Device for generating aerosol

Abstract

A device (1) for generating an aerosol. The device (1) comprises: a heating chamber (5) for receiving an article (3), the article comprising an aerosol-forming substrate (30); and a cooling chamber (7) in fluid communication with the heating chamber (5) and a mouthpiece end (1a) of the device (1). The heating chamber (5) comprises an upstream end and a downstream end. The heating chamber (5) comprises a first main boundary surface and a second main boundary surface (5a, 5b). The first main boundary surface and the second main boundary surface (5a, 5b) extend in a facing parallel relationship and define a mainstream axis (P) for fluid to flow through the heating chamber (5). The device (1) is configured so that in use, the fluid flow from the upstream end to the downstream end of the heating chamber (5) is in a direction substantially parallel to the mainstream axis (P). A method for generating an aerosol is also provided.

Description

Technical Field

[0001] The present invention generally relates to a device for generating an aerosol. The present invention also relates to a method of generating an aerosol using such a device. Background Art

[0002] Devices for generating aerosols that heat rather than burn an aerosol-forming substrate have previously been proposed in the art. For example, heated smoking devices that heat tobacco rather than burn it have been proposed. One purpose of such smoking devices is to reduce the generation of undesirable types of smoke constituents produced by the combustion and pyrolytic degradation of tobacco in conventional cigarettes.

[0003] Typically, in a smoking device that heats rather than burns, heat is transferred from a heat source to a physically separated article for forming an aerosol that includes an aerosol-forming substrate or material. The article may be located in, around, or downstream of the heat source. In the process of generating an aerosol by such a smoking device, volatile compounds are released from an aerosol-forming substrate by the heat transferred from the heat source to the aerosol-forming substrate. The volatile compounds are then entrained in the air drawn by the smoking device, thereby generating an aerosol as the released compounds cool and condense. The aerosol is then inhaled by the user of the smoking device.

[0004] A heated smoking device of the above-mentioned type typically comprises a cavity into which an aerosol-forming article is inserted prior to use. The aerosol-forming article comprises an aerosol-forming substrate which is subsequently heated to generate an aerosol. In this way, when the aerosol-forming substrate contained in the aerosol-forming article has been used up, the aerosol-forming article can be replaced by the heated smoking device, thereby constituting a reusable device. The shape and size of the aerosol-forming article typically correspond to the shape and size of a conventional cigarette. Therefore, the aerosol-forming article and the cavity into which it is inserted or insertable into the heated smoking device have a generally cylindrical shape. Typically, the diameter of the aerosol-forming article is about 7.2 mm.

[0005] Aerosol-forming articles of the type described above typically have a wrapper or carrier layer in which the aerosol-forming substrate is retained. A filter material is typically provided at one or both ends of the aerosol-forming article and acts as a plug to retain the aerosol-forming substrate within the article in use and also to filter the aerosol generated by the heated smoking device. In addition, a cooling section (typically comprising a cardboard tube or a hollow acetate tube) is located within the aerosol-forming article between the aerosol-forming substrate and the filter at one end of the article.

[0006] In use, the user inserts the aerosol-forming article into the cavity of the heated smoking device and draws on the free end of the aerosol-forming article (the free end includes a filter material). A heat source within the heated smoking device is activated to transfer thermal energy to the aerosol-forming article, thereby releasing volatile compounds from the aerosol-forming substrate. The user draws air into the heated smoking device by drawing on the aerosol-forming article. The air flows through at least a portion of the device and then flows into and along the length of the aerosol-forming article, passing through the aerosol-forming substrate and drawing the released volatile compounds therefrom. The mixture of the air flow and the volatile compounds then passes through a cooling section, in which the volatile compounds cool and condense into an aerosol. The aerosol then passes through the filter material before being inhaled into the lungs of the user. The wrapping layer or carrier layer acts as a baffle in this process and is used to guide the airflow so that it flows through and along the aerosol-forming article toward the user.

[0007] Heating the aerosol-forming substrate rather than burning the aerosol-forming substrate requires heating the aerosol-forming substrate to a relatively reduced temperature. Therefore, a relatively reduced amount of thermal energy needs to be transferred to the aerosol-forming substrate. The energy saved advantageously reduces the cost of operating the heated smoking device. Furthermore, heating rather than burning the aerosol-forming substrate may result in more efficient use of the substrate, thereby requiring a relatively small amount of substrate, further saving costs.

[0008] It is desirable to provide a device for generating an aerosol that consumes further reduced energy during use. It is desirable to provide a device for generating an aerosol that has improved efficiency in transferring thermal energy to an article for forming an aerosol received therein. It is also desirable to provide a device for generating an aerosol that facilitates the use of an article for forming an aerosol in a form that is relatively inexpensive and / or relatively less complex to manufacture, thereby reducing costs. It is also desirable to provide a device for generating an aerosol that facilitates the use of an article for forming an aerosol from which volatile compounds are more easily and / or efficiently released. Summary of the invention

[0009] A device for generating an aerosol is provided. The device may include a heating chamber for receiving an article for forming an aerosol including an aerosol-forming substrate. The heating chamber may include an upstream end, a downstream end, and a first main boundary surface and a second main boundary surface. The first main boundary surface and the second main boundary surface may extend in a facing parallel relationship and define a mainstream axis for a fluid to flow through the heating chamber. The device may be configured so that in use, the fluid flow from the upstream end to the downstream end of the heating chamber is in a direction substantially parallel to the mainstream axis.

[0010] According to the present invention, a device for generating an aerosol is provided, the device comprising: a heating chamber for receiving an article for forming an aerosol comprising an aerosol-forming substrate; and a cooling chamber, the cooling chamber being fluidly connected to the heating chamber and the mouthpiece end of the device, the heating chamber comprising an upstream end, a downstream end, and a first main boundary surface and a second main boundary surface, the first main boundary surface and the second main boundary surface extending in a facing parallel relationship and defining a mainstream axis of a fluid flowing through the heating chamber, wherein the device is configured so that in use, the fluid flow from the upstream end to the downstream end of the heating chamber is in a direction substantially parallel to the mainstream axis.

[0011] Advantageously, providing a heating chamber having a first major boundary surface and a second major boundary surface extending in a facing parallel relationship allows heat to be transferred relatively more efficiently to an aerosol-forming substrate of an article for forming an aerosol received in the heating chamber. The term "facing parallel relationship" means that the first major boundary surface and the second major boundary surface are opposite to each other in a substantially parallel manner or face each other in a substantially parallel manner. The prior art device defines a generally cylindrical hole for receiving a prior art article therein, wherein the article is used to form an aerosol including an aerosol-forming substrate (which, as described above, also generally has a cylindrical shape). Therefore, in cross-section, the aerosol-forming substrate at the central region of the article is thermally insulated by the aerosol-forming substrate surrounding the central region. In order to heat the substrate to a temperature sufficient for volatilization to occur, sufficient thermal energy is transferred to this central region of the prior art aerosol article, and therefore, relatively more thermal energy needs to be applied closer to its periphery than heating of a region of the aerosol-forming article. In the present invention, providing parallel major boundary surfaces ensures that, for a given volume of substrate, thermal energy has a relatively reduced path to travel into the aerosol-forming substrate of the article to form an aerosol received within the heating chamber. Furthermore, this arrangement of the major boundary surfaces provides a relatively increased surface area to volume ratio (relative to prior art articles for forming aerosols), thereby enabling more efficient heat transfer to the aerosol-forming substrate.

[0012] Advantageously, since the flow from the upstream end to the downstream end of the heating chamber is substantially parallel to the main flow axis, it is advantageously possible to provide an article ( For example , which can be used with the device) is provided with a simpler construction than is usually the case with prior art articles for forming aerosols.

[0013] It is further advantageous to provide a device in which the first and second main boundary surfaces cause the fluid leaving the heating chamber to flow in a direction parallel to the main flow axis, thereby allowing the device to have a simple shape, such as extending substantially along the main flow axis. Devices having such a simple shape can advantageously be manufactured from fewer parts and can therefore be easier to construct and therefore have relatively reduced costs (compared to more complex shapes).

[0014] As used herein, the term "aerosol-forming substrate" is used to describe a substrate that is capable of releasing volatile compounds that can form an aerosol when heated. The aerosol generated from the aerosol-forming substrate described herein may be visible or invisible to the human eye. The aerosol-forming substrate may include a solid, a fluid, or a mixture of a solid and a fluid substrate. In the case where the aerosol-forming substrate is a fluid, it is advantageously retained within the substrate and / or by a covering layer, at least before the aerosol-forming substrate is received in the heating chamber.

[0015] As used herein, the term "and / or" is used to refer to one of two stated options or both of the two stated options. For example, A and / or B is used to refer to one of A and B or both of A and B. In addition, the term "at least one of A and B" falls within the definition of "A and / or B".

[0016] As used herein, the term "aerosol" is used to describe a suspension of relatively small particles in a fluid medium.

[0017] As used herein, the term "heating chamber" is used to denote a space within which an aerosol-forming article comprising an aerosol-forming substrate is received or receivable and heated or heatable. The first major boundary surface and the second major boundary surface at least partially define a periphery of the heating chamber.

[0018] As used herein, the term "major" with respect to the first and second major bounding surfaces requires that the surfaces each comprise a larger surface area of ​​the heating chamber than other surfaces of the heating chamber.

[0019] As used herein, the term "main flow axis" is used to indicate the direction of flow which is the main direction of flow.

[0020] As used herein, the term "upstream end" is used to refer to the end of the heating chamber through which fluid may flow into the heating chamber in use.

[0021] As used herein, the term "downstream end" is used to refer to the end of the heating chamber through which fluid may flow out of the heating chamber in use.

[0022] According to the present invention, there is provided in combination an apparatus for generating an aerosol and an article for forming an aerosol, the apparatus comprising: a heating chamber for receiving the article therein, the heating chamber comprising a first major boundary surface and a second major boundary surface, the first major boundary surface and the second major boundary surface extending in a facing parallel relationship, the article comprising an aerosol-forming substrate and being configured (i.e., in size and / or shape) to contact both the first major boundary surface and the second major boundary surface when it is received in the heating chamber. This combination of the apparatus for generating an aerosol and the article for forming an aerosol forms a system for generating an aerosol.

[0023] In some embodiments, the first major boundary surface and the second major boundary surface of the combined device can define the main flow axis of the fluid flowing through the heating chamber. In some embodiments, the heating chamber can include an upstream end and a downstream end. In some embodiments, the device can be configured so that in use, the fluid flow from the upstream end of the heating chamber to the downstream end is substantially parallel to the direction of the main flow axis.

[0024] In some embodiments, the device may be configured so that in use, fluid flows or can flow through the upstream end of the heating chamber in a direction substantially parallel to the main flow axis. In some embodiments, the first major boundary surface and the second major boundary surface may be arranged (e.g., when extending in a facing parallel relationship) so that the fluid leaving the heating chamber flows in a direction substantially parallel to the main flow axis.

[0025] As used herein, the term "causing the fluid leaving the heating chamber to flow in a direction" is intended to mean that the fluid flowing through the heating chamber is directed in a desired direction ( Right now , essentially parallel to the main flow axis).

[0026] The device for generating an aerosol may include an aerosol generating device. In some embodiments, the device for generating an aerosol may include an electronic device. The device for generating an aerosol may include a smoking device, such as an electrically heated smoking device. The smoking device ( For example , electrically heated smoking devices) can be used to generate an aerosol, for example, which can be inhaled by a user.

[0027] The device may include a first and a second end. The device may extend between the first and second ends in a direction substantially parallel to the main flow axis. The first end may include a mouthpiece end. The device may include a mouthpiece that may be integrally or non-removably attached to the rest of the device. Alternatively, the device may include a mouthpiece that is removably attached or attachable to the rest of the device. Alternatively, the device may be configured, for example, without a mouthpiece and may include a mouthpiece connector for connecting to the mouthpiece. The heating chamber may be located at or near the second end of the device. Alternatively, the heating chamber may be located between the first and second ends of the device. The first end may include the upstream end of the device. The second end may include the downstream end of the device. In use, a user may draw at the first end to inhale an aerosol generated by the device.

[0028] The device may be a portable or handheld device, which may be comfortable for a user to hold between the fingers of one hand, for example.

[0029] In some embodiments, the device may include a housing, for example, within which the heating chamber may be housed. The housing may be formed from any suitable material or combination of materials, for example, a plastic material, a metal wait . Device ( For example The housing may be substantially flat on one or more of its outer surfaces, for example, may have a substantially parallelepiped shape. The housing may include a first and a second part, for example, which may be movable relative to each other. The first part may be attached or attachable to the first major boundary surface. The second part may be attached or attachable to the second major boundary surface.

[0030] In some embodiments, the first major boundary surface is movable relative to the second major boundary surface, for example into an open position or state in which an article for forming an aerosol comprising an aerosol-forming substrate can be inserted into or removed from the heating chamber. In some embodiments, the first major boundary surface is slidable relative to the second major boundary surface, for example into an open position or state. In some embodiments, the first major boundary surface is pivotable relative to the second major boundary surface, for example into an open position or state.

[0031] In some embodiments, the first main boundary surface is maintained in an open position or state relative to the second main boundary surface. For example, the device may include a retaining device or mechanism for maintaining the first main boundary surface in an open position or state. In the case where the first main boundary surface is pivotable relative to the second main boundary surface, the retaining device or mechanism may include one or more hinges, for example, it can be arranged or can be arranged to attach the first main boundary surface to the rest of the device in a hinged or pivotable manner. In the case where the first main boundary surface is slidable relative to the second main boundary surface, the retaining device or mechanism may include a sliding mechanism. The sliding mechanism can be arranged so that the first main boundary surface can slide toward and / or away from the open position or state (for example, in a direction substantially parallel to the main flow axis). In some embodiments, the first main boundary surface and the second main boundary surface can be operably associated with each other, for example to allow the insertion and / or removal of an article for forming an aerosol (for example, into and / or out of the heating chamber).

[0032] In some embodiments, the device may include a hole or opening for inserting and / or removing an article for forming an aerosol including an aerosol-forming substrate into the heating chamber. The hole or opening may be located at or near the second end of the device (where provided). The hole or opening may be located upstream of the heating chamber. The hole or opening may extend into and / or through the housing of the device (where provided). The hole and / or opening may extend in a direction substantially parallel to the main flow axis. Alternatively, the hole or opening may extend in a direction substantially perpendicular to the main flow axis. Alternatively, the hole or opening may extend in a direction at an acute angle to the main flow axis. The hole or opening may be configured as ( For example The aperture or opening may be shaped and / or sized to allow passage of an article for forming an aerosol, for example so that the article is removable from the device and / or insertable into the device. The aperture or opening may comprise one or more guide surfaces, for example, configured to facilitate passage of the article for forming an aerosol through the aperture or opening. The or each guide surface may extend in a direction that is at an acute angle to the main flow axis. The or each guide surface may be at least partially curved.

[0033] In some embodiments, for example when the first major boundary surface and the second major boundary surface are in a facing parallel relationship, the heating chamber may be configured to enclose an article for forming an aerosol comprising an aerosol-forming substrate received therein. In some embodiments, the first and / or second major boundary surface may be substantially flat. The heating chamber may comprise a generally parallelepiped shape.

[0034] In some embodiments, the upstream end of the heating chamber may include a fluid inlet. The downstream end of the heating chamber may include a fluid outlet. The fluid outlet may be in fluid communication with the first end of the device (where provided), for example, may be operably fluidly connected to the first end of the device. The device may include one or more air inlets, for example, extending through and / or into the housing of the device (where provided). The one or more air inlets may be in fluid communication with the fluid inlet, For example May be in operable fluid communication with the fluid inlet.

[0035] The heating chamber may include a first and a second secondary boundary surface. The first and second secondary boundary surfaces may extend in a substantially parallel relationship facing each other, for example and substantially parallel to the main flow axis. The first and second secondary boundary surfaces may extend in a direction substantially perpendicular to a plane defined by the first and / or second primary boundary surface.

[0036] The first main boundary surface and the second main boundary surface can each have width and length." width " can be defined as the distance between the opposite edges of the surface extending in the direction roughly perpendicular to the main flow axis." length " can be defined as the distance between the opposite edges of the surface extending in the direction roughly parallel to the main flow axis. In facing parallel relationship, the first main boundary surface and the second main boundary surface can be spaced apart from each other by a distance less than any one of its length and width, for example, they can be spaced apart from each other by a distance less than half of any of its length and width. In some embodiments, the width of the first and / or second main boundary surface can be between 5,6,7 or 8mm to 9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24 or 25mm. In some embodiments, the length of the first and / or second major boundary surface can be between 5,6,7 or 8 mm and 9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24 or 25 mm. The length of the first and / or second major boundary surface can be greater than or equal to the size of its width. The first and / or second major boundary surface can have a substantially constant width along its length. When the width of the first and / or second major boundary surface changes along its length, the above-mentioned size is related to the average width.

[0037] In some embodiments, when the first major boundary surface and the second major boundary surface extend in a facing parallel relationship, the first major boundary surface and the second major boundary surface are separated from each other by a distance of less than 5 mm, such as less than 4 mm, such as less than 3 mm, For example Less than 2.5mm.

[0038] In some embodiments, the first and / or second boundary surfaces may be relatively oriented toward and / or away from the other of the first and second boundary surfaces or toward each other ( For example The first and / or second boundary surfaces may be movable during use to reduce the volume of the heating chamber and / or to contact and / or impact the article for forming an aerosol received therebetween. The device may be configured or configurable to move the first and / or second boundary surfaces toward the other of the first and second boundary surfaces or toward and / or away from each other (e.g., in a direction perpendicular to the main flow axis), for example, when an article for forming an aerosol is received therebetween. The movement of the first and / or second boundary surfaces toward the other of the first and second boundary surfaces or toward each other may be configured to reduce the volume of the article for forming an aerosol received therebetween, for example, thereby at least partially compressing or squeezing the article for forming an aerosol. At least partially compressing or squeezing the article for forming an aerosol may cause or trigger movement of one or more substances within and / or from the article for forming an aerosol. Movement of the first and / or second boundary surface toward the other of the first and second boundary surface or toward each other may be configured to reduce the volume of the article for forming an aerosol, for example thereby at least partially compressing or squeezing the article for forming an aerosol. At least partially compressing or squeezing the article for forming an aerosol may cause or trigger movement of one or more substances within and / or from the article for forming an aerosol (e.g. at least some of the aerosol-forming substrate may move in this manner).

[0039] The device may be configured or configurable to move the first and / or second boundary surface towards the other of the first and second boundary surface or towards each other when a triggering event is reached. The triggering event may include one or more of the following: the number of puffs on the device (e.g., which may be monitored by a sensor); a preset time interval after the first puff (or after any particular number of puffs); the temperature of one or each of the primary boundary surface and / or the heating chamber and / or the article for forming an aerosol received therein reaches a preset temperature (wherein the temperature inside the device 1 and / or the article may be monitored directly or indirectly by a sensor).

[0040] The device may include a moving device or mechanism arranged to move the first and / or second boundary surface towards and / or away from the other of the first and second boundary surfaces or towards and / or away from each other. The moving device or mechanism may include a gear, a ratchet or the like.

[0041] In some embodiments, the apparatus may include a holding device or mechanism for holding ( example like The holding means or mechanism may comprise one or more supports, which may be fixed or movable relative to the heating chamber, for example. Where the one or more supports are movable relative to the heating chamber, one, some or each support may be resiliently biased towards or away from a holding position in which the article for forming an aerosol is held or retainable within the heating chamber. The holding means may comprise one or more snaps, clamps or clips, which may be configured to grip and engage the article for forming an aerosol, thereby retaining it in the heating chamber.

[0042] The device may include, for example, a turntable or tray for supporting and / or guiding the article for forming an aerosol. The device may be configured to enable and / or support the turntable or tray to slide into and / or out of the heating chamber. The holding device or mechanism may be configured to releasably hold the turntable or tray, for example so that the article for forming an aerosol held therein or thereon is at least partially received in the heating chamber.

[0043] In some embodiments, the device may include an engagement device or mechanism for engaging and / or moving the article for forming an aerosol into and / or out of the heating chamber. The device may include, for example, a housing, and the housing may include the engagement device or mechanism. The engagement device or mechanism may include an extension of the housing. The extension may, for example, extend outside the first major boundary surface in a direction substantially parallel to the first major boundary surface. The extension (e.g., at least a portion thereof) may be deformable ( For example , elastically) or removably ( For example , elastically), for example in a direction perpendicular to the plane defined by the first main boundary surface. The extension portion may include a free end. The free end may be tapered or curved or beveled.

[0044] The extension portion may be provided with a surface effect configured to enhance the coefficient of friction of its surface. For example, the extension portion may be provided with reliefs and / or protrusions that may be defined or arranged as a pattern. Additionally or alternatively, the extension portion may be formed of and / or coated with a material having a relatively high coefficient of friction.

[0045] In use, a user of the device may partially depress or deform the extension portion towards the second major boundary surface. The article for forming an aerosol located near the extension portion may thereby be engaged and / or grasped near the extension portion. The user may then move (e.g. slide) the first major boundary surface relative to the second major boundary surface to move the article for forming an aerosol into and / or out of the heating chamber.

[0046] The engagement means or mechanism may comprise an abutment member or element. The abutment member or element may be movable relative to the first and / or second major boundary surface, for example may be at least partially movable into and / or through the heating chamber. The abutment member or element may be configured to pull or push or drive the article for forming an aerosol from the heating chamber.

[0047] The adjacent member or element can be releasably connected to the first boundary surface. For example, the abutment member or element can be releasably connected to the extension of the shell (where provided). The engagement device or mechanism may include a coupling mechanism for releasably connecting the adjacent member or element to the first main boundary surface or the extension of the shell. The coupling mechanism may include an engagement member and a matching recess. The adjacent member or element may include one of the engagement member and the recess, and the extension may include the other of the engagement member and the recess. The engagement member may be elastically biased to engage and / or recess with the recess.

[0048] In some embodiments, the device may include a flavor release device or mechanism for selectively releasing other or additional flavors from the product to form an aerosol received in the heating chamber. The flavor release device or mechanism may include a clamping element, for example, a clamping element operable to relatively reduce the size of at least a portion of the product for forming an aerosol received in the heating chamber ( For example , thickness). The flavor release device or mechanism may be located near the heating chamber ( For example , directly adjacent) and located outside the heating chamber. The flavor release device or mechanism may be manually operated, for example, by a user of the device. The flavor release device or mechanism may be biased (e.g., resiliently) toward or away from a state or position in which the article for forming an aerosol is engaged or engageable with the article received in the heating chamber. The flavor release device or mechanism may include a resilient biasing member, such as a spring. The flavor release device or mechanism (or at least a portion thereof) may be movable relative to the heating chamber in a direction substantially perpendicular to the mainstream axis.

[0049] The device may include a flavor generation chamber, which may be located adjacent to the heating chamber ( For example , directly adjacent). The flavor generation chamber may be in fluid communication with the heating chamber. At least a portion of the flavor release device or mechanism may be moved into and / or out of the flavor generation chamber in use. The clamping element may include a button. The flavor release device or mechanism may include a clamping surface, for example for engaging a portion of the article for forming an aerosol that extends and / or protrudes beyond or outside the heating chamber (e.g., an extended portion of the article for forming an aerosol).

[0050] The flavor release device or mechanism may be configured or configurable to release flavor from a volatile flavor generating component of the article for forming an aerosol. The flavor release device or mechanism may be configured or configurable to apply a force to the volatile flavor generating component or any combination thereof, change its temperature and / or apply a chemical component to it or release a chemical. The flavor release device or mechanism may be configured or configurable to at least partially crush or deform a capsule located in or on the article for forming an aerosol (e.g., located in or on an extension of the article for forming an aerosol).

[0051] The flavor release device may include a portion of the housing (e.g., a portion of the first portion of the housing and / or an extension of the first portion of the housing (where provided)). The flavor release device may include a portion of the housing configured to be deformable relative to an adjacent portion of the housing. The flavor release mechanism may include a clamping member and a clamping hole extending through the housing. The clamping member may include a clamping surface disposed thereon. The clamping member and / or the clamping hole may include a retaining device or mechanism, for example, configured to retain the clamping member relative to and / or within the clamping hole and / or device. The retaining device or mechanism may include one or more protrusions extending from the clamping member and / or the clamping hole ( For example , annular protrusion). The clamping member may include a button.

[0052] In some embodiments, the device may include a heater, For example For heating the first and / or second main boundary surface ( For example , which may therefore comprise a heated surface). For the avoidance of doubt, where a "heater" is described, one or more heaters may be meant. The heater may comprise a resistive heater and / or an induction heater. Where the heater comprises a resistive heater, the first and / or second major boundary surface may comprise a heating element, such as a heating coil or vane.

[0053] The first and / or second major boundary surface may include one or more protrusions, such as a pattern of protrusions. example like The pattern of protrusions) can be configured to relatively increase the working surface area of ​​the first and / or second main boundary surface. Therefore, the heat transfer between the first and / or second main boundary surface and the article for forming an aerosol received in the heating chamber can be relatively enhanced. In some embodiments, the first and / or second main boundary surface may include corrugations, for example including substantially parallel peaks and valleys. In some embodiments, the peaks and valleys may extend in a direction substantially parallel to the main flow axis. In some embodiments, at least a portion of the first and / or second main boundary surface may be at least partially elastic, For example , may be formed of an elastic material and / or may be elastically biased or supported.

[0054] Where the heater comprises an induction heater, the heater may comprise one or more induction coils, each induction coil surrounding the heating chamber, For example Extending around the first and second major boundary surfaces.The longitudinal axis of the or each induction coil may be substantially parallel to the main flow axis.

[0055] As used herein, the term "longitudinal axis" with respect to an induction coil refers to an axis extending through the center of the coil in a direction generally perpendicular to the turns of the coil.

[0056] The device may include an induction heater arranged to inductively heat a susceptor of the article to form an aerosol received in the heating chamber. The induction heater may include one or more induction coils located near the first and / or second main boundary surfaces. The longitudinal axis of the induction coil or each induction coil may be substantially perpendicular to the main flow axis, for example perpendicular to the plane defined by the first main boundary surface. In use, the susceptor of the article for forming an aerosol may be inductively heated by the induction coil or each induction coil. The susceptor then sequentially heats the aerosol-forming substrate surrounding it conductively, convectively and / or radiatively.

[0057] "Susceptor" refers to an element that generates heat in a changing magnetic field or alternating magnetic field. Typically, the susceptor is electrically conductive, and the heating of the susceptor is the result of eddy currents or hysteresis losses induced in the susceptor. Both hysteresis losses and eddy currents may occur in the susceptor. The susceptor may include graphite, molybdenum, silicon carbide, stainless steel, niobium, aluminum, and any other conductive element. Advantageously, the susceptor element is a ferrite element. The material and geometry of the susceptor element may be selected to provide the desired resistance and heat generation.

[0058] In operation of the induction heater, a high frequency alternating current is passed through one or more induction coils to generate one or more corresponding alternating magnetic fields which induce a voltage in a susceptor of the article. The induced voltage causes a current to flow in the susceptor, and this current causes Joule heating of the susceptor, which in turn heats the aerosol-forming substrate. If the susceptor is ferromagnetic, hysteresis losses in the susceptor will also generate heat.

[0059] The term “high frequency” denotes a frequency of about 500 kilohertz (KHz) to about 30 megahertz (MHz), including the range of 500 KHz to 30 MHz, particularly about 1 megahertz (MHz) to about 10 MHz, including the range of 1 MHz to 10 MHz, and even more particularly about 5 megahertz (MHz) to about 7 megahertz (MHz), including the range of 5 MHz to 7 MHz.

[0060] Throughout this disclosure, the term "magnetic field" may refer to a changing or alternating magnetic field.

[0061] Throughout this disclosure, the term "electrical current" may refer to alternating current.

[0062] In some embodiments, where the first major boundary surface is movable relative to the second major boundary surface, the heater can include a contact configured to engage when the first major boundary surface and the second major boundary surface are in a facing parallel relationship, and to disengage, for example, when the first major boundary surface is in an open position or state relative to the second major boundary surface.

[0063] The heater may be configured or configurable to heat the article for forming an aerosol received in the heating chamber to a temperature of less than 400 degrees Celsius, such as less than 300 degrees Celsius, such as less than 270 degrees Celsius. In some embodiments, the heater may be configured or configurable to heat the article for forming an aerosol received in the heating chamber to a temperature of less than 250, 225, 200, 175, or 150 degrees Celsius, such as less than 140, 130, 120, 110, 100, or 90 degrees Celsius.

[0064] The heater may include a plurality of heaters (i.e., multiple heaters). For example, the heater may include one or more resistive heaters and / or one or more inductive heaters. Where the heater includes a plurality of heaters, one or more heaters may be activated or activatable at a different time than one or more other heaters. Additionally or alternatively, one or more heaters may be arranged to heat a first portion of the first and / or second main boundary surface, while one or more other heaters may be arranged to heat a second different portion of the first and / or second main boundary surface. Additionally or alternatively, one or more heaters may be arranged to inductively heat a susceptor in a first region of the article received in a heating chamber for forming an aerosol, while one or more other heaters may be arranged to inductively heat a susceptor in a second different region of the article received in the heating chamber for forming an aerosol. Additionally or alternatively, one or more heaters may be arranged to heat a first region of the heating chamber, while another heater may be arranged to heat a second different region of the heating chamber. Additionally or alternatively, one or more heaters may be configured or configured to heat to a first temperature, while another heater may be configured or configured to heat to a second temperature, for example where the second temperature is greater than the first temperature.

[0065] In some embodiments, the device may include a power source, such as a power source. The power source may be operably connected or connectable to the heater (where provided). The power source may include a battery and / or a capacitor and / or a supercapacitor. In some embodiments, the power source may include a fuel reservoir, which may be activated to heat the heater in use. The fuel reservoir may include a fluid or solid fuel. In the case where the fuel is in fluid form, the fuel may be delivered to the heater in use. For example, the fuel reservoir may be operably connected to the heater fluid.

[0066] In some embodiments, the device may include a control device or mechanism, for example configured or configurable to control the operation of the device. The control device or mechanism may include circuitry, for example on a printed circuit board. The control device or mechanism may be configured or configurable to control, in use, the power from the power source (where provided) to the heater ( For example The control device or mechanism may be programmed or programmable to control the thermal energy supplied by the heater to the article for forming an aerosol received in the heating chamber. For example, the control device or mechanism may be programmed or programmable to control the power ( For example fuel) duration and / or control the power supplied to the heater at a given time interval ( For example amount of fuel).

[0067] In some embodiments, the device may include a trigger device or mechanism for activating the device, such as for activating the device to generate an aerosol. The trigger device or mechanism may include a manually operated or operable actuator or actuator, such as a switch or button. Additionally or alternatively, the trigger device or mechanism may include an automatically operated or operable actuator or actuator, such as a switch actuated by a threshold pressure or fluid flow rate. In some embodiments, the device may include a check valve or a one-way valve that is configured or configurable to restrict flow through or within the device in a single direction, such as being configured or configurable to allow inhalation through the device and prevent exhalation through the device. Inhalation through the device may include the fluid ( For example air). Exhalation through the device may include the flow of fluid ( For example air) flow.

[0068] The resistance to draw (RTD) of the aerosol generating device having the article for forming an aerosol received in the heating chamber may be between about 80 mmWG and about 140 mmWG. As used herein, the resistance to draw is expressed in pressure units "mmWG" or "millimeters of water gauge" and is measured according to ISO 6565:2002.

[0069] The device may include a cooling chamber, for example in fluid communication with the heating chamber. The cooling chamber may be in fluid communication with the mouthpiece or mouthpiece end of the device (where provided). The cooling chamber may be configured or configurable to cool a mixture of fluid and volatile compounds flowing into it. The cooling chamber may have a cross-sectional area ( For example , perpendicular to the main flow axis) relatively larger cross-sectional area ( For example perpendicular to the flow direction into the cooling chamber).

[0070] According to the present invention, there is provided a system for generating an aerosol, the system comprising a device as described herein and an article for forming an aerosol.

[0071] In some embodiments, the article for forming an aerosol can be shaped to fit closely to the heating chamber, for example, to fit the shape and / or size of the heating chamber. Additionally or alternatively, the article for forming an aerosol can include one or more extensions configured to ( For example The article may be sized and / or shaped to extend from the heating chamber when received in the heating chamber. The extension portion may be attached or connected to the main portion of the article to form an aerosol. The extension portion may extend from the side, edge or end of the article to form an aerosol. The shape of the article for forming an aerosol may generally be a parallelepiped. The article for forming an aerosol may have a width, a length and a thickness. The thickness may be less than the width and the length. The article may have a substantially flat first major surface. The article may have a substantially flat second major surface. The first and second major surfaces may be substantially parallel to each other, for example, may extend in a substantially parallel relationship. The article may include an upstream end. The article may include a downstream end. The article may be configured or arranged so that, when it is inserted into the heating chamber of the device for forming an aerosol, a fluid may flow through the article (e.g., from the upstream end to the downstream end).

[0072] Preferably, the aerosol-forming substrate comprises nicotine.The aerosol-forming substrate may comprise tobacco.Alternatively or additionally, the aerosol-forming substrate may comprise a non-tobacco containing aerosol-forming material.

[0073] If the aerosol-forming substrate is a solid aerosol-forming substrate, the solid aerosol-forming substrate may include, for example, one or more of the following: powders, granules, pellets, fragments, strips, strips or sheets, which contain one or more of the following: herb leaves, tobacco leaves, tobacco ribs, flat tobacco and homogenized tobacco.

[0074] Optionally, the solid aerosol-forming substrate may contain tobacco or non-tobacco volatile flavour compounds that are released upon heating of the solid aerosol-forming substrate.

[0075] If the aerosol-forming substrate is in fluid form, such as a liquid or a gas, the aerosol-forming substrate may comprise tobacco or non-tobacco volatile flavour compounds which are released upon heating of the fluid aerosol-forming substrate.

[0076] Optionally, the solid aerosol forming substrate can be arranged on or embedded in a heat-stable carrier. The carrier can take the form of a powder, granules, pellets, fragments, thin strips, strips or sheets. Solid or fluid aerosol forming substrates can be deposited in the entire carrier, for example, deposited on its entire volume. The solid aerosol forming substrate can be deposited on the surface of the carrier in the form of, for example, sheets, foams, gels or slurries. The solid aerosol forming substrate can be deposited on the entire surface of the carrier, or alternatively, can be deposited in a certain pattern, so that uneven flavor delivery is provided during use.

[0077] The article for forming an aerosol may comprise a volatile flavour generating component. Where provided, the or each extended portion of the aerosol-forming substrate may comprise a volatile flavour generating component.

[0078] As used herein, the term "volatile flavour generating component" is used to describe any volatile component that is added to an aerosol-forming substrate to provide flavour.

[0079] The volatile flavor generating components may be in liquid or solid form. The volatile flavor generating compounds may be coupled to or otherwise associated with the support element. The support element may include any suitable substrate or support for positioning, supporting or retaining the flavor generating components. For example, the support element may include a fibrous support element that may be saturated or saturable with a fluid, such as a liquid.

[0080] In some embodiments, the volatile flavor generating component can have any suitable structure, wherein the structural material releasably surrounds one or more flavors. For example, in some preferred embodiments, the volatile flavor generating component includes a substrate structure that defines multiple regions, such as when the aerosol-forming substrate is subjected to external forces, the flavors are captured in the regions until released. Alternatively, the volatile flavor generating component can include a capsule. Preferably, the capsule includes a shell and an inner core containing the flavors. Preferably, the shell is sealed before the external force is applied, but the shell is fragile or breakable to release the flavor when the external force is applied. The capsule can be formed in a variety of physical forms, including but not limited to single-part capsules, multi-part capsules, single-wall capsules, multi-wall capsules, large capsules and small capsules.

[0081] If the volatile flavor generating component comprises a matrix structure defining a plurality of regions surrounding a flavor, the flavor delivery member can stably release the flavor when the aerosol-forming substrate is subjected to an external force. Alternatively, if the volatile flavor generating component is a capsule arranged to break or rupture to release the flavor when the article for forming an aerosol is subjected to an external force (for example, but not limited to, if the capsule comprises an outer shell and an inner core), the capsule can have any desired rupture strength. The rupture strength is the force at which the capsule ruptures (the force applied to the capsule from the outside of the aerosol-forming substrate). The rupture strength can be the peak value of the force versus compression curve of the capsule.

[0082] The volatile flavor generating component may be configured to release the flavor in response to an activation mechanism.Such an activation mechanism may include application of a force to the filter, a temperature change in the filter, a chemical reaction, or any combination thereof.

[0083] Suitable flavorants include, but are not limited to, materials containing natural or synthetic menthol, mint, spearmint, coffee, tea, spices (such as cinnamon, cloves and ginger), cocoa, vanilla, fruit flavorings, chocolate, eucalyptus, geranium, eugenol, agave, juniper, anethole and linalool.

[0084] As used herein, the term "menthol" is used to describe the compound 2-isopropyl-5-methylcyclohexanol in any of its isomeric forms.

[0085] Menthol may be used in solid or liquid form. Menthol may be provided in solid form as granules or particles. The term "menthol solid particles" may be used to describe any granular or particulate solid material comprising at least about 80% menthol by weight.

[0086] Preferably, 1.5 mg or more of the volatile flavour-generating component is contained in the aerosol-forming substrate.

[0087] Preferably, the aerosol-forming substrate comprises an aerosol-forming agent.

[0088] As used herein, the term "aerosol former" is used to describe any suitable known compound or mixture of compounds that promotes the formation of an aerosol in use and is substantially resistant to thermal degradation at the operating temperature of the aerosol-generating article. Suitable aerosol formers are known in the art and include, but are not limited to: polyols, such as propylene glycol, triethylene glycol, 1,3-butylene glycol, and glycerol; esters of polyols, such as mono-, di-, or triesters of glycerol; and aliphatic esters of mono-, di-, or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate

[0089] Preferred aerosol formers are polyols or mixtures thereof such as propylene glycol, triethylene glycol, 1,3-butylene glycol and most preferably glycerol.

[0090] The aerosol-forming substrate may comprise a single aerosol-forming agent. Alternatively, the aerosol-forming substrate may comprise a combination of two or more aerosol-forming agents.

[0091] Preferably, the aerosol-forming substrate has an aerosol-former content of greater than 5% by dry weight.

[0092] The aerosol-forming substrate may have an aerosol-former content of between about 5% and about 30% by dry weight.

[0093] In a preferred embodiment, the aerosol-forming substrate has an aerosol-former content of about 20% by dry weight.

[0094] According to the present invention, there is provided a method of using a device for generating an aerosol as described herein.

[0095] According to the present invention, there is provided a method for generating an aerosol, the method comprising:

[0096] providing an apparatus for generating an aerosol, the apparatus comprising a heating chamber for receiving an article for forming an aerosol, the heating chamber comprising an upstream end, a downstream end, and a first major boundary surface and a second major boundary surface extending in a facing parallel relationship; and

[0097] The fluid is caused to flow from the upstream end to the downstream end of the heating chamber in a direction substantially parallel to a main flow axis defined by the first major boundary surface and the second major boundary surface.

[0098] The method may include: placing an aerosol-forming article ( For example The device may include a cooling chamber in fluid communication with the heating chamber and a mouthpiece end of the device.

[0099] According to the present invention, there is provided a method for generating an aerosol, the method comprising:

[0100] providing an apparatus for generating an aerosol, the apparatus comprising a heating chamber for receiving an article for forming an aerosol, the heating chamber comprising a first major boundary surface and a second major boundary surface extending in a facing parallel relationship;

[0101] Providing an article for forming an aerosol, the article comprising an aerosol-forming substrate; and

[0102] The article is inserted into the heating chamber of the apparatus such that the article contacts both the first major boundary surface and the second major boundary surface.

[0103] The method may include heating the article in a heating chamber of the device, for example to generate an aerosol (or vapor). Where vapor is generated, the method may include cooling the vapor or causing the vapor to cool, for example to condense the vapor into an aerosol. The device may include a cooling chamber in fluid communication with the heating chamber and the mouthpiece end of the device.

[0104] Unless otherwise specified, all scientific and technical terms used herein have the meaning commonly used in the art. Definitions provided herein are to facilitate understanding of certain terms frequently used herein.

[0105] Throughout the detailed description and claims of this specification, the words "comprise" and "include" and their variants mean "including but not limited to", and are not intended to (and do not) exclude other parts, additives, components, integral bodies or steps. Throughout the detailed description and claims of this specification, the singular encompasses the plural and vice versa, unless the context requires otherwise. In particular, where the indefinite article is used, the specification should be understood to contemplate the plural as well as the singular, unless the context requires otherwise.

[0106] For the avoidance of doubt, any feature described herein is equally applicable to any aspect of the present invention. It is clearly contemplated within the scope of the present application that the various aspects, embodiments, examples and alternatives set forth in the preceding paragraphs, in the claims and / or in the following detailed description and drawings, in particular individual features thereof, may be employed independently or in any combination. Features described in conjunction with one aspect or embodiment of the present invention are applicable to all aspects or embodiments unless such features are incompatible. BRIEF DESCRIPTION OF THE DRAWINGS

[0107] The invention will now be further described, by way of example only, with reference to the accompanying drawings, in which:

[0108] Figure 1 is a schematic perspective view of a device for generating an aerosol according to an embodiment of the present invention;

[0109] Figure 2 is along Figure 1 A partial cross-sectional view taken along the plane AA defined in FIG.

[0110] Figure 3 is from Figure 2 A close-up cross-sectional view taken from part B of FIG.

[0111] Figure 4 is a schematic perspective view of a heating arrangement for use in a device for generating an aerosol according to an embodiment of the present invention; and

[0112] Figure 5is a schematic perspective view of an alternative heating arrangement for use in a device for generating an aerosol according to an embodiment of the present invention. DETAILED DESCRIPTION

[0113] Reference now Figure 1 , 2 3, a device 1 for generating an aerosol is shown, the device 1 comprising a first mouthpiece end 1a and a second distal end 1b, between which a housing 2 extends. In this embodiment, the device 1 has a generally parallelepiped shape. In this embodiment, the housing 2 is formed of a plastic material and can be molded into a desired shape according to molding techniques known in the art. However, in some embodiments, the housing 2 can have any suitable shape and can be formed of any suitable material and / or combination of materials.

[0114] The mouthpiece end 1a of the housing 2 (which provides the downstream end) comprises a mouthpiece 2a which is removably attached to the remainder of the housing 2 by a push fit. However, in some embodiments the mouthpiece 2a may be integrally formed with the remainder of the housing 2.

[0115] The distal end 1b of the device 1 includes an electrical connection EC for programming a control unit (not shown) in the housing 2, receiving data from a memory (not shown) in the housing 2 and / or charging a power source (not charged) in the housing 2. The electrical connection EC may include one or more of a micro USB, a USB-C or a custom connection. The distal end 1b of the device 1 may also include an alarm mechanism (not shown), for example, an audio device such as a speaker and / or a light source such as a light emitting diode (LED). The alarm mechanism may be configured or configurable to warn a user of the device 1 of a change in the state of the device 1, such as the need to charge the power source.

[0116] Figure 2 and Figure 3 3 is shown in the apparatus 1 for forming an aerosol comprising an aerosol-forming substrate 30. However, as will be appreciated by those skilled in the art, the article 3 is separate from the apparatus 1 and does not form part of the apparatus.

[0117] like Figure 2 and Figure 3 As best shown in FIG. 1 , the device 1 further comprises a heater 4, a heating chamber 5, an optional flavor generation chamber 6, and a cooling chamber 7 located within the housing 2 between the mouthpiece and the distal ends 1a, 1b of the device 1. The heating chamber 5 is directly adjacent to and in fluid communication with the optional flavor generation chamber 6. The optional flavor generation chamber 6 is in fluid communication with the cooling chamber 7, which in turn is in fluid communication with the mouthpiece end 1b of the device 1. A button 8 is located adjacent the optional flavor generation chamber 6.

[0118] The heating chamber 5 includes a first main boundary surface and a second main boundary surface 5a, 5b. In addition, a secondary boundary surface (not shown) extends between the first and second main boundary surfaces 5a, 5b. The first and second main boundary surfaces 5a, 5b are substantially flat and are formed of metal, for example, iron or an alloy thereof. The heating chamber 5 has a substantially parallelepiped shape. Figure 2 and 3 As shown, the device 1 is in a first closed state, wherein the first and second main boundary surfaces 5a, 5b are in a facing parallel relationship. The first and second main boundary surfaces 5a, 5b define a main flow axis P from the upstream end US to the downstream end DS so that the fluid flows through the product 3 received therebetween. The inlet 5c is provided at one end (upstream end US) of the heating chamber 5 and is in fluid communication with the outside of the housing 2. The outlet 5d is provided at the opposite end (downstream end DS) of the heating chamber 5. The main flow axis P is between the inlet 5c and the outlet 5d ( For example The flow paths of the upstream and downstream ends (US, DS) extend between and parallel to them.

[0119] The heater 4 comprises an induction coil 4a extending around the periphery of the heating chamber 5. The induction coil 4a is arranged to inductively heat the first and second main boundary surfaces 5a, 5b in use. In this embodiment, the induction coil 4a is embedded in the housing 2, however, in some embodiments, the induction coil 4a may be located in the chamber of the housing 2. Figure 4 As more clearly shown in , the longitudinal axis L of the induction coil 4a is parallel to the main flow axis P, so that the magnetic field M generated thereby is (in use) perpendicular to the main flow axis P. The heater 4 is operatively connected or connectable to a power supply.

[0120] The first main boundary surface 5a is attached to the first part 2b of the housing 2, and the second main boundary surface 5b is attached to the second part 2c of the housing 2. The first part 2b of the housing 2, and therefore the first main boundary surface 5a, is slidable relative to the second part 2c and the second main boundary surface 5b of the housing 2 in a direction parallel to the main flow axis P. The electrical contact (not shown) in the first part 2b of the housing 2 is configured to contact the electrical contact (not shown) in the second part 2c of the housing 2 when the first and second main boundary surfaces 5a, 5b are in a facing parallel relationship (a first closed state), as shown in FIG. Figure 2 and 3 Therefore, when the device 1 is in the first closed state, each turn of the induction coil 4a is electrically connected to itself independently.

[0121] In this embodiment, the first and second main boundary surfaces 5a, 5b may include corrugations (not shown) having parallel peaks and valleys. The peaks and valleys extend in a direction parallel to the main flow axis P.

[0122] The first part 2b of the housing 2 includes an extension part 2d extending in a direction substantially parallel to the first main boundary surface 5a. The extension part 2d is elastically deformable in a direction perpendicular to the plane defined by the first main boundary surface 5a. The free end 2e of the extension part 2d is tapered.

[0123] The removal hole 2f extends through the second part 2c of the shell 2 at a position upstream of the heating chamber 5. The shape and size of the removal hole 2f are designed to allow the used product 3 to be removed from the device 1 therethrough during use. The removal hole 2f is connected to the heating chamber 5 by a removal channel 20. The guide surface of the removal hole 2f is arranged to facilitate the sliding removal of the used product 3 from the device 1 during use. The guide surface extends in a direction that is at an acute angle to the mainstream axis P of the heating chamber 5. In this embodiment, the guide surface is curved. The removal hole 2f may include an air inlet into the device 1. In some embodiments, the device 1 may include one or more additional or alternative air inlets that extend through the shell 2 and are in fluid communication with the heating chamber 5.

[0124] In this embodiment, the mouthpiece 2a includes a transparent portion 2g (eg Figure 1 As shown), the generation of aerosol can be observed during the use of the device 1 through this transparent part.

[0125] The abutment element 9 is movable in the device 1 relative to the housing 2 in the heating chamber 5 and / or out. The abutment element 9 is configured to pull the product 3 out of the heating chamber 5. The abutment element 9 is located in a narrow slot in the device 1, adjacent to and aligned with the optional flavor generation chamber 6 and the heating chamber 5. The abutment element 9 and the extension 2d of the first part 2b of the housing 2 include a coupling mechanism for releasably coupling the two parts together. The coupling mechanism includes an engaging member or snap 9a and a mating recess 9b. Figure 2 and 3 In the embodiment shown, the extension 2d includes a notch 9b, and the abutment element 9 includes an engagement member or catch 9a. However, in some embodiments, the extension 2d may include an engagement member or catch 9a, and the abutment element 9 may include a recess 9b. The engagement member or catch 9a is resiliently biased (e.g., by a spring) toward a position in which it engages with and enters the recess 9b, thereby coupling the extension 2d and the abutment element 9 to each other.

[0126] The button 8 comprises a flavor release mechanism. The button 8 is disposed in a button aperture 8a which is located adjacent to the optional flavor generation chamber 6 and which extends through the extension 2d of the first portion 2b of the housing 2. The button 8 can be moved into and out of the optional flavor generation chamber 6 in use. The button 8 comprises a gripping surface 8b which is arranged to be movable against the article 3 located in the optional flavor generation chamber 6 in use. The button 8 comprises an annular protrusion at or near its end. The button aperture 8b comprises first and second inner abutments which are sized and positioned to engage with the annular protrusion of the button 8, thereby retaining the button 8 within the button aperture 8b while also allowing the button 8 to be moved into and out of the optional flavor generation chamber 6.

[0127] The cooling chamber 7 has a larger cross-sectional area than the fluid flow channel ( For example , greater height and / or width), the cross-sectional area is perpendicular to the flow direction into the cooling chamber 7, and the fluid flow channel connects the optional flavor generation chamber 6 fluid to the cooling chamber 7. The cooling chamber 7 also has a larger cross-sectional area ( For example , greater height and / or width), the cross-sectional area being perpendicular to the flow direction into the cooling chamber 7, the fluid flow channel fluidically connecting the cooling chamber 7 to the mouthpiece end 1a of the device 1.

[0128] The article 3 comprises a main body portion 3a and an optional extension portion 3b extending from the main body portion. The main body portion 3a is sized and shaped to closely conform to the size and shape of the heating chamber 5 when placed in the heating chamber. In this embodiment, the main portion 3a comprises an aerosol-forming substrate 30 in the form of a matrix material in which a liquid aerosol-forming substrate 30 is formed. The optional extension portion 3b comprises a holder material in which a volatile flavor-generating component in the form of a capsule 3c is held. The capsule 3c contains a flavorant, which in this embodiment is methanol.

[0129] In use, the user of the device 1 slides the first part 2b of the housing 2 relative to the second part 2c of the housing 2 in the direction of arrow C, thereby moving the heating chamber 5 to the open state. The product 3 is then placed inside the open device 1. The first part 2b of the housing 2 is then moved relative to the second part 2c of the housing 2 in the direction of arrow D ( Right now, in the direction opposite to the direction indicated by arrow C) until the free end 2e of the extension portion 2d of the shell 2 is located (relatively) above the aerosol-forming substrate 30. The user then applies a vertical force to the extension portion 2d to elastically press the tapered free end 2e of the extension portion 2d onto the article 3. The user then continues to slide the first portion 2b of the shell 2 relative to the second portion 2c of the shell 2 in the direction of arrow C. As a result, the article 3 is engaged by and moves along the free end 2e of the extension portion 2d. In this way, the article 3 is moved into the heating chamber 5. The first portion 2b of the shell 2 slides in the direction of arrow C until the free end 2e of the extension portion 2d engages with a support provided on the second portion 2c of the shell 2, which limits further sliding in this direction. In this closed state, the first and second main boundary surfaces 5a, 5b of the heating chamber 5 are in a parallel facing relationship, and the article 3 is located in the heating chamber 5 (such as Figure 2 and 3 ). The optional extension 3b of the article 3 extends beyond the heating chamber 5 and into the optional flavor generation chamber 6. When the device 1 is in the closed state, the capsule 3c in the optional extension 3b is disposed in the optional flavor generation chamber 6 and aligned with the button 8.

[0130] In the closed state, the engagement member or catch 9a is aligned with the recess 9b and is resiliently biased into engagement therein. In this way, the abutment element 9 is coupled to the extension 2d of the first part 2b of the housing 2 by a coupling mechanism.

[0131] When the user wants to use the device 1, the heater 4 is activated. The activation may be triggered by a trigger mechanism (not shown) such as a flow and / or pressure sensor, which may be configured to respond to changes in airflow and / or air pressure caused by the user taking a puff on the mouthpiece end 1a of the device 1. However, in some embodiments, the trigger mechanism may include a manually activated and / or activatable switch. Electricity from a power source is supplied to the heater 4 under the control of a control unit. In this way, the temperature of the first and second main boundary surfaces 5a, 5b is increased to a volatilization temperature, which in this embodiment is a temperature of less than 270 degrees Celsius. The compound volatilizes from the aerosol-forming substrate 30 of the article 3 by the thermal energy applied from the first and second main boundary surfaces 5a, 5b.

[0132] The user draws air through the device 1 by drawing on the mouthpiece end 1a of the device 1. The air is drawn from the removal aperture 2f through the inlet 5c of the heating chamber 5 along the main flow axis P ( Right nowThe air flows through the article 3 (in parallel thereto) and leaves the heating chamber 5 through the outlet 5d. The air passes through the article 3 from its upstream end US to the downstream end DS, so that the volatilized compounds are entrained into the air flow through the heating chamber 5. When the air flow and the volatilized compound mixture reaches the cooling chamber 7, the mixture expands due to the relatively large cross-sectional area of ​​the cooling chamber 7. The mixture is thereby cooled in the cooling chamber 7, and the volatilized compounds gather and form an aerosol. The aerosol is then drawn through the mouthpiece 2a and drawn toward the user.

[0133] The user can press the button 8 into the optional flavor generation chamber 6 to crush the adjacent capsule 3c within the optional extension 3b of the article 3, thereby releasing the flavor therefrom. The flavor released from the capsule 3c will then be drawn to the user by the air flow through the device 1 caused by the user drawing on the mouthpiece end 1a of the device 1.

[0134] When the supply of volatile compounds of the product 3 is exhausted, a certain number of puffs are applied to the device 1 or the user decides to replace the product 3 for any other reason (such as to experience a different flavor), the product is removed from the device 1. The user slides the first part 2b of the housing 2 relative to the second part 2c of the housing 2 in the direction of arrow D, thereby moving the device 1 from the closed state to the open state. The abutment element 9 (an extension 2d connected to the first part 2b of the housing 2 by a coupling mechanism) is dragged by the first part 2b of the housing 2 to contact the product 3 and push it out of the optional flavor generation chamber 6 and heating chamber 5. The first part 2b of the housing (relative to the second part 2c of the housing 2) continues to slide in the direction of arrow D, causing the abutment element 9 to push the used product 3 into the removal aperture 2f. The guide surface of the removal aperture 2f guides the product 3 to slide out of the device 1, and the product can be collected therefrom by any suitable means.

[0135] Reference now Figure 5 , an alternative heater 14 for heating the contents of the heating chamber 5 of the device 1 is shown. Figure 5 The heater 14 shown is Figure 4 The heater shown differs in that there are two induction coils 14a and the induction coils 14a are arranged so that their longitudinal axes L are perpendicular to the mainstream axis P. The induction coils of the heater 14 are arranged to, in use, heat a susceptor of an aerosol-forming substrate 30 received in the heating chamber 5 .

[0136] Although the first part 2b of the housing 2 is described as being slidable relative to the second part 2c of the housing 2, this need not be the case, and instead the first part 2b may be pivotable relative to and / or removable from the second part 2c. In some embodiments, the first part 2b may be fixed relative to the second part 2c of the housing 2 (so that the first and second major boundary surfaces 5a, 5b of the heating chamber 5 are also fixed relative to each other). Where the first and second parts 2a, 2b are fixed relative to each other, the apparatus 1 may include a bracket for supporting and / or guiding the aerosol-forming substrate into and / or out of the heating chamber 5. The apparatus may be configured to support the bracket in a sliding relationship.

[0137] Although both the first and second main boundary surfaces 5a, 5b are described as being heated by the heater 4, this need not be the case, and only one of the main boundary surfaces 5a, 5b may be heated.

[0138] In some embodiments, the apparatus 1 may include a plurality of heaters, which may include: a heater configured or arranged to heat the first and / or second major boundary surfaces 5a, 5b (e.g., Figure 4 and a heater configured to heat a susceptor of the article 3 received in the heating chamber 5 (e.g., Figure 5 1 and 12. The heater 14 shown may be of a type shown). Alternatively, the device 1 may include a plurality of heaters, the plurality of heaters including: a first heater arranged to heat the first major boundary surface 5a; and a second heater arranged to heat the second major boundary surface 5b. In some embodiments, the device 1 may include a plurality of heaters, one heater being arranged to heat at least a portion of the surface of the article 3 received between the first and second major boundary surfaces 5a, 5b, and the second heater being arranged to heat an interior region of the article 3. Where there are a plurality of heaters, they may be configured to heat at different times and / or at different temperatures. In some embodiments, where the device 1 includes a single heater 4 or a plurality of heaters, it or they may be arranged or configured to heat only one of the first and second major boundary surfaces 5a, 5b.

[0139] The schematic diagrams are not necessarily drawn to scale and are presented for illustrative rather than limiting purposes. The drawings depict one or more aspects described in the present disclosure. However, it should be understood that other aspects not depicted in the drawings fall within the scope of the present disclosure.

Claims

1. A device for generating an aerosol, the device comprising: a heating chamber for receiving an article for forming an aerosol comprising an aerosol-forming substrate; and a cooling chamber in fluid communication with the heating chamber and a mouthpiece end of the device, the heating chamber comprising an upstream end, a downstream end and a first major boundary surface and a second major boundary surface, the first major boundary surface and the second major boundary surface extending in a facing parallel relationship and defining a main flow axis of a fluid flowing through the heating chamber, wherein the device is configured such that in use the flow of fluid from the upstream end to the downstream end of the heating chamber is in a direction substantially parallel to the main flow axis, The apparatus further comprises one or more induction coils for inductively heating the article, wherein the one or more induction coils each surround the heating chamber, and The cooling chamber has a cross-sectional area relatively larger than a cross-sectional area of ​​the heating chamber perpendicular to the main flow axis, the cross-sectional area of ​​the cooling chamber being perpendicular to a flow direction entering the cooling chamber.

2. An apparatus according to claim 1, wherein the apparatus is configured such that, in use, fluid flows through the upstream end of the heating chamber in a direction substantially parallel to the main flow axis.

3. An apparatus according to claim 1 or 2, wherein the first and second main boundary surfaces are arranged to cause fluid leaving the heating chamber to flow in a direction substantially parallel to the main flow axis.

4. A device according to claim 1 or 2, wherein the first major boundary surface is capable of moving to an open position or state relative to the second major boundary surface, in which the aerosol-forming substrate of the article can be inserted into or removed from the heating chamber.

5. The device of claim 4, wherein the first major boundary surface is slidable relative to the second major boundary surface to the open position or state.

6. The device of claim 4, wherein the first major boundary surface is pivotable relative to the second major boundary surface to the open position or state.

7. The device of claim 4, wherein the first major boundary surface is maintained in the open position or state relative to the second major boundary surface.

8. The device of claim 1 or 2, wherein the first major boundary surface and the second major boundary surface are spaced apart from each other by a distance of less than 5 mm when the first major boundary surface and the second major boundary surface extend in a facing parallel relationship.

9. A system for generating an aerosol, the system comprising a device according to any one of claims 1 to 8 and an article for forming an aerosol, wherein the article comprises an aerosol-forming substrate and the article is configured to contact both the first major boundary surface and the second major boundary surface of the device when the article is received in the heating chamber.

10. A method for generating an aerosol, the method comprising: An apparatus for generating an aerosol is provided, the apparatus comprising: a heating chamber for receiving an article for forming an aerosol; and a cooling chamber in fluid communication with the heating chamber and a mouthpiece end of the apparatus, the heating chamber comprising an upstream end, a downstream end, and a first main boundary surface and a second main boundary surface, the first main boundary surface and the second main boundary surface extending in a facing parallel relationship and defining a mainstream axis of a fluid flowing through the heating chamber; the apparatus further comprising one or more induction coils for inductively heating the article, wherein the one or more induction coils each surround the heating chamber, and wherein the cooling chamber has a cross-sectional area that is relatively larger than a cross-sectional area of ​​the heating chamber that is perpendicular to the mainstream axis, the cross-sectional area of ​​the cooling chamber being perpendicular to a flow direction entering the cooling chamber, and Fluid is caused to flow from the upstream end to the downstream end of the heating chamber in a direction substantially parallel to the main flow axis defined by the first and second major boundary surfaces.

11. A method for generating an aerosol, the method comprising: An apparatus for generating an aerosol is provided, the apparatus comprising: a heating chamber for receiving an article for forming an aerosol; and a cooling chamber in fluid communication with the heating chamber and a mouth end of the apparatus, the heating chamber comprising a first major boundary surface and a second major boundary surface, the first major boundary surface and the second major boundary surface extending in a facing parallel relationship and defining a mainstream axis of a fluid flowing through the heating chamber; the apparatus further comprising one or more induction coils for inductively heating the article, wherein the one or more induction coils each surround the heating chamber, and wherein the cooling chamber has a cross-sectional area that is relatively larger than a cross-sectional area of ​​the heating chamber perpendicular to the mainstream axis, the cross-sectional area of ​​the cooling chamber being perpendicular to a flow direction entering the cooling chamber; Providing an article for forming an aerosol, the article comprising an aerosol-forming substrate; and The article is inserted into the heating chamber of the apparatus such that the article contacts both the first major boundary surface and the second major boundary surface.

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