Aerosol-generating system comprising a cartridge containing a gel

Abstract

The present disclosure relates to aerosol-generating systems comprising a cartridge containing a gel. The present disclosure also provides a cartridge for use in an aerosol-generating system, the cartridge comprising: a first chamber having a first chamber housing; and a second chamber separate from the first chamber and having a second chamber housing, wherein the first chamber contains an aerosol-forming substrate in the form of a gel, and wherein the second chamber contains a source of a compound for inhalation, wherein the first chamber housing and the second chamber housing are separate or separable from one another. Providing a dual chamber cartridge assembly with separable chambers has advantages in the range of aerosol that can be delivered for inhalation by a user.

Description

[0001] This application is a divisional application of Chinese patent application No. PCT / EP2017 / 067449, Chinese application No. 201780042394.9, filed on July 11, 2017, entitled "Aerosol generation system including a tube containing gel". Technical Field

[0002] This invention relates to an aerosol generation system in which an aerosol-forming matrix is ​​heated to generate an aerosol. Specifically, this invention relates to an aerosol generation system that heats a gel to form an aerosol. Background Technology

[0003] Aerosol generation systems, such as electronic cigarettes, operate by heating a liquid formulation to create an aerosol for inhalation by a user. They typically consist of a device section and a cartridge. In some systems, the device section contains the power supply and control electronics, while the cartridge contains a liquid reservoir holding the liquid formulation, a heater for vaporizing the liquid formulation, and a wick for conveying the liquid from the reservoir to the heater. Despite the popularity of this type of system, it does have drawbacks. One drawback is the potential for liquid leakage from the reservoir during delivery and storage, as well as when the cartridge is connected to the device section. Using a wick to convey the liquid from the reservoir to the heater can increase the system's complexity. Summary of the Invention

[0004] In a first aspect of the present invention, an aerosol generating cylinder for an aerosol generating system is provided, the aerosol generating cylinder comprising:

[0005] A first chamber and a second chamber separate from the first chamber, wherein the first chamber contains an aerosol-forming matrix in the form of a gel, and wherein the second chamber contains a source of compounds for inhalation.

[0006] The source of the compound for inhalation may include one or both of a nicotine source and a flavoring source.

[0007] Advantageously, the gel is solid at room temperature. In this context, "solid" means that the gel has a stable size and shape and does not flow. The first and second chambers may contain different compositions. Both the first and second chambers may contain gels. The second chamber may contain solid materials. Advantageously, neither the first nor the second chamber contains materials that are not solid at room temperature.

[0008] In this context, an aerosol forming matrix is ​​a material or mixture of materials capable of releasing volatile compounds that can form aerosols. Providing the aerosol forming matrix in gel form can be advantageous for storage and transport or during use. By providing the aerosol forming matrix in gel form, the risk of leakage from the device can be reduced. For example, by reducing the risk of leakage or spillage, the replenishment of the aerosol forming matrix to the device when it is depleted or exhausted can also be improved.

[0009] The aerosol forming matrix may include an aerosol forming agent. As used herein, the term "aerosol forming agent" refers to any suitable known compound or mixture of compounds that, when used, contributes to the formation of a dense and stable aerosol. Aerosol forming agents are substantially heat-resistant and degrade-resistant at the operating temperature of the cylinder. Suitable aerosol forming agents are known in the art and include, but are not limited to: polyols, such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as mono-, di-, or triacetic acid esters of glycerol; and aliphatic esters of mono-, di-, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate. Preferred aerosol forming agents are polyols or mixtures thereof, such as triethylene glycol, 1,3-butanediol, and most preferably glycerol or polyethylene glycol.

[0010] Gel formulations or compositions suitable for releasing aerosol-forming agents at specific temperatures may not be ideally suited for retaining and subsequently releasing other compounds. Retention and release of both can be achieved by providing separate chambers, one containing the aerosol-forming agent and one or more other chambers containing other compounds, such as nicotine or flavor-derived compounds.

[0011] In addition to the gel, the first chamber may also contain additional materials or ingredients.

[0012] As used herein, the term "aerosol generating cylinder" refers to an article comprising an aerosol-forming matrix intended to be heated rather than burned in order to release volatile compounds that can form aerosols. When the resulting aerosol contains nicotine, it is advantageous for the gel to contain a nicotine source. The nicotine source may be contained in one or both of the first and second chambers. Nicotine may be contained in a gel having an aerosol-forming agent in the first chamber, or in a second gel in the second chamber, or in a gel in both chambers. Thus, by maintaining the nicotine in the gel at room temperature, the risk of leakage of nicotine-containing material from the system is reduced. In an alternative arrangement, the nicotine source may be contained in the second chamber, for example, in a liquid or solid material.

[0013] Flavor compounds may be contained in a second chamber within the gel. Alternatively or additionally, flavor compounds may be provided in another form. For example, the second chamber may contain solid tobacco material that releases flavor compounds upon heating. The second chamber may contain one or more of the following: powder, granules, pellets, fragments, strips, bands, or sheets containing one or more of the following: herbaceous leaves, tobacco leaves, tobacco vein fragments, reconstituted tobacco, homogenized tobacco, extruded tobacco, and expanded tobacco. The solid tobacco material in the second chamber may be in a loose form. Tobacco may be contained in a gel or liquid. The second chamber may contain additional tobacco or non-tobacco volatile flavor compounds to be released upon heating.

[0014] The first or second chamber may contain a cap containing, for example, a volatile aroma compound, and such cap may release its contents, for example, by melting during heating.

[0015] Advantageously, the gel includes a thermally reversible gel. This means that the gel becomes fluid when heated to its melting temperature and solidifies again into a gel at its gelation temperature. Preferably, the gelation temperature is at or above room temperature and atmospheric pressure. In this context, room temperature means 25 degrees Celsius. Atmospheric pressure means 1 atmosphere. Preferably, the melting temperature is higher than the gelation temperature. Preferably, the melting temperature of the gel is above 50, 60, or 70 degrees Celsius, and more preferably above 80 degrees Celsius. In this context, melting temperature means the temperature at which the gel is no longer solid and begins to flow. Preferably, the gel comprises agar or agarose or sodium alginate. The gel may include gellan gum. The gel may include a mixture of materials. The gel may include water.

[0016] The gel can be supplied as a single block or as multiple gel elements, such as beads or caps. The use of beads or caps allows the end user to easily refill the first (or second) chamber. The use of caps or beads also allows the user to detect that the cartridge has been used, as the gel will not form the same caps or beads once it has gelled after heating and subsequent cooling.

[0017] When agar is used as a gelling agent, the gel preferably comprises between 0.5 and 5% by weight (and more preferably between 0.8 and 1% by weight) of agar. The gel may also comprise between 0.1 and 2% by weight of nicotine. The gel may also comprise between 30 and 90% by weight (and more preferably between 70 and 90% by weight) of glycerol. The remainder of the gel may comprise water and any flavorings.

[0018] When gellan gum is used as a gelling agent, the gel preferably comprises between 0.5 and 5% by weight of gellan gum. The gel may also comprise between 0.1 and 2% by weight of nicotine. The gel may also comprise between 30 and 99.4% by weight of glycerol. The remainder of the gel may include water and any flavorings.

[0019] In one embodiment, the gel comprises 2% by weight nicotine, 70% by weight glycerol, 27% by weight water, and 1% by weight agar. In another embodiment, the gel comprises 65% by weight glycerol, 20% by weight water, 14.3% by weight tobacco, and 0.7% by weight agar.

[0020] Advantageously, the cartridge does not include a delivery element or mechanism for conveying the aerosol forming agent to a heat source or heater. The contents of the first or second chamber are advantageously heated in situ to generate the desired aerosol. In this context, "in situ" means in the same location as the contents were in the first and second chambers prior to use. No capillary wick or pump is required. Advantageously, neither the first nor second chamber includes non-volatile structures for holding / retaining the liquid or gel adjacent to the heater.

[0021] The first and second chambers may be positioned side by side or one chamber may be positioned within the other chamber, or they may be arranged in series such that airflow can pass through the first chamber or flow through one chamber and then through or flow through the other chamber.

[0022] The cylinder may include a slot between a first chamber and a second chamber. The slot may be configured to house a heating element. The heating element may be housed in the slot, for example, when the cylinder is mounted in an aerosol forming apparatus. Providing a slot in which the heating element is housed can provide efficient heating by facilitating the direct transfer of heat energy from the heating element to the first and second chambers, rather than, for example, heating other components of the system or ambient air. Advantageously, the slot is a closed slot. "Closed" in this context means closed at one end. Providing a closed slot allows the heating element to be protected from vapors or aerosols generated by the system and helps prevent condensate buildup on the heater.

[0023] The cylinder may be referred to as a cylinder assembly and may include chambers that can be individually inserted into or connected to and removed from other elements of the aerosol generation system. The cylinder assembly may include components other than the first and second chambers. The cylinder may include a housing. The housing of the cylinder may be formed of one or more materials. Suitable materials include, but are not limited to: metals, aluminum, polymers, polyetheretherketone (PEEK), polyimide (e.g., Kapton®), polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polystyrene (PS), fluorinated ethylene propylene (FEP), polytetrafluoroethylene (PTFE), epoxy resins, polyurethane resins, and vinyl resins.

[0024] The shell of the cylinder may be formed of one or more thermally conductive materials. The interior of the first or second chamber may be coated or treated to include one or more thermally conductive materials. Using one or more thermally conductive materials to form the cylinder or to coat the interior of the first and second chambers can advantageously increase heat transfer from the heater to the contents of the chamber, such as a gel. Suitable thermally conductive materials include, but are not limited to, metals such as aluminum, chromium, copper, gold, iron, nickel, and silver, alloys of brass and steel, and ceramics, or combinations thereof. Advantageously, at least one wall of the shell has a thermal conductivity greater than 10 watts per meter per Kelvin at room temperature. In a preferred embodiment, the shell includes at least one wall formed of aluminum.

[0025] In embodiments where the cylinder is configured to be heated inductively, the cylinder housing may include a receptor, such as a receptor layer. The receptor layer may, for example, form the wall of the housing, or may be a coating applied to the interior or exterior of the housing. The receptor may be located within a first chamber or a second chamber. For example, the gel may include a receptor material.

[0026] The cylinder used in the aerosol generation system according to the invention can be formed by any suitable method. Suitable methods include, but are not limited to, deep drawing, injection molding, foaming, blow molding, and extrusion.

[0027] The cartridge may include a mouthpiece configured to allow a user to inhale the aerosol into their mouth or lungs. Where the cartridge includes a mouthpiece, the mouthpiece may include a filter. The filter may have low or very low particulate filtration efficiency. Alternatively, the mouthpiece may include a hollow tube. The mouthpiece may include an airflow regulator, such as a limiter.

[0028] A cartridge may be provided within the mouthpiece tube. The mouthpiece tube may include an aerosol forming chamber. The mouthpiece tube may include an airflow restrictor. The mouthpiece tube may include a filter. The mouthpiece tube may include a cardboard housing. The mouthpiece tube may include one or more vapor-impermeable elements within the cardboard tube. The mouthpiece tube may have a diameter similar to that of a conventional cigarette, for example, about 7 mm. The mouthpiece tube may have a mouth end configured to be placed in the user's mouth for inhalation of the aerosol passing through it. A cartridge may be housed within the mouthpiece tube, for example, at the end opposite the mouth end.

[0029] One or both of the first and second chambers may be closed chambers. In this context, "closed" means sealed at one end. Advantageously, there is only one outlet opening from the chamber. The shell may include at least one liquid- and vapor-impermeable outer wall defining the closed chamber. Advantageously, both the first and second chambers are closed chambers. Using closed chambers reduces the risk of leakage. One or both chambers may be sealed by one or more brittle barrier elements.

[0030] One or more brittle barriers can be formed from any suitable material. For example, one or more brittle barriers can be formed from, for example, a foil or film comprising metal. In cases where the cylinder includes one or more brittle barriers sealing one or both of the first and second chambers, the device body preferably also includes a puncturing member configured to rupture one or more brittle barriers.

[0031] Alternatively or additionally, one or both of the first and second chambers may be sealed by one or more removable barrier elements. For example, one or both of the first and second chambers may be sealed by one or more peelable seal elements.

[0032] One or more removable barriers can be formed from any suitable material. For example, one or more removable barriers can be formed from a foil or film, such as a metal.

[0033] One or both of the first and second chambers may be sealed by a vapor-permeable element, such as a membrane or mesh, configured to allow vapor to escape from the first or second chamber through the membrane or mesh. Alternatively, one or both of the first and second chambers may be sealed by a pressure-activated valve that releases vapor when the differential pressure across the valve exceeds a threshold differential pressure.

[0034] The first and second chambers can be fixed together but separate from each other. The first and second chambers can be supplied separately and secured together by the user using suitable mechanical interlocking, such as a snap-fit ​​or screw connector. Alternatively, the first and second chambers can be held together using separate retaining or securing elements. Alternatively, the first and second chambers can remain separate during use.

[0035] By providing separate first and second chambers, users can obtain a set of "mixing and matching" options. The contents of the first chamber can provide a specific dose of the target compound for delivery to the user, such as a specific density of nicotine or aerosol, and can offer the user a range of options. The contents of the second chamber can primarily provide a flavor compound, and a range of options for the second chamber are available to the user. The user can select one chamber from the range of the first chambers and one chamber from the range of the second chambers, and can combine them to form a complete cartridge.

[0036] Even if the first and second chambers are supplied together and permanently fixed to each other, manufacturers can use the same mixing and matching methods to provide a variety of different cylinder assemblies.

[0037] The first and second chambers may have the same size and shape as each other, or they may have different sizes or shapes. The size and shape of the first and second chambers can be selected to suit their contents and to provide a specific heating rate for use.

[0038] It may also have more than two chambers. It may be necessary to have three or more chambers in the cylinder assembly, with at least two chambers having different contents.

[0039] The cylinder can have any suitable shape.

[0040] Preferably, the tube is substantially cylindrical.

[0041] The tube can be any suitable size.

[0042] The cylinder may have a length, for example, between about 5 mm and about 30 mm. In some embodiments, the cylinder may have a length of about 12 mm.

[0043] The cylinder may have a diameter, for example, between about 4 mm and about 10 mm. In some embodiments, the cylinder may have a diameter of about 7 mm.

[0044] An aerosol generation system may be provided, comprising an aerosol generation device and a cartridge according to any of the above embodiments. Preferably, the aerosol generation device is an electrically operated aerosol generation device. Preferably, the aerosol generation system is configured to generate an aerosol for inhalation by a user. The aerosol generation system may be a handheld system and may include a mouthpiece for the user to inhale or suck during use.

[0045] In one embodiment, an aerosol generation system is provided, comprising: a cartridge including two separate chambers, one chamber containing an aerosol-forming matrix in gel form and the other chamber containing a source of a compound for inhalation; and an aerosol generation device including a power source for an electric heater, the cartridge being configured to be detachably connected to or detachably housed within the aerosol generation device. The separate chambers can be individually connected to and removed from the aerosol generation device. In some embodiments, the cartridge is held within a mouthpiece tube, and the mouthpiece tube is detachably housed within the aerosol generation device.

[0046] The source of compounds for inhalation may include one or both of nicotine sources and flavoring sources.

[0047] The electric heater can be configured to heat a cylinder to generate steam from an aerosol forming matrix within the cylinder. The main body of the device may include a power source and an electric heater. Alternatively, the cylinder may include all or part of the electric heater.

[0048] The aerosol generating device of the aerosol generating system may include a housing having a cavity for receiving a container. The aerosol generating device may include an electrically heating element configured to control the supply of electricity from a power source to an electric heater.

[0049] An electric heating element may include one or more heating elements.

[0050] In a preferred embodiment, the electrically operated aerosol generating device includes an electrically heated element and a housing having a cavity in which a heating cylinder is housed. The heating element can be conveniently shaped as a needle, pin, strip, or blade that can be inserted into one or more slots defined by the cylinder assembly.

[0051] The electric heating element may include one or more external heating elements, one or more internal heating elements, or one or more external heating elements and one or more internal heating elements. In this context, "external" means outside the cavity, and "internal" means inside the cavity used to store the cylinder.

[0052] One or more external heating elements may comprise an array of external heating elements arranged around the inner surface of the cavity. In some instances, the external heating elements extend along the longitudinal direction of the cavity. This arrangement allows the heating elements to extend in the same direction as the cylinder is inserted into and removed from the cavity. This reduces interference between the heating elements and the cylinder compared to devices in which the heating elements are not aligned with the length of the cavity. In some embodiments, the external heating elements extend along the length of the cavity and are spaced apart in the circumferential direction. Where the heating elements include one or more internal heating elements, the one or more internal heating elements may comprise any suitable number of heating elements. For example, the heating element may comprise a single internal heating element. The single internal heating element may extend along the longitudinal direction of the cavity.

[0053] Electrical heating elements may include resistive materials. Suitable resistive materials include, but are not limited to: semiconductors, such as doped ceramics, “conductive” ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic and metallic materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, constantan, nickel-containing alloys, cobalt-containing alloys, chromium-containing alloys, aluminum-containing alloys, titanium-containing alloys, zirconium-containing alloys, hafnium-containing alloys, niobium-containing alloys, molybdenum-containing alloys, tantalum-containing alloys, tungsten-containing alloys, tin-containing alloys, gallium-containing alloys, manganese-containing alloys, and iron-containing alloys, as well as nickel-, iron-, and cobalt-based superalloys, stainless steel, Timetal®, iron-aluminum based alloys, and iron-manganese-aluminum based alloys. Timetal® is a registered trademark of Titanium Metals Corporation (1999 BroadwaySuite 4300, Denver, Colorado). In composite materials, the resistive material may optionally be embedded in, encapsulated in, or coated with an insulating material, or vice versa, depending on the energy transfer kinetics and desired external physicochemical properties. The heating element may comprise a metal etched foil insulated between two layers of inert material. In this case, the inert material may comprise Kapton®, polyimide, or mica foil. Kapton® is a registered trademark of EI du Pont de Nemours and Company, 1007 Market Street, Wilmington, Delaware, 19898, USA.

[0054] The electric heating element can be formed using a metal that has a defined relationship between temperature and resistivity. In such embodiments, the metal can be formed as tracks between two suitable insulating materials. An electric heating element formed in this way can be used as both a heater and a temperature sensor.

[0055] When the electric heating element includes a sensor, the aerosol generating apparatus body preferably includes an inductor arranged to generate a undulating electromagnetic field within the cavity and a power supply connected to the inductor. The inductor may include one or more coils for generating the undulating electromagnetic field. The one or more coils may surround the cavity.

[0056] Preferably, the device is capable of generating a fluctuating electromagnetic field between 1 and 30 MHz, for example between 2 and 10 MHz, or for example between 5 and 7 MHz. Preferably, the device is capable of generating a fluctuating electromagnetic field with a field strength (H field) between 1 and 5 kA / m, for example between 2 and 3 kA / m, or for example about 2.5 kA / m.

[0057] The aerosol generation system of the aerosol generation apparatus according to the invention may include a single heater. This advantageously provides a simple apparatus construction. The single heater may be configured as an external heater positioned outside the cavity during use. Alternatively, the single heater may be configured as an internal heater positioned inside the cavity during use and housed in a slot within the cylinder. Preferably, the single heater is configured as an internal heater.

[0058] When the single heater is configured as an internal heater, the aerosol generating apparatus may advantageously include a guide member to facilitate proper alignment of the internal heater with the cylinder.

[0059] Preferably, the individual heater is an electric heating element comprising a resistive material. The electric heating element may comprise a non-elastic material, such as a ceramic sintered material, such as glass, alumina (Al2O3) and silicon nitride (Si3N4), or a printed circuit board or silicone rubber. Alternatively, the electric heating element may comprise an elastic metallic material, such as an iron alloy or a nickel-chromium alloy.

[0060] A single heater can have any shape suitable for the two chambers of the heating cylinder. When the cylinder is connected to or housed within the device body, the electric heater can be positioned between the first and second chambers. In a preferred embodiment, the single heater is an elongated internal electric heating element. In a particularly preferred embodiment, the single heater is an elongated internal electric heating element with a width greater than its thickness, such that the elongated internal electric heating element takes the form of heater blades.

[0061] Preferably, the heater does not protrude from the aerosol generating device.

[0062] The aerosol generation system may include more than one heater to allow for different or selective heating of the first and second chambers. For example, it may be necessary to heat the first chamber to a different temperature than the second chamber.

[0063] The aerosol generation system and aerosol generation apparatus according to the invention may further include one or more temperature sensors configured to sense the temperature of at least one electric heater. In such embodiments, a controller may be configured to control the power supply to the electric heater based on the sensed temperature.

[0064] Any suitable electronic circuit can be used to control the power supply to the electric heating element. The electronic circuit can be a simple switch. Alternatively, the electronic circuit may include one or more microprocessors or microcontrollers. The electronic circuit can be programmable.

[0065] The power source can be a DC voltage source. In a preferred embodiment, the power source is a battery. For example, the power source can be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery, such as a lithium cobalt, lithium iron phosphate, or lithium polymer battery. Alternatively, the power source can be another form of charge storage device, such as a capacitor. The power source may need to be rechargeable and may have a capacity that allows sufficient energy storage for the aerosol generating device and one or more aerosol generating cartridges.

[0066] Preferably, the aerosol generating device includes a body portion containing a power source and a mouthpiece portion configured to engage with the body portion. The body portion may be configured to house a cartridge or cartridge assembly within a cavity. By providing a reusable mouthpiece separate from the cartridge, the cartridge construction can be simple and inexpensive.

[0067] Preferably, the cavity of the aerosol generating device is substantially cylindrical.

[0068] As used herein with reference to the invention, the terms "cylinder" and "cylindrical" refer to a substantially straight cylinder having a pair of opposing substantially flat end faces.

[0069] Preferably, the diameter of the cavity of the aerosol generating device is approximately equal to or slightly larger than the diameter of the cylinder.

[0070] Advantageously, the system does not include a delivery mechanism for conveying the aerosol forming agent to the heater. Advantageously, the contents of the cylinder are heated in situ to generate the desired aerosol. In this context, "in situ" means in the same position as the contents were in the first and second chambers before use. No capillary wick or pump is required.

[0071] In cases where the cylinder includes one or more fragile barriers that seal one or both of the first and second chambers, the aerosol generating device preferably further includes a puncturing member configured to rupture one or more fragile barriers.

[0072] Preferably, the aerosol generating device is a portable or handheld aerosol generating device that can be comfortably held between the fingers of a single hand by a user.

[0073] The aerosol generating device can be substantially cylindrical in shape. The length of the aerosol generating device can be between approximately 70 mm and approximately 120 mm. Attached Figure Description

[0074] The invention will now be described further with reference to the accompanying drawings, which further illustrate embodiments of the invention, and in which:

[0075] Figure 1 This is a schematic illustration of an aerosol generation system according to a first embodiment of the present invention;

[0076] Figure 2a This is a perspective view of the mouthpiece portion according to a first embodiment of the present invention;

[0077] Figure 2b This is a bottom perspective view of the cylindrical shell according to a first embodiment of the present invention;

[0078] Figure 2c yes Figure 2b Top perspective view of the cylindrical component;

[0079] Figure 2d exhibit Figure 2b One of the chambers of the cylindrical assembly;

[0080] Figures 3a to 3c This describes an embodiment where the mouthpiece portion punctures the brittle seal on the cylinder according to the present invention;

[0081] Figure 4 This is a schematic illustration of an aerosol generation system according to another embodiment of the present invention;

[0082] Figure 5 This is a schematic illustration of an aerosol generation system according to another embodiment of the present invention;

[0083] Figure 6a This is a schematic illustration of a cylindrical assembly held within a mouthpiece tube according to another embodiment of the invention.

[0084] Figure 6b yes Figure 6a An exploded view of the components inside the mouthpiece tube; and

[0085] Figure 7 Through Figure 6a A diagram illustrating the airflow through the mouthpiece tube. Detailed Implementation

[0086] Figure 1 This is a schematic illustration of an aerosol generation system according to a first embodiment of the present invention. The system includes an aerosol generation device 10 and a replaceable cartridge 20. The aerosol generation device includes a device body 12 and a mouthpiece portion 14.

[0087] The device body 12 includes a power source, which is a lithium-ion battery 16, and an electronic control circuit 18. The device body also includes a heater 22 in the form of blades that protrude into a cavity 24 within the housing of the device body. The heater is an electric heater that includes resistance rails on a ceramic substrate material. The control circuit is configured to control the power supply from the battery 16 to the electric heater 22.

[0088] The mouthpiece portion 14 uses a simple push-fit connector to engage the main body, but any type of connection can be used, such as a snap-fit ​​connector or a screw connector. In this embodiment, the mouthpiece portion is simply a conical hollow tube without any filter element, and... Figure 2a The details are shown in more detail below. However, it is possible to include one or more filter elements in the mouthpiece portion. The mouthpiece portion includes an air inlet 42 and surrounds an aerosol forming chamber 40. Figure 1 (as shown in the image), where steam can condense in the airflow before entering the user inlet.

[0089] Cylinder 20 includes a shell defining two enclosed chambers. The two chambers 30, 32 open at the mouthpiece end. Membrane 37 ( Figure 1 (As shown in the diagram) The open end of the sealed chamber. A removable seal may be provided on the membrane, which the user can peel off before use. A closed slot 34 is provided between the two chambers to house the heater 22 therein. The closed slot 34 is closed at the mouthpiece end. The first chamber 30 contains a first gel containing nicotine and an aerosol forming agent, and the second chamber 32 contains a second gel containing shredded tobacco leaves.

[0090] Figure 2b This is a bottom perspective view of the cylindrical assembly housing. Figure 2c This is a perspective view of the cylinder assembly housing. The cylinder 20 has a generally cylindrical shape. A first chamber 33 and a second chamber 35 are separate and of the same size and shape, and are held together at an interface 36. The first chamber 33 and the second chamber 35 are held together by a retaining ring 39. Both chamber housings engage the retaining ring 39. Other methods of holding the chambers together are possible, such as individual clips or brackets, or providing interlocking or snap-fit ​​features on each chamber. When the chambers are held together, a closed slot 34 is formed between the chambers. A channel 38 is provided in the wall of one chamber 35 to engage corresponding ribs in the cavity 24. This ensures that the cylinder assembly can only be inserted into the cavity 24 in one orientation, with the heater blades received in the slot 34.

[0091] Figure 2d Show Figure 2b and 2c The housing of one of the chambers shown illustrates the shape of a closed slot 34. The shape of the slot matches the shape of the heater blades.

[0092] The first gel in the first chamber 30 comprises one or two aerosol forming agents, such as glycerol and polyethylene glycol. The relative concentrations of the aerosol forming agents can be adapted to the specific requirements of the system. In this embodiment, the gel in the first chamber 30 comprises (by weight): 2% nicotine, 70% glycerol, 27% water, and 1% agar.

[0093] The gelling agent is preferably agar. It has the property of melting at temperatures above 85°C and reverting to a gel at about 40°C. This property makes it suitable for thermal environments. The gel will not melt at 50°C, which is useful, for example, when the system is in a hot car under sunlight. The phase transition to liquid at about 85°C means that the gel only needs to be heated to a relatively low temperature to initiate aerosolization, thus achieving low energy consumption. Using only agarose instead of agar as a component of agar may be beneficial.

[0094] The second gel in the second chamber 32 comprises (by weight): 65% glycerol, 20% water, 14.3% solid powdered tobacco, and 0.7% agar.

[0095] For example, other or different flavorings of menthol can be added to water, propylene glycol, or glycerol before any gel is formed.

[0096] The amount of gel provided in each cartridge can also be selected to suit specific needs. Each cartridge may contain enough gel to provide a single dose or duration of use for the user, or enough gel to provide for several or more doses or durations of use.

[0097] During operation, the system is configured to operate in continuous heating mode. This means that heater 22 heats the cylinder throughout the entire operation period, rather than in response to a sensed user suction. The user turns on the system using a simple switch (not shown), and the heater heats the cylinder. A temperature sensor may be included in the system to provide the user with an indication of when the operating temperature for aerosol generation has been reached. The gel is heated above 85°C. o After C, it becomes a liquid. The aerosol containing nicotine and glycerol is generated at temperatures between 180°C and 250°C. During operation, the heater operates at approximately 250°C. The heater can operate for a fixed period after activation, such as 6 minutes, or until the user shuts off the system. The operating time may depend on the amount of gel contained in the cartridge.

[0098] The shell is made of aluminum, a good thermal conductor. The heater never comes into contact with gel or any generated vapors or aerosols. It is held in place within a closed slot 34 and thus isolated from generated aerosols. This ensures that no condensate buildup occurs on the heater, which could lead to the formation of undesirable compounds during operation.

[0099] Figures 3a to 3c This describes an embodiment where each chamber of the cartridge is sealed by a brittle sealing element. The mouthpiece portion is used to puncture the sealing element to allow vapor generated in the chambers to escape from both chambers.

[0100] Figure 3a Instructions: Insert the tube 20 into the device 12. (Example) Figure 1 The cylinder includes a first chamber 30, a second chamber 32, and a closed slot 34 between the chambers. The chambers are sealed by a sealing element 50.

[0101] Figure 3b The tube inserted into the device is shown, with the heater 22 housed in a slot 34 between the chambers. Next, the mouthpiece portion 14 is connected to the main body portion 12 of the device. Figure 3b Indicate the direction of insertion of the mouthpiece portion. The mouthpiece portion has a piercing element 52, which is used to pierce the brittle sealing element and provide an escape channel 54 for the vapor generated in the first chamber and the second chamber.

[0102] Figure 3c The mouthpiece portion 14 is shown in the fully inserted position, wherein the piercing element 52 extends into the first and second chambers and allows vapor to escape from the first chamber 30 and the second chamber 32 into the aerosol forming chamber within the mouthpiece portion. The vapor is cooled and entrained in the airflow within the mouthpiece portion to form an aerosol, which is then inhaled by the user. Figure 1 In one embodiment, the mouthpiece portion may have an air inlet. Alternatively or additionally, an airflow path into the mouthpiece portion may be provided by a device. Alternatively or additionally, an airflow path may be provided by a first chamber and a second chamber.

[0103] Figure 4 This is a schematic illustration of an aerosol generation system according to another embodiment of the present invention. Figure 4 In this embodiment, heater 122 is located outside the cavity of the device portion, wherein the barrel assembly is received rather than extended into a slot formed within the barrel assembly. Device body 112 includes a power source, which is a lithium-ion battery 116 and electronic control circuitry 118. Device body also includes heater 122, which extends around cavity 124 within the housing of device body. The heater is an electric heater that includes resistance rails provided on a flexible substrate. Specifically, the heating element includes a metal etched foil forming the rails, which is held between two layers of Kapton®. By providing a heater including resistance rails on a flexible substrate, the heater can be more easily manufactured and shaped to conform to the cavity. Control circuitry is configured to control the power supply from battery 116 to electric heater 122.

[0104] Figure 4 The tube and Figure 1The tube shown is similar to the one described above. The composition of the gel in the two chambers of the tube can be combined with... Figure 1 The embodiment is the same. The cylindrical shell is also formed of aluminum. However, in Figure 4 In this embodiment, an open slot 134 is provided instead of a closed slot. The open slot 134 provides an airflow path from the air inlet 142 in the device body to the aerosol forming chamber 140 in the mouthpiece portion 114. It can be used with... Figures 3a to 3c The configuration shown is similar to the tube puncture configuration, allowing the mouthpiece portion 114 to employ an adaptive opening tube suitable for different airflow paths. The two chambers can be connected... Figure 1 The embodiments are separate and held together, or may remain separate from each other during their use.

[0105] During operation, the system is configured to... Figure 1 In this embodiment, it operates in a continuous heating mode. This means that heater 122 heats the cylinder throughout the entire operating period, rather than in response to a sensed user suction. The user turns on the system using a simple switch (not shown), and the heater heats the cylinder. The system may include a temperature sensor, allowing the user to be informed when the operating temperature has been reached. The gel is heated above 85°C. o After C, it becomes a liquid. The aerosol containing nicotine and glycerol is generated at temperatures between 180°C and 250°C. During operation, the heater operates at approximately 250°C. The heater can operate for a fixed period after activation, such as 6 minutes, or until the user shuts off the system.

[0106] Figure 5 This is a schematic illustration of an aerosol generation system according to yet another embodiment of the present invention. Figure 5 The embodiments operate by using induction heating instead of resistance heating. Instead of using a resistance heater around or inside the cavity of the receiving tube, the device body includes an inductor coil surrounding the cavity, and in this example, the inductor is provided inside the cavity as part of the tube.

[0107] The device body 212 includes a power source, which is a lithium-ion battery 216, and an electronic control circuit 218. The device body also includes an induction coil 224 that extends around a cavity within the housing of the device body. The device body also includes electronic circuitry 220 to generate an AC signal supplied to the induction coil 224.

[0108] Cigarette mouthpiece part 214 and Figure 1 The mouthpiece portion shown is similar and surrounds the aerosol forming chamber 240. In this example, an air inlet 242 is provided at the junction of the mouthpiece portion and the device body.

[0109] Figure 4 The tube and Figure 1The tube shown is similar to the one described above. The composition of the gel in the two chambers of the tube can be combined with... Figure 1 The embodiments are the same. However, instead of a closed cavity for housing the heater, the adjacent walls of the two chambers include sensor material 222 heated in an alternating magnetic field, such as an iron layer. In this example, the sensor material is provided as part of the cylinder rather than as part of the device body, but it is possible to provide the sensor material as part of the device body or in both the cylinder and the device body. The entire cylinder shell may be formed of the sensor material, or the sensor material may be provided as a coating on one of the additional surfaces of the cylinder. The sensor material may also be provided in the first and second chambers, suspended in the gel or in other materials contained in the gel.

[0110] Provide sealing elements according to reference Figure 1 The described method seals the first and second chambers. This can be used with... Figures 3a to 3c The configuration shown is similar to the tube puncture configuration, using the mouthpiece portion 114 to employ an adaptive opening tube suitable for different airflow paths. Alternatively, a simple peelable seal and a vapor-permeable membrane provided at the open ends of the first chamber 230 and the second chamber 232 can be used.

[0111] During operation, the system is configured to... Figure 1 In this embodiment, it operates in a continuous heating mode. This means that when the user turns on the device, the device supplies an AC signal to the induction coil to generate an alternating magnetic field in the cavity. This induces a current flow in the sensor, resulting in heating of the sensor. If a ferromagnetic material is used as the sensor, hysteresis losses may also cause heating. In this context, the induction coil can be described as an induction heater. The temperature in the first and second chambers can be controlled by controlling the amplitude and frequency of the AC signal. Temperature sensors can be provided inside the cavity, and a feedback control loop can be used. Again, the induction heater can operate for a fixed period of time after activation, such as 6 minutes, or it can operate until the user turns off the system.

[0112] Figure 6a This is a schematic illustration of another embodiment of the present invention. Figure 6a In this embodiment, the cylinder 330 is held within the mouthpiece tube 300. The flow limiter 350 and the lining tubes 340, 360, and 370 are also held within the mouthpiece tube. Figure 6b The exploded view shows the component held within the mouthpiece tube 330.

[0113] Cylinder 330 and Figure 2c The cylinder shown is similar and includes separate chamber housings. However, cylinder 330 does not have a membrane or sealing element, but includes an airflow passage 335 formed in the cylinder wall and an air inlet 334 at the top of the airflow passage to allow air to enter the open ends of the first and second chambers.

[0114] The mouthpiece tube is formed of cardboard and has a diameter of 6.6 mm and a length of 45 mm. The liner tube 340 is formed of polyetheretherketone (PEEK) and is provided to prevent the cardboard mouthpiece tube from absorbing moisture from within the mouthpiece tube. In this embodiment, the liner tube can be made extremely thin, with a thickness of 0.3 mm. A restrictor 350 is provided to restrict airflow to ensure that air mixes with vapor from the cartridge and to ensure that an aerosol is generated in the space behind the restrictor within the liner tube 360.

[0115] Figure 7 Instructions during operation Figure 6a The airflow inside the mouthpiece tube. The mouthpiece tube is shown in... Figure 1 The device 12 of the type shown in the figure is located in the cavity 24, but does not have a mouthpiece 14. Figure 7 Only the end of the device for housing the mouthpiece tube is shown. The battery and control circuitry are not shown. The device includes an air inlet 355 that allows air to enter an internal airflow passage 365, which is formed around the periphery of the cavity 24 within the device. A spacer element 352 is positioned in the base of the cavity to allow air to flow from the internal airflow passage 365 into the cavity 24, then into the airflow channel 335 in the cylinder 330, and through the air inlet 334 into the interior of the mouthpiece tube.

[0116] Figure 6a and 6b The cylinder shown can be made of Figure 1 The types shown in Figure 4 Or a heater of the type shown in Figure 5. In operation, the system is configured to... Figure 1 The system operates in a continuous heating mode. This means that the heater heats the cylinder throughout the entire operating period, rather than in response to a sensed user suction. The user turns on the system using a simple switch (not shown), and the heater heats the cylinder. The gel in the first and second chambers liquefies upon heating, and vapors containing nicotine and glycerol are generated at temperatures between 180°C and 250°C.

[0117] When the system is at operating temperature, the user inhales through the mouthpiece tube to draw air in. Air is drawn into the distal end of the mouthpiece tube opposite the mouthpiece end of the internal passage 365. The air advances upward from the airflow passage 335 and enters the space 345 through the air inlet 334. In the space 345, the air mixes with vapor from the first and second chambers. The mixed air and vapor then pass through a restrictor 350, after which it is cooled to continue forming an aerosol before being drawn into the user's mouth. After operation, the mouthpiece tube containing the cartridge can be retracted from the device and disposed of. This type of mouthpiece tube can be sold in package form to provide multiple operations of the system.

[0118] The described embodiments are each described as being configured to operate a continuous heating scheme, wherein the heater is activated within a predetermined time period during which the user can perform multiple suctions. However, the described system can be configured to operate in different ways. For example, based on a signal from an airflow sensor within the system, power can be supplied to the heater or induction coil only for the duration of each user suction. Alternatively or additionally, power supplied to the heater or induction coil can be turned on or off in response to a user-activated button or switch.

[0119] The figures illustrate specific embodiments of the invention. However, it should be clearly understood that modifications can be made to the described embodiments within the scope of the invention. Specifically, different arrangements of airflow through the system can be provided, and different heating arrangements, such as non-electric heaters, can be envisioned.

Claims

1. A cylinder for an aerosol generation system, the cylinder comprising: A first chamber, the first chamber having a first chamber shell; and a second chamber, separate from the first chamber and having a second chamber shell, wherein the first chamber contains an aerosol-forming matrix in gel form, and wherein the second chamber contains a source of compounds for inhalation. The first chamber housing and the second chamber housing are either separate from each other or can be separated from each other. The aerosol generation system includes an aerosol generation device, and the first chamber and the second chamber are separately connectable to and separately removeable from the aerosol generation device. One or both of the first chamber and the second chamber are closed chambers.

2. The cylinder according to claim 1, wherein the first chamber and the second chamber are both closed chambers.

3. The cylinder according to claim 2, wherein the first chamber and the second chamber are positioned side by side.

4. The cylinder of claim 3, wherein the cylinder includes a slot between the first chamber and the second chamber, the slot being configured to receive a heating element.

5. The cylinder according to claim 4, wherein the slot is a closed slot.

6. The cylinder according to claim 1, wherein one of the first chamber and the second chamber is located inside the other of the first chamber and the second chamber.

7. The cylinder of claim 1, wherein the first chamber and the second chamber are arranged in series such that, in use, airflow passes through or flows through one of the first chamber and the second chamber, and then passes through or flows through the other of the first chamber and the second chamber.

8. The cylinder according to any one of claims 1 to 7, wherein the interior of the first chamber or the second chamber is coated or treated to contain one or more thermally conductive materials.

9. The cylinder according to any one of claims 1 to 7, wherein the cylinder is configured to be induction heated, the cylinder comprising a housing, and the housing comprising a sensor.

10. The cylinder according to claim 9, wherein the receptor is a receptor layer forming the wall of the housing.

11. The cylinder according to any one of claims 1 to 7, wherein the cylinder includes a receptor and the receptor is located in the first chamber or the second chamber.

12. The tube according to any one of claims 1 to 7, wherein the gel comprises a receptor material.

13. The cylinder according to any one of claims 1 to 7, wherein the first chamber housing and the second chamber housing are connected to each other by mechanical interlocking or by fastening elements.

14. The cylinder according to claim 13, wherein the first chamber housing and the second chamber housing are connected to each other by the mechanical interlock, the mechanical interlock being a snap-fit ​​connector or a screw connector.

15. The tube according to any one of claims 1 to 7, wherein the gel comprises a thermally reversible gel.

16. The tube according to any one of claims 1 to 7, wherein the gel is provided as a plurality of gel elements.

17. The tube according to any one of claims 1 to 7, wherein the second chamber comprises a second gel containing a source of compound for inhalation.

18. The cylinder according to any one of claims 1 to 7, wherein the first chamber and the second chamber comprise different compositions.

19. An aerosol generation system, comprising: The cylinder according to any of the preceding claims; as well as The main body of the device includes a power supply for the electric heater. The cylinder is configured to be removably connected to the device body or removably housed within the device body.

20. The aerosol generation system of claim 19, wherein the aerosol generation system includes more than one heater to allow different or selective heating of the first chamber and the second chamber.

21. The aerosol generating system of claim 19, wherein the aerosol generating device comprises at least one electric heating element and a housing having a cavity for receiving the cylinder, the at least one electric heating element comprising one or more external heating elements outside the cavity.

22. The aerosol generating system of claim 19, wherein the aerosol generating device comprises an electric heating element and a housing having a cavity for receiving the cylinder, the electric heating element comprising one or more external heating elements located outside the cavity and one or more internal heating elements located inside the cavity.

23. The aerosol generation system of claim 19, wherein the electric heater is configured to heat the cylinder to generate vapor from the aerosol forming agent within the cylinder, but wherein the electric heater does not directly contact the aerosol forming matrix.

24. The aerosol generation system of claim 19, wherein the electric heater is configured to heat the aerosol forming matrix within the first chamber housing.

25. The aerosol generation system of claim 19, wherein the device body includes the power source and the electric heater, and wherein the electric heater is located between the first chamber and the second chamber when the cylinder is connected to or housed in the device body.

26. A cylinder for an aerosol generation system, the cylinder comprising: A first chamber, the first chamber having a first chamber shell; and a second chamber, separate from the first chamber and having a second chamber shell, wherein the first chamber contains an aerosol-forming matrix in gel form, and wherein the second chamber contains a source of compounds for inhalation. The first chamber housing and the second chamber housing are either separate from each other or can be separated from each other.

27. A gel for use in an aerosol generation system, wherein the gel comprises: Agar between 0.5 and 5% by weight; Nicotine between 0.1 and 2% by weight; and Glycerin between 30 and 90% by weight Furthermore, the gel is a thermally reversible gel, meaning that the gel becomes fluid when heated to its melting temperature and solidifies back into a gel at its gelation temperature, wherein the melting temperature is above 50 degrees Celsius. Furthermore, the gel is in the form of multiple gel elements, which are beads.

28. A gel for use in an aerosol generation system, wherein the gel comprises: Gel gum between 0.5 and 5% by weight; Nicotine between 0.1 and 2% by weight; and Glycerin between 30% and 99.4% by weight, Furthermore, the gel is described as a thermally reversible gel, meaning that the gel becomes a fluid when heated to its melting temperature and solidifies back into a gel at its gelation temperature, wherein the melting temperature is above 80°C. And the gel is in the form of a single block.

29. A cylinder for an aerosol generation system, the cylinder comprising: A first chamber, the first chamber having a first chamber shell; and a second chamber, separate from the first chamber and having a second chamber shell, wherein the first chamber contains an aerosol-forming matrix in gel form, and wherein the second chamber contains a source of compounds for inhalation. One of the first chamber and the second chamber is located inside the other of the first chamber and the second chamber. The cylinder is configured to be induction heated, the cylinder includes a shell, and the shell includes receptors, wherein the receptors are receptor layers forming the walls of the shell. The gel contains receptor material.

30. A cylinder for an aerosol generation system, the cylinder comprising: A first chamber, the first chamber having a first chamber shell; and a second chamber, separate from the first chamber and having a second chamber shell, wherein the first chamber contains an aerosol-forming matrix in gel form, and wherein the second chamber contains a source of compounds for inhalation. The first chamber and the second chamber are positioned side by side. The cylinder includes a slot between the first chamber and the second chamber, the slot being configured to receive a heating element. The slot mentioned above is a closed slot. The interior of either the first or second chamber is coated or treated to contain one or more thermally conductive materials.

31. An aerosol generation system, comprising a cylinder and a device body, wherein the cylinder comprises: A first chamber, the first chamber having a first chamber shell; and a second chamber, separate from the first chamber and having a second chamber shell, wherein the first chamber contains an aerosol-forming matrix in gel form, and wherein the second chamber contains a source of compounds for inhalation. The first chamber housing and the second chamber housing are either separate from each other or can be separated from each other. The aerosol generation system includes an aerosol generation device, and the first chamber and the second chamber are separately connectable to and separately removeable from the aerosol generation device. Both the first chamber and the second chamber are closed chambers. The first chamber and the second chamber are positioned side by side. The cylinder includes a slot between the first chamber and the second chamber, the slot being configured to receive a heating element. The slot mentioned above is a closed slot. The interior of either the first or second chamber is coated or treated to contain one or more thermally conductive materials. The first chamber housing and the second chamber housing are connected to each other by a mechanical interlock, which is a snap-fit ​​connector or a screw connector. And the main body of the device includes: Power supply for electric heaters, and The electric heater, The cylinder is configured to be removably connected to the device body or removably housed within the device body. When the cylinder is connected to or housed within the device body, the electric heater is positioned between the first chamber and the second chamber.

32. An aerosol generation system, comprising a cylinder and a device body, wherein the cylinder comprises: A first chamber, the first chamber having a first chamber shell; and a second chamber, separate from the first chamber and having a second chamber housing, wherein the first chamber contains an aerosol-forming substrate in gel form, and wherein the second chamber contains a source of compounds for inhalation. One of the first chamber and the second chamber is located inside the other of the first chamber and the second chamber. The cylinder is configured to be induction heated, the cylinder includes a shell, and the shell includes receptors, wherein the receptors are receptor layers forming the walls of the shell. The gel contains receptor material. The first chamber housing and the second chamber housing are connected to each other by fastening elements. The gel is provided as a plurality of gel elements. The second chamber contains a second gel containing a source of compounds for inhalation. The first chamber and the second chamber contain different compositions. And the main body of the device includes: Power supply for electric heaters, and The electric heater, The cylinder is configured to be removably connected to or removably housed within the device body. The aerosol generation system includes more than one heater to allow for different or selective heating of the first chamber and the second chamber. The aerosol generating device includes at least one electric heating element and a housing having a cavity for receiving the cylinder, wherein the at least one electric heating element includes one or more external heating elements located outside the cavity.

33. An aerosol generating apparatus, comprising: At least one electric heating element and a housing having a cavity for storing the cylinder, The at least one electric heating element includes an array of external heating elements arranged around the inner surface of the cavity, wherein the external heating elements extend along the longitudinal direction of the cavity. The at least one of the electric heating elements comprises a resistive material, which is doped silicon carbide.

34. An aerosol generating apparatus, comprising: An electric heating element and a housing having a cavity for storing the cylinder. The electric heating element includes a sensor. The aerosol generating device includes a sensor arranged within the cavity to generate a fluctuating electromagnetic field and a power supply connected to the sensor. The aerosol generating device described herein is capable of generating a fluctuating electromagnetic field between 1 and 30 MHz. The aerosol generating device described herein is capable of generating a fluctuating electromagnetic field with a field strength (H-field) between 1 and 5 kA / m.

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