WO2025073628A1 - Dispositif de génération d'aérosol pouvant fonctionner en mode de libération d'aérosol et en mode pause - Google Patents

Dispositif de génération d'aérosol pouvant fonctionner en mode de libération d'aérosol et en mode pause Download PDF

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Publication number
WO2025073628A1
WO2025073628A1 PCT/EP2024/077449 EP2024077449W WO2025073628A1 WO 2025073628 A1 WO2025073628 A1 WO 2025073628A1 EP 2024077449 W EP2024077449 W EP 2024077449W WO 2025073628 A1 WO2025073628 A1 WO 2025073628A1
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WO
WIPO (PCT)
Prior art keywords
temperature
aerosol
mode
pause mode
pause
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
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PCT/EP2024/077449
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English (en)
Inventor
Farhang MOHSENI
Paola ORSOLINI
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
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Filing date
Publication date
Application filed by Philip Morris Products SA filed Critical Philip Morris Products SA
Priority to CN202480061607.2A priority Critical patent/CN121925196A/zh
Publication of WO2025073628A1 publication Critical patent/WO2025073628A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring
    • A24F40/57—Temperature control
    • 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
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/20—Devices using solid inhalable precursors

Definitions

  • Aerosol-generating device operable in an aerosol-releasing mode and in a pause mode
  • an aerosol-generating device and a method of operating an aerosol-generating system with the advantages of prior art solutions, whilst mitigating their limitations.
  • an aerosol-generating device and a method of operating an aerosol-generating system allowing a user to interrupt a user experience and to resume the experience at a later stage with still acceptable quality of the aerosol.
  • the controller may further be configured to interrupt the heat up of the heater when the monitored property reaches the characteristic feature, e.g. an extremal value, wherein the monitored parameter at the characteristic feature (e.g. extremal value) corresponds to a predefined temperature of the heater.
  • the controller may control the heater such that an operation temperature of the heater passes through one or more reference points at which the controller measures one or more calibration values of a temperature dependent property of the heater, i.e. one or more calibration values of a parameter that is indicative of an operation temperature of the heater.
  • the substrate contains tobacco or not
  • aerosol-forming substrates comprising a total aerosol-former content that is greater than or equal 30 percent by weight, in particular greater than 35 percent by weight, more particularly greater than 40 percent by weight or greater than 45 percent by weight.
  • Aerosol-forming substrates comprising no tobacco material may have a higher thermal mass as compared to tobacco containing substrates.
  • One reason is that non-tobacco aerosolforming substrates and tobacco containing aerosol-forming substrates may have different grammages and different thicknesses. Therefore, the aforementioned temperature values and ranges for the temperature level in the pause mode may be particularly applicable for aerosolforming substrates having a higher thermal mass.
  • a higher thermal mass may require a larger surface of the heater used for heating the substrate.
  • a larger surface of surface area of the heater in contact with the substrate also ensures a sufficient heat diffusion across the substrate in the article.
  • an appropriate surface area of a heater in contact with the substrate in particular in case of a strip-like heater, should be greater than 50 square millimeters for non-tobacco aerosol-forming substrates, and below 50 square millimeters for tobacco containing aerosol-forming substrates.
  • the aforementioned temperature values and ranges for the temperature level in the pause mode may be particularly applicable when using a heater that has a surface area in contact with the substrate greater than 50 square millimeters.
  • the aforementioned temperature values and ranges for the temperature level of the pause mode temperature profile may also be the result of a compromise between - on the one hand - a temperature level that is sufficiently low to reduce depletion of the substrate during the pause mode but still sufficiently high to increase the deliveries of the first puff after resumption of the user experience, and - on the other hand - a temperature level that is within a technically feasible regulation range of the controller.
  • the latter may be determined by the physical properties of the heater, as will be discussed in more detail further below.
  • the temperature level of the pause mode temperature profile to which the temperature of the heater is lowered in response to initiating operation in the pause mode may be higher, for instance in a range between 240 °C and 280 °C, in particular in a range between 250 °C and 270 °C, more particularly 260 °C.
  • tobacco-containing aerosol-forming substrates are also given further below.
  • the aforementioned values may also be applicable for other substrate types.
  • the aforementioned higher temperature values and ranges for the pause mode temperature may also be particularly applicable for aerosol-forming substrates having a lower thermal mass.
  • these higher temperature values and ranges may be particularly applicable for aerosol-forming substrates comprising a total aerosol-former content that is lower than 30 percent by weight, in particular lower than 25 percent by weight, preferably lower than 20 percent by weight (in particular irrespective of whether the substrate contains tobacco or not). Also, these higher temperature values and ranges may be particularly applicable when using a heater that has a surface area in contact with the substrate smaller than 50 square millimeters.
  • an aerosol-generating device comprising a controller configured to control a heater for heating an aerosol-forming substrate in order to generate an aerosol.
  • the controller is configured to selectively operate in a heating mode in which the controller controls the heater according to a heating mode temperature profile for generating an aerosol, and in a pause mode in which the controller controls the heater according to a pause mode temperature profile for pausing operation in the heating mode, wherein the heating mode temperature profile and the pause mode temperature profile are chosen such that a temperature of the heater during operation in the pause mode is lower than during operation in the heating mode, and wherein a temperature level of the pause mode temperature profile to which the temperature of the heater is lowered in response to initiating operation in the pause mode is higher, for instance in a range between 240 °C and 280 °C, in particular in a range between 250 °C and 270 °C, more particularly 260 °C; or is less than 150 °C, in particular equal or less than 145 °C; or is at most 145 °C, in particular at most 140 °C, more particularly at most 135 °C; or is in a range between 100 °C and
  • the temperature level of the pause mode temperature profile in said ranges may in particular be an initial temperature level of the pause mode temperature profile to which the temperature of the heater is initially lowered in response to initiating operation in the pause mode.
  • the absolute temperature of the heater during operation in the heating mode is higher than during operation in the pause and may also dependent on the substrate type, in particular on its constituents, the thermal stability of the substrate, the total aerosol-former content, and/or the thermal mass of the substrate; and/or the surface area of the heater in contact with the substrate.
  • the temperature of the heater during operation in the heating mode may be in a range between 200 °C and 300 °C, in particular between 220 °C and 280 °C, more particularly between 250 °C and 260 °C, preferably around 255 °C.
  • non-tobacco aerosol-forming substrates and/or for aerosol-forming substrates having a higher thermal mass
  • aerosol-forming substrates comprising a total aerosol-former content that is greater than or equal 30 percent by weight, in particular greater than 35 percent by weight, more particularly greater than 40 percent by weight or greater than 45 percent by weight, and/or when using a heater that has a surface area in contact with the substrate greater than 50 square millimeters.
  • the temperature of the heater during operation in operation in the heating mode may be in a range between 300 °C and 400 °C, in particular between 320 °C and 380 °C, more particularly between 340 °C and 380 °C.
  • the temperature level of the pause mode temperature profile to which the temperature of the heater is lowered upon initiating operation in the pause mode may be at least 20 °C, at least 50 °C, at least 100°C, at least 120°C, at least 125 °C or at least 130 °C (preferably around 125 °C or 130 °C) lower than a temperature of level of the heating mode temperature profile, in particular a temperature of level of the heating mode temperature profile before, more particularly immediately before initiating operation in the pause mode.
  • the controller may be configured to identify a substrate type that is received in the device for heating.
  • the controller may be configured to identify a type of an aerosol-generating article containing the aerosol-forming substrate to be heated based on an identification means attached to the article or a physical property associated with the article.
  • the controller may be configured to identify an article type of the aerosol-generating article received by the device based on a specific property that is associated with a susceptor arrangement disposed in the article to heat the substrate, wherein the specific property may be different for different articles containing different types of substrate and accordingly different types of susceptor arrangements.
  • the controller may be able to differentiate between different substrate types, for instance, between aerosol-forming substrates containing no tobacco material and aerosol-forming substrates containing tobacco material or a combination of tobacco material and other botanical material(s).
  • the controller may be further configured to select a respective pause mode temperature profile and/or heating mode temperature profile associated with a specific substrate type based on the identified substrate type.
  • the controller may control the temperature of the heater based on one or more calibration/reference values of a temperature dependent property of the heater, each of which is given by a characteristic feature of the property, such as an extremal value, at a respective specific temperature.
  • a characteristic feature of the property such as an extremal value
  • the temperature dependent property of the heater may be the apparent resistance or the apparent conductance of a susceptor that is used as a heater for heating an aerosol-forming substrate by interaction with a varying magnetic field generated by an aerosol-generating device.
  • the susceptor comprises a first and a second susceptor material, wherein the second susceptor material comprises a Curie temperature chosen such as to be close to a desired heating temperature.
  • This susceptor shows a strictly monotonic relationship between its apparent resistance/conductance and its temperature occurring between a first characteristic feature at a first specific temperature and a second characteristic feature at a second specific temperature, both serving as calibration/reference value.
  • the first specific temperature is lower than the second specific temperature.
  • the first specific temperature corresponds to a temperature greater than or equal to the temperature of the susceptor at which the skin depth of the second susceptor material begins to increase, leading to a temporary lowering of the conductance, which causes a first extremal value, here a minimum in the conductance (valley).
  • the second specific temperature is the Curie temperature of the second susceptor material that is associated with a second extremal value, in particular a maximum in the conductance (hill). Further details are described in WO 2023/285458 A1 , the content of which is hereby incorporated entirely into the present specification by reference.
  • the controller may be configured to monitor the conductance and regulate the power provided to the susceptor such that the conductance is at a specific value between the minimum (valley) and the maximum (hill), where the conductance is a strictly monotonic function of the temperature.
  • the controller according to the present invention may be configured to control the temperature of the heater based on monitoring a temperature dependent property of the heater.
  • the property may have at least a first characteristic feature at a first specific temperature, for instance a first extremal value, used as a first temperature reference.
  • the property further has at least a second characteristic feature at a second specific temperature, for instance a second extremal value, used as a second temperature reference.
  • the controller may be configured to monitor the property of the heater and regulate the power provided to the heater such that the property is at a specific value between the first characteristic feature, e.g. the first extremal value, and the second characteristic feature, e.g.
  • the heating mode temperature profile preferably includes, in particular exclusively includes, temperature values between the first specific temperature and the second specific temperature.
  • the temperature level of the pause mode temperature profile to which the temperature of the heater is lowered upon initiating operation in the pause mode preferably may be below the first specific temperature, at a temperature where depletion of the substrate is sufficiently reduced.
  • the specific value for the temperature regulation during the heating mode should be chosen such that it is sufficiently distanced from the minimum (valley) and the maximum (hill) in order to ensure appropriate regulation.
  • the same issue applies to the specific value for regulation at lower temperatures during the pause mode, in particular at temperatures below the minimum.
  • the temperature level of the pause mode temperature profile to which the temperature of the heater is lowered in response to initiating the operation in the pause mode preferably is chosen such that it is as high as possible in order to resume to the paused user experience within a reasonable time, but still sufficiently distanced from the first specific temperature to ensure appropriate regulation.
  • the present invention suggests that the temperature profile used during the pause mode advantageously is not fixed but adaptable, in particular adaptable depending on an operation history during operation in the heating mode prior to operation in the pause mode and/or on a duration of operation in the pause mode. That is, the pause mode temperature profile may be dynamically adjusted depending on the stage of the user experience at which the pause mode was launched and/or the duration of operation in the pause mode.
  • the controller may be configured to determine and/or record the operation history during operation in the heating mode prior to operation in the pause mode. Likewise, the controller may be configured to determine and/or record the duration of operation in the pause mode.
  • the term "operation history during operation in the heating mode prior to operation in the pause mode" relates to the prior course of operation in the heating mode prior to operation in the pause mode.
  • the operation history may include one or more parameters characterizing the operation of the aerosol-generating device until the pause mode is launched.
  • the operation history may include at least one of the following parameters: a number of puffs during operation in the heating mode prior to operation in the pause mode, and a time period of operation in the heating mode prior to operation in the pause mode.
  • the operation history may include one or more other parameters, such as an interval between puffs (for example individual, average, cumulative), a puff strength (e.g.
  • the temperature profile used during the pause mode should be a compromise between, on the one hand, reducing the overall energy consumption and depletion of the substrate during the pause mode and, on the other hand, an optimal first user experience when operation in the heating mode is resumed. While the first two aspects can be achieved by reducing the temperature during the pause mode, the latter aspect requires that the temperature during the pause mode be high enough to return to temperatures at or above the volatilization temperature of the aerosol forming substrate within a reasonable time to meet user requirements.
  • the progression of the (re-)increase of the operation temperature of the heater may depend on the operation history during operation in the heating mode prior to operation in the pause mode.
  • the increase of the operation temperature of the heater may be less progressive with an increasing number of puffs during operation in the heating mode prior to operation in the pause mode and/or with an increasing time period of operation in the heating mode prior to operation in the pause mode. Therefore, the controller may be configured to adapt the pause mode temperature profile such that a progression of an increase of the operation temperature of the heater is adapted depending on the operation history during operation in the heating mode prior to operation in the pause mode.
  • the increase of the operation temperature may be step-wise, too.
  • the controller may be configured to adapt the pause mode temperature profile such that after decreasing the operation temperature over a pre-defined decrease time period an operation temperature of the heater is increased in successive temperature steps as the duration of operation in the pause mode progresses.
  • an increment of the operation temperature of the heater between successive temperature steps may be in a range between 2 °C and 25 °C, in particular between 5 °C and 20 °C, more particularly between 7 °C and 15 °C, for example 10 °C. Increments in these ranges have proven advantageous to adequately prepare the aerosol-forming substrate such as to ensure proper quality of the first puff after resumption of the user experience.
  • the controller may be configured to adapt a respective time period of the successive temperature steps during the increase such that a respective time period of the successive temperature steps during the increase gets longer with an increasing number of puffs during operation in the heating mode prior to operation in the pause mode and/or with an increasing time period of operation in the heating mode prior to operation in the pause mode.
  • the respective time period of the successive temperature steps during the increase may depend - inter alia - on the number of sequence of a respective temperature step.
  • a respective time period of the successive temperature steps may increase from temperature step to temperature step.
  • the increase is less progressive in order to avoid unwanted depletion of the substrate due to a too rapid temperature rise.
  • the longer the pause mode has been active the longer the respective time period of a temperature step during the increase can be.
  • the respective time period of the successive temperature steps during the increase may be or may be adaptable in a range between 15 seconds to 6 minutes, in particular 1 minute and 6 minutes. These values have been proven beneficial for a proper resumption of a user experience.
  • the idea of adapting the pause mode temperature profile depending on an operation history during operation in the heating mode prior to operation in the pause mode and/or on a duration of operation in the pause mode may be particularly advantageous for aerosolforming substrates containing tobacco material or a combination of tobacco material and other botanical material(s), and/or for aerosol-forming substrates comprising a total aerosol-former content that is lower than 30 percent by weight, in particular lower than 25 percent by weight, preferably lower than 20 percent by weight, and/or for aerosol-forming substrates having a lower thermal mass, and/or when using a heater that has a surface area in contact with the substrate smaller than 50 square millimeters
  • aerosol-forming substrates containing no tobacco material i.e. for non-tobacco aerosol-forming substrates, and/or for aerosol-forming substrates having a higher thermal mass
  • aerosol-forming substrates comprising a total aerosol-former content that is greater than or equal 30 percent by weight, in particular greater than 35 percent by weight, more particularly greater than 40 percent by weight or greater than 45 percent by weight; and/or when using a heater that has a surface area in contact with the substrate greater than 50 square millimeters
  • the aerosol-generating device comprises a single sensor or a plurality of sensors, in particular a plurality of sensors of different types.
  • a plurality of sensors may be provided, for example, for reasons of redundancy.
  • Using a plurality of sensors of different types may also facilitate to detect different situations.
  • the device may comprise at least one sensor configured to output a sensor signal indicative of the device being in operation by a user, and at least one other sensor configured to output a sensor signal indicative of the device being in an operation pause.
  • the boost phase is designed such that a temperature of the heater during operation in the temperature boost phase is higher than an initial temperature level at the beginning of the heating mode temperature profile, more particularly an initial temperature level at the beginning of the heating mode temperature profile subsequent to a possible operation in a preparation mode as described further above; and/or than a temperature level in the heating mode before activation of the pause mode.
  • the first puff after resuming the paused user experience is as high as possible in terms of aerosol delivery, preferably almost as high as or even as high as the first puff at the beginning of the user experience. This is an important aspect in order to the satisfy the user who wants to promptly experience a proper puff as soon as the paused user experience is resumed.
  • the boost phase follows termination of operation in the pause mode, i.e. is not part of the pause mode temperature profile, but may rather form part of the heating mode temperature profile, more particularly an initial part of the heating mode temperature profile after termination of operation in the pause mode when operation I the heating mode is resumed.
  • an aerosol-generating device comprising a controller configured to control a heater for heating an aerosol-forming substrate in order to generate an aerosol.
  • the controller is configured to selectively operate in a heating mode in which the controller controls the heater according to a heating mode temperature profile for generating an aerosol, and in a pause mode in which the controller controls the heater according to a pause mode temperature profile for pausing operation in the heating mode.
  • the controller is configured to control the heater to resume operation in the heating mode starting with a temperature boost phase.
  • the boost phase is designed such that a temperature of the heater during operation in the temperature boost phase is higher than an initial temperature level at the beginning of the heating mode temperature profile, more particularly an initial temperature level at the beginning of the heating mode temperature profile subsequent to a possible operation in a preparation mode as described further above; and/or higher than a temperature level in the heating mode before activation of the pause mode.
  • a temperature of the heater during operation in the temperature boost phase preferably is higher by at least 10 °C, in particular by at least 30 °C, more particularly by at least 40 °C, especially by at least 50 °C, than an initial temperature level at the beginning of the heating mode temperature profile, more particularly an initial temperature level at the beginning of the heating mode temperature profile subsequent to a possible operation in a preparation mode; and/or than a temperature level in the heating mode before activation of the pause mode.
  • a temperature of the heater during operation in the temperature boost phase preferably is higher than during operation in the heating mode immediately before operation in the pause mode.
  • a temperature of the heater during operation in the temperature boost phase may be higher by at least 10 °C, in particular by at least 30 °C, more particularly by at least 40 °C, especially by at least 50 °C, than during operation in the heating mode immediately before operation in the pause mode.
  • the temperature boost phase primarily may be used to provide a proper first puff after resumption of the user experience, and thus can be followed by operation at lower temperatures. Continuing at a lower temperature after the temperature boost phase may help to avoid excessive depletion of the substrate and to reduce energy consumption. Accordingly, the temperature during operation in the temperature boost phase preferable may be higher than during subsequent operation in the heating mode after the temperature boost phase; or vice versa, the temperature during subsequent operation in the heating mode immediately after the temperature boost phase may be lower than during operation in the temperature boost phase.
  • a temperature of the heater during operation in the temperature boost phase is higher by at least 10 °C, in particular by at least 30 °C, more particularly by at least 40 °C, especially by at least 50 °C, than during subsequent operation in the heating mode immediately after the temperature boost phase.
  • the temperature of the heater during operation in the temperature boost phase is substantially the same as the temperature in the subsequent operation in the heating mode immediately after the temperature boost phase.
  • the temperature during operation in the temperature boost phase is equal to the temperature during subsequent operation in the heating mode immediately after the temperature boost phase, in particular immediately after the temperature boost phase. This may be the case for long durations of operation in the pause mode and/or for user experiences being paused at a late stage in the heating mode temperature profile, where immediately before the pause the temperature level may already be increased, especially to the maximum possible, as compared to the initial temperature level at the beginning of the heating mode temperature profile.
  • the temperature boost phase has a finite length in terms of time, that is a finite duration.
  • the duration of the temperature boost phase may be adaptable.
  • the controller may be configured to adapt a duration of the temperature boost phase, in particular depending on an operation history during operation in the heating mode prior to operation in the pause mode and/or on a duration of operation in the pause mode.
  • the controller may be configured to adapt a duration of the temperature boost phase so that the duration is increased with an increasing number of puffs during operation in the heating mode prior to operation in the pause mode and/or with an increasing time period of operation in the heating mode prior to operation in the pause mode.
  • the controller may be configured to adapt a duration of the temperature boost phase so that the duration is increased with an increasing duration of operation in the pause mode.
  • the duration of the temperature boost phase may be fixed, that is, the temperature boost phase may have a fixed duration.
  • the duration of the temperature boost phase may be zero, if the duration of operation in the pause mode is below a pre-defined threshold pause mode duration.
  • the controller may be configured to determine the duration of the temperature boost phase to be zero, if the duration of operation in the pause mode is below a pre-defined threshold pause mode duration.
  • the pre-defined threshold pause mode duration may be in a range between 0 seconds and 40 seconds, in particular between 15 seconds and 30 seconds.
  • the operation history during operation in the heating mode prior to operation in the pause mode may be the dominant factor, in particular the only factor, in adapting the duration of the temperature boost phase.
  • the duration of operation in the pause mode may have less or even no influence thereon.
  • the duration of the temperature boost phase may be constant, i.e. always the same, for any duration of operation in the pause mode larger than the aforementioned pre-defined threshold pause mode duration.
  • the duration of the temperature boost phase may be in or may be adaptable in a range between 1 second and 90 seconds, in particular between 5 seconds and 90 seconds, more particularly between 15 seconds and 60 seconds, even more particularly in a range between 15 seconds and 50 seconds, preferably between 20 seconds and 50 seconds or between 20 seconds and 30 seconds.
  • the controller may also be configured to control a temperature of the heater during operation in the temperature boost phase.
  • the temperature of the heater during operation in the temperature boost phase is fixed or constant (non-adaptable), that is, at a fixed or constant (non-adaptable) boost temperature level.
  • the controller may be configured to control a temperature of the heater during operation in the temperature boost phase at a constant boost temperature level. This may be particularly advantageous when the aerosol-forming substrate to be heated comprises no tobacco material, i.e.
  • the temperature of the heater during operation in the temperature boost phase may be chosen such that the corresponding value of the monitored property of the heater at this temperature corresponds to the value of the property at the first specific temperature (first reference temperature) plus 80% to 85% of the difference between the respective values of the property at the first and second specific temperatures (first and second reference temperatures).
  • the difference may be either positive or negative, depending on which one of the respective values of the property at the first and second specific temperatures is higher.
  • the controller may be configured to adapt a boost temperature level so that the boost temperature level corresponds to a maximum temperature reachable by the heater during the heating mode, if the number of puffs during operation in the heating mode prior to operation in the pause mode is equal to or above a pre-defined threshold number and/or if the time period of operation in the heating mode prior to operation in the pause mode is equal to or above a pre-defined threshold time.
  • the pre-defined threshold number of puffs may be in a range between 4 and 8, for instance 6.
  • the pre-defined threshold time of operation in the heating mode prior to operation in the pause mode may be in a range between 2 minutes and 8 minutes, in particular 3 minutes and 4 minutes, for instance 3.5 minutes.
  • the absolute temperature of the heater during operation in the temperature boost phase may in particular dependent on the substrate type.
  • the temperature of the heater during operation in the temperature boost phase in particular the boost temperature level, may be in or may be adaptable in a range between 300 °C and 500 °C, in particular between 375 °C and 400 °C, preferably around 390 °C.
  • These values have proven particularly advantageous for aerosol-forming substrates comprising tobacco material or a combination of tobacco material and other botanical material(s), and/or for aerosol-forming substrates comprising a total aerosolformer content that is lower than 30 percent by weight, in particular lower than 25 percent by weight, preferably lower than 20 percent by weight, and/or for aerosol-forming substrates having a lower thermal mass.
  • the temperature of the heater during operation in the temperature boost phase in particular the boost temperature level, may be in or may be adaptable in a range between 250 °C and 400 °C, in particular between 250 °C and 300 °C, more particularly between 260 °C and 275 °C, for example 270 °C.
  • the aerosol-generating device may generally need some time to thermally prepare the aerosol-forming substrate for a proper first user puff of the resumed user experience. It was found that the time to prepare the substrate may strongly depend on the operation history during operation in the heating mode prior to operation in the pause mode and/or on the duration of operation in the pause mode. Accordingly, it is proposed that operation in the heating mode is resumed by activating the heater to reheat the substrate for aerosol generation over a variable reheating time, wherein the controller is configured to determine the reheating time depending on an operation history during operation in the heating mode prior to operation in the pause mode and/or a duration of operation in the pause mode.
  • an aerosol-generating device comprising a controller configured to control a heater for heating an aerosol-forming substrate in order to generate an aerosol.
  • the controller is configured to selectively operate in a heating mode in which the controller controls the heater according to a heating mode temperature profile for generating an aerosol, and in a pause mode in which the controller controls the heater according to a pause mode temperature profile for pausing operation in the heating mode.
  • the controller In response to termination of operation in the pause mode the controller is configured to resume operation in the heating mode by activating the heater to reheat the substrate for aerosol generation over a variable reheating time, wherein the controller is configured to determine the reheating time depending on an operation history during operation in the heating mode prior to operation in the pause mode and/or a duration of operation in the pause mode.
  • variable reheating time either as independent aspect of the present invention, or in combination with any other aspect of the present invention disclosed herein.
  • the controller may be configured to adapt the reheating time so that the reheating time is increased with an increasing number of puffs during operation in the heating mode prior to operation in the pause mode and/or with an increasing time period of operation in the heating mode prior to operation in the pause mode.
  • the controller may be configured to adapt the reheating time so that the reheating time is increased with an increasing duration of operation in the pause mode.
  • the reheating time may have a fixed value, for example, in a range between 2 seconds and 10 seconds, in particular between 4 seconds and 8 seconds, preferably 5 seconds.
  • the operation history during operation in the heating mode prior to operation in the pause mode may be the dominant factor, in particular the only factor, in adapting the reheating time.
  • the duration of operation in the pause mode may have less or even no influence thereon.
  • the reheating time may be constant, i.e. always the same, for any duration of operation in the pause mode larger than the aforementioned pre-defined threshold pause mode duration.
  • the controller may be configured to notify, via the indicator, that a user is permitted to resume puffing to generate aerosol from the device and/or that the variable reheating time has ended.
  • the controller may be configured to indicate to a user, via the indicator, a remaining time before the variable reheating time is ended.
  • the indicator may comprise at least one of a visual indicator, for example a display or a light signal, such as, one or more LEDs, a haptic indicator (haptic output unit), an audio indicator (audio output unit), and an audiovisual indicator.
  • a visual indicator for example a display or a light signal, such as, one or more LEDs, a haptic indicator (haptic output unit), an audio indicator (audio output unit), and an audiovisual indicator.
  • operation in the heating mode may be resumed by starting with a temperature boost phase.
  • Further details and aspects of the temperature boost phase have been described further above and equally apply to the presently discussed aspect of the invention, that is, the reheating time.
  • the temperature boost phase in particular the duration of the temperature boost phase, and the reheating time are independent from each other. Accordingly, the duration of the temperature boost phase may be shorter than the reheating time. Hence, upon termination of operation in the pause mode a user would take a first puff after the temperature boost phase has ended.
  • the reheating time may nevertheless be non-zero, in particular may have a fixed value, for example, in a range between 2 seconds and 10 seconds, in particular between 4 seconds and 8 seconds, preferably 5 seconds.
  • the reheating time may be shorter than a duration of the temperature boost phase, in which case the user would take a first puff after termination of operation in the pause mode during the temperature boost phase.
  • the temperature boost phase is applied for the reheating time. That is, the reheating time may be as long as the duration of the temperature boost phase. This is particularly advantageous when the temperature during the boost phase is close to or at a maximum temperature reachable by the heater during the heating mode in order to avoid overheating.
  • the reheating time is dependent from the duration of the temperature boost phase, i.e. coupled to the duration of the temperature boost phase, in particular such that the reheating time is a pre-defined function of the duration of the temperature boost phase, in particular such that the reheating time is always as long as the duration of the temperature boost phase.
  • the latter configuration is particularly advantageous when the temperature during the boost phase is close to or at a maximum temperature reachable by the heater during the heating mode in order to avoid overheating.
  • the position in the heating mode temperature profile at which the temperature of the heater restarts after termination of operation in the pause mode (and after an initial temperature boost) may have a significant impact on the quality of the first puff after resumption of the user experience.
  • the temperature of the heater after the pause mode (and after the initial temperature boost) should ideally restart at about the same temperature level as at the time of pausing operation in the heating mode, yet shifted in the heating mode temperature profile by a variable time offset that depends on an operation history during operation in the heating mode prior to operation in the pause mode and/or on a duration of operation in the pause mode. In general, it is however also possible that there is no shift.
  • an aerosol-generating device comprising a controller configured to control a heater for heating an aerosol-forming substrate in order to generate an aerosol.
  • the controller is configured to selectively operate in a heating mode in which the controller controls the heater according to a heating mode temperature profile for generating an aerosol, and in a pause mode in which the controller controls the heater according to a pause mode temperature profile for pausing operation in the heating mode.
  • the controller In response to termination of operation in the pause mode, the controller is configured to resume operation in the heating mode by resuming operation at a shifted position in the heating mode temperature profile which corresponds to a position in the heating mode temperature profile at the time of pausing operation in the heating mode shifted by a variable time offset.
  • the controller is configured to determine the time offset depending on an operation history during operation in the heating mode prior to operation in the pause mode and/or on a duration of operation in the pause mode.
  • variable time offset either as independent aspect of the present invention, or in combination with any other aspect of the present invention disclosed herein.
  • the offset time may be associated with a time shift backwards in the heating mode temperature profile and/or with a time shift forward in the heating mode temperature profile.
  • the controller may be configured to determine the time offset depending on a number of puffs during operation in the heating mode prior to operation in the pause mode and/or a time period of operation in the heating mode prior to operation in the pause mode.
  • the time offset may be in a range between 0 seconds (no shift) and 180 seconds or between 1 second and 180 seconds, in particular between 1 second and 100 seconds, more particularly in a range between 1 second and 7 seconds or between 10 seconds and 80 seconds or between 20 seconds and 70 seconds or between 30 seconds and 70 seconds backwards and/or forward in the heating mode temperature profile.
  • the duration of the temperature boost phase and the time offset are independent from each other.
  • the temperature boost phase and the operation phase starting at the shifted position in the heating mode temperature profile may be consecutive operation phases.
  • the controller may be configured to control the heater to resume operation in the heating mode by starting with a temperature boost phase before resuming operation at the shifted position in the heating mode temperature profile, in particular before resuming operation over the variable remaining time according to the profile section of the heating mode temperature profile being effective at the time of pausing operation in the heating mode.
  • the heating arrangement may be a resistive heating arrangement.
  • the resistive heating arrangement may comprise a resistive heating element as the heater. That is, in this configuration, the resistive heating element corresponds to the heater that is controlled by the controller of the device.
  • the resistive heating element may be, for example, a resistive heating wire or a resistive heating coil or a resistive heating track (in particular a resistive heating track provided on a heating blade), a resistive heating grid or a resistive heating mesh.
  • the resistive heating element may be in thermal contact with or thermal proximity to the aerosol-forming substrate to be heated.
  • the at least one induction coil may be a helical coil or flat planar coil, in particular a pancake coil or a curved planar coil.
  • the at least one induction coil may be held within one of a main body or a housing of the aerosol-generating device.
  • the induction source comprises a DC/AC converter connected to the DC power supply including an LC network, wherein the LC network comprises a series connection of a capacitor and the inductor.
  • the induction source may comprise a matching network for impedance matching.
  • the induction source comprise may comprise a power amplifier, for example a Class-C power amplifier or a Class-D power amplifier or Class-E power amplifier.
  • the aerosol-generating device may further comprise a flux concentrator arranged and configured to distort the varying magnetic field of the at least one inductive source towards the location the susceptor is arranged at in use.
  • the flux concentrator comprises a flux concentrator foil, in particular a multi-layer flux concentrator foil.
  • the aerosol-generating device may comprise a power supply, in particular a DC power supply for providing power to operate the device, in particular for providing power to the heater.
  • the power supply is a battery such as a lithium iron phosphate battery.
  • the power supply may be another form of charge storage device such as a capacitor.
  • the power supply may require recharging, that is, the power supply may be rechargeable.
  • the power supply may have a capacity that allows for the storage of enough energy for one or more user experiences.
  • the power supply may have sufficient capacity to allow for a predetermined number of puffs or discrete activations of the heater.
  • the aerosol-generating device is a puffing device for generating an aerosol that is directly inhalable by a user thorough the user's mouth.
  • the aerosol-generating device is a hand-held aerosol-generating device.
  • the present disclosure further relates to an aerosol-generating system which comprises an aerosol-generating device according to the present invention and as described herein and an aerosol-generating article an aerosol-generating article including an aerosol-forming substrate for use with the device.
  • the term "aerosol-generating system” refers to the combination of an aerosol-generating article as further described herein and an aerosol-generating device according to the invention and as described herein. In the system, the article and the device may cooperate to generate an inhalable aerosol.
  • the term "aerosol-generating article” refers to an article comprising at least one aerosol-forming substrate that, when heated, releases volatile compounds that can form an aerosol.
  • the aerosol-generating article comprises an aerosol-forming substrate that is intended to be heated rather than combusted in order to release volatile compounds that can form an aerosol.
  • the aerosol-generating article may be a consumable, in particular a consumable to be discarded after a single use.
  • the article be a rodshaped article resembling conventional cigarettes.
  • the article may be a cartridge including a liquid aerosol-forming substrate to be heated.
  • the article may be an article including a solid aerosol-forming substrate, in particular a tobacco containing aerosolforming substrate.
  • aerosol-forming substrate relates to a substrate capable of releasing volatile compounds that can form an aerosol when heated.
  • the aerosol-forming substrate may be a solid aerosol-forming substrate or a gel-like aerosol-forming substrate or a liquid aerosol-forming substrate or a combination thereof.
  • the aerosol-forming substrate may be tobacco-containing aerosol-forming substrate. That is, the aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavor compounds, which are released from the substrate upon heating.
  • the aerosol-forming substrate may comprise tobacco particles, in particular tobacco powder.
  • the aerosol-forming substrate may have a total tobacco content of at least 70 percent by weight, in particular at least 75 percent by weight.
  • the aerosol-forming substrate may comprise a non-tobacco material.
  • the aerosol-forming substrate may comprise substantially no tobacco material, such as less than 1% by weight tobacco material.
  • the aerosol-forming substrate may be a non-tobacco aerosol-forming substrate, i.e., the aerosol-forming substrate may comprise no tobacco material or may contain no detectable amount of added tobacco particulate material.
  • the aerosol-forming substrate may be a cellulose based aerosol-forming substrate as described in W02020/207733 and/or WO2022/074157.
  • the aerosol-forming substrate may comprise one or more cellulose based agents.
  • the one or more cellulose based agents may include one or more cellulose based film forming agents, cellulose based strengthening agents, cellulose based binders, and combinations thereof.
  • Suitable cellulose based film forming agents include those selected from the group consisting of hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), ethylcellulose (EC), hydroxyethyl methyl cellulose (HEMC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC) and combinations thereof.
  • the aerosol-forming substrate may further comprise one or more aerosol formers.
  • suitable aerosol formers are 1 ,3-butanediol, glycerin, 1 ,3-propanediol, propylene glycol, triethylene glycol, glycerol monoacetate, glycerol diacetate, glycerol triacetate, dimethyl dodecanedioate and dimethyl tetradecanedioate.
  • the aerosol former is glycerine.
  • the aerosol-forming substrate may comprise a total aerosol-former content that is greater than 10 percent by weight, in particular greater than 20 percent by weight.
  • the aerosol-forming substrate may comprise a total aerosol-former content that is lower than 30 percent by weight, in particular lower than 25 percent by weight, preferably lower than 20 percent by weight. These values are particularly applicable for aerosol-forming substrates containing tobacco material, i.e. tobacco containing aerosol-forming substrates. Vice versa, the aerosol-forming substrate may comprise a total aerosol-former content that is greater than or equal 30 percent by weight, in particular greater than 35 percent by weight, more particularly greater than 40 percent by weight or greater than 45 percent by weight. The latter values are particularly advantageous for aerosol-forming substrates comprising no tobacco material, i.e. for non-tobacco aerosol-forming substrates.
  • the aerosol-forming substrate may be a non-tobacco aerosol-forming substrate comprising one or more cellulose based agents, preferably with a total cellulose based agent content of at least 35 percent by weight.
  • the substrate may further comprise one or more aerosol formers, preferably with a total aerosol-former content that is greater than or equal to 30 percent by weight.
  • the substrate may comprise nicotine.
  • the substrate may further comprise one or more carboxylic acids selected from fumaric acid, maleic acid and malic acid, preferably a total carboxylic acid content of at least 0.5 percent by weight.
  • the substrate according to this example may be a substrate having a higher thermal mass.
  • the aerosol-forming substrate may also be a paste-like material, a sachet of porous material comprising aerosol-forming substrate, or, for example, loose tobacco mixed with a gelling agent or sticky agent, which could include a common aerosol former such as glycerin, and then is compressed or molded into a plug.
  • the susceptor is part of the aerosol-generating device (forming the heater controlled by the controller of the device).
  • the susceptor may be arranged in the device such that it is in thermal proximity to or thermal contact with the aerosol-forming substrate, when the article is engaged with the device.
  • the present disclosure further relates to a method of operating an aerosol-generating system, in particular an aerosol-generating system according to the present invention, capable of generating an aerosol by heating an aerosol-forming substrate.
  • the method comprises selectively operating the system in a heating mode in which the temperature of a heater used for heating the substrate is controlled according to a heating mode temperature profile for generating an aerosol, and in a pause mode in which the temperature of the heater is controlled according to a pause mode temperature profile for pausing operation in the heating mode, wherein the pause mode temperature profile is adapted depending on an operation history during operation in the heating mode prior to operation in the pause mode and/or on a duration of operation in the pause mode.
  • the present disclosure further relates to a method of operating an aerosol-generating system, in particular an aerosol-generating system according to the present invention, capable of generating an aerosol by heating an aerosol-forming substrate.
  • the method comprises selectively operating the system in a heating mode in which the temperature of a heater used for heating the substrate is controlled according to a heating mode temperature profile for generating an aerosol, and in a pause mode in which the temperature of the heater is controlled according to a pause mode temperature profile for pausing operation in the heating mode, wherein in response to termination of operation in the pause mode, operation in the heating mode is resumed by starting with a temperature boost phase, wherein a temperature of the heater during operation in the temperature boost phase is higher than an initial temperature level at the beginning of the heating mode temperature profile and/or higher than a temperature level in the heating mode before activation of the pause mode.
  • Example Ex5 The aerosol-generating device according to any one of the preceding examples, wherein the controller is configured to adapt the pause mode temperature profile such that a progression of a decrease of the operation temperature of the heater is adapted depending on the operation history during operation in the heating mode prior to operation in the pause mode.
  • Example Ex6 The aerosol-generating device according to any one of the preceding examples, wherein the controller is configured to adapt the pause mode temperature profile such that a decrease of the operation temperature of the heater is less progressive with an increasing number of puffs during operation in the heating mode prior to operation in the pause mode and/or with an increasing time period of operation in the heating mode prior to operation in the pause mode.
  • Example Ex7 The aerosol-generating device according to any one of the preceding examples, wherein the controller is configured to adapt the pause mode temperature profile such that an operation temperature of the heater is decreased in successive temperature steps as the duration of operation in the pause mode progresses.
  • Example Ex12 The aerosol-generating device according to any one of examples Ex7 to Ex11 , wherein the controller is configured to adapt a respective time period of the successive temperature steps such that a respective time period of the successive temperature steps increases with an increasing number of puffs during operation in the heating mode prior to operation in the pause mode and/or with an increasing time period of operation in the heating mode prior to operation in the pause mode.
  • Example Ex17 The aerosol-generating device according to any one of examples Ex13 to Ex16, wherein the controller is configured to adapt the pause mode temperature profile such that an increase of the operation temperature of the heater is less progressive with an increasing number of puffs during operation in the heating mode prior to operation in the pause mode and/or with an increasing time period of operation in the heating mode prior to operation in the pause mode.
  • Example Ex19 The aerosol-generating device according to example Ex18, wherein during the increase an increment of the operation temperature of the heater between successive temperature steps is in a range between 2 °C and 25 °C, in particular between 5 °C and 20 °C, more particularly between 7 °C and 15 °C, for example 10 °C.
  • Example Ex21 The aerosol-generating device according to any one of examples Ex18 to Ex20, wherein during the increase a respective time period of the successive temperature steps increases from temperature step to temperature step.
  • Example Ex24 The aerosol-generating device according to example Ex23, wherein the pre-defined threshold number of puffs is in a range between 6 and 10, in particular between 7 and 9, for instance 8; and/or wherein the pre-defined threshold time of operation in the heating mode prior to operation in the pause mode is in a range between 2 minutes and 8 minutes, in particular 4 minutes and 7 minutes, for instance 5 minutes.
  • Example Ex25 The aerosol-generating device according to any one of the preceding examples, wherein the heating mode temperature profile and the pause mode temperature profile are chosen such that an operation temperature of the heater during operation in the pause mode is lower than during operation in the heating mode.
  • Example Ex27 The aerosol-generating device according to any one of the preceding examples, wherein the device comprises a user interface operatively coupled with the controller enabling a user to initiate and/or resume and/or terminate operation in the pause mode.
  • Example Ex28 The aerosol-generating device according to any one of the preceding examples, wherein operation in the pause mode has a defined total duration, in particular for a single user experience and/or for a single pause of operation in the heating mode.
  • Example Ex39 The aerosol-generating device according to example Ex36, wherein the heating arrangement is an induction heating arrangement.
  • Example Ex43 The aerosol-generating system according to example Ex42, wherein the aerosol-forming substrate is a solid aerosol-forming substrate, in particular a tobacco containing aerosol-forming substrate.
  • Example Ex44 An aerosol-generating system according to any one of examples Ex42 to Ex43, comprising an aerosol-generating device according to any one of examples Ex39 to Ex40, wherein the aerosol-generating article comprises a susceptor as the heater.
  • Fig. 1 schematically illustrates an aerosol-generating system according to an exemplary embodiment of the present invention, including an aerosolgenerating device and an aerosol-generating article for use with the device;
  • Fig. 2 shows an exemplary embodiment of a method for operating the aerosolgenerating device according to Fig. 1 ;
  • Figs. 9-12 include various diagrams showing the evolution of the operation temperature versus time during the sequence of operation in different modes for usage with an aerosol-forming substrate of a second type.
  • the distal front plug element 80, the substrate element 20 and the first tube element 40 are circumscribed by a first wrapper, whereas the second tube element 50 and the filter element 60 are circumscribed by a second wrapper.
  • the second wrapper also circumscribes at least a portion of the first tube element 40 (after being wrapped by the first wrapper) to connect the distal front plug element 80, the substrate element 20 and the first tube element 40 being circumscribed by the first wrapper to the second tube element 50 and the filter element 60.
  • the first and the second wrapper are made of paper.
  • the second wrapper may comprise perforations around its circumference (not shown).
  • the wrappers may further comprise adhesive that adheres the overlapped free ends of the wrappers to each other.
  • the heating arrangement 110 includes an induction source 115 and an induction coil 118 for generating an alternating, in particular high-frequency magnetic field within the cavity 103.
  • the induction coil 118 is a helical coil which is arranged in the proximal portion 102 of the device such as to circumferentially surround the cylindrical receiving cavity 103.
  • the "heating mode” refers to the normal operation of the device for aerosol generation in which the controller controls the heater 30 according to a heating mode temperature profile in order to heat the aerosol-forming substrate 21 at a temperature at or above the volatilization temperature of aerosol-forming material included in the substrate 21.
  • the "pause mode” refers to an operational mode of the controller 160 for pausing operation in the heating mode, in which the controller 160 controls the heater 30 according to a pause mode temperature profile that is associated with temperatures at which aerosol generation does not take place, or at least is reduced to a lower or minimum level.
  • the aerosol-forming substrate 21 in the article 10 is heated from room temperature T3 until reaching a first temperature level T1 at time ti.
  • operation of the controller 160 changes from operation in the preparation mode PCM into operation in the heating mode HM in which the temperature T of the heater 30 is controlled according to the heating mode temperature profile.
  • the system is ready for the user experience to by started with the fresh article 10, and a user can take the first puff.
  • the first temperature level T1 reached after operation in the preparation mode PCM corresponds to the initial temperature level of the heater 30 at the beginning of the heating mode temperature profile.
  • the initial temperature level is chosen sufficient to vaporize the aerosol-forming substrate 21 in order to form an aerosol.
  • the initial temperature level may be in a range between 325 °C and 385 °C, particularly between 340 °C and 370 °C, more particularly between 350 °C and 360 °C.
  • a user may to take a certain number of puffs at his or her discretion until he or she may decide to interrupt the user experience.
  • the user takes two puffs (indicated by the doted curved lines) and subsequently decides at time t2 to interrupt the user experience temporarily.
  • This pause may be initiated, for example, by a user input via a user interface, for instance by pressing again the user button 165.
  • the aerosol-generating device 100 may comprise a motion sensor 166 for detecting a movement of the device 100.
  • the motion sensor 166 may, for example, detect that the aerosol-generating device 100 is not moved for certain time which might be indicative of the device 100 being unused, for example, since the device 100 is lying idle on a table. As a consequence, the motion sensor 166 may output a sensor signal indicative of the user experience to be paused.
  • the controller 160 changes from operating in the heating mode HM to operation in the pause mode PM according to the pause mode temperature profile.
  • the pause mode temperature profile is associated with temperatures at which aerosol generation does not take place, or at least is reduced to a lower or minimum level.
  • the temperatures of the heater 30 during operation in the pause mode PM may be in a range between 160 °C and 280 °C.
  • the initial temperature level T2 is about 260 °C (measured the center of main surface of the strip-shaped susceptor 31 as indicated by cross 34). This temperature is sufficiently low to minimize depletion of the substrate 21 , but still high enough to prevent vaporized substances in the cavity 103 from condensation.
  • the number of puffs during operation in the heating mode HM prior to operation in the pause mode is two
  • the time period thpp of operation in the heating mode HM prior to operation in the pause mode PM corresponds to the time span between time h (end of operation in preparation mode PCM/initial start of operation in the heating mode HM) and time t2 (initiation of operation in the pause mode PM).
  • the parameters belonging to the operation history in particular the number of puffs during operation in the heating mode prior to operation in the pause mode, and the time period th PP of operation in the heating mode prior to operation in the pause mode, as well as the duration PD of operation in the pause mode may be determined and/or recorded by the controller 160, as described further above.
  • the controller 160 is further configured to adapt the pause mode temperature profile such that a decrease of the operation temperature of the heater 30 is less progressive with an increasing number of puffs during operation in the heating mode HM prior to operation in the pause mode or with an increasing time period th PP of operation in the heating mode prior to operation in the pause mode, respectively.
  • the temperature values given further above with respect to the operation temperature of the heater refer to the temperature as measured at a geometrical center point of a main surface of the heater, marked by cross 34 in Fig. 1 , or as averaged along a geometrical center line on a main surface of the heater. In general, these temperature values are slightly higher than the one measured at an edge of the same main surface.
  • the lower curve in each diagram of Fig. 3 - Fig. 6 represents the temperature of the aerosol-forming substrate 21 versus time as measured at half of the radius of the circular cylindrical substrate element 20 of the article 10 shown in Fig. 1 (position marked by cross 23 in Fig. 1).
  • the diagrams of Fig. 3 show the time evolution of the operation temperature T during sequential operation in the different modes for a user experience that is paused after 2 puffs in each diagram, but resumed after different durations PD of operation in the pause mode, as indicated at the top of each diagram.
  • the diagrams in each of Fig. 4, Fig. 5 and Fig. 6 show the time evolution of the operation temperature T for different durations PD of operation in the pause mode, wherein the diagrams of Fig. 4 refer to a user experience that is paused after 4 puffs, the diagrams of Fig. 5 refer to a user experience that is paused after 6 puffs, and the diagrams of Fig. 6 refer to a user experience that is paused after 7 puffs.
  • the temperature decrease can be made less progressive in favor of a faster resumption of the user experience, the further the user experience has progressed prior to pausing it.
  • the number of temperature steps decreases. For instance, if the number of puffs before the pause is greater than 4, or 5 or 6, the pause mode temperature profile may only comprise two or even a single temperature step (see Fig. 5 and Fig. 6).
  • the adaptable pause mode temperature profile according to the present embodiment is in general such that the decrease of the operation temperature of the heater 30 is continued until the end of operation in the pause mode PM (unless - due to the operation history - the progression of the decrease is not retarded to such an extent that hardly or no decrease of the operation temperature of the heater takes place during operation in the heating mode, as in Fig. 5 and Fig. 6).
  • the pause mode temperature profile may be such that the decrease of the operation temperature of the heater stops after a pre-defined time of operation in the pause mode, in particular a pre-defined decrease time period, and/or a predefined number of temperature steps, and that subsequently the operation temperature of the heater is kept constant until the end of operation in the pause mode.
  • Fig. 7 - Fig. 8 show alternative pause mode temperature profiles, where the diagrams for different pause durations PD in Fig. 7 refer to a user experience that is paused after 4 puffs, and the diagrams for different pause durations PD in Fig. 8 refer to a user experience that is paused after 6 puffs.
  • the pause mode temperature profiles in Fig. 7 and Fig. 8 are such that after decreasing the operation temperature over a pre-defined decrease time period DT an operation temperature T of the heater 30 is progressively increased in successive temperature steps as the duration of operation in the pause mode PM further progresses. Accordingly, the pause mode temperature profiles in Fig. 7 and Fig.
  • the decrease time period DT may be fixed.
  • the controller 160 may be configured to adapt the decrease time period DT depending on the operation history during operation in the heating mode prior to operation in the pause mode.
  • the decrease time period DT may be adaptable in a range between range between 15 seconds and 6 minutes, in particular 3 minutes and 5 minutes, more particularly between 3.5 minutes and 4.5 minutes.
  • a respective time period of the successive ascending temperature steps may be either fixed or adaptable, especially adaptable depending on the operation history during operation in the heating mode prior to operation in the pause mode.
  • a progression of the (re-)increase of the operation temperature T of the heater 30 may depend on the operation history during operation in the heating mode prior to operation in the pause mode.
  • the controller 160 may be configured to adapt the pause mode temperature profile such that an increase of the operation temperature of the heater is less progressive with an increasing number of puffs during operation in the heating mode prior to operation in the pause mode and/or with an increasing time period th PP of operation in the heating mode prior to operation in the pause mode.
  • the respective time period of the successive ascending temperature steps may be adapted such that it gets longer with an increasing number of puffs during operation in the heating mode prior to operation in the pause mode as can be seen from a comparison of the different diagrams in Fig. 7 and Fig. 8 for equal duration PD of operation in the pause mode PM.
  • the controller 160 may be configured to adapt the pause mode temperature profile such that an operation temperature of the heater is kept constant depending on the operation history, for instance, if the number of puffs during operation in the heating mode prior to operation in the pause mode is equal to or above a pre-defined threshold number. This is shown in Fig. 6, where the temperature of the heater 30 is kept constant when pausing the user experience after 7 puffs, while in Fig. 6, the operation temperature T during operation in the pause mode PM is still reduced in one temperature step, when pausing the user experience after 6 puffs.
  • a change from operation in the pause mode PM back into the heating mode may be initiated, for example, by a user input, preferably via the user button 165.
  • the motion sensor 166 may be used to re-initiate operation in the heating mode, for instance by detecting a movement of the device 100 which might indicate that the user is (again) holding the device 100 and therefore probably about to resume the user experience. Accordingly, the motion sensor 166 may output a sensor signal indicative of the device 100 being or being intended to be in operation again. In response to such as a sensor signal or in response to a signal generated by pressing the user button 165, the controller 160 may be switch from operation in the pause mode PM back into the heating mode HM.
  • the boost phase is designed such that a temperature of the heater 30 during operation in the temperature boost BP phase is higher, for instance by at least 30 °C, than an initial temperature level at the beginning of the heating mode temperature profile subsequent to operation in the preparation mode PCM, as described further above.
  • a temperature of the heater 30 during operation in the temperature boost phase BP preferably is also higher than the temperature of the heater 30 immediately before initiating operation in the pause mode PM as can be seen from the diagrams in of Fig. 2 - Fig. 8.
  • the temperature boost phase BP can be followed by an operation at lower temperatures in order to reduce energy consumption and to avoid excessive depletion of the substrate 21.
  • the temperature boost phase BP may be equal to the temperature during subsequent operation in the heating mode immediately after the temperature boost phase BP.
  • the duration of the temperature boost phase BP may advantageously be adaptable by the controller, in particular depending on the operation history during operation in the heating mode prior to operation in the pause mode and/or on a duration PD of operation in the pause mode.
  • the duration of the temperature boost phase BP is increased with an increasing number of puffs during operation in the heating mode HM prior to operation in the pause mode PM and/or with an increasing time period th PP of operation in the heating mode HM prior to operation in the pause mode and/or with an increasing duration PD of operation in the pause mode PM.
  • the duration of the temperature boost BP phase may be adaptable in a range between 1 second and 90 seconds, in particular between 5 seconds and 90 seconds, more particularly between 15 seconds and 60 seconds, even more particularly in a range between 15 seconds and 50 seconds, preferably between 20 seconds and 50 seconds or between 20 seconds and 30 seconds.
  • the temperature of the heater during operation in the temperature boost phase BP may in principle be adaptable as well, it was found advantageous to have it at a fixed temperature level, denoted as boost temperature level BTL (see Fig. 2).
  • the boost temperature level BTL is as high as possible, that is, at a maximum temperature reachable by the heater.
  • the temperature level of the heater during operation in the temperature boost phase BP may be in a range between 300 °C and 500 °C, in particular between 375 °C and 400 °C, preferably around 390 °C.
  • the reheating time RHT generally defines the time after which a user experience should be resumed at the earliest, it does not preclude that a user experience can be resumed before the reheating time has ended, in particular that a user takes a puff before the reheating time RHT has ended.
  • the reheating time RHT is variable, and as such preferably determined by the controller 160 depending on an operation history during operation in the heating mode prior to operation in the pause mode and/or a duration of operation in the pause mode PM. In general, the further the user experience has progressed prior to pausing it, in particular the greater the number of puffs during operation in the heating mode HM prior to operation in the pause mode PM, the longer the reheating time RHT should be made. Likewise, the reheating time RHT is increased the longer the duration PD of operation in the pause mode has been.
  • the reheating time may be or may be adaptable in a range between 1 second and 90 seconds, in particular between 5 seconds and 60 seconds, more particular in a range between 5 seconds and 50 seconds. These values of the reheating time have proven advantageous to provide a satisfying first user puff.
  • a user upon termination of operation in the pause mode a user would take a first puff after the temperature boost phase BP has ended.
  • the temperature boost phase BP lasts from time ts to time ts
  • the reheating time RHT is longer corresponding to the time span between time ta and time ts.
  • the reheating time RHT may be shorter than a duration of the temperature boost phase BP, in which case the user would take a first puff after termination of operation in the pause mode PM during the temperature boost phase BP.
  • the position in the heating mode temperature profile to which the temperature of the heater 30 re-connects after termination of operation in the pause mode PM may have a significant impact on the quality of the first puff after resumption of the user experience.
  • the temperature of the heater 30 after operation in the pause mode PM should ideally re-connect to about the same temperature level as at the time of pausing operation in the heating mode HM, yet possibly shifted in the heating mode temperature profile by a variable time offset toffset that depends on the operation history during operation in the heating mode prior to operation in the pause mode and/or on the duration PD of operation in the pause mode. As a result, operation in the heating mode is resumed at a shifted position in the heating mode temperature profile.
  • the temperature-versus-time curve after resumption of the heating mode would look like as indicated by the dashed-double dotted profile in Fig. 2.
  • operation in the heating mode is resumed at a shifted position in the heating mode temperature profile which corresponds to a position in the heating mode temperature profile at the time of pausing operation in the heating mode shifted by a variable time offset toffset.
  • the longer the duration PD of operation in the pause mode the greater the time shift forward in the heating mode temperature profile preferably is. Accordingly, as can be seen from a comparison of the various diagrams in Fig. 3 - Fig.
  • the time offset toffset may be in a range between 0 seconds and 180 seconds or between 1 second and 180 seconds, in particular between 1 second and 100 seconds, more particularly in a range between 1 second and 70 seconds or between 10 seconds and 80 seconds or between 20 seconds and 70 seconds or between 30 seconds and 70 seconds backwards and/or forward in the heating mode temperature profile.
  • the effective remaining time tB' may be in a range between 0% and 100 % percent, in particular 0% and 80%, more particularly between 25% and 75% or between 30% and 50% of a calculative remaining time t B .
  • the effective remaining time t B ' may be in a range between 0% and 100% percent, in particular 0% and 80%, more particularly between 25% and 75% or between 30% and 50% of predefined total interval time U + t B of the profile section of the heating mode temperature profile being effective at the time t2 of pausing operation in the heating mode HM.
  • the heating and pause mode temperature profiles may not only depend on operational parameters, such as the operation history, but in general also on the substrate type, in particular on its constituents, the thermal stability of the substrate, the total aerosol-former content, and/or the grammage of the substrate.
  • the substrate type may have an impact on both, the general temperature levels during the various modes and the course of the profiles.
  • the substrate type may even have an influence on whether one or more parameters of the various profiles are adapted, e.g. depending on the operation history, or not.
  • the substrate may be tobacco-containing aerosol-forming substrate comprising tobacco material, such as tobacco particles, in particular tobacco powder, preferably with a total tobacco content of at least 70 percent by weight, in particular at least 75 percent by weight.
  • the substrate may comprise one or more cellulose based agents, such as cellulose fibers, preferably with a total cellulose based agent content of at most 10 percent by weight, in particular at most 5 percent by weight.
  • the substrate may further comprise one or more aerosol formers, preferably with a total aerosol-former content that is lower than 30 percent by weight, more particularly lower than 20 percent by weight.
  • the lower diagrams in each of Fig. 9 - Fig. 12 show various heating and pause mode temperature profiles which are preferably designed for a user experience with an aerosol-forming substrate containing no tobacco material, i.e. for a non-tobacco aerosol-forming substrate, and/or an aerosol-forming substrate having a higher thermal mass, and/or an aerosolforming substrate comprising a total aerosol-former content that is greater than or equal 30 percent by weight, in particular greater than 35 percent by weight, more particularly greater than 40 percent by weight or greater than 45 percent by weight,.
  • the non-tobacco aerosol-forming substrate may comprise one or more cellulose based agents, preferably with a total cellulose based agent content of at least 35 percent by weight.
  • the substrate may further comprise one or more aerosol formers, preferably with a total aerosol-former content that is greater than or equal to 30 percent by weight.
  • the substrate may comprise nicotine.
  • the substrate may further comprise one or more carboxylic acids selected from fumaric acid, maleic acid and malic acid, preferably a total carboxylic acid content of at least 0.5 percent by weight.
  • the lower diagrams in each one of Fig. 9 - Fig. 12 show the time evolution of the operation temperature T of the heater for different durations PD of operation in the pause mode, wherein the lower diagrams of Fig. 9 (Fig. 9-1 - Fig. 9-4) refer to a user experience that is paused after 2 puffs, the lower diagrams of Fig. 10 (Fig. 10-1 - Fig. 10-4) refer to a user experience that is paused after 4 puffs, the lower diagrams of Fig. 11 (Fig. 11-1 - Fig. 11-4) refer to a user experience that is paused after 6 puffs and the lower diagrams of Fig. 12 (Fig. 12-1 - Fig. 12-4) refer to a user experience that is paused after 7 puffs.
  • aerosol-forming substrates containing no tobacco material may typically have a higher total aerosol-former content than tobacco-containing substrates. In general, this requires lower temperatures during the heating mode and the pause mode.
  • the temperature of the heater during operation in the "normal" heating mode i. e. during any phase of the heating mode except for the temperature boost phase, is in a range around 255 °C.
  • the temperature of the heater is in a range around 130 °C.
  • the duration of the temperature boost phase BP always equals the reheating time RHT, i.e. the time required by the aerosolgenerating device to prepare the aerosol-forming substrate for a proper first user puff after the pause.
  • the temperature boost phase always ends at the same time the device is ready for the user to take the first puff after the pause.
  • the controller 160 may generate a signal, e.g. via the LEDs 169 as shown in Fig. 1 , which indicates that the reheating time RHT has ended and that the user is permitted to resume puffing to generate aerosol from the device.
  • the reheating time RHT can be short, e.g. around 5 seconds.
  • the reheating time RHT may also be constant irrespective of the operation history during operation in the heating mode prior to operation in the pause mode, in particular irrespective of the number of puffs during operation in the heating mode HM prior to operation in the pause mode PM.
  • the reheating time RHT/the duration of the temperature boost phase BP is adaptable by the controller 160 such that the reheating time RHT/ the duration of the temperature boost phase BP increases with an increasing number of puffs during operation in the heating mode HM prior to operation in the pause mode PM and/or with an increasing time period of operation in the heating mode HM prior to operation in the pause mode.
  • the reheating time RHT/the duration of the temperature boost phase BP may increase from 22 seconds (for zero or one puff being take before the pause) up to 30 seconds (for four or more puffs being taken before the pause).
  • the operation history during operation in the heating mode prior to operation in the pause mode may be the dominant factor, in particular the only factor, in adapting of the reheating time RHT/the duration of the temperature boost phase BP, whilst the duration of operation in the pause mode PM may have less or even no influence thereon.
  • the reheating time RHT/the duration of the temperature boost phase BP may be constant, i.e. always the same, for any duration of operation in the pause mode PM larger than, for example, 30 seconds.
  • the dashed one of the two lower curves refers to a reheating time/duration of the temperature boost phase BP of about 20 seconds
  • the continuous (non-dashed) one of the two lower curves refers to a longer reheating time/duration of the temperature boost phase BP in a range between 25 seconds and 30 seconds.
  • the glycerin delivery is higher for a longer reheating times/durations of the temperature boost phase BP, i.e. closer to the glycerin delivery of an unpaused user experience.

Landscapes

  • Control Of Resistance Heating (AREA)

Abstract

La présente divulgation concerne un dispositif de génération d'aérosol comprenant un dispositif de commande conçu pour commander un dispositif de chauffage pour qu'il chauffe un substrat de formation d'aérosol afin de générer un aérosol. Le dispositif de commande est conçu pour fonctionner sélectivement dans un mode de chauffage dans lequel le dispositif de commande commande le dispositif de chauffage selon un profil de température de mode de chauffage pour générer un aérosol, et dans un mode pause dans lequel le dispositif de commande commande le dispositif de chauffage selon un profil de température de mode pause pour une opération de pause dans le mode de chauffage. Le dispositif de commande est en outre conçu pour adapter le profil de température de mode pause en fonction d'un historique de fonctionnement pendant le fonctionnement dans le mode de chauffage avant le fonctionnement dans le mode pause et/ou sur une durée de fonctionnement dans le mode pause.
PCT/EP2024/077449 2023-10-03 2024-09-30 Dispositif de génération d'aérosol pouvant fonctionner en mode de libération d'aérosol et en mode pause Pending WO2025073628A1 (fr)

Priority Applications (1)

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CN202480061607.2A CN121925196A (zh) 2023-10-03 2024-09-30 以气溶胶释放模式和以暂停模式可操作的气溶胶生成装置

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EP23201357 2023-10-03
EP23201357.3 2023-10-03

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WO2025073628A1 true WO2025073628A1 (fr) 2025-04-10

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020207733A1 (fr) 2019-04-08 2020-10-15 Philip Morris Products S.A. Substrat de génération d'aérosol comprenant un film de génération d'aérosol
WO2022069582A1 (fr) 2020-09-30 2022-04-07 Philip Morris Products S.A. Dispositif de génération d'aérosol doté d'un moyen d'identification du type d'un article de génération d'aérosol utilisé avec le dispositif
WO2022074157A1 (fr) 2020-10-07 2022-04-14 Philip Morris Products S.A. Substrat de formation d'aérosol
WO2022136661A1 (fr) 2020-12-23 2022-06-30 Philip Morris Products S.A. Système et dispositif de génération d'aérosol comprenant un dispositif de chauffage par induction et procédé de fonctinoneent associé
US20220395028A1 (en) * 2020-02-07 2022-12-15 Kt&G Corporation Aerosol generating device
WO2023285458A1 (fr) 2021-07-12 2023-01-19 Philip Morris Products S.A. Dispositif de génération d'aérosol et système comprenant un dispositif chauffant inductif et son procédé de fonctionnement
WO2023072680A1 (fr) * 2021-10-26 2023-05-04 Nicoventures Trading Limited Dispositif de fourniture d'aérosol
KR20230118004A (ko) * 2022-02-03 2023-08-10 주식회사 이엠텍 스마트 온도제어를 수행하는 에어로졸 발생 장치 및 그 제어 방법
WO2023166150A1 (fr) * 2022-03-03 2023-09-07 Philip Morris Products S.A. Dispositif à fumer à profil de chauffage dynamique

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020207733A1 (fr) 2019-04-08 2020-10-15 Philip Morris Products S.A. Substrat de génération d'aérosol comprenant un film de génération d'aérosol
US20220395028A1 (en) * 2020-02-07 2022-12-15 Kt&G Corporation Aerosol generating device
WO2022069582A1 (fr) 2020-09-30 2022-04-07 Philip Morris Products S.A. Dispositif de génération d'aérosol doté d'un moyen d'identification du type d'un article de génération d'aérosol utilisé avec le dispositif
WO2022074157A1 (fr) 2020-10-07 2022-04-14 Philip Morris Products S.A. Substrat de formation d'aérosol
WO2022136661A1 (fr) 2020-12-23 2022-06-30 Philip Morris Products S.A. Système et dispositif de génération d'aérosol comprenant un dispositif de chauffage par induction et procédé de fonctinoneent associé
WO2023285458A1 (fr) 2021-07-12 2023-01-19 Philip Morris Products S.A. Dispositif de génération d'aérosol et système comprenant un dispositif chauffant inductif et son procédé de fonctionnement
WO2023072680A1 (fr) * 2021-10-26 2023-05-04 Nicoventures Trading Limited Dispositif de fourniture d'aérosol
KR20230118004A (ko) * 2022-02-03 2023-08-10 주식회사 이엠텍 스마트 온도제어를 수행하는 에어로졸 발생 장치 및 그 제어 방법
WO2023166150A1 (fr) * 2022-03-03 2023-09-07 Philip Morris Products S.A. Dispositif à fumer à profil de chauffage dynamique

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