EP4322778B1 - Induktiv gekoppelter heizkörper - Google Patents

Induktiv gekoppelter heizkörper

Info

Publication number
EP4322778B1
EP4322778B1 EP22721063.0A EP22721063A EP4322778B1 EP 4322778 B1 EP4322778 B1 EP 4322778B1 EP 22721063 A EP22721063 A EP 22721063A EP 4322778 B1 EP4322778 B1 EP 4322778B1
Authority
EP
European Patent Office
Prior art keywords
aerosol
generating device
secondary coil
primary coil
coil
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.)
Active
Application number
EP22721063.0A
Other languages
English (en)
French (fr)
Other versions
EP4322778C0 (de
EP4322778A1 (de
Inventor
Angelo D'ONOFRIO
Benjamin Luke MAZUR
Archer Guy Clift ROWBERRY
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.)
Philip Morris Products SA
Original Assignee
Philip Morris Products 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 Philip Morris Products SA filed Critical Philip Morris Products SA
Publication of EP4322778A1 publication Critical patent/EP4322778A1/de
Application granted granted Critical
Publication of EP4322778C0 publication Critical patent/EP4322778C0/de
Publication of EP4322778B1 publication Critical patent/EP4322778B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • A24F40/465—Shape or structure of electric heating means specially adapted for induction heating
    • 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
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F7/00—Mouthpieces for pipes; Mouthpieces for cigar or cigarette holders

Definitions

  • the present disclosure relates to an aerosol-generating device.
  • the present disclosure further relates to an aerosol-generating system comprising an aerosol-generating device and an aerosol-generating article.
  • the present disclosure further relates to a method for forming an aerosol in an aerosol-generating device.
  • an aerosol-generating device for generating an inhalable vapor.
  • Such devices may heat an aerosol-forming substrate contained in an aerosol-generating article without burning the aerosol-forming substrate.
  • the aerosol-generating article may have a shape suitable for insertion of the aerosol-generating article into a heating chamber of the aerosol-generating device.
  • the aerosol-generating article may have a rod shape.
  • a heating element may be arranged in or around the heating chamber for heating the aerosol-forming substrate once the aerosol-generating article is inserted into the heating chamber of the aerosol-generating device.
  • Electric connectors may be provided to electrically connect a power source within one sub-unit to an electric consumer in another sub-unit in the assembled state.
  • Electric connectors often comprise sensible connecting surfaces, for example metallic surfaces, which are brought into intimate physical contact to establish the electric connection. Processes like surface oxidation, or deposition of liquids or solid particulates, may lead to a reduction in conductance of the metallic surface. This may adversely affect the electric connection.
  • Electric connectors often comprise material transitions between conducting and nonconducting materials, for example a metallic surface adjacent to a plastic surface.
  • Material transitions may be accompanied by gaps or surface corrugations.
  • Moisture may inadvertently enter an interior of the device through a gap.
  • Particulate matter may inadvertently adhere at surface corrugations.
  • Electric connectors often require a precise alignment of opposing conducting surfaces of the parts to be connected.
  • US 2018/289071 A1 relates to a cartomizer of an electronic vaping device including a heater circuit which is located adjacent an air passage thereof.
  • the heater circuit includes an electrically resistive heater in electrical communication with a secondary coil.
  • a wick extends across the air passage. The wick is configured to draw pre-vapor formulation from a reservoir toward the heater.
  • the heater is configured to heat the pre-vapor formulation to a temperature sufficient to vaporize the pre-vapor formulation and form a vapor.
  • the cartomizer is connectable to a power supply component which includes a power source in electrical communication with a primary coil.
  • the power supply component is configured to induce sufficient voltage in the secondary coil of the heater circuit such that the secondary coil is configured to heat the heater and vaporize the pre-vapor formulation when the primary coil is powered by the power source.
  • WO2018/112766 A1 discloses an electronic cigarette comprising an electric heating device for heating tobacco.
  • a modular aerosol-generating device with durable electric connectors. It would be desirable to provide a modular aerosol-generating device with a stably functioning electric connection between sub-units. It would be desirable to provide a modular aerosol-generating device which allows attaching and detaching of sub-units in an easy-to-operate manner. It would be desirable to provide a modular aerosol-generating device which is easy to clean.
  • an aerosol-generating device as defined in claim 1.
  • a modular aerosol-generating device with durable electric connectors may be provided.
  • the modular aerosol-generating device may allow a stably functioning electric connection between sub-units.
  • the primary coil may be embedded within a plastic housing of the main body and the secondary coil may be embedded within a plastic housing of the mouthpiece such that no open metallic connector sides are required.
  • the modular aerosol-generating device may be easy to clean.
  • the inductive coupling of the modular aerosol-generating device may allow attaching and detaching of sub-units in an easy-to-operate manner. For example, it may not be necessary to precisely align respective metallic electric connectors of the main body and the mouthpiece.
  • Electric power may be inductively transferred from the primary coil to the secondary coil.
  • the primary coil may be an active coil and the secondary coil may be a passive coil of the inductive system.
  • the power transfer by inductive coupling is based on the physical principle of mutual inductance.
  • the system of an active helical coil and a passive helical coil could be considered as effectively two air-cored solenoids.
  • the magnetic flux induced in the active coil will induce an equal and opposite electromotive force (emf)' ' ⁇ ' in the passive coil.
  • ⁇ active B ⁇ A '.
  • ⁇ active B ⁇ R active 2
  • Exemplary dimensions of the two coils are a radius ' R ' of a turn of 5 millimeters of the active coil, a radius of a turn of 4 millimeters of the passive coil arranged coaxially within the active coil, 15 windings ' N ' for each coil, and a length ' I ' of 10 millimeters of both coils.
  • ⁇ ⁇ 1.89 ⁇ 10 ⁇ 6 Nm A 2 dI active dt
  • a parallel compensatory inductor ' L comp ' were to be introduced across the load, it could be calibrated to cancel the effects of the leakage inductance. Adding a 200 nanohenry inductor, the efficiency in the passive side of the coil at the 4 watts operating point is about 96%.
  • the system frequency does need to be higher in order to reach the same transferred power, with the simple circuit operating at 20 kHz and the compensated circuit at 57 kHz. It may thus be desirable to construct the device with a compensatory inductor on 200 nanohenry and operate it at a 57 kHz frequency.
  • the primary coil may be in wired connection to the power supply.
  • the secondary coil may be in wired connection to the resistive heating element.
  • the primary coil and the power supply may form part of a primary wired circuit housed within the main body.
  • the secondary coil and the resistive heating element may form part of a secondary wired circuit housed within the mouthpiece. Electric power may be inductively transferred from the primary wired circuit to the secondary wired circuit.
  • only the main body comprises a power supply.
  • the mouthpiece does not comprise a power supply.
  • the sole electric connection between the main body and the mouthpiece is established via the inductive coupling of the primary coil and the secondary coil.
  • the aerosol-generating device may be configured such that electric power transferred from the primary coil to the secondary coil via inductive coupling is used to heat the resistive heating element.
  • the aerosol-generating device may be configured such that the electric power used for heating the resistive heating element is supplied from the secondary coil to the resistive heating element by a wired connection.
  • the aerosol-generating device comprises a power supply configured to supply power to the heating element.
  • the power supply preferably comprises a power source.
  • the power source is a battery, such as a lithium ion battery.
  • the power source may be another form of charge storage device such as a capacitor.
  • the power source may require recharging.
  • the power source may have sufficient capacity to allow for the continuous generation of aerosol for a period of around six minutes or for a period that is a multiple of six minutes.
  • the power source may have sufficient capacity to allow for a predetermined number of puffs or discrete activations of the heater assembly.
  • the power supply may comprise control electronics.
  • the control electronics may comprise a microcontroller.
  • the microcontroller is preferably a programmable microcontroller.
  • the electric circuitry may comprise further electronic components.
  • the electric circuitry may be configured to regulate a supply of power to the primary coil. Power may be supplied to the primary coil continuously following activation of the system or may be supplied intermittently, such as on a puff-by-puff basis. The power may be supplied to the primary coil in the form of pulses of electric current.
  • the aerosol-generating device may be configured to supply an alternating current (AC) to the primary coil.
  • AC alternating current
  • the control electronics may comprise a DC/AC converter to convert direct current (DC) provided by the power source into AC to be supplied to the primary coil.
  • the control electronics may comprise a DC/AC converter comprising two transistors in a half-bridge configuration.
  • the control electronics may comprise a DC/AC converter comprising a full bridge configuration with 4 transistors operating in pairs.
  • a full bridge configuration may advantageously allow for stronger amplification of the power from the power supply going into the DC/AC converter. This may allow using a smaller battery with a lower voltage.
  • the DC/AC converter may comprise a LC filter.
  • the aerosol-generating may comprise one or both of a half-bridge driver and a half-bridge.
  • the aerosol-generating may comprise a LC filter.
  • the aerosol-generating may comprise a half-bridge driver and a half-bridge and a LC filter.
  • the aerosol-generating device may be configured to induce an alternating current in the secondary coil.
  • the aerosol-generating device may be configured to supply AC induced in the secondary coil to the resistive heating element.
  • the mouthpiece may comprise a rectifier.
  • the mouthpiece may comprise a rectifier arranged in electric connection between the secondary coil and the resistive heating element to supply direct current to the resistive heating element.
  • the rectifier may be connected in series between the secondary coil and the resistive heating element.
  • the primary coil and the secondary coil may be made of the same material.
  • the primary coil and the secondary coil may be made of different materials. Suitable materials for one or both the primary coil and the secondary coil may be those metals and alloys commonly known to the skilled person to be used for inductor coils. Exemplary materials are copper or steel.
  • the thickness of the coiled wire of the primary coil and the secondary coil may be the same or may be different.
  • the thickness of the coiled wire may be between 0.05 millimeter and 3 millimeters, preferably between 0.1 millimeter and 1 millimeter.
  • the primary coil and the secondary coil may be helical coils.
  • One or both of the primary coil and the secondary coil may have a plurality of windings.
  • Either one of the primary coil and the secondary coil may have between 5 and 25 windings, preferably between 10 and 20 windings, more preferably between 13 and 17 windings, most preferably 15 windings.
  • the primary coil and the secondary coil may have a different number of windings. In some embodiments, the number of windings of the primary coil differs from the number of windings of the secondary coil by less than 5 windings, or by less than 4 windings, or by less than 3 windings, or by less than 2 windings.
  • the primary coil and the secondary coil may have the same number of windings.
  • the primary coil and the secondary coil may have the same number of windings and may have between 5 and 25 windings, preferably between 10 and 20 windings, more preferably between 13 and 17 windings, most preferably 15 windings.
  • Either one of the primary coil and the secondary coil may have a length in a direction perpendicular to the diameter of a winding of between 1 and 30 millimeters, preferably between 5 and 20 millimeters, more preferably between 8 and 12 millimeters, most preferably about 10 millimeters.
  • the primary coil and the secondary coil may have different lengths.
  • the primary coil and the secondary coil may have the same lengths in a direction perpendicular to the diameter of a winding.
  • the primary coil and the secondary coil may have the same length in a direction perpendicular to the diameter of a winding and the length may be between 1 and 30 millimeters, preferably between 5 and 20 millimeters, more preferably between 8 and 12 millimeters, most preferably about 10 millimeters.
  • Either one of the primary coil and the secondary coil may have a diameter of a winding of between 1 and 30 millimeters, preferably between 5 and 15 millimeters, more preferably between 8 and 10 millimeters.
  • the primary coil and the secondary coil may have different diameters of a winding.
  • the primary coil may be arranged coaxially around the secondary coil when the mouthpiece is connected to the main body and the diameter of a winding of the primary coil may be about 10 millimeters and the diameter of a winding of the secondary coil may be about 8 millimeters.
  • the primary coil is arranged coaxially around the secondary coil when the mouthpiece is connected to the main body, the diameter of a winding of the primary coil is about 10 millimeters, the diameter of a winding of the secondary coil is about 8 millimeters, and the primary coil and the secondary coil each have 15 windings and each have a length in a direction perpendicular to the diameter of a winding of about 10 millimeters.
  • the secondary coil may be arranged coaxially around the primary coil when the mouthpiece is connected to the main body and the diameter of a winding of the secondary coil may be about 10 millimeters and the diameter of a winding of the primary coil may be about 8 millimeters.
  • the secondary coil is be arranged coaxially around the primary coil when the mouthpiece is connected to the main body, the diameter of a winding of the secondary coil is about 10 millimeters, the diameter of a winding of the primary coil is about 8 millimeters, and the primary coil and the secondary coil each have 15 windings and each have a length in a direction perpendicular to the diameter of a winding of about 10 millimeters.
  • the aerosol-generating device may be configured to operate the primary coil with an alternating current at an operating frequency of between 1 kHz and 50 kHz, preferably between 10 kHz and 30 kHz, more preferably between 15 kHz and 25 kHz, most preferably about 20 kHz.
  • the aerosol-generating device may comprise a parallel compensatory inductor.
  • the compensatory inductor may be calibrated to cancel effects of leakage inductance. This may advantageously help to compensate leakage inductive losses in the passive side.
  • the compensatory inductor may be a 10 to 5000 nanohenry inductor, preferably 100 to 300 nanohenry inductor, more preferably a 200 nanohenry inductor.
  • the aerosol-generating device may comprise a 200 nanohenry compensatory inductor and may be configured to operate the primary coil at an alternating current with an operating frequency of between 1 kHz and 100 kHz, preferably between 47 kHz and 67 kHz, more preferably between 55 kHz and 60 kHz, most preferably about 57 kHz.
  • the power supply may provide a peak-to-peak AC of about 6 amperes and the aerosol-generating device may be configured to supply about 4 Watts to the resistive heating element.
  • the mouthpiece comprises a heating chamber for receiving an aerosol-forming substrate.
  • the resistive heating element is arranged at least partly around the heating chamber.
  • the primary coil and the secondary coil may be arranged close to a distal end of the heating chamber with respect to a longitudinal axis of the device.
  • the primary coil and the secondary coil may be arranged at a distal end of the heating chamber with respect to a longitudinal axis of the device.
  • the primary coil and the secondary coil may be helical coils.
  • the primary coil and the secondary coil may be arranged coaxially when the mouthpiece is connected to the main body. Thereby, one of the primary coil and the secondary coil may be inserted into the respective other coil in any rotational position with respect to axis of insertion when attaching the main unit to the mouthpiece. This may additionally allow attaching and detaching of sub-units in an easy-to-operate manner.
  • the primary coil and the secondary coil may be arranged coaxially around a longitudinal central axis of the device when the mouthpiece is connected to the main body.
  • the primary coil may be arranged coaxially around the secondary coil when the mouthpiece is connected to the main body.
  • the secondary coil may be arranged coaxially around the primary coil when the mouthpiece is connected to the main body.
  • the secondary coil may be arranged at least partly around the primary coil when the mouthpiece is connected to the main body.
  • the secondary coil may be arranged entirely around the primary coil when the mouthpiece is connected to the main body. This may improve efficient inductive power transfer from the primary coil to the secondary coil.
  • the secondary coil may be arranged entirely around the primary coil when the mouthpiece is connected to the main body and both coils may have substantially the same length in perpendicular to the diameter of a winding. This may additionally improve efficient inductive power transfer from the primary coil to the secondary coil.
  • the primary coil may be arranged at least partly around the secondary coil when the mouthpiece is connected to the main body.
  • the primary coil may be arranged entirely around the secondary coil when the mouthpiece is connected to the main body. This may improve efficient inductive power transfer from the primary coil to the secondary coil.
  • the primary coil may be arranged entirely around the secondary coil when the mouthpiece is connected to the main body and both coils may have substantially the same length in perpendicular to the diameter of a winding. This may additionally improve efficient inductive power transfer from the primary coil to the secondary coil.
  • the aerosol-generating device may comprise a temperature sensor.
  • the temperature sensor may be operably coupled to control electronics of the aerosol-generating device to control the temperature of the one or more heating elements.
  • the temperature sensor may be positioned in any suitable location.
  • the temperature sensor may be configured to monitor the temperature of the aerosol-forming substrate being heated.
  • the sensor may transmit signals regarding the sensed temperature to the control electronics, which may adjust power or frequency supplied to the primary coil to achieve a suitable temperature at the sensor.
  • the temperature sensor may comprise a thermocouple.
  • the temperature sensor may be comprised in the main body.
  • the primary coil may be arranged coaxially around the temperature sensor.
  • the temperature sensor may be located close to a proximal end of the primary coil with respect to a longitudinal axis of the device.
  • the temperature sensor may be located at a proximal end of the primary coil with respect to a longitudinal axis of the device.
  • the aerosol-forming substrate is heated to a temperature in a range from about 230 °C to about 400 °C, preferably from about 250 °C to about 350 °C.
  • the aerosol-generating device may be a hand-held device.
  • the aerosol-generating device may be a heat-not-burn device.
  • a heat-not-burn device heats the aerosol-forming substrate without combusting it.
  • a heat-not-burn device heats the aerosol-forming substrate to temperatures below its combustion temperature.
  • the mouthpiece may be detachably connectable to the main body by means of a tight fit connection, a magnetic connection, a screw connection, or a bayonet lock.
  • the invention further relates to an aerosol-generating system as defined in claim 12.
  • the aerosol-forming substrate may comprise one or both of cast leaf and reconstituted tobacco.
  • the aerosol-forming substrate may comprise a gel.
  • the invention further relates to a mouthpiece as described herein for use with a main body as described herein.
  • the invention further relates to a main body as described herein for use with a mouthpiece as described herein.
  • the invention further relates to a method for forming an aerosol in an aerosol-generating device as defined in claim 13.
  • the aerosol-generating device may comprise one or more heating elements.
  • One or both of the primary coil and the secondary coil may function as a resistive heating element in addition to their function as an active coil or a passive coil in the inductive system.
  • the functioning of a coil as a resistive heating element may be determined by the intrinsic electric resistance of a coil. For example, a greater intrinsic resistance of a coil may lead to more heat generated in the coil.
  • the secondary coil and the resistive heating element provided in the mouthpiece may be one and the same component.
  • the secondary coil is configured such that, by its intrinsic resistance, it functions as a resistive heating element when electric power is inductively transferred from the primary coil to the secondary coil.
  • the resistive heating element provided in the mouthpiece may be an additional component in wired connection to the secondary coil.
  • the resistive heating element may be formed from one or more resistive heating tracks.
  • the resistive heating tracks may be provided on a flexible substrate.
  • the resistive heating tracks may be printed on the flexible substrate, for example using metallic inks.
  • the resistive heating tracks may act as an electrically resistive heater.
  • the flexible substrate may be electrically insulating.
  • the flexible substrate may be a flexible dielectric substrate.
  • the flexible substrate may comprise polyimide.
  • An example of a suitable material is a polyimide film, such as Kapton ® .
  • the heating element may comprise an electrically resistive material.
  • Suitable electrically resistive materials include but are not limited to: semiconductors such as doped ceramics, electrically "conductive" ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys and composite materials made of a ceramic material and a metallic material.
  • Such composite materials may comprise doped or undoped ceramics.
  • suitable doped ceramics include doped silicon carbides.
  • suitable metals include titanium, zirconium, tantalum platinum, gold and silver.
  • suitable metal alloys include stainless steel, nickel-, cobalt-, chromium-, aluminium- titanium- zirconium-, hafnium-, niobium-, molybdenum-, tantalum-, tungsten-, tin-, gallium-, manganese-, gold- and iron-containing alloys, and super-alloys based on nickel, iron, cobalt, stainless steel, Timetal ® and iron-manganese-aluminium based alloys.
  • the electrically resistive material may optionally be embedded in, encapsulated or coated with an insulating material or vice-versa, depending on the kinetics of energy transfer and the external physicochemical properties required.
  • the heating element may be part of an aerosol-generating device.
  • the aerosol-generating device may comprise an internal heating element or an external heating element, or both internal and external heating elements, where "internal” and “external” refer to the aerosol-forming substrate.
  • An internal heating element may take any suitable form.
  • an internal heating element may take the form of a heating blade.
  • the internal heater may take the form of a casing or substrate having different electro-conductive portions, or an electrically resistive metallic tube.
  • the internal heating element may be one or more heating needles or rods that run through the center of the aerosol-forming substrate.
  • the internal heating element may be deposited in or on a rigid carrier material.
  • the electrically resistive heating element may be formed using a metal having a defined relationship between temperature and resistivity.
  • the metal may be formed as a track on a suitable insulating material, such as ceramic material, and then sandwiched in another insulating material, such as a glass. Heaters formed in this manner may be used to both heat and monitor the temperature of the heating elements during operation.
  • An external heating element may take any suitable form.
  • an external heating element may take the form of one or more flexible heating foils on a dielectric substrate, such as polyimide.
  • the flexible heating foils can be shaped to conform to the perimeter of the substrate receiving cavity.
  • an external heating element may take the form of a metallic grid or grids, a flexible printed circuit board, a molded interconnect device (MID), ceramic heater, flexible carbon fibre heater or may be formed using a coating technique, such as plasma vapour deposition, on a suitable shaped substrate.
  • An external heating element may also be formed using a metal having a defined relationship between temperature and resistivity. In such an exemplary device, the metal may be formed as a track between two layers of suitable insulating materials. An external heating element formed in this manner may be used to both heat and monitor the temperature of the external heating element during operation.
  • the heating element advantageously heats the aerosol-forming substrate by means of conduction.
  • the heating element may be at least partially in contact with the substrate, or the carrier on which the substrate is deposited.
  • the heat from either an internal or external heating element may be conducted to the substrate by means of a heat conductive element.
  • the aerosol-forming substrate may be completely contained within the aerosol-generating device. In that case, a user may puff on a mouthpiece of the aerosol-generating device.
  • a smoking article containing the aerosol-forming substrate may be partially contained within the aerosol-generating device. In that case, the user may puff directly on the smoking article.
  • the term 'aerosol-forming substrate' refers to a substrate capable of releasing volatile compounds that can form an aerosol.
  • the volatile compounds may be released by heating or combusting the aerosol-forming substrate.
  • volatile compounds may be released by a chemical reaction or by a mechanical stimulus, such as ultrasound.
  • An aerosol-forming substrate may be part of an aerosol-generating article.
  • the aerosol-forming substrate comprises plant material and an aerosol former.
  • the plant material is a plant material comprising an alkaloid, more preferably a plant material comprising nicotine, and more preferably a tobacco-containing material.
  • the aerosol-forming substrate comprises at least 70 percent of plant material, more preferably at least 90 percent of plant material by weight on a dry weight basis.
  • the aerosol-forming substrate comprises less than 95 percent of plant material by weight on a dry weight basis, such as from 90 to 95 percent of plant material by weight on a dry weight basis.
  • the aerosol-forming substrate comprises at least 5 percent of aerosol former, more preferably at least 10 percent of aerosol former by weight on a dry weight basis.
  • the aerosol-forming substrate comprises less than 30 percent of aerosol former by weight on a dry weight basis, such as from 5 to 30 percent of aerosol former by weight on a dry weight basis.
  • the aerosol-forming substrate comprises plant material and an aerosol former, wherein the substrate has an aerosol former content of between 5% and 30% by weight on a dry weight basis.
  • the plant material is preferably a plant material comprising an alkaloid, more preferably a plant material comprising nicotine, and more preferably a tobacco-containing material.
  • Alkaloids are a class of naturally occurring nitrogen-containing organic compounds. Alkaloids are found mostly in plants, but are also found in bacteria, fungi and animals. Examples of alkaloids include, but are not limited to, caffeine, nicotine, theobromine, atropine and tubocurarine. A preferred alkaloid is nicotine, which may be found in tobacco.
  • An aerosol-forming substrate may comprise nicotine.
  • An aerosol-forming substrate may comprise tobacco, for example may comprise a tobacco-containing material containing volatile tobacco flavour compounds, which are released from the aerosol-forming substrate upon heating.
  • an aerosol-forming substrate may comprise homogenised tobacco material, for example cast leaf tobacco.
  • the aerosol-forming substrate is solid, wherein the aerosol-forming substrate may comprise both solid and liquid components.
  • the aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds, which are released from the substrate upon heating.
  • the aerosol-forming substrate may comprise a non-tobacco material.
  • the aerosol-forming substrate may further comprise an aerosol former. Examples of suitable aerosol formers are glycerine and propylene glycol.
  • cast leaf is used herein to refer to a sheet product made by a casting process that is based on casting a slurry comprising plant particles (for example, clove particles, or tobacco particles and clove particles in a mixture) and a binder (for example, guar gum) onto a supportive surface, such as a belt conveyor, drying the slurry and removing the dried sheet from the supportive surface.
  • a slurry comprising plant particles (for example, clove particles, or tobacco particles and clove particles in a mixture) and a binder (for example, guar gum) onto a supportive surface, such as a belt conveyor, drying the slurry and removing the dried sheet from the supportive surface.
  • a supportive surface such as a belt conveyor
  • An example of the casting or cast leaf process is described in, for example, US-A-5,724,998 for making cast leaf tobacco.
  • particulate plant materials are mixed with a liquid component, typically water, to form a slurry.
  • Other added components in the slurry may include fibres,
  • the term 'aerosol-generating article' refers to an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol.
  • An aerosol-generating article may be disposable.
  • the term 'aerosol-generating device' refers to a device that interacts with an aerosol-forming substrate to generate an aerosol.
  • An aerosol-generating device may interact with one or both of an aerosol-generating article comprising an aerosol-forming substrate, and a cartridge comprising an aerosol-forming substrate.
  • the aerosol-generating device may heat the aerosol-forming substrate to facilitate release of volatile compounds from the substrate.
  • An electrically operated aerosol-generating device may comprise an atomiser, such as an electric heater, to heat the aerosol-forming substrate to form an aerosol.
  • the term 'aerosol-generating system' refers to the combination of an aerosol-generating device with an aerosol-forming substrate.
  • the aerosol-generating system refers to the combination of the aerosol-generating device with the aerosol-generating article.
  • the aerosol-forming substrate and the aerosol-generating device cooperate to generate an aerosol.
  • the aerosol-forming substrate may comprise a gel.
  • the gel may be tobacco-free.
  • the gel may comprise nicotine or a tobacco product or another target compound for delivery to a user.
  • the nicotine may be included in the gel with an aerosol-former. Additional tobacco or non-tobacco volatile flavour compounds, to be released upon heating, may be comprised.
  • the gel may be immobilized at room temperature. "Immobilized” in this context means that the gel has a stable size and shape and does not flow. Room temperature in this context means 25 degrees Celsius.
  • the gel may comprise an aerosol-former as described herein.
  • the gel may comprise a gelling agent.
  • the gel comprises agar or agarose or sodium alginate.
  • the gel may comprise Gellan gum.
  • the gel may comprise a mixture of materials.
  • the gel may comprise water.
  • the gel may comprise a thermoreversible gel. This means that the gel will become fluid when heated to a melting temperature and will set into a gel again at a gelation temperature.
  • the gelation temperature is preferably at or above room temperature and atmospheric pressure. Atmospheric pressure means a pressure of 1 atmosphere.
  • the melting temperature is preferably higher than the gelation temperature. Preferably the melting temperature of the gel is above 50 degrees Celsius, or 60 degrees Celsius, or 70 degrees Celsius, and more preferably above 80 degrees Celsius.
  • the melting temperature in this context means the temperature at which the gel is no longer immobilized and begins to flow.
  • the gel may be provided as a single block or may be provided as a plurality of gel elements, for example beads or capsules.
  • the gel When agar is used as the gelling agent, the gel preferably comprises between 0.5 and 5% by weight (and more preferably between 0.8 and1% by weight) agar.
  • the gel may further comprise between 0.1 and 2% by weight nicotine.
  • the gel may further comprise between 30% and 90% by weight (and more preferably between 70 and 90% by weight) glycerin.
  • a remainder of the gel may comprise water and any flavourings.
  • the gel preferably comprises between 0.5 and 5% by weight Gellan gum.
  • the gel may further comprise between 0.1 and 2% by weight nicotine.
  • the gel may further comprise between 30% and 99.4% by weight glycerine.
  • a remainder of the gel may comprise water and any flavourings.
  • the gel comprises 2% by weight nicotine, 70% by weight glycerol, 27% by weight water and 1 % by weight agar. In another embodiment, the gel comprises 65% by weight glycerol, 20% by weight water, 14.3% by weight tobacco and 0.7% by weight agar.
  • the term 'longitudinal' is used to describe the direction along the main axis of the aerosol-generating device, and the term 'transverse' is used to describe the direction perpendicular to the longitudinal direction.
  • the longitudinal axis of the heating chamber is parallel with the longitudinal axis of the aerosol-generating device.
  • the longitudinal axis of the heating chamber is at an angle to the longitudinal axis of the aerosol-generating device, for example transverse to the longitudinal axis of the aerosol-generating device.
  • the open end of the heating chamber is positioned along one side of the aerosol-generating device such that an aerosol-generating article may be inserted into the heating chamber in direction which is perpendicular to the longitudinal axis of the aerosol-generating device.
  • the term 'proximal' refers to a user end, or mouth end of the aerosol-generating-device, and the term 'distal' refers to the end opposite to the proximal end.
  • the term 'proximal' refers to the region closest to the open end of the heating chamber and the term 'distal' refers to the region closest to the closed end.
  • the ends of the aerosol-generating device or the heating chamber may also be referred to in relation to the direction in which air flows through the aerosol-generating device.
  • the proximal end may be referred to as the 'downstream' end and the distal end referred to as the 'upstream' end.
  • the term 'length' refers to the major dimension in a longitudinal direction of the heating chamber, of an aerosol-generating device, of an aerosol-generating article, or of a component of the aerosol-generating device, or of the aerosol-generating article.
  • the term 'width' refers to the major dimension in a transverse direction, of the heating chamber, of an aerosol-generating device, of an aerosol-generating article, or of a component of the aerosol-generating device, or of the aerosol-generating article, at a particular location along its length.
  • the term 'thickness' refers to the dimension in a transverse direction perpendicular to the width.
  • Figures 1 and 2 show cross-sections of an aerosol-generating device in side view.
  • the aerosol-generating device of Figures 1 and 2 is oriented such that the mouth-end side of the device is at the right-hand side of the Figures.
  • FIG. 1 shows the aerosol-generating device in a disassembled configuration.
  • the aerosol-generating device comprises a main body 10.
  • the main body 10 comprises a primary coil 12 and a power supply 14.
  • the main body 10 further comprises a temperature sensor 16.
  • the main body 10 further comprises control electronics 18 in wired connection to both of the primary coil 12, the power supply14, and the temperature sensor 16.
  • the control electronics 18 controls operation of the aerosol-generating device.
  • the primary coil 12 is arranged coaxially around the temperature sensor 16.
  • the temperature sensor 16 is located at a proximal end of the primary coil 12 with respect to a longitudinal axis of the aerosol-generating device.
  • the aerosol-generating device further comprises a mouthpiece 20.
  • the mouthpiece 20 comprises a secondary coil 22 and a resistive heating element 24.
  • the resistive heating element 24 comprise electrically conductive tracks on a flexible insulating substrate. The electrically conductive tracks are in wired connection to the secondary coil 22.
  • the mouthpiece 20 further comprises a heating chamber 26.
  • the resistive heating element 24 coaxially surrounds the heating chamber 26.
  • the heating chamber 26 is configured to receive a cylindrical aerosol-generating article 28 comprising an aerosol-forming substrate.
  • the mouthpiece 20 is detachably connectable to the main body 10.
  • Fig. 1 the detached configuration is shown. In this configuration, the primary coil 12 and the secondary coil 22 are not inductively coupled.
  • Fig. 2 shows the aerosol-generating device of Fig. 1 in an assembled configuration.
  • the mouthpiece 20 is connected to the main body 10.
  • the secondary coil 22 coaxially surrounds the primary coil 12 such that the primary coil 12 and the secondary coil 22 are inductively coupled.
  • the primary coil 12 and the secondary coil 22 are arranged at a distal end of the heating chamber 26 with respect to a longitudinal axis of the aerosol-generating device.
  • the primary coil 12 and the secondary coil 22 are arranged coaxially around a longitudinal central axis of the aerosol-generating device when the mouthpiece 10 is connected to the main body 20.
  • the power supply 14 provides electric power to the primary coil 12 under control of the control electronics 18. Electric power is thus transferred from the primary coil 12 to the secondary coil 22 via inductive coupling.
  • the electric power transferred from the primary coil 12 to the secondary coil 22 via inductive coupling is supplied from the secondary coil 22 to the resistive heating element 24 by a wired connection and is used to heat the resistive heating element 24.
  • the resistive heating element 24 heats the aerosol-generating article 28 located within the heating chamber 26.
  • the control electronics 18 may be configured to supply an alternating current to the primary coil 12.
  • An alternating current may be induced in the secondary coil 22.
  • the mouthpiece 20 may comprise a rectifier arranged in electric connection between the secondary coil 22 and the resistive heating element 24 to supply direct current to the resistive heating element 24.
  • Figures 3 and 4 show cross-sections of an aerosol-generating device in side view.
  • the aerosol-generating device of Figures 3 and 4 is oriented such that the mouth-end side of the device is at the right-hand side of the Figures.
  • Figure 3 shows the aerosol-generating device in a disassembled configuration.
  • Fig. 4 shows the aerosol-generating device of Fig. 3 in an assembled configuration.
  • the same reference numerals are used for likewise features as in the embodiment of Figs. 1 and 2 .
  • each of the primary coil 12 and the secondary coil 22 of the embodiment of Figs. 3 and 4 is designed with an intrinsic resistance required for resistive heating. Both the primary coil 12 and the secondary coil 22 are thereby configured to perform an additional resistive heating function in addition to the inductive coupling function.
  • the aerosol-generating article 28 comprises a recess for insertion of the primary coil 12 and the temperature sensor 16 into the recess.
  • the primary coil 12 transfers electric power to the secondary coil 22 by means of inductive coupling.
  • the primary coil 12 functions as a resistive heating element to internally heat the aerosol-generating article 28 when the primary coil 12 is inserted into the recess of the aerosol-generating article 28 as shown in Fig. 4 .
  • the secondary coil 22 receives electric power from the primary coil 12 by means of inductive coupling. Additionally, the secondary coil 22 functions as a resistive heating element to externally heat the aerosol-generating article 28 when the aerosol-generating article 28 is inserted into the heating chamber 24 as shown in Fig. 4 .
  • Fig. 5 shows a diagram of an electric circuit of an aerosol-generating device. There is no wired connection between the main body 10 and the mouthpiece 20. Only the main body 10 comprises a power supply 14. The mouthpiece 20 does not comprise a power supply.
  • the primary coil 12 is in wired connection to the power supply 14.
  • the primary coil 12 and the power supply 14 form part of a primary wired circuit housed within the main body 10.
  • the secondary coil 22 and the resistive heating element 24 form part of a secondary wired circuit housed within the mouthpiece 20.
  • electric power is transferred from the primary coil 12 to the secondary coil 22 via inductive coupling of the primary coil 12 and the secondary coil 22.
  • the electric power transferred to the secondary coil 22 via inductive coupling is used for heating the resistive heating element 24.
  • the resistive heating element 24 may be an additional component in wired connection to the secondary coil 22, for example electrically conductive tracks on a flexible insulating substrate wrapped around the heating chamber 26 as shown in the embodiment of Figs. 1 and 2 .
  • the secondary coil 22 itself may function as a resistive heating element as shown in the embodiment of Figs. 3 and 4 .
  • an additional resistor 30 may be comprised in the main body 10.
  • the resistor 30 may represent the intrinsic resistance of the primary coil 12 which may function as a resistive heating element as shown in the embodiment of Figs. 3 and 4 .
  • the resistor 30 may be an additional component in wired connection to the primary coil 12, for example, an additional resistive heating element.

Landscapes

  • Resistance Heating (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • General Induction Heating (AREA)
  • Nozzles (AREA)

Claims (13)

  1. Aerosolerzeugungsvorrichtung, umfassend
    einen Hauptkörper (10), umfassend eine Primärspule (12) und eine Energieversorgung (14); und
    ein Mundstück (20), umfassend
    eine Sekundärspule (22),
    ein Widerstandsheizelement (24), und
    eine Heizkammer (26) für ein Aufnehmen eines festen aerosolbildenden Substrats, wobei das Widerstandsheizelement (24) wenigstens teilweise um die Heizkammer (26) herum angeordnet ist;
    wobei das Mundstück (20) lösbar mit dem Hauptkörper (10) verbindbar ist; und
    wobei die Vorrichtung derart ausgelegt ist, dass die Primärspule (12) und die Sekundärspule (22) induktiv gekoppelt sind, wenn das Mundstück (20) mit dem Hauptkörper (10) verbunden ist.
  2. Aerosolerzeugungsvorrichtung nach Anspruch 1, wobei zwischen dem Hauptkörper (10) und dem Mundstück (20) keine drahtgebundene Verbindung besteht.
  3. Aerosolerzeugungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, wobei die Primärspule (12) und die Sekundärspule (22) an einem distalen Ende der Heizkammer (26) in Bezug auf eine Längsachse der Vorrichtung angeordnet sind.
  4. Aerosolerzeugungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, wobei die Primärspule (12) und die Sekundärspule (22) koaxial um eine Längsmittelachse der Vorrichtung angeordnet sind, wenn das Mundstück (20) mit dem Hauptkörper (10) verbunden ist.
  5. Aerosolerzeugungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, wobei die Sekundärspule (22) wenigstens teilweise um die Primärspule (12) herum angeordnet ist, wenn das Mundstück (20) mit dem Hauptkörper (10) verbunden ist.
  6. Aerosolerzeugungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, wobei die Vorrichtung so ausgelegt ist, dass die von der Primärspule (12) über induktive Kopplung an die Sekundärspule (22) übertragene elektrische Energie für ein Erwärmen des Widerstandsheizelements (24) verwendet wird.
  7. Aerosolerzeugungsvorrichtung nach Anspruch 6, wobei die Vorrichtung so ausgelegt ist, dass die für das Erwärmen des Widerstandsheizelements (24) verwendete elektrische Energie von der Sekundärspule (22) dem Widerstandsheizelement (24) über eine drahtgebundene Verbindung zugeführt wird.
  8. Aerosolerzeugungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, wobei die Vorrichtung so ausgelegt ist, dass sie einen in der Sekundärspule (22) induzierten Wechselstrom dem Widerstandsheizelement (24) zuführt.
  9. Aerosolerzeugungsvorrichtung nach Anspruch 8, wobei das Mundstück (20) einen Gleichrichter aufweist, der in elektrischer Verbindung zwischen der Sekundärspule (22) und dem Widerstandsheizelement (24) angeordnet ist, um dem Widerstandsheizelement (24) Gleichstrom zuzuführen.
  10. Aerosolerzeugungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, wobei die Primärspule (12) und die Sekundärspule (22) Wendelspulen sind, bevorzugt, wobei beide Spulen die gleiche Windungszahl aufweisen.
  11. Aerosolerzeugungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, wobei die Aerosolerzeugungsvorrichtung eine Erwärmen-nicht-Verbrennen-Vorrichtung ist.
  12. Aerosolerzeugungssystem, umfassend die Aerosolerzeugungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche und einen aerosolerzeugenden Artikel (28), umfassend das aerosolbildende Substrat, wobei der aerosolerzeugende Artikel (28) ausgelegt ist, wenigstens teilweise in eine Heizkammer (26) der Aerosolerzeugungsvorrichtung eingesetzt zu werden, und
    wobei das aerosolbildende Substrat ein festes aerosolbildendes Substrat ist.
  13. Verfahren für ein Bilden eines Aerosols in einer Aerosolerzeugungsvorrichtung, umfassend die Schritte des
    Erzeugens eines elektrischen Wechselstroms in einer Primärspule (12), die innerhalb eines Hauptkörpers (10) der Aerosolerzeugungsvorrichtung untergebracht ist;
    Induzierens, durch ein Wechselfeld, das durch den Wechselstrom in der Primärspule (12) erzeugt wird, eines elektrischen Stroms in einer Sekundärspule (22), die induktiv mit der Primärspule (12) gekoppelt ist und innerhalb eines Mundstücks (20) der Aerosolerzeugungsvorrichtung untergebracht ist, wobei das Mundstück (20) lösbar mit dem Hauptkörper (10) verbunden ist und das Mundstück (20) eine Heizkammer (26) für ein Aufnehmen eines festen aerosolbildenden Substrats umfasst;
    Widerstanderwärmens, durch den in der Sekundärspule (22) induzierten elektrischen Strom, eines Widerstandsheizelements (24) in drahtgebundener Verbindung mit der Sekundärspule (22), wobei das Widerstandsheizelement (24) wenigstens teilweise um die Heizkammer (26) herum angeordnet ist; und
    Erzeugens eines Aerosols aus einem festen aerosolbildenden Substrat in thermischem Kontakt mit dem Widerstandsheizelement (24).
EP22721063.0A 2021-04-12 2022-04-07 Induktiv gekoppelter heizkörper Active EP4322778B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21167882 2021-04-12
PCT/EP2022/059189 WO2022218791A1 (en) 2021-04-12 2022-04-07 Inductively coupled heater

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EP4322778A1 EP4322778A1 (de) 2024-02-21
EP4322778C0 EP4322778C0 (de) 2025-07-30
EP4322778B1 true EP4322778B1 (de) 2025-07-30

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KR (1) KR20230157403A (de)
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CN120693077A (zh) * 2023-02-23 2025-09-23 菲利普莫里斯生产公司 具有改进的电子器件布置的气溶胶生成系统
WO2025163081A1 (en) * 2024-02-02 2025-08-07 Philip Morris Products S.A. An aerosol-generating device having a heater and a heat-conducting element
WO2025163077A1 (en) * 2024-02-02 2025-08-07 Philip Morris Products S.A. An aerosol-generating device having a heat-conducting element and a heating element
WO2026048030A1 (ja) * 2024-08-30 2026-03-05 日本たばこ産業株式会社 エアロゾル生成装置

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JP3681410B2 (ja) 1992-04-09 2005-08-10 フィリップ・モーリス・プロダクツ・インコーポレイテッド 再構成タバコシート及びその製造法及び使用法
US7726320B2 (en) * 2006-10-18 2010-06-01 R. J. Reynolds Tobacco Company Tobacco-containing smoking article
GB201207039D0 (en) * 2012-04-23 2012-06-06 British American Tobacco Co Heating smokeable material
CN106686995B (zh) * 2014-07-24 2020-12-29 奥驰亚客户服务有限责任公司 电子烟装置及其构件
GB201423315D0 (en) * 2014-12-29 2015-02-11 British American Tobacco Co Apparatus for heating smokable material
GB201511361D0 (en) * 2015-06-29 2015-08-12 Nicoventures Holdings Ltd Electronic vapour provision system
US20170055584A1 (en) * 2015-08-31 2017-03-02 British American Tobacco (Investments) Limited Article for use with apparatus for heating smokable material
WO2018112766A1 (zh) * 2016-12-20 2018-06-28 惠州市吉瑞科技有限公司深圳分公司 雾化器
KR102363814B1 (ko) * 2017-01-25 2022-02-15 니코벤처스 트레이딩 리미티드 흡연 가능한 재료를 가열하기 위한 장치
US11980231B2 (en) * 2019-01-15 2024-05-14 Kt&G Corporation Aerosol generating system and method of operating the same
JP6837594B1 (ja) * 2020-09-30 2021-03-03 日本たばこ産業株式会社 エアロゾル吸引器の電源ユニット及びエアロゾル吸引器

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IL307254A (en) 2023-11-01
KR20230157403A (ko) 2023-11-16
EP4322778C0 (de) 2025-07-30
JP2024517386A (ja) 2024-04-22
CN117082990A (zh) 2023-11-17
WO2022218791A1 (en) 2022-10-20
US20240381936A1 (en) 2024-11-21
EP4322778A1 (de) 2024-02-21

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