EP4169403A1 - Vorrichtung zur erzeugung von aerosolen mit reduziertem spuckeffekt - Google Patents

Vorrichtung zur erzeugung von aerosolen mit reduziertem spuckeffekt Download PDF

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Publication number
EP4169403A1
EP4169403A1 EP21204011.7A EP21204011A EP4169403A1 EP 4169403 A1 EP4169403 A1 EP 4169403A1 EP 21204011 A EP21204011 A EP 21204011A EP 4169403 A1 EP4169403 A1 EP 4169403A1
Authority
EP
European Patent Office
Prior art keywords
aerosol
electrical power
chosen
generation device
phase
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
EP21204011.7A
Other languages
English (en)
French (fr)
Inventor
Olayiwola Olamiposi POPOOLA
Greg STRETTON
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 EP21204011.7A priority Critical patent/EP4169403A1/de
Priority to US17/971,141 priority patent/US20230129806A1/en
Publication of EP4169403A1 publication Critical patent/EP4169403A1/de
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
    • A24F40/50—Control or monitoring
    • 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
    • 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
    • A24F40/42—Cartridges or containers for inhalable precursors

Definitions

  • the present invention relates to aerosol generation devices, and more precisely to the control of the composition of the aerosols that are generated by such aerosol generation devices during vaping sessions.
  • the invention concerns the aerosol generation devices often named "E-vapor devices" and comprising:
  • Some aerosol-forming liquids comprises at least first and second mixed compounds having respectively first and second boiling points. This is notably the case for those comprising Propylene Glycol (PG) and Vegetable Glycerin/Glycerol (VG) with different ratios. It is recalled that propylene glycol has a first boiling point between 185°C and 189°C, while vegetable glycerin/glycerol has a second boiling point around 290°C.
  • PG Propylene Glycol
  • VG Vegetable Glycerin/Glycerol
  • a first part of the aerosol-forming liquid (or "e-liquid") with the highest concentration of first compound (for instance PG) is located in the center of the heating area (generally a wick) surrounded by the heating element(s) of the heater, while a second part of the aerosol-forming liquid with the highest concentration of second compound (for instance VG) is located at the periphery of the heating area near the heating element(s).
  • the first compound (PG) newly introduced is heated above its first boiling point due to latent heat in the areas comprising a high concentration of hot and vaporized second compound (VG) and also due to the role of the heat capacity (i.e. if the VG build up is too much the temperature at the coil goes above the boiling point of PG, as does the VG rich area of the wick - this is what allows vaporisation of PG at the centre of the wick and thus bubbles of vapor forcing their way out from the centre and taking hot second compound rich liquid droplets with them, with symptoms such as cracks, pops, crackles).
  • VG hot and vaporized second compound
  • an object of this invention is to improve the situation, and notably to allow decreasing the spitting effect without inducing a noticeable cost increase or an increasing complexity of the internal architecture.
  • This aerosol generation device is characterized in that its controller is arranged for controlling this supply according to a chosen profile in which the electrical power varies over time depending on the first and second boiling points in order to control a vaporization ratio of the first and second compounds in the aerosol chamber.
  • the control of the level of the electrical power and of the duration at such a level allows to control the vaporization ratio of the first and second compounds, and therefore the ratio of vapor bubbles (rich of first compound) over unvaporized liquid droplets (rich of second compound) in the heating area, which allows reducing the spitting effect.
  • an aerosol generation device may comprise other aspects or features, considered separately or combined, as defined hereafter:
  • This method is characterized in that it comprises a step in which the controller controls the supply according to a chosen profile in which the electrical power varies over time depending on the first and second boiling points in order to control a vaporization ratio of the first and second compounds in the aerosol chamber.
  • the invention aims, notably, at proposing an aerosol generation device (or E-vapor device) 1, comprising a cartomizer 2 (comprising an aerosol-forming liquid comprising at least first and second mixed compounds having respectively first bp1 and second bp2 boiling points) and an electrical and control device 3, and subjected to a reduced spitting effect.
  • an aerosol generation device or E-vapor device
  • a cartomizer 2 comprising a aerosol-forming liquid comprising at least first and second mixed compounds having respectively first bp1 and second bp2 boiling points
  • an electrical and control device 3 comprising a cartomizer 2 (comprising an aerosol-forming liquid comprising at least first and second mixed compounds having respectively first bp1 and second bp2 boiling points) and an electrical and control device 3, and subjected to a reduced spitting effect.
  • the aerosol generation device 1 is an electronic cigarette (or e-cigarette or else personal vaporizer). But an aerosol generation device 1 according to the invention could be of another type, as soon as it allows the generation of an aerosol by heating an aerosol-forming liquid (or e-liquid). So, for instance, the aerosol generation device 1 could be an inhaler.
  • the aerosol-forming liquid comprises at least propylene glycol (or PG - first compound with a first boiling point bp1 between 185°C and 189°C) and vegetable glycerin/glycerol (or VG - second compound with a second boiling point bp2 around 290°C).
  • the aerosol-forming liquid may comprise one or more of nicotinoid(s), cannabinoid(s), caffeine, tobacco material, organic acids, salts, flavoring, and combinations thereof, and a carrier (e.g. a liquid solvent) which may include propylene glycol, glycerin/glycerol, trimethylene glycol, water, ethanol, and combinations thereof.
  • an aerosol may include a suspension of substance as one or more of solid particles, liquid droplets and gas. Such a suspension may be in a gas including air.
  • an aerosol generation device comprises at least a reservoir 5, a heater 18, an aerosol chamber 7, a power source 23 and a controller 27.
  • the reservoir 5, the heater 18 and the aerosol chamber 7 may be part of a cartomizer 2 (possibly exchangeable and illustrated in figure 1 ), while the power source 23 and the controller 27 may be part of an electrical and control device 3 (illustrated in figure 2 ).
  • the electrical and control device 3 and the cartomizer 2 are intended to be physically and electrically coupled together.
  • the cartomizer 2 may comprise a body 4 comprising the reservoir 5, the heater 18, an aerosol chamber 7, at least one first air inlet 11 and at least one aerosol outlet 16.
  • the reservoir 5 is arranged for storing an aerosol-forming liquid (or e-liquid) comprising at least first and second mixed compounds having respectively first bp1 and second bp2 boiling points.
  • the heater 18 is arranged for vaporizing (or aerosolizing) the aerosol-forming liquid mixed with air in the aerosol chamber 7 in order to generate an aerosol.
  • the (each) first air inlet 11 is set upstream the aerosol chamber 7 and in fluid communication therewith, in order to supply it with air originating from outside.
  • the (each) aerosol outlet 16 is set downstream the aerosol chamber 7 and in fluid communication therewith, in order to receive the generated aerosol when a user of the aerosol generation device 1 inhales during a vaping session.
  • the cartomizer body 4 may comprise an internal wall 6 defining the aerosol chamber 7. Also for instance, this internal wall 6 may have an annular shape.
  • the aerosol chamber 7 is fed with air (sucked in by the user) through each first air inlet 11 defined in the internal wall 6 (as illustrated by the two small arrows B in figure 2 ). This air comes from outside through at least one second air inlet 12 defined in the body 4 (as illustrated by the arrow C in figure 2 ). But, each second air inlet 12 could be defined in a wall of the body 13 of the electrical and control device 3.
  • the cartomizer body 4 may comprise a mouthpiece 8 comprising the (each) aerosol outlet 16 and allowing the user to inhale the generated aerosol through this aerosol outlet 16 during a vaping session (as illustrated by the arrows A in figure 2 ).
  • the aerosol chamber 7 is fluidly coupled to the mouthpiece 8 by a central conduit (or passage) 9 leading to the aerosol outlet 16.
  • the mouthpiece 8 may be integral with an end 10 of the cartomizer body 4 that receives the generated aerosol from the central conduit 9. But this mouthpiece 8 could be an additional part coupled to the cartomizer body 4.
  • the cartomizer body 4 may comprise an outer wall 17 defining a cavity, and the reservoir 5 may be delimited at least partially by this outer wall 17 and the central conduit 9.
  • the aerosol chamber 7 comprises the heater 18 that is arranged for heating the aerosol-forming liquid (originating from the reservoir 5) to generate the aerosol, when it receives electrical power (or energy) originating from the power source 23 of the electrical and control device 3.
  • This heater 18 may be a resistive heater, such as a resistive coil, and/or an inductive heater, such as a metallic susceptor.
  • the heater 18 may comprise one or more electrically activated resistive and/or inductive heating elements. The heating can be made by conduction, convection and/or radiation.
  • the aerosol-forming liquid can leave the reservoir 5 to reach the aerosol chamber 7 (see the four arrows D) through openings 15 defined in the internal wall 6.
  • the reservoir 5 may have an annular shape and a central passage defining the central conduit (or aerosol passage) 9.
  • the body 13 of the electrical and control device 3 may define a housing 26 intended for receiving a part of the cartomizer body 4.
  • the coupling between the cartomizer body 4 and the body 13 of the electrical and control device 3 can be done by permanent magnets 24 that may be located in the housing 26 and intended for attracting corresponding elements 25 of the cartomizer body 4.
  • the coupling between the cartomizer body 4 and the body 13 of the electrical and control device 3 could be done by screwing by means of corresponding threaded portions, for instance.
  • the body 13 of the electrical and control device 3 may comprise at least the controller (or control device) 27 and a possible user interface 28 in addition to the power source 23 (storing electrical energy).
  • the power source 23 may be a rechargeable battery.
  • the body 13 may comprise an electrical connector to which a charger cable may be connected during a charging session of the rechargeable battery 23.
  • a charger cable may be coupled to an (AC) adapter or to a wall socket.
  • the controller 27 is electrically coupled to the power source 23 and controls the operation of the cartomizer 2 (and notably its heater 18) during a vaping session and also during a possible charging session.
  • the controller 27 may be fixed onto a printed circuit board 29 (housed in the body 13).
  • controller should not be construed to refer exclusively to hardware capable of executing software, and may implicitly include, without limitation, digital signal processor (DSP) hardware, processor, application specific integrated circuit (ASIC), field programmable gate array (FPGA), read only memory (ROM) for storing software, random access memory (RAM), and non volatile storage. Other hardware, conventional and/or custom, may also be included.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • ROM read only memory
  • RAM random access memory
  • controller 27 may be carried out through the operation of program logic, through dedicated logic, through the interaction of program control and dedicated logic, or even manually (by the user). These functions may be provided through the use of dedicated hardware as well as hardware capable of executing software in association with appropriate software.
  • the possible user interface 28 is coupled to the controller 27 and the power source 23 to allow the user to control at least partly the controller 27.
  • the user interface 28 may comprise a display (such as a screen or light emitting diode (or LED)-type interface) arranged for displaying information relative to a current vaping session or a possible current charging session and for allowing the user to control the controller 27.
  • the user interface 28 may be fixed partly to the printed circuit board 29 to ease and simplify its connections with the controller 27.
  • the cartomizer 2 and the electrical and control device 3 may comprise respectively electrical pins intended for contacting each other during their coupling to allow the feeding of the heater 18 with electrical power (or energy) during a vaping session.
  • the aerosol chamber 7 may comprise an aerosol-forming liquid transport element 33 to transport aerosol-forming liquid from the openings 15 of the internal wall 6 to the heater 18.
  • this aerosol-forming liquid transport element 33 may be a capillary element (possibly a capillary wick) having two opposite ends set in front of the openings 15, and possibly against the latter (and therefore against the internal surface of the internal wall 6).
  • the aerosol-forming liquid transport element 33 may traverse two large openings (larger than those referenced 15) and defined in the internal wall 6 to finish in the reservoir 5.
  • the capillary element 33 can be a fiber or ceramic rod, for instance.
  • the heater 18 may comprise a resistive coil wound around the capillary element 33 and connected to internal electrodes via lead wires. In this case the windings of the heater 18 define a heating area comprising at least a part of the capillary element 33 and in which the aerosol-forming liquid (to be heated and originating from the reservoir 5) is introduced.
  • the controller 27 is arranged for controlling supply of electrical power (ep) to the heater 18, during each inhalation phase of a vaping session, according to a chosen electrical power profile. More precisely, in this chosen profile the electrical power varies over time depending on the first bp1 and second bp2 boiling points in order to control the vaporization ratio of the first and second compounds in the aerosol chamber 7 (and more particularly in the heating area).
  • control of the level of the electrical power and of the duration at such a level allows to control the vaporization ratio of the first and second compounds when taking also into account the difference between the boiling points of these first and second compounds. So, the profile depends on the first and second compounds, and allows reducing the spitting effect since the vaporization ratio, and therefore the ratio of vapor bubbles (rich of first compound) over unvaporized liquid droplets (rich of second compound) in the heating area, can be now controlled.
  • the controller 27 is arranged for controlling the supply of the heater 18 according to a chosen profile that allows minimizing the vaporization ratio of the first and second compounds in the aerosol chamber 7.
  • the controller 27 may be arranged for controlling the supply of the heater 18 according to a chosen profile comprising three successive phases.
  • the first phase p11 has a first duration d11 at a first electrical power ep11.
  • the second phase p12 has a second duration d12 at a second electrical power ep12 greater than the first electrical power ep11.
  • the third phase p13 has a third duration d13 at a third electrical power ep13 greater than the second electrical power ep12.
  • the first electrical power ep11 corresponds to a low power
  • the second electrical power ep12 corresponds to a medium power
  • the third electrical power ep13 corresponds to a high power.
  • This first example of embodiment allows minimization of the temperature rise difference to achieve a reduction of the vaporization ratio vr1 and therefore of the spitting effect.
  • the first d11, second d12 and third d13 durations may be equal to a chosen first value v1. But they could be different one from the other.
  • the chosen first value v1 may be comprised between 150 ms and 250 ms.
  • the chosen first value v1 may be equal to 200 ms.
  • other first values v1 may be used, preferably as long as the sum of the first d11, second d12 and third d13 durations remains smaller or equal to the duration of a "standard puff" (which is generally considered equal to 3 s).
  • the controller 27 may be arranged for controlling the supply of the heater 18 according to a chosen profile comprising five successive phases.
  • the first phase p21 has a first duration d21 at a first electrical power ep13.
  • the second phase p22 has a second duration d22 at an electrical power equal to zero.
  • the third phase p23 has a third duration d23 at the first electrical power ep13.
  • the fourth phase p24 has a fourth duration d24 at an electrical power equal to zero.
  • the fifth phase p25 has a fifth duration d25 at the first electrical power ep13.
  • the first electrical power ep13 corresponds to a high power.
  • This second example of embodiment allows reducing the time to first vapor whilst achieving a minimal spitting effect.
  • the high power required to achieve the high aerosol output could be applied in short bursts first to allow the first and second compounds to rise up closer together to achieve a reduction of the vaporization ratio vr2 and therefore of the spitting effect.
  • the first d21, third d23 and fifth d25 durations may be equal to a chosen second value v2. But they could be different one from the other, preferably as long as the sum of the first d21, second d22, third d23, fourth d24 and fifth d25 durations remains smaller or equal to the duration of a "standard puff" (which is generally considered equal to 3 s).
  • the chosen second value v2 may be comprised between 70 ms and 130 ms.
  • the chosen second value v2 may be equal to 100 ms.
  • other second values v2 may be used, preferably as long as the sum of the first d21, second d22, third d23, fourth d24 and fifth d25 durations remains smaller or equal to the duration of a standard puff.
  • the second d22 and fourth d24 durations may be equal to a chosen third value v3. But they could be different one from the other.
  • this chosen third value v3 may be comprised between 10 ms and 50 ms.
  • the chosen third value v3 may be equal to 30 ms.
  • other third values v3 may be used, preferably as long as the sum of the first d21, second d22, third d23, fourth d24 and fifth d25 durations remains smaller or equal to the duration of a standard puff.
  • the controller 27 may be arranged for controlling the supply of the heater 18 according to a chosen profile comprising a single phase p4 having a chosen duration d4 during which the electrical power ep strictly increases.
  • This third example of embodiment allows to control the difference in the rate of change of temperature in the first and second compounds to reduce the vaporization ratio vr3 and therefore the spitting effect. This means that it will take longer for the spitting effect to happen, but this is not a problem since the control delays the spitting effect beyond the time of a standard puff, or at the very least the spitting effect will occur for a shorter duration and will therefore be reduced.
  • the chosen profile may comprise a phase p4 during which the electrical power ep varies as a logarithmic function.
  • the chosen duration d4 may be comprised between 550 ms and 650 ms.
  • the chosen duration d4 may be equal to 600 ms. But other chosen durations d4 may be used.
  • the invention can also be considered as a control method intended for controlling aerosol generation by the aerosol generation device 1.
  • This control method comprises a step in which the controller 27 controls the supply of the heater 18 according to a chosen profile in which the electrical power varies over time depending on the first bp1 and second bp2 boiling points in order to control a vaporization ratio of the first and second compounds in the aerosol chamber 7.

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  • Catching Or Destruction (AREA)
EP21204011.7A 2021-10-21 2021-10-21 Vorrichtung zur erzeugung von aerosolen mit reduziertem spuckeffekt Pending EP4169403A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21204011.7A EP4169403A1 (de) 2021-10-21 2021-10-21 Vorrichtung zur erzeugung von aerosolen mit reduziertem spuckeffekt
US17/971,141 US20230129806A1 (en) 2021-10-21 2022-10-21 Aerosol Generation Device with Reduced Spitting Effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21204011.7A EP4169403A1 (de) 2021-10-21 2021-10-21 Vorrichtung zur erzeugung von aerosolen mit reduziertem spuckeffekt

Publications (1)

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EP4169403A1 true EP4169403A1 (de) 2023-04-26

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EP21204011.7A Pending EP4169403A1 (de) 2021-10-21 2021-10-21 Vorrichtung zur erzeugung von aerosolen mit reduziertem spuckeffekt

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US (1) US20230129806A1 (de)
EP (1) EP4169403A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170086505A1 (en) * 2015-09-24 2017-03-30 Lunatech, Llc Electronic Vapor Device With Film Assembly
US20170224019A1 (en) * 2012-12-28 2017-08-10 Philip Morris Products S.A. Heated aerosol-generating device and method for generating aerosol with consistent properties
WO2020064876A1 (en) * 2018-09-28 2020-04-02 Philip Morris Products S.A. Aerosol-generating system providing preferential evaporation of nicotine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170224019A1 (en) * 2012-12-28 2017-08-10 Philip Morris Products S.A. Heated aerosol-generating device and method for generating aerosol with consistent properties
US20170086505A1 (en) * 2015-09-24 2017-03-30 Lunatech, Llc Electronic Vapor Device With Film Assembly
WO2020064876A1 (en) * 2018-09-28 2020-04-02 Philip Morris Products S.A. Aerosol-generating system providing preferential evaporation of nicotine

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US20230129806A1 (en) 2023-04-27

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