Smoking replacement system

Abstract

A heating tobacco device is described. The apparatus includes a heater and a controller configured to operate the heater according to at least two user-selectable operating modes. The operating mode is selectable by a user via a user input mechanism. The heater is for engagement with a heated tobacco consumable comprising an active component for delivery to the user. The at least two user-selectable operating modes include a first mode in which the heater is operated to deliver a first amount of an active component to the user, and a second mode in which the heater is operated to deliver a second amount of an active component to the user. The second amount of active component is higher than the first amount of active component.

Description

[0001] This application is a divisional application of a Chinese patent application with the application number 202080034620.0, the filing date of March 13, 2020, and the invention title of "Smoking Substitute System". Technical Field

[0002] The present invention relates to a smoking substitute system, and more particularly but not exclusively to a smoking substitute system including a heated tobacco device. Background Art

[0003] Smoking tobacco is generally considered to expose smokers to potentially harmful substances. It is generally believed that a large number of potentially harmful substances are generated by the heat caused by the burning and / or combustion of tobacco and the components of the burned tobacco in the tobacco smoke itself.

[0004] Traditional combustible smoking articles, such as cigarettes, typically include a cylindrical tobacco rod composed of tobacco strands wrapped by a wrapper, and usually also include a cylindrical filter axially aligned and adjacent to the wrapped tobacco rod. The filter typically includes filter material surrounded by a plug wrap. The wrapped tobacco rod and the filter are connected together by a tipping paper that wraps around the entire length of the filter and an adjacent portion of the wrapped tobacco rod. This type of traditional cigarette is used by lighting the end opposite the filter and burning the tobacco rod. The smoker receives the mainstream smoke into their mouth by sucking at the mouth end or filter end of the cigarette.

[0005] It is known that the combustion of organic materials such as tobacco produces tar and other potentially harmful by-products. To avoid smoking tobacco, various smoking substitute systems (or "alternative smoking systems") have been proposed.

[0006] Such smoking substitute systems can form part of a nicotine replacement therapy for people who wish to stop smoking and overcome their dependence on nicotine.

[0007] The smoking substitute system includes an electronic system that allows a user to simulate the act of smoking by generating an aerosol (also known as "vapor"), which is sucked into (inhaled) the lungs through the mouth and then exhaled. The inhaled aerosol typically carries nicotine and / or flavorants, with little or no odor and health risks associated with traditional smoking.

[0008] Generally, smoking substitute systems are designed to provide an alternative to the smoking habit while providing the user with an experience and satisfaction similar to that of experiencing traditional smoking and combustible tobacco products. Some smoking substitute systems use smoking substitute articles (also known as "consumables") that are designed to resemble traditional cigarettes and are in the form of a cylinder with a mouthpiece at one end.

[0009] In the past few years, the popularity and use of smoking replacement systems have grown rapidly. Although initially sold as an aid to help habitual smokers who wish to quit smoking, consumers are increasingly viewing smoking replacement systems as an accessory to a desired lifestyle.

[0010] There are many different types of smoking replacement systems, each using a different smoking replacement method.

[0011] One method for a smoking replacement system is the so-called heated tobacco (“HT”) method, in which tobacco (instead of “e-liquid”) is heated or warmed to release vapor. HT is also referred to as “heat-not-burn” (“HNB”). The tobacco can be tobacco leaves or reconstituted tobacco. The vapor can contain nicotine and / or flavorants. In the HT method, the aim is for the tobacco to be heated but not burned, i.e., the tobacco does not undergo combustion.

[0012] A typical HT smoking replacement system can include a device and a consumable. The consumable can include tobacco material. The device and the consumable can be configured to be physically coupled together. In use, heat can be transferred to the tobacco material through a heating element of the device, where an air flow through the tobacco material causes components in the tobacco material to be released as vapor. The vapor can also be formed by a carrier in the tobacco material (which can include, for example, propylene glycol and / or vegetable glycerin) and other volatile compounds released from the tobacco. The released vapor can be entrained in the air flow drawn through the tobacco.

[0013] When the vapor passes from the vaporization location through the consumable (entrained in the air flow) to the outlet (e.g., nozzle) of the consumable, the vapor cools and condenses to form an aerosol for the user to inhale. The aerosol will typically contain volatile compounds.

[0014] In an HT smoking replacement system, heating rather than burning the tobacco material is considered to result in a small amount or less of the more harmful compounds typically produced during smoking. Thus, the HT method can reduce the odors and / or health risks that can be generated through the incineration, combustion, and pyrolytic degradation of tobacco.

[0015] There is a need to improve the design of smoking replacement systems, particularly HT smoking replacement systems, to enhance the user experience and improve the functionality of HT smoking replacement systems.

[0016] In view of the above considerations, the present disclosure has been designed. Summary of the Invention

[0017] In the most general case, one aspect of the present invention relates to a heated tobacco device for operating in different modes, and another aspect of the present invention relates to a heat-not-burn device for controlling vapor generation.

[0018] According to a first aspect of the present invention, there is provided a heated tobacco device comprising: a heater; a controller configured to operate the heater according to at least two user-selectable operating modes, the operating modes being selectable by the user via a user input mechanism, wherein the heater is for engaging with a heated tobacco consumable, the heated tobacco consumable comprising an active ingredient for delivery to the user; wherein the at least two user-selectable operating modes include: a first mode in which the heater is operated to deliver a first amount of the active ingredient to the user, and a second mode in which the heater is operated to deliver a second amount of the active ingredient to the user, and wherein the second amount of the active ingredient is higher than the first amount of the active ingredient.

[0019] By providing a heated tobacco device including a controller that operates the device in at least two user-selectable modes, the device can operate in an enhanced mode to provide a higher delivery of the active ingredient of the consumable.

[0020] Optional features will now be described. These can be applied individually or in any combination with any aspect.

[0021] Optionally, in the second mode, the controller operates the heater to deliver the active ingredient at a higher rate than in the first mode.

[0022] Optionally, the controller is configured to operate the heater at a first operating temperature in the first mode and at a second operating temperature in the second mode, wherein the second operating temperature is higher than the first operating temperature.

[0023] Optionally, the controller is configured to operate the heater for a first consumable cycle duration in the first mode and for a second consumable cycle duration in the second mode, wherein the second consumable cycle duration is longer than the first consumable cycle duration.

[0024] Optionally, the controller is configured to select from at least two operating modes based on a user default mode.

[0025] Optionally, the controller is configured to allow the user to set the user default mode.

[0026] Optionally, the controller is configured to set the user default mode based on the historical use of the device.

[0027] Optionally, the active ingredient is nicotine.

[0028] Optionally, the device further comprises a consumable detection sensor for detecting the type of the consumable engaged with the heater or for detecting the active ingredient content of the consumable.

[0029] Optionally, the controller is configured to select from at least two operating modes based on the type of the detected consumable or based on the active ingredient content of the detected consumable type.

[0030] Optionally, the user input mechanism includes a button.

[0031] Optionally, the user input mechanism includes a touch screen.

[0032] Optionally, the user input mechanism includes a motion sensor for detecting a predetermined motion of the device.

[0033] Optionally, the user input mechanism includes a voice recognition mechanism.

[0034] Advantageously, the controller is configured to operate the device in a second mode based on the type and / or content of the consumable.

[0035] According to a second aspect of the present invention, there is provided a heat-not-burn device, comprising: a heater; and a controller configured to operate the heater to heat an aerosol-forming substrate engaged with the heater to a predetermined operating temperature, wherein the controller is configured to operate the heater in at least two modes, the at least two modes including a first mode in which a vapor having a first visibility is formed by the aerosol-forming substrate, and a second mode in which a vapor having a second visibility is formed by the aerosol-forming substrate, wherein the first visibility is lower than the second visibility.

[0036] By providing a heat-not-burn device including a controller that controls vapor generation, the device can be operated in two different vapor generation modes. In the first mode, the generated vapor has a lower visibility. Considering that the use of the device becomes less obvious to an external observer due to the low vapor visibility, this mode can also be referred to as the "hidden mode". In the second mode, the visibility of the generated vapor is higher than that in the first mode.

[0037] The benefits of the device operating in the first mode can be increased flavor intensity and increased nicotine intensity. Without wishing to be bound by theory, it is believed that when the device operates in a mode of generating low-visibility vapor, the relative concentrations of nicotine and flavor in the aerosol can be higher. Low-visibility vapor can also be desirable for users who wish to reduce the amount of visible vapor generated for aesthetic purposes (e.g., when in a public place).

[0038] The terms "first visibility" and "second visibility" refer to the visibility of the vapor produced by an aerosol-forming substrate (e.g., an HNB consumable) during smoking, such as the visibility of the vapor subsequently exhaled by a user after inhalation from the aerosol-forming substrate. Such visibility can typically be evaluated by the eye, but can also be evaluated by determining the amount of incident light scattered by the vapor using more precise methods known to those skilled in the art. Vapor with a higher "visibility" as defined herein will scatter or attenuate incident light to a greater extent and thus appear more visible (i.e., "more hazy" or "more foggy") to an observer.

[0039] Optionally, the controller is configured to operate the heater at a first predetermined operating temperature in a first mode and at a second predetermined operating temperature in a second mode, wherein the first predetermined operating temperature is lower than the second predetermined operating temperature.

[0040] When in different modes, the control of the temperature of the heater is a way to provide different vapor visibilities. Without wishing to be bound by theory, it is believed that the different vaporization temperatures of nicotine on the one hand and aerosol-forming substances on the other hand can be used to customize the visibility of the vapor. Selecting a temperature that vaporizes a lower amount of aerosol-forming substances from the aerosol-forming substrate enables a reduction in the amount of vapor produced, thereby reducing its visibility.

[0041] In some embodiments, the first predetermined operating temperature is at least 25°C lower than the second predetermined operating temperature, such as at least 30°C, at least 35°C, at least 40°C, at least 45°C, at least 50°C, at least 55°C, or at least 60°C.

[0042] In some embodiments, the first predetermined operating temperature is from 140°C to 170°C. In this temperature range, an acceptable level of nicotine is vaporized from the aerosol-forming substrate, while the amount of other substances (aerosol-forming substances) that contribute to the visibility of the vapor is reduced.

[0043] In some embodiments, the second predetermined operating temperature is greater than 170°C. In some embodiments, the second predetermined operating temperature is at least 180°C, such as at least 185°C, at least 190°C, at least 195°C, or at least 200°C. In some embodiments, the second predetermined operating temperature is greater than 170°C and less than or equal to about 220°C. In some embodiments, the second predetermined operating temperature is from 175°C to 220°C, such as from 175°C to 215°C, from 175°C to 210°C, from 180°C to 210°C, from 190°C to 210°C, or from 195°C to 205°C. In some embodiments, the second predetermined operating temperature is about 200°C.

[0044] In some embodiments, the first predetermined operating temperature is from 140 °C to 170 °C; and the second predetermined operating temperature is greater than 170 °C and less than or equal to about 220 °C. In some embodiments, the first predetermined operating temperature is from 140 °C to 170 °C; and the second predetermined operating temperature is at least 200 °C.

[0045] In some embodiments, the controller is configured to vary the pressure drop across the consumable. In some embodiments, the controller is configured to vary the pressure drop across the aerosol - forming article between a first condition and a second condition, wherein the pressure drop across the aerosol - forming article is higher under the first condition than under the second condition. The higher pressure drop provides a reduced level of visible vapor from the aerosol - forming article, and thus the first condition corresponds to a first mode of the device.

[0046] In some embodiments, the controller is configured to vary the air flow in order to control the pressure drop based on the selected mode. In some embodiments, the controller is configured to vary the air flow into the device between a first condition and a second condition, wherein the air flow into the device is lower under the first condition than under the second condition.

[0047] In some embodiments, the controller is configured to vary the air flow such that the pressure drop when in the first mode is higher than the pressure drop when in the second mode.

[0048] In some embodiments, the controller is configured to detect the type of consumable present in the device and incorporate it into the parameters of one or more device functions when switching between a first mode and a second mode. In other words, when switching between modes, the actions taken by the controller can depend on the type of consumable present in the device. For example, certain consumables may require a greater temperature reduction between the second and the first mode in order to achieve a given reduction in vapor visibility. Similarly, certain consumables may require a greater increase in pressure drop between the second and the first mode in order to achieve a given reduction in vapor visibility.

[0049] In some embodiments, the device is adapted to move the heater and the aerosol-forming substrate relative to each other so as to change the amount of contact between the heater and the substrate according to a selected mode. Changing the degree of contact between the heater and the aerosol-forming substrate will change the amount of visible vapor generated by the device. A greater amount of contact between the heater and the substrate will increase the amount of vapor generated at a given heater temperature. The movement of the heater relative to the aerosol-forming substrate can be achieved by effecting the movement of the heater, the aerosol-forming substrate, or both. For example, the device can be adapted to move the heater. In some embodiments, the heater is adapted to move linearly along the longitudinal axis of the device such that the degree to which the heater is inserted into the aerosol-forming substrate can be changed. In some embodiments, the device is adapted to move the aerosol-forming substrate relative to the heater to provide more or less contact between the heater and the aerosol-forming substrate as desired.

[0050] Optionally, the amount of contact between the heater and the aerosol-forming substrate in the first mode is less than the amount of contact between the heater and the aerosol-forming substrate in the second mode.

[0051] In some embodiments, the heater is a rod heater adapted to be inserted into the upstream end of the HNB consumable during smoking, and the device is adapted to move the heater and the consumable relative to each other in response to a mode selection to effect a certain degree of insertion of the heater into the upstream end of the consumable. The device can be adapted to move the heater and the consumable closer to each other in response to the selection of the second mode, thereby increasing the visibility of the generated vapor. The device can be adapted to move the heater and the consumable farther from each other in response to the selection of the first mode, thereby reducing the visibility of the generated vapor. In some embodiments, in the second mode, the length of the portion of the heater inserted into the consumable is about 10 mm. In some embodiments, in the first mode, the length of the portion of the heater inserted into the consumable is about 5 mm.

[0052] In some embodiments, the device includes a user input mechanism for the user to select a mode. In some embodiments, the user input mechanism includes a user interface through which the user can select from modes, such as the first mode or the second mode. In some embodiments, the user interface includes one or more buttons or switches for selecting a particular mode.

[0053] In some embodiments, the device further includes an output mechanism configured to indicate to the user the currently selected operating mode (e.g., the first or second mode). The device can include a display for indicating to the user the currently selected mode. For example, the device can include one or more lights (e.g., LEDs) that are lit according to the selected mode, or include a screen indicating the selected mode.

[0054] In some embodiments, the controller is configured to maintain a selected mode during at least one complete smoking cycle (i.e., the time to activate the heater to draw on a single HNB consumable). This ensures that the user obtains the desired smoking experience during the complete cycle and is not interrupted by any unwanted switching between modes.

[0055] The device may include an elongate body. An end of the elongate body may be configured to engage with an aerosol-forming article. For example, the body may be configured to engage with a heated tobacco (HT) consumable (or a heat-not-burn (HNB) consumable). The terms "heated tobacco" and "heat-not-burn" are used interchangeably herein to describe a heat rather than combustion type of consumable (or interchangeably to describe a device for use with such a consumable). The device may include a cavity configured to receive at least a portion of the consumable (i.e., for engaging with the consumable). The aerosol-forming article may be of a type that includes an aerosol precursor (e.g., carried by an aerosol-forming substrate).

[0056] The device may include a heater for heating the aerosol-forming article. The heater may include a heating element, which may be in the form of a rod extending from the body of the device. The heating element may extend from an end of the body configured to engage with the aerosol-forming article.

[0057] The heater (and thus the heating element) may be securely mounted to the body. The heating element may be elongate to define a longitudinal axis and may, for example, have a substantially circular cross-sectional profile (i.e., perpendicular to the longitudinal axis of the heating element) (i.e., the heating element may be generally cylindrical). Alternatively, the heating element may have a rectangular cross-sectional profile (i.e., the heater may be a "blade heater"). Alternatively, the heating element may be in the shape of a tube (i.e., the heater may be a "tubular heater"). The heating element may take other forms (e.g., the heating element may have an oval cross-sectional profile). The shape and / or dimensions (e.g., diameter) of the cross-sectional profile of the heating element may be generally consistent along the entire length (or substantially the entire length) of the heating element.

[0058] The heating element may be 15 mm to 25 mm in length, such as 18 mm to 20 mm in length, such as, about 19 mm in length. The heating element may have a diameter of 1.5 mm to 2.5 mm, such as 2 mm to 2.3 mm in diameter, such as, about 2.15 mm in diameter.

[0059] The heating element can be formed of ceramic. The heating element can include a core (e.g., a ceramic core) containing Al2O3. The diameter of the core of the heating element can be from 1.8 mm to 2.1 mm, such as from 1.9 mm to 2 mm. The heating element can include an outer layer (e.g., an outer ceramic layer) containing Al2O3. The thickness of the outer layer can be from 160 μm to 220 μm, such as from 170 μm to 190 μm, such as about 180 μm. The heating element can include a heating track, which can extend longitudinally along the heating element. The heating track can be sandwiched between the outer layer and the core of the heating element. The heating track can contain tungsten and / or rhenium. The heating track can have a thickness of about 20μm.

[0060] The heating element can be located in a cavity (of the device) and can extend (e.g., along a longitudinal axis) from an inner substrate of the cavity towards an opening of the cavity. The length of the heating element (i.e., along the longitudinal axis of the heater) can be less than the depth of the cavity. Thus, the heating element can extend within only a part of the length of the cavity. In other words, the heating element can not extend through (or beyond) the opening of the cavity.

[0061] The heating element can be configured to be inserted into an aerosol - forming article (e.g., an HT consumable) when the aerosol - forming article is accommodated in the cavity. In this regard, the distal end of the heating element (i.e., away from the substrate of the heating element mounted to the device) can include a tapered portion, which can facilitate the insertion of the heating element into the aerosol - forming article. When the aerosol - forming article is accommodated in the cavity, the heating element can completely penetrate the aerosol - forming article. In other words, the entire length or substantially the entire length of the heating element can be accommodated in the aerosol - forming article.

[0062] The length of the heating element can be less than or substantially equal to the axial length of the aerosol - forming substrate that forms part of an aerosol - forming article (e.g., an HT consumable). Thus, when such an aerosol - forming article is engaged with the device, the heating element can penetrate only the aerosol - forming substrate, rather than other components of the aerosol - forming article. The heating element can penetrate the aerosol - forming substrate over substantially the entire axial length of the aerosol - forming substrate of the aerosol - forming article. Thus, when penetrated by the heating element, heat can be transferred from the heating element (e.g., the outer peripheral surface of the heating element) to the surrounding aerosol - forming substrate. In other words, the heat can be transferred radially outwards (in the case of a cylindrical heating element) or, for example, radially inwards (in the case of a tubular heater).

[0063] In the case where the heater is a tubular heater, the heating element of the tubular heater can surround at least a portion of the cavity. When a portion of the aerosol-forming article is received in the cavity, the heating element can surround that portion of the aerosol-forming article (i.e., so as to heat that portion of the aerosol-forming article). In particular, the heating element can surround the aerosol-forming substrate of the aerosol-forming article. In other words, when the aerosol-forming article is engaged with the device, the aerosol-forming substrate of the aerosol-forming article can be positioned adjacent to the inner surface of the (tubular) heating element. When the heating element is activated, heat can be transferred radially inward from the inner surface of the heating element to heat the aerosol-forming substrate.

[0064] The cavity can include (e.g., circumferential) wall(s), and the (tubular) heating element can extend around at least a portion of the wall. In this way, the wall can be located between the inner surface of the heating element and the outer surface of the aerosol-forming article. The wall(s) of the cavity can be formed of a thermally conductive material (e.g., metal) to allow heat conduction from the heating element to the aerosol-forming article. Thus, heat can be conducted from the heating element through the cavity wall(s) to the aerosol-forming substrate of the aerosol-forming article received in the cavity.

[0065] In some embodiments, the device can include a cap provided at an end of the body, the cap being configured to engage with the aerosol-forming article. In the case where the device includes a heater having a heating element, the cap can at least partially enclose the heating element. The cap can move between an open position in which there is a passageway to the heating element and a closed position in which the cap at least partially encloses the heating element. The cap can be slidably engaged with the body of the device and can slide between the open position and the closed position.

[0066] The cap can define at least a portion of the cavity of the device. In other words, the cavity can be entirely defined by the cap, or each of the cap and the body can define a portion of the cavity. In the case where the cap entirely defines the cavity, the cap can include a hole for receiving the heating element in the cavity (when the cap is in the closed position). The cap can include an opening leading to the cavity. The opening can be configured to receive at least a portion of the aerosol-forming article. In other words, the aerosol-forming article can be inserted through the opening and into the cavity (so as to engage with the device).

[0067] The cap can be configured such that when the aerosol-forming article is engaged with the device (e.g., received in the cavity), only a portion of the aerosol-forming article is received in the cavity. In other words, a portion of the aerosol-forming article (not received in the cavity) can project from the opening (i.e., extend beyond the opening). This (projecting) portion of the aerosol-forming article can be the terminal (e.g., mouth) end of the aerosol-forming article, which can be received in the user's mouth for the purpose of inhaling the aerosol formed by the device.

[0068] The device may include a power source or may be connected to a power source (such as a power source separate from the device). The power source may be electrically connected to the heater. In this regard, changing (such as switching) the electrical connection between the power source and the heater can affect the state of the heater. For example, switching the electrical connection between the power source and the heater can switch the heater between an on state and an off state. The power source may be a power storage device. For example, the power source may be a battery or a rechargeable battery (such as a lithium-ion battery).

[0069] The device may include an input connection (such as a USB port, a micro USB port, a USB-C port, etc.). The input connection may be configured to connect to an external power source, such as a power outlet. In some cases, the input connection may be used as an alternative to an internal power source (such as a battery or a rechargeable battery). In other words, the input connection may be electrically connected to the heater (to supply power to the heater). Thus, in some forms, the input connection may form at least a part of the power source of the device.

[0070] In the case where the power source includes a rechargeable power source (such as a rechargeable battery), the input connection may be used to charge and recharge the power source.

[0071] The device may include a user interface (UI). In some embodiments, the UI may include an input mechanism for receiving operation commands from the user. The input mechanism of the UI may allow the user to control at least one aspect of the operation of the device. In some embodiments, the input mechanism may include a power button to switch the device between an on state and an off state. In some embodiments, the input mechanism may include a motion sensor for receiving operation commands from the user by detecting the motion of the device. In some embodiments, the input mechanism may include a microphone for receiving operation commands through the user's voice. In some embodiments, the input mechanism may include a touch screen for the user to provide operation commands by touch. In some embodiments, the operation commands may include changing the mode by changing the working mode of the device, thereby improving the user experience.

[0072] In some embodiments, the UI may additionally or alternatively include an output mechanism to convey information to the user. In some embodiments, the output mechanism may include a light to indicate the status of the device (and / or the aerosol-forming article) to the user. In some embodiments, the output mechanism may include haptic feedback to indicate the status of the device. In some embodiments, the output mechanism may include a display screen to display the status of the device. The status of the device (and / or the aerosol-forming article) indicated to the user may include indicating the operating status of the heater. For example, the status may include whether the heater is in an off state or an on state. In some embodiments, the UI unit may include at least one of a button, a display, a touch screen, a switch, a light, etc. For example, the output mechanism may include one or more (e.g., two, three, four, etc.) light-emitting diodes ("LEDs") that may be located on the body of the device.

[0073] The device may further include a draw sensor (e.g., an airflow sensor), which forms part of the input mechanism of the UI. The draw sensor may be configured to detect the end (i.e., the terminal (mouth) end) of the user drawing on the aerosol-forming article. The draw sensor may be, for example, a pressure sensor or a microphone. The draw sensor may be configured to generate a signal indicative of the draw status. The signal may indicate that the user is drawing (aerosol from the aerosol-forming article), such that it is in the form of a binary signal, for example. Alternatively or additionally, the signal may indicate characteristics of the draw (e.g., the flow rate of the draw, the length of time of the draw, etc.). For example, the pressure sensor / airflow sensor may detect the pressure drop across the consumable. Alternatively, the sensor may detect the airflow into the device.

[0074] The device may further include a consumable detection sensor (e.g., a nicotine sensor, a tobacco sensor), which may form part of the input mechanism of the UI. The consumable detection sensor may be configured to detect the type of tobacco used or present in the consumable. The consumable detection sensor may be configured to detect the nicotine content present in the consumable. The consumable detection sensor may detect the tobacco type or nicotine content based on detecting active compounds / molecules in the consumable. The consumable detection sensor may be configured to generate a signal indicative of the tobacco type or nicotine content. The signal may indicate the type of consumable inserted in the device, such that it is in the form of a binary signal, for example. For example, the consumable detection sensor may be able to determine the visual characteristics of the consumable. For example, the color of the consumable may indicate the type of consumable. Alternatively, the consumable may include a detectable visual cue (e.g., a barcode) that can be detected by the consumable detection sensor. Additionally or alternatively, the signal may indicate the characteristics / properties of the consumable.

[0075] The device may include a controller or may be connected to a controller, which may be configured to control at least one function of the device. The controller may include, for example, a microcontroller that may be mounted on a printed circuit board (PCB). The controller may also include a memory, such as a non-volatile memory. The memory may include instructions that, when implemented, may cause the controller to perform certain tasks or steps of a method. In cases where the device includes an input connection, the controller may be connected to the input connection.

[0076] The controller may be configured to control the operation of a heater (and, for example, a heating element). Thus, the controller may be configured to control the vaporization of the aerosol-forming portion of an aerosol-forming article engaged with the device. The controller may be configured to control the intensity of aerosol delivery by controlling the operation of the heater. In some embodiments, the controller is configured to control the duration of aerosol delivery by controlling the operation of the heater. In some embodiments, the controller may be configured to control the amount of aerosol delivery. The controller may be configured to control the function of the device for controlling the amount of vapor generation according to user preferences. The controller may be configured to generate low-visibility or no-visibility vapor in a particular mode. This may be achieved by controlling one or more device functions, such as controlling the temperature of the heater, controlling the pressure of the air flow, controlling the relative position of the aerosol-forming substrate and the heater to change the degree of contact between the heater and the aerosol-forming substrate. In some embodiments, the controller may be configured to control the voltage applied to the heater by a power source. For example, the controller may be configured to switch between applying the full output voltage (of the power source) to the heater and not applying voltage to the heater. Alternatively or additionally, the control unit may implement a more complex heater control protocol.

[0077] The device may also include a voltage regulator to regulate the output voltage supplied by a power source to form a regulated voltage. The regulated voltage may then be applied to the heater.

[0078] In some embodiments where the device includes a UI, the controller may be operably connected to one or more components of the UI. The controller may be configured to receive command signals from the input mechanism of the UI. The controller may be configured to control the heater in response to the command signals. For example, the controller may be configured to receive "on" and "off" command signals from the UI and, in response, may control the heater to be in the corresponding on or off state. The controller may be configured to receive command signals from a consumable detection sensor and, in response, may control the heater. Additionally, the controller may be configured to receive command signals from the user via the input mechanism to change the mode of the device, thereby controlling the amount of aerosol delivery.

[0079] The controller can be configured to send an output signal to a component of the UI. The UI can be configured to communicate information to a user via an output mechanism in response to such an output signal (received from the controller). For example, in the case where the device includes one or more LEDs, the LEDs can be operably connected to the controller. Thus, the controller can be configured to control the illumination of the LEDs (e.g., in response to an output signal). For example, the controller can be configured to control the illumination of the LEDs according to the state (e.g., on or off) of the heater.

[0080] In the case where the device includes a sensor (e.g., a suction / airflow sensor / consumable detection sensor), the controller can be operably connected to the sensor. The controller can be configured to receive a signal from the sensor (e.g., indicating the condition of the device and / or the engaged aerosol-forming article). The controller can be configured to control an aspect of the heater or the output mechanism based on the signal from the sensor.

[0081] The device can include a wireless interface configured to communicate wirelessly with an external device (e.g., via Bluetooth (e.g., Bluetooth Low Energy connection) or Wi-Fi). Similarly, the input connection can be configured as a wired connection to an external device to provide communication between the device and the external device.

[0082] The external device can be a mobile device. For example, the external device can be a smart phone, a tablet, a smart watch, or a smart car. An application (e.g., an app) can be installed on the external device (e.g., the mobile device). The application can facilitate communication between the device and the external device via a wired connection or a wireless connection.

[0083] The wireless interface or the wired interface can be configured to transfer signals between the external device and the controller of the device. In this regard, the controller can control an aspect of the device in response to a signal received from the external device. Alternatively or additionally, the external device can respond to a signal received from the device (e.g., from the controller of the device).

[0084] In a third aspect, there is provided a system (e.g., a smoking alternative system) comprising a device according to the first aspect and an aerosol-forming article. The aerosol-forming article can include an aerosol-forming substrate at an upstream end of the aerosol-forming article. The article can be in the form of a smoking alternative article, such as a heated tobacco (HT) consumable (also known as a heat-not-burn (HNB) consumable).

[0085] In a fourth aspect, there is provided a heat-not-burn device comprising: a heater; and a controller configured to operate the heater to heat an aerosol-forming substrate engaged with the heater to a predetermined operating temperature, wherein the predetermined operating temperature is from 14°C to 170°C.

[0086] Since the common operating temperature of an HNB device is about 200°C or higher, this aspect provides a device that can operate at a lower temperature and thereby deliver vapor with lower visibility, which provides the above advantages.

[0087] All of the options and preferences described above with respect to the second aspect apply mutatis mutandis to the fourth aspect.

[0088] In particular, the controller can also be configured to operate the heater to heat an aerosol-forming substrate engaged with the heater to a second predetermined operating temperature, where the second predetermined operating temperature is greater than 170°C. In some embodiments, the second predetermined operating temperature is at least 180°C, such as at least 185°C, at least 190°C, at least 195°C, or at least 200°C. In some embodiments, the second predetermined operating temperature is greater than 170°C and less than or equal to about 220°C. In some embodiments, the second predetermined operating temperature is from 175°C to 220°C, such as from 175°C to 215°C, from 175°C to 210°C, from 180°C to 210°C, from 190°C to 210°C, or from 195°C to 205°C. In some embodiments, the second predetermined operating temperature is about 200°C.

[0089] A fifth aspect of the present invention is a method of reducing the amount of vapor generated by a heat-not-burn device, the heat-not-burn device including a heater and a controller configured to operate the heater to heat an aerosol-forming substrate engaged with the heater to a predetermined operating temperature, the method including reducing the predetermined operating temperature to a temperature of 140°C to 170°C.

[0090] In a sixth aspect, a system (such as a smoking alternative system) is provided that includes a device according to the second or fourth aspect and an aerosol-forming article. The aerosol-forming article can include an aerosol-forming substrate at an upstream end of the aerosol-forming article. The article can be in the form of a smoking alternative article, such as a heated tobacco (HT) consumable (also referred to as a heat-not-burn (HNB) consumable).

[0091] A seventh aspect of the present invention is a method of using a device according to the second or fourth aspect or a system according to the sixth aspect.

[0092] As used herein, the terms "upstream" and "downstream" are intended to refer to the direction of vapor / aerosol flow, i.e., the downstream end of the article / consumable is the mouth end or outlet where the aerosol exits the consumable for inhalation by the user. The upstream end of the article / consumable is the end opposite the downstream end.

[0093] The aerosol-forming substrate can be heated to release at least one volatile compound capable of forming an aerosol. The aerosol-forming substrate can be located at the upstream end of the article / consumable.

[0094] To produce an aerosol, the aerosol-forming substrate contains at least one volatile compound that is intended to be vaporized / atomized and can provide a recreational and / or therapeutic effect to the user when inhaled. Suitable chemical and / or physiologically active volatile compounds for providing a recreational effect to the user include: nicotine, caffeine, kavalactones, mysticin, β-carboline alkaloids, salvinorin A, and any combination, functional equivalent, and / or synthetic alternative of the foregoing. Suitable chemical and / or physiologically active volatile compounds for providing a therapeutic effect to the user include: theophylline and cathinone, and any combination, functional equivalent, and / or synthetic alternative of the foregoing.

[0095] The aerosol-forming substrate can include plant material. The plant material can include at least one plant material selected from the following list: Amaranthus spinosus Amaranthus dubius ), Arctostaphylos uva-ursi Arctostaphylos uva-ursi,Bearberry ), Argemone mexicana Argemone mexicana ), Artemisia absinthium Amica ), Camellia sinensis Artemisia vulgaris Yellow Tees ), Zantedeschia aethiopica Galea zacatechichi ), Canavalia maritima Canavalia maritima,Baybean ), Schefflera digitata Cecropia mexicana,Guamura [[ID= ( Cecropia mexicana,Guamura ), Telosma cordata Cestrum noctumum ), Cynoglossum virginianum Cynoglossum virginianum,wild comfrey ), Cytisus scoparius Cytisus scoparius ), Turnera diffusa Damiana ), Entada phaseoloides Entada rheedii ), Eschscholzia californica Eschscholzia californica, California Poppy ), Fittonia verschaffeltii Fittonia albivenis ), Hippobroma longiflora Hippobroma longiflora ), Humulus japonicus Humulus japonica,Japanese Hops ), Humulus lupulus Humulus lupulus,Hops ), Lactuca serriola Lactuca virosa,Lettuce Opium ), Blumea lacera Laggera alata ), Leonotis leonurus Leonotis leonurus ), Leonurus cardiaca Leonurus cardiaca,Motherwort ), Leonurus sibiricus Leonurus sibiricus, Honeyweed ), Lobelia cardinalis Lobelia cardinalis ), Lobelia inflata Lobelia inflata,Indian- tobacco ), Lobelia siphilitica Lobelia siphilitica ), Nepeta cataria Nepeta cataria,Catnip ), NicotianaNicotiana species,Tobacco )、Nymphaea alba Nymphaea alba,White Lily )、Nymphaea caerulea Nymphaea caerulea,Blue Lily )、Pedicularis densiflora Pedicularis densiflora,Indian Warrior )、Pedicularis gerardiana Pedicularis groenlandica,Elephant's Head )、Salvia leucantha Salvia divinorum )、Salvia dorrii Salvia dorrii,Tobacco Sage )、Salvia Salvia species,Sage )、Scutellaria galericulata Scutellaria galericulata )、Scutellaria lateriflora Scutellaria lateriflora )、Scutellaria rehderiana Scutellaria nana )、Scutellaria Scutellaria species,Skullcap )、Sida acuta Sida acuta,Wireweed )、Sida acuta Burm. f. var. rhombifolia Sida rhombifolia )、Silene undulata Silene capensis )、Syzygium aromaticum Syzygium aromaticum, Clove )、Tagetes lucida Tagetes lucida,Mexican Tarragon )、Wulfia frutescens Tarchonanthus camphoratus )、Turnera diffusa Turnera diffusa, Damiana )、Verbascum thapsus Verbascum, Mullein )、Cycas latifolia Zamia latifolia, Maconha Brava ) and any combination, functional equivalent and / or synthetic substitute of the foregoing. The aerosol-forming substrate may include at least one plant material selected from the following for medical effects: Passiflora edulis Sims Passiflora incarnata , Passionflower and any combination, functional equivalent and / or synthetic substitute of the foregoing.

[0096] The plant material may be tobacco. Any type of tobacco may be used. This includes but is not limited to, flue-cured tobacco, burley tobacco, Maryland tobacco, dark air-cured tobacco, oriental tobacco, dark fire-cured tobacco, perique tobacco and rustica tobacco. This also includes mixtures of the above tobaccos.

[0097] The tobacco may include one or more of tobacco leaves, tobacco stems, tobacco powder, tobacco dust, tobacco derivatives, expanded tobacco, homogenized tobacco, cut tobacco, extruded tobacco, shredded tobacco and / or reconstituted tobacco (e.g., sheet process reconstitution or paper process reconstitution).

[0098] The aerosol-forming substrate may include collected homogenized (e.g., paper process / sheet process reconstituted) tobacco sheets or collected fragments / strips formed from such sheets.

[0099] The aerosol-forming substrate may contain one or more additives selected from humectants, flavorants, fillers, aqueous / non-aqueous solvents and binders.

[0100] The flavorant can be provided in solid or liquid form. It can include menthol, licorice, chocolate, fruit flavors (including, for example, citrus, cherry, etc.), vanilla, spices (such as ginger, cinnamon) and tobacco flavors. The flavorant can be uniformly dispersed throughout the aerosol-forming substrate or can be provided at separate locations and / or varying concentrations throughout the aerosol-forming substrate.

[0101] The aerosol-forming substrate can be formed to be substantially cylindrical such that the article / consumable resembles a traditional cigarette. Its diameter can be from 5 mm to 10 mm, such as from 6 mm to 9 mm or from 6 mm to 8 mm, such as about 7 mm. Its axial length can be from 10 mm to 15 mm, such as from 11 mm to 14 mm, such as about 12 mm or 13 mm.

[0102] The article / consumable can include at least one filter element. There can be a terminal filter element at the downstream / mouth end of the article / consumable.

[0103] The filter element or at least one filter element (such as the terminal filter element) can be composed of cellulose acetate or polypropylene tow. The at least one filter element (such as the terminal filter element) can be composed of activated carbon. The at least one filter element (such as the terminal element) can be composed of paper. The filter element or each filter element can be at least partially (such as completely) surrounded by a filter rod wrapper (such as a paper-type filter rod wrapper).

[0104] The terminal filter element (at the downstream end of the article / consumable) can be connected to the upstream element forming the article / consumable by wrapping around a tipping layer (such as a tipping paper layer). The axial length of the tipping paper can be longer than the axial length of the terminal filter element such that the tipping paper completely surrounds the terminal filter element and the wrapper layer around any adjacent upstream element.

[0105] In some embodiments, the article / consumable can include an aerosol cooling element adapted to cool the aerosol generated by the aerosol-forming substrate (by heat exchange) before being inhaled by the user.

[0106] The article / consumable can include a spacer element that defines a space or cavity between the aerosol-forming substrate and the downstream end of the consumable. The spacer element can include a cardboard tube. The spacer element can be surrounded by a (paper) wrapper layer.

[0107] The present invention includes combinations of the aspects and preferred features described, unless such combinations are clearly impossible or expressly avoided.

[0108] Those skilled in the art will understand that, unless mutually exclusive, the features or parameters described with respect to any one of the above aspects can be applied to any other aspect. Additionally, unless mutually exclusive, any feature or parameter described herein can be applied to any aspect and / or combined with any other feature or parameter described herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0109] To understand the present invention and to understand other aspects and features of the present invention, embodiments illustrating the principles of the present invention will now be discussed in more detail with reference to the accompanying drawings, in which: Figure 1A is a schematic view of a smoking replacement system; Figure 1B is Figure 1A a schematic view of a variant of the smoking replacement system of Figure 2A is a front view of a first embodiment of a smoking replacement system in which a consumable is engaged with a device; Figure 2B is a front view of a first embodiment of a smoking replacement system in which a consumable is disengaged from a device; Figure 2C is a cross-sectional view of a consumable of a first embodiment of a smoking replacement system; Figure 2D is a detail view of an end of a device of a first embodiment of a smoking replacement system; Figure 2E is a cross-sectional view of a first embodiment of an alternative smoking system; and Figure 3 is a block diagram of an embodiment of a heated tobacco device, and; Figure 3 is a schematic view of an embodiment. DETAILED DESCRIPTION

[0110] Aspects and embodiments of the present invention will now be discussed with reference to the accompanying drawings. Other aspects and embodiments will be apparent to those skilled in the art. All documents mentioned herein are incorporated herein by reference.

[0111] Figure 1A is a schematic view providing an overall overview of a smoking replacement system 100. The system 100 includes a smoking replacement device 101 and an aerosol-forming article in the form of a consumable 102, the consumable 102 containing an aerosol precursor 103. The system is configured to vaporize the aerosol precursor by heating the aerosol precursor (in order to form a vapor / aerosol for inhalation by a user).

[0112] In the illustrated system, heater 104 forms part of consumable 102 and is configured to heat aerosol precursor 103. In this variant, for example, when consumable 102 is engaged with device 101, heater 104 can be electrically connected to power source 105. Heat from heater 104 vaporizes aerosol precursor 103 to produce vapor. The vapor then condenses to form an aerosol, which is ultimately inhaled by the user.

[0113] System 100 also includes power source 105, which forms part of device 101. In other embodiments, power source 105 can be external to device 101 (but connectable to device 101). Power source 105 can be electrically connected to heater 104 such that it can supply power to heater 104 (i.e., for the purpose of heating aerosol precursor 103). Thus, control of the electrical connection between power source 105 and heater 104 provides control of the state of heater 104. Power source 105 can be a power storage device, such as a battery or rechargeable battery (e.g., a lithium-ion battery).

[0114] System 100 further includes an I / O module that includes connector 106 (e.g., in the form of a USB port, micro-USB port, USB-C port, etc.). Connector 106 is configured to connect to an external power source, such as a power outlet. Connector 106 can be used in place of power source 105. In other words, connector 106 can be electrically connected to heater 104 to supply power to heater 104. In such embodiments, the device may not include a power source, and the power source of the system can alternatively include connector 106 and an external power source (connector 106 provides the electrical connection to the external power source).

[0115] In some embodiments, in the case where power source 105 includes a rechargeable battery, connector 106 can be used to charge and recharge power source 105.

[0116] System 100 also includes a user interface (UI) 107. Although not shown, UI 107 can include an input mechanism for receiving commands from the user. The input mechanism of UI 107 allows the user to control at least one aspect of the operation of system 100. The input mechanism can, for example, be in the form of a button, touch screen, switch, microphone, motion sensor, etc.

[0117] UI 107 also includes an output mechanism for communicating information to the user. The output mechanism can, for example, include a light (e.g., an LED), a display screen, a speaker, a vibration generator, etc.

[0118] System 100 also includes a controller 108 configured to control at least one function of the device 101. In the illustrated embodiment, the controller 108 is a component of the device 101, but in other embodiments, the controller 108 may be separate from (but connectable to) the device 101. The controller 108 is configured to control the operation of the heater 104 and, for example, may be configured to control the voltage applied from the power supply 105 to the heater 104. The controller 108 may be configured to switch the power supply to the heater 104 between an on state (wherein the full output voltage of the power supply 105 is applied to the heater 104) and an off state (wherein no voltage is applied to the heater 104).

[0119] Although not shown, system 100 also includes a voltage regulator that regulates the output voltage from the power supply 105 to form a regulated voltage. The regulated voltage may then be applied to the heater 104.

[0120] In addition to being connected to the heater 104, the controller 108 is operably connected to the UI 107. Thus, the controller 108 can receive input signals from the input mechanism of the UI 107. Similarly, the controller 108 can transmit output signals to the UI 107. In response, the output mechanism of the UI 107 can convey information to the user based on the output signals. The controller also includes a memory 109 that is a non-volatile memory. The memory 109 includes instructions that, when implemented, cause the controller to perform certain tasks or steps of a method.

[0121] Figure 1B is a schematic diagram showing Figure 1A a variant of the smoking substitute system 100. In Figure 1B the system 100', the heater 104 forms part of the device 101 rather than part of the consumable 102. In this variant, the heater 104 can be electrically connected to the power supply 105. \n

[0122] \n Figure 2A \nand\n Figure 2B \nshows a heated tobacco (HT) smoking substitute system 200. System 200 is an example of the system 100, system 100' described with respect to Figure 1A or Figure 1B above. System 200 includes an HT device 201 and an HT consumable 202. The above Figure 1A and Figure 1B description applies to Figure 2A and Figure 2B the system 200 and will not be repeated herefore.\n

[0123] The device 201 and the consumable 202 are configured such that the consumable 202 can be engaged with the device 201. Figure 2Ashows the device 201 and the consumable 202 in the engaged state, while Figure 2B shows the device 201 and the consumable 202 in the disengaged state.

[0124] The device 201 includes a body 209 and a cap 210. In use, the cap 210 engages at the end of the body 209. Although not apparent in the drawings, the cap 210 is movable relative to the body 209. In particular, the cap 210 is slidable and can slide along the longitudinal axis of the body 209.

[0125] The device 201 includes an output mechanism (forming part of the UI of the device 201) in the form of a plurality of light emitting diodes (LEDs) 211, which are linearly arranged along the longitudinal axis of the device 201 and on the outer surface of the body 209 of the device 201. A button 212 is also arranged on the outer surface of the body 209 of the device 201 and is axially spaced (i.e., along the longitudinal axis) from the plurality of LEDs 211.

[0126] Figure 2C Shows a detailed cross-sectional view of the consumable 202 of the system 200. The consumable 202 generally resembles a cigarette. In this regard, the consumable 202 has a generally cylindrical shape with a diameter of 7 mm and an axial length of 70 mm. The consumable 202 includes an aerosol-forming substrate 213, a terminal filter element 214, an upstream filter element 215, and a spacer element 216. In other embodiments, the consumable may also include a cooling element. The cooling element can exchange heat with the vapor formed by the aerosol-forming substrate 213 in order to cool the vapor, thereby promoting the condensation of the vapor.

[0127] The aerosol-forming substrate 213 is substantially cylindrical and is located at the upstream end 217 of the consumable 202 and contains the aerosol precursor of the system 200. In this regard, the aerosol-forming substrate 213 is configured to be heated by the device 201 to release vapor. The released vapor is then entrained in an air flow passing through the aerosol-forming substrate 213. The air flow is generated by the user's action of sucking on the downstream end 218 (i.e., the terminal or mouthpiece) of the consumable 202.

[0128] In the present embodiment, the aerosol-forming substrate 213 contains tobacco material, which may include, for example, any suitable part of the tobacco plant (such as leaves, stems, roots, bark, seeds, and flowers). The tobacco may include one or more of tobacco leaves, tobacco stems, tobacco powder, tobacco dust, tobacco derivatives, expanded tobacco, homogenized tobacco, cut tobacco, extruded tobacco, shredded tobacco, and / or reconstituted tobacco (such as reconstituted by the slurry method or the paper method). For example, the aerosol-forming substrate 213 may include collected homogenized (e.g., paper method / slurry method reconstituted) tobacco sheets or collected fragments / strips formed from such sheets.

[0129] To generate an aerosol, the aerosol-forming substrate 213 comprises at least one volatile compound which is intended to be vaporized / atomized and which, when inhaled, can provide a recreational and / or therapeutic effect to the user. The aerosol-forming substrate 213 may also comprise one or more additives. For example, such additives may be in the form of humectants (such as propylene glycol and / or vegetable glycerin), flavorants, fillers, aqueous / non-aqueous solvents and / or binders.

[0130] The end filter element 214 is also substantially cylindrical and is located at the downstream end 218 of the consumable 202 downstream of the aerosol-forming substrate 213. The end filter element 214 is in the form of a hollow pore filter element which has pores 219 (such as for air flow) formed therethrough. The diameter of the pores 219 is 2 mm. The end filter element 214 is formed from a porous (such as monoacetate) filter material. As described above, the downstream end 218 of the consumable 202 (i.e., where the end filter 214 is located) forms the nozzle portion of the consumable 202 which the user sucks on. Air flow is drawn from the upstream end 217 through the consumable 202 assembly and exits the downstream end 218. The air flow is driven by the user sucking on the downstream end 218 (i.e., the nozzle portion) of the consumable 202.

[0131] The upstream filter element 215 is located between the aerosol-forming substrate 213 and the end filter element 214 and is axially adjacent to the aerosol-forming substrate 213. Similar to the end filter 214, the upstream filter element 215 is in the form of a hollow pore filter element such that it has pores 220 extending axially therethrough. In this way, the upstream filter 215 can act as an air flow restrictor. The upstream filter element 215 is formed from a porous (such as monoacetate) filter material. The pores 220 of the upstream filter element 215 have a larger diameter (3 mm) than the end filter element 214.

[0132] The spacer 216 is in the form of a cardboard tube which defines a cavity or chamber between the upstream filter element 215 and the end filter element 214. The spacer 216 is used to allow cooling and mixing of the vapors / aerosol from the aerosol-forming substrate 213. The spacer has an outer diameter of 7 mm and an axial length of 14 mm.

[0133] Although not apparent in the drawings, the aerosol-forming substrate 213, the upstream filter 215 and the spacer 216 are surrounded by a paper wrapper layer. The end filter 214 is surrounded by a tipping layer which also surrounds a portion of the paper wrapper layer (in order to connect the end filter 214 to the rest of the consumable 202). The upstream filter 215 and the end filter 214 are surrounded by other wrapper layers in the form of filter rod wrappers.

[0134] Now turning back to the device 201,Figure 2D A detailed view of an end of the device 201 configured to engage with the consumable 202 is illustrated. The cap 210 of the device 201 includes an opening 221 leading to an inner cavity 222 defined by the cap 210 ( Figure 2D more clearly shown in). The opening 221 and the cavity 222 are formed to accommodate at least a portion of the consumable 202. During the engagement of the consumable 202 with the device 201, a portion of the consumable 202 is received through the opening 221 and into the cavity 222. After the engagement (see Figure 2B ), the downstream end 218 of the consumable 202 protrudes from the opening 221 and thus also from the device 201. The opening 221 includes laterally disposed notches 226. These notches 226 remain open when the consumable 202 is received in the opening 221 and can be used, for example, to hold a lid to cover the end of the device 201.

[0135] Figure 2E A cross-section through the central longitudinal plane of the device 201 is shown. The device 201 is shown engaged with the consumable 202.

[0136] The device 201 includes a heater 204 that includes a heating element 223. The heater 204 forms part of the body 209 of the device 201 and is firmly mounted to the body 209. In the illustrated embodiment, the heater 204 is a rod-shaped heater, where the heating element 223 has a circular cross-sectional profile. In other embodiments, the heater may be in the form of a blade-shaped heater (e.g., a heating element having a rectangular cross-sectional profile) or a tubular heater (e.g., a heating element having a tubular shape).

[0137] The heating element 223 of the heater 204 projects from the inner base of the cavity 222 towards the opening 221 along the longitudinal axis. As is apparent from the drawings, the length of the heating element (i.e., along the longitudinal axis) is less than the depth of the cavity 222. In this way, the heating element 223 does not project or extend beyond the opening 221.

[0138] When the consumable 202 is received in the cavity 222 (as shown in Figure 2E ), the heating element 223 penetrates the aerosol-forming substrate 213 of the consumable 202. In particular, the heating element 223 extends over substantially the entire axial length of the aerosol-forming substrate 213 when inserted therein. Thus, when the heater 204 is activated, heat is radially transferred from the outer peripheral surface of the heating element 223 to the aerosol-forming substrate 213.

[0139] Alternatively, the heater 204 is movably mounted to the body 209. The heater can be moved longitudinally such that the longitudinal position of the heating element 223 can be changed to control the exposure of the consumable portion to the heating element.

[0140] The device 201 further includes an electronics cavity 224. A power source in the form of a rechargeable battery 205 (lithium-ion battery) is located in the electronics cavity 224.

[0141] The device 201 includes a connector in the form of a USB port 206 (i.e., forming part of the I / O module of the device 201). Alternatively, the connector can be, for example, a micro USB port or a USB-C port. The USB port 206 can be used to charge the rechargeable battery 205.

[0142] The device 201 includes a controller (not shown) located in the electronics cavity 224. The controller includes a microcontroller mounted on a printed circuit board (PCB). The USB port 206 is also connected to the controller 208 (i.e., connected to the PCB and the microcontroller).

[0143] The controller 208 is configured to control at least one function of the device 202. For example, the controller 208 is configured to control the operation of the heater 204. This control of the operation of the heater 204 can be achieved by the controller switching the electrical connection between the rechargeable battery 205 and the heater 204. For example, the controller 208 is configured to control the heater 204 in response to the user pressing the button 212. Pressing the button 212 can cause the controller to allow voltage (from the rechargeable battery 205) to be applied to the heater 204 (so that the heating element 223 heats up).

[0144] The controller is also configured to control the LED 211 in response to (e.g., detecting) the state of the device 201 or the consumable 202. For example, the controller can control the LED to indicate whether the device 201 is in the on state or the off state (e.g., when the device is in the on state, one or more LEDs can be lit by the controller).

[0145] The device 201 also includes an input mechanism in the form of a suction sensor 225 (i.e., in addition to the button 212). The suction sensor 225 is configured to detect user suction (i.e., inhalation) at the downstream end 218 of the consumable 202. The suction sensor 225 can be, for example, in the form of a pressure sensor, a flow meter, or a microphone. The suction sensor 225 is operably connected to the controller 208 in the electronics cavity 224 such that a signal from the suction sensor 225 indicating the suction state (i.e., suction or no suction) forms an input to the controller 208 (and can thus be responded to by the controller 208).

[0146] Figure 3 A block diagram of a heated tobacco device 301 is shown.

[0147] The device 301 includes a heater 304 that includes a heating element.

[0148] Device 301 includes a consumable detection sensor 328 and a draw sensor 325. After detecting a predetermined draw signal from the user, the signal from the draw sensor can be used to initiate a mode change from a first mode to a second mode or from the second mode to the first mode. In some embodiments, the predetermined draw signal can be, for example, the user drawing for more than a draw duration threshold. In some embodiments, after detecting a draw of a predetermined duration, the draw sensor 325 can provide a signal to the controller 308 for changing the mode from the first to the second or from the second to the first.

[0149] The consumable detection sensor 328 is configured to detect various types of consumables or tobacco. The consumable detection sensor 328 can detect the level of nicotine present in the tobacco. The consumable detection sensor 328 can, for example, detect chemicals or molecules to determine the level of tobacco and / or nicotine content. The consumable detection sensor 328 can be a biosensor that contacts the consumable during use and determines the tobacco type or nicotine level. The consumable detection sensor 328 can be an aerosol sensor that detects the chemicals present in the aerosol from the consumable to detect the tobacco type and / or nicotine level. The consumable detection sensor 328 is operatively coupled to the controller 308. The consumable detection sensor 328 can signal to the controller 308 the type of tobacco present in the consumable 202. The signal from the consumable detection sensor 328 forms an input to the controller 308, and the controller 308 selects the operating mode based on this input.

[0150] The controller 308 is configured to operate the heater of the device 202 according to at least two user-selectable operating modes. The two user-selectable operating modes are a first mode and a second mode. The first mode can be considered a normal mode or a standard mode. In the first mode, a first amount of nicotine is delivered to the user. The second mode can be considered an "enhanced" mode or a "strengthened" mode. In the second mode, a second amount of nicotine is delivered to the user. The second amount is greater than the first amount. In other words, the device delivers more nicotine to the user when operating in the second mode than in the first mode.

[0151] There are many operating mode mechanisms to achieve the difference in nicotine delivery between the operating modes. Some of these mechanisms are exemplified here. However, those skilled in the art should understand that other mechanisms are also feasible.

[0152] In some embodiments, the duration of the consumable cycle is longer in the second mode compared to the first mode. In other words, the heater remains at the operating temperature for a longer period of time in the second mode than in the first mode. Accordingly, the device is capable of delivering a greater amount of nicotine in the second mode than in the first mode. For example, the heater operates for 5 minutes in the second mode instead of 4 minutes in the first mode. This allows the user to have an "intensified" consumable cycle that delivers more nicotine. A consumable cycle is the period of time during which a single consumable is heated for use by the user.

[0153] In some embodiments, in the second mode, the controller 308 is configured to operate the heater at a higher temperature than in the first mode. The higher temperature can result in a higher nicotine output per puff by the user. Accordingly, nicotine is delivered at a higher rate in the second mode than in the first mode. The controller 308 can be configured to increase the temperature of the heater 304 by controlling the power supply to the heater.

[0154] The second mode can be selected by the user using the user interface of the device. The user interface can include at least one of a button, a touch screen, a motion sensor, or a voice recognition mechanism. Any of these components can be used to select or change the operating mode of the device. In embodiments that include a motion sensor, the device can be configured to change the operating mode in response to detecting a predetermined motion of the device by the user.

[0155] In some embodiments, the device has a default mode, where the default mode is one of the first or second operating modes. Unless the user changes the mode (e.g., using the user interface of the device), the device will operate according to the default mode. In some embodiments, the device is configured to allow the user to change the default mode. In some embodiments, the device is configured to select the default mode based on the historical use of the device.

[0156] In an alternative configured to adjust the visibility of the vapor formed from the aerosol-forming substrate, the controller 208 is configured to operate the heater of the device 201 according to at least two alternative modes. The modes can be user-selectable modes. Two user operating modes are the first mode and the second mode. In the first mode, the controller 208 is configured to control the heating of the heater 204 within a predetermined range. In an embodiment, the predetermined range is 140°C to 170°C. In this mode, the visibility of the generated vapor is low. Additionally, the controller 208 is configured to, in the first mode, primarily deliver nicotine and flavorants in the aerosol / vapor generated from the aerosol-forming substrate 202 with minimal or no aerosol visibility. The second mode is the normal / standard mode, in which the visibility of the vapor generated from the aerosol-forming substrate 202 is higher compared to the first mode. In the second mode, the controller is configured to maintain the temperature of the heater above 170°C (e.g., at about 200°C). The controller 208 is configured to operate the device in the first mode or the second mode throughout the consumable cycle. The operating temperature of the first mode can vary according to the type of the selected aerosol-forming substrate 202.

[0157] The controller 208 is configured to vary the airflow through the device to change the pressure drop across the consumable and ultimately change the amount of vapor generated. Varying the airflow creates a pressure drop in the device. The pressure drop is related to the visibility of the formed vapor. Thus, a low pressure drop results in visible vapor, and as the pressure drop increases, the visibility of the vapor decreases. Therefore, to operate the device in the first mode, the controller 208 adjusts the airflow to create a higher pressure drop. Additionally, the device includes a mechanism for controlling the airflow rate entering the device. Alternatively, the device can control the opening of the inlet of the device (not shown in the figure) to change the pressure drop of the airflow entering the device. Similarly, the opening of the airflow channel formed in the device can be changed to vary the pressure drop through the device.

[0158] The controller 208 may also be configured to move the heater 204 relative to the aerosol-forming substrate 202 so as to vary the amount of contact between the heater and the substrate according to a selected mode. The amount of contact of the heater in the first mode is less than the amount of contact in the second mode. In other words, in the first mode, the aerosol-forming substrate is exposed to the heater less than the aerosol-forming substrate is exposed to the heater in the second mode. The exposure of the aerosol-forming substrate 202 to the heater may vary the visibility of the vapor. A reduction in the exposure of the aerosol-forming substrate 202 in the first mode will result in a reduction in the heat transferred to the aerosol-forming substrate 202. Accordingly, the controller 202 may move the heater 204 relative to the aerosol-forming substrate 202 portion to vary the amount of contact between the heater 204 and the aerosol-forming substrate 202. Alternatively, the controller may vary the length of the chamber 222 configured to receive / interpose the aerosol-forming substrate / consumable 202 and hold the heater stationary to vary the amount of contact between the heater and the aerosol-forming substrate 202.

[0159] Depending on the context, the features disclosed in the foregoing description, or in the appended claims, or in the drawings, in their specific forms or in the means for performing the disclosed functions, or in the method or process for obtaining the disclosed results, may be used alone or in any combination of such features in various forms to implement the invention.

[0160] This application also includes the following embodiments: Embodiment 1: A heated tobacco device, comprising: a heater; a controller configured to operate the heater according to at least two user-selectable operating modes, the operating modes being selectable by the user via a user input mechanism, wherein the heater is for engaging a heated tobacco consumable comprising an active ingredient for delivery to the user; wherein the at least two user-selectable operating modes include: a first mode in which the heater is operated to deliver a first amount of the active ingredient to the user, and a second mode in which the heater is operated to deliver a second amount of the active ingredient to the user, and wherein the second amount of the active ingredient is higher than the first amount of the active ingredient.

[0161] Embodiment 2: The device according to embodiment 1, wherein in the second mode, the controller operates the heater to deliver the active ingredient at a higher rate than in the first mode.

[0162] Embodiment 3: The device according to embodiment 1 or 2, wherein the controller is configured to operate the heater at a first operating temperature in the first mode and at a second operating temperature in the second mode, wherein the second operating temperature is higher than the first operating temperature.

[0163] Embodiment 4: The device according to any one of the preceding embodiments, wherein the controller is configured to operate the heater for a first consumable cycle duration in the first mode and to operate the heater for a second consumable cycle duration in the second mode, wherein the second consumable cycle duration is longer than the first consumable cycle duration.

[0164] Embodiment 5: The device according to any one of the preceding embodiments, wherein the controller is configured to select from the at least two operating modes based on a user default mode.

[0165] Embodiment 6: The device according to Embodiment 5, wherein the controller is configured to allow the user to set the user default mode.

[0166] Embodiment 7: The device according to Embodiment 5, wherein the controller is configured to set the user default mode based on the historical use of the device.

[0167] Embodiment 8: The device according to any one of the preceding embodiments, wherein the active ingredient is nicotine.

[0168] Embodiment 9: The device according to any one of the preceding embodiments, further comprising: a consumable detection sensor for detecting the type of consumable engaged with the heater or for detecting the active ingredient content of the consumable.

[0169] Embodiment 10: The device according to Embodiment 9, wherein the controller is configured to select from the at least two operating modes based on the detected type of consumable or based on the active ingredient content of the detected type of consumable.

[0170] Embodiment 11: The device according to any one of the preceding embodiments, wherein the user input mechanism includes a button.

[0171] Embodiment 12: The device according to any one of the preceding embodiments, wherein the user input mechanism includes a touch screen.

[0172] Embodiment 13: The device according to any one of the preceding embodiments, wherein the user input mechanism includes a motion sensor for detecting a predetermined motion of the device.

[0173] Embodiment 14: The device according to any one of the preceding embodiments, wherein the user input mechanism includes a voice recognition mechanism.

[0174] Although the present invention has been described in connection with the above exemplary embodiments, many equivalent modifications and variations will be apparent to those skilled in the art when the present disclosure is given. Accordingly, the exemplary embodiments of the invention set forth above are to be considered illustrative and not restrictive. Various changes may be made to the described embodiments without departing from the spirit and scope of the invention.

[0175] For the avoidance of any doubt, any theoretical explanations provided herein are provided for the purpose of enhancing the reader's understanding. The inventors do not wish to be bound by any of these theoretical explanations.

[0176] Any section headings used herein are for organizational purposes only and should not be construed as limiting the subject matter described.

[0177] Throughout the specification, including the appended claims, unless the context requires otherwise, the words "have", "comprise", and "include" and variations such as "having", "comprises", "comprising", and "including" shall be understood to imply the inclusion of a stated integer or step or a group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.

[0178] It should be noted that, as used in the specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" include plural referents. Ranges may be expressed herein as from "about" one particular value and / or to "about" another particular value. When such a range is expressed, another embodiment includes from one particular value and / or to other particular values. Similarly, when values are expressed as approximations by use of the antecedent "about", it will be understood that the particular value forms another embodiment. The term "about" associated with a numerical value is optional and means, for example, + / - 10%.

[0179] The words "preferred" and "preferably" as used herein refer to embodiments of the invention that may provide certain benefits in certain circumstances. However, it should be understood that in the same or different circumstances, other embodiments may also be preferred. Accordingly, the recitation of one or more preferred embodiments is not intended to imply or suggest that other embodiments are unavailable, and is not intended to exclude other embodiments from the scope of the present disclosure or the scope of the claims.

Claims

1. A heat-not-burn device (201), comprising: A heater (204); A controller (208), the controller (208) being configured to operate the heater (204) to heat an aerosol-forming substrate (202) engaged with the heater (204) to a predetermined operating temperature, wherein the controller (208) is configured to operate the heater (204) in at least two modes, the at least two modes including a first mode in which the aerosol-forming substrate (202) forms a vapor having a first visibility and a second mode in which the aerosol-forming substrate (202) forms a vapor having a second visibility, wherein the first visibility is lower than the second visibility.

2. The device (201) according to claim 1, wherein the controller (208) is configured to operate the heater (204) at a first predetermined operating temperature in the first mode and at a second predetermined operating temperature in the second mode, wherein the first predetermined operating temperature is lower than the second predetermined operating temperature.

3. The device (201) according to claim 2, wherein the first predetermined operating temperature is 140°C to 170°C.

4. The device (201) according to claim 2 or 3, wherein the second predetermined operating temperature is greater than 170°C, such as about 200°C.

5. The device (201) according to any one of claims 1 to 4, wherein the controller (208) is configured to change the air flow to control the pressure drop based on the selected mode.

6. The device (201) according to claim 5, wherein the controller (208) is configured to change the air flow such that the pressure drop in the first mode is higher than the pressure drop in the second mode.

7. The device (201) according to any one of claims 1 to 6, wherein the heater (204) is adapted to move relative to the aerosol-forming substrate (202) to change the amount of contact between the heater (204) and the aerosol-forming substrate (202) according to the selected mode.

8. The device (201) according to claim 7, wherein the amount of contact between the heater (204) and the aerosol-forming substrate (202) in the first mode is less than the amount of contact between the heater (204) and the aerosol-forming substrate (202) in the second mode.

9. The device (201) according to any one of claims 1 to 8, wherein the device further comprises a user input mechanism for the user to select a mode.

10. The device (201) according to any one of claims 1 to 9, wherein the device further comprises an output mechanism configured to indicate to the user the currently selected operating mode.

11. A heat-not-burn device (201), comprising: A heater (204); A controller (208), the controller (208) being configured to operate the heater (204) to heat an aerosol-forming substrate (202) engaged with the heater (204) to a predetermined operating temperature, Wherein the predetermined operating temperature is 140°C to 170°C.

12. The apparatus (201) according to claim 11, wherein the controller (208) is further configured to operate the heater (204) at a second predetermined operating temperature greater than 170°C.

13. A method of reducing the amount of vapor generated by a heat-not-burn device, the heat-not-burn device including a heater (204) and a controller (208), the controller (208) being configured to operate the heater (204) to heat an aerosol-forming substrate (202) engaged with the heater (204) to a predetermined operating temperature, the method including reducing the predetermined operating temperature to a temperature of 140°C to 170°C.

14. A smoking alternative system, comprising: The apparatus (201) according to any one of claims 1 to 12; and An aerosol-forming article.

15. The smoking alternative system according to claim 14, wherein the article is a heat-not-burn (HNB) consumable.

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