Smoking substitute system

Abstract

To provide a method of operating a heat-not-burn device.SOLUTION: A method of operating a heat-not-burn device comprises: supplying a first power level to a heating element of the device, upon activation of the device, for a first period; supplying a second power level to the heating element, for a second period, where the first power level is greater than the second power level; and providing an indication to a user of the device after the completion of the second period.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] [1] The present invention relates to smoking substitution systems, and particularly, but not exclusively, to non-combustion heated devices and methods of operating the non-combustion heated devices with different power levels supplied to the non-combustion heated devices. [Background technology]

[0002] [2] Tobacco smoking is generally considered to expose smokers to potentially harmful substances. It is generally believed that significant amounts of potentially harmful substances are produced through the burning of tobacco and / or the heat caused by tobacco combustion, as well as through the burned tobacco components in the tobacco smoke itself.

[0003] [3] Traditional combustible smoking articles, such as cigarettes, typically include a cylindrical tobacco rod containing strips of tobacco surrounded by a wrapper, and typically also include a cylindrical filter axially aligned in abutting relationship with the wrapped tobacco rod. The filter typically includes a filtration material circumscribed by plug wrap. The wrapped tobacco rod and filter are held together by a rolled strip of tipping paper that circumscribes 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 mainstream smoke into their mouth by drawing on the mouth or filter end of the cigarette.

[0004] [4] Combustion of organic materials such as tobacco is known to produce tar and other potentially harmful by-products. To avoid tobacco smoking, various smoking substitute systems (or "substitute smoking systems") have been proposed.

[0005] [5] Such smoking substitution systems can form part of nicotine replacement therapy aimed at people wishing to quit smoking and overcome their dependence on nicotine.

[0006] [6] Smoking substitution systems include electronic systems that allow users to simulate the act of smoking by producing an aerosol (also called a "vapor") that is drawn into the lungs (inhaled) through the mouth and then exhaled. The inhaled aerosol typically contains nicotine and / or flavorings without or with fewer of the odors and health risks associated with traditional smoking.

[0007] [7] Generally, smoking substitution systems are intended to provide a substitute for the habit of smoking while providing users with an experience and satisfaction similar to that experienced with traditional smoking and combustible tobacco products. Some smoking substitution systems use smoking substitution articles (also called "consumables"), which are designed to resemble traditional cigarettes and are cylindrical in shape with a mouthpiece at one end.

[0008] [8] The popularity and use of smoking substitution systems have grown rapidly over the past few years. Although originally marketed as aids to help chronic smokers wanting to quit smoking cigarettes, consumers increasingly view smoking substitution systems as a desirable lifestyle accessory.

[0009] [9] Several different categories of smoking proxy systems exist, each of which utilizes a different smoking proxy approach.

[0010]

[10] One approach for smoking substitution systems is the so-called heated tobacco ("HT") approach, in which tobacco (not "e-liquid") is heated or warmed to release vapor. HT is also known as "heat-not-burn" ("HNB"). The tobacco may be leaf tobacco or reconstituted tobacco. The vapor may contain nicotine and / or flavorings. In the HT approach, the intention is that the tobacco is heated without being burned, i.e., the tobacco does not undergo combustion.

[0011]

[11] A typical HT smoking substitution system includes a device and a consumable. The consumable can include tobacco material. The device and consumable can be configured to be physically coupled together. In use, heat can be applied to the tobacco material by a heating element in the device, and airflow through the tobacco material causes components in the tobacco material to be released as vapor. The vapor can also be formed from a carrier in the tobacco material (which can include, for example, propylene glycol and / or vegetable glycerin), as well as volatile compounds released from the tobacco. The released vapor can be entrained in the airflow drawn through the tobacco.

[0012]

[12] As the vapor passes through the consumable (entrained in an airflow) from the point of evaporation to the outlet of the consumable (e.g., a mouthpiece), the vapor cools and condenses to form an aerosol for inhalation by the user. The aerosol typically contains volatile compounds.

[0013]

[13] In HT smoking substitute systems, heating, as opposed to burning, tobacco material is believed to result in fewer or lower amounts of the more harmful compounds typically produced during smoking. As a result, the HT approach can reduce odor and / or health risks that can arise through tobacco burning, tobacco combustion, and pyrolytic degradation.

[0014]

[14] Improved designs of smoking proxy systems, especially HT smoking proxy systems, are needed to enhance the user experience and improve the functionality of HT smoking proxy systems.

[0015]

[15] The present disclosure has been devised in view of the above problems. Summary of the Invention

[0016]

[16] Most generally, the present invention relates to a method of operating a non-combustion heated device by supplying different levels of power to the heating element after the device is powered on.

[0017]

[17] According to a first aspect of the present invention, there is provided a method of operating a non-combustion heated device, the method comprising, upon activation of the device, supplying a first power level to a heating element of the device for a first time period, and supplying a second power level to the heating element for a second time period, the first power level being greater than the second power level, and providing instructions to a user of the device after completion of the second time period.

[0018]

[18] Optionally, the first period is different from the second period.

[0019]

[19] Optionally, the first period is longer than the second period.

[0020]

[20] Optionally, the first period is shorter than the second period.

[0021]

[21] Optionally, the second period occurs after the first period.

[0022]

[22] Optionally, the method further includes supplying at least one intermediate power level to the heating element for each intermediate period, each respective intermediate power level being between the first power level and the second power level.

[0023]

[23] Optionally, the method further comprises providing at least one intermediate power level between providing the first power level and providing the second power level.

[0024]

[24] Optionally, each intermediate power level is between the first power level and the second power level.

[0025]

[25] Optionally, instructions notify the user that the device is ready to use.

[0026]

[26] Optionally, the method further comprises supplying power to the heater during an operating phase, the operating phase following notification to the user.

[0027]

[27] Optionally, the first and second time periods are within a heating phase of the device.

[0028]

[28] According to a second aspect, there is provided a device configured to perform the method of the first aspect.

[0029]

[29] By providing a device and method according to the first or second aspect, the device may be configured to uniformly heat the consumable to a target temperature, thereby improving the user experience.

[0030]

[30] According to a third aspect of the present invention, there is provided a system comprising the device according to the second aspect and an aerosol-forming article. The aerosol-forming article may comprise an aerosol-forming substrate at an upstream end of the aerosol-forming article. The article may be in the form of a smoking substitute article, such as a heated tobacco (HT) consumable (also known as a heat-not-burn (HNB) consumable).

[0031]

[31] According to a fourth aspect of the present invention, there is provided a method of using a system according to the third aspect, the method comprising inserting an item into the device and operating the device in accordance with the method of the first aspect.

[0032]

[32] The device may include an elongated body. An end of the elongated 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 "heat-not-burn" and "heat-not-burn" are used interchangeably herein to describe a type of consumable that is heated rather than combusted (or to describe a device for use with such a consumable). The device may include a cavity configured to receive (i.e., engage with) at least a portion of the consumable. The aerosol-forming article may be of a type that includes an aerosol former (e.g., carried by an aerosol-forming substrate).

[0033]

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

[0034]

[34] The heater (and thus the heating element) may be rigidly attached to the body. The heating element may be elongated so as to define a longitudinal axis and may, for example, have a substantially circular transverse profile (i.e., transverse 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 transverse profile (i.e., the heater may be a "blade heater"). Alternatively, the heating element may be tubular in shape (i.e., the heater may be a "tubular heater"). The heating element may take other shapes (e.g., the heating element may have an oval transverse profile). The shape and / or size (e.g., diameter) of the transverse profile of the heating element may be generally consistent throughout (or substantially throughout) the length of the heating element.

[0035]

[35] The heating element may be 15mm to 25mm long, for example 18mm to 20mm long, for example about 19mm long. The heating element may have a diameter of 1.5mm to 2.5mm, for example 2mm to 2.3mm, for example about 2.15mm.

[0036]

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

[0037]

[37] The heating element may be located in a cavity (of the device) and may extend from the interior base of the cavity toward the opening of the cavity (e.g., along the longitudinal axis). The length of the heating element (i.e., the length along the longitudinal axis of the heater) may be less than the depth of the cavity. Thus, the heating element may extend over only a portion of the length of the cavity. That is, the heating element may not extend through (or beyond) the opening of the cavity.

[0038]

[38] The heating element may be configured to be inserted into the aerosol-forming article (e.g., an HT consumable) when the aerosol-forming article is received in the cavity. In that regard, the distal end of the heating element (i.e., distal from the base of the heating element attached to the device) may include a tapered portion, which may facilitate insertion of the heating element into the aerosol-forming article. When the aerosol-forming article is received in the cavity, the heating element may fully penetrate the aerosol-forming article. That is, the entire length or substantially the entire length of the heating element may be received in the aerosol-forming article.

[0039]

[39] The heating element can have a length that is less than or substantially the same as the axial length of the aerosol-forming substrate that forms part of the aerosol-forming article (e.g., an HT consumable). Thus, when such an aerosol-forming article is engaged with a device, the heating element can penetrate only the aerosol-forming substrate and not 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., its outer circumferential surface) to the surrounding aerosol-forming substrate. That is, heat can be transferred radially outward (in the case of a cylindrical heating element) or, for example, radially inward (in the case of a tubular heater).

[0040]

[40] When 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 a portion of the aerosol-forming article (i.e., heat that portion of the aerosol-forming article). In particular, the heating element can surround the aerosol-forming substrate of the aerosol-forming article. That is, when the aerosol-forming article is engaged with the device, the aerosol-forming substrate of the aerosol-forming article can be located 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.

[0041]

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

[0042]

[42] In some embodiments, the device can include a cap disposed on an end of the body configured to engage the aerosol-forming article. If the device includes a heater having a heating element, the cap can at least partially surround the heating element. The cap can be movable between an open position, in which access to the heating element is provided, and a closed position, in which the cap at least partially surrounds the heating element. The cap can be slidably engaged with the body of the device and can be slidable between the open and closed positions.

[0043]

[43] The cap can define at least a portion of the cavity of the device. That is, the cavity can be completely defined by the cap, or the cap and the body can each define a portion of the cavity. If the cap completely defines the cavity, the cap can include an opening for receiving a heating element into the cavity (when the cap is in the closed position). The cap can include an opening to the cavity. The opening can be configured to receive at least a portion of the aerosol-forming article. That is, the aerosol-forming article can be inserted into the cavity (engaged to the device) through the opening.

[0044]

[44] The cap may 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. That is, a portion of the aerosol-forming article (the portion not received in the cavity) may protrude from the opening (i.e., extend beyond the opening). This (protruding) portion of the aerosol-forming article may be the end (e.g., the mouth end) of the aerosol-forming article, which may be received in the user's mouth for the purpose of inhaling the aerosol formed by the device.

[0045]

[45] The device may include a power source or may be connectable to a power source (e.g., a power source separate from the device). The power source may be electrically connectable to the heater to provide power to the heating element. In that regard, changing (e.g., toggling) the electrical connection of the power source to the heater may affect the state of the heater. For example, toggling the electrical connection of the power source to the heater may toggle the heater between an on state and an off state. The power source may be a power store. For example, the power source may be a battery or a rechargeable battery (e.g., a lithium-ion battery). Furthermore, the power supply to the heating element may be controlled in a predefined manner. Upon activation of the device, a power supply of a first power level is provided to the heating element. The first power level is provided for a first time period. Furthermore, a power supply of a second power level is provided to the heating element. The second power level is provided for a second time period. By providing power at different power levels during the two time periods, uniform heating of consumables closer to and further from the heating element may be achieved. This provides an improved user experience. The first and second heating periods can define a heating phase of the device between the start of the first period and the completion of the second period. After the heating period, there can be an operating period during which the user is expected to draw on the consumable. During the heating period, the temperature of the heating element can be maintained at a target temperature.

[0046]

[46] The device may include an input connection (e.g., 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. The input connection may, in some cases, be used as a substitute for an internal power source (e.g., a battery or a rechargeable battery). That is, the input connection may be electrically connectable to a heater (to provide power to the heater). Thus, in some forms, the input connection may form at least a portion of the device's power source.

[0047]

[47] If 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.

[0048]

[48] ​​The device may include a user interface (UI). In some embodiments, the UI may include input means for receiving operational commands from a user. The input means of the UI may allow the user to control at least one aspect of the operation of the device. In some embodiments, the input means may include a power button for switching the device between an on state and an off state.

[0049]

[49] In some embodiments, the UI may additionally or alternatively include an output means for communicating information to a user. In some embodiments, the output means may include a light for indicating the status of the device (and / or the aerosol-forming article) to the user. The status of the device (and / or the aerosol-forming article) indicated to the user may include a status indicative of the operation 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 touchscreen, a switch, a light, or the like. For example, the output means may include one or more (e.g., two, three, four, etc.) light-emitting diodes ("LEDs"), which may be located on the body of the device. Once the heating phase is complete, an indication to the user that the device is ready may be provided via the output means.

[0050]

[50] The device may further include a puff sensor (e.g., an airflow sensor), which forms part of the input means of the UI. The puff sensor may be configured to detect when a user inhales at the end (i.e., the distal (oral) end) of the aerosol-forming article. The puff sensor may be, for example, a pressure sensor or a microphone. The puff sensor may be configured to generate a signal indicative of a puff state. The signal may indicate that a user has inhaled (aerosol from the aerosol-forming article), for example in the form of a binary signal. Alternatively, or in addition, the signal may indicate a characteristic of the inhalation (e.g., flow rate of the inhalation, length of time of the inhalation, etc.).

[0051]

[51] The device may include or be connectable to a controller, which may be configured to control at least one function of the device. The controller may include a microcontroller, which may be mounted, for example, on a printed circuit board (PCB). The controller may also include memory, for example, non-volatile memory. The memory may include instructions that, when executed, cause the controller to perform specific tasks or steps of a method. If the device includes an input connection, the controller may be connected to the input connection.

[0052]

[52] The controller may be configured to control the operation of the heater (and, for example, the heating element). Thus, the controller may be configured to control evaporation of an aerosol-forming portion of an aerosol-forming article engaged with the device. The controller may be configured to control the voltage applied to the heater by the power supply. For example, the controller may be configured to toggle between applying the full output voltage (of the power supply) to the heater and applying no voltage to the heater. Alternatively, or in addition, the control unit may implement more complex heater control protocols.

[0053]

[53] The device may further include a voltage regulator for regulating the output voltage provided by the power supply to form a regulated voltage, which may then be applied to the heater.

[0054]

[54] In some embodiments, if 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 an input means 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, can control the heater to a corresponding on or off state.

[0055]

[55] The controller may be configured to send output signals to components of the UI. The UI may be configured to communicate information to a user via the output means in response to such output signals (received from the controller). For example, if the device includes one or more LEDs, the LEDs may be operably connected to the controller. Thus, the controller may be configured to control the illumination of the LEDs (e.g., in response to the output signals). For example, the controller may be configured to control the illumination of the LEDs according to the state (e.g., on or off) of a heater.

[0056]

[56] If the device includes a sensor (e.g., a puff / airflow sensor), the controller may be operably connected to the sensor. The controller may be configured to receive a signal from the sensor (e.g., indicative of a state of the device and / or the engaged aerosol-forming article). The controller may be configured to control the heater or a configuration of the output means based on the signal from the sensor.

[0057]

[57] In some embodiments, the controller may be configured to control the power supply to the heating element when the device is activated during the heating phase. Thus, the device can achieve uniform heating of the consumable, thereby preventing the user from experiencing a burnt taste during the first inhale of the consumable.

[0058]

[58] The device may include a wireless interface configured to communicate with an external device wirelessly (e.g., via Bluetooth (e.g., a Bluetooth low energy connection) or Wi-Fi). Similarly, the input connection may be configured for a wired connection to an external device to provide communication between the device and the external device.

[0059]

[59] The external device may be a mobile device. For example, the external device may be a smartphone, a tablet, a smartwatch, or a smart car. The external device (e.g., a mobile device) may have an application (e.g., an app) installed on it. The application may facilitate communication between the device and the external device via a wired or wireless connection.

[0060]

[60] A wireless or wired interface may be configured to communicate signals between an external device and a controller of the device. In this regard, the controller may control the configuration of the device in response to signals received from the external device. Alternatively, or in addition, the external device may respond to signals received from the device (e.g., the controller of the device).

[0061]

[61] 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.

[0062]

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

[0063]

[63] To generate the aerosol, the aerosol-forming substrate contains at least one volatile compound that is intended to be vaporized / aerosolized and that, when inhaled, can provide a recreational and / or medicinal effect to the user. Suitable chemically and / or physiologically active volatile compounds include nicotine, cocaine, caffeine, opiates and opioids, cathine and cathinone, kavalactones, mysticin, beta-carboline alkaloids, and salvinorin A, along with any combinations, functional equivalents, and / or synthetic substitutes of the above.

[0064]

[64] The aerosol-forming substrate can include plant material. Plant materials include Amaranthus dubius, Arctostaphylos uva-ursi, Argemone mexicana, Amica, Artemisia vulgaris, Yellow Tees, Galea zacatechichi, Canavalia maritima (Baybean), Cecropia mexicana (Guamura), Cestrum. noctumum, Cynoglossum virginianum (wild comfrey), Cytisus scoparius, damiana, Entada rheedii, Eschscholzia califomica (California Poppy), Fittonia albivenis, Hippobroma longiflora, Humulus japonica (Japanese) Hops (Kanamugra)), Humulus lupulus (Hops), Lactuca virosa (Lettuce), Opium (Wild Lettuce), Laggera alata, Leonotis leonurus, Leonurus cardiaca (Motherwort), Leonurus sibiricus (Honeyweed), Lobelia cardinalis, Lobelia inflata (Indian-tobacco), Lobelia siphilitica, Nepeta cataria (Catnip), Nicotiana species (Tobacco), Nymphaea alba (White Lily), Nymphaea caerulea (Blue Lily), Opium poppy, Passiflora incamata (Passionflower), Pedicularis densiflora (Indian Warrior (Indian Warrior), Pedicularis groenlandica (Elephant'sHead (Elephant's Head), Salvia divinorum, Salvia dorrii (Tobacco Sage), Salvia spp. (Sage), Scutellaria galericulata, Scutellaria lateriflora, Scutellaria nana, Scutellaria spp. (Skullcap), Sida acuta (Wireweed), Sida rhombifolia, Silene capensis, Syzygium aromaticum (Clove), Tagetes lucida (Mexican Tarragon (Mint Marigold)), Tarchonanthus camphoratus, Tumera diffusa (Damiana), Mullein (Mullein), Zamia latifolia (Maconha The composition may include at least one plant material selected from the list including Maconha brava (Maconha brava), together with any combination, functional equivalent, and / or synthetic alternative of the above.

[0065]

[65] The plant material may be tobacco. Any type of tobacco may be used, including, but not limited to, pipe-cured, burley, Maryland, dark air-cured, Oriental, dark flue-cured, perique, and rustica. This also includes blends of the aforementioned tobaccos.

[0066]

[66] Tobacco can include one or more of leaf tobacco, stem tobacco, tobacco powder, tobacco dust, tobacco derivatives, expanded tobacco, homogenized tobacco, cut tobacco, extruded tobacco, cut rag tobacco, and / or reconstituted tobacco (e.g., slurry recon or paper recon).

[0067]

[67] The aerosol-forming substrate may comprise a collecting sheet of homogeneous (eg, paper / slurry recon) tobacco, or a collecting strip / strip formed from such a sheet.

[0068]

[68] The aerosol-forming substrate may include one or more additives selected from humectants, flavoring agents, fillers, aqueous / non-aqueous solvents, and binders.

[0069]

[69] Flavoring agents may be provided in solid or liquid form. Flavoring agents may include menthol, licorice, chocolate, fruit flavors (including, for example, citrus, cherry, etc.), vanilla, spices (e.g., ginger, cinnamon), and tobacco flavors. The flavoring agents may be uniformly dispersed throughout the aerosol-forming substrate or may be provided at discrete locations and / or varying concentrations throughout the aerosol-forming substrate.

[0070]

[70] The aerosol-forming substrate may be formed in a substantially cylindrical shape so that the article / consumable resembles a conventional cigarette. The aerosol-forming substrate may have a diameter of 5 to 10 mm, for example 6 to 9 mm or 6 to 8 mm, for example about 7 mm. The aerosol-forming substrate may have an axial length of 10 to 15 mm, for example 11 to 14 mm, such as about 12 or 13 mm.

[0071]

[71] The article / consumable may include at least one filter element. A terminal filter element may be located at the downstream / mouth end of the article / consumable.

[0072]

[72] The or at least one filter element (e.g., an end filter element) may be constructed from cellulose acetate or polypropylene tow. At least one filter element (e.g., an end filter element) may be constructed from activated carbon. At least one filter element (e.g., an end element) may be constructed from paper. The or each filter element may be at least partially (e.g., entirely) circumscribed by plug wrap, e.g., paper plug wrap.

[0073]

[73] A terminal filter element (the downstream end of the article / consumable) can be joined to an upstream element to form the article / consumable by a circumscribing tipping layer, e.g., a tipping paper layer. The tipping paper can have an axial length greater than the axial length of the terminal filter element, such that the tipping paper completely circumscribes the terminal filter element and the wrap layer surrounding any adjacent upstream elements.

[0074]

[74] In some embodiments, the article / consumable may include an aerosol cooling element adapted to cool the aerosol generated (by heat exchange) from the aerosol-forming substrate before it is inhaled by the user.

[0075]

[75] The article / consumable may 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 may include a paper tube. The spacer element may be circumscribed by a (paper) wrap layer.

[0076]

[76] According to a fourth aspect of the present invention, there is provided a method of using the system according to the third aspect, the method comprising inserting an aerosol-forming article into the device and heating the article using a heater in the device.

[0077]

[77] In some embodiments, the method can include inserting an article into a cavity within the body of the device, and penetrating the article into a heating element of the device as the article is inserted.

[0078]

[78] The present invention includes combinations of described embodiments and preferred features except where such combinations are expressly unacceptable or expressly avoided.

[0079]

[79] Those skilled in the art will recognize that, except where mutually exclusive, a feature or parameter described in connection with any one of the above embodiments may also apply to any other embodiment. Furthermore, except where mutually exclusive, any feature or parameter described herein may apply to any embodiment and / or may be combined with any other feature or parameter described herein. [Brief explanation of the drawings]

[0080]

[80] So that the present invention may be understood, and so that further aspects and features thereof may be realized, embodiments illustrating the principles of the invention will now be described in more detail, with reference to the accompanying drawings. [Figure 1A]

[81] Figure 1A is a schematic diagram of a smoking substitution system. [Figure 1B]

[82] Figure 1B is a schematic diagram of a variation of the smoking substitution system of Figure 1A. [Figure 2A]

[83] Figure 2A is a front view of a first embodiment of a smoking substitution system with a consumable engaged with the device. [Figure 2B]

[84] Figure 2B is a front view of a first embodiment of a smoking substitution system with the consumables detached from the device. [Figure 2C]

[85] Figure 2C is a cross-sectional view of a consumable of a first embodiment of a smoking substitution system. [Figure 2D]

[86] Figure 2D is a detailed view of the end of the device of the first embodiment of the smoking substitution system. [Figure 2E]

[87] Figure 2E is a cross-sectional view of a first embodiment of a substitute smoking system. [Figure 3]

[88] Figure 3 is a graph of different power levels supplied to the heater for different periods to provide user instructions. DETAILED DESCRIPTION OF THE INVENTION

[0081]

[89] Aspects and embodiments of the present invention are discussed below with reference to the accompanying figures. Further aspects and embodiments will be apparent to those skilled in the art. All documents mentioned in this text are incorporated herein by reference.

[0082] 1A is a schematic diagram providing a general overview of a smoking substitution system 100. The system 100 includes a substitute smoking device 101 and an aerosol-forming article in the form of a consumable 102, which includes an aerosol former 103. The system is configured to vaporize the aerosol former 103 by heating the aerosol former 103 (forming a vapor / aerosol for inhalation by a user).

[0083]

[91] In the system shown, heater 104 forms part of consumable 102 and is configured to heat aerosol former 103. In this variation, heater 104 is electrically connectable to power source 105, for example, when consumable 102 is engaged with device 101. Heat from heater 104 causes aerosol former 103 to evaporate, producing vapor. The vapor then condenses to form an aerosol, which is ultimately inhaled by a user.

[0084]

[92] System 100 further includes a power source 105, which forms part of device 101. In other embodiments, power source 105 may be located external to (but connectable to) device 101. Power source 105 may be electrically connectable to heater 104 such that power source 105 may provide electrical power to heater 104 (i.e., for heating aerosol formation body 103). Controlling the electrical connection of power source 105 to heater 104 thus provides control of the state of heater 104. Power source 105 may be a power store, such as a battery or a rechargeable battery (e.g., a lithium-ion battery).

[0085]

[93] The system 100 further includes an I / O module including a connector 106 (e.g., in the form of a USB port, a Micro USB port, a USB-C port, etc.). The connector 106 is configured to connect to an external power source, such as a power outlet. The connector 106 may be used as a substitute for the power source 105; that is, the connector 106 may be electrically connectable to the heater 104 to provide electricity to the heater 104. In such an embodiment, the device may not include a power source; instead, the power source of the system may include the connector 106 and the external power source (with the connector 106 providing the electrical connection).

[0086]

[94] In some embodiments, connector 106 may be used to charge and recharge power source 105 if power source 105 includes a rechargeable battery.

[0087]

[95] System 100 also includes a user interface (UI) 107. Although not shown, UI 107 may include input means for receiving commands from a user. The input means of UI 107 allows a user to control at least one aspect of the operation of system 100. The input means may be in the form of, for example, buttons, a touch screen, switches, a microphone, etc.

[0088]

[96] The UI 107 also includes output means for communicating information to the user. The output means may include, for example, lights (e.g., LEDs), a display screen, a speaker, a vibration generator, etc.

[0089]

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

[0090]

[98] Although not shown, the system 100 may also include a voltage regulator for adjusting the output voltage from the power supply 105 to form a regulated voltage. The regulated voltage may then be applied to the heater 104.

[0091]

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

[0092]

[0100] Figure 1B is a schematic diagram illustrating a variation of the system 100 of Figure 1A. In the system 100' of Figure 1B, the heater 104 forms part of the device 101 rather than the consumable 102. In this variation, the heater 104 is electrically connected to a power source 105.

[0093]

[0101] 2A and 2B illustrate a heated tobacco (HT) smoking substitute system 200. The system 200 is an example of the system 100, 100' described in connection with FIG. 1A or FIG. 1B. The system 200 includes an HT device 201 and an HT consumable 202. The description of FIGS. 1A and 1B above is also applicable to the system 200 of FIGS. 2A and 2B and therefore will not be repeated.

[0094]

[0102] The device 201 and the consumable 202 are configured such that the consumable 202 can be engaged with the device 201. Figure 2A shows the device 201 and the consumable 202 in an engaged state, and Figure 2B shows the device 201 and the consumable 202 in a detached state.

[0095]

[0103] Device 201 includes a body 209 and a cap 210. In use, cap 210 is engaged at an end of body 209. Although not apparent from these views, cap 210 is movable relative to body 209. In particular, cap 210 is slidable and can slide along the longitudinal axis of body 209.

[0096]

[0104] The device 201 includes output means (forming part of the UI of the device 201) in the form of a plurality of light emitting diodes (LEDs) 211 arranged in a linear fashion on the outer surface of the body 209 of the device 201 along the longitudinal axis of the device 201. A button 212 is also arranged on the outer surface of the body 209 of the device 201 and is spaced axially (i.e., along the longitudinal axis) from the plurality of LEDs 211.

[0097]

[0105] 2C shows a detailed cross-sectional view of the consumable 202 of the system 200. The consumable 202 generally resembles a cigarette. In that 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 can further include a cooling element. The cooling element can exchange heat with the vapor formed by the aerosol-forming substrate 213 to cool the vapor to facilitate condensation of the vapor.

[0098]

[0106] The aerosol-forming substrate 213 is substantially cylindrical and is located at the upstream end 217 of the consumable 202, and comprises the aerosol former of the system 200. At that point, the aerosol-forming substrate 213 is configured to be heated by the device 201 to emit a vapor. The emitted vapor is then entrained in an airflow that flows through the aerosol-forming substrate 213. The airflow is created by the action of a user inhaling at the downstream end 218 (i.e., the distal or mouth end) of the consumable 202.

[0099]

[0107] In this embodiment, the aerosol-forming substrate 213 comprises a tobacco material, which may include, for example, any suitable part of a tobacco plant (e.g., leaves, stems, roots, husks, seeds, and flowers). The tobacco may include one or more of leaf tobacco, stem tobacco, tobacco powder, tobacco dust, tobacco derivatives, expanded tobacco, homogenized tobacco, cut tobacco, extruded tobacco, cut rag tobacco, and / or reconstituted tobacco (e.g., slurry recon or paper recon). For example, the aerosol-forming substrate 213 may include a collecting sheet of homogenized (e.g., paper / slurry recon) tobacco, or collecting strips / chipped strips formed from such a sheet.

[0100]

[0108] To generate an aerosol, the aerosol-forming substrate 213 includes at least one volatile compound that is intended to be evaporated / aerosolized and that, when inhaled, can provide a recreational and / or medicinal effect to the user. The aerosol-forming substrate 213 can further include one or more additives. For example, such additives may be in the form of a humectant (e.g., propylene glycol and / or vegetable glycerin), flavorings, fillers, aqueous / non-aqueous solvents, and / or binders.

[0101]

[0109] The terminal 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 terminal filter element 214 is in the form of a hollow filter element with holes 219 (e.g., for airflow) formed therein. The holes 219 have a diameter of 2 mm. The terminal filter element 214 is formed from a porous (e.g., monoacetate) filter material. As mentioned above, the downstream end 218 of the consumable 202 (i.e., where the terminal filter 214 is located) forms the mouthpiece portion of the consumable 202 through which the user inhales. Airflow is drawn from the upstream end 217, through the components of the consumable 202, and out the downstream end 218. The airflow is driven by the user inhaling at the downstream end 218 (i.e., the mouthpiece portion) of the consumable 202.

[0102]

[0110] The upstream filter element 215 is located axially adjacent to the aerosol-forming substrate 213, between the aerosol-forming substrate 213 and the terminal filter element 214. Like the terminal filter 214, the upstream filter element 215 is in the form of a hollow filter element, with holes 220 extending axially therethrough. In this manner, the upstream filter 215 can act as an airflow restrictor. The upstream filter element 215 is formed from a porous (e.g., monoacetate) filter material. The holes 220 of the upstream filter element 215 have a larger diameter (3 mm) than those of the terminal filter element 214.

[0103]

[0111] Spacer 216 is in the form of a paper tube and defines a cavity or chamber between upstream filter element 215 and terminal filter element 214. Spacer 216 acts to allow both cooling and mixing of the vapor / aerosol from aerosol-forming substrate 213. The spacer has an outer diameter of 7 mm and an axial length of 14 mm.

[0104]

[0112] Although it is not apparent from these figures, the aerosol-forming substrate 213, the upstream filter 215, and the spacer 216 are circumscribed by a paper wrap layer. The terminal filter 214 is circumscribed by a tip layer, which also circumscribes a portion of the paper wrap layer (to connect the terminal filter 214 to the remaining components of the consumable 202). The upstream filter 215 and the terminal filter 214 are circumscribed by a further wrap layer in the form of plug wrap.

[0105]

[0113] Referring again to the device 201, FIG. 2D shows a detailed view of the end of the device 201 configured to engage the consumable item 202. The cap 210 of the device 201 includes an opening 221 to an internal cavity 222 defined by the cap 210 (as is more apparent from FIG. 2D). The opening 221 and cavity 222 are formed to receive at least a portion of the consumable item 202. When the consumable item 202 is engaged with the device 201, a portion of the consumable item 202 is received into the cavity 222 through the opening 221. After engagement (see FIG. 2B), the downstream end 218 of the consumable item 202 protrudes from the opening 221 and thus from the device 201. The opening 221 includes laterally disposed notches 226. When the consumable item 202 is received in the opening 221, these notches 226 remain open and can be used, for example, to hold a cover to cover the end of the device 201.

[0106]

[0114] 2E shows a cross-sectional view of a central longitudinal plane through the device 201. The device 201 is shown with a consumable 202 engaged.

[0107]

[0115] The device 201 includes a heater 204, which includes a heating element 223. The heater 204 forms part of the body 209 of the device 201 and is rigidly attached to the body 209. In the embodiment shown, the heater 204 is a rod heater, and the heating element 223 has a circular transverse profile. In other embodiments, the heater may be in the form of a blade heater (e.g., a heating element having a rectangular transverse profile) or a tubular heater (e.g., a heating element having a tubular shape).

[0108]

[0116] The heating element 223 of the heater 204 protrudes from the interior base of the cavity 222 along the longitudinal axis toward the opening 221. As can be seen from this view, the length of the heating element (i.e., the length along the longitudinal axis) is less than the depth of the cavity 222. In this manner, the heating element 223 does not protrude from or extend beyond the opening 221.

[0109]

[0117] When the consumable 202 is received in the cavity 222 (as shown in FIG. 2E ), the heating element 223 penetrates the aerosol-forming substrate 213 of the consumable 202. In particular, when inserted, the heating element 223 extends along substantially the entire axial length of the aerosol-forming substrate 213. Thus, when the heater 204 is activated, heat is transferred radially from the outer circumferential surface of the heating element 223 to the aerosol-forming substrate 213. When the device 201 is activated, power may be supplied to the heating element 223 to increase the temperature of the consumable 202 from room temperature to a target temperature. This is the heating phase. The target temperature is the temperature of the consumable 202 when aerosol is generated and the user draws on the consumable.

[0110]

[0118] When a single high power is provided to reach the target temperature, the heating element 223 may heat up quickly. For example, an outer region of the consumable 202 away from the heating element 223 may remain cool, while an inner region of the consumable 202 closer to the heating element 223 may heat up to the target temperature. When the outer region heats up to reach the target temperature, the inner region may burn. This may cause the user to experience a burnt taste on the first inhale of the aerosol.

[0111]

[0119] To avoid experiencing a burnt taste, the heating element 223 may be heated from room temperature to a target temperature using two power levels, which allows sufficient time for heat transfer from the portion of the consumable 202 closest to the heating element 223 to the portion of the consumable farther from the heating element, thereby providing more uniform heating of the aerosol-forming substrate.

[0112]

[0120] The device 201 further includes an electronics cavity 224. Located in the electronics cavity 224 is a power source in the form of a rechargeable battery 205 (a lithium ion battery).

[0113]

[0121] The device 201 includes a connector (i.e., forming part of the IO module of the device 201) in the form of a USB port 206. For example, the connector may alternatively be, for example, a micro USB port or a USB-C port. The USB port 206 may be used to recharge the rechargeable battery 205.

[0114]

[0122] Device 201 includes a controller (not shown) located in electronics cavity 224. The controller includes a microcontroller mounted on a printed circuit board (PCB). USB port 206 is also connected to controller 208 (i.e., connected to the PCB and the microcontroller).

[0115]

[0123] 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. Such control of the operation of the heater 204 may be achieved by the controller toggling an electrical connection of the rechargeable battery 205 to the heater 204. For example, the controller 208 is configured to control the heater 204 in response to a user pressing a button 212. Pressing the button 212 may cause the controller to apply voltage (from the rechargeable battery 205) to the heater 204 (heating the heating element 223).

[0116]

[0124] The controller is configured to control a power source that supplies power to the heating element 223. The controller may be configured to control the supply of power at at least two power levels to heat the heating element 223 from ambient temperature to a target temperature. Upon activation of the device 201, a first power level may be supplied to the heating element 223 of the device 201 for a first period of time. The controller monitors the duration of the supply of the first power level. Upon completion of the first period of time, the controller supplies a second power level to the heating element 223 for a second period of time. The first power level is greater than the second power level.

[0117]

[0125] 3 is a graph illustrating control of power supply to heating element 223 upon activation of device 201. In some embodiments, the first period is different from the second period. In some embodiments, the second period occurs after the first period. In some embodiments, one or more of the first power level, the second power level, the first period, and the second period may be predefined.

[0118]

[0126] In some embodiments, the device can implement one or more intermediate power supply periods between the first period and the second period. Each intermediate power supply period has a respective intermediate power level. The intermediate power level of the intermediate power period may decrease stepwise between the first power level and the second power level. Each intermediate power period has a respective duration (or period). The durations of any intermediate power periods may be equal to or different from one another.

[0119]

[0127] For example, consider a target temperature to be reached of 300 degrees Celsius. The first power level and the second power level may each be predefined. The first time period and the second time period may also each be predefined. For example, to achieve a target temperature of 300 degrees Celsius, the first power level may be predefined such that the consumable is heated at a first power for 10 seconds and then at a second, lower power for 15 seconds. The first time period may be predefined, but the second time period is not. For example, the second time period may depend on the time it takes for the measured temperature of the heater to reach the target temperature (which may depend, for example, on environmental conditions). By heating in two stages, the target temperatures may be achieved in both the inner and outer regions of the consumable 202 without overheating the inner region.

[0120]

[0128] Upon completion of the second time period, the device 201 may indicate to the user that the pre-heating phase is complete. In some embodiments, the device 201 may include an indication unit for indicating completion to the user. In some embodiments, the indication may include a notification that the device 201 is ready to be used. An output means associated with the device 201 may be used for the indication. In some embodiments, the indication may be provided via a display screen associated with the device 201. In some embodiments, the indication may be provided via illumination of an LED associated with the device 201. In some embodiments, the device 201 may be configured to vibrate to indicate that the device 201 is ready to be used. One or more other means known to those skilled in the art for providing an indication to a user may be implemented as an indication unit within the device 201. The controller is also configured to control the LED 211 in response to (e.g., a detected) state of the device 201 or the consumable 202. For example, the controller may control the LEDs to indicate whether the device 201 is in an on state or an off state (e.g., when the device is in an on state, one or more of the LEDs may be lit by the controller).

[0121]

[0129] The device 201 includes a further input means (i.e., in addition to the button 212) in the form of a puff sensor 225. The puff sensor 225 is configured to detect when a user draws (i.e., inhales) on the downstream end 218 of the consumable 202. The puff sensor 225 may be in the form of a pressure sensor, a flow meter, or a microphone, for example. The puff sensor 225 is operably connected to the controller 208 within the electronics cavity 224, such that a signal from the puff sensor 225 indicative of a puff state (i.e., inhalation or not inhalation) forms an input to (and may therefore be responded to by) the controller 208.

[0122]

[0130] The features disclosed in the above description, or the following claims, or the accompanying drawings, are appropriately expressed in their specific form, or in terms of means for performing a disclosed function, or a method or process for obtaining a disclosed result, and may be utilized separately or in any combination of such features to realize the invention in its many and varied forms.

[0123]

[0131] While the present invention has been described in conjunction with the exemplary embodiments set forth above, many equivalent modifications and variations will be apparent to those skilled in the art given this disclosure. Accordingly, the exemplary embodiments of the invention set forth above are considered to be illustrative rather than restrictive. Various changes may be made to the described embodiments without departing from the spirit and scope of the invention.

[0124]

[0132] For the avoidance of any doubt, any theoretical explanations provided herein are provided for the purpose of improving the understanding of the reader, and the inventors do not wish to be bound by any of these theoretical explanations.

[0125]

[0133] All headings used herein are for organizational purposes only and are not to be construed as limiting the subject matter described.

[0126]

[0134] Throughout this specification, including the claims which follow, unless the context requires otherwise, the words "have," "comprise," and "include," as well as variations such as "having," "comprises," "comprising," and "including," will be understood to imply the inclusion of a stated integer or step or group of integers or steps, but not the exclusion of any other integer or step or group of integers or steps.

[0127]

[0135] It should be noted that as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. As used herein, ranges may be expressed as from "about" one particular value and / or to "about" another particular value. When such a range is expressed, another embodiment includes from the one particular value and / or to the other particular value. Similarly, by use of the prefix "about," when values ​​are expressed as approximations, it will be understood that the particular value forms another embodiment. The term "about" in connection with numerical values ​​is optional and means, for example, ±10%.

[0128]

[0136] The words "preferred" and "preferably" are used herein to refer to embodiments of the invention that may provide certain benefits, under some circumstances. It is understood, however, that other embodiments may also be preferred, under the same or different circumstances. Thus, reference to one or more preferred embodiments does not mean or imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the present disclosure or the claims.

Claims

1. 1. A method of operating a non-combustion heated device, comprising: upon activation of the device, supplying a first power level to a heating element of the device for a first time period; after the first period of time, supplying a second power level to the heating element for a second period of time; providing instructions to a user of the device after completion of the second period of time; Including, the first power level is greater than the second power level; method.

2. The method of claim 1 , wherein the prompt is an instruction informing the user that the device is ready for use.

3. 3. The method of claim 1 or 2, wherein the first and second time periods are within a heating phase of the device, and the method further comprises supplying power to a heater during an operating phase, the operating phase following notification to the user.

4. 4. The method of claim 1, wherein the first power level and the second power level are configured to increase the temperature of the heating element from room temperature at the start of the first time period to a target temperature for generating an aerosol from the aerosol-forming article at the end of the second time period.

5. The method of claim 1 , wherein the first power level and the second power level are supplied by a single power supply of the device.

6. 6. The method of claim 1, wherein the second period of time depends on the time it takes for the measured temperature of the heating element to reach a target temperature.

7. The method of claim 1 , wherein the first period of time is longer than the second period of time.

8. The method of claim 1 , wherein the first period of time is shorter than the second period of time.

9. 9. The method of claim 1, further comprising supplying at least one intermediate power level to the heating element for a respective intermediate period between the first period and the second period, each respective intermediate power level being between the first power level and the second power level.

10. 10. The method of claim 9, further comprising providing the at least one intermediate power level between providing the first power level and providing the second power level.

11. The method of claim 10 , wherein each intermediate power level is between the first power level and the second power level.

12. A non-combustion heating device configured to carry out the method of any one of claims 1 to 11.

13. The non-combustion heated device according to claim 12, comprising only one heating element for heating the aerosol-forming article.

14. A device according to claim 12 or 13; an aerosol-forming article; Substitute smoking system including.

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

16. 16. A method of using a system according to claim 14 or 15, comprising the steps of: Inserting an item into the device; and operating a device according to any one of claims 1 to 11.

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