.
  • this fourth embodiment with a hollow porous body 41 is not limitative.
  • the hollow porous body may take the shape of a hollow cylinder, with a cylindrical hole.
  • the closed internal cavity takes also the shape of a hollow cylinder.
  • the hole 45 of the porous body 41 is configured to fit with a heating element of an aerosol generating device.
  • the liquid substance storing container 10, 20, 30, 40 as described here above forms a solid consumable comprising a porous body 11 , 21 , 31 , 41 configured to retain the liquid substrate at an ambient temperature and to release and vaporize the liquid substrate when heated to form an aerosol.
  • the porous body 11 , 21 , 31 , 41 resists egress or leakage of liquid substrate through the pores of the porous material absent heating and vaporization of the liquid substrate.
  • the porous body 11, 21, 31, 41 also retain the liquid substance in the closed internal cavity 12, 22, 32, 42 in a leak-proof manner when the porous body is maintained below a threshold temperature, and is not heated.
  • the threshold temperature is set for instance to 50°C, so that the liquid substance storing container 10, 20, 30, 40 may be stored and transported without liquid leakage before use, by keeping the liquid substance storing container 10, 20,
  • the open-cell structure of the porous body 11, 21, 31, 41 is adapted to release, through its outer surface, a vaporized liquid substance.
  • the liquid substance heated in the pores of the porous body 11,21, 31, 41, and mainly in the pores of the walls 11a, 21a, 31a, 41a of the porous body 11 , 21 , 31 , 41 , is vaporized and released from the porous body 11,21,
  • liquid substance exudes through the porous walls 11a, 21a, 31 a, 41 a only when the porous body 11,21,31,41 is heated via an external heater, above the threshold temperature.
  • the liquid substance is gradually released from the closed internal cavity 12, 22, 32, 42 into the porous body 11, 21, 31, 41, by capillary action, when the liquid substance retained in the pores of the porous body 11,21,31,41 is vaporized.
  • the closed internal cavity 12, 22, 32, 42 ensures the replenishment of liquid substance in the pores of the porous body from the closed internal cavity 12, 22, 32, 42.
  • the closed internal cavity 12, 22, 32, 42 acts as a reservoir for fulfilling the pores of the porous material 11,21, 31,41.
  • the heating of the liquid substance in the pores of the porous body 11, 21, 31, 41 may be obtained in a continuous manner, with the gradual replenishment of the pores of the porous body 11,21,31,41.
  • the internal walls of the closed internal cavity 12 may be provided with ridges or grooves in order to increase the internal area of the closed internal cavity 12 in contact with the porous body 12. The transfer of the liquid substance from the closed internal cavity 12 into the porous body 11 is thus increased, ensuring a fast replenishment by capillary action of the pores of the porous body 12.
  • an aerosol generating device 50 which could be used for heating a liquid substance storing container 10, 20, 30, 40 is depicted in Figure 5 according to one embodiment of the invention.
  • the aerosol generating device 50 may comprise as usual a housing 51 with a mouth piece 52 at one end for inhalation of the vapour or a mist by a user.
  • the aerosol generating device 50 also comprise a heater 53 adapted to heat a liquid substance storing container 10, 20, 30, 40.
  • the heater is adapted to heat the porous body of the liquid substance storing container 10, 20, 30, 40 at or above the threshold temperature, here set at 50°C.
  • the liquid substance storing container 10, 20, 30, 40 is disposed in a vaporization chamber 54, and the heater 53 is adapted to heat an outer surface of the porous body of the liquid substance storing container 10, 20, 30, 40 for vaporizing the liquid substance retained in the pores of the porous body.
  • the heater 52 may be a direct heating source such as a laser, a LED (Light Emitting Diode), a flame or a heating resistance.
  • a direct heating source such as a laser, a LED (Light Emitting Diode), a flame or a heating resistance.
  • the heater 52 may also be an indirect source such as a flowing or stagnant air which has been heated.
  • the heater 53 is an electrical heating element and is powered by a battery 55.
  • the vaporized liquid substance is routed via flow channels (not illustrated) from the vaporization chamber 54 to the mouth piece 52, crossing preferably a filter 56 disposed upstream from a output 52a of the mouth piece 52.
  • flow channels not illustrated
  • this embodiment of the aerosol generating device is not limitative.
  • the heater may be adapted to heat an inner surface 45a of the hollow porous body 41 .
  • the heater may be configured to fit into the hole 45 of the porous body 41 .
  • the heater is in contact with the internal surface 45a of the hole 45 for heat conduction to the porous body 41.
  • the external surface of the heater matches the internal surface 45a of the hole 45 of the porous body 41 of the liquid substrate storing container 40.
  • an improved liquid substance storing container may be provided as a consumable for an electronic cigarette, with a higher liquid content rate compared to a consumable having the same overall volume and a homogeneous porous body, without internal cavity.
  • a higher volume of vaporizable liquid substance may be stored in the storing container thanks to the presence of the closed internal cavity.

Landscapes

  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Catching Or Destruction (AREA)

Abstract

Un récipient de stockage de substance liquide (10) pour un dispositif de génération d'aérosol comprend un corps poreux pour stocker une substance liquide. Le corps poreux (11) comprend une cavité interne fermée (12) stockant en outre une substance liquide. L'invention concerne également l'utilisation d'un dispositif de génération d'aérosol tel qu'une cigarette électronique.
EP21786868.6A 2020-10-05 2021-10-01 Récipient de stockage de substance liquide pour un dispositif de génération d'aérosol Pending EP4225083A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20200073 2020-10-05
PCT/EP2021/077160 WO2022073887A1 (fr) 2020-10-05 2021-10-01 Récipient de stockage de substance liquide pour un dispositif de génération d'aérosol

Publications (1)

Publication Number Publication Date
EP4225083A1 true EP4225083A1 (fr) 2023-08-16

Family

ID=72752333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21786868.6A Pending EP4225083A1 (fr) 2020-10-05 2021-10-01 Récipient de stockage de substance liquide pour un dispositif de génération d'aérosol

Country Status (4)

Country Link
US (1) US20230354893A1 (fr)
EP (1) EP4225083A1 (fr)
CA (1) CA3194791A1 (fr)
WO (1) WO2022073887A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2534210B (en) * 2015-01-19 2017-07-19 Ngip Res Ltd Aerosol-generating article
GB201511358D0 (en) * 2015-06-29 2015-08-12 Nicoventures Holdings Ltd Electronic aerosol provision systems
US20170055574A1 (en) * 2015-08-31 2017-03-02 British American Tobacco (Investments) Limited Cartridge for use with apparatus for heating smokable material
US11273428B2 (en) * 2017-04-10 2022-03-15 Iconic Ventures, Inc. Vaporizable substance storage device
US10413685B2 (en) 2017-04-10 2019-09-17 Iconic Ventures, Inc. Vaporizer
EP3711600A1 (fr) * 2019-03-21 2020-09-23 Nerudia Limited Article de transfert de fluide

Also Published As

Publication number Publication date
US20230354893A1 (en) 2023-11-09
CA3194791A1 (fr) 2022-04-14
WO2022073887A1 (fr) 2022-04-14

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