巴西专利BR112020002149A2 aerosol generating device with an elastic susceptor

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专利摘要:
The present invention relates to an aerosol generating device (12) comprising a chamber (20), an induction coil (28) arranged around at least a portion of the chamber (20) and an elastic susceptor element (26) positioned inside the chamber (20). The elastic susceptor element (26) is tubular in shape to receive at least a portion of an aerosol generating article (14) within the elastic susceptor element (26). The aerosol generating device (12) also comprises a power supply (30) and a controller (32) connected to the inductor coil (28) and configured to supply an alternating electrical current to the inductor coil (28), so that, in In use, the inductor coil (28) generates an alternating magnetic field to inductively heat the elastic susceptor element (26) and thereby heat at least a portion of an aerosol generating article (14) received within the elastic susceptor element (26 ).
公开号:BR112020002149A2
申请号:R112020002149-0
申请日:2018-08-09
公开日:2020-08-04
发明作者:Rui Nuno BATISTA
申请人:Philip Morris Products S.A.；
IPC主号:

专利说明:

[1] [1] The present invention relates to an aerosol generating device comprising an induction coil and an elastic susceptor element. The present invention also relates to an aerosol generating system comprising the aerosol generating device and an aerosol generating article for use with the aerosol generating device.
[2] [2] A variety of aerosol generating systems in which an aerosol generating device with an electric heater is used to heat an aerosol-forming substrate, such as a tobacco plug, have been proposed in the art. One objective of such aerosol generating systems is to reduce the known harmful smoke constituents of the type produced by the combustion and pyrolytic degradation of tobacco in conventional cigarettes. Typically, the aerosol generating substrate is supplied as part of an aerosol generating article that is inserted into a chamber or cavity in the aerosol generating device. In some known systems, to heat the aerosol-forming substrate to a temperature at which it is capable of releasing volatile components that can form an aerosol, a resistive heating element such as a heating blade is inserted into or around the substrate-forming substrate. aerosol when the article is received in the aerosol generating device. In other aerosol generating systems, an inductive heater is used instead of a resistive heating element. The inductive heater comprises an inductor forming part of the aerosol generating device and an electrically conductive susceptor element within the aerosol generating device and arranged in such a way that it is in thermal proximity to the aerosol forming substrate. While being used, the inductor generates an alternating magnetic field to generate eddy currents and hysteresis losses in the susceptor element, causing the susceptor element to heat up, thus heating the aerosol-forming substrate.
[3] [3] Current inventors have recognized that, in order to optimize the heating of an aerosol-generating article in an inductive heating system, the system is preferably configured to optimize the contact between the article and the susceptor element and minimize the dis - distance between the inductor and the susceptor element. However, in known devices this can result in a tight fit of the aerosol generating article within the device. This can make it difficult for a user to insert an article into the device, remove an article from the device, or both. Tight fit can also reduce manufacturing tolerances in relation to article dimensions, which can increase the cost of the article.
[4] [4] It would be desirable to provide an aerosol generating device that comprises an inductive heating system that mitigates or overcomes these problems with known systems.
[5] [5] According to a first aspect of the present invention, an aerosol generating device is provided which comprises a chamber, an induction coil arranged around at least a portion of the chamber, and an elastic susceptor element positioned within the chamber . The elastic susceptor element is tubular in shape to receive at least a portion of an aerosol generating article within the elastic susceptor element. The aerosol generating device also comprises a power supply and a controller connected to the inductor coil and configured to supply an alternating electric current to the inductor coil, so that, in use, the inductor coil generates an alternating magnetic field to heat inductive coil. - the elastic susceptor element, and thus heat at least a portion of an aerosol generating article received within the elastic susceptor element.
[6] [6] As used in this document, the term "longitudinal" is used to describe the direction along the main axis of the aerosol generating device or an aerosol generating article and the term "transverse" is used to describe the direction perpendicular to the longitudinal direction. When referring to the chamber and the elastic susceptor element, the term 'longitudinal' refers to the direction in which an aerosol generating article is inserted into the elastic susceptor element and the term 'transverse' refers to a direction perpendicular to the direction in which an aerosol generating article is inserted into the elastic susceptor element.
[7] [7] As used in this document, the term "width" refers to the main dimension in a transverse direction of a component of the aerosol generating device or an aerosol generating article, at a specific location along its length. The term "thickness" refers to the dimension of a component of the aerosol generating device or an aerosol generating article, and a transverse direction perpendicular to the width.
[8] [8] As used in this document, the term "aerosol-forming substrate" refers to a substrate capable of releasing volatile compounds that can form an aerosol. Such volatile compounds can be released by heating the aerosol-forming substrate. An aerosol-forming substrate is part of an aerosol-generating article.
[9] [9] As used in this document, the term “aerosol-generating article” is used to denote an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol. For example, an aerosol generating article may be an article that generates an aerosol that is directly inhaled by the user by swallowing or blowing into a mouthpiece at a proximal or user end of the system. An aerosol-generating article may be disposable. An article comprising an aerosol-forming substrate containing tobacco is called a tobacco stick.
[10] [10] As used in this document, the term "aerosol generating device" refers to a device that interacts with an aerosol generating article to generate an aerosol.
[11] [11] As used in this document, the term "aerosol generating system" refers to the combination of an aerosol generating article, as described and illustrated in more detail in this document, with an aerosol generating device, as described and illustrated in this document in more detail. In an aerosol generating system, the aerosol generating article and the aerosol generating device cooperate to generate a breathable aerosol.
[12] [12] As used in this document, the term "elongated" refers to a component with a length greater than its width and thickness, for example, twice as long.
[13] [13] As used in this document, a "susceptor element" means an electrically conductive element that heats up when subjected to a change in the magnetic field. This may be the result of eddy currents induced in the susceptor element, or both eddy currents and hysteresis losses. The susceptor element is located in thermal contact or thermal proximity with the aerosol forming substrate of an aerosol generating article received in the elastic susceptible element of the aerosol generating device. In this way, the aerosol-forming substrate is heated by the susceptor element during use so that an aerosol is formed.
[14] [14] Advantageously, providing an induction coil and a susceptor element as parts of the aerosol generating device makes it possible to construct an aerosol generating article that is simple, inexpensive and robust. Aerosol generating articles are typically disposable and produced in much larger numbers than the aerosol generating devices with which they work. Consequently, reducing the cost of articles, even if it requires a more expensive device, can generate significant savings for manufacturers and consumers.
[15] [15] Advantageously, the use of inductive heating instead of resistive heating can provide an improved energy conversion due to the energy losses associated with a resistive heater, in particular, due to contact resistance in connections between the resistive heater and the power supply.
[16] [16] Advantageously, providing the aerosol generating device with the elastic susceptor element can allow the susceptor element to conform to an outer size and shape of an aerosol generating article received within the susceptor element. For example, the elastic susceptor element may stretch or deform to accommodate the size and shape of the aerosol generating article. This can advantageously optimize the contact between the susceptor element and the aerosol generating article. This can advantageously optimize the heat transfer from the susceptor element to the aerosol generating article during use. Advantageously, the elastic susceptor element can retain these advantages while also accommodating aerosol generating articles with different shapes, sizes or both. This can advantageously facilitate the use of the aerosol generating device with more than one type of aerosol generating article.
[17] [17] Advantageously, configuring the elastic susceptor element to receive at least a portion of an aerosol generating article within the elastic susceptor element can reduce or minimize a distance between the susceptor element and the inductor. For example, receiving an aerosol-generating article within the elastic susceptor element positions the susceptor element around an exterior of the
[18] [18] Advantageously, the elastic susceptor element can facilitate the insertion of an aerosol generating article in the aerosol generating device. For example, the susceptor element may stretch or deform when an aerosol generating article is inserted into the aerosol generating device. This can reduce the force required to insert the aerosol generating article into the aerosol generating device.
[19] [19] Advantageously, the elasticity of the elastic susceptor element can facilitate the retention of the aerosol generating article within the aerosol generating device during use. For example, the susceptor element may stretch or deform when an aerosol generating article is inserted into the aerosol generating device. This can result in the elasticity of the susceptor element exerting a force on the aerosol generating article while the article is received within the aerosol generating device.
[20] [20] Advantageously, the elasticity of the elastic susceptor element can maintain contact between the elastic susceptor element and an aerosol generating article during use. For example, some aerosol-generating articles, such as those comprising a tobacco plug, may exhibit shrinkage during heating and consumption of the aerosol-generating article. Therefore, when the susceptor element stretches or deforms when the aerosol generating article is inserted into the aerosol generating device, elasticity can result in the contraction of the elastic susceptor element around the aerosol generating article according to the aerosol generating article. aerosol shrinks.
[21] [21] Advantageously, the elasticity combined with the tubular shape of the elastic susceptor element can facilitate the correct positioning of an aerosol generating article within the chamber. In particular, the susceptor element can facilitate the positioning of an aerosol generating article along a central axis of the chamber. For example, positioning an aerosol generating article in the chamber, so that it is separated from the central axis or inclined to the central axis, or both, can cause the asymmetric stretching of the tubular susceptible element. Asymmetric stretching can result in the elastic force exerted on the aerosol generating article by the elastic susceptor element being distributed asymmetrically around the aerosol generating article. This can provide a net force on the aerosol generating article that tilts the aerosol generating article towards the central axis of the chamber.
[22] [22] The tubular elastic susceptor element can have any suitable transverse shape. The transverse shape can comprise at least one of circular, elliptical, triangular, rectangular, including square, or any other polygonal shape. Preferably, the tubular elastic susceptor element comprises at least one of a circular or elliptical cross shape. Preferably, the tubular elastic susceptor element has a substantially circular transverse shape. The tubular elastic susceptor element may have a transverse shape that varies in at least one of the area and shape over a length of the elastic susceptor element.
[23] [23] Preferably, the elastic susceptor element is arranged coaxially within the chamber. Preferably, the chamber comprises a central axis, in which the elastic susceptor is arranged symmetrically about the central axis.
[24] [24] The chamber may comprise a closed end, an open end and a central axis that extends between the closed end and the open end. In use, an aerosol generating article can be inserted into the aerosol generating device through the open end of the chamber and in a direction along the central axis.
[25] [25] Preferably, at least a portion of the elastic susceptor element comprises radial elasticity to tilt the susceptor element away from an inner surface of the chamber and towards the central axis. Advantageously, the radial elasticity can incline the elastic susceptor element against an external surface of an aerosol generating article received within the elastic susceptor element.
[26] [26] The elastic susceptor element may comprise a tubular substrate and a susceptible material supported by the tubular substrate. Advantageously, a material that forms the tubular substrate can be optimized to provide at least one of the mechanical strength of the elastic susceptible element and the elasticity of the elastic susceptible element. Advantageously, the susceptor material can be optimized for inductive heating by the inductor.
[27] [27] Preferably, the tubular substrate comprises woven material. Advantageously, a woven material can provide improved control over the elasticity of the elastic susceptible element. For example, the woven material can be formed of fibers with inherent elasticity. Additionally or alternatively, the woven material may comprise a web that provides a degree of elasticity to the tubular structure. Advantageously, the weft of the woven material can be selected to provide the tubular structure with a directional elasticity. For example, the weft can be selected so that the tubular structure has a greater stretch in a radial direction of the tubular structure than a longitudinal direction of the tubular structure.
[28] [28] Preferably, at least a portion of the woven material is porous. Advantageously, one or more porous portions can facilitate the flow of air through the woven material. That is, the one or more porous portions may be permeable. This can advantageously facilitate the flow of air through the aerosol generating device during use. The woven material can be substantially entirely porous.
[29] [29] In embodiments where the chamber comprises a closed end and an open end, a thread count of the woven material may vary over a length of the tubular substrate between the closed end and the open end.
[30] [30] Advantageously, the variation in the wire can provide the tubular structure with a variable elasticity along its length. The portions of the tubular structure with a higher thread count may exert greater elastic force against an aerosol generating article received within the aerosol generating device. The woven material may comprise a first region adjacent to the open end of the chamber and have a first yarn count, and a second region between the first region and the closed end of the chamber, wherein the second region has a second yarn count which is higher than the first yarn count. Advantageously, the lower yarn count in the first region can facilitate the insertion of an aerosol generating article in the aerosol generating device.
[31] [31] Advantageously, the variation in the wire can provide the tubular structure with a variable permeability along its length. Portions of the tubular structure with a lower yarn count may exhibit higher permeability. Advantageously, the portions of the tubular structure that exhibit higher permeability can facilitate the flow of air through the tubular structure.
[32] [32] In embodiments where the tubular structure comprises a first region with a first yarn count and a second region with a second yarn count, the tubular structure may additionally comprise a third region adjacent to the closed end of the chamber and have a third yarn count, where the second region is positioned between the first and second regions, and where the second yarn count is higher than the first yarn count and the third yarn count. Advantageously, the first and third regions can facilitate the flow of air through the tubular structure at the open and closed ends of the chamber.
[33] [33] The fibers to form the woven material may include polymeric fibers, silica fibers, carbon fibers and combinations thereof. An exemplary woven material comprises a graphene-based fabric formed from woven graphene microwaves.
[34] [34] The susceptor material may comprise a material deposited on a surface of the tubular structure.
[35] [35] In embodiments where the tubular structure comprises a woven material, preferably the susceptor material comprises a plurality of susceptor fibers interlaced with the woven material of the tubular substrate.
[36] [36] Suitable susceptible materials include any material that can be heated inductively to a temperature sufficient to generate an aerosol from an aerosol-forming substrate. Suitable susceptible materials include graphite, molybdenum, silicon carbide, stainless steels, niobium and aluminum. Preferred susceptible materials comprise a metal or carbon. Preferably, the susceptor material comprises or consists of a ferromagnetic material, for example, ferritic iron, a ferromagnetic alloy such as ferromagnetic steel or stainless steel, ferromagnetic particles and ferrite. A suitable susceptor material can be or comprise aluminum. The susceptor material preferably comprises more than about 5 percent, preferably more than about 20 percent, more preferably more than about 50 percent or more than about 90 percent of ferromagnetic or paramagnetic materials. The preferred susceptible materials can be heated to a temperature above about 250 degrees Celsius.
[37] [37] The susceptor material can extend over substantially the entire tubular structure.
[38] [38] The susceptor material can extend over only one or more portions of the tubular structure. This can advantageously provide a desired heating profile throughout the chamber during use. Preferably, the susceptor material is positioned in the tubular structure so that the susceptor material overlaps an aerosol-forming substrate of an aerosol-generating article when the article is received within the aerosol-generating device.
[39] [39] In the modalities in which the tubular structure comprises a region with a higher thread count than one or more other regions of the tubular structure, preferably the supporting material is positioned in the region with the highest thread count. In the modalities in which the tubular structure comprises at least the first and second regions with the first and second thread counts, preferably, the susceptor material is positioned in the second region.
[40] [40] The susceptor material can be supplied in the tubular structure as one or more discrete areas of the susceptor material. The susceptor material can comprise a plurality of areas of susceptor material, each supported by a portion of the tubular substrate, wherein the areas of the susceptor material are separated from each other. In the modalities in which the chamber comprises a closed end and an open end, preferably the areas of the susceptible material are separated from each other along a length of the tubular substrate between the closed end and the end open.
[41] [41] The inductor coil may comprise a plurality of inductor coils, where the elastic susceptor element comprises a total number of areas of the susceptor material, and where each inductor coil is arranged about less than the total number areas of susceptible material. Preferably, each inductor coil is arranged around only one area of the susceptor material.
[42] [42] Preferably, the susceptor material forms a first strip of susceptor material that extends around a first portion of the tubular structure. The susceptor material may comprise a second strand of susceptible material that extends around a second portion of the tubular structure, wherein the first and second strips of susceptible material are separated from each other along a length of the tubular structure.
[43] [43] The inductor coil can extend around the first and second strips of susceptible material. This can advantageously facilitate the simultaneous heating of two separate portions of an aerosol generating article received within the aerosol generating device. This can be particularly advantageous in the modalities in which the aerosol generating article comprises two discrete aerosol forming substrates, for example.
[44] [44] The inductor coil can be a first inductor coil arranged around a first portion of the chamber and extending around the first strip of susceptible material. The aerosol generating device may additionally comprise a second induction coil disposed around a second portion of the chamber and extending around the second strip of susceptible material. This can advantageously facilitate the sequential heating of the two discrete aerosol-forming substrates in an aerosol-generating article, or the sequential heating of two portions of a single aerosol-forming substrate.
[45] [45] In modes comprising the first and second inductive coils, the controller can be configured to supply an alternating electrical current to the first coil for a first period of time and configured to supply an alternating electrical current to the second inductive coil. for a second period of time. The first and second time periods can partially overlap. The first and second time periods may not be overlapping.
[46] [46] The aerosol generating device may comprise a tubular compartment piece. Preferably, the tubular casing defines the chamber at least partially. The compartment may comprise an outer compartment and the tubular compartment part positioned within the outer compartment. Preferably, the inductor coil is arranged between the tubular part and the outer compartment. Preferably, the induction coil is wound around an external surface of the tubular compartment part. Advantageously, forming the compartment of a piece of tubular compartment and an outer compartment can facilitate the assembly of the aerosol generating device. For example, the inductor coil can be wrapped around the tubular compartment part before the tubular compartment part and the inductor coil can be inserted as a single element in the outer compartment.
[47] [47] Preferably, the elastic susceptor element comprises a central portion positioned within the tubular compartment part, a first end portion extending outwardly from a first end of the tubular compartment part, and a second end portion which extends out of a second end of the tubular housing part. Preferably, the first end portion of the elastic susceptor element is folded around the first end of the tubular compartment part to an external surface of the tubular compartment part.
[48] [48] Advantageously, the tubular compartment piece supports the set of elastic susceptors within the aerosol generating device.
[49] [49] Advantageously, this arrangement can simplify the assembly of the aerosol generating device. For example, the elastic susceptor element can be inserted into the tubular compartment part and the first and second end portions of the susceptor element can be folded back and secured to the outer surface of the tubular compartment part. This step can form a set of susceptors comprising the elastic susceptor element and the tubular compartment part. Advantageously, the set of susceptors can be easily combined with other elements of the aerosol generating device. For example, in embodiments where the compartment comprises an outer compartment, the set of susceptors can be inserted into the outer compartment.
[50] [50] In the modalities in which the chamber comprises a closed end, the closed end of the chamber can be substantially flat.
[51] [51] Preferably, the aerosol generating device comprises at least one of a recess and a projection at the closed end of the chamber. Advantageously, the recess, the projection, or both, can interact with an aerosol generating article inserted in the aerosol generating device to locate the aerosol generating article in a desired position within the chamber. Preferably, the recess, the projection, or both, interact with the aerosol generating article to position the article along a central axis of the chamber.
[52] [52] Preferably, the aerosol generating device comprises a projection that extends into the chamber from the closed end. The projection can be forced by the compartment. The projection can be configured to confine one end of an aerosol generating article inserted in the aerosol generating device. The projection can be configured for insertion into an aerosol generating article inserted into the aerosol generating device. The projection can comprise at least one of a pin, a column, a blade or a plate.
[53] [53] The projection may comprise a susceptible material. Preferably, at least a portion of the induction coil is arranged around at least a portion of the projection. Advantageously, during use, the induction coil inductively heats the projection comprising a susceptible material. This can advantageously provide additional heating of an aerosol forming substrate from an aerosol generating article received within the aerosol generating device. This can be particularly advantageous in the modalities in which the projection is configured for insertion into an aerosol generating article inserted in the aerosol generating device.
[54] [54] Suitable susceptible materials to form the projection include graphite, molybdenum, silicon carbide, stainless steel, nitrogen and aluminum. Preferred susceptible materials comprise a metal or carbon. Preferably, the susceptible material comprises or consists of a ferromagnetic material, for example, ferritic iron, a ferromagnetic alloy such as ferromagnetic steel or stainless steel, ferromagnetic particles and ferrite. A suitable susceptor material can be or comprise aluminum. The susceptor material preferably comprises more than about 5 percent, preferably more than about 20 percent, more preferably more than about 50 percent or more than about 90 percent of ferromagnetic or paramagnetic materials. Preferred susceptible materials can be heated to a temperature above 250 degrees Celsius.
[55] [55] The projection may comprise a non-metallic core with a metal layer arranged on the non-metallic core. For example, the projection may comprise one or more metal strips formed on an outer surface of a ceramic core or substrate.
[56] [56] The projection may have a protective outer layer, for example, a protective ceramic layer or protective glass layer. The protective outer layer can encapsulate the susceptible material. The projection may comprise a protective coating formed of glass, ceramic or an inert metal, formed under a core of susceptible material.
[57] [57] The projection can have any suitable cross section. For example, the projection can have a square, oval, rectangular, triangular, pentagonal, hexagonal shape, or similar transversal shape. The projection can have a planar or flat transverse area.
[58] [58] The projection can be solid, hollow or porous. Preferably, the projection is solid.
[59] [59] Preferably, the projection is between about 5 millimeters and about 15 millimeters long, for example, between about 6 millimeters and about 12 millimeters or between about 8 millimeters and about 10 millimeters. The projection preferably has a width between about 1 millimeter and about 8 millimeters, more preferably from about 3 millimeters to about 5 millimeters. The projection can have a thickness of about 0.01mm to about 2mm. If the projection has a constant cross section, for example, a circular cross section, it will have a preferred width or diameter between about 1 millimeter and about 5 millimeters.
[60] [60] Preferably, the aerosol generating device is portable.
[61] [61] The aerosol generating device compartment can be stretched. The compartment can comprise any suitable material or combination of materials. Examples of suitable materials include metals, alloys, plastics or composite materials that contain one or more of those materials, or thermoplastics that are suitable for pharmaceutical or food applications, for example, polypropylene, polyetheretherketone (PEEK) and polyethylene. Preferably, the material is light and is not fragile.
[62] [62] The compartment can comprise a nozzle. The nozzle may comprise at least one air inlet and at least one air outlet. The nozzle can comprise more than one air inlet. One or more of the air intakes can reduce the temperature of the aerosol before it is transmitted to a user and can reduce the concentration of the aerosol before it is transmitted to a user.
[63] [63] Alternatively, the nozzle can be supplied as part of an aerosol generating article.
[64] [64] As used in this document, the term "mouthpiece" refers to a portion of the aerosol generating device that is placed in a user's mouth to directly inhale an aerosol generated by the aerosol generating device of an aerosol generating article. - found in the compartment chamber.
[65] [65] The aerosol generating device may include a user interface to activate the device, for example, a button to start heating the device or screen to indicate a state of the device or the aerosol-forming substrate.
[66] [66] The aerosol generating device comprises a power supply. The power source can be a battery, such as a rechargeable lithium-ion battery. Alternatively, the power supply may be another form of charge storage device, such as a capacitor. The power supply may need to be recharged. The power supply may have a capacity that allows sufficient energy storage for one or more uses of the device. For example, the power supply may have sufficient capacity to allow continuous aerosol generation over a period of about six minutes, corresponding to the typical time spent smoking a conventional cigarette or for a period that is a multiple of six minutes. In another example, the power supply may have sufficient capacity to allow a predetermined number of puffs or discreet activations.
[67] [67] The power supply can be a DC power supply. In one embodiment, the power supply is a DC power source with a DC supply voltage in the range of about 2.5 Volts to about 4.5 Volts and a DC supply current in the range of about 1 Ampere at about 10 Amperes (corresponding to the DC power supply in the range of about 2.5 Watts to about 45 Watts).
[68] [68] The power supply can be configured to operate at high frequency. As used in this document, the term "high frequency oscillating current" means an oscillating current with a frequency of between about 500 kilo-hertz and about 30 mega-hertz. The high frequency oscillating current can have a frequency of between about 1 mega-hertz and about 30 mega-hertz, preferably between about 1 mega-hertz and about 10 mega-hertz and more preferably between about 5 mega-hertz and about 8 mega-hertz.
[69] [69] The aerosol generating device comprises a controller connected to the induction coil and the power supply. The controller is configured to control the power supply to the inductor coil of the power supply. The controller can comprise a microprocessor, which can be a programmable microprocessor, a microcontroller or an application specific integrated chip (ASIC) or other electronic circuits capable of providing control. The controller can comprise other electronic components. The controller can be configured to regulate a current supply to the inductor. The current can be supplied to the induction coil continuously by activating the aerosol generating device or it can be supplied intermittently, as with each drag. The controller can advantageously comprise the DC / AC inverter, which can comprise a Class-D or Class-E power amplifier.
[70] [70] In accordance with a second aspect of the present invention, an aerosol generating system is provided. The aerosol generating system comprises an aerosol generating device according to the first aspect of the present invention, according to any of the modalities described in this document. The aerosol generating system also comprises an aerosol generating article with an aerosol forming substrate and configured for use with the aerosol generating device.
[71] [71] The aerosol-forming substrate may comprise nichtatin. The nicotine-containing aerosol-forming substrate may be a nicotine salt matrix. The aerosol-forming substrate may comprise a plant-based material. The aerosol-forming substrate may comprise tobacco. The aerosol-forming substrate may comprise a tobacco-containing material, including volatile tobacco flavor compounds, which are released from the aerosol-forming substrate upon heating. Alternatively, the aerosol forming substrate may comprise a non-smoking material. The aerosol-forming substrate may comprise a homogenized plant-based material. The aerosol-forming substrate may comprise a homogenized tobacco material. The homogenized tobacco material can be formed by agglomerating the particularized tobacco. In a particularly preferred embodiment, the aerosol-forming substrate comprises a crimped sheet of homogenized tobacco material. As used in this document, the term "crimped sheet" indicates a sheet with several substantially parallel edges or corrugations.
[72] [72] The aerosol forming substrate can comprise at least one aerosol former. An aerosol builder can be any suitable known compound or mixture of compounds that, when in use, facilitate the formation of a dense and stable aerosol and that is substantially resistant to thermal degradation at the operating temperature of the system. Suitable aerosol builders are well known in the art and include, but are not limited to: polyhydric alcohols, such as triethylene glycol, 1,3-butanediol and glycerin; esters of polyhydric alcohols, such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol builders are polyhydric alcohols or mixtures thereof, such as triethylene glycol, 1,3-butanediol. Preferably, the aerosol former is glycerin. When present, the homogenized tobacco material can have an aerosol builder content equal to or greater than 5% by weight in relation to dry weight and, preferably, between about 5% and about 30% by weight in relation to dry weight. The aerosol-forming substrate may comprise other additives and ingredients, such as flavorings.
[73] [73] In any of the above embodiments, the aerosol generating article and the chamber of the aerosol generating device can be arranged so that the article is partially received within the chamber of the aerosol generating device. The chamber of the aerosol generating device and the aerosol generating article can be arranged so that the article is entirely received within the chamber of the aerosol generating device.
[74] [74] The aerosol-generating article can be substantially cylindrical in shape. The aerosol generating article can be substantially elongated. The aerosol generating article can have a length and a circumference substantially perpendicular to the length. The aerosol forming substrate can be supplied as an aerosol forming segment containing an aerosol forming substrate. The aerosol forming segment can be substantially cylindrical in shape. The aerosol-forming segment can be substantially elongated. The aerosol forming segment can have a length and a circumference substantially perpendicular to the length.
[75] [75] The aerosol-generating article may have a total length of between approximately 30 millimeters and approximately 100 millimeters. In one embodiment, the aerosol-generating article has a total length of approximately 45 millimeters. The aerosol generator article can have an external length between approximately 5 mm and approximately 12 mm. In one embodiment, the aerosol generating article can have an outside diameter of approximately 7.2 millimeters.
[76] [76] The aerosol forming substrate can be supplied as an aerosol forming segment with a length between about 7 mm and about 15 mm. In one embodiment, the aerosol-forming segment can be approximately
[77] [77] The aerosol generating segment preferably has an outer diameter that is approximately equal to the outer diameter of the aerosol generating article. The outside diameter of the aerosol forming segment can be between about 5 millimeters and about 12 millimeters. In one embodiment, the aerosol-forming segment can have an outside diameter of approximately 7.2 millimeters.
[78] [78] The aerosol generating article may comprise a filter plug. The filter plug can be located at the downstream end of the aerosol generating article. The filter plug can be a cellulose acetate filter plug. The filter plug is approximately 7 millimeters long in one embodiment, but can be approximately 5 millimeters to approximately 10 millimeters long.
[79] [79] The aerosol-generating article may comprise an outer paper wrapper. In addition, the aerosol generating article may comprise a separation between the aerosol-forming substrate and the filter plug. The separation can be about 18 millimeters, but it can be in the range of approximately 5 millimeters to approximately 25 millimeters.
[80] [80] According to a third aspect of the present invention, an elastic susceptor element is provided to heat an aerosol generating article, the elastic susceptor element having a tubular shape to receive at least a portion of an aerosol generating article within of the elastic susceptor element. The elastic susceptor element can comprise any of the preferred and optional features described in this document with reference to the first aspect of the present invention.
[81] [81] The invention will be described below, only by way of example, with reference to the attached figures, in which:
[82] [82] Figure 1 shows a cross-sectional view of an aerosol generating system according to any embodiment of the present invention;
[83] [83] Figure 2 shows a cross-sectional view of the aerosol generating system of Figure 1 with the aerosol generating article inserted in the aerosol generating device;
[84] [84] Figure 3 shows a cross-sectional view of the susceptor assembly of the aerosol generating device of Figure 1;
[85] [85] Figure 4 shows a perspective view of the elastic susceptor element of the susceptor assembly of Figure 3;
[86] [86] Figure 5 shows a perspective view of an alternative elastic susceptor element; and
[87] [87] Figure 6 shows an enlarged cross-sectional view of part of the aerosol generating system of Figure 2.
[88] [88] Figures 1 and 2 show cross-sectional views of an aerosol generating system 10 according to an embodiment of the present invention. An aerosol generating system 10 comprises an aerosol generating device 12 and an aerosol generating article 14. Figure 1 shows the aerosol generating article 14 separate from the aerosol generating device 12. Figure 2 shows a portion of the generating article aerosol dispenser 14 inserted in the aerosol generating device 12.
[89] [89] The aerosol generating device 12 comprises a compartment 16 comprising an outer compartment 18. The aerosol generating device 12 also comprises a chamber 20 for receiving a portion of the aerosol generating article 14 through an open end. 21 of chamber 20.
[90] [90] Positioned inside chamber 20 is a receiver assembly 22 comprising a tubular compartment part 24 and an elastic susceptor element 26. When the aerosol generating article 14 is inserted into the aerosol generating device 12, the aerosol generating article 12 aerosol 14 will be received within the elastic susceptor element 26.
[91] [91] The aerosol generating device 12 also comprises an induction coil 28 arranged in the compartment 16 between the outer compartment 18 and the tubular compartment part 24. The inductor coil 28 extends around the chamber 20.
[92] [92] The aerosol generating device 12 further comprises a power supply 30, a controller 32 and a projection 34. The projection 34 extends in chamber 20 from a closed end 23 of chamber 20.
[93] [93] The aerosol generating article 14 comprises an aerosol forming substrate 36 in the form of a tobacco plug and a nozzle 38 comprising a cellulose acetate filter. The aerosol-forming substrate 36 and the nozzle 38 are held together in a separate relationship by an outer shell 40 to define a space 41 between the aerosol-forming substrate 36 and the nozzle 38.
[94] [94] During use, the aerosol generating article 14 is inserted into chamber 20 of the aerosol generating device 12, so that the aerosol-forming substrate 36 is received within the elastic susceptor element 26. When the article aerosol generator 14 is inserted into the elastic susceptor element 26, the elastic susceptor element 26 stretches and deforms to accommodate the external size and shape of the aerosol generating article 14. The elasticity of the elastic susceptor element 26 tilts the susceptor element elastic 26 against the aerosol-forming article 14 to retain the aerosol-forming article 14 within the chamber 20.
[95] [95] The projection 34 involves the aerosol-forming substrate 36 to locate the aerosol-generating article 14 in a desired position within the chamber 20. Specifically, the projection 34 and the elastic susceptor element 26 position the aerosol-generating article 14 along from a central axis 42 of the elastic susceptor element 26, the chamber 20 and the aerosol generating device 12. The projection 34 also separates an end of the aerosol generating article 14 away from the closed end 23 of the chamber 20 to allow flow of air to enter the end of the aerosol generator article 14, as described in this document with reference to Figure 6.
[96] [96] When the aerosol generating article 14 is inserted into chamber 20, controller 32 supplies an alternating electrical current from power source 30 to inductor coil 28 to generate an alternating magnetic field. The alternating magnetic field inductively heats the elastic susceptor element 26, which heats the aerosol forming substrate 36 to generate an aerosol.
[97] [97] Figure 3 shows a cross-sectional view of the susceptor assembly 22. The elastic susceptor element 26 comprises a tubular structure 42 formed of a woven graphene material. The elastic susceptor element 26 also comprises a strip of susceptor material 44 comprising ferromagnetic fibers interlaced with the graphene material woven in a central region of the tubular structure
[98] [98] Figure 4 shows a perspective view of the elastic susceptor element 26 before being combined with the tubular compartment part 24 to form the susceptor assembly 22. The woven graphene material that forms the tubular structure 42 has a thread count that varies along the length of the tubular structure 42.
[99] [99] Variable thread count defines regions 54 of high thread count at the ends of the tubular structure 42. Regions 54 of high thread count can exhibit greater strength and form the first and second ends 46, 50 tubular structure 42 which are folded back and attached to the outer surface of the tubular compartment part 24.
[100] [100] The variable yarn count also defines the low yarn count 56 regions adjacent to each end of the susceptor 44 material range. The low yarn count 56 regions exhibit greater permeability and facilitate airflow through the elastic support element 26, as described in this document with reference to Figure 6.
[101] [101] Figure 5 shows a perspective view of an alternative elastic susceptor element 126. The elastic susceptor element 126 shown in Figure 5 is similar to the elastic susceptor element 26 shown in Figure 4, and similar reference numbers are used to designate parts similar. The elastic susceptor element 126 differs in the configuration of the susceptor material. In particular, the elastic susceptor element 126 comprises a first strip of susceptible material 144 and a second strip of susceptible material 145 apart from the first band of susceptible material 144. Both the first and second strips of susceptible material 144, 145 comprise ferromagnetic fibers intertwined with the woven graphene material that forms the tubular structure 42. A central region 128 of the tubular structure 42 may be a region of low thread count similar to regions 56,
[102] [102] The elastic susceptor element 126 may be suitable for heating an aerosol generating article comprising the first and second aerosol forming substrates. For example, the first strip of susceptor material 144 can be positioned to heat a first aerosol forming substrate and the second strip of susceptor material 145 can be positioned to heat a second aerosol forming substrate. In such embodiments, the inductor coil 28 can extend around both bands of susceptor material 144, 145 inductively heats both bands of susceptor material 144, 145 simultaneously.
[103] [103] The elastic susceptor element 126 may also be suitable for sequentially heating different portions of an aerosol generating article. In such embodiments, the aerosol generating device can be modified to include a first inductor coil that extends around the first band of susceptor material 144 and a second inductor coil that extends around the second band of susceptor material 145. In such embodiments, the controller can supply alternating electrical currents separate from the power supply to the first and second inductor coils for different periods of time.
[104] [104] Figure 6 shows an enlarged cross-sectional view of a portion of the aerosol generating system 10 of Figure 2. In particular, Figure 6 shows the flow of air through the aerosol generating system 10 during use.
[105] [105] When a user relies on the nozzle 38 of the aerosol generating article 14, the air flow 200 is drawn into the chamber 20 of the aerosol generating device 12 at its open end 21. The air flow 200 flows through an first low thread count region 56 of the tubular structure 42 of the elastic susceptible element 26. The air flow 200 then flows through the space 201 between the elastic susceptible element 26 and the tubular compartment part 24, at which point it is heated by the web of susceptor material 44. The air flow 200 then flows through a second low thread count region 56 of the tubular structure 42 and into a space 202 formed within the chamber 20 between the closed end 23 of the chamber 20 and an end of the aerosol generating article 14. The projection 34 maintains the space 202 between the closed end 23 of the chamber 20 and the aerosol generating article 14. Then, the air flow 200 flows to the aerosol-forming substrate 36 of art an aerosol generator code 14, at which point the aerosol generated by the heated aerosol-forming substrate 36 is drawn into the airflow 200. The airflow 200 and the aerosol then flow through space 41 and nozzle 38 to delivery to the user.

权利要求:
Claims (20)
[1]
1. Aerosol generating device characterized by the fact that it comprises: a chamber; an induction coil arranged around at least a portion of the chamber; an elastic susceptor element positioned within the chamber, the elastic susceptor element having a tubular shape to receive at least a portion of an aerosol generating article within the elastic susceptor element; and a power supply and a controller connected to the inductive coil and configured to supply an alternating electrical current to the inductive coil, so that, in use, the inductive coil generates an alternating magnetic field to inductively heat the element elastic susceptor and thereby heat at least a portion of an aerosol generating article received within the elastic susceptor element.
[2]
2. Aerosol generating device according to claim 1, characterized in that the chamber comprises a closed end, an open end and a central axis that extends between the closed end and the open end, and wherein at least a portion of the elastic susceptor element comprises radial elasticity for tilting the elastic susceptor element away from an interior surface of the chamber and towards the central axis.
[3]
Aerosol generating device according to claim 1 or 2, characterized in that the elastic susceptor element comprises a tubular substrate and a susceptor material supported by the tubular substrate.
[4]
4. Aerosol generating device according to claim 3, characterized by the fact that the tubular substrate comprises a woven material.
[5]
5. Aerosol generating device according to claim 4, characterized by the fact that the chamber comprises a closed end and an open end, and in which a thread count of the woven material varies over a length of the tubular substrate between the closed end and the open end.
[6]
An aerosol generating device according to claim 4 or 5, characterized in that the susceptor material comprises a plurality of susceptor interlaced fibers with the woven material of the tubular substrate.
[7]
Aerosol generating device according to any one of claims 3 to 6, characterized in that the susceptor material comprises a plurality of areas of the susceptor material each supported by a portion of the tubular substrate and in which the areas of material susceptor are separated from each other.
[8]
8. Aerosol generating device according to claim 7, characterized in that the chamber comprises a closed end and an open end and in which the areas of susceptible material are separated from one another over a tubular substrate length between the closed end and the open end.
[9]
An aerosol generating device according to claim 8, characterized in that the inductor coil comprises a plurality of inductor coils, in which the elastic susceptor element comprises a total number of areas of the susceptor material and in which each inductor coil is arranged around less than the total number of susceptible material areas.
[10]
10. Aerosol generating device, according to claim 9, characterized by the fact that each inductor coil is arranged around only one of the areas of the susceptor material.
[11]
An aerosol generating device according to any one of the preceding claims, characterized in that it further comprises a tubular compartment part, wherein the elastic susceptor element comprises a central portion positioned within the tubular compartment part, a first end portion extending out of a first end of the tubular compartment part and a second end portion extending out of a second end of the tubular compartment part.
[12]
12. Aerosol generating device, according to claim 11, characterized by the fact that the first end portion of the elastic susceptor element is folded around the first end of the tubular compartment part and attached to a surface. outer portion of the tubular compartment part and wherein the second end portion of the elastic susceptible member is folded around the second end of the tubular compartment part and attached to the outer surface of the tubular compartment part.
[13]
Aerosol generating device according to any one of the preceding claims, characterized in that the chamber comprises a closed end and in which the aerosol generating device further comprises a projection extending into the chamber from the closed end .
[14]
14. Aerosol generating device, according to claim 13, characterized by the fact that at least a portion of the induction coil is arranged around at least a portion of the projection and in which the projection comprises a susceptible material.
[15]
15. Aerosol generating system characterized by the fact that it comprises an aerosol generating device, as defined in any of the preceding claims, and an aerosol generating article with an aerosol forming substrate and configured for use with the aerosol generating device. .
[16]
16. Elastic susceptor element for heating an aerosol generating article, characterized by the fact that the elastic susceptor element has a tubular shape to receive at least a portion of an aerosol generating article within the elastic susceptor element.
[17]
17. Elastic susceptible element according to claim 16, characterized in that the elastic susceptible element comprises a tubular substrate and a susceptible material supported by the tubular substrate.
[18]
18. Elastic susceptor element according to claim 17, characterized in that the tubular substrate comprises a woven material.
[19]
19. Elastic susceptor element according to claim 18, characterized in that the yarn count of the woven material varies over a length of the tubular substrate.
[20]
20. Elastic susceptor element, according to claim 18 or 19, characterized in that the susceptor material comprises a plurality of susceptor interlaced fibers with the woven material of the tubular substrate.

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同族专利:

公开号 | 公开日

KR20200038957A|2020-04-14|

RU2020109862A3|2021-11-18|

US20200367565A1|2020-11-26|

CN110891442A|2020-03-17|

RU2764529C2|2022-01-18|

WO2019030364A1|2019-02-14|

RU2020109862A|2021-09-10|

JP2020529842A|2020-10-15|

EP3664644A1|2020-06-17|

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法律状态:
2021-11-03| B350| Update of information on the portal [chapter 15.35 patent gazette]|

优先权:

申请号 | 申请日 | 专利标题

EP17185597.6|2017-08-09|

EP17185597|2017-08-09|

PCT/EP2018/071708|WO2019030364A1|2017-08-09|2018-08-09|Aerosol-generating device having an elastic susceptor|

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