EP3795001A1 - Rauchersatzvorrichtung - Google Patents

Rauchersatzvorrichtung Download PDF

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Publication number
EP3795001A1
EP3795001A1 EP19198541.5A EP19198541A EP3795001A1 EP 3795001 A1 EP3795001 A1 EP 3795001A1 EP 19198541 A EP19198541 A EP 19198541A EP 3795001 A1 EP3795001 A1 EP 3795001A1
Authority
EP
European Patent Office
Prior art keywords
air
vaporiser element
aerosol
vaporiser
flow rate
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
EP19198541.5A
Other languages
English (en)
French (fr)
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
Original Assignee
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 EP19198541.5A priority Critical patent/EP3795001A1/de
Priority to EP20789849.5A priority patent/EP3930515A1/de
Priority to PCT/EP2020/076294 priority patent/WO2021053225A1/en
Publication of EP3795001A1 publication Critical patent/EP3795001A1/de
Priority to US17/694,128 priority patent/US20220192260A1/en
Ceased 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
    • A24F40/48—Fluid transfer means, e.g. pumps
    • 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

  • Such smoking substitute systems can form part of nicotine replacement therapies aimed at people who wish to stop smoking and overcome a dependence on nicotine.
  • Known smoking substitute systems include electronic systems that permit a user to simulate the act of smoking by producing an aerosol (also referred to as a "vapour") that is drawn into the lungs through the mouth (inhaled) and then exhaled.
  • the inhaled aerosol typically bears nicotine and/or a flavourant without, or with fewer of, the health risks associated with conventional smoking.
  • smoking substitute systems are intended to provide a substitute for the rituals of smoking, whilst providing the user with a similar, or improved, experience and satisfaction to those experienced with conventional smoking and with combustible tobacco products.
  • the present invention permits the generation of smoking substitute aerosols with particle size Dv50 in the range 1.5-5 ⁇ m.
  • the air inlet, flow passage, outlet and the vaporisation chamber may be configured so that, when air is drawn between the air inlet and outlet by user inhalation at a first flow rate of 1.3 L min -1 and at a second flow rate of 2.0 L min -1 , the generated aerosol satisfies the following characteristics:
  • the average magnitude of velocity of air in the vaporiser element region may be at least 0.001 ms -1 , or at least 0.005 ms -1 , or at least 0.01 ms -1 , or at least 0.05 ms -1 .
  • the resultant aerosol particle size is advantageously controlled to be in a desirable range. It is further considered that the velocity of air in the vaporiser element region is more relevant to the resultant particle size characteristics than consideration of the velocity in the vaporisation chamber as a whole. This is in view of the significant effect of the velocity of air in the vaporiser element region on the cooling of the vapour emitted from the vaporiser element surface.
  • the maximum magnitude of velocity of air in the vaporiser element region may be at most 1.9 ms -1 , at most 1.8 ms -1 , at most 1.7 ms -1 , at most 1.6 ms -1 , at most 1.5 ms -1 , at most 1.4 ms -1 , at most 1.3 ms -1 or at most 1.2 ms -1 .
  • the air inlet, flow passage, outlet and the vaporisation chamber may be configured so that, when the air flow rate inhaled by the user through the apparatus is 1.3 L min -1 , the turbulence intensity in the vaporiser element region is not more than 1%.
  • the testing protocol set out above considers the cooling of the vapour (and subsequent aerosol) to a temperature of 50 °C. This is a temperature which can be considered to be suitable for an aerosol to exit the apparatus for inhalation by a user without causing significant discomfort. It is also possible to consider cooling of the vapour (and subsequent aerosol) to a temperature of 75 °C. Although this temperature is possibly too high for comfortable inhalation, it is considered that the particle size characteristics of the aerosol are substantially settled by the time the aerosol cools to this temperature (and they may be settled at still higher temperature).
  • the smoking substitute apparatus may comprise a reservoir configured to store an aerosol precursor, such as an e-liquid.
  • the e-liquid may, for example, comprise a base liquid.
  • the e-liquid may further comprise nicotine.
  • the base liquid may include propylene glycol and/or vegetable glycerine.
  • the e-liquid may be substantially flavourless. That is, the e-liquid may not contain any deliberately added additional flavourant and may consist solely of a base liquid of propylene glycol and/or vegetable glycerine and nicotine.
  • the heater may comprise a heating element, which may be in the form of a filament wound about the wick (e.g. the filament may extend helically about the wick in a coil configuration).
  • the heating element may be wound about the intermediate portion of the wick that is exposed to air flow in the passage.
  • the heating element may be electrically connected (or connectable) to a power source.
  • the power source may apply a voltage across the heating element so as to heat the heating element by resistive heating. This may cause liquid stored in the wick (i.e. drawn from the tank) to be heated so as to form a vapour and become entrained in air flowing through the passage. This vapour may subsequently cool to form an aerosol in the passage, typically downstream from the heating element.
  • the smoking substitute apparatus may comprise a vaporisation chamber.
  • the vaporisation chamber may form part of the passage in which the heater is located.
  • the vaporisation chamber may be arranged to be in fluid communication with the inlet and outlet of the passage.
  • the vaporisation chamber may be an enlarged portion of the passage.
  • the air as drawn in by the user may entrain the generated vapour in a flow away from heater.
  • the entrained vapour may form an aerosol in the vaporisation chamber, or it may form the aerosol further downstream along the passage.
  • the vaporisation chamber may be at least partially defined by the tank.
  • the tank may substantially (or fully) define the vaporisation chamber. In this respect, the tank may surround the vaporisation chamber, e.g. in an annular arrangement around the vaporisation chamber.
  • the smoking substitute system 110 is configured to vaporise the e-liquid 160 for inhalation by a user.
  • the consumable 150 comprises a heater having a porous wick 162 and a resistive heating element in the form of a heating filament 164 that is helically wound (in the form of a coil) around a portion of the porous wick 162.
  • the porous wick 162 extends across the passage 170 (i.e. transverse to a longitudinal axis of the passage 170 and thus also transverse to the air flow along the passage 170 during use) and opposing ends of the wick 162 extend into the tank 152 (so as to be immersed in the e-liquid 160). In this way, e-liquid 160 contained in the tank 152 is conveyed from the opposing ends of the porous wick 162 to a central portion of the porous wick 162 so as to be exposed to the airflow in the passage 170.
  • the helical filament 164 is wound about the exposed central portion of the porous wick 162 and is electrically connected to an electrical interface in the form of electrical contacts 156 mounted at the end of the consumable that is proximate the main body 120 (when the consumable and the main body are engaged).
  • electrical contacts 156 make contact with corresponding electrical contacts (not shown) of the main body 120.
  • the main body electrical contacts are electrically connectable to a power source (not shown) of the main body 120, such that (in the engaged position) the filament 164 is electrically connectable to the power source. In this way, power can be supplied by the main body 120 to the filament 164 in order to heat the filament 164.
  • the main body 120 may include a puff sensor (not shown) that is configured to detect a puff (i.e. inhalation).
  • the puff sensor may be operatively connected to the controller so as to be able to provide a signal, to the controller, which is indicative of a puff state (i.e. puffing or not puffing).
  • the puff sensor may, for example, be in the form of a pressure sensor or an acoustic sensor.
  • Pod 2 shown in longitudinal cross sectional view (in the width plane) in Figure 7 , has a main housing that defines a tank 160y holding an e-liquid aerosol precursor. Mouthpiece 154y is formed at the upper part of the pod. Electrical contacts 156y are formed at the lower end of the pod. Wick 162y is held in a vaporisation chamber. The air flow direction is shown using arrows. Pod 2 has an extended inflow path (plenum chamber 157y) with a flow conditioning element 159y, configured to promote reduced turbulence at the wick 162y.
  • the inflow and outflow settings in heat transfer physics was configured in the same way as in the two-phase flow model.
  • the air inflow was set to 25 °C
  • the vapour inflow was set to 209 °C (boiling temperature of the e-liquid formulation).
  • the heat transfer physics is configured to be two-way coupled with the laminar mixture flow physics.
  • the above model reaches steady state after approximately 0.2 second with a step size of 0.001 second.
  • Particle size measurement results for the rectangular tube testing are shown in Table 4.
  • Table 4 For every tube size and flow rate combination, five repetition runs were carried out in the Spraytec laser diffraction system. The Dv50 values from five repetition runs were averaged, and the standard deviations were calculated to indicate errors, as shown in Table 4.
  • vapour cooling rates for each tube size and flow rate combination were obtained via multiphysics simulation.
  • particle size measurement results were plotted against vapour cooling rate to 50°C and 75°C, respectively.

Landscapes

  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
EP19198541.5A 2019-09-20 2019-09-20 Rauchersatzvorrichtung Ceased EP3795001A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP19198541.5A EP3795001A1 (de) 2019-09-20 2019-09-20 Rauchersatzvorrichtung
EP20789849.5A EP3930515A1 (de) 2019-09-20 2020-09-21 Rauchersatzvorrichtung
PCT/EP2020/076294 WO2021053225A1 (en) 2019-09-20 2020-09-21 Smoking substitute apparatus
US17/694,128 US20220192260A1 (en) 2019-09-20 2022-03-14 Smoking substitute apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19198541.5A EP3795001A1 (de) 2019-09-20 2019-09-20 Rauchersatzvorrichtung

Publications (1)

Publication Number Publication Date
EP3795001A1 true EP3795001A1 (de) 2021-03-24

Family

ID=67998257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19198541.5A Ceased EP3795001A1 (de) 2019-09-20 2019-09-20 Rauchersatzvorrichtung

Country Status (1)

Country Link
EP (1) EP3795001A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015042412A1 (en) * 2013-09-20 2015-03-26 E-Nicotine Technology. Inc. Devices and methods for modifying delivery devices
WO2016050244A1 (en) * 2014-10-03 2016-04-07 Fertin Pharma A/S Electronic nicotine delivery system
EP3155908A1 (de) * 2015-10-16 2017-04-19 Fontem Holdings 1 B.V. Elektronische rauchvorrichtung mit anpassbarer sprühkammer
WO2018037562A1 (ja) * 2016-08-26 2018-03-01 日本たばこ産業株式会社 非燃焼型香味吸引器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015042412A1 (en) * 2013-09-20 2015-03-26 E-Nicotine Technology. Inc. Devices and methods for modifying delivery devices
WO2016050244A1 (en) * 2014-10-03 2016-04-07 Fertin Pharma A/S Electronic nicotine delivery system
EP3155908A1 (de) * 2015-10-16 2017-04-19 Fontem Holdings 1 B.V. Elektronische rauchvorrichtung mit anpassbarer sprühkammer
WO2018037562A1 (ja) * 2016-08-26 2018-03-01 日本たばこ産業株式会社 非燃焼型香味吸引器

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