EP4226784A1 - Système de livraison d'aérosol comprenant un matériau hydrophobe, et cartouche associée et ensemble de génération d'aérosol - Google Patents

Système de livraison d'aérosol comprenant un matériau hydrophobe, et cartouche associée et ensemble de génération d'aérosol Download PDF

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Publication number
EP4226784A1
EP4226784A1 EP22156795.1A EP22156795A EP4226784A1 EP 4226784 A1 EP4226784 A1 EP 4226784A1 EP 22156795 A EP22156795 A EP 22156795A EP 4226784 A1 EP4226784 A1 EP 4226784A1
Authority
EP
European Patent Office
Prior art keywords
aerosol
delivering system
hydrophobic material
porous element
porous
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
EP22156795.1A
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German (de)
English (en)
Inventor
Stefan WIBIHAL
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
Priority to EP22156795.1A priority Critical patent/EP4226784A1/fr
Publication of EP4226784A1 publication Critical patent/EP4226784A1/fr
Pending legal-status Critical Current

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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
    • 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 concerns an aerosol delivering system comprising a hydrophobic material.
  • the present invention also concerns a cartridge and an aerosol generating assembly comprising such an aerosol delivering system.
  • reduced-risk or modified-risk devices also known as vaporisers or aerosol generating devices
  • vaporisers or aerosol generating devices have grown rapidly in the past few years as an aid to assist habitual smokers wishing to quit smoking traditional tobacco products such as cigarettes, cigars, cigarillos, and rolling tobacco.
  • aerosol generating devices comprise a reservoir for storing a vaporizable material, also known as aerosol forming precursor, which can comprise for example a liquid or a solid.
  • a heating system is formed of one or more electrically activated resistive elements arranged to heat said precursor to generate the aerosol.
  • the aerosol is released into an airflow path extending between an inlet and outlet of the device.
  • the outlet may be arranged in a mouthpiece, through which a user inhales for delivery of the aerosol.
  • the aerosol generating devices comprise generally a battery able to power the heating system.
  • the powering may be controlled by a control module connecting the heating system to the battery via an electric circuit.
  • the precursor is stored in a removable cartridge.
  • the cartridge can be easily removed and replaced.
  • a wicking system is generally used to deliver the vaporizable material to the heating system.
  • the wicking system may comprise a porous element in contact with both reservoir storing the vaporizable material and heating system.
  • the aerosol generating device is not used to generate aerosol, the wicking system can cause leakage of the vaporizable material.
  • One of the aims of the present invention is to propose an aerosol delivering system minimizing the risk of vaporizable material leakage.
  • the invention relates to an aerosol delivering system for an aerosol generating device, the aerosol delivering system comprising a reservoir storing a liquid vaporizable material, and a porous element arranged in fluid communication with the reservoir and designed to be in contact with a heater;
  • the vaporizable material in liquid form can be blocked in the reservoir preventing thus any leakage when the device is not being used.
  • the porous element is heated by the heater and aerosol formed in the porous element can be released in the airflow path through the liquid barrier.
  • hydrophobic material is chosen to be liquid impermeable and gas permeable.
  • the hydrophobic material comprises rare earth oxides.
  • the hydrophobic material comprises fluorosilanes.
  • the hydrophobic material comprises a porous lanthanide oxide layer.
  • the hydrophobic material is resistant up to 250°C, advantageously up to 300°C.
  • the porous element can be heated until an optimal temperature to form aerosol without deteriorating the properties of the coating formed by the hydrophobic material.
  • the liquid barrier formed by the hydrophobic material defines a porous structure with porous substantially thicker than porous formed by the porous element.
  • the particles forming aerosol have smaller dimensions than the liquid droplets so as the aerosol formed from the liquid material can pass through the liquid barrier.
  • the vaporizing surface is arranged perpendicularly to the contact surface.
  • the porous element can be achieved.
  • the airflow path can extend through the reservoir and the porous element can be heated by an external heater.
  • the vaporizing surface is in fluid communication with an airflow path.
  • the aerosol can be released directly to the airflow path avoiding thus pressure drops.
  • the vaporizing surface is arranged around the airflow path.
  • the aerosol can be released homogenously to the airflow path.
  • the porous element further defines a heating surface designed to be in contact with the heater, the heating surface being different from each of the contact surface and the vaporizing surface.
  • the porous element can be heated directly by the heater without affecting the other surfaces of the porous element and notably, without affecting the contact surface or the vaporizing surface.
  • the porous element is made of ceramic.
  • the porous element can form a solid and heat resistant element.
  • the porous element has an annular shape.
  • the aerosol can be released homogenously to the airflow path.
  • the present invention also relates to a cartridge configured to operate with an aerosol generating device, the cartridge comprising an aerosol delivering system as defined above.
  • the present invention also relates to an aerosol generating assembly comprising an aerosol delivering system as defined above.
  • the term "aerosol generating device” or “device” may include a vaping device to deliver an aerosol to a user, including an aerosol for vaping, by means of aerosol generating unit (e.g. an aerosol generating element which generates vapor which condenses into an aerosol before delivery to an outlet of the device at, for example, a mouthpiece, for inhalation by a user).
  • the device may be portable.
  • “Portable” may refer to the device being for use when held by a user.
  • the device may be adapted to generate a variable amount of aerosol, e.g. by activating a heating system for a variable amount of time (as opposed to a metered dose of aerosol), which can be controlled by a trigger.
  • the trigger may be user activated, such as a vaping button and/or inhalation sensor.
  • the inhalation sensor may be sensitive to the strength of inhalation as well as the duration of inhalation to enable a variable amount of vapor to be provided (so as to mimic the effect of smoking a conventional combustible smoking article such as a cigarette, cigar or pipe, etc.).
  • the device may include a temperature regulation control to drive the temperature of the heater and/or the heated aerosol generating substance (aerosol pre-cursor) to a specified target temperature and thereafter to maintain the temperature at the target temperature that enables efficient generation of aerosol.
  • aerosol may include a suspension of precursor as one or more of: solid particles; liquid droplets; gas. Said suspension may be in a gas including air. Aerosol herein may generally refer to/include a vapor. Aerosol may include one or more components of the precursor.
  • vaporizable material or "aerosol-forming precursor” may refer to one or more of a: liquid; solid; gel; mousse; foam or other substances.
  • the vaporizable material may be processable by the heating system of the device to form an aerosol as defined herein.
  • the vaporizable material may comprise one or more of: nicotine; caffeine or other active components.
  • the active component may be carried with a carrier, which may be a liquid.
  • the carrier may include propylene glycol or glycerin.
  • a flavoring may also be present. The flavoring may include Ethylvanillin (vanilla), menthol, Isoamyl acetate (banana oil) or similar.
  • a solid aerosol forming substance may be in the form of a rod, which contains processed tobacco material, a crimped sheet or oriented strips or shreds of reconstituted tobacco (RTB).
  • the term "hydrophobic material” may refer to any material having properties of liquid repealing. Particularly, in contact with a hydrophobic material, the droplets of a liquid, like a liquid vaporisable material, form a contact angle greater than 90°.
  • the hydrophobic material can comprises rare earth oxides, notably lanthanide series rare earth oxides (REOs).
  • REOs lanthanide series rare earth oxides
  • the hydrophobic material may also form or comprise a porous lanthanide oxide layer.
  • the hydrophobic material can comprises silanes, notably fluorosilanes.
  • FIG. 1 shows an aerosol delivering system 10 according to the invention.
  • the aerosol delivering system 10 is integrated entirely in a removable cartridge 12 which is adapted to operate with an aerosol generating device 11.
  • the aerosol generating device 11 forms together with the removable cartridge 12 an aerosol generating assembly 13 according to the invention.
  • the aerosol delivering system 10 is integrated at least partially in the aerosol generating device 11 and at least partially in the removable cartridge 12.
  • the aerosol generating device 11 also forms together with the removable cartridge 12 an aerosol generating assembly 13 according to the invention.
  • the aerosol delivering system 10 is integrated entirely in the aerosol generating device 11 which can for example be adapted to operate without removable cartridge.
  • the aerosol generating device 11 forms an aerosol generating assembly 13 according to the invention.
  • the aerosol generating device 11 extends along a device axis X and comprises a device body 21 having for example a cylindrical shape for example with a circular cross-section.
  • the device body 21 delimits a cavity 23 configured to receive, at least partially, the removable cartridge 12.
  • the device body 21 further delimits an internal space of the device 11 receiving various elements designed to carry out different functionalities of the device 11. This internal space can for example receive a power block for powering the device 11, a control module for controlling the operation of the device 11 and at least a device part of heating system configured to heat a vaporisable material contained in the removable cartridge 12.
  • the heating system is entirely formed by its device part and comprises notably a heater 25 powered by the power block through the control module and designed to be in contact with an external surface of the removable cartridge 12 as it will be explained in further detail below.
  • the device part of heating system is formed by a pair of contacts designed to be powered by the power block through the control module.
  • Other examples of the device part of heating system are still possible.
  • the internal space of the device body 21 may further comprise other internal components performing different functionalities of the device 11 known perse. These internal components will not be explained in detail below.
  • Figure 1 presents only a schematic diagram of the aerosol generating device 11 and cartridge 12, and does not necessarily show the real physical arrangement and dimensions of these elements. Particularly, such an arrangement can be chosen according to the design of the aerosol generating device 11 or the cartridge 12 and technical features of their components.
  • the aerosol delivering system 10 is entirely integrated in the cartridge 12.
  • this aerosol delivering system 10 can be arranged entirely inside a cartridge body 26 delimiting the cartridge 12.
  • the cartridge body 26 can extend along the device axis X when the cartridge 12 is received in the cavity 23 and has for example a substantially cylindrical shape for example with a circular cross-section.
  • the cartridge body 26 is shown in further detail on Figure 2 .
  • the aerosol delivering system 10 comprises a reservoir 31 storing a liquid vaporizable material as defined above, and a porous element 32 arranged in fluid communication with the reservoir 31 and designed to be in contact with the heater 25.
  • the reservoir 31 is for example arranged in the space formed between walls delimiting the cartridge body 26 and an airflow path 35 extending through the cartridge body 26 until a mouthpiece, according to the device axis X when the cartridge 12 is received in the cavity 23.
  • the reservoir 31 can thus form an annular cylindrical shape extending according to at least a half, advantageously three quarters, of the total longitudinal extension of the cartridge body 26.
  • the reservoir 31 forms an annular opening at its end adjacent to the porous element 32.
  • the porous element 32 is for example solid and formed from a heat-resistant material like ceramic. Additionally, the material forming the porous element 32 has relatively high heat transfer properties.
  • the porous element 32 defines a contact surface 41 designed to be in contact with the liquid vaporizable material, a vaporizing surface 43 designed to release aerosol formed upon heating the liquid vaporizable material by the heater 25 and a heating surface 45 designed to be in contact with the heater 25.
  • all these surfaces 41, 43, 45 are different one from the other.
  • the porous element 32 has an annular shape and is adjacent to the opening formed by the reservoir 31.
  • the contact surface 41 is perpendicular to the device axis X when the cartridge 12 is received in the cavity 23 and can cover entirely the opening formed by the reservoir 31.
  • a sealing member like a gasket, can be provided to seal entirely this opening by the contact surface 41.
  • the heating surface 45 is for example opposite to the contact surface 41. Additionally, in the example of Figure 1 , the heating surface 45 can form an external surface of the cartridge body 26 which is intended to be in tight contact with the heater 25 when the cartridge 12 is received in the cavity 23.
  • the cartridge 12 and/or the device 11 can form fixing means applying a mechanical force to abut the heating surface 45 against the heater 25.
  • the heater 25 can also form an annular shape, like for example a coil, to be in contact with the heating surface 45 along its whole circumference.
  • the heater 25 may be integrated in the cartridge body 26.
  • the heating system of the assembly 13 comprises therefore a cartridge part which is formed by the heater 25 and is connected for example electrically to the device part. Additionally, in this case, the heater 25 can be arranged in contact with the heating surface 45 inside the cartridge body 26 in any suitable way.
  • the vaporizing surface 43 is formed by an internal surface of the annular porous element 32. It can thus extend around and along the device axis X when the cartridge 12 is received in the cavity 23.
  • the vaporizing surface 43 can also for example extend the airflow path 35 until the heater 25, as it is shown on Figure 2 .
  • the vaporizing surface 43 is therefore perpendicular to both contact surface 41 and heating surface 45.
  • the vaporizing surface 43 is coated with a hydrophobic material forming a liquid barrier.
  • the hydrophobic material can be any suitable material as defined above. Particularly, the hydrophobic material is chosen to be liquid impermeable and gas permeable.
  • the vaporizing surface 43 forms a liquid barrier preventing liquid passage from the reservoir 31.
  • the heater 25 heats the porous element 32 and the liquid comprised in the porous element 32 or being in contact with the contact surface 41 can be vaporized forming aerosol. Since the vaporizing surface 43 is gas permeable, the aerosol can thus be released to the airflow path 35.
  • the coating of the vaporizing surface 43 can also form a porous structure as the porous element 32 itself.
  • the porous' dimensions of the coating can be smaller in comparison with those of the porous element 32 so as to block liquid from the porous element 32 as it shown on Figure 3 .
  • the porous' dimensions of the coating and the porous element 32 allow aerosol passage through these elements.

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  • Catching Or Destruction (AREA)
EP22156795.1A 2022-02-15 2022-02-15 Système de livraison d'aérosol comprenant un matériau hydrophobe, et cartouche associée et ensemble de génération d'aérosol Pending EP4226784A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22156795.1A EP4226784A1 (fr) 2022-02-15 2022-02-15 Système de livraison d'aérosol comprenant un matériau hydrophobe, et cartouche associée et ensemble de génération d'aérosol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22156795.1A EP4226784A1 (fr) 2022-02-15 2022-02-15 Système de livraison d'aérosol comprenant un matériau hydrophobe, et cartouche associée et ensemble de génération d'aérosol

Publications (1)

Publication Number Publication Date
EP4226784A1 true EP4226784A1 (fr) 2023-08-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22156795.1A Pending EP4226784A1 (fr) 2022-02-15 2022-02-15 Système de livraison d'aérosol comprenant un matériau hydrophobe, et cartouche associée et ensemble de génération d'aérosol

Country Status (1)

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EP (1) EP4226784A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170108210A1 (en) * 2014-10-20 2017-04-20 Numerical Design, Inc. Microfluidic-based apparatus and method for vaporization of liquids
WO2020070109A1 (fr) * 2018-10-03 2020-04-09 Philip Morris Products S.A. Système d'alimentation en liquide destiné à être utilisé dans des dispositifs de génération d'aérosol
CN112120291A (zh) * 2020-09-23 2020-12-25 深圳麦克韦尔科技有限公司 雾化芯、雾化器和电子雾化装置
EP3881692A1 (fr) * 2020-01-31 2021-09-22 KT&G Corporation Mèche poreuse, vaporisateur la comprenant, et dispositif de génération d'aérosol

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170108210A1 (en) * 2014-10-20 2017-04-20 Numerical Design, Inc. Microfluidic-based apparatus and method for vaporization of liquids
WO2020070109A1 (fr) * 2018-10-03 2020-04-09 Philip Morris Products S.A. Système d'alimentation en liquide destiné à être utilisé dans des dispositifs de génération d'aérosol
EP3881692A1 (fr) * 2020-01-31 2021-09-22 KT&G Corporation Mèche poreuse, vaporisateur la comprenant, et dispositif de génération d'aérosol
CN112120291A (zh) * 2020-09-23 2020-12-25 深圳麦克韦尔科技有限公司 雾化芯、雾化器和电子雾化装置

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