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WO2024243722A1 - Système de chauffage - Google Patents

Système de chauffage Download PDF

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Publication number
WO2024243722A1
WO2024243722A1 PCT/CN2023/096466 CN2023096466W WO2024243722A1 WO 2024243722 A1 WO2024243722 A1 WO 2024243722A1 CN 2023096466 W CN2023096466 W CN 2023096466W WO 2024243722 A1 WO2024243722 A1 WO 2024243722A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating system
temperature
heating
aerosol generating
aerosol
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
PCT/CN2023/096466
Other languages
English (en)
Inventor
Lik Hon
Zhuoran LI
Fucheng YU
David Thomas
Robert Wallace
Phillip Taylor
Jan HYLA
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.)
Fontem Beijing Technology Solutions Ltd
IMPERIAL TOBACCO Ltd
Imperial Tobacco Group Ltd
Original Assignee
Fontem Beijing Technology Solutions Ltd
IMPERIAL TOBACCO Ltd
Imperial Tobacco Ltd Great Britain
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 Fontem Beijing Technology Solutions Ltd, IMPERIAL TOBACCO Ltd, Imperial Tobacco Ltd Great Britain filed Critical Fontem Beijing Technology Solutions Ltd
Priority to PCT/CN2023/096466 priority Critical patent/WO2024243722A1/fr
Publication of WO2024243722A1 publication Critical patent/WO2024243722A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/04—Waterproof or air-tight seals for heaters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • 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
    • A24F40/50—Control or monitoring
    • A24F40/57—Temperature control
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/16—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base

Definitions

  • the present disclosure relates to a heating system for an aerosol generating apparatus.
  • a typical aerosol generating apparatus may comprise a power supply, an aerosol generating unit that is driven by the power supply, an aerosol precursor, which in use is aerosolised by the aerosol generating unit to generate an aerosol, and a delivery system for delivery of the aerosol to a user.
  • a drawback with known aerosol generating apparatuses is controlling or regulating a temperature of a heater element of the aerosol generating unit, for example to avoid or reduce overheating of a heater element.
  • the present disclosure provides a heating system for an aerosol generating apparatus, the heating system comprising a wick; and a heating element deposited on a surface of the wick and comprising a coating on the surface of the wick, wherein the coating comprises a positive temperature coefficient (PTC) material.
  • PTC positive temperature coefficient
  • a PTC material is a material with a positive temperature coefficient of resistivity. In other words, it is a material that shows an increase in resistivity when the temperature of the material increases.
  • a PTC material can be configured such that its electrical resistivity rises sharply or undergoes a step change above a temperature, termed a transition temperature.
  • a PTC material When used in an electrical pathway of a heater, a PTC material can therefore enable the heater to be self-regulating. This is because as the temperature of the heater increases, the resistance of the heater also increases. This then reduces current flow through the electrical pathway, reducing or preventing further heating.
  • the heater can therefore be configured to maintain a constant temperature corresponding to the transition temperature without requiring a thermostat or other control means to control the temperature of the heater.
  • Providing a heating system wherein the heating element is formed as a coating on a wick and comprises a PTC material may enable an advantageous implementation of a heating system.
  • providing the heating element as a coating comprising a PTC material may provide increased ease of manufacture for the heating system, and may enable improved temperature matching between the heating element and the wick for improved temperature control over the heating system. In other words, an offset or deviation between a temperature of the wick and a temperature of the heating system and the PTC material may be reduced.
  • the wick may be formed of a porous ceramic.
  • the heating element may be deposited on the surface of the wick via a printing process. This provides a further increase in ease of manufacturability, by enabling simple deposition of the coatings with high levels of control and precision.
  • the coating may comprise a PTC material powder.
  • a powder represents a particular form of a PTC material which may be deposited or coated onto a surface of a wick.
  • the PTC material may be a ceramic.
  • the PTC material may be barium titanate (BaTiO 3 ) . Ceramics and materials such as BaTiO 3 have or can be configured to have material parameters such as a transition temperature that is well suited to a heater for use in an aerosol generating apparatus.
  • the PTC material may be present in the coating at a concentration of 40–60%.
  • the coating may further comprise, for example, electrically conductive material such as a carbon or a metal powder. Other materials or components of the coating may also be present.
  • the content of the PTC material within the coating may provide the desired resistance characteristics for the coating to enable control over the temperature of the heating system via the PTC content of the coating.
  • the heating system may comprise a wick formed of a porous ceramic and a heating element deposited on a surface of the wick and comprising a coating, wherein the coating comprises a positive temperature coefficient, PTC, material.
  • an aerosol generating apparatus comprising a heating system of the first aspect.
  • the apparatus may be operable to supply a substantially constant voltage to the heating system.
  • Supplying a constant voltage to the heating system may enable the PTC material in the coating to control the current passing through the heating system and hence the heating temperature of the heating system, since current (I) is inversely proportional to resistance (R) in this arrangement. Therefore, temperature dependent variations in the resistance of the PTC material of the heating element will cause the current flowing through an electrical pathway of the heating element to correspondingly increase or decrease.
  • the PTC material may be configured to limit a heating temperature of the heating element.
  • the PTC material may be configured to vary an electrical resistance of the heating element according to a temperature of the heating element to thereby limit a heating temperature of the heating element. An increase in the electrical resistance of the heating element according to the temperature of the heating element (and in particular the PTC material in the heating element) will reduce a supplied current to slow or stop further heating beyond a set temperature.
  • the PTC material may be configured to limit a heating temperature of the heating element to a limit temperature, the limit temperature being below or less than 350°C.
  • the limit temperature may be below or less than 300°C.
  • a limit temperature in this range may be particularly suited for operation of an aerosol generating apparatus. It may be a temperature that is suited for operating the heating system to produce an aerosol from an aerosol precursor. Alternatively, it may be a safe temperature that the heating system may operate at without damaging the heating system. An operating temperature of a heating system of an aerosol generating apparatus may increase if the heating system is operated with a reduced or zero level of aerosol precursor, and the limit temperature may therefore reduce or prevent damage to the heater that might otherwise occur if the heating system were operated with a reduced or zero level of aerosol precursor.
  • the apparatus may be operable to supply a substantially constant voltage to the heating system for a duration of a heating cycle, which may be a predetermined time period.
  • a substantially constant voltage may be supplied to the heating system for the duration of a user input such as a button press, or for the duration of a detected condition such as a user inhalation as determined via a puff sensor.
  • the heating system may be heated to the limit temperature and may maintain a substantially constant temperature of the limit temperature for the remainder of the heating cycle.
  • the present disclosure may provide a method of operating a heating system according to the first aspect, wherein the PTC material is configured to vary an electrical resistance of the heating element according to the temperature of the heating element to thereby limit a heating temperature of the heating element to a limit temperature.
  • the method comprises the step of supplying a substantially constant voltage to the heating system for a predetermined time period such that the heating system is heated to the limit temperature and maintains a substantially constant temperature of the limit temperature.
  • the present disclosure may provide a use of a heating system of the first aspect to produce an aerosol from an aerosol precursor.
  • Fig. 1 is a block system diagram showing an example aerosol generating apparatus.
  • Figs. 3a and 3b are schematic diagrams showing an example implementation of the apparatus of Fig. 2.
  • Fig. 4 is a schematic diagram showing an example implementation of a heating system.
  • Fig. 5 is a schematic diagram showing an example implementation of a consumable comprising a heating system.
  • the words “comprising, “having, ” “including, ” or “containing” are inclusive or open-ended and do not exclude additional, unrecited elements or method steps.
  • an "aerosol generating apparatus” may be an apparatus configured to deliver an aerosol to a user for inhalation by the user.
  • the apparatus may additionally/alternatively be referred to as a “smoking substitute apparatus” , if it is intended to be used instead of a conventional combustible smoking article.
  • a combustible “smoking article” may refer to a cigarette, cigar, pipe or other article, that produces smoke (an aerosol comprising solid particulates and gas) via heating above the thermal decomposition temperature (typically by combustion and/or pyrolysis) .
  • An aerosol generated by the apparatus may comprise an aerosol with particle sizes of 0.2 -7 microns, or less than 10 microns, or less than 7 microns. This particle size may be achieved by control of one or more of: heater temperature; cooling rate as the vapour condenses to an aerosol; flow properties including turbulence and velocity.
  • the generation of aerosol by the aerosol generating apparatus may be controlled by an input device.
  • the input device may be configured to be user-activated, and may for example include or take the form of an actuator (e.g. actuation button) and/or an airflow sensor.
  • the aerosol generating apparatus may be portable.
  • the term "portable” may refer to the apparatus being for use when held by a user.
  • an "aerosol generating system” may be a system that includes an aerosol generating apparatus and optionally other circuitry/components associated with the function of the apparatus, e.g. one or more external devices and/or one or more external components (here “external” is intended to mean external to the aerosol generating apparatus) .
  • an “external device” and “external component” may include one or more of a: a charging device, a mobile device (which may be connected to the aerosol generating apparatus, e.g. via a wireless or wired connection) ; a networked-based computer (e.g. a remote server) ; a cloud-based computer; any other server system.
  • An example aerosol generating system may be a system for managing an aerosol generating apparatus.
  • Such a system may include, for example, a mobile device, a network server, as well as the aerosol generating apparatus.
  • an "aerosol” may include a suspension of precursor, including as one or more of: solid particles; liquid droplets; gas. Said suspension may be in a gas including air.
  • An aerosol herein may generally refer to/include a vapour.
  • An aerosol may include one or more components of the precursor.
  • a “precursor” may include one or more of a: liquid; solid; gel; loose leaf material; other substance.
  • the precursor may be processed by an aerosol generating unit of an aerosol generating apparatus to generate an aerosol.
  • the precursor may include one or more of: an active component; a carrier; a flavouring.
  • the active component may include one or more of nicotine; caffeine; a cannabidiol oil; a non-pharmaceutical formulation, e.g. a formulation which is not for treatment of a disease or physiological malfunction of the human body.
  • the active component may be carried by the carrier, which may be a liquid, including propylene glycol and/or glycerine.
  • flavouring may refer to a component that provides a taste and/or a smell to the user.
  • the flavouring may include one or more of: Ethylvanillin (vanilla) ; menthol, Isoamyl acetate (banana oil) ; or other.
  • the precursor may include a substrate, e.g. reconstituted tobacco to carry one or more of the active component; a carrier; a flavouring.
  • a "storage portion” may be a portion of the apparatus adapted to store the precursor. It may be implemented as fluid-holding reservoir or carrier for solid material depending on the implementation of the precursor as defined above.
  • a "flow path" may refer to a path or enclosed passageway through an aerosol generating apparatus, e.g. for delivery of an aerosol to a user.
  • the flow path may be arranged to receive aerosol from an aerosol generating unit.
  • upstream and downstream may be defined in respect of a direction of flow in the flow path, e.g. with an outlet being downstream of an inlet.
  • a "delivery system” may be a system operative to deliver an aerosol to a user.
  • the delivery system may include a mouthpiece and a flow path.
  • a "flow" may refer to a flow in a flow path.
  • a flow may include aerosol generated from the precursor.
  • the flow may include air, which may be induced into the flow path via a puff by a user.
  • a “puff” (or “inhale” or “draw” ) by a user may refer to expansion of lungs and/or oral cavity of a user to create a pressure reduction that induces flow through the flow path.
  • an "aerosol generating unit” may refer to a device configured to generate an aerosol from a precursor.
  • the aerosol generating unit may include a unit to generate a vapour directly from the precursor (e.g. a heating system or other system) or an aerosol directly from the precursor (e.g. an atomiser including an ultrasonic system, a flow expansion system operative to carry droplets of the precursor in the flow without using electrical energy or other system) .
  • a plurality of aerosol generating units to generate a plurality of aerosols may be present in an aerosol generating apparatus.
  • a “heating system” may refer to an arrangement of at least one heating element, which is operable to aerosolise a precursor once heated.
  • the at least one heating element may be electrically resistive to produce heat from the flow of electrical current therethrough.
  • the at least one heating element may be arranged as a susceptor to produce heat when penetrated by an alternating magnetic field.
  • the heating system may be configured to heat a precursor to below 300 or 350 degrees C, including without combustion.
  • a "consumable” may refer to a unit that includes a precursor.
  • the consumable may include an aerosol generating unit, e.g. it may be arranged as a cartomizer.
  • the consumable may include a mouthpiece.
  • the consumable may include an information carrying medium.
  • liquid or gel implementations of the precursor e.g. an e-liquid
  • the consumable may be referred to as a “capsule” or a “pod” or an “e-liquid consumable” .
  • the capsule/pod may include a storage portion, e.g. a reservoir or tank, for storage of the precursor.
  • solid material implementations of the precursor e.g.
  • the consumable may be referred to as a “stick” or “package” or “heat-not-burn consumable” .
  • the mouthpiece may be implemented as a filter and the consumable may be arranged to carry the precursor.
  • the consumable may be implemented as a dosage or pre-portioned amount of material, including a loose-leaf product.
  • an "information carrying medium” may include one or more arrangements for storage of information on any suitable medium. Examples include: a computer readable medium; a Radio Frequency Identification (RFID) transponder; codes encoding information, such as optical (e.g. a bar code or QR code) or mechanically read codes (e.g. a configuration of the absence or presents of cut-outs to encode a bit, through which pins or a reader may be inserted) .
  • RFID Radio Frequency Identification
  • heat-not-burn may refer to the heating of a precursor, typically tobacco, without combustion, or without substantial combustion (i.e. localised combustion may be experienced of limited portions of the precursor, including of less than 5%of the total volume) .
  • an example aerosol generating apparatus 1 includes a power supply 2, for supply of electrical energy.
  • the apparatus 1 includes an aerosol generating unit 4 that is driven by the power supply 2.
  • the power supply 2 may include an electric power supply in the form of a battery and/or an electrical connection to an external power source.
  • the apparatus 1 includes a precursor 6, which in use is aerosolised by the aerosol generating unit 4 to generate an aerosol.
  • the apparatus 2 includes a delivery system 8 for delivery of the aerosol to a user.
  • Electrical circuitry (not shown in figure 1) may be implemented to control the interoperability of the power supply 4 and aerosol generating unit 6.
  • the power supply 2 may be omitted since, e.g. an aerosol generating unit implemented as an atomiser with flow expansion may not require a power supply.
  • Fig. 2 shows an implementation of the apparatus 1 of Fig. 1, where the aerosol generating apparatus 1 is configured to generate aerosol from a liquid precursor.
  • the apparatus 1 includes a device body 10 and a consumable 30.
  • the body 10 includes the power supply 4.
  • the body may additionally include any one or more of electrical circuitry 12, a memory 14, a wireless interface 16, one or more other components 18.
  • the electrical circuitry 12 may include a processing resource for controlling one or more operations of the body 10 and consumable 30, e.g. based on instructions stored in the memory 14.
  • the wireless interface 16 may be configured to communicate wirelessly with an external (e.g. mobile) device, e.g. via Bluetooth.
  • an external (e.g. mobile) device e.g. via Bluetooth.
  • the consumable 30 includes a storage portion implemented here as a tank 32 which stores the liquid precursor 6 (e.g. e-liquid) .
  • the consumable 30 also includes a heating system 34, one or more air inlets 36, and a mouthpiece 38.
  • the consumable 30 may include one or more other components 40.
  • the body 10 and consumable 30 may each include a respective electrical interface (not shown) to provide an electrical connection between one or more components of the body 10 with one or more components of the consumable 30. In this way, electrical power can be supplied to components (e.g. the heating system 34) of the consumable 30, without the consumable 30 needing to have its own power supply.
  • a respective electrical interface not shown
  • a user may activate the aerosol generating apparatus 1 when inhaling through the mouthpiece 38, i.e. when performing a puff.
  • the puff performed by the user, may initiate a flow through a flow path in the consumable 30 which extends from the air inlet (s) 34 to the mouthpiece 38 via a region in proximity to the heating system 34.
  • Activation of the aerosol generating apparatus 1 may be initiated, for example, by an airflow sensor in the body 10 which detects airflow in the aerosol generating apparatus 1 (e.g. caused by a user inhaling through the mouthpiece) , or by actuation of an actuator included in the body 10.
  • the electrical circuitry 12 e.g. under control of the processing resource
  • the heating system 34 may cause the heating system 32 to heat liquid precursor 6 drawn from the tank to produce an aerosol which is carried by the flow out of the mouthpiece 38.
  • the heating system 34 may include a heating filament or element, heating element or heater and a wick, wherein a first portion of the wick extends into the tank 32 in order to draw liquid precursor 6 out from the tank 32, wherein the heating element coils around a second portion of the wick located outside the tank 32.
  • the heating element may be configured to heat up liquid precursor 6 drawn out of the tank 32 by the wick to produce the aerosol.
  • the aerosol generating unit 4 is provided by the above-described heating system 34 and the delivery system 8 is provided by the above-described flow path and mouthpiece 38.
  • any one or more of the precursor 6, heating system 34, air inlet (s) 36 and mouthpiece 38, may be included in the body 10.
  • the mouthpiece 36 may be included in the body 10 with the precursor 6 and heating system 32 arranged as a separable cartomizer.
  • the body 10 and the consumable 30 are configured to be physically coupled together by pushing the consumable 30 into an aperture in a top end 11 the body 10, with the consumable 30 being retained in the aperture via an interference fit.
  • the body 10 and the consumable 30 could be physically coupled together in other ways, e.g. by screwing one onto the other, through a bayonet fitting, or through a snap engagement mechanism, for example.
  • the body 10 also includes a charging port (not shown) at a bottom end 13 of the body 10.
  • the body 10 also includes a user interface device configured to convey information to a user.
  • the user interface device is implemented as a light 15, which may e.g. be configured to illuminate when the apparatus 1 is activated.
  • Other user interface devices are possible, e.g. to convey information haptically or audibly to a user.
  • the consumable 30 has an opaque cap 31, a translucent tank 32 and a translucent window 33.
  • the consumable 30 is physically coupled to the body 10 as shown in Fig. 3a, only the cap 31 and window 33 can be seen, with the tank 32 being obscured from view by the body 10.
  • the body 10 includes a slot 15 to accommodate the window 33.
  • the window 33 is configured to allow the amount of liquid precursor 6 in the tank 32 to be visually assessed, even when the consumable 30 is physically coupled to the body 10.
  • a heating system 34 which may be used in an aerosol generating apparatus of any of the preceding examples, comprises a wick 342 and a heating element 341 deposited on a surface of the wick.
  • the heating element 341 includes a coating on the surface of the wick 342.
  • the coating includes a PTC material.
  • the heating element 341 further includes connection pins 343 for connecting the heating element to a source of electrical energy.
  • the connection of the heating element 341 may be configured differently.
  • connection pins 343 may be, for example, insulating rods coating with a conductive coating such as a coating including a PTC material, or may be conductive rods.
  • the coating may be deposited on the wick using a coating formulation which can be coated onto the wick.
  • the PTC material may be present in the coating formulation in the form of a powder, and may be present at a concentration of 40–60%by volume. Examples of PTC materials include BaTiO 3 in addition to various ceramic materials.
  • the heating element, including the coating may be deposited on the wick 342 by using the coating formulation in a coating process such as dip coating or spray coating, or in a printing process such as screen printing.
  • Fig. 5 illustrates a consumable 30 including a heating system 34 as illustrated in Fig. 4.
  • the consumable 30 may be engageable with a body 10 to form an aerosol generating apparatus 1.
  • the apparatus 1 may comprise electrical circuitry 12 such as a control unit to control operation of the heating system 34.
  • the electrical circuitry 12 may be provided in the body 10.
  • the electrical circuitry 12 of the apparatus 1 may be operable to supply a substantially constant voltage to the heating system 34. This may be for a predetermined time period following an activation of the apparatus 1, or may be in response to a continuing user input such as a button press or a detected user inhalation.
  • the PTC material While the heating system 34 is operating, the PTC material may be configured to limit a heating temperature of the heating element.
  • the PTC material forms part of an electrical pathway through the heating system from the power supply, and variations in the resistance of the PTC material according to the temperature of the heating system may thereby affect the current that is able to flow through the heating element 341 of the heating system 34.
  • the resistance When the temperature increases, the resistance also increases, providing a self-limiting heating system 34 wherein the heating temperature is limited by the resistance profile of the PTC material.
  • the heating system 34 may thus be configured to self-limit or self-regulate a heating temperature of the heating system 34 to a temperature of less than 350°C, or less than 300°C. This can either provide a suitable temperature for aerosol generation, or can act as, in effect, a safety net should the heating system 34 be operating outside normal operating parameters. For example, this may limit overheating of the heating system 34 in a situation wherein a supply of aerosol precursor 6 to the wick 342 of the heating system 34 is reduced or depleted.
  • Fig. 6 illustrates a further example operating sequence or operating method which may be implemented to operate a heating system 34 of the previous examples, for example by an aerosol generating apparatus 1.
  • the method comprises the step S102 of supplying a substantially constant voltage to the heating system such that the heating system is heated to the limit temperature and maintains a substantially constant temperature of the limit temperature.
  • the method may further include detection or receipt of an activation signal (step S100) to initiate the heating cycle.
  • the method may further include detection or receipt of a deactivation signal (step S104) to halt or end the heating cycle (step S106) .
  • the deactivation signal may be based on a user input, on a time period having passed, on a set amount of charge having been supplied to the heating system 34, or on a set period at which the resistance of the heating element 341 has been higher than a threshold value. Such a method may be implemented when using the heating system 34 to produce an aerosol from an aerosol precursor.

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  • Resistance Heating (AREA)

Abstract

L'invention concerne un système de chauffage 34 pour un appareil de génération d'aérosol. Le système de chauffage 34 comprend une mèche 342 et un élément chauffant 341 déposé sur une surface de la mèche 342 et comprenant un revêtement sur la surface de la mèche 342. Le revêtement comprend un matériau à coefficient de température positif (PTC). L'invention concerne également un appareil de génération d'aérosol comprenant le système de chauffage, et un procédé de fonctionnement de l'appareil de génération d'aérosol.
PCT/CN2023/096466 2023-05-26 2023-05-26 Système de chauffage Pending WO2024243722A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/096466 WO2024243722A1 (fr) 2023-05-26 2023-05-26 Système de chauffage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/096466 WO2024243722A1 (fr) 2023-05-26 2023-05-26 Système de chauffage

Publications (1)

Publication Number Publication Date
WO2024243722A1 true WO2024243722A1 (fr) 2024-12-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/096466 Pending WO2024243722A1 (fr) 2023-05-26 2023-05-26 Système de chauffage

Country Status (1)

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WO (1) WO2024243722A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170127725A1 (en) * 2014-06-27 2017-05-11 Batmark Limited Vaporizer assembly
US20200154787A1 (en) * 2018-11-19 2020-05-21 Rai Strategic Holdings, Inc. Temperature control in an aerosol delivery device
EP3970531A1 (fr) * 2019-05-16 2022-03-23 Xiamen Fengtao Ceramics Co., Ltd Dispositif de chauffage de cigarette électronique sans contact
US20220370736A1 (en) * 2018-09-12 2022-11-24 Juul Labs, Inc. Vaporizer Including Positive Temperature Coefficient of Resistivity (PTCR) Heating Element
US20230069561A1 (en) * 2019-12-20 2023-03-02 Philip Morris Products S.A. Heater for aerosol-forming substrate comprising a positive temperature coefficient thermistor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170127725A1 (en) * 2014-06-27 2017-05-11 Batmark Limited Vaporizer assembly
US20220370736A1 (en) * 2018-09-12 2022-11-24 Juul Labs, Inc. Vaporizer Including Positive Temperature Coefficient of Resistivity (PTCR) Heating Element
US20200154787A1 (en) * 2018-11-19 2020-05-21 Rai Strategic Holdings, Inc. Temperature control in an aerosol delivery device
EP3970531A1 (fr) * 2019-05-16 2022-03-23 Xiamen Fengtao Ceramics Co., Ltd Dispositif de chauffage de cigarette électronique sans contact
US20230069561A1 (en) * 2019-12-20 2023-03-02 Philip Morris Products S.A. Heater for aerosol-forming substrate comprising a positive temperature coefficient thermistor

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