EP4369958A1 - Chambre de chauffage pour dispositif de génération d'aérosol - Google Patents

Chambre de chauffage pour dispositif de génération d'aérosol

Info

Publication number
EP4369958A1
EP4369958A1 EP22744748.9A EP22744748A EP4369958A1 EP 4369958 A1 EP4369958 A1 EP 4369958A1 EP 22744748 A EP22744748 A EP 22744748A EP 4369958 A1 EP4369958 A1 EP 4369958A1
Authority
EP
European Patent Office
Prior art keywords
heating chamber
walls
aerosol
arc electrodes
pair
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
EP22744748.9A
Other languages
German (de)
English (en)
Inventor
Alec WRIGHT
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 EP4369958A1 publication Critical patent/EP4369958A1/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
    • A24F40/46—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
    • A24F40/20—Devices using solid inhalable precursors

Definitions

  • reduced-risk or modified-risk devices also known as vaporisers
  • vaporisers 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.
  • Various devices and systems are available that heat or warm aerosolisable substances as opposed to burning tobacco in conventional tobacco products.
  • the aerosol produced by heating the tobacco or other aerosolisable material does not typically comprise the burnt or bitter taste resulting from combustion and burning that can be unpleasant for the user and so the substrate does not therefore require the sugars and other additives that are typically added to such materials to make the smoke and/or vapour more palatable for the user.
  • the user when using an aerosol generation device, the user must wait for the aerosol substrate to reach a required temperature for aerosol generation.
  • Arc electrodes provide an alternative way of supplying heat to the heating chamber. Additionally, the arc electrodes can provide a way of rapidly supplying localized heat to a specific area of the heating chamber.
  • the spark gap has a breakdown voltage of less than 10kV.
  • the breakdown voltage When the breakdown voltage is reached, the arc electrodes suddenly draw a power that increases with the breakdown voltage.
  • the breakdown voltage for example by changing the size of the spark gap between the electrodes
  • the sudden change in power draw can be limited, reducing stress on the power supply.
  • the arc electrodes comprise nickel, iridium or platinum.
  • Nickel, iridium and platinum have relatively high melting points compared to, for example, copper or gold circuitry, and may be used to increase the lifetime of the arc electrodes.
  • the one or more walls of the heating chamber are thermally conductive, and the pair of arc electrodes is arranged on an outer surface of the one or more walls.
  • This arrangement mean that the arc electrodes are separated from the aerosol substrate, and maintenance of the arc electrodes is simplified across multiple uses of the heating chamber to heat the aerosol substrate.
  • the heating chamber comprises an inner volume defined by an inner surface of the one or more walls, the inner surface of the one or more walls comprises a protrusion extending into the inner volume, the outer surface of the one or more walls comprises a recess corresponding to the protrusion, and the spark gap extends across the recess.
  • a protrusion as described here may, for example, be used to position the aerosol substrate within the heating chamber, to define an air flow channel around the aerosol substrate, and/or to compress the aerosol substrate.
  • such an inward protrusion may be more difficult to heat.
  • the recess provides a suitable location for a heating element configured to supply heat locally to the protrusion.
  • a pair of arc electrodes may advantageously be arranged such that the spark gap extends across the recess in order to provide a localized supply of heat to the protrusion.
  • the heating chamber is a tubular heating chamber
  • the protrusion is a rib extending along an axis of the tubular heating chamber.
  • the rib can provide an extended guide to position the aerosol substrate, define an air flow channel around the aerosol substrate and/or compress the aerosol substrate along an extended section of the aerosol substrate.
  • a plurality of pairs of arc electrodes are arranged on the one or more walls, each pair forming a respective spark gap across the recess, and the pairs of electrodes being spaced axially along the tubular heating chamber.
  • This configuration of pairs of arc electrodes may advantageously be used with a rib shaped protrusion extending along the axis of the tubular heating chamber, to provide localized heating along the length of the rib.
  • the inner surface of the one or more walls comprises a plurality of ribs arranged around the axis of the tubular heating chamber
  • the outer surface of the one or more walls comprises a recess corresponding to each protrusion
  • a respective pair of arc electrodes is arranged on the one or more walls to form a spark gap across each recess.
  • a plurality of heated ribs may be used to further position the aerosol substrate, define an air flow channel around the aerosol substrate, and/or compress the aerosol substrate, while supplying heat more evenly.
  • the heating chamber further comprises a planar heater extending around the one or more walls.
  • a planar heater may be provided to supply a uniform heat from around the heating chamber. This may be used in cooperation with the pair of arc electrodes, which provide localized heat at one specific required position.
  • the present disclosure provides an aerosol generation device comprising: a heating chamber comprising one or more walls adapted to receive an aerosol substrate, and a pair of arc electrodes arranged on the one or more walls to form a spark gap; and a power source connected to the pair of arc electrodes and configured to apply a voltage between the pair of arc electrodes that is greater than a predetermined breakdown voltage of the spark gap, in order supply heat to the heating chamber.
  • the predetermined breakdown voltage is at least 500V.
  • Fig. 1 is a schematic cross-section of a known aerosol generating system
  • Fig. 2 is a schematic cross-section of a first heating chamber for an aerosol generation device according to the invention
  • Fig. 3 is a schematic cross-section of a second heating chamber for an aerosol generation device according to the invention.
  • Figs. 4A and 4B are schematic illustrations of alternative rib recesses on an outer surface of a heating chamber for an aerosol generation device according to the invention
  • Fig. 6 is a schematic block diagram of an aerosol generation device according to the invention.
  • Fig. 7 is a schematic cross-section of a further alternative heating chamber for an aerosol generation device according to the invention.
  • Fig. 8 is a schematic cross-section of a further alternative heating chamber for an aerosol generation device according to the invention.
  • Fig. 1 is a schematic cross-section of a known aerosol generating system (similar to, for example, the applicant’s prior European patent application 20162547.2).
  • the consumable 1 comprises a rod-shaped portion 11 and a filter 12.
  • the wrapper 13 may, for example, comprise paper, a combination of paper aluminium foil, cardboard, or any material suitable for storing an aerosol generating substrate and allowing the substrate to be heated in the heating chamber.
  • the wrapper can be paper with air permeability 0-50 CU, basis weight of 25-80 g/m 2 and thickness 30-80 pm with or without aluminium foil of 20-30 pm thickness.
  • the wrapper 13 may be omitted in embodiments where the substrate is self-supporting, for example where the substrate is a compressed tobacco substrate having soft granular texture such as described in applications EP 19209350.8 entitled “crumbed tobacco substrate” or EP 19209346.6 entitled “hot pressed tobacco substrate”.
  • the heating chamber 21 is a tubular structure with an internal hollow in which the consumable 1, or the rod-shaped portion 11 of the consumable 1, may be received.
  • the heating chamber comprises a side wall extending between a first end 212 and a second end 213.
  • the first end 212 is open, or openable in use, in order to allow the rod-shaped portion 11 to be inserted.
  • the second end 213 may be open as shown in Fig. 1, in order to provide an air inlet for air to flow through the consumable.
  • the second end 213 may be closed in order to improve heating efficiency of the heating chamber 21.
  • the second end may form the bottom of the heating chamber 21 and be formed in a single piece with the tubular wall of the chamber.
  • the heating chamber may be made of heat conductive material, preferably stainless steel or aluminium.
  • the heater 22 may be any heater suitable to deliver heat into the internal hollow of the heating chamber 21 through its side wall.
  • the heater 22 may be a planar heater attached to a flexible support and wrapped around the side wall of the heating chamber 21.
  • a planar heater may be in the form of a resistive track driven by electricity
  • the support may be one or more plastic or polymer sheets, for example a polyimide, a fluoropolymer such as PTFE, or a polyetheretherketone (PEEK).
  • PEEK polyetheretherketone
  • other types of heater may be used such as ones in which heat is provided by a chemical reaction such as fuel combustion.
  • the heating chamber may further be surrounded by a heat insulator such as a vacuum tube, heat insulation fibre (e.g. Superwool) and/or aerogel.
  • the heating chamber 21 has a greater width than the rod shaped portion 11, in a direction perpendicular to a length axis of the rod-shaped portion 11.
  • the gap formed between the heating chamber and the rod-shaped portion allows sufficient air to flow from the open first end 212 or second end 213 to the rod-shaped portion for extraction of the aerosol from the aerosol generating substrate. This also means that an end of the rod-shaped portion 11 can be more easily inserted into the heating chamber 21 without requiring precise alignment before or during insertion.
  • the protrusions 211 engage with and apply pressure to the consumable 1 in order to position the consumable securely within the chamber 21 at a position where it can be heated with greater efficiency.
  • the consumable 1 may be configured with a diameter greater than the space provided between the protrusions 211 such that the consumable 1 is compressed as it is positioned by the protrusions 211. This compression may further improve generation of aerosol from the consumable 1.
  • the protrusions 211 may similarly be configured symmetrically relative to the length axis (i.e. around the length axis on an inner perimeter of the heating chamber 21) in order to assist positioning the consumable at a center of the chamber.
  • “at a center” means substantially near the center in terms of the width of the chamber 21.
  • the protrusions 211 may take the form of ribs extending along the side wall, parallel to the length axis of the rod-shaped portion 11.
  • the ribs may be tapered towards the first end 212 of the heating chamber 21, in order to guide the consumable into a preferred position for heating.
  • the protrusions 211 also have the disadvantage of increasing a distance between the heater 22 and the consumable 1, and decreasing the thermal contact between the consumable 1 and the side wall of the chamber 21.
  • This increased distance between the heater 22 and the consumable 1 can mean that the temperature of the protrusions 211 is lower than desired.
  • the protrusions 211 may be intended to provide the hottest points of the chamber 21, in order to deliver heat more efficiently to the rod shaped portion 11.
  • the distance between the heater 22 and the protrusions 211 can mean that the ends of the protrusions 211 are cooler than the rest of the chamber 21.
  • Embodiments of the invention provide such localized heat, for example as shown in Figs. 2, 3, 4A, 4B, 7 and 8.
  • the heating chamber 21 may have a similar shape as described for Fig. 1.
  • the heating chamber 21 may have a tubular shape (such as a curved or polygonal tube), with an opening at at least one end, and a tube shape extending along an axis from the opening.
  • the tube is open at both ends, but one end 213 may be closed.
  • Fig. 2 is a cross-section perpendicular to the axis along which the tubular shape extends.
  • the internal surface of the rib protrusions 211 follows a smooth curve.
  • the smooth curve is preferably the arc of a circle or a parabola, such that the consumable can deform along the surface, and increase contact area between the protrusion 211 and the consumable 1 for improved thermal contact.
  • the smooth curve has a radius of curvature of at least 0.2 mm, or more preferably at least 0.5 mm, these being relatively “blunt” curves which are less likely to break the consumable 1.
  • the heating chamber 21 may be formed from ceramic or metal.
  • the protrusions and recesses of the heating chamber 21 may be formed by bending or stamping sheet metal.
  • the heating chamber 21 is formed by deep drawing comprising: forming a metal disk blank it into an initial metal cup, annealing under vacuum or inert gas; and deep drawing the initial metal cup into an elongated tubular cup with a reduced tubular wall thickness as described in patent application EP 19196023.6 entitled “heating chamber”.
  • the first heating chamber differs from the previous configuration of Fig. 1 primarily in that instead of the outer heater 22, the heating chamber 21 comprises one or more pairs of arc electrodes 23.
  • Each pair of arc electrodes 23 comprises a first electrode 231 and a second electrode 232 separated by a spark gap.
  • the pair of arc electrodes are configured to be connected to a power supply and, when a breakdown voltage is applied by the power supply between the first electrode and second electrode, to dissipate heat in an electrical arc between the first electrode and second electrode.
  • Spark gaps have been used in other technical fields to provide localized heat. For example, spark gaps are used in some internal combustion engines.
  • the first and second electrodes 231, 232 are preferably constructed from materials suitable for the temperatures associated with electrical arcs. As mentioned in the background, a typical temperature range for conventional aerosol generation devices is 150°C to 350°C. However, the electron temperature associated with spark discharge can be in the range of 10,000°C, in a localised sense. This does not translate into such high average temperatures in a bulk gas filling the spark gap, which are typically in the more conventional range of hundreds of degrees Celsius.
  • the first and second electrodes 231 , 232 may be driven based on a power supply with a small duty cycle (such as 5% or less, or 1% or less).
  • the electron temperature is significant where the path of a spark discharge approaches the first and second arc electrodes, where even a short-lived and local high temperature can damage the surface of the first and second arc electrodes.
  • a high-melting-temperature material is preferable for the surface of the arc electrodes, such as nickel, iridium or platinum, in order to slow degradation due to arcing, and increase the useful lifetime of the first and second electrodes.
  • the breakdown voltage of the spark gap depends upon the width of the gap, the composition of gas in the gap, and the pressure of gas in the gap, according to Paschen’s Law.
  • the first and second electrodes are separated by an unpressurized air gap, and the breakdown voltage is primarily controlled by varying the width of the gap.
  • the gas temperature and potentially gas pressure will increase during operation of the aerosol generation device, and thus the power supply must be able to apply the highest breakdown voltage across the range of operating temperatures at which the pair of arc electrodes may be used (for example, in the temperature range of 0°C to 350°C).
  • the spark gap has a breakdown voltage of at least 500V and less than 10kV across the range of operating temperatures.
  • the first and second electrodes 231, 232 are also preferably point electrodes, such as protruding pins, to reduce the gap capacitance and the breakdown voltage.
  • the pairs of electrodes 23 are arranged on an outer surface of the heating chamber 21. More specifically, each pair of electrodes 23 are arranged so that the spark gap extends across the recess on the outer surface of a rib protrusion. With this configuration, the pairs of arc electrodes 23 can provide localized heat to the rib protrusions.
  • the pairs of arc electrodes 23 are distributed symmetrically around a center of the tubular heating chamber 21.
  • four pairs of arc electrodes 23 may be distributed at 90-degree intervals around the center.
  • a pair of arc electrodes 23 may be arranged in the recess of every rib protrusion, although this is not essential.
  • Fig. 3 is a schematic cross-section of a second heating chamber for an aerosol generation device.
  • the second heating chamber is largely similar to the first heating chamber described with respect to Fig. 2, and only the differences are described below.
  • a sleeve or wrap 22 that is arranged around an outer surface of the side wall of the heating chamber 21.
  • the sleeve or wrap 22 preferably comprises a further heating element configured to supply additional heat similarly to the configuration in of heating unit 22 in Fig. 1.
  • the sleeve or wrap 22 may comprise an insulator, or may be surrounded by an insulator.
  • the insulator is configured to retain heat within the heating chamber assembly, improve heating efficiency in the heating chamber assembly, and reduce heat leakage towards other components of an aerosol generation device.
  • the sleeve or wrap 22 may comprise a planar heater (such as a thin-film heater) wrapped around the heating chamber 21.
  • the planar heater may be secured in place by an insulating shell arranged around the heating chamber assembly.
  • the insulating shell may, for example, be a plastic shell comprising, for example, PEEK.
  • a surface heating element may be attached to a part of the outer surface of the side wall of the heating chamber 21.
  • a planar heating element may be attached to a portion of the outer surface that is located between the recesses associated with two rib protrusions on the inner surface.
  • the surface heating element may, for example, be a resistive electrical track printed or adhered onto the outer surface.
  • pairs of arc electrodes 23 may be arranged in each recess on the outer surface corresponding to a rib protrusion, and a surface heating element may be arranged on the outer surface between each pair of adjacent recesses.
  • Figs. 4A and 4B are schematic illustrations of alternative rib recesses on an outer surface of a heating chamber for an aerosol generation device according to the invention.
  • Figs. 4A and 4B illustrate the outer surface of a single rib, in a plane perpendicular to the plane of Figs. 2 and 3, showing how the rib 211 extends along the axis Z of the heating chamber 21.
  • the plane of Figs. 4A and 4B is perpendicular to the arrow f in Fig. 2.
  • Figs. 4A and 4B Comparing Figs. 4A and 4B to Fig. 2, it should be understood that, from the perspective of arrow f, the outer surface of the protrusion extends behind the pair of arc electrodes and behind the spark gap, although for explanatory purposes this is not shown.
  • the first and second electrode 231 , 232 each extend along the axis of the heating chamber 21 , such that heat can be generated along the length of the rib 211.
  • a plurality of pairs of arc electrodes 231, 232 are arranged on either side of the recess on the outside of the rib 211, where each pair forms a respective spark gap across the recess, and the pairs of electrodes 231, 232 are spaced axially along the heating chamber 21.
  • This provision of individual pairs of point-like electrodes may be preferable in order to improve the predictability of arcing paths across the spark gap, and to ensure that the arcing and the associated heat dissipation is spread out along the length of the rib 211.
  • Fig. 5 is a schematic block diagram illustration of an aerosol generation device 2 having a heating chamber 21 and one or more pairs of arc electrodes 23A, 23B according to any of the examples described above.
  • the aerosol generation device 2 of this example is a self-contained portable device having an electrical power supply 25 and a controller 24 for controlling at least the one or more pairs of arc electrodes 23A, 23B.
  • the electrical power supply 25 is configured to supply power for dissipating heat using arcing between the one or more pairs of arc electrodes 23A, 23B.
  • the electrical power supply 25 may be a specialised high voltage power supply suitable for directly applying the breakdown voltage across the one or more pairs of arc electrodes.
  • the electrical power supply 25 or the controller 24 may comprise a step-up transformer to apply the breakdown voltage across the one or more pairs of arc electrodes 23A, 23B.
  • the device 2 may additionally comprise one or more thermistors for determining a temperature of a rib 221 or of the heating chamber 21.
  • the controller 24 may be configured to control the one or more pairs of arc electrodes 23A, 23B in order to heat the interior of the heating chamber according to a predetermined temperature profile.
  • the one or more pairs of arc electrodes 23A, 23B are controlled to heat the interior of the heating chamber 21 to at least 190°C, and more preferably between 230°C and 300°C, for aerosol generation.
  • the one or more pairs of arc electrodes 23A, 23B are preferably controlled to maintain the interior of the heating chamber at at least 190°C, preferably above 200°C, for a predetermined puff sequencing time in which enough aerosol can be generated for a user to inhale a puff of aerosol.
  • the puff sequencing time depends upon the particular aerosol generating substrate, and can be configured by testing the aerosol composition produced with different puff sequencing times, but has been found to be suitably at least four minutes in some cases.
  • the length of time for which the temperature is maintained may additionally or alternatively be based on a predetermined number of puffs of aerosol to be inhaled by a user.
  • Puffs can be detected by, for example, detecting a temperature drop when ambient air is drawn into the heating chamber to replace heated, aerosol-rich air.
  • the controller 24 is independently connected to each of at least two of the pairs of arc electrodes 23A, 23B. This means that the controller can individually activate pairs of arc electrodes 23A, 23B in order vary an amount of heat supplied to the heating chamber 21.
  • the device 2 additionally preferably comprises a lid 26 to keep the heating chamber 21 closed and protected when not in use.
  • the lid 26 may, for example, be a sliding lid constrained by a rail to move between closed and open positions.
  • Fig. 6 is a schematic cross-section of a heating chamber 21 in a specific embodiment of an aerosol generating system.
  • a consumable 1 is also partly illustrated located in a heating position in the heating chamber 21.
  • the second end 213 of the heating chamber 21 is closed, and airflow for drawing aerosol from the consumable is illustrated using arrows F1, F2 and F3.
  • Air enters the heating chamber 21 at the first end 212 where the consumable 1 is spaced away from the side wall of the heating chamber 21.
  • This space is defined by the protrusions 211, which position the consumable 1 within the chamber 21.
  • an additional benefit of the protrusions 211 is that they support an air flow channel for air to be drawn through the consumable 1.
  • the consumable 1 may comprise a space 14 for air to cool, and may comprise a filter 13.
  • the space may advantageously be formed by a hollow paper tube.
  • the filter 13 may advantageously be formed of two segments; one of which may be a hollow filter segment and the other may be a plain filter segment. The segments may be individually wrapped by plug wraps and combined by a common plug wrap to form the filter.
  • the paper tube, filter and rod-shaped portion can be combined by a single or double layer of tipping paper. Ventilation holes may be formed, e.g. by lasering, through the wrapper, preferably through the paper tube and tipping paper in the close vicinity of the filter, for example at 1-2 mm distance.
  • the side wall of the heating chamber 21 comprises a recess on an outer surface corresponding to at least one of the protrusions 211 , and a pair of arc electrodes 23 is located across at least one of the recesses.
  • the consumable 1 may comprise only the rod-shaped portion 11, and the aerosol-carrying air at arrow F3 may be further drawn through a structure of the aerosol generating device 2 to a reusable or semi-disposable mouthpiece of the aerosol generating device 2, separate from the consumable 1.
  • the heating chamber 21 also comprises a platform 215 extending into the internal volume of the heating chamber 21 at the second end 213.
  • the width of the platform is preferably smaller than the width of the consumable.
  • the platform 215 promotes air flow by supporting the consumable 1 at least partly separated from the second end 213, as shown in Fig. 6.
  • the protrusions 211 are arranged to contact the rod-shaped portion 11, and may partly compress the rod-shaped portion 11. Compressing the aerosol generating substrate in the rod-shaped portion 11 has the effect of improving aerosol generation for a given temperature profile.
  • a length L1 of the rod-shaped portion 11 can be compared with a length L2 of the ribs 211 (i.e. a length of the protrusions 211 parallel to a length axis of the rod-shaped portion 11), or an equivalent length L2 of the heating units 22 in the case that the heating units 22 extend directly into the heating chamber.
  • a length L2 of the ribs 211 i.e. a length of the protrusions 211 parallel to a length axis of the rod-shaped portion 11
  • an equivalent length L2 of the heating units 22 in the case that the heating units 22 extend directly into the heating chamber.
  • one end of the ribs 211 is aligned with an end of the rod shaped portion 11 (as represented in transverse dotted line 19), but this need not generally be the case.
  • the length L2 is preferably as least 50%, more preferably between 60% and 70%, of L1 (or of the length of a predetermined section that contains aerosol generating substrate, if this is not the whole length L1 of the rod-shaped portion 11), in order to substantially improve aerosol generation by compressing the aerosol generating substrate.
  • Fig. 7 is a schematic cross-section of a further alternative heating chamber for an aerosol generation device according to the invention.
  • the embodiment of Fig. 7 has a different arrangement of the pair of arc electrodes, in which the spark gap extends into a recess on the outer surface of the one or more walls of the heating chamber, rather than extending across the recess as previously described.
  • This is achieved by arranging the second electrode 232 further into the recess than the first electrode 231.
  • Fig. 7 shows an example where the second electrode 232 is arranged at a bottom of the recess, and the first electrode 231 is arranged at an entrance of the recess.
  • the first electrode 231 comprises two electrically connected parts which face each other across the recess similarly to the first and second electrodes of Fig. 2, but in this case there is no potential difference between the parts of the first electrode 231.
  • a length of the protrusion along the axis Z of the heating chamber may be similar to a length of the protrusion in the plane shown in Fig. 7.
  • the first electrode 231 may be a continuous ring around the entrance of the corresponding recess on the outer surface.
  • Fig. 8 is a schematic cross-section of another alternative heating chamber for an aerosol generation device according to the invention.
  • the embodiment of Fig. 8 differs from the preceding embodiments in that the one or more pairs of arc electrodes 23 are arranged on an inner surface of the one or more walls of the heating chamber 21.
  • a pair of arc electrodes 23 may be arranged in an air flow channel defined by protrusions 211 such that, when a consumable 1 is inserted, the pair of arc electrodes 23 is not in direct contact with the consumable.
  • one or more pairs of arc electrodes may be arranged on any combination of inner and outer surfaces of the walls of the heating chamber 21.
  • the first and second arc electrodes 231, 232 may have a straight shape as shown in Fig. 2 or a curved or bent shape as shown in Fig. 8, such that the shortest gap (and most likely arcing path) between the pair of arc electrodes is between the ends of the arc electrodes and is separated from a surface of the one or more walls of the heating chamber 21.
  • rib protrusions 211 are fixed in position within a heating chamber.
  • the rib protrusions 211 may be configured to move when a consumable 1 is positioned within the heating chamber 21.
  • This may be used to achieve greater compression of the consumable 1 than can be achieved by manual insertion of a consumable 1 between the rib protrusions which are provided as extensions 211 of the heating chamber 21.
  • movement of the rib protrusions 211 may be controlled using a mechanism as described in EP 20200899.1.

Landscapes

  • Resistance Heating (AREA)

Abstract

L'invention concerne une chambre de chauffage pour un dispositif de génération d'aérosol, la chambre de chauffage comprenant une ou plusieurs parois conçues pour recevoir un substrat d'aérosol, la chambre de chauffage comprenant en outre : une paire d'électrodes d'arc disposées sur ladite paroi pour former un éclateur. Un dispositif de génération d'aérosol comprenant : une chambre de chauffage comprenant une ou plusieurs parois conçues pour recevoir un substrat d'aérosol, et une paire d'électrodes d'arc disposées sur ladite paroi pour former un éclateur ; et une source d'alimentation connectée à la paire d'électrodes d'arc et conçue pour appliquer une tension entre la paire d'électrodes d'arc qui est supérieure à une tension de claquage prédéterminée de l'éclateur, afin de fournir de la chaleur à la chambre de chauffage.
EP22744748.9A 2021-07-14 2022-07-14 Chambre de chauffage pour dispositif de génération d'aérosol Pending EP4369958A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21185481 2021-07-14
PCT/EP2022/069764 WO2023285605A1 (fr) 2021-07-14 2022-07-14 Chambre de chauffage pour dispositif de génération d'aérosol

Publications (1)

Publication Number Publication Date
EP4369958A1 true EP4369958A1 (fr) 2024-05-22

Family

ID=76920648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22744748.9A Pending EP4369958A1 (fr) 2021-07-14 2022-07-14 Chambre de chauffage pour dispositif de génération d'aérosol

Country Status (2)

Country Link
EP (1) EP4369958A1 (fr)
WO (1) WO2023285605A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108371346B (zh) * 2018-02-08 2024-02-20 深圳维昔技术有限公司 一种用于吸食香烟的装置及方法
WO2019218311A1 (fr) * 2018-05-17 2019-11-21 Fontem Holdings 1 B.V. Dispositifs à fumer à allumage par arc électrique
EP3636084B1 (fr) * 2018-10-12 2021-12-01 JT International S.A. Dispositif de génération d'aérosols et chambre de chauffage correspondant

Also Published As

Publication number Publication date
WO2023285605A1 (fr) 2023-01-19

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