EP4247118A1 - Procédé de mesure de la température d'un suscepteur - Google Patents

Procédé de mesure de la température d'un suscepteur Download PDF

Info

Publication number
EP4247118A1
EP4247118A1 EP22162934.8A EP22162934A EP4247118A1 EP 4247118 A1 EP4247118 A1 EP 4247118A1 EP 22162934 A EP22162934 A EP 22162934A EP 4247118 A1 EP4247118 A1 EP 4247118A1
Authority
EP
European Patent Office
Prior art keywords
susceptor
temperature
aerosol generating
thermal radiation
measured
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
EP22162934.8A
Other languages
German (de)
English (en)
Inventor
Branislav ZIGMUND
Stanislav SLIVA
Daniel Vanko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JT International SA
Original Assignee
JT International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JT International SA filed Critical JT International SA
Priority to EP22162934.8A priority Critical patent/EP4247118A1/fr
Publication of EP4247118A1 publication Critical patent/EP4247118A1/fr
Pending legal-status Critical Current

Links

Images

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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • 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
    • A24F40/46—Shape or structure of electric heating means
    • A24F40/465—Shape or structure of electric heating means specially adapted for induction heating
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the present disclosure relates generally to a method for measuring the temperature of a susceptor, and more particularly to a method for measuring the temperature of an inductively heated susceptor.
  • Aerosol generating devices also known as vaporisers which heat, rather than burn or combust, an aerosol generating substrate to produce an aerosol for inhalation by a user of the device have become popular with consumers in recent years as an alternative to the use of traditional tobacco products.
  • an induction heating assembly Such assemblies employ an electromagnetic field generator, such as an induction coil, to generate an alternating electromagnetic field that couples with, and inductively heats, a susceptor heating element. Heat from the susceptor is transferred, for example by conduction, to the substrate and an aerosol is generated as the substrate is heated for inhalation by a user of the device.
  • an electromagnetic field generator such as an induction coil
  • the temperature of an inductively heated susceptor can be estimated. Based on the estimated temperature, adjustments can be made to one or more operating parameters, such as moderating power supply to the induction coil, to maintain a target operating temperature to ensure a sufficient amount of vapour is generated during use.
  • one or more operating parameters such as moderating power supply to the induction coil
  • a method comprising:
  • the thermal radiation emitted from the susceptor may be detected by a thermal imaging camera.
  • the susceptor may be inductively heated by an induction coil.
  • the induction coil may be arranged to surround the susceptor.
  • the method comprises:
  • the thermal radiation may be reflected by a mirror.
  • a reflective surface of the mirror may comprise gold.
  • the method may comprise comparing the measured susceptor temperature with an estimated susceptor temperature.
  • the method comprises:
  • the susceptor may be substantially cylindrical.
  • the susceptor may be a susceptor tube.
  • the susceptor may be substantially planar.
  • the susceptor may be a susceptor strip.
  • the susceptor is useable as a heating element as part of an induction heating assembly of an aerosol generating system, wherein the aerosol generating system comprises an aerosol generating device and an aerosol generating substrate.
  • the method according to examples of the disclosure provides accurate measurement of the actual temperature of an inductively heated susceptor in real time allowing comparison to an estimated susceptor temperature.
  • Examples of the disclosure provide a method for measuring the temperature of an inductively heated susceptor 10. Accordingly, a method is provided for measuring the temperature of a susceptor 10 which has been inductively heated or is being inductively heated. The method is a non-contact method.
  • a susceptor 10 is useable as a heating element 12 as part of an induction heating assembly 14, i.e., an induction heating system, of an aerosol generating system 16.
  • An aerosol generating system 16 comprises an aerosol generating device 18 (also known as a vaporiser) and an aerosol generating substrate 20.
  • An aerosol generating device 18 is a hand-held, portable, device, by which it is meant that a user is able to hold and support the device 18 unaided, in a single hand.
  • an induction coil 22, i.e., an electromagnetic field generator, comprised in the induction heating assembly 14 is arranged to be energised to generate an alternating electromagnetic field that couples with, and inductively heats, the susceptor 10 due to eddy currents and magnetic hysteresis losses resulting in a conversion of energy from electromagnetic to heat.
  • Heat from the susceptor 10 is transferred, for example by conduction, radiation and convection, to the aerosol generating substrate 20 to heat the aerosol generating substrate 20 (without burning or combusting the aerosol generating substrate 20) thereby generating a vapour which cools and condenses to form an aerosol for inhalation by a user of the aerosol generating device 18.
  • vapour is a substance in the gas phase at a temperature lower than its critical temperature, which means that the vapour can be condensed to a liquid by increasing its pressure without reducing the temperature
  • aerosol is a suspension of fine solid particles or liquid droplets, in air or another gas.
  • Aerosol generating devices 10 typically include a controller 26 and a user interface for controlling the operation of the aerosol generating device 18 via the controller 26.
  • the controller 26 is configured to detect the initiation of use of the aerosol generating device 18, for example, in response to a user input, such as a button press to activate the aerosol generating device 18, or in response to a detected airflow through the aerosol generating device 18.
  • a user input such as a button press to activate the aerosol generating device 18, or in response to a detected airflow through the aerosol generating device 18.
  • an airflow through the aerosol generating device 18 is indicative of a user inhalation or 'puff.
  • the aerosol generating device 18 may, for example, include a puff detector, such as an airflow sensor (not shown), to detect an airflow through the aerosol generating device 18.
  • the controller 26 includes electronic circuitry.
  • the power source 24 and the electronic circuitry may be configured to operate at a high frequency.
  • the power source 24 and the electronic circuitry may be configured to operate at a frequency of between approximately 80 kHz and 500 kHz, possibly between approximately 150 kHz and 250 kHz, and possibly at approximately 200 kHz.
  • the power source 24 and the electronic circuitry could be configured to operate at a higher frequency, for example in the MHz range, if required.
  • the induction coil 22 may be arranged around the susceptor 10, for example to surround or fully surround the susceptor 10.
  • the induction coil 22 may be substantially helical in shape.
  • the induction coil 22 may be annular.
  • the induction coil 22 may comprise a Litz wire or a Litz cable. It will, however, be understood that other materials could be used.
  • the induction coil 22 may be arranged to operate in use with a fluctuating electromagnetic field having a magnetic flux density of between approximately 20mT and approximately 2.0T at the point of highest concentration.
  • the induction heating assembly 14 may have an arrangement in which one or more susceptors 10 are arranged around the periphery of a heating compartment (not shown) configured for receiving an aerosol generating substrate 20.
  • a susceptor 10 may be arranged to project into a heating compartment (not shown) from an end of the heating compartment to penetrate the aerosol generating substrate 20 when the aerosol generating substrate 20 is received in the heating compartment.
  • the susceptor 10 may be a blade or pin as described below.
  • the susceptor 20 is comprised in the aerosol generating device 18, as illustrated diagrammatically in Figure 1 .
  • the susceptor 10 is instead provided in the aerosol generating substrate 20 during manufacture.
  • the susceptor 10 comprises an electrically conductive material.
  • the susceptor 10 may comprise one or more, but not limited to, of graphite, molybdenum, silicon carbide, niobium, aluminium, iron, nickel, nickel containing compounds, titanium, mild steel, stainless steel, low carbon steel and alloys thereof, e.g., nickel chromium or nickel copper, and composites of metallic materials.
  • the susceptor 10 comprises a metal selected from the group consisting of mild steel, stainless steel, and low carbon stainless steel.
  • Susceptors 10 may comprise a variety of geometrical configurations.
  • a susceptor 10 may be cylindrical (i.e., a cylindrical susceptor or substantially cylindrical susceptor), or planar (i.e., a planar susceptor or substantially planar susceptor).
  • Susceptors 10 may be open-ended, hollow and/or elongate.
  • susceptors 10 include, but are not limited to, a particulate susceptor, a susceptor filament, a susceptor mesh, a susceptor wick, a susceptor pin, a susceptor rod, a susceptor blade, a susceptor strip, a susceptor sleeve, a susceptor tube, a susceptor ring, and a susceptor cup.
  • a susceptor strip may be elongate.
  • FIGS 2 and 3 respectively show examples of different types of susceptor tubes 28, 30 each having a tube wall 32.
  • openings 34 extend through the tube wall 32.
  • the openings 34 are apertures, through-holes, or perforations.
  • the tube wall 32 comprises a plurality of openings 34.
  • the openings 34 are substantially circular shaped openings. In other examples, the openings 34 may have a different shape.
  • the openings 34 are distributed over the majority of the tube wall 32.
  • the openings 34 are arranged in rows. Each row extends around the circumference of the susceptor tube 28. Accordingly, the openings 34 are arranged in circumferentially adjacent rows. The openings 34 in adjacent rows are staggered.
  • the openings 34 in each row are axially offset from the openings 34 in circumferentially adjacent rows to provide a staggered arrangement of the openings 34.
  • the openings 34 in each row are uniformly spaced apart.
  • the rows are uniformly spaced apart.
  • the susceptor tube 28 may be an outer susceptor or peripheral susceptor, i.e., locatable on the outside of an aerosol generating substrate.
  • the susceptor tube 30 has a longer axial length and a reduced diameter compared to the susceptor tube 28 shown in Figure 2 . Furthermore, the tube wall 32 of the susceptor tube 30 does not comprise openings extending therethrough.
  • the susceptor tube 30 may be a central or inner susceptor, i.e., locatable within an aerosol generating substrate or on the inside of an aerosol generating substrate.
  • Susceptors 10 may have a thickness up to 150 ⁇ m, or up to 300 ⁇ m, or preferably may have a thickness from 30 ⁇ m to 300 ⁇ m, or more preferably may have a thickness from 100 ⁇ m to 150 ⁇ m, or most preferably may have a thickness of 100 ⁇ m.
  • a susceptor 10 having these thickness dimensions may be particularly suitable for being inductively heated during use.
  • an inductively heated susceptor 10 i.e., a susceptor 10 which has been inductively heated or is being inductively heated
  • the controller 26 can estimate, for instance by the controller 26, using one of a number of different methods. Such methods may rely on an algorithm.
  • the temperature estimation may be based on the electrical resistance of the susceptor 10. Electrical resistance changes proportionally with susceptor 10 temperature. During induction heating, the change in the electrical resistance of the susceptor 10 can be observed as a change in resonance frequency and/or a change in the amplitude of resonance peak voltage. Preferably, in such examples an estimation of susceptor 10 temperature is based on resonance peak voltage because this is generally more sensitive to a change in electrical resistance of the susceptor 10.
  • the normal operational temperature of a susceptor 10 in an induction heating assembly 14 of an aerosol generating system 16 is about 350°C, or up to 350°C.
  • Figure 4 illustrates a method for measuring the temperature of a susceptor 10. The method is a non-contact method.
  • the method comprises inductively heating a susceptor 10, detecting the thermal radiation emitted from the susceptor 10, and measuring the temperature of the susceptor 10 based on the emitted thermal radiation.
  • a measured susceptor temperature is provided corresponding to the actual temperature of the susceptor.
  • the thermal radiation emitted from the susceptor 10 is detected by a thermal imaging camera.
  • the susceptor 10 is inductively heated by an induction coil 22.
  • the induction coil 22 may be arranged to surround, or fully surround, the susceptor 10.
  • the induction coil 22 may be as described above.
  • the method comprises detecting a reflection of the thermal radiation emitted from the susceptor 10 and measuring the temperature of the susceptor 10 based on the reflected thermal radiation.
  • the thermal radiation is reflected by a mirror.
  • a reflective surface of the mirror may comprise gold.
  • the method comprises comparing the measured susceptor temperature with an estimated susceptor temperature.
  • the method comprises varying the temperature of the susceptor over a time period and measuring the temperature of the susceptor over the time period.
  • a measured susceptor temperature profile over the time period is provided corresponding to the actual temperature profile of the susceptor.
  • the measured susceptor temperature profile may be compared with an estimated susceptor temperature profile over the same time period.
  • the graph of Figure 5 compares the measured temperature of an inductively heated susceptor 10 (i.e., the actual susceptor temperature) with an estimation of the susceptor temperature over the same time period.
  • the susceptor 10 was inductively heated using an induction coil 22 arranged to fully surround the susceptor 10.
  • the induction coil 22 is of the type described above and had seven turns, an inductance of 0.340 ⁇ H and a resistance of 9.7 mOhm.
  • the susceptor 10 had an outer diameter of 5 mm, a wall thickens of 150 ⁇ m and an axial length of 7 mm.
  • the temperature of the susceptor 10 was varied over the time period indicated in the graph.
  • the power supply to the induction coil 22 was moderated to vary the temperature of the susceptor 10 over the time period.
  • the thermal radiation emitted from the susceptor 10 over the time period was reflected using a mirror having a reflective surface comprising gold.
  • the reflection of the thermal radiation was detected using a thermal imaging camera to provide a measured susceptor temperature profile over the time period.
  • the measured susceptor temperature profile (corresponding to the actual temperature profile of the susceptor 10) is compared with an estimated susceptor temperature profile over the same time period.
  • modification may be required to the method used to provide the temperature estimate to improve accuracy and correspondence. Additional or alternatively, modifications may also be required to the geometry, materials and/or manufacturing process of the susceptor to improve susceptor performance towards an ideal on which temperature estimation methods may be based. In other examples, there may be correspondence, i.e., a close similarity, between the estimated temperature and the actual measured temperature of the susceptor 10, suggesting that modifications are not required to the method used to provide the temperature estimate and/or to the geometry, materials and/or manufacturing process of the susceptor 10.
  • the method according to examples of the disclosure provides accurate measurement of the actual temperature of an inductively heated susceptor 10 in real time allowing comparison to an estimated susceptor temperature.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
EP22162934.8A 2022-03-18 2022-03-18 Procédé de mesure de la température d'un suscepteur Pending EP4247118A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22162934.8A EP4247118A1 (fr) 2022-03-18 2022-03-18 Procédé de mesure de la température d'un suscepteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22162934.8A EP4247118A1 (fr) 2022-03-18 2022-03-18 Procédé de mesure de la température d'un suscepteur

Publications (1)

Publication Number Publication Date
EP4247118A1 true EP4247118A1 (fr) 2023-09-20

Family

ID=80819730

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22162934.8A Pending EP4247118A1 (fr) 2022-03-18 2022-03-18 Procédé de mesure de la température d'un suscepteur

Country Status (1)

Country Link
EP (1) EP4247118A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140091083A1 (en) * 2011-06-14 2014-04-03 Connie McGarvey Induction heating device for heating a liquid
EP3692349A1 (fr) * 2017-10-03 2020-08-12 Philip Morris Products S.a.s. Dispositif de génération d'aérosol et système comprenant un pyromètre
KR20210000980A (ko) * 2019-06-26 2021-01-06 주식회사 케이티앤지 에어로졸 생성 장치
US20210169146A1 (en) * 2018-08-31 2021-06-10 Nicoventures Trading Limited Aerosol generating material characteristic determination

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140091083A1 (en) * 2011-06-14 2014-04-03 Connie McGarvey Induction heating device for heating a liquid
EP3692349A1 (fr) * 2017-10-03 2020-08-12 Philip Morris Products S.a.s. Dispositif de génération d'aérosol et système comprenant un pyromètre
US20210169146A1 (en) * 2018-08-31 2021-06-10 Nicoventures Trading Limited Aerosol generating material characteristic determination
KR20210000980A (ko) * 2019-06-26 2021-01-06 주식회사 케이티앤지 에어로졸 생성 장치

Similar Documents

Publication Publication Date Title
AU2018212429B2 (en) Apparatus for heating smokable material
US20210267280A1 (en) Aerosol Generating System and Device
JP7131760B2 (ja) エアロゾル化可能材料に適した加熱要素
EP3731681B1 (fr) Ensemble de chauffage par induction pour un dispositif de génération de vapeur
EP4247118A1 (fr) Procédé de mesure de la température d'un suscepteur
US20220117306A1 (en) Dual-heating tobacco heater and heating method, and heated tobacco product
CN212852498U (zh) 用于气雾生成装置的感受器、气雾生成装置
WO2023174994A1 (fr) Procede de traitement thermique d'un suscepteur
CN113576048A (zh) 用于气雾生成装置的感受器、气雾生成装置
US20220132931A1 (en) Heater for cigarette-type electronic cigarette device, and cigarette-type electronic cigarette device comprising same
EP4046509A1 (fr) Dispositif de génération de brume gazeuse et récepteur
CN219182802U (zh) 加热器及气溶胶生成装置
WO2023117428A1 (fr) Ensemble de chauffage par induction pour un dispositif de génération d'aérosol
CN111928969B (zh) 锅具温度检测装置、电磁加热装置及锅具温度检测方法
WO2022224318A1 (fr) Dispositif de commande, matériau de base, système, procédé de commande et programme
RU2791009C1 (ru) Определение температуры в нагреваемом по периферии устройстве для генерирования аэрозоля
WO2023165834A1 (fr) Dispositif de génération d'aérosol
WO2024110333A1 (fr) Procédé de formation d'un suscepteur
WO2023227466A1 (fr) Système de génération d'aérosol
EP4042508A1 (fr) Dispositif de génération d'aérosol avec agencement de surveillance de batterie
WO2023208803A1 (fr) Dispositif de génération d'aérosol comprenant un dispositif de chauffage par induction
WO2023194181A1 (fr) Dispositif de génération d'aérosol
CN117918581A (zh) 加热组件及气溶胶生成装置
WO2023001547A1 (fr) Ensemble de chauffage par induction pour un dispositif de génération d'aérosol
WO2022167280A1 (fr) Ensemble de chauffage par induction pour un dispositif de génération d'aérosol

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR