RU2795920C1 - Aerosol-generating device with sealing elements in the cavity, product and system - Google Patents

Abstract

FIELD: tobacco industry.

SUBSTANCE: invention relates to devices imitating smoking. The aerosol-generating device comprises a cavity configured to accommodate an aerosol generating article. The first sealing element is located along the side wall of the cavity and is configured to contact the first sealing wrapper of the aerosol-generating device. The first sealing element is located in the upstream portion of the cavity. The second sealing element is made with the possibility of contact with the second sealing wrapper. The second sealing element is located in the downstream part of the cavity. The device contains a power supply and an external heating element. The aerosol-generating device comprises wrapping paper wrapped around the outer circumference of the aerosol-generating device. A first sealing wrapper is capable of air-tight engagement with the first sealing element of the aerosol-generating device. The first seal wrap partially covers the wrapping paper and increases the diameter of the aerosol-generating device in the region of the first seal wrap. The second sealing wrapper is configured to enter into hermetic engagement with the second sealing element of the aerosol-generating device. The first seal wrap is located in the upstream portion of the aerosol-generating device. The second seal wrap is located in the downstream portion of the aerosol-generating device. An aerosol-generating system is claimed.

EFFECT: prevention of air flow between the side wall of the cavity and the aerosol-generating device, and between two sealing elements.

13 cl, 9 dwg

Description

The present invention relates to an aerosol generating device, an aerosol generating article and an aerosol generating system.

There are known cases of providing an aerosol generating device for generating inhaled vapor (see, for example, RF patent 2672650 C2, A24F 47/00, 11/16/2018). Such devices can heat the aerosol-generating substrate to a temperature at which one or more components of the aerosol-generating substrate vaporize without burning the aerosol-generating substrate. The aerosol generating substrate may be provided as part of the aerosol generating article. The aerosol generating article may be in the form of a rod for inserting the aerosol generating article into a cavity, such as a heating chamber, of the aerosol generating device. A heating element may be located in or around the heating chamber to heat the aerosol generating substrate after the aerosol generating article is inserted into the heating chamber of the aerosol generating device.

Ambient air is typically drawn into the heating chamber and through the aerosol generating article. In use, all of the incoming air cannot be completely drawn through the aerosol generating product. This may be due, for example, to a gap between the aerosol generating article and the side wall of the heating chamber. Such a gap may cause some air to escape from the heating chamber without passing through the aerosol generating article and being trapped in the vaporized aerosol generating substrate. This may result in reduced delivery of the aerosol to the user. Such a gap may cause the generated aerosol to exit the heating chamber without passing through the mouthpiece member of the aerosol generating device or aerosol generating article for delivery to the user. This may result in reduced delivery of the aerosol to the user. The gap may be the result of manufacturing tolerances. The gap may result from thermal deformation of parts of the aerosol generating device or aerosol generating article during use. The gap can adversely affect the heating efficiency due to the loss of part of the air flow through the gap between the aerosol generating article and the heating chamber.

It would be desirable to provide an aerosol generating device with improved heating efficiency. It would be desirable to provide an aerosol generating device having improved airflow. It would be desirable to provide an aerosol generating device in which ambient air is drawn in completely through the placed aerosol generating article.

According to one embodiment of the present invention, an aerosol generating device is provided which may include a cavity. The cavity may be configured to accommodate an aerosol generating article. The device may further comprise a first sealing element located along the side wall of the cavity. The first sealing element may be located in an upstream portion of the cavity. The device may further comprise a second sealing element. The second sealing element may be located in the downstream part of the side wall of the cavity. In some embodiments, the first sealing member may be configured to provide an annular seal between the side wall of the cavity and the aerosol generating article when the aerosol generating article is placed in the cavity. In some embodiments, the second sealing member may be configured to provide an annular seal between the side wall of the cavity and the aerosol generating article when the aerosol generating article is placed in the cavity.

According to one embodiment of the present invention, an aerosol generating device is provided, comprising a cavity. The cavity is configured to accommodate an aerosol generating product. The device further comprises a first sealing element located along the side wall of the cavity. The first sealing element is located in the upstream portion of the cavity. The device further comprises a second sealing element. The second sealing element is located in the downstream part of the side wall of the cavity.

By providing two sealing members in the downstream portion and the upstream portion of the cavity, respectively, an air flow is forced through the aerosol generating article. By providing two sealing elements according to the present invention in the downstream part of the cavity and the upstream part of the cavity, air flow between the side wall of the cavity and the aerosol generating article between the two sealing elements is substantially or completely prevented. The provision of two sealing elements according to the present invention helps to prevent air leakage from the aerosol generating article downstream of one sealing element. If air leaks from the aerosol generating article downstream of one sealing member, then such air may be heated as it passes along the heating chamber, which may result in delivery of hot air to the user in addition to the generated aerosol. Such hot air can be unpleasant for the user. Hot air between the cavity side wall and the aerosol generating article may also be undesirable due to potential contamination of the hot air, such as by-products/due to outgassing from the heating element, heating element connections, wires, or wire insulation material. The present invention helps to overcome these problems.

The distance between the two sealing members is preferably equal to substantially the entire length of the substrate portion of the aerosol generating article placed in the cavity. The present invention provides an aerosol generating device while preventing airflow from exiting a cavity other than through the aerosol generating article.

The cavity may be a heating chamber. The cavity may be cylindrical. The cavity may have a hollow cylindrical shape. The cavity may have a circular cross section. If necessary, the cavity may have a shape deviating from a cylindrical shape, or a cross section deviating from a circular cross section. The cavity may be shaped to match the shape of the aerosol generating article to be placed in the cavity. The cavity may have an elliptical or rectangular cross section. At the upstream end of the cavity, the cavity may have a base. The base may be round. One or more air inlets may be located at or adjacent to the base. An air flow channel may pass through the cavity. Through the air flow passage, ambient air can be drawn into the aerosol generating device into the cavity and towards the user. A mouthpiece may be located downstream of the cavity, or the user may directly puff through the aerosol generating article. The air flow channel may pass through the mouthpiece.

The side wall of the cavity may surround the cavity. The side wall may connect the base of the cavity at the upstream end of the cavity and the downstream end of the cavity. The downstream end of the cavity may be open. The open downstream end may be configured to insert an aerosol generating article. The upstream end of the cavity may abut the upstream end of the side wall. The downstream end of the cavity may abut the downstream end of the side wall.

The first sealing element may be located in the upstream part of the side wall of the cavity. The first sealing element may prevent the flow of air in the area of the first sealing element. The upstream portion is the portion or region adjacent to the upstream end of the cavity. The upstream portion may be part of a sidewall adjacent to or near the base of the cavity. The upstream portion of the side wall may extend less than 50% of the side wall length from the upstream end of the cavity, preferably less than 40% of the side wall length from the upstream end of the cavity, preferably less than 30 % of the side wall length from the upstream end of the cavity, preferably less than 20% of the side wall length from the upstream end of the cavity, and more preferably less than 10% of the side wall length from the upstream end of the cavity.

The second sealing element may be located in the downstream part of the side wall of the cavity. The second sealing element may prevent air flow in the region of the second sealing element. The downstream portion is the portion or region adjacent to the downstream end of the cavity. The downstream portion may be part of a side wall adjacent to or adjacent to the open end of the cavity. The downstream portion of the side wall may extend less than 50% of the side wall length from the downstream end of the cavity, preferably less than 40% of the side wall length from the downstream end of the cavity, preferably less than 30 % of the side wall length from the downstream end of the cavity, preferably less than 20% of the side wall length from the downstream end of the cavity, and more preferably less than 10% of the side wall length from the downstream end of the cavity.

One or both of the first and second sealing elements may be annular. One or both of the first and second sealing elements may have a circular cross section. One or both of the first and second sealing elements may have a rectangular cross section. One or both of the first and second sealing elements may completely surround the cavity. Each of the first and second sealing members may be configured to provide an annular seal between the side wall of the cavity and the aerosol generating article when the aerosol generating article is placed in the cavity. One or both of the first and second sealing elements may be located in a plane perpendicular to the longitudinal axis of the cavity. One or both of the first and second sealing elements may be located in a plane perpendicular to the longitudinal axis of the aerosol generating device. One or both of the first and second sealing elements may be in the form of sealing rings. One or both of the first and second sealing elements may comprise a heat resistant material. One or both of the first and second sealing elements may consist of a heat resistant material. One or both of the first and second sealing elements may have an inner diameter corresponding to or slightly smaller than the outer diameter of the aerosol generating article. One or both of the first and second sealing elements may have an outer diameter corresponding to or slightly larger than the inner diameter of the side wall of the cavity.

One or both of the first and second sealing members may be stationary. One or both of the first and second sealing members may be located in a groove in the side wall of the cavity. The groove may be configured to engage with one or both of the first and second sealing members. The first sealing element may be located in the first groove of the side wall. The first sealing element may be installed in the first groove of the side wall. The second sealing element may be located in the second groove of the side wall. The second sealing element may be installed in the second groove of the side wall. The first groove may be located in an upstream portion of the side wall of the cavity. The second groove may be located in the downstream part of the side wall of the cavity.

In some embodiments, the aerosol generating device includes a power supply and a heating element. In some embodiments, the implementation of the heating element contains an external heating element. In some embodiments, the implementation of the heating element contains an internal heating element. In some embodiments, the implementation of the heating element contains both an internal heating element and an external heating element.

The power supply may be a battery. The power supply may be located in the main body of the aerosol generating device. In some embodiments, the power supply is a lithium ion battery. In some embodiments, the power supply may be a nickel metal hydride battery, a nickel cadmium battery, or a lithium battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery. Alternatively, the power supply may be another form of charge storage device, such as a capacitor. The power supply may require recharging and may be of sufficient capacity to store enough energy for one or more uses; for example, the power supply may have sufficient capacity to continuously generate an aerosol for a period of approximately six minutes, or for a period of multiples of six minutes. In another example, the power supply may have sufficient capacity to provide a given number of puffs or individual activations of the aerosol generating device.

The heating element may comprise an electrically resistive material. Suitable electrically resistive materials include, but are not limited to: semiconductors such as alloyed ceramics, "conductive" ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made from ceramic material and metal material. . These composite materials may contain alloyed or unalloyed ceramics. Examples of suitable doped ceramics include doped silicon carbides. Examples of suitable metals include titanium, zirconium, tantalum, platinum, gold and silver. Examples of suitable metal alloys include stainless steel, alloys containing nickel, cobalt, chromium, aluminum, titanium, zirconium, hafnium, niobium, molybdenum, tantalum, tungsten, tin, gallium, manganese, gold and iron, and superalloys based on nickel, iron , cobalt, stainless steel, Timetal® and iron-manganese-aluminum alloys. In composite materials, the electrically resistive material may optionally be embedded in, encapsulated in, or coated with the insulating material, or vice versa, depending on the energy transfer kinetics and the desired external physicochemical properties.

The heating element may be part of an aerosol generating device. The aerosol generating device may comprise an internal heating element or an external heating element, or both internal and external heating elements, where "internal" and "external" refer to the aerosol generating substrate. The inner heating element may take any suitable shape. For example, the inner heating element may take the form of a heating plate. Alternatively, the internal heater may take the form of a sheath or substrate with various electrically conductive parts, or an electrically resistive metal tube. Alternatively, the internal heating element may be one or more heating needles or rods extending through the center of the aerosol generating substrate. Other alternatives include a heating wire or filament such as Ni-Cr (nickel-chromium), platinum, tungsten or alloy wire, or a heating plate. Optionally, the internal heating element may be applied internally or externally to the rigid carrier material. In one such embodiment, the electrically resistive heating element may be formed using a metal having a particular relationship between temperature and resistivity. In such an exemplary device, the metal may be formed in a track on a suitable insulating material such as ceramic material and then sandwiched between layers of another insulating material such as glass. The heaters thus formed can be used both for heating and for monitoring the temperature of the heating elements during operation. The internal heating element may be located in the cavity, preferably in the direction of the cavity. An internal heating element may be installed at the base of the cavity.

The external heating element may take any suitable shape. For example, the outer heating element may take the form of one or more sheets of flexible heating foil on a dielectric substrate such as polyimide. The flexible heating foil sheets may be shaped to fit the perimeter of the substrate-receiving cavity. Alternatively, the external heating element may take the form of a metal grid or grids, a flexible printed circuit board, a molded connector (MID), a ceramic heater, a flexible carbon fiber heater, or may be made using a coating technique such as plasma vapor deposition, on a suitable substrate. The external heating element may also be made using a metal having a certain relationship between temperature and resistivity. In such an exemplary device, metal can be formed as a track between two layers of suitable insulating materials. An external heating element provided in this manner can be used both for heating and for monitoring the temperature of the external heating element during operation.

The inner or outer heating element may comprise a heat sink or heat reservoir containing a material capable of absorbing and storing heat and subsequently releasing heat over time into the aerosol forming substrate. The heatsink may be formed from any suitable material such as a suitable metal or ceramic material. In one embodiment, the material has a high heat capacity (sensitive heat storage material) or is a material capable of absorbing and subsequently releasing heat through a reversible process such as a high temperature phase transition. Suitable sensitive heat storage materials include silica gel, alumina, carbon, glass mat, fiberglass, minerals, metal or alloy such as aluminum, silver or lead, and cellulosic material such as paper. Other suitable materials that release heat as a result of a reversible phase change include paraffin, sodium acetate, naphthalene, wax, polyethylene oxide, a metal, a metal salt, a mixture of eutectic salts, or an alloy. The heat sink or heat reservoir may be positioned so that it is in direct contact with the aerosol generating substrate and can transfer the stored heat directly to the substrate. Alternatively, heat stored in a radiator or heat reservoir can be transferred to an aerosol-forming substrate via a heat conductor such as a metal tube.

The heating element advantageously heats the aerosol-forming substrate by conduction. The heating element may at least partially be in contact with the substrate or carrier on which the substrate is applied. Alternatively, heat from either the internal or external heating element may be conducted to the substrate via the heat transfer element.

In operation, the aerosol generating article may be completely contained within the cavity of the aerosol generating device. In this case, the user can puff from the mouthpiece of the aerosol generating device. Alternatively, during operation, the aerosol generating article may be partially placed within the cavity of the aerosol generating device. In this case, the user can puff directly on the aerosol-generating article.

In some embodiments, for example, instead of or in addition to an electrically resistive heating element, the heating element may be in the form of an induction heating element. The induction heating element may comprise an induction coil and a current collector. Typically, a current collector is a material that can absorb electromagnetic energy and convert it into heat. When the pantograph is in an alternating electromagnetic field, eddy currents are usually induced in the pantograph and hysteresis losses occur, which causes the pantograph to heat up. The changing electromagnetic fields generated by one or more induction coils heat the current collector, which then transfers heat to the aerosol generating product, resulting in the formation of an aerosol. Heat transfer can take place mainly by conduction. This heat transfer is best when the current collector is in close thermal contact with the aerosol generating article.

The current collector may be made of any material that can be inductively heated to a temperature sufficient to generate an aerosol from the aerosol forming substrate. A preferred current collector may comprise or consist of a ferromagnetic material, such as a ferromagnetic alloy, ferritic iron or ferromagnetic steel, or stainless steel. A suitable current collector may be or comprise aluminum. Preferred pantographs can be heated to temperatures in excess of 250 degrees Celsius.

Preferred current collectors are metallic current collectors, such as stainless steel. However, current collector materials may also contain graphite, molybdenum, silicon carbide, aluminium, niobium, inconel alloys (superalloys based on austenitic nickel-chromium), metallized films, ceramics such as, for example, zirconium dioxide, transition metals, such as, for example, iron, cobalt, nickel or metalloid components, such as, for example, boron, carbon, silicon, phosphorus, aluminum, or be made from them.

Preferably, the material of the current collector is a metallic material of the current collector. The pantograph may also be a multi-material pantograph and may comprise a first pantograph material and a second pantograph material. In some embodiments, the implementation of the first material of the current collector may be located in direct physical contact with the second material of the current collector. The second current collector material preferably has a Curie temperature that is below the flash point of the aerosol-forming substrate. The first current collector material is preferably used primarily for heating the current collector when the current collector is placed in a changing electromagnetic field. Any suitable material may be used. For example, the first material of the current collector may be aluminum or may be a ferrous material such as stainless steel. The second current collector material is preferably used primarily to indicate when the current collector has reached a particular temperature, this temperature being the Curie temperature of the second current collector material. The Curie temperature of the second pantograph material can be used to control the temperature of the entire pantograph during operation. Suitable materials for the second current collector material may include nickel and certain nickel alloys.

By providing a current collector having first and second current collector materials, heating of the aerosol-forming substrate and control of the heating temperature can be separated. Preferably, the second current collector material is a magnetic material having a second Curie temperature that is substantially the same as the desired maximum heating temperature. That is, it is preferable that the second Curie temperature be approximately the same as the temperature to which the current collector must be heated in order to generate an aerosol from the aerosol-forming substrate.

When using an induction heating element, the induction heating element may be an internal heating element, as described herein, or an external heater, as described herein. If the induction heating element is in the form of an internal heating element, the current-collecting element is preferably in the form of a pin or plate for penetration into the aerosol generating article. If the induction heating element is in the form of an external heating element, the current collector is preferably in the form of a cylindrical current collector at least partially surrounding the cavity or forming a side wall of the cavity.

The device may include a recess in the side wall of the cavity adjacent to the base of the cavity. The recess may completely surround the side wall. The recess may be configured to accommodate remnants of the aerosol generating substrate or debris. In particular, residues of the aerosol generating substrate may adhere to the side wall of the cavity after the aerosol generating article is used up and removed from the cavity. When a new aerosol-generating article is inserted into a cavity, the new aerosol-generating article can scrape residue from the sidewall of the cavity and push the residue toward the base of the cavity. Residues of the aerosol-forming substrate may accumulate at the base of the cavity, which may be undesirable. By providing a recess, these residues can be pushed into the recess during the insertion of a new aerosol generating article into the cavity. The recess may be annular. The recess may have a rectangular cross section. The recess may have a curved cross section. The recess may be located upstream of the first sealing element.

The device may include a lower element located adjacent to the base of the cavity. The lower member may be configured to cover the cavity at the base of the cavity. The bottom member may form the base of the cavity. The lower element may be movable.

The lower element may be movable relative to the base of the cavity. The lower element may be movable from the first position to the second position, wherein in the first position the lower element closes the cavity, and in the second position the cavity is open. The lower element may be made pivotally or slidably attached to the base of the cavity. This may allow the cavity to be opened at the base of the cavity. Opening the cavity can be facilitated by pivoting or sliding the bottom member away from the base of the cavity. The closure of the cavity can be facilitated by pivoting or sliding the lower member towards the base of the cavity. If a recess is provided in the side wall adjacent to the base of the cavity, as described herein, opening the cavity may allow the recess to be cleaned. The upstream end surface of the recess may be formed by the bottom element. In some embodiments, a recess may be provided in the bottom element. A recess in the bottom element can help trap or at least capture residue or debris.

Potentially, in some embodiments, the first and second sealing members are considered optional, for example, if the manufacturing tolerances between the aerosol generating article and the cavity are small enough that airflow between the side wall of the cavity and the aerosol generating article is substantially prevented. In such a case, a bottom member may still be provided to provide access to the cavity at the upstream end of the cavity. In other words, as an alternative or in addition to an aerosol generating device comprising the first and second sealing elements as described herein, an aerosol generating device comprising a lower element as described herein can be provided.

The aerosol generating device may include an electrical circuit. The circuitry may include a microprocessor, which may be a programmable microprocessor. The microprocessor may be part of the controller. The electrical circuit may contain additional electronic components. The electrical circuit may be configured to control the power supply to the heating element. Power may be supplied to the heating element continuously after activation of the aerosol generating device, or may be supplied intermittently, such as from puff to puff. Power may be supplied to the heating element in the form of electrical current pulses. The circuitry may be configured to monitor the electrical resistance of the heating element and preferably control the energization of the heating element in response to the electrical resistance of the heating element.

In some embodiments, the operation of the heating element may be initiated by a puff detection system. In some embodiments, the implementation of the heating element can be initiated by pressing the on/off button, held for the duration of the puff of the user. The puff detection system may be provided in the form of a sensor, which may be in the form of an air flow sensor for measuring the air flow rate. The air flow rate is a parameter characterizing the amount of air that is drawn in by the user along the air flow path of the aerosol generating device per unit of time. Puff initiation can be detected by the airflow sensor when the airflow exceeds a predetermined threshold. Triggering can also be detected when the button is activated by the user.

The sensor may be in the form of a pressure sensor for measuring air pressure within the aerosol generating device that is drawn in by the user along the air flow path of the device when puffed. The sensor may be configured to measure a pressure difference or pressure drop between ambient air pressure outside the aerosol generating device and air pressure that is drawn through the device by a user. Air pressure can be detected at an air inlet, device mouthpiece, heating chamber, or any other passage or chamber in the aerosol generating device through which or through which air flows. When the user puffs through the aerosol generating device, a negative pressure or vacuum is created inside the device, and the negative pressure can be detected by a pressure sensor. The term "negative pressure" should be understood as a pressure that is relatively lower than the ambient air pressure. In other words, when a user puffs through the device, the air that is drawn through the device has a pressure that is lower than the ambient air pressure outside the device. Puff initiation can be detected by the pressure sensor if the pressure difference exceeds a pre-set threshold.

In the context of this document, the terms "upstream" and "downstream" are used to describe the relative positions of the components or parts of the components of the aerosol generating device in relation to the direction in which the user puffs through the aerosol generating device when it is used. . The term "downstream" may refer to a position relatively closer to the mouth end. The term "upstream" may refer to a position relatively further from the mouth end, preferably closer to the opposite end.

As used herein, "aerosol generating device" refers to a device that interacts with an aerosol generating substrate to generate an aerosol. The aerosol generating substrate may be part of an aerosol generating article, such as a part of a smoking article. The aerosol generating device may be a smoking device that interacts with the aerosol generating substrate of the aerosol generating article to generate an aerosol directly inhaled into the user's lungs through the user's mouth. The aerosol generating device may be a holder. The device may be an electrically heated smoking device. The aerosol generating device may include a housing, an electrical circuit, a power supply, a heating chamber, and a heating element.

The present invention also relates to an aerosol generating article comprising:

wrapping paper wrapped around the outer circumference of the aerosol generating article; And

a first seal wrap, wherein the first seal wrap partially covers the wrapping paper and increases the diameter of the aerosol generating article in the region of the first seal wrap.

The aerosol generating article may comprise a substrate portion. The substrate portion may comprise an aerosol-forming substrate. The substrate portion may be located adjacent to the upstream end of the aerosol generating article. The aerosol generating article may further comprise a filter portion. The filter portion may be located adjacent to the downstream end of the aerosol generating article. The wrapping paper may be configured to at least partially surround the substrate portion and partially surround the filter portion to connect and hold together the two parts of the aerosol generating article.

The first sealing wrapper may be annular. The first seal wrap may circumferentially or circumferentially surround the aerosol generating article. The first seal wrapper may encircle the wrapping paper around the circumference or perimeter. The first seal wrap may completely surround the outer circumference or perimeter of the aerosol generating article. The first seal wrap may have a circular or rectangular cross section. The first seal wrap may be made from cigarette paper. The first sealing wrapper may have an outer surface with a high coefficient of friction. The outer surface of the first sealing wrapper may be coated with a high coefficient of friction. The first seal wrapper may be airtight. The first sealing wrapper may be in the form of a coating.

The article may comprise a second seal wrap, wherein the first seal wrap may be located in the upstream portion of the aerosol generating article and the second seal wrap may be located in the downstream portion of the aerosol generating article.

The second sealing wrap may be annular. The second seal wrapper may circumferentially or perimeterly surround the aerosol generating article. The second seal wrapper may circumferentially or circumferentially surround the wrapping paper. The second seal wrap may completely surround the outer circumference or perimeter of the aerosol generating article. The second seal wrap may have a circular or rectangular cross section. The second seal wrapper may be made from cigarette paper. The second sealing wrap may have an outer surface with a high coefficient of friction. The outer surface of the second seal wrap may be coated with a high coefficient of friction. The second seal wrapper may be airtight. The second sealing wrapper may be in the form of a coating.

The wrapping paper may be airtight.

In the context of this document, the term "aerosol generating article" refers to an article containing an aerosol generating substrate that can release volatile compounds that can form an aerosol. For example, an aerosol generating article may be a smoking article that generates an aerosol that is directly inhaled into the user's lungs through the user's mouth. The aerosol generating article may be disposable.

The aerosol generating article may have a substantially cylindrical shape. The aerosol generating article may be substantially oblong. The aerosol generating article may have a length and a circumference substantially perpendicular to the length. The aerosol generating article may be substantially rod-shaped. The aerosol forming substrate may be substantially cylindrical in shape. The aerosol forming substrate may be substantially oblong. The aerosol forming substrate may also have a length and a circumference substantially perpendicular to the length. The aerosol forming substrate may be substantially rod-shaped.

The aerosol generating article may have an overall length of from about 30 mm to about 100 mm. The aerosol generating article may have an outer diameter of from about 5 mm to about 12 mm. The aerosol generating article may contain a filter plug in the filter portion. The filter plug may be located at the downstream end of the aerosol generating article. The filter plug may be a cellulose acetate filter plug. The filter rod may have a length of from about 5 mm to about 15 mm. In some embodiments, the filter plug has a length of approximately 7 mm.

In some embodiments, the aerosol generating article has an overall length of approximately 45 mm. The aerosol generating article may have an outside diameter of approximately 5.3 mm. The smaller the diameter of the substrate, the lower the temperature required to raise the temperature of the core of the aerosol generating article, thereby releasing enough material to form the desired amount of aerosol. At the same time, the small diameter enables rapid penetration of heat into the entire volume of the aerosol-forming substrate. However, if the diameter is too small, the volume to surface area ratio of the aerosol generating substrate becomes unattractive as the amount of available aerosol generating substrate decreases. The preferred diameter range of 5 to 6 millimeters is particularly advantageous in terms of the balance between energy consumption and aerosol delivery. In addition, the aerosol-forming substrate may have a length of approximately 10 mm. Alternatively, the aerosol generating substrate may be about 12 mm long. Alternatively, the aerosol forming substrate may have a length of 10 mm to 32 mm, preferably about 22 mm. In addition, the diameter of the aerosol-forming substrate may be from about 5 mm to about 12 mm. The aerosol generating article may include an outer paper wrapper, such as wrapping paper. In addition, the aerosol generating article may include a gap between the aerosol generating substrate and the filter plug. The gap may be about 18 mm, but may range from about 5 mm to about 25 mm.

Preferably, the aerosol-forming substrate contains cut excipient. In this document, "cut filler" is used to refer to a mixture of ground plant material, in particular leaf blade, processed stems and veins, homogenized plant material, for example, made into the form of a sheet using molding or papermaking processes. The cut filler may also contain other cut tobacco, tobacco filler or casing. According to preferred embodiments of the present invention, the cut filler comprises at least 25 percent of the plant leaf blade, more preferably at least 50 percent of the plant leaf blade, even more preferably at least 75 percent of the plant leaf blade, and most preferably at least 90 percent of the leaf blade. plants. Preferably, the plant material is one of tobacco, mint, tea, and clove, however, the present invention is equally applicable to other plant material that has the ability to release substances upon application of heat, which can subsequently form an aerosol.

Preferably, the tobacco plant material comprises a flake of one or more of a flake of light tobacco, dark tobacco, flavored tobacco, and tobacco filler. Light tobacco species are tobacco species usually with large, light-colored leaves. Throughout this specification, the term "light tobacco" is used for tobaccos that have been fire-cured. Examples of light tobaccos are Chinese flue-cured tobacco, Brazilian flue-cured tobacco, American flue-cured tobacco such as Virginia tobacco, Indian flue-cured tobacco, Tanzania flue-cured tobacco or other African flue-cured tobaccos. Light tobacco is characterized by a high ratio of sugar and nitrogen. From an organoleptic point of view, light tobacco is a type of tobacco that, after drying, is associated with a spicy and full-bodied sensation. According to the present invention, light tobaccos are tobaccos with a reducing sugar content of from about 2.5 percent to about 20 percent, based on the dry weight of the leaf, and a total ammonia content of less than about 0.12 percent, based on the dry weight. sheet. Reducing sugars contain, for example, glucose or fructose. The total ammonia content is, for example, ammonia and ammonia salts. Dark tobacco species are tobacco species usually with large, dark-colored leaves. Throughout the description, the term "dark tobacco" is used for types of tobacco that have been subjected to air drying. Additionally, dark tobaccos can be fermented. Types of tobacco used mainly for chewing, sniffing, cigars and pipe blends are also included in this category. Typically, these dark tobaccos are air-dried and possibly fermented. From an organoleptic point of view, dark tobacco is a type of tobacco which, after drying, is associated with the smoky feel of dark cigars. Dark tobacco is characterized by a low ratio of sugar and nitrogen. Examples of dark tobaccos are Burley Malawi or other types of African Burley, dark dried Brazilian Galpao, Indonesian sun-dried or air-dried Kasturi. According to the present invention, dark tobaccos are tobaccos with a reducing sugar content of less than about 5 percent based on the dry weight of the leaf and a total ammonia content of not more than about 0.5 percent based on the dry weight of the leaf. Flavored tobaccos are tobaccos that often have small, light-colored leaves. Throughout the description, the term "aromatic tobacco" is used in relation to other types of tobacco, which are characterized by a high content of aromatic substances, such as essential oils. From an organoleptic point of view, aromatic tobacco is a type of tobacco which, after drying, is associated with a spicy and aromatic sensation. Examples of aromatic tobacco types are Oriental Greek, Oriental Turkish, Semi-Oriental tobacco, but also fire-cured tobacco, American Burley, such as Perique, Makhorka, American Burley or Maryland. Tobacco filler is not a specific type of tobacco, but includes types of tobacco that are primarily used to supplement other types of tobacco used in a blend and that do not impart a particular characteristic flavor property to the final product. Examples of tobacco fillers are stems, midribs or stems of other types of tobacco. A concrete example is fire-cured stems from the lower petioles of a Brazilian fire-cured tobacco species.

The cut filler suitable for use in the present invention may generally resemble the cut filler used for conventional smoking articles. The cutting width of the cut filler is preferably 0.3 mm to 2.0 mm, more preferably the cut width of the cut filler is 0.5 mm to 1.2 mm, and most preferably the cut width of the cut filler is 0.6 mm to 0 .9 mm. The width of the cut may play a role in the distribution of heat within the substrate portion of the article. In addition, the width of the cut can play a role in the drag resistance of the product. In addition, the width of the cut can affect the overall density of the portion as a substrate.

The length of the threads of the cut filler is somewhat random, as the length of the threads will depend on the overall size of the object from which the thread is cut. However, by maintaining appropriate conditions for the material prior to cutting, such as controlling the moisture content and overall fineness of the material, longer strands can be cut. Preferably, the filaments are from about 10 millimeters to about 40 millimeters long before the filaments are formed into a section of the substrate. Obviously, if the filaments are located in a section of the substrate in a longitudinal extent, where the longitudinal extent of the section is less than 40 millimeters, the final section of the substrate may contain filaments that are shorter on average than the length of the original thread. Preferably, the length of the threads of the cut filler is such that from about 20 percent to 60 percent of the threads run the entire length of the substrate portion. This prevents the filaments from easily separating from the substrate section. Alternatively or additionally, the length of the thread may be controlled by the cutting process.

In preferred embodiments, the weight of the aerosol forming substrate is from 59 milligrams to 190 milligrams, preferably from 70 milligrams to 170 milligrams, more preferably from 115 milligrams to 155 milligrams, most preferably about 132 milligrams. This amount of aerosol-forming substrate will generally produce enough material to form an aerosol. In addition, in light of the aforementioned diameter and size limitations, this provides a balanced density of the aerosol forming substrate between energy absorption, draw resistance and fluid passages in the substrate section where the substrate contains plant material.

The aerosol-forming substrate may be impregnated with an aerosol-forming agent. Impregnation of the aerosol-forming substrate may be accomplished by spraying or other suitable application methods. The aerosolizing agent may be added to the mixture when preparing the cut filler. For example, an aerosolizing agent may be added to the mixture in a direct-conditioning-casing cylinder (DCCC). Conventional equipment may be used to add the aerosolizing agent to the cut filler. The aerosol generating agent can be any suitable known compound or mixture of compounds which, when used, produces a dense and stable aerosol. The aerosol generating agent may provide the aerosol with substantially resistance to thermal degradation at the temperatures commonly used in the use of the aerosol generating article. Suitable aerosol forming agents are, for example: polyhydric alcohols such as, for example, triethylene glycol, 1,3-butanediol, propylene glycol and glycerin; esters of polyhydric alcohols such as, for example, glycerol mono-, di- or triacetate; aliphatic esters of mono-, di- or polycarboxylic acids, such as, for example, dimethyl dodecanedioate and dimethyl tetradecanedioate; and their combinations.

Preferably, the aerosol forming agent contains one or more of glycerol and propylene glycol. The aerosol forming agent may be composed of glycerin or propylene glycol, or a combination of glycerin and propylene glycol.

Preferably, the amount of aerosolizing agent is from 6 percent to 20 percent by weight, based on the dry weight of the aerosol-forming substrate, more preferably, the amount of aerosolizing agent is from 8 percent to 18 percent, by weight, based on the dry weight of the aerosol-generating substrate. , most preferably the amount of aerosol-forming agent is from 10 percent to 15 percent by weight based on the dry weight of the aerosol-forming substrate. In some embodiments, the amount of aerosolizing agent has a target value of about 13 percent by weight based on the dry weight of the aerosolizing substrate. The most effective amount of aerosol generating agent will also depend on the aerosol-forming substrate, whether the aerosol-forming substrate contains plant lamina or homogenized plant material. For example, among other factors, the type of substrate will determine the extent to which the aerosol generating agent can promote the release of substances from the aerosol generating substrate.

For these reasons, the aerosol generating substrate according to the present invention can efficiently generate sufficient aerosol at relatively low temperatures. A temperature of 150 degrees Celsius to 220 degrees Celsius in the heating chamber may be sufficient for the aerosol forming substrate to generate sufficient amounts of aerosol.

Alternatively or additionally, the aerosol-forming substrate may be impregnated with an aerosol-forming agent. Providing homogenized tobacco material can improve aerosol generation, nicotine content, and flavor profile of the aerosol generated by heating the aerosol generating article. In particular, the process for making homogenized tobacco may include grinding one or more of the botanical, tobacco leaf, tobacco root, tobacco flower, and tobacco seeds to more effectively release nicotine and flavors upon heating.

The homogenized tobacco material is preferably provided in the form of sheets which are one of the following: folded, corrugated or cut into strips. In a particularly preferred embodiment, the sheets are cut into strips having a width of from about 0.2 millimeters to about 2 millimeters, more preferably from about 0.4 millimeters to about 1.2 millimeters. In one embodiment, the width of the strips is approximately 0.9 millimeters.

Alternatively, the homogenized tobacco material can be formed into spheres using spheronization. The average diameter of the spheres is preferably from about 0.5 millimeters to about 4 millimeters, more preferably from about 0.8 millimeters to about 3 millimeters.

The aerosol generating substrate preferably contains: homogenized tobacco material in an amount of from about 55 percent to about 75 percent by weight, an aerosolizing agent in an amount of from about 15 percent to about 25 percent by weight; and water in an amount of from about 10 percent to about 20 percent by weight.

Aerosol-forming substrate samples are equilibrated for 48 hours at 50 percent relative humidity at 22 degrees Celsius before being measured. The Karl Fischer method is used to determine the water content of the homogenized tobacco material.

The aerosol-forming substrate may further comprise a fragrance in an amount of from about 0.1 percent to about 10 percent by weight. The flavor may be any suitable flavor known in the art, such as menthol.

Sheets of homogenized tobacco material for use in capsule-containing aerosol generating articles can be made by agglomerating tobacco particles obtained by grinding or otherwise grinding one or both of the tobacco leaf lamellas and/or tobacco leaf stems.

Sheets of homogenized tobacco material for use in capsule-containing aerosol generating products may contain one or more intrinsic binders, i.e. tobacco endogenous binder, one or more external binders, i.e. tobacco exogenous binder, or a combination thereof, to promote agglomeration of tobacco particles. . Alternatively or additionally, the sheets of homogenized tobacco material may contain other additives, including, but not limited to, tobacco and non-tobacco fibers, flavors, fillers, aqueous and non-aqueous solvents, and combinations thereof.

Suitable external binders for inclusion in sheets of homogenized tobacco material for use in aerosol generating products containing a capsule are known in the art and include, but are not limited to: gums such as, for example, guar gum, xanthan gum, gum arabic and gum carob; cellulosic binders such as, for example, hydroxypropylcellulose, carboxymethylcellulose, hydroxyethylcellulose, methylcellulose and ethylcellulose; polysaccharides such as, for example, starches; organic acids such as alginic acid; base salts conjugated with organic acids such as sodium alginate, agar and 30 pectins; and their combinations.

A number of reconstitution processes are known in the art for producing sheets of homogenized tobacco materials. These include, but are not limited to, papermaking processes of the type described, for example, in US-A-3860012; forming or "sheet forming" processes of the type described, for example, in US Pat. No. 5,724,998; dough recovery processes of the type described, for example, in US Pat. No. 3,894,544; and extrusion processes of the type described, for example, in document GB-A-983928. Generally, the densities of the sheets of homogenized tobacco material produced by the extrusion processes and the dough reduction processes are higher than the densities of the sheets of homogenized tobacco materials produced by the molding processes.

Sheets of homogenized tobacco material for use in aerosol generating articles containing a capsule are preferably formed by a molding process of the type typically comprising casting a slurry containing tobacco particles and one or more binders onto a conveyor belt or other support surface, drying the cast slurry to form a homogenized sheet. tobacco material; and removing the sheet of homogenized tobacco material from the support surface.

Homogenized tobacco sheet material can be made using different types of tobacco. For example, the tobacco sheet material may be made using tobacco species from a number of different varieties of tobacco, or tobacco from different locations in the tobacco plant, such as from leaves or stem. After processing, the sheet has proper properties and a homogenized aroma. One sheet of homogenized tobacco material can be made to have a particular flavor. To produce a product having a different flavor, it is necessary to obtain a different tobacco sheet material. Some flavors, which are obtained by mixing a large number of different types of cut tobacco in a conventional cigarette, may be difficult to reproduce in a single homogenized tobacco leaf. For example, Virginia tobaccos and Burley tobaccos may need to be processed in different ways to optimize their individual flavors. It may not be possible to reproduce a particular blend of Virginia tobacco and Burley tobacco in a single sheet of homogenized tobacco material. In such a case, the aerosol forming substrate may comprise a first homogenized tobacco material and a second homogenized tobacco material. By combining two different sheets of tobacco material in the same aerosol forming substrate, new mixtures can be created that could not be obtained from a single sheet of homogenized tobacco.

The aerosolizing agent preferably contains at least one polyhydric alcohol. In a preferred embodiment, the aerosol generating agent comprises at least one of: triethylene glycol; 1,3-butanediol; propylene glycol and glycerin.

The present invention further relates to an aerosol generating system comprising an aerosol generating device as described herein and an aerosol generating article as described herein.

The first seal wrap of the aerosol generating article may be configured to align with the first sealing element of the aerosol generating device when the aerosol generating article can be placed in the cavity of the aerosol generating device. The first seal wrap of the aerosol generating article may be configured to come into contact with the first sealing element of the aerosol generating device when the aerosol generating article is placed in the cavity of the aerosol generating device. The contact between the first sealing wrapper and the first sealing element may be a sealing contact.

The first seal wrap of the aerosol generating article may be configured to align with the second sealing member of the aerosol generating device when the aerosol generating article is fully seated within the cavity of the aerosol generating device. The first sealing wrapper of the aerosol generating article is preferably configured to come into contact with the first sealing member of the aerosol generating device when the aerosol generating article is fully positioned within the cavity of the aerosol generating device.

The second seal wrap of the aerosol generating article may be configured to align with the second sealing element of the aerosol generating device when the aerosol generating article can be placed in the cavity of the aerosol generating device. The second seal wrap of the aerosol generating article may be configured to contact the second sealing element of the aerosol generating device when the aerosol generating article is placed in the cavity of the aerosol generating device. The contact between the second sealing wrapper and the second sealing element may be a sealing contact.

The first seal wrap of the aerosol generating article may be configured to align with the second sealing member of the aerosol generating device when the aerosol generating article is fully seated within the cavity of the aerosol generating device. The second seal wrap of the aerosol generating article is preferably configured to come into contact with the second sealing member of the aerosol generating device when the aerosol generating article is fully seated within the cavity of the aerosol generating device.

The features described in relation to one aspect can be equally applied to other aspects of the present invention.

The present invention will now be described solely by way of example with reference to the accompanying drawings, in which:

in fig. 1A-1C are sectional views of various embodiments of an aerosol generating device according to the present invention;

in fig. 2 shows an embodiment of an aerosol generating device with an aerosol generating article inserted;

in fig. 3A shows an aerosol generating article with seal wraps;

in fig. 3B shows the insertion of the aerosol generating article into the aerosol generating device and the direction of the air flow;

in fig. 4A shows an aerosol generating device and an aerosol generating article not inserted in the device;

in fig. 4B shows the aerosol generating device of FIG. 4A with an aerosol generating article inserted; And

in fig. 5 shows an aerosol generating device and an aerosol generating article housed in the aerosol generating device, the aerosol generating device having a lower member attached to the base of the cavity.

In FIG. 1A shows an aerosol generating device. The aerosol generating device comprises a cavity 10. The cavity 10 is configured to accommodate an aerosol generating article 28 (aerosol generating article 28 is shown in FIGS. 2, 3 and 4). The cavity 10 contains the first sealing element 12. The first sealing element 12 is located adjacent to the upstream end 14 of the cavity 10. Additionally, the second sealing element 16 is located adjacent to the downstream end 18 of the cavity 10.

In FIG. 1A additionally shows a heating element 20. The heating element 20 is configured as an external heating element 20. The heating element 20 at least partially forms a side wall 22 of the cavity 10. In other embodiments, the heating element 20 may be implemented as an internal heating element 20, in the case of whereby the heating element 20 is preferably centrally located in the cavity 10 as a heating pin or heating plate. The heating element 20 may be an electrically resistive heating element 20. Alternatively, the heating element 20 may be an induction heating element 20.

The first sealing element 12 and the second sealing element 16 are located along the side wall 22.

The aerosol generating device may include additional elements, such as a main body containing a power supply and a controller for supplying power to the heating element 20. The aerosol generating device may contain additional elements, such as a button for activating the aerosol generating device, and a sensor puffs to detect puffs.

In FIG. 1A, an air inlet 24 is shown in the base 26 of the aerosol generating device. The air inlet 24 allows air to enter the cavity 10 through the upstream end 14 of the cavity 10. During operation, the user draws air through the aerosol generating device. When a user takes a puff on the aerosol generating article 28 placed in the cavity 10, air is drawn into the cavity 10 through the air inlet 24. The air is then drawn through the aerosol generating article 28 towards the wearer's mouth. The user may puff directly through the aerosol generating article 28 or through the mouthpiece of the aerosol generating device.

In FIG. 1A, the first sealing element 12 is positioned in contact with the heating element 20. The first sealing element 12 preferably comprises or consists of a thermoresistive material to protect the first sealing element 12 from the elevated temperature of the heating element 20. In the embodiment shown in FIG. 1A, the second sealing element 16 is located at a distance from the heating element 20 downstream of the heating element 20. The second sealing element 16 may potentially contain or consist of a material that is not as resistant to elevated temperatures as the first sealing element 12. On fig. 1A, the second sealing element 16 is not in contact with the heating element 20.

However, different arrangements of the sealing elements are possible, as shown in FIG. 1B and 1C. In FIG. 1B, the first sealing element 12 is located at a distance from the heating element 20 upstream of the heating element 20, and the second sealing element 16 is located in contact with the heating element 20. In FIG. 1C, the first sealing element 12 as well as the second sealing element 16 are located at a distance from the heating element 20. In this embodiment, the first sealing element 12 is located upstream of the heating element 20, and the second sealing element 16 is located downstream of the heating element. element 20. It is also possible that both of the sealing elements 12, 16 are in contact with the heating element 20.

One or both of the first sealing element 12 and the second sealing element 16 are preferably O-rings. One or both of the first sealing element 12 and the second sealing element 16 may be located in respective grooves in the side wall 22 of the cavity 10 to prevent axial movement of the sealing elements during insertion and removal of the aerosol generating article 28. The outer diameter of one or both of the first sealing element 12 and the second sealing element 16 may correspond to the inner diameter of the cavity 10 or be slightly larger. The inner diameter of one or both of the first sealing element 12 and the second sealing element 16 may match or be slightly smaller than the outer diameter of the aerosol generating article 28.

When the aerosol generating article 28 is inserted into the cavity 10, the flow of air between the side wall 22 of the cavity 10 and the aerosol generating article 28 is substantially prevented by the first and second sealing elements 12, 16. In this respect, the first sealing element 12 located in the area upstream of side wall 22 of cavity 10 prevents air from entering the gap between aerosol generating article 28 and side wall 22 of cavity 10 when aerosol generating article 28 is placed in cavity 10. Therefore, air initially enters into article 28, generating an aerosol after air enters the cavity 10 through the air inlet 24. The air then moves in a downstream direction as indicated by the arrow in FIG. 2 through the aerosol generating article 28. The second sealing element 16, located in the region downstream of the side wall 22 of the cavity 10, prevents air from the aerosol generating article 28 from escaping into the gap between the side wall 22 of the cavity 10 in the aerosol generating article 28 downstream of the first of the sealing member 12. As a consequence, an airflow is forced through the substrate portion 30 of the aerosol generating article 28.

To further facilitate the flow of air through the aerosol generating article 28, the wrapping paper 32 of the aerosol generating article 28 surrounding the aerosol generating article 28 may be made airtight.

In FIG. 3A shows an embodiment of an aerosol generating article 28 in which the aerosol generating article 28 comprises a first seal wrap 36 and a second seal wrap 38. The first seal wrap 36 and the second seal wrap 38 are provided in addition to the wrapping paper 32 of the aerosol generating article 28. . Wrapping paper 32 may be provided to connect the substrate portion 30 of the aerosol generating article 28 to the filter portion 34 of the aerosol generating article 28. The first sealing wrap 36 of the aerosol generating article 28 is configured to sealably engage with the first sealing member 12 of the aerosol generating device when the aerosol generating article 28 is placed in the cavity 10 of the aerosol generating device. The second sealing wrapper 38 of the aerosol generating article 28 is configured to sealably engage with the second sealing member 16 of the aerosol generating device when the aerosol generating article 28 is placed in the cavity 10 of the aerosol generating device.

One or both of the first seal wrap 36 and the second seal wrap 38 preferably completely surround the outer circumference of the aerosol generating article 28. One or both of the first seal wrap 36 and the second seal wrap 38 preferably increase the outside diameter of the aerosol generating article 28. A consequence of the increased outer diameter of the aerosol generating article 28 is that the aerosol generating article 28 is securely held in the cavity 10 of the aerosol generating device after insertion of the aerosol generating article 28 into the cavity 10. In particular, the tight engagement between the first sealing wrapper 36 and first sealing element 12 and between the second sealing wrapper 38 and second sealing element 16 is facilitated by the increased diameter of the aerosol generating article 28 in the region of the first sealing wrapper 36 and in the region of the second sealing wrapper 38. As shown in FIG. 3B, after the aerosol generating article 28 is inserted into the cavity 10 of the aerosol generating device, the first seal wrap 36 of the aerosol generating article 28 is adjacent to the first sealing member 12 of the aerosol generating device, and the second seal wrap 38 of the aerosol generating article 28, adjoins the second sealing element 16 of the aerosol generating device. As a consequence, the flow of air between the side wall 22 of the cavity 10 and the aerosol generating article 28 is prevented, and the air flow through the aerosol generating article 28 is forcibly passed.

In FIG. 4A shows an embodiment in which the recess 40 is provided adjacent to the upstream end 14 of the cavity 10 of the aerosol generating device. Recess 40 may completely surround cavity 10. Recess 40 may extend in a direction perpendicular to the longitudinal axis of cavity 10. Recess 40 may extend in a direction perpendicular to the longitudinal axis of the aerosol generating device. As can be seen in FIG. 4A, unwanted residue 42 may remain in the cavity 10 after the aerosol generating article 28 is used up and removed from the cavity 10 of the aerosol generating device.

As shown in FIG. 4B, during insertion of the new aerosol generating article 28 into the cavity 10 of the aerosol generating device, unwanted residue 42 is scraped off the side wall 22 of the cavity 10 of the aerosol generating device by the new aerosol generating article 28. In particular, the first seal wrap 36 of the aerosol generating device 28 may have sufficient rigidity to allow unwanted residue 42 to be scraped off the side wall 22 of the aerosol generating device. The first seal wrap 36 may be rigid. After insertion of the aerosol generating article 28 into the cavity 10 of the aerosol generating device, unwanted residues 42 that have been scraped off the side wall 22 of the cavity 10 of the aerosol generating article 28 can be pushed into the recess 40 in the base 26 of the cavity 10. As a consequence, unwanted the residues 42 do not accumulate in the base 26 of the aerosol generating device or along the side wall of the cavity 10 and do not adversely affect the flow of air into the cavity 10 through the air inlet 24.

In FIG. 5 shows an embodiment in which lower member 44 is adjacent to base 26 of cavity 10. In the embodiment shown in FIG. 5, the bottom member 44 is rotatably attached to the aerosol generating device. The lower member 44 may be attached to the aerosol generating device via a hinge 46. The lower member 44 may be opened to provide access to the base 26 of the cavity 10 of the aerosol generating device. In particular, opening the bottom member 44 allows access to the recess 40 to clear unwanted debris 42 from the recess 40. Instead of the bottom member 44 being pivotally attached to the aerosol generating device, in other embodiments, the bottom member 44 may be slidably attached. to an aerosol generating device. If lower member 44 is slidably attached to the aerosol generating device, then lower member 44 is preferably slidable in a direction perpendicular to the longitudinal axis of the aerosol generating device to allow cavity 10 to be opened at the upstream end 14 of cavity 10 For example, the lower slidable member can be retracted along the rails of the device. Lower member 44 may allow cavity 10 to be closed at the upstream end 14 of cavity 10. A user may open lower member 44 after use to remove any unwanted residue 42 from cavity 10 and then close lower member 44.

Claims (22)

1. An aerosol generating device, comprising: a cavity configured to accommodate an aerosol generating article; a first sealing element positioned along a side wall of the cavity and configured to contact a first sealing wrapper of the aerosol generating article, the first sealing element located in an upstream portion of the cavity; a second sealing element configured to contact the second sealing wrapper, the second sealing element being located in a downstream portion of the cavity; power unit; And a heating element, wherein the heating element is an external heating element. 2. An aerosol generating device according to claim 1, characterized in that the first sealing element is positioned such that airflow between the side wall of the cavity and the placed aerosol generating article is prevented in the region of the first sealing element. 3. An aerosol generating device according to any one of the preceding claims, characterized in that one or both of each of the first and second sealing elements is configured to provide an annular seal between the side wall of the cavity and the aerosol generating article when the aerosol generating article placed in the cavity. 4. An aerosol generating device according to any one of the preceding claims, characterized in that one or both of the first and second sealing elements are in the form of sealing rings. 5. An aerosol generating device according to any one of the preceding claims, characterized in that one or both of the sealing elements comprise a heat-resistant material. 6. An aerosol generating device according to any one of the preceding claims, characterized in that the device comprises a recess in the side wall of the cavity adjacent to the base of the cavity. 7. An aerosol generating device according to any one of the preceding claims, characterized in that the device comprises a movable lower element located adjacent to the base of the cavity. 8. An aerosol generating article, comprising: wrapping paper wrapped around the outer circumference of the aerosol generating article; a first sealing wrapper capable of being hermetically engaged with the first sealing element of the aerosol generating device, wherein the first sealing wrapper partially covers the wrapping paper and increases the diameter of the aerosol generating article in the region of the first sealing wrapper, and a second sealing wrapper configured to sealably engage with a second sealing member of the aerosol generating device, wherein the first sealing wrapper is located in an upstream portion of the aerosol generating article and the second sealing wrapper is located in a downstream portion aerosol generating products. 9. An aerosol generating article according to claim 8, characterized in that the wrapping paper is airtight. 10. An aerosol generating system, comprising an aerosol generating device according to any one of paragraphs. 1-7 and an aerosol generating article. 11. An aerosol generating system according to claim 10, characterized in that the aerosol generating product is made according to any one of paragraphs. 8, 9. 12. An aerosol generating system according to claim 11, characterized in that the first sealing wrapper of the aerosol generating article is arranged to come into contact with the first sealing element of the aerosol generating device when the aerosol generating article is placed in the cavity of the device, generating aerosol. 13. An aerosol generating system according to any one of paragraphs. 11 or 12, depending on claim 9, characterized in that the second sealing wrapper of the aerosol generating device is located with the possibility of coming into contact with the second sealing element of the aerosol generating device when the aerosol generating article is placed in the cavity of the aerosol generating device. aerosol.

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