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WO2025087961A1 - Dispositif de génération d'aérosol à réaction chimique exothermique - Google Patents

Dispositif de génération d'aérosol à réaction chimique exothermique Download PDF

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Publication number
WO2025087961A1
WO2025087961A1 PCT/EP2024/079938 EP2024079938W WO2025087961A1 WO 2025087961 A1 WO2025087961 A1 WO 2025087961A1 EP 2024079938 W EP2024079938 W EP 2024079938W WO 2025087961 A1 WO2025087961 A1 WO 2025087961A1
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WO
WIPO (PCT)
Prior art keywords
aerosol
heating unit
generating device
channels
medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/079938
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English (en)
Inventor
Samrand BEHFAR
Sandro FEUERSTEIN
Benjamin Koch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JT International SA
Original Assignee
JT International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JT International SA filed Critical JT International SA
Publication of WO2025087961A1 publication Critical patent/WO2025087961A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
    • A24F42/10—Devices with chemical heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F42/00—Simulated smoking devices other than electrically operated; Component parts thereof; Manufacture or testing thereof
    • A24F42/60—Constructional details

Definitions

  • the present invention relates to an aerosol-generating device for an aerosol-generating article.
  • the aerosol-generating device comprises a heating unit, a catalytic medium and a fuel medium.
  • the fuel medium is configured to contact the catalytic medium at least partially, and to react with an oxidizing agent by means of an exothermic chemical reaction to generate heat for operating the heating unit.
  • the present invention also relates to a respective aerosol-generating system.
  • Aerosol-generating devices in particular Electronic Nicotine Delivery Systems (known as ENDS) have become popular worldwide over the last decades. These devices are alternatives to traditional combustible tobacco products such as cigarettes.
  • ENDS Electronic Nicotine Delivery Systems
  • HNB heated tobacco products
  • HNB systems can generate an inhalable aerosol from heating a tobacco containing substrate, usually in solid or pulverulent form.
  • Such HNB systems require an electronic device comprising a heating unit to heat up a tobacco containing substrate instead of burning tobacco as performed in conventional cigarettes.
  • the above-mentioned heating units are usually provided with a power source to electrically heat up the tobacco.
  • Inductive and resistive heating units are known in this context.
  • Such heating mechanisms typically require a large battery, which must be regularly charged.
  • maintenance of the electrical parts must be performed to ensure consistent performance.
  • an object of the present invention is to overcome the above- mentioned disadvantages.
  • the heating unit should be provided in such a manner that heating can be improved and simplified and that the overall user experience is enhanced.
  • a 1 st embodiment of the invention is directed to an aerosol-generating device for an aerosol-generating article, the aerosol-generating device comprising: a heating unit having a mouth end for receiving an aerosol-generating article, and a distal end, the heating unit configured to heat an aerosol-forming substrate of an aerosol-generating article when received within the heating unit; a catalytic medium; a fuel medium configured to contact the catalytic medium at least partially, and to react with an oxidizing agent by means of an exothermic chemical reaction to generate heat for operating the heating unit; wherein the catalytic medium is arranged along the heating unit in a section covering at least 5% of the extension of the heating unit from the mouth end to the distal end.
  • the aerosol-generating device has the advantage that provision of heat for heating the aerosol-forming substrate is based on a chemical reaction rather than another source of energy, such as an electrical energy resource.
  • the latter one typically requires large and heavy batteries. These batteries need to be charged regularly, which is an annoying task for the user.
  • the inventors found a way to overcome this issue according to the aerosol-generating device as described in here.
  • the catalytic medium has the advantage of accelerating the chemical reaction. Further, arranging the catalytic medium along the heating unit facilitates that the aerosolforming substrate comprised by the aerosol-generating article is heated more uniformly. This ensures that the aerosol-forming substrate can be consumed more evenly. Without wishing to be bound by theory, it is believed that the aerosols have an improved flavor. Arranging the catalytic medium along the heating unit in a section covering at least 5% of the extension of the heating unit further contributes to the advantage of a more uniform heating and a better taste.
  • heating by means of electricity may not be necessary according to the proposed device.
  • it could be dispensed with any electrical power source used for heating. This may also increase reliability of the aerosol-generating device, as maintenance of the electric components can be reduced. In addition, safety may be increased due to the absence of electrical components used for heating. Nevertheless, a power source may still be used to provide for other functionalities and / or for activation of the chemical reaction.
  • the catalytic medium as referred to in the present disclosure is understood to reduce an activation energy required for triggering the exothermic chemical reaction. This has the advantage that the overall energy consumption can be reduced, and that the exothermic chemical reaction is initiated faster.
  • the catalytic medium may be a substance or material that provides a surface or environment for catalytic reactions to occur. The catalytic medium may increase the rate of the exothermic chemical reaction without being consumed in the process.
  • the fuel medium as referred to in the present disclosure may be a substance in which a fuel is present, and which can undergo combustion or another type of reaction to release energy. It is noted that the fuel medium may, in one example, be part of the aerosol-generating article itself. In another example, the fuel medium may be part of an external container not comprised by the aerosol-generating device. However, it is preferred that the fuel medium is part of the aerosol-generating device. It is noted that combinations thereof are not precluded according to the present disclosure.
  • the heating unit as referred to herein is to be understood as a three-dimensional space that is heated when the heating unit is operating. For instance, one or more walls or surfaces of the heating unit may become hot during the exothermic chemical reaction upon which the article can be heated when inserted. However, also products of the exothermic chemical reaction, in particular gaseous products may facilitate heating of the aerosol-forming substrate of the aerosol-generating article when received. For instance, the gaseous products may come directly into contact with the aerosol-forming substrate of the aerosol-generating article. Exemplarily, by way of the three- dimensional space of the heating unit, an elongate heating element protruding or extending into a space may not be regarded as a heating unit referred to in here. Although a chemical reaction is used for heating, the present disclosure does not preclude that the heating unit comprises a resistive heating element and / or an inductive heating element. For instance, such heating element could be used to provide for additional heating.
  • the distal end of the heating unit may be the end in proximity of which an end of the aerosol-generating article is arranged when the aerosol-generating article is received within the heating unit.
  • the catalytic medium being arranged along the heating unit in a section covering at least 5% of the extension of the heating unit from the mouth end to the distal end may be understood as follows:
  • the heating unit could define a longitudinal axis and the catalytic medium covers a section of the heating unit along said longitudinal axis. This has the advantage that the aerosol-generating article can be received whilst at the same time being heated uniformly.
  • the heating unit may form a different shape from which a longitudinal axis may not be derivable. Nevertheless, having a longitudinal axis may be preferred for many applications.
  • the aerosol-generating device may be a portable and/ or a handheld aerosol-generating device that is comfortable for a user to hold.
  • the catalytic medium is arranged along the heating unit in a section covering at least io%, preferably at least 20%, more preferably at least 40%, more preferably at least 60%, most preferably at least 80% of the extension of the heating unit from the mouth end to the distal end, and/or covering at most 100%, preferably at most 95%, more preferably at most 90%, most preferably at most 80% of the extension of the heating unit from the mouth end to the distal end.
  • the aerosol-forming substrate may thereby be heated more uniformly.
  • an optimal balance can be struck between two conflicting requirements.
  • a more homogeneous and consistent temperature distribution can be provided, which can lead to an improved flavor for the user.
  • a greater section maybe beneficial.
  • only as much catalytic medium as necessary should be provided. For this, a smaller section would be beneficial.
  • the catalytic medium is arranged along the heating unit in a section covering at least 5%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, more preferably at least 90%, and/or covering at most Channels
  • the device is further comprising one or more channels arranged in a periphery of the heating unit and in fluid communication with the heating unit, wherein the catalytic medium is arranged within the one or more channels.
  • the one or more channels may in one example substantially enclose the heating unit at least partially. This further promotes an improved heat distribution to the aerosolforming substrate.
  • the one or more channels may form an open space, which may be filled at least partially with the catalytic medium. Further, as described elsewhere herein, other substances and in particular gases may be guided through the channels.
  • the one or more channels may be in the form of one or more or a combination of a slit, a groove, a cut, a vent, or the like.
  • the one or more channels may form one substantially coherent open space. Further, the one or more channels may form a plurality of sub spaces, which may or may not be interconnected.
  • the one or more channels comprise one annular channel, preferably one elongate annular channel arranged along the extension of the heating unit from the mouth end to the distal end.
  • annular channel as used herein may be a type of channel having ring-like or circular shape. It may comprise two concentric circles or cylindrical shapes, where one may be located inside the other. Thereby, the two concentric circles or cylindrical shapes may create a space between them. This space, often referred to as the annulus or annular region, is where fluids or other substances can flow or be contained. It is noted that although the term annular may mean to be of circular shape, other shapes deviating from a perfect circular shape may be encompassed. In some examples, the shape may be elliptical or may generally be referred to as a rounded shape.
  • the term “elongate” means that there maybe a dimension along one axis of the channel, which may be very much larger than one and preferably than both dimensions along the remaining axes, the remaining axes being substantially perpendicular to said one axis. It is understood that when dimensions are described herein, manufacturing tolerances usually must be taken into consideration. Thus, the dimensions described herein may vary slightly.
  • the one or more channels have a thickness of at least 0.2 mm, preferably at least 0.5 mm, more preferably at least 1.0 mm, more preferably at least 2.0 mm, more preferably at least 3.0 mm, more preferably at least 4.0 mm, most preferably at least 5.0 mm, and/or of at most 10 mm, preferably at most 8 mm, more preferably at most 7 mm, even more preferably at most 6 mm, most preferably at most 5 mm.
  • the thickness of the one or more channels may describe the space formed by the channels when projected into one direction. As understood the thickness may be in a direction perpendicular to a receiving direction of the aerosol-generating article in the heating unit. As an illustrative example, when the one or more channels form an annular shape, the thickness may be measured in the radial direction. It is noted that the thickness described in here may vary depending on the number of channels, the materials that are employed, the catalytic medium and a thickness of the walls defining the channel.
  • the one or more channels are configured such that a thickness of the one or more channels varies by 2% to 20%, preferably by 5% to 10%, more preferably by 6% to 9% compared to a thickness at ambient temperature when the one or more channels undergo a temperature differential of about 50°C to ioo°C, wherein the one or more channels preferably comprise a bimetal.
  • the device could be termed a fail-safe device, as increasing the temperature further may diminish and/or stop the chemical reaction in one example.
  • a bimetal may be a bimetallic strip or bimetallic element, which may be a mechanical element or component made by bonding together two different metals with different coefficients of thermal expansion.
  • a greater thermal expansion means that the expansion, at a (certain) temperature and/or a (certain) temperature region, is greater.
  • This combination of two metals allows the bimetal to respond to changes in temperature by bending or curving. This makes it particularly advantageous when used in temperature-sensitive switches, control systems, and devices, such as the aerosolgenerating device described in here.
  • the thickness described in here may vary depending on the number of channels, the materials that are employed, the catalytic medium and a thickness of the walls defining the channel.
  • the heating unit is shaped cylindrically, and the one or more channels are arranged substantially symmetrically with respect to a longitudinal axis of the heating unit, wherein the one or more channels are preferably fully enclosing the heating unit.
  • This further contributes to an improved and more uniform heat transfer to the aerosolforming substrate of the aerosol-generating article, when received. This saves unnecessary usage of energy sources, such as the use of the fuel medium. This also contributes to an improved experience for the user.
  • the longitudinal axis of the heating unit may be substantially parallel and along the receiving direction of the aerosol-generating article.
  • the cylindrical shape is a three-dimensional geometric shape that may closely resemble a tube or a can. It may have a curved and/or elongated shape. It may have two parallel substantially circular bases, which may have substantially the same size and shape. However, as understood, at least one of the bases is opened at the mouth end of the heating unit for receiving the aerosol-generating article. It is noted that the shape of the heating unit may deviate from an exact shape of a cylinder due to manufacturing tolerances or the like.
  • the catalytic medium is provided as a coating on an outer surface of the heating unit facing the one or more channels.
  • the coating of the catalytic medium on the outer surface of the heating unit has the following benefits including but not limited to protection, stability, or functional enhancement.
  • the coating may change a roughness of the surface, which could increase its surface area, thereby providing an increase contact area between the fuel medium and the catalytic medium. This improves the chemical reaction.
  • the thickness of the coating may be varied to provide for further benefits depending on the desired outcome.
  • the coating may also have the advantage to provide a physical barrier, which can prevent the migration of gases, liquids, or other substances.
  • a coating may be understood as a thin layer or film of a material applied to the surface of an object or substrate.
  • the outer surface of the heating unit may form an inner surface of the one or more channels.
  • the one or more channels are in direct proximity to the heating unit. This improves the heat transfer.
  • the one or more channels have at least one air intake configured to guide air into the one or more channels when a user sucks on the aerosol-generating article when received in the heating unit.
  • the air intake being configured to guide air when a user draws on the aerosolgenerating article has the advantage that the user can conveniently dictate the extent of the chemical reaction on its own volition.
  • the one or more channels have at least one fuel medium intake configured to guide the fuel medium into the one or more channels when a user sucks on the aerosol-generating article when received in the heating unit.
  • the fuel medium intake being configured to guide air when a user sucks on the aerosolgenerating article has the advantage that the user can conveniently dictate the extent of the chemical reaction on its own volition.
  • the at least one fuel medium intake comprises a membrane configured to substantially prevent the fuel medium from being guided into the one or more channels when a user does not suck on the aerosol-generating article when received in the heating unit.
  • the aerosol-generating device can be a fail-safe aerosolgenerating device. That is, because as long as the user performs no action, the chemical reaction may be stopped or at least mitigated to a great extent. This may play an important role when a user drops the aerosol-generating device or leaves the device unoccupied. Thereby, it can be ensured that the device it is not damaged by being in operation unintentionally.
  • the membrane may be implemented by means of a valve or the like. Any kind of suitable material may be used for the membrane, including but not limited to rubber, silicone, PVC, Teflon (PTFE), and various elastomers. The choice of material may differ depending on the needs and/or the desired outcome.
  • the membrane can take various forms, such as gaskets, o-rings, seals, barriers, depending on the shape and size of the fuel medium intake.
  • the one or more channels are configured to provide a fluid communication from a mouth end of the aerosol-generating device to the distal end of the heating unit along the periphery of the heating unit and then into the heating unit and to the mouth end of the heating unit.
  • the fluid communication as described in this embodiment has the advantage that products of the exothermic chemical reaction, in particular gaseous products can aid the heating of the aerosol-forming substrate of the aerosol-generating article when received.
  • the gaseous products may come directly into contact with the aerosol-forming substrate of the aerosol-generating article when received.
  • the fluid communication as described herein refers to the exchange or flow of fluids between different components or systems. Thereby, it is understood that a fluid flow path from the mouth end of the aerosol-generating device via the interior of the aerosol-generating device to the mouth end of the heating unit pertains.
  • the exothermic chemical reaction is triggered by means of thermal energy, such as thermal energy emitted from a user touching the aerosol-generating device, a piezo element, and/or a power supply.
  • thermal energy such as thermal energy emitted from a user touching the aerosol-generating device, a piezo element, and/or a power supply.
  • a piezo element also known as a piezoelectric element or piezoelectric transducer, is a device that utilizes the piezoelectric effect to convert mechanical vibrations into electrical energy and vice versa.
  • the fuel medium is a fuel that undergoes oxidation in presence of the oxidizing agent, such as oxygen, preferably a fuel that undergoes combustion, and wherein the fuel medium optionally comprises or preferably consists of one or more of hydrogen, propane, ethanol.
  • the oxidizing agent such as oxygen
  • the fuel medium optionally comprises or preferably consists of one or more of hydrogen, propane, ethanol.
  • the oxidizing agent also known as an oxidant, is a substance that can accept electrons from another substance during a chemical reaction. During such chemical reaction, it causes the other substance to undergo oxidation. Such oxidation involves the loss of electrons. Thereby, the oxidation state of the other substance is increased. This is often associated with reactions where a substance combines with oxygen or loses hydrogen. Thereby, oxidants are understood as the chemical species responsible for causing oxidation reactions.
  • Combustion is an exothermic (heat-releasing) chemical reaction between a fuel and an oxidizing agent, such as oxygen taken from the air. This reaction may result in a rapid and/ or self-sustaining release of energy in the form of heat and light, along with the production of new chemical compounds, termed products. New chemical compounds maybe for instance water vapor (H2O) and carbon dioxide (CO2).
  • the combustion of hydrogen involves the reaction of hydrogen (H2) with oxygen (O2) to produce water vapor (H2O) as the primary product, along with the release of a significant amount of energy in the form of heat.
  • the chemical equation for the combustion of hydrogen is as follows:
  • hydrogen combustion may have various advantages compared to traditional hydrocarbon fuels like gasoline or natural gas.
  • One of the benefits maybe that the primary product of hydrogen combustion is water, which is environmentally friendly. Hydrogen combustion does not produce carbon dioxide (CO2) or other harmful emissions when burned in a clean and efficient manner. Thereby, hydrogen is a promising option for substantially clean energy and reducing greenhouse gas emissions.
  • renewable energy sources such as electrolysis using electricity from renewable sources
  • this further contributes to mitigating greenhouse gas emissions.
  • the fuel medium is hydrogen stored in a metal hydride storage container, wherein the storage container is configured to absorb heat from the environment when the fuel medium is released from the storage container.
  • a metal hydride storage maybe understood as follows. Hydrogen may undergo a chemical reaction with the metal arranged in the container. The hydrogen is thereby chemically bonded, or absorbed by the metal, without the need for compression. Instead, the solid metal hydride may function like a sponge that absorbs and releases the fuel medium. Recovering the fuel medium from the metal hydride storage may be done by adding heat to the storage. This has the benefit of cooling the overall aerosol-generating device, since the necessary heat for recovering the fuel medium is taken from the environment. Thereby, a user can grab the aerosol-generating device in a comfortable manner without burning his or her fingers.
  • the catalytic medium comprises or preferably consists of one or more of platin, palladium.
  • the heating unit when the heating unit is operated by means of the exothermic chemical reaction, the heating unit has an average temperature of at least 50°C, preferably at least 70°C, more preferably at least ioo°C, more preferably at least 15O°C, more preferably at least 200°C, most preferably at least 25O°C, and/or of at most 500 C, preferably at most 400°C, more preferably at most 35O°C.
  • the device of any one of the preceding embodiments is further comprising a Peltier element for absorbing heat generated from the exothermic chemical reaction and for converting the absorbed heat into electrical power.
  • a Peltier element may refer to a cooler, heater, or thermoelectric heat pump. It may be a solid-state active heat pump transferring heat from one side of the element to the other side of the element, with consumption of electrical energy, depending on the direction of the current. A Peltier element can be used for both cooling and heating applications. This may depend on the direction of the electric current.
  • excess heat energy may be transferred into electrical energy and stored in an internal storage unit.
  • the device of any one of the preceding embodiments is further comprising a power supply configured to control the exothermic chemical reaction at least partially and/or to provide current to the heating unit for generating additional heat.
  • the power supply only needs to have such a capacity that it is capable of triggering the exothermic chemical reaction. It may not be necessary to provide for a power supply that is used for the main heating, although this is not precluded.
  • a 20 th embodiment of the invention is directed to an aerosol-generating system comprising the aerosol-generating device as described herein and an aerosolgenerating article comprising an aerosol-forming substrate.
  • the aerosol-generating system as described herein may include all aspects and/ or embodiments described herein, even if not expressly described as belonging to the aerosol-generating system but rather with reference to the aerosolgenerating device. It is also to be understood that the features and advantages described with reference to the aerosol-generating system may equally be applicable to the aerosol-generating device. Brief description of the figures
  • Fig. i illustrates a schematic representation of an aerosol-generating device according to an embodiment of the invention
  • Fig. 2 illustrates a detailed view of Fig. 1;
  • Fig. 3 illustrates a schematic chemical reaction in the presence of a catalytic medium
  • the term “substantial” or “substantially” as used in the present context may be understood to a great or significant extent or for the most part or essentially. In particular, manufacturing tolerances are included by this term.
  • aerosol-generating article may also be referred to as a consumable or consumable article.
  • Such an aerosol-generating article may comprise an aerosol-forming substrate, which can be heated to generate an aerosol and/or an inhalable vapor for the user.
  • the term of the relative position in space maybe intended to include different orientations of the unit, device, part, component and/ or feature other than those shown in the figures.
  • the unit, device, part, component and/or feature in the figure is turned over, the unit, device, part, component and/ or feature described as being “below” or “under” other units, devices, parts, components and/ or features will be “above” the other unit, device, part, component and/or feature. Therefore, the exemplary term “below” can encompass both the above and below orientations.
  • Fig. i and Fig. 2 show an aerosol-generating device i for an aerosol-generating article 2.
  • the aerosol-generating device 1 comprises a heating unit to having a mouth end 12 for receiving the aerosol-generating article 2, and a distal end 13, which is opposite the mouth end 12.
  • the heating unit 10 is configured to heat an aerosol-forming substrate 3 of the aerosol-generating article 2 when received within the heating unit 10.
  • the device 1 also comprises a catalytic medium 15 and a fuel medium 16 configured to contact the catalytic medium 15 at least partially, and to react with an oxidizing agent 17 (as seen in Fig. 3) by means of an exothermic chemical reaction to generate heat for operating the heating unit 10.
  • the catalytic medium 15 is arranged along the heating unit 10 in a section covering at least 5% of the extension of the heating unit 10 from the mouth end 12 to the distal end 13.
  • the fuel medium 16 undergoes combustion in presence of the oxidizing agent 17, such as oxygen.
  • the fuel medium 16 can be hydrogen, propane, ethanol, or the like.
  • the catalytic medium 15 can be platin, palladium, or the like. As shown in Fig. 1, the catalytic medium 15 can be arranged in such a manner along the heating unit 10 that it covers a section of at least 10%, preferably at least 20%, more preferably at least 40%, more preferably at least 60%, most preferably at least 80%, and/or at most 100%, preferably at most 95%, more preferably at most 90%, most preferably at most 80% of the extension of the heating unit 10 from the mouth end 12 to the distal end 13.
  • the device 1 also comprises one or more channels 20 arranged in a periphery of the heating unit 10 and in fluid communication with the heating unit 10.
  • the catalytic medium 15 is arranged within the one or more channels 20.
  • one annular channel 20 is shown.
  • the annular channel 20 has an elongate shape arranged along the extension of the heating unit 10 from the mouth end 12 to the distal end 13.
  • the catalytic medium 15 can be provided as a coating on an outer surface 11 of the heating unit 10 facing the one or more channels 20.
  • the outer surface 11 of the heating unit 10 forms an inner surface 21 of the one or more channels 20.
  • the heating unit 10 is shaped cylindrically, and the channel 20 is arranged substantially symmetrically with respect to a longitudinal axis L of the heating unit 10.
  • the channel 20 can fully encloses the heating unit 10.
  • the channel 20 has at least one air intake 22 configured to guide air into the channel 20 when a user sucks on the aerosol-generating article 2 when received in the heating unit 10.
  • the channel 20 also has at least one fuel medium intake 23 configured to guide the fuel medium 16 into the channel 20 when a user sucks on the aerosol-generating article 2 when received in the heating unit 10.
  • the fuel medium intake 23 can comprise a membrane configured to substantially prevent the fuel medium 16 from being guided into the channel 20 when a user does not suck on the aerosol-generating article 2 when received in the heating unit 10.
  • the channel 20 is configured to provide a fluid communication from a mouth end of the aerosol-generating device 1 to the distal end 13 of the heating unit io along the periphery of the heating unit io and then into the heating unit io and then to the mouth end 12 of the heating unit io.
  • the exothermic chemical reaction can be triggered by means of thermal energy, such as thermal energy emitted from a user touching the aerosol-generating device 1, a piezo element, and/or a power supply.
  • the heating unit io has an average temperature of at least 50°C, preferably at least 70°C, more preferably at least ioo°C, more preferably at least 15O°C, more preferably at least 200°C, most preferably at least 25O°C, and/or of at most 500°C, preferably at most 400°C, more preferably at most 35O°C.
  • the aerosol-forming substrate 3 can be heated.
  • the user inhales an aerosol formed by the aerosol-forming substrate 3.
  • the heating unit 10 when the heating unit 10 is operating, the same applies to the aerosol-generating device 1. Further, when the oxidizing agent 17 contacts the catalytic medium 15 and reacts with the fuel medium 16, it does not mean that the heating unit 10 is immediately set into the operating mode; however, it may be considered as the onset thereof. Moreover, when the oxidizing agent 17 does not react with the fuel medium 16 anymore (e.g., the channels 20 are narrowed, the air intake 22 is substantially closed, and/or the fuel medium intake 23 is substantially closed), it does not necessarily mean that the heating unit 10 is not in the operating mode anymore. However, it maybe the case that the heating unit 10 is in a certain period of time after the stop of the reaction not in the operating mode anymore.
  • the one or more channels 20 described in here may act as a vent.
  • a vent is understood as an opening or passage in a material, such as a material of the aerosol-generating device 1.
  • the vent may be integrally formed with the aerosol-generating device 1.
  • the vent may be implemented by various different shapes and / or size sizes, including one or more of straight segments, curved segments, corner segments, regular segments, or irregular segments.
  • the segments can be arbitrarily arranged along the longitudinal direction of the heating unit 10 or in an alternating manner along the longitudinal direction of the heating unit 10.
  • the fuel medium 16 can be stored in a storage container 30 of the device 1. Further, the fuel medium 16 can be hydrogen (H2) and stored in a metal hydride storage container 30. This storage container 30 can be configured to absorb heat from the environment when the fuel medium 16 is released from the storage container 30.
  • the device 1 can comprise a power supply configured to control the exothermic chemical reaction at least partially and/or to provide current to the heating unit 10 for generating additional heat. Further, the device can comprise a Peltier element for absorbing heat generated from the exothermic chemical reaction and for converting the absorbed heat into electrical power.
  • Fig. 1 also shows an aerosol-generating system 100 comprising the aerosol-generating device 1 and the aerosol-generating article 2.
  • the heating unit 10 comprises a resistive heating element and / or an inductive heating element.
  • the heating unit 10 may comprise a resistive heating element arranged in contact with one or more walls thereof to transfer heat thereto by conduction. Resistance heating may also be referred to as joule heating, resistive heating, or Ohmic heating. It means that during operation, when an electrical circuit is established, electrical current passes through a heating element, for example a ceramic heating element. Typically, two electrodes provide for an electrical contact to the heating element.
  • the heating unit 10 may comprise at least one inductor coil as an example of an inductive heating element.
  • the inductor coil may be arranged circumferentially about the heating unit 10 and configured to inductively heat a susceptor element. It may be possible that the susceptor element is arranged in an aerosol-generating article 2 inserted in the heating unit 10 or that the susceptor element is part of the heating unit 10.
  • Fig. 2 shows the thickness t of the one or more channels 20 in greater detail. For brevity, some elements have been left out in Fig. 2. In addition, merely a part of the channel 20 is shown on one side of the heating unit 10 for brevity only. The dimensions depicted in Fig. 2 may be exaggerated for illustrative purpose only. Further, Fig. 2 merely shows excerpts of the channel 20. As understood, the channel 20 maybe connected, such as along the longitudinal axis L. As indicated in the lower right corner of Fig. 2, an outer boundary of the channel 20 is cut so as to indicated that the outer boundary actually extends further as shown in Fig. 1.
  • the one or more channels 20 can be configured such that a thickness t thereof varies by at least 5% to 10% compared to a thickness t at ambient temperature when the one or more channels undergo a temperature differential of about 50°C to ioo°C.
  • a bimetal may be employed for this.
  • Fig. 2 shows two thicknesses (t_i and t_2) in comparison to illustrate the expansion schematically. It is noted that additionally or alternatively the air intake 22 and/ or the fuel intake 23 may be provided with a bimetal.
  • the catalytic medium 15 may not necessarily be arranged along the heating unit 10 in a continuous section covering a certain percentage of the extension of the heating unit 10 from the mouth end 12 to the distal end 13. Rather, the catalytic medium 15 maybe formed by a plurality of individual portions.
  • Fig. 3 illustrates schematically a chemical reaction in the presence of a catalytic medium 15.
  • the fuel medium 16 and the oxidizing agent 17 may contact the surface of the catalytic medium 15. This can trigger the reaction yielding to the reaction products 18.
  • the arrow depicted in the lower portion of Fig. 3 indicates that heat is generated by way of this exothermic chemical reaction. It is appreciated that by virtue of this reaction, substantially all of the fuel medium 16 reacts. This can ensure that the flavor and taste of aerosols formed by the aerosol-forming substrate 3 is not adversely affected.
  • the aerosol-generating device 1 is portable or can be handheld. The same applies to the aerosol-generating system too and the aerosol-generating article 2.
  • energy may also be provided by means of a chemical reaction and transferred in the form of electrical energy to a heating unit driven by a resistive heater.
  • a chemical reaction may not to be confused with the exothermic chemical reaction referred to in the present disclosure.
  • such a reaction would not occur directly at the heating unit.
  • the heating unit of the present disclosure is configured such that the exothermic chemical reaction by a fuel medium occurs substantially in proximity, e.g., directly at the heating unit. This may have advantages as the aerosol-forming substrate received in the heating unit is heated to a greater extent.
  • a hybrid heating unit may be provided, which could be operated by the fuel medium and by an electrical heater, such as a resistive heater.
  • a fuel cell wherein the fuel medium may be used to charge an internally installed battery.
  • the fuel medium such as hydrogen would be required.
  • no manual electrical charging of the aerosol-generating device would be required, although this is not precluded.
  • this has the advantage that the user is free to decide which heating source is to be used. That is, whether the system and/ or the battery can be operated by a fuel medium, such as hydrogen, methanol, propane, with the aid of a fuel cell or the like, as well as whether the system could be operated by conventional electrical charging.

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Abstract

La présente invention concerne un dispositif de génération d'aérosol (1) pour un article de génération d'aérosol (2), le dispositif de génération d'aérosol (1) comprenant : une unité de chauffage (10) ayant une extrémité buccale (12) destinée à recevoir un article de génération d'aérosol (2), et une extrémité distale (13), l'unité de chauffage (10) étant conçue pour chauffer un substrat de formation d'aérosol (3) d'un article de génération d'aérosol (2) lorsqu'il est reçu à l'intérieur de l'unité de chauffage (10) ; un milieu catalytique (15) ; un milieu combustible (16) conçu pour entrer en contact avec le milieu catalytique (15) au moins partiellement, et pour réagir avec un agent oxydant (17) au moyen d'une réaction chimique exothermique pour générer de la chaleur pour faire fonctionner l'unité de chauffage (10) ; le milieu catalytique (15) étant disposé le long de l'unité de chauffage (10) dans une section recouvrant au moins 5% de l'étendue de l'unité de chauffage (10) de l'extrémité buccale (12) à l'extrémité distale (13).
PCT/EP2024/079938 2023-10-26 2024-10-23 Dispositif de génération d'aérosol à réaction chimique exothermique Pending WO2025087961A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23206177.0 2023-10-26
EP23206177 2023-10-26

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WO2025087961A1 true WO2025087961A1 (fr) 2025-05-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1441607B1 (fr) 2001-10-24 2006-11-29 British American Tobacco (Investments) Limited Article fumant simule et element combustible associe
US20130220316A1 (en) 2010-04-06 2013-08-29 Oglesby & Butler Research & Development Limited Portable handheld vaporising device
EP3542591B1 (fr) 2016-11-18 2020-12-30 Philip Morris Products S.a.s. Ensemble de chauffage, dispositif de génération d'aérosol et procédé permettant de chauffer un substrat formant un aérosol
US20210244082A9 (en) 2005-07-19 2021-08-12 Jt International S.A. Cartridge Used in a Smoking Device for Vaporization

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1441607B1 (fr) 2001-10-24 2006-11-29 British American Tobacco (Investments) Limited Article fumant simule et element combustible associe
US20210244082A9 (en) 2005-07-19 2021-08-12 Jt International S.A. Cartridge Used in a Smoking Device for Vaporization
US20130220316A1 (en) 2010-04-06 2013-08-29 Oglesby & Butler Research & Development Limited Portable handheld vaporising device
EP3542591B1 (fr) 2016-11-18 2020-12-30 Philip Morris Products S.a.s. Ensemble de chauffage, dispositif de génération d'aérosol et procédé permettant de chauffer un substrat formant un aérosol

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