TW202038782A - Heater for smoking substitute system - Google Patents

Abstract

A heater for a heat not burn device, comprising a rod portion with a heating track located thereon and a coating formed from silica. The coating forms an external surface of a portion of the heater for heating tobacco in a consumable for engagement with the device. By providing a heater for a heat not burn device comprising a coating formed from silica, deposition of residues on the heater can be avoided or minimized. Reduction in deposition of residue may result in cleaner system requiring less downtime for cleaning, reduction in burnt odour from the device, thus improving overall user experience with the heat not burn device. Further, reduction in deposition of residues on the heater may also provide for improvement in performance and/or life of the heater by protecting the heating element.

Description

Heater for smoking alternative system

The present invention is related to smoking replacement systems, and particularly (but not exclusively) to heaters for smoking replacement systems.

It is generally believed that smoking grass exposes smokers to potentially harmful substances. It is generally believed that a large amount of potentially harmful substances are produced through the heat caused by the burning and/or burning of tobacco and the burning tobacco components in the tobacco smoke itself.

Conventional flammable smoking products (such as cigarettes) generally include cylindrical tobacco rods and usually also cylindrical filters. Cylindrical tobacco rods include shredded tobacco surrounded by wrapping paper, and the filter is adjacent to the wrapped tobacco rod. Align the ground axis. Filters generally include filter material enclosed by a plug sleeve. The wrapped tobacco rod and the filter are joined together by a wrapped tipping paper tape, which wraps the entire length of the filter and the adjacent part of the wrapped tobacco rod. This conventional cigarette is used by igniting the end opposite to the filter and burning the tobacco rod. Smokers receive mainstream smoke into their mouths by smoking at the mouth end or filter end of the cigarette.

It is known that the burning of organic materials (such as tobacco) produces tar and other potentially harmful by-products. Various smoking alternative systems (or "alternative smoking systems") have been proposed to avoid smoking grass.

This type of smoking replacement system can form part of nicotine replacement therapy, which is aimed at people who want to stop smoking and overcome their dependence on nicotine.

Smoking alternative systems include electronic systems that allow users to simulate smoking by generating smoke (also called "vapor"). The smoke is drawn into the lungs through the mouth (inhalation) and then exhaled. Inhaled smoke generally contains nicotine and/or flavoring agents, which do not have or have less odor and health risks associated with traditional smoking.

In general, the smoking substitution system aims to provide alternatives to smoking rituals, while at the same time providing a similar experience to users and providing satisfaction to those who have experience in traditional smoking and flammable tobacco products. Some smoking replacement systems use smoking replacement products (also called "consumables") that are designed to resemble traditional cigarettes that are cylindrical in form and have a mouthpiece at one end.

In the past few years, the popularity and use of smoking alternative systems has grown rapidly. Although originally marketed as an aid to habitual smokers who wish to quit smoking, consumers increasingly regard the smoking alternative system as a desirable lifestyle accessory.

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

One method used for smoking alternative systems is the so-called heated tobacco ("HT") method, in which tobacco (rather than "e-liquid") is heated or warmed to release vapor. HT is also called "heat not burn" ("HNB"). The tobacco can be tobacco leaf or reconstituted tobacco. The vapor may contain nicotine and/or flavoring agents. In the HT method, the intention is that the tobacco is heated but not ignited, that is, the tobacco does not experience combustion.

A typical HT smoking replacement system can include equipment and consumables. The consumable may include tobacco material. The equipment and consumables can be configured to be physically coupled together. In use, the heating element of the device can be used to impart heat to the tobacco material, wherein the air flow through the tobacco material causes the components in the tobacco material to be released as vapor. The vapor may also be formed by a carrier in the tobacco material (this carrier may, for example, include propylene glycol and/or vegetable glycerin) and additional volatile compounds released from the tobacco. The released vapor can be entrained in the air stream drawn through the tobacco.

As the vapor passes through the consumable (entrained in the air stream) from the vaporization position to the outlet of the consumable (such as the mouthpiece of the cigarette holder), the vapor cools and condenses to form smoke for users to inhale. Smoke will usually contain volatile compounds.

In the HT smoking replacement system, it is believed that heating rather than igniting the tobacco material causes fewer or smaller amounts of the more harmful compounds that are usually produced during smoking. Thus, the HT method can reduce the odor and/or health risks that may be caused by the ignition, combustion, and pyrolysis degradation of tobacco.

It may be necessary to improve the design of smoking replacement systems (especially HT smoking replacement systems) to enhance user experience and improve the function of HT smoking replacement systems.

This disclosure is designed in view of the above considerations.

In the broadest sense, the present invention relates to a heater for heating non-burning equipment. The heater includes a coating of silicon oxide on the outer surface of the heater.

According to a first aspect of the present invention, there is provided a heater for heating non-combustion equipment, comprising: a rod portion having a heating rail on the rod portion; and a coating layer formed of silicon oxide. The coating forms the outer surface of a portion of the heater used to heat the tobacco in the consumable for engagement with the device.

By providing a heater for heating non-combustion equipment and including a coating formed of silicon oxide, it is possible to avoid or minimize the deposition of residues on the heater. Reducing the deposition of residues can result in a cleaner system that requires less downtime for cleaning, reducing combustion odors from the equipment, and therefore improving the overall user experience of the heat-not-burn equipment. Further, reducing the deposition of residues on the heater can also improve the performance and/or life of the heater by protecting the heating element.

The optional features will now be listed. These features are applicable individually or in any combination with any aspect.

Optionally, the shaft includes a ceramic core.

Optionally, the ceramic core includes Al ₂ O ₃ . The core can be formed mostly or only by Al ₂ O ₃ .

Optionally, the heating rail extends along the longitudinal axis of the rod to form a heating part of the heater.

Optionally, the shaft includes a tapered distal tip.

Optionally, the tapered distal tip is tapered.

Optionally, a tapered distal tip is attached to the shaft.

Optionally, the coating covers at least the heated portion and the tapered distal tip.

Optionally, the heater includes a stand at the proximal end of the stem for attachment to the device.

Optionally, the support is formed on a part of the coating.

Optionally, the thickness of the coating is greater than the maximum surface deviation of the rod.

Optionally, the thickness of the coating is greater than the arithmetic mean roughness of the rod.

Optionally, the thickness of the coating is greater than the root mean square roughness of the rod.

Optionally, the rod includes a rail layer, and the heating rail is formed on the rail layer.

Optionally, the track layer includes a temperature measurement track.

Optionally, the thickness of the coating is 5 to 25 microns, optionally 5 to 15 microns, optionally substantially 10 microns.

Optionally, the rod is immersed in silicon oxide to form a coating.

Optionally, the coating has a uniform thickness on the cone and rod.

In a second aspect, there is provided a heating and non-combustion device including the heater as disclosed herein.

The device may include an elongated body. The end of the elongate body can be configured for engagement with an aerosol forming article. For example, the main body may be configured to engage with heating tobacco (HT) consumables (or heating not burn (HNB) consumables). The terms "heated tobacco" and "heat not burn" are used interchangeably herein to describe the type of consumable that is heated rather than burned (or used interchangeably to describe equipment for use with such consumables). The device may include a cavity configured to receive at least a portion of the consumable (ie for engaging with the consumable). The aerosol forming article may be of a type that includes an aerosol forming agent (for example, an aerosol forming agent carried by an aerosol forming substrate).

The device may include a heater for heating the aerosol forming article. The heater may include a heating element in the form of a rod extending from the main body of the device. The heating element may extend from the end of the main body configured for engagement with the aerosol forming article.

The heater (and therefore the heating element) can be rigidly mounted to the main body. The heating element may be elongated so as to define a longitudinal axis, and may for example have a substantially circular transverse profile (ie transverse to the longitudinal axis of the heating element) (ie the heating element may be substantially cylindrical). Alternatively, the heating element may have a rectangular transverse profile (ie the heater may be a "blade heater"). Alternatively, the heating element may be in the shape of a tube (ie, the heater may be a "tube heater"). The heating element may take other forms (for example, the heating element may have an oval transverse profile). The shape and/or size (for example, diameter) of the lateral profile of the heating element may be approximately the same for the entire length (or substantially the entire length) of the heating element.

The length of the heating element may be between 15 mm and 25 mm, for example between 18 mm and 20 mm, for example about 19 mm. The diameter of the heating element may be between 1.5 mm and 2.5 mm, for example between 2 mm and 2.3 mm, for example about 2.15 mm.

The heating element may be formed of ceramic. The heating element may include a core containing Al ₂ O ₃ (for example a ceramic core). The core of the heating element may have a diameter of 1.8 mm to 2.1 mm (for example between 1.9 mm and 2 mm). The heating element may include an outer layer (for example, an outer ceramic layer) containing Al ₂ O ₃ . The thickness of the outer layer may be between 160 μm and 220 μm, for example between 170 μm and 190 μm, for example about 180 μm. The heating element may include a heating rail, which may extend longitudinally along the heating element to form a heating portion of the heater. The heating rail can be sandwiched between the outer layer of the heating element and the core. The heating rail may include tungsten and/or rhenium. The heating rail may have a thickness of about 20 μm. The heating rail can provide uniform heating across the length of the heating element. Further, the heating element may include a rail layer, and the heating rail is formed on the rail layer. The rail layer can be configured to detect and/or monitor various parameters related to the heating element or its environment. In one embodiment, the track layer may be a temperature measuring track. The temperature measurement rail can facilitate the detection and monitoring of the temperature at different lengths of the heating rail.

The heating element may be located in the cavity (of the device) and may extend from the inner base of the cavity towards the opening of the cavity (for example along the longitudinal axis). The length of the heating element (ie, the length along the longitudinal axis of the heater) may be less than the depth of the cavity. Therefore, the heating element may only extend up to a part of the length of the cavity. That is, the heating element may not extend through (or beyond) the opening of the cavity.

The heating element may be configured to be inserted into the aerosol-forming article (eg, HT consumable) when the aerosol-forming article is received in the cavity. In that regard, the distal end of the heating element (ie the distal end relative to the base of the heating element where the heating element is mounted to the device) can include a tapered portion, which can facilitate the insertion of the heating element into the aerosol forming article in. The heating element can completely penetrate the aerosol-forming article when it is received in the cavity. That is, the entire length or substantially the entire length of the heating element can be received in the aerosol-forming article.

The heating element may have a length that is less than or substantially the same as the axial length of the aerosol-forming substrate, which forms part of the aerosol-forming article (eg, HT consumable). Therefore, when such an aerosol-forming article is joined to a device, the heating element can only penetrate the aerosol-forming substrate and not other parts of the aerosol-forming article. The heating element can penetrate the aerosol-forming substrate up to substantially the entire axial length of the aerosol-forming substrate of the aerosol-forming article. Therefore, when the heating element penetrates the aerosol-forming substrate, heat can be conducted from the heating element (for example, the outer peripheral surface of the heating element) to the surrounding aerosol-forming substrate. That is, the heat can be conducted radially outwards (in the case of cylindrical heating elements) or, for example, radially inwards (in the case of tubular heaters).

If the heater is a tube heater, the heating element of the tube heater may surround at least a part of the cavity. When a portion of the aerosol-forming article is received in the cavity, the heating element may surround a portion of the aerosol-forming article (ie in order to heat that portion of the aerosol-forming article). In detail, the heating element may surround the aerosol-forming substrate of the aerosol-forming article. In other words, when the aerosol-forming product is joined to the device, the aerosol-forming substrate of the aerosol-forming product can be located near the inner surface of the (tubular) heating element. When the heating element is activated, heat can be conducted radially inward from the inner surface of the heating element to heat the aerosol forming substrate.

The cavity may comprise (for example circumferential) one or more walls, and the (tubular) heating element may extend around at least a part of the one or more walls. 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. One or more walls of the cavity may be formed of a thermally conductive material (such as metal) to allow heat conduction from the heating element to the aerosol forming article. Therefore, heat can be conducted from the heating element through one or more cavity walls to the aerosol-forming substrate of the aerosol-forming article received in the cavity.

The heater may further include a support at the proximal end of the heating element. The support can facilitate the installation of the heating element in the device. The support may be formed on a part of the coating. The support can be configured to fit in the body of the device. The support may provide a larger surface area for joining the heater to the main body of the device to ensure that the heater is firmly fitted in the main body. The support can be formed of any suitable material, such as zirconia.

The heater has a coating formed of silicon oxide. The coating may form at least a part of the outer surface of the heater. The silicon oxide coating can provide a non-stick outer surface of the heater. The coating can prevent or minimize the deposition of residues on the outer surface. The coating can be formed by a dipping process. For example, the coating can be formed by a low-temperature dipping process. The coating can form a glaze layer on the outer layer of the heater. A part of the rod of the heating element can be dipped into silicon oxide to form a coating.

The coating may cover at least a part of the rod of the heating element. The rod may have a tapered distal tip. The tapered distal tip can facilitate penetration of the aerosol forming substrate by the heater. The tapered distal tip may be tapered in shape and/or the tapered distal tip may be attached to the heating element. The tip of the tapered distal tip can be inserted into the aerosol-forming substrate by pushing the aerosol-forming substrate on the tip of the heater. The tapered tip can guide the heater inside the substrate while the heater is inserted in the aerosol forming substrate. The tapered distal tip can be formed of any suitable material, such as zirconia. In addition to a part of the rod, the coating may also cover the tapered distal tip of the rod. The tapered distal tip can be attached to the distal end of the rod of the heating element as shown in FIG. 3. In one embodiment, the tapered distal tip may be integrally formed with the rod. The coating may cover at least the heated portion and the tapered distal tip. The coating on the heating part of the rod and on the tapered distal tip can protect at least the part of the heating element that contacts the aerosol-forming substrate and prevent residues from being deposited on the heating element. In one embodiment, the support may be formed on a part of the coating.

The coating may have a thickness of 5-30 μm. In one embodiment, the thickness of the coating may be 5-15 μm. In one embodiment, the thickness of the coating may be substantially 10 μm. The term "substantially" in this article is used to include a change of 10-25% of the indicated value. In one embodiment, the thickness of the coating may be greater than the maximum surface deviation of the rod. Making the thickness of the coating greater than the maximum surface deviation can ensure that the heating element is completely covered by the coating and that no surface of the heating element is exposed. In one embodiment, the thickness of the coating may be greater than the arithmetic average roughness of the rod. In yet another embodiment, the thickness of the coating may be greater than the root mean square roughness of the rod. Making the thickness of the coating greater than the average roughness or the root mean square of the roughness can ensure that the coating has a sufficient thickness to completely cover the surface of the heating element. In both cases, the coating can smooth the irregularities of the surface structure in order to obtain a substantially smooth and uniform or uniformly shaped surface. Such a smoothed surface reduces the accumulation of residues or debris from the tobacco material on the surface and allows easier installation and removal of consumables to be penetrated by the heating element.

In some embodiments, the device may include a top cover provided at the end of the main body, the top cover configured for engagement with the aerosol forming article. If the device includes a heater with a heating element, the top cover may at least partially surround the heating element. The top cover is movable between an open position and a closed position. In the open position, the inlet and outlet are provided to the heating element. In the closed position, the top cover at least partially surrounds the heating element. The top cover can be slidably engaged with the main body of the device, and can be slidable between an open position and a closed position.

The top cover may define at least a part of the cavity of the device. That is, the cavity may be completely defined by the top cover, or each of the top cover and the main body may define a part of the cavity. If the top cover completely defines the cavity, the top cover may include holes for receiving the heating element into the cavity (when the top cover is in the closed position). The top cover may include an opening to the cavity. The opening may be configured to receive at least a portion of the aerosol forming article. That is, the aerosol-forming product can be inserted through the opening and inserted into the cavity (so as to engage with the device).

The top cover may be configured such that when the aerosol-forming article is engaged with the device (eg, received in the cavity), only a portion of the aerosol-forming article is received in the cavity. That is, a part of the aerosol-forming article (the part that is not received in the cavity) may protrude from the opening (ie, extend beyond the opening). This (protruding) part of the aerosol-forming article may be the terminal (eg mouth) end of the aerosol-forming article, which is received in the user's mouth for the purpose of inhaling the smoke formed by the device.

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

Devices can include input connections (eg, USB ports, micro USB ports, USB-C ports, etc.). The input connection can be configured for connection to an external power source, such as a main power supply socket. In some cases, the input connection can be used as an alternative to internal power sources such as batteries or rechargeable batteries. That is, the input connection can be electrically connected to the heater (to provide power to the heater). Therefore, in some forms, the input connection may form at least part of the power supply of the device.

If the power source includes a rechargeable power source (such as a rechargeable battery), the input connection can be used to charge and recharge the power source.

The device may include a user interface (UI). In some embodiments, the UI may include an input member to receive operation commands from the user. The input member of the UI may allow the user to control at least one aspect of the operation of the device. In some embodiments, the input member may include a power button to switch the device between an on state and an off state.

In some embodiments, the UI may additionally or alternatively include output components to convey information to the user. In some embodiments, the output member may include a light to indicate to the user the condition of the device (and/or aerosol forming article). The conditions of the device (and/or aerosol forming article) indicated to the user may include conditions that indicate the operation of the heater. For example, the condition 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 buttons, displays, touch screens, switches, lights, and so on. For example, the output member may include one or more (eg, two, three, four, etc.) light emitting diodes ("LEDs") located on the body of the device.

The device may further include a puff sensor (for example, an air flu sensor) forming a part of the input member of the UI. The puff sensor can be configured to detect that the user draws on the end (ie, the terminal (mouth) end) of the smoke forming article. The puff sensor may be, for example, a pressure sensor or a microphone. The puff sensor can be configured to generate a signal indicating the state of puff. The signal may instruct the user to puff (puff the smoke from the aerosol-forming product) so that it is in the form of a binary signal, for example. Alternatively or additionally, the signal may indicate the characteristics of the suction (eg, the flow rate of the suction, the length of the suction, etc.).

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

The controller can be configured to control the operation of the heater (and, for example, the heating element). Therefore, the controller can be configured to control the vaporization of smoke forming part of the aerosol forming article engaged with the device. The controller can be configured to control the voltage applied by the power source to the heater. For example, the controller can 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 can implement more complex heater control protocols.

The device may further include a voltage regulator to adjust the output voltage supplied by the power supply to form a regulated voltage. The adjusted voltage can then be applied to the heater.

In some embodiments, if the device includes a UI, the controller may operate one or more components connected to the UI. The controller can be configured to receive command signals from the input components of the UI. The controller can be configured to control the heater in response to the command signal. For example, the controller can be configured to receive "on" and "off" command signals from the UI, and in response to this, the heater can be controlled to be in the corresponding on or off state.

The controller can be configured to send output signals to UI components. The UI can be configured to respond to such output signals (output signals received from the controller) to convey information to the user via the output component. For example, if the device includes one or more LEDs, the LEDs can be operatively connected to the controller. Therefore, the controller can be configured (for example, in response to the output signal) to control the lighting of the LED. For example, the controller can be configured to control the lighting of the LED according to the state of the heater (for example, on or off).

If the device includes a sensor (such as a puff/air flu sensor), the controller can be operatively connected to the sensor. The controller can be configured to receive signals from the sensors (signals such as indicating the condition of the device and/or the aerosol forming product being joined). The controller can be configured to control one aspect of the heater or output member based on the signal from the sensor.

The device may include a wireless interface configured to communicate wirelessly with external devices (for example, via Bluetooth (such as Bluetooth low energy connection) or WiFi wireless communication). Similarly, the input connection can be configured for wired connection to an external device to provide communication between the device and the external device.

The external device can be a mobile device. For example, the external device may be a smart phone, a tablet computer, a smart watch, or a smart car. You can install applications (such as apps) on external devices (such as mobile devices). Applications can facilitate communication between the device and external devices via wired or wireless connections.

The wireless or wired interface can be configured to transmit signals between the external device and the device's controller. In this regard, the controller can control one aspect of the device in response to a signal received from the external device. Alternatively or additionally, the external device may respond to signals received by the slave device (for example, the controller of the slave device).

In one aspect, a system (for example, a smoking replacement system) is provided, and the system includes the device and an aerosol forming article as described in the second aspect. The aerosol-forming article may include an aerosol-forming substrate at the upstream end of the aerosol-forming article. The product may be in the form of a smoking substitute product, such as heating tobacco (HT) consumables (also known as heating not burning (HNB) consumables).

As used herein, the terms "upstream" and "downstream" are intended to refer to the direction of vapor/mist flow, that is, the downstream end of the product/consumable is the mouth end or outlet where the smoke leaves the consumable for inhalation by the user The flow direction of the situation. The upstream end of the product/consumable is the opposite end of the downstream end.

The aerosol-forming substrate can be heated to release at least one volatile compound that can form aerosol. The aerosol-forming substrate can be located at the upstream end of the article/consumable.

In order to generate smoke, the aerosol-forming substrate includes at least one volatile compound, which is intended to be vaporized/atomized and can provide leisure and/or medical effects to the user when inhaled. Suitable chemical and/or physiologically active volatile compounds include the group consisting of nicotine, cocaine, caffeine, opiates and opioids, norpseudoephedrine and cathinone, and carfalactone , Myristyl ether, β-carboline alkaloid, salvinorin A (salvinorin A), and any combination of the foregoing items, functional equivalents, and/or synthetic substitutes.

The aerosol-forming substrate may include plant material. The plant material may include at least one plant material selected from the list including the following items: Amaranthus dubius , Arctostaphylos uva-ursi ( Bearberry ), Argemone mexicana , Amica , Artemisia vulgaris , Yellow Tees, Galea zacatechichi , Canavalia maritima ( Garcan Bean ) , Cecropia mexicana (Guamura), Cestrum noctumum, Cynoglossum virginianum ( wild comfrey), Cytisus scoparius, Damiana, Entada rheedii, Eschscholzia califomica ( Hualing grass), Fittonia albivenis, Hippobroma longiflora, Humulus japonica ( Japanese hops), Humulus lupulus (hops), Lactuca virosa (poison lettuce), Laggera alata, Leonotis leonurus, Leonurus cardiaca ( motherwort), Leonurus sibiricus (honey grass (Honeyweed)), Lobelia cardinalis, Lobelia inflata ( Indian tobacco), Lobelia siphilitica, Nepeta cataria (False Nepeta), Nicotiana species (tobacco), Nymphaea alba (white lily), Nymphaea caerulea (blue lily), poppy, Passiflora incamata (passionflower) Pedicularis densiflora (Indian warrior) Pedicularis groenlandica (elephant head), Salvia divinorum , Salvia dorrii (tobacco sage), Salvia species (sage), Scutellaria galericulata , Scutellaria lateriflora , Scutellaria nana , Scutellaria species, Sida acuta (wire grass), Sida rhombifolia , Silene capensis , Syzygium aromaticum (Clove), Tagetes lucida (Mexican tarragon), Tarchonanthus camphoratus , Tumera diffusa (Mexican beet), Verbascum (Mulbascum), Zamia latifolia (Maconha Brava), and any of the foregoing items Combinations, functional equivalents, and/or synthetic substitutes.

The plant material may be tobacco. Any type of tobacco can be used. This includes but is not limited to flue-cured tobacco, burley tobacco, Maryland tobacco, dark-cured tobacco, oriental tobacco, dark-cured tobacco, perique tobacco, and yellow flower tobacco. This also includes blends of the aforementioned tobaccos.

Tobacco may include one or more of the following items: leaf tobacco, stem tobacco, tobacco powder, tobacco dust, tobacco derivatives, expanded tobacco, homogenized tobacco, shredded tobacco, extruded tobacco, shredded tobacco, and/or reconstituted Tobacco (such as pulp restructuring or paper restructuring).

The aerosol-forming substrate may include agglomerated pieces of homogeneous (e.g., paper/pulp reconstituted) tobacco or aggregate fragments/strips formed from such sheets.

The aerosol-forming substrate may include one or more additives selected from the group consisting of humectants, flavorings, fillers, aqueous/non-aqueous solvents, and binders.

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

The aerosol-forming substrate can be formed in a substantially cylindrical shape so that the product/consumable is similar to a conventional cigarette. Its diameter may be between 5 and 10 mm, for example between 6 and 9 mm or between 6 and 8 mm, for example about 7 mm. Its axial length can be between 10 and 15 mm, for example between 11 and 14 mm, for example about 12 or 13 mm.

The article/consumable may include at least one filter element. There may be a terminal filter element at the downstream/oral end of the article/consumable.

The filter element or at least one of the filter elements (eg, terminal filter element) may include cellulose acetate or polypropylene fiber bundles. At least one filter element (for example, a terminal filter element) may include activated carbon. At least one filter element (for example a terminal element) may comprise paper. The or each filter element may be at least partially (for example completely) surrounded by a plug sleeve (for example a paper plug sleeve).

The final filter element (located at the downstream end of the product/consumable) can be joined to the upstream element forming the product/consumable by wrapping the tipping layer (such as the tipping paper layer). The tipping paper may have an axial length that is longer than the axial length of the terminal filter element, so that the tipping paper completely encloses the terminal filter element plus a wrapper around any adjacent upstream element.

In some embodiments, the article/consumable may include a smoke cooling element that is adapted to cool the smoke generated by the aerosol-forming substrate (generated by heat exchange) before the smoke is inhaled by the user.

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 comprise a cardboard tube. The spacer elements can be bound by a (paper) wrapping layer.

According to a third aspect of the present invention, there is provided a method of using the system as described in the second aspect. The method includes the steps of: inserting an aerosol-forming product into a device; and using a heater of the device to heat the product.

In some embodiments, the method may include the following steps: inserting the article into the cavity in the body of the device, and penetrating the article with the heating element of the device after the article is inserted.

The present invention includes combinations of the described aspects and preferred features, unless such combinations are clearly inadmissible or explicitly avoided.

The skilled person will understand that the features or parameters described with respect to any of the above aspects can be applied to any other aspects except where mutually exclusive. And, except where 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.

The aspects and embodiments of the present invention will now be discussed with reference to the drawings. Those skilled in the art will understand additional aspects and embodiments. All documents mentioned in this article are incorporated into this article by reference.

FIG. 1 is a schematic diagram that provides a general overview of a smoking replacement system 100. The system 100 includes an alternative smoking device 101 and an aerosol forming article in the form of a consumable 102 including an aerosol 103. The system is configured to vaporize the aerosol forming agent by heating the aerosol forming agent 103 (to form a vapor/mist for inhalation by the user).

In the illustrated system, the heater 104 forms a part of the consumable 102 and is configured to heat the aerosol forming agent 103. In this modification, the heater 104 may be electrically connected to the power source 105 when the consumable 102 is engaged with the device 101, for example. The heat from the heater 104 vaporizes the aerosol forming agent 103 to generate steam. The vapor then condenses to form smoke, which is ultimately inhaled by the user.

The system 100 further includes a power supply 105 forming part of the device 101. In other embodiments, the power supply 105 may be located outside the device 101 (but may be connected to this device). The power source 105 may be electrically connected to the heater 104 so that it can supply power to the heater 104 (ie, for the purpose of heating the aerosol forming agent 103). Therefore, control of the electrical connection of the power supply 105 to the heater 104 provides control of the state of the heater 104. The power source 105 may be a power storage, such as a battery or a rechargeable battery (such as a lithium ion battery).

The system 100 further includes an I/O module including a connector 106 (for example, in the form of a USB port, a micro USB port, a USB-C port, etc.). The connector 106 is configured for connection to an external power source (eg, a main power supply socket). The connector 106 can be used instead of the power supply 105. That is, the connector 106 may be electrically connected to the heater 104 in order to supply electric power to the heater 104. In such embodiments, the device may not include a power source, and the power source of the system may instead include the connector 106 and an external power source (the connector 106 provides electrical connection to this external power source).

In some embodiments, if the power source 105 includes a rechargeable battery, the connector 106 can be used to charge and recharge the power source 105.

The system 100 also includes a user interface (UI) 107. Although not shown, the UI 107 may include an input member to receive commands from the user. The input member of UI 107 allows the user to control at least one aspect of the operation of the system 100. The input member may be in the form of buttons, touch screens, switches, microphones, etc., for example.

The UI 107 also includes output components to convey information to the user. The output member may include, for example, a lamp (such as an LED), a display screen, a speaker, a vibration generator, and so on.

The system 100 further 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 can be separated from the device 101 (but can be connected to this device). The controller 108 is configured to control the operation of the heater 104, and may be configured to control the voltage applied from the power source 105 to the heater 104, for example. The controller 108 can be configured to switch the supply of power to the heater 104 between an on state and an off state. In the on state, the full output voltage of the power supply 105 is applied to the heater 104, and in the off state, the The heater 104 applies voltage.

Although not shown, the system 100 may also include a voltage regulator to regulate the output voltage from the power supply 105 to form a regulated voltage. The adjusted voltage can then be applied to the heater 104.

In addition to being connected to the heater 104, the controller 108 is also operatively connected to the UI 107. Therefore, the controller 108 can receive input signals from the input members of the UI 107. Similarly, the controller 108 can transmit an output signal to the UI 107. In response to this, the output component of the UI 107 can convey information to the user based on the output signal. The controller also includes a memory 109 which is a non-volatile memory. The memory 109 contains instructions which, when implemented, cause the controller to perform certain tasks or steps of the method.

2A and 2B illustrate a heated tobacco (HT) smoking replacement system 200. The system 200 is an example of the system 100 described in relation to FIG. 1. The system 200 includes HT equipment 201 and HT consumables 202. The above description of FIG. 1 is applicable to the system 200 of FIGS. 2A and 2B, and will therefore not be repeated.

The device 201 and the consumable 202 are configured such that the consumable 202 can be coupled with the device 201. FIG. 2A shows the device 201 and the consumable 202 in an engaged state, and FIG. 2B shows the device 201 and the consumable 202 in a disengaged state.

The device 201 includes a main body 209 and a top cover 210. In use, the top cover 210 is joined at the end of the main body 209. Although it cannot be seen from the drawing, the top cover 210 is movable relative to the main body 209. In detail, the top cover 210 is slidable and can slide along the longitudinal axis of the main body 209.

The device 201 includes an output member in the form of a plurality of light emitting diodes (LEDs) 211 (forming a part of the UI of the device 201), and these LEDs 211 are linearly arranged along the longitudinal axis of the device 201 and arranged in the main body of the device 201 209 on the outer surface. The button 212 is also arranged on the outer surface of the main body 209 of the device 201 and is axially spaced apart from the LEDs 211 (ie, spaced along the longitudinal axis).

FIG. 2C shows a detailed cross-sectional view of the consumables of 202 of the system 200. The consumable 202 is roughly similar to a cigarette. In that regard, the consumable 202 has a generally cylindrical form 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 further include a cooling element. The cooling element may exchange heat with the vapor formed by the aerosol-forming substrate 213 to cool the vapor to promote condensation of the vapor.

The aerosol forming substrate 213 is substantially cylindrical and located at the upstream end 217 of the consumable 202 and includes the aerosol forming agent of the system 200. In that 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 the air stream flowing through the aerosol-forming substrate 213. The air flow is generated by the user's suction action on the downstream 218 (ie, terminal or mouth) end of the consumable 202.

In this embodiment, the aerosol-forming substrate 213 includes a tobacco material, and the tobacco material may, for example, include any suitable part of a tobacco plant (such as leaves, stems, roots, bark, seeds, and flowers). Tobacco may include one or more of the following items: leaf tobacco, stem tobacco, tobacco powder, tobacco dust, tobacco derivatives, expanded tobacco, homogenized tobacco, shredded tobacco, extruded tobacco, shredded tobacco, and/or reconstituted Tobacco (such as pulp restructuring or paper restructuring). For example, the aerosol-forming substrate 213 may include agglomerated pieces of homogeneous (eg, paper/pulp reconstituted) tobacco or agglomerated fragments/strips formed from such sheets.

In order to generate smoke, the aerosol-forming substrate 213 includes at least one volatile compound, which is intended to be vaporized/atomized and can provide leisure and/or medical effects to the user when inhaled. The aerosol-forming substrate 213 may further include one or more additives. For example, such additives may be in the form of wetting agents (such as propylene glycol and/or vegetable glycerin), flavors, fillers, aqueous/non-aqueous solvents, and/or binders.

The terminal filter element 214 is also substantially cylindrical, and is located downstream of the aerosol-forming substrate 213 and located at the downstream end 218 of the consumable 202. The terminal filter element 214 is in the form of a hollow cavity filter element and has a cavity 219 formed therethrough (for example for air flow). The diameter of the cavity 219 is 2 mm. The terminal filter element 214 is formed of a porous (for example, monoacetate) filter material. As described above, the downstream end 218 of the consumable 202 (ie, where the terminal filter 214 is located) forms the mouthpiece of the consumable 202, on which the user draws. Air flow is drawn from the upstream end 217, through the components of the consumable 202, and drawn from the downstream end 218. The air flow is driven by the user who draws on the downstream end 218 (ie, the mouth portion of the cigarette holder) of the consumable 202.

The upstream filter element 215 is axially located near the aerosol-forming substrate 213 and between the aerosol-forming substrate 213 and the terminal filter 214. Similar to the final filter 214, the upstream filter element 215 is in the form of a hollow cavity filter element such that it has a cavity 220 extending axially through the hollow cavity filter element. As such, the upstream filter 215 can act as an air flow restrictor. The upstream filter element 215 is formed of a porous (for example, monoacetate) filter material. The cavity 220 of the upstream filter element 215 has a larger diameter (3 mm) than the final filter element 214.

The spacer 216 is in the form of a cardboard tube, and defines a cavity or chamber between the upstream filter element 215 and the terminal filter element 214. The spacer 216 is used to allow the vapor/smoke from the aerosol forming substrate 213 to cool and mix. The spacer has an outer diameter of 7 mm and an axial length of 14 mm.

Although not visible from the drawing, the aerosol-forming substrate 213, the upstream filter 215, and the spacer 216 are surrounded by a paper wrapper. The terminal filter 214 is bound by a tipping layer, which also wraps a part of the paper wrapping layer (in order to connect the terminal filter 214 to the rest of the consumable 202). The upstream filter 215 and the final filter 214 are surrounded by another wrapper in the form of a plug sleeve.

Now returning to the device 201, FIG. 2D shows a detailed view of the end of the device 201, which is configured to be engaged with the consumable 202. The top cover 210 of the device 201 includes an opening 221 (which can be better seen from FIG. 2D) leading to an internal cavity 222 defined by the top cover 210. The opening 221 and the cavity 222 are formed to receive at least a part of the consumable 202. During the joining of the consumable 202 and the device 201, a part of the consumable 202 is received through the opening 221 and received into the cavity 222. After engagement (refer to FIG. 2B ), the downstream end 218 of the consumable 202 protrudes from the opening 221 and therefore also protrudes from the device 201. The opening 221 includes a notch 226 disposed laterally. When the consumable 202 is received in the opening 221, these notches 226 remain open and can be used, for example, to hold the cover in place to cover the end of the device 201.

Figure 2E shows a cross-section through a central longitudinal plane, which passes through the device 201. The device 201 is shown engaged with the consumable 202.

The device 201 includes a heater 204 including a heating element 223. The heater 204 forms a part of the main body 209 of the device 201 and is rigidly mounted to the main body 209. In the illustrated embodiment, the heater 204 is a rod heater with a heating element 223, which has a circular transverse profile. In other embodiments, the heater may be in the form of a blade heater (for example, a heating element with a rectangular transverse profile) or a tube heater (for example, a heating element with a tubular form).

The heating element 223 of the heater 204 protrudes from the inner base of the cavity 222 toward the opening 221 along the longitudinal axis. As is obvious from the drawing, the length of the heating element (ie along the longitudinal axis) is less than the depth of the cavity 222. In this way, the heating element 223 does not protrude from the opening 221 or extend beyond the opening.

When the consumable 202 is received in the cavity 222 (as shown in FIG. 2E ), the heating element 223 penetrates the smoke forming substrate 213 of the consumable 202. In detail, when the heating element 223 is inserted in the aerosol-forming substrate 213, the heating element extends almost the entire axial length of the aerosol-forming substrate. Therefore, when the heater 204 is activated, heat is conducted radially from the outer peripheral surface heating element 223 to the aerosol-forming substrate 213.

The heating element 223 may be formed of ceramic. As shown in FIG. 3, the heating element 223 may include an outer layer 232 (for example, an outer ceramic layer) containing Al ₂ O ₃ . The heating element 223 may include a heating rail 227, which may extend longitudinally along the heating element 223 to form a heating portion of the heater 204. The heating rail 227 may include tungsten and/or rhenium. The heating rail 227 may have a thickness of about 20 μm. As shown in FIG. 3, the heating element 223 may include a rail layer 228 on which the heating rail 227 is formed. The rail layer 228 may be a temperature measuring rail. Further, a set of connection terminals can be provided on the heating element for connection with the circuit of the device 201.

The heater 204 may further include a support 229 at the proximal end 230 of the heating element 223. The support 229 can facilitate the installation of the heating element 223 in the device 201. The support 229 may be formed of any suitable material, such as zirconia.

The heater 204 has a coating formed of silicon oxide. The coating may form at least a part of the outer surface of the heater 204. The silicon oxide coating can provide a non-stick outer surface of the heater 204. The coating can prevent or minimize the deposition of residues on the outer surface. The coating can be formed by a dipping process. For example, the coating can be formed by a low-temperature dipping process. The coating may form a glaze layer on the outer layer 232 of the heater 204. A part of the rod of the heating element 223 may be dipped into silicon oxide to form a coating. The support 229 may be formed on a part of the coating. Alternatively, the support can also be coated.

The coating may cover at least a part of the rod of the heating element 223. The rod may have a tapered distal tip 231 to facilitate penetration of the aerosol forming substrate by the heater 204. The tapered distal tip 231 may be tapered in shape and/or the tapered distal tip may be attached to the heating element 223 together. The tapered distal tip 231 may be formed of any suitable material, such as zirconia. In addition to a portion of the rod, the coating may also cover the tapered distal tip 231 of the rod.

The coating may have a thickness of 5-30 μm. In one embodiment, the thickness of the coating may be 5-15 μm. In one embodiment, the thickness of the coating may be substantially 10 μm. The term "substantially" in this article is used to include a change of 10-25% of the indicated value. In one embodiment, the thickness of the coating may be greater than the maximum surface deviation of the rod. In one embodiment, the thickness of the coating may be greater than the arithmetic average roughness of the rod. In yet another embodiment, the thickness of the coating may be greater than the root mean square roughness of the rod.

The device 201 further includes an electronic device cavity 224. The power source (in the form of a rechargeable battery 205 (lithium ion battery)) is located in the electronic device cavity 224.

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

The device 201 includes a controller (not shown) located in the cavity 224 of the electronic device. The controller includes a microcontroller mounted on a printed circuit board (PCB). The USB port 206 is also connected to the controller 208 (ie to the PCB and microcontroller).

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 can be accomplished by the controller switching the 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 the user pressing the button 212. Depressing the button 212 may cause the controller to allow voltage (from the rechargeable battery 205) to be applied to the heater 204 (in order to heat the heating element 223).

The controller is also configured to control the LED 211 in response to (eg, detected) conditions of the device 201 or the consumable 202. For example, the controller may control the LED to indicate whether the device 201 is in the on state or the off state (for example, when the device is in the on state, one or more of the LEDs may be lit by the controller).

The device 201 includes an additional input member in the form of a puff sensor 225 (ie, an input member other than the button 212). The puff sensor 225 is configured to detect that the user draws (ie inhales) at 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 operatively connected to the controller 208 in the cavity 224 of the electronic device, so that the signal from the puff sensor 225 indicating the state of puff (that is, puffing or not puffing) forms a signal to the controller 208 Input (and can therefore be responded to by the controller 208).

The features disclosed in the foregoing description, or in the scope of the following patent applications, or in the drawings can be used alone or in any combination of such features to implement the present invention in various forms, as appropriate, etc. Features are expressed in their specific forms or in terms of means for performing the disclosed functions, or methods or procedures for obtaining the disclosed results.

Although the present invention has been described in conjunction with the above exemplary embodiments, when this disclosure is given, those skilled in the art will understand many equivalent variations and modifications. Therefore, the exemplary embodiments of the invention set forth above are considered to be illustrative and non-limiting. Various changes to the described embodiments can be made without departing from the spirit and scope of the present invention.

For the avoidance of any doubt, any theoretical explanation provided in this article is provided for the purpose of improving readers' understanding. The inventor does not wish to be bound by any of these theoretical explanations. Any section headings used in this article are for organizational purposes only and are not construed as limiting the subject matter described.

Throughout this specification (including the scope of patent applications below), unless the context requires otherwise, the terms "having", "including", and "including" and their variants will be understood to imply inclusion of the stated integer or Steps, or integers or groups of steps, but do not exclude any other integers or steps, or groups of integers or steps.

It must be noted that, as used in this specification and the scope of the accompanying patent application, the singular forms "a", "an", and "the" include plural referents, unless the context clearly indicates otherwise. Ranges can be expressed herein as from "about" one specific value and/or to "about" another specific value. When expressing such a range, another embodiment includes from one specific value and/or to another specific value. Similarly, when a value is expressed as an approximation by using the antecedent "about", it will be understood that this particular value forms another embodiment. The term "about" with respect to numerical values is optional and means, for example, +/-10%.

The terms "preferably" and "preferably" are used herein to refer to embodiments of the present invention that can provide certain benefits in some cases. However, it should be understood that other embodiments may also be preferable under the same or different conditions. Therefore, the description of one or more preferred embodiments does not imply or imply that other embodiments are useless, and are not intended to exclude other embodiments from the scope of this disclosure or the scope of the patent application.

100: Smoking Alternative System 101: Alternative smoking equipment 102: Consumables 103: Smoke forming agent 104: heater 105: Power 106: Connector 107: User Interface (UI) 108: Controller 109: Memory 200: Smoking Alternative System 201: HT equipment 202: HT consumables 204: heater 205: Rechargeable battery 206: USB port 208: Controller 209: Subject 210: top cover 211: Light-emitting diode (LED) 212: Button 213: Smoke forming substrate 214: terminal filter element 215: Upstream filter element 216: Spacer element 217: Upstream 218: Downstream 219: Hole 220: cavity 221: open 222: cavity 223: heating element 224: Electronic device cavity 225: Puff Sensor 226: Notch 227: heating rail 228: Rail Layer 229: Support 230: near end 231: tapered distal tip 232: Outer Layer

The embodiments that illustrate the principles of the present invention will now be discussed in more detail with reference to the accompanying drawings, so that the present invention can be understood and other aspects and features of the present invention can be understood. In the accompanying drawings:

Figure 1 is a schematic diagram of a smoking replacement system;

Figure 2A is a front view of the first embodiment of the smoking replacement system, in which the consumable is engaged with the device;

Figure 2B is a front view of the first embodiment of the smoking substitution system, where the consumables are detached from the device;

2C is a cross-sectional view of the consumables of the first embodiment of the smoking replacement system;

Figure 2D is a detailed view of the end of the device of the first embodiment of the smoking replacement system;

Figure 2E is a cross-sectional view of the first embodiment of the alternative smoking system;

Fig. 3 is a schematic diagram of a heater according to an embodiment.

Domestic deposit information (please note in the order of deposit institution, date and number) no Foreign hosting information (please note in the order of hosting country, institution, date and number) no

223: heating element

227: heating rail

228: Rail Layer

229: Support

230: near end

231: tapered distal tip

232: Outer Layer

Claims (17)

A heater for a heat-not-burn device, including: A pole with a heating rail on the pole; A coating formed of silicon oxide, the coating forming an outer surface of the heater for heating a part of the tobacco in a consumable for bonding with the device. The heater according to claim 1, wherein the rod includes a ceramic core. The heater according to claim 2, wherein the ceramic core includes Al ₂ O ₃ . The heater according to the aforementioned claim, wherein the heating rail extends along a longitudinal axis of the rod to form a heating part of the heater. The heater according to claim 1, wherein the shaft includes a tapered distal tip. The heater according to claim 5, wherein the tapered distal tip is tapered. The heater of claim 5, wherein the tapered distal tip is attached to the shaft. The heater according to claim 5, wherein the coating covers at least the heating portion and the tapered distal tip. The heater as described in any one of claims 1-3, wherein the heater includes a seat at a proximal end of the stem for attachment to the device. The heater according to claim 9, wherein the support is formed on a part of the coating. The heater as described in any one of claims 1-3, wherein the thickness of the coating is greater than a maximum surface deviation of the rod. The heater as described in any one of claims 1-3, wherein the thickness of the coating is greater than an arithmetic average roughness of the rod. The heater as described in any one of claims 1-3, wherein the thickness of the coating is greater than a root mean square roughness of the rod. The heater according to any one of claims 1-3, wherein the rod includes a rail layer, and the heating rail is formed on the rail layer. The heater according to claim 14, wherein the rail layer includes a temperature measuring rail. The heater according to any one of claims 1 to 3, wherein a thickness of the coating is 5 to 25 microns, preferably 5 to 15 microns, most preferably substantially 10 microns. A heat-not-burn device including a heater as described in any of the previous claims.

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