Aerosol-generating device

Abstract

An aerosol-generating device (10) includes a cavity (14) configured to receive an aerosol-forming substrate (22). The cavity includes protruding elements (18) extending in a radial direction. An airflow channel (40) is formed between the protruding elements. The protruding element includes at least a portion of the sensing device. The invention also relates to an aerosol-generating system comprising an aerosol-generating device and an aerosol-generating article comprising an aerosol-forming substrate. The invention also relates to a method for producing the protruding element.

Description

Aerosol generating device

[0001] This invention relates to an aerosol generating apparatus.

[0002] An aerosol generating apparatus for generating inhalable vapors is known. Such an apparatus can heat an aerosol forming matrix to a temperature that causes one or more components of the aerosol forming matrix to volatilize without burning the aerosol forming matrix. The aerosol forming matrix can be provided as part of an aerosol generating article. The aerosol generating article can have a strip shape for inserting the aerosol generating article into a cavity (such as a heating chamber) of the aerosol generating apparatus. Heating elements can be arranged in or around the heating chamber to heat the aerosol forming matrix once the aerosol generating article is inserted into the heating chamber of the aerosol generating apparatus.

[0003] An aerosol generating apparatus with improved airflow is desired. An aerosol generating apparatus with improved preheating of ambient air is desired. An aerosol generating apparatus with improved heating of ambient air is desired. An aerosol generating apparatus with improved suction resistance is desired. Detailed Implementation

[0004] According to embodiments of the present invention, an aerosol generating apparatus is provided, which may include a cavity configured to receive an aerosol forming matrix. The cavity may include protruding elements extending in a radial direction. Airflow channels may be formed between the protruding elements. The protruding elements may include at least a portion of a sensing device. Detailed Implementation

[0005] According to an embodiment of the present invention, an aerosol generating apparatus is provided, comprising a cavity configured to receive an aerosol forming matrix. The cavity includes protruding elements extending in a radial direction. Airflow channels are formed between the protruding elements. The protruding elements include at least a portion of a sensing device.

[0006] Providing a sensing device for a protruding element facilitates the use of protruding elements with dual functions. The first function of the protruding element can be to create airflow channels between protruding elements. The second function of the protruding element can be to form or serve as a mounting point for the sensing device.

[0007] Due to the spatial arrangement of the protruding element, providing a sensing device to it can be particularly advantageous. As will be described in more detail below, the protruding element can face the interior of the cavity and can directly contact the aerosol-generating article received in the cavity. Therefore, providing a sensing device to the protruding element can mean that the sensing device can be close to or in direct contact with the aerosol-generating article. This can benefit various functions of the sensing device.

[0008] As used herein, an "aerosol generating device" relates to an apparatus that interacts with an aerosol-forming matrix to generate an aerosol. The aerosol-forming matrix may be part of an aerosol-generating article, such as a smoking article. The aerosol generating device may be a smoking device that interacts with the aerosol-forming matrix of the aerosol-generating article to generate an aerosol that can be directly inhaled into the user's lungs through the user's mouth. The aerosol generating device may be a retainer. The device may be an electrically heated smoking device. The aerosol generating device may include a housing, a circuit system, a power supply, a heating chamber, and a heating element.

[0009] The cavity of the aerosol generating apparatus may have an open end into which the aerosol-generated article is inserted. The open end may be a proximal end. The cavity may have a closed end opposite the open end. The closed end may be the base of the cavity. The base of the cavity may be circular. The base of the cavity may be located upstream of the cavity. The open end may be located downstream of the cavity. The cavity may have an elongated extension. The cavity may have a longitudinal central axis. The longitudinal direction may be the direction extending along the longitudinal central axis between the open end and the closed end. The longitudinal central axis of the cavity may be parallel to or the same as the longitudinal axis of the aerosol generating apparatus.

[0010] The cavity can be configured as a heating chamber. The cavity can have a cylindrical shape. The cavity can have a hollow cylindrical shape. The cavity can have a shape corresponding to the shape of the aerosol-generating article to be received in the cavity. The cavity can have a circular cross-section. The cavity can have an elliptical or rectangular cross-section. The cavity can have an inner diameter corresponding to the outer diameter of the aerosol-generating article.

[0011] A protruding element that protrudes in the lateral direction can also be referred to as a protruding element that protrudes in the radial direction. This direction can be perpendicular to the longitudinal axis of one or both of the cavity and the aerosol generating device.

[0012] The protruding element may have an elongated extension. The protruding element may have an elongated extension parallel to the longitudinal axis of the cavity.

[0013] Airflow channels can be formed between individual protruding elements. One airflow channel can be formed between two protruding elements. The number of airflow channels can be the same as the number of protruding elements.

[0014] The protruding elements can be evenly arranged around the cavity. Each protruding element can have a central longitudinal axis, and individual protruding elements are arranged around said central longitudinal axis. Each protruding element can have the same distance towards the central longitudinal axis. The central longitudinal axis of the protruding elements can be the same as the longitudinal axis of the cavity.

[0015] The protruding elements together can have a tubular arrangement around the central longitudinal axis of the protruding elements.

[0016] The inner diameter of the cavity can be defined by the distance between the opposing protruding elements. In other words, the protruding elements can be arranged around the outer periphery of the cavity's interior.

[0017] The protruding element can be configured as a rib. The rib can have a length much longer than its width. The length of the rib can be measured parallel to the longitudinal axis of the cavity. The width of the rib can be measured perpendicular to the longitudinal axis of the cavity. The width of the rib can be measured in the lateral direction. The length of the rib can be at least two times, preferably at least three times, preferably at least four times, and most preferably at least five times the width of the rib.

[0018] The rib may have a thickness significantly smaller than its length and width. The thickness of the rib may be measured in the tangential direction relative to the longitudinal axis of the cavity and relative to the tubular arrangement of the protruding element around the longitudinal axis of the cavity. The thickness of the rib may be at least one-half, preferably at least one-third, preferably at least one-quarter, and most preferably at least one-fifth of one of or both of the length and width of the rib.

[0019] The protruding element can be disposed on the inner wall of the cavity. The protruding element can be mounted or attached to the inner wall of the cavity. Alternatively, the protruding element can be integrally formed with the cavity. The remainder of the cavity, i.e., the non-protruding element portion of the cavity, can be tubular. The cavity can form a structural support for the protruding element.

[0020] The protruding element can extend radially inward. In other words, the protruding element can extend radially from the cavity wall toward the longitudinal axis of the cavity.

[0021] Each of the protruding elements may include a radially inwardly facing contact surface configured to contact an aerosol-generated article received in the cavity.

[0022] The contact surface may be smooth. Alternatively, the contact surface may have a friction-increasing surface structure that increases friction between the contact surface and the received aerosol-generating article to aid in the retention of the aerosol-generating article within the cavity.

[0023] For example, the contact surface may be curved to match the shape of the outer periphery of the aerosol-generating article. The contact surface may be curved to form a concave or convex surface for contacting the aerosol-generating article. This can improve the contact between the contact surface and the aerosol-generating article. Improved contact between the contact surface and the aerosol-generating article can facilitate the sensing operation of the sensing device. As will be described in more detail below, the contact surface may include, be part of, or form part of the sensing device. The matching shape between the contact surface and the outer periphery of the aerosol-generating article can further prevent damage to the aerosol-generating article within the cavity.

[0024] The radially inward-facing contact surface can be configured to hold an aerosol-generating article, including an aerosol-forming matrix, within the cavity.

[0025] The radially inward-facing contact surface may include a coating, preferably a gold coating. This coating may be conductive. The coating can improve the electrical contact between the outer periphery of the aerosol-generating article and the sensing device.

[0026] Protruding elements, including radially inwardly facing contact surfaces, can be configured as electrodes. Electrodes can be part of a sensing device. Electrodes can be electrically connected to the sensing device. Coatings can be configured as electrodes. As will be described in more detail below, electrodes enable the measurement of the electrical characteristics (e.g., resistance) of one or more corresponding identification elements arranged on the outer periphery of the aerosol-generating article, and thus enable, for example, the identification of the type of aerosol-generating article or the received aerosol-generating article. Alternatively or concurrently, electrodes can be configured to preferably measure the temperature of the outer periphery of the aerosol-generating article by measuring the resistance of the electrodes. The resistance of the electrodes can change according to the temperature of the corresponding electrodes, such that the measurement of the electrode resistance enables the determination of the electrode temperature. Since the electrodes are in contact with the outer periphery of the aerosol-generating article, the temperature of the electrodes can indicate the temperature of the outer periphery of the aerosol-generating article.

[0027] The protruding element, including the radially inward-facing contact surface, can be configured as a capacitive sensing element, preferably having a dielectric constant different from that of ambient air. The contact surface can be configured as a capacitive sensing element. The capacitive sensing element facilitates capacitive coupling between the sensing device and the outer periphery of the aerosol-generating article. As will be described in more detail below, the outer periphery of the aerosol-generating article may include one or more corresponding identification elements, which enable, for example, identification of the type of aerosol-generating article or the type of aerosol-generating article received.

[0028] Only one of the protruding elements may be part of the sensing device. Alternatively, more than one, but not all, of the protruding elements may be part of the sensing device. As another alternative, each of the protruding elements may be part of the sensing device.

[0029] The distance between the radially inward contact surfaces of the protruding element can be reduced in the distal direction.

[0030] When the aerosol-generating article is received in the cavity, this facilitates its secure retention. Specifically, as the aerosol-generating article is further pushed into the cavity, the retaining effect on the aerosol-generating article can be increased due to the reduced distance between the protruding elements. In other words, the aerosol-generating article can be sandwiched between the protruding elements and thus securely held by them. The reduced distance between the protruding elements means that the aerosol-generating article can be easily inserted into the cavity, while during further insertion, it can be securely held between the protruding elements and thus within the cavity.

[0031] The distance between the radially inward contact surfaces of the opposing protruding elements can be reduced from a distance greater than the outer diameter of the aerosol-generating article to a distance corresponding to or less than the outer diameter of the aerosol-generating article, in order to help retain the aerosol-generating article in the cavity.

[0032] Alternatively, at least a portion of one or more of the protrusions (e.g., one or more electrodes) may be biased inward in the radial direction. This can help to grip the aerosol-generating article.

[0033] The distance between the opposing radially inward contact surfaces of the protruding element can be between 5 mm and 9 mm, preferably between 6 mm and 8 mm, and more preferably between 6.5 mm and 7.2 mm.

[0034] The distance between the opposing protruding elements can be between 0.5 mm and 2.0 mm, preferably between 0.7 mm and 1.6 mm, and more preferably between 0.9 mm and 1.3 mm.

[0035] The width of one or more protruding elements may be between 0.2 mm and 1.6 mm, preferably between 0.4 mm and 1.3 mm, and more preferably between 0.6 mm and 1.0 mm. The proximal portion of the radially inward-facing contact surface may be chamfered or bent to facilitate the insertion of the aerosol-generating article.

[0036] The proximal portion of the radially inward-facing contact surface can form the inlet of the cavity. Therefore, this inlet can be configured to allow easy insertion of the aerosol-generating article into the cavity. In other words, the retention of the aerosol-generating article within the cavity can be applied by the contact surface of the protruding element remote from the cavity inlet. The proximal portion of the radially inward-facing contact surface may not exert a retention effect on the aerosol-generating article. The proximal portion of the radially inward-facing contact surface can form a guide inlet for inserting the aerosol-generating article into the cavity.

[0037] The longitudinal side surface of the protruding element may have a positive draft angle.

[0038] The longitudinal side surface of the protruding element can abut against the contact surface of the protruding element. The longitudinal side surface of the protruding element can connect the contact surface of the protruding element to the cavity wall. The longitudinal side surface of the protruding element can connect the contact surface of the protruding element to the base of the protruding element.

[0039] A positive draft angle can help in manufacturing protruding elements through injection molding.

[0040] The positive draft angle can be between 0.5° and 10°, preferably between 1° and 5°, and more preferably between 1.5° and 2.5°.

[0041] The aerosol generating device may also include an air inlet arranged near the proximal end of the adjacent cavity.

[0042] An air inlet can be located near the proximal end of the cavity. The air inlet can be annular. It can be located adjacent to and within the proximal end of the cavity. The air inlet allows ambient air to be drawn into the aerosol generating device, particularly into the cavity of the aerosol generating device, via the proximal end of the apparatus.

[0043] The aerosol generating device may not have additional air inlets. In particular, no orifices or other air inlets may be provided at the base of the cavity, on the side wall of the housing of the aerosol generating device, or at the distal end of the aerosol generating device.

[0044] The airflow channel can be fluidly connected to the air inlet. The airflow channel can be located downstream of the air inlet. The airflow channel can also be located distal to the air inlet.

[0045] When the aerosol-generating article is received in the cavity, the airflow channel can be arranged between the inner wall of the cavity and the outer periphery of the aerosol-generating article. Furthermore, the opposite sidewalls of the sidewall channel can be provided by protruding elements.

[0046] The airflow channel may include a U-shaped bend at the base of the adjacent cavity, allowing ambient air to be drawn into the cavity through an air inlet and further into the airflow channel, subsequently entering the interior of the aerosol generating article through the distal end face. For this purpose, the outer periphery of the aerosol generating article may be fluid-impermeable, or at least the airflow through the outer periphery may be reduced. Apart from the airflow through the distal end face, the only relevant airflow entering the aerosol generating article may be through perforations located in the ventilation area of ​​the aerosol generating article.

[0047] Protruding elements can be arranged on the outer periphery of the cavity.

[0048] This is an alternative configuration where a protruding element is provided on the inner wall of the cavity. In this alternative configuration, the inner wall of the cavity is preferably smooth, so that the aerosol-generated article is placed flush against the inner wall of the cavity.

[0049] The protruding element can extend radially outward.

[0050] The protruding element can be mounted or attached to the outer periphery of the cavity. Alternatively, the protruding element can be integrally formed with the outer periphery of the cavity.

[0051] The inner wall of the cavity can be smooth to achieve a tight fit between the cavity and the received aerosol-generated article.

[0052] An air inlet can be formed between the outer periphery of the cavity and the outer periphery of the housing of the aerosol generating device. In other words, in this configuration, the air inlet can be arranged outside the cavity to match different arrangements of the airflow channels.

[0053] The protruding element can be elongated. The shape of the protruding element can be similar to or the same as the shape described above with respect to the first consistent configuration (in which the protruding element is arranged to project radially inward from the cavity). Exemplarily, the protruding element can have a positive draft angle to facilitate the manufacture of the protruding element via injection molding.

[0054] The protruding element can be made of a conductive material.

[0055] The protruding element can be made of stainless steel, preferably 316L stainless steel.

[0056] Four or more, or at least six, preferably at least eight, preferably at least ten, and most preferably at least twelve protruding elements may be provided.

[0057] The number of protruding elements can be between 4 and 18, between 6 and 18, preferably between 8 and 16, more preferably between 10 and 14, and most preferably 12.

[0058] This number of protruding elements facilitates the secure retention of aerosol-generated articles within the cavity.

[0059] The airflow channel can extend to the base of the cavity.

[0060] The airflow passage may include a U-shaped bend at the base of the cavity.

[0061] The protruding element can be positioned in the proximal portion of the cavity. Positioning the protruding element in the proximal portion of the cavity helps to hold the aerosol-generated article in that location. This prevents the aerosol-generated article from shifting or sloshing around in the proximal portion of the cavity, which could be undesirable.

[0062] The cavity may include a holding element. The holding element may be configured to retain an aerosol-generating article within the cavity. This function of the holding element may be similar to the function of the protruding element described herein in retaining an aerosol-generating article. The holding element may complement the protruding element to together securely retain the aerosol-generating article within the cavity. Alternatively, the holding element may retain the aerosol-generating article within the cavity independently.

[0063] The retaining element may include retaining protrusions configured to retain the aerosol generating article when received in the cavity. When the aerosol generating article is received in the cavity, the retaining protrusions may contact the aerosol generating article. The retaining protrusions may include contact surfaces configured to contact the aerosol generating article. The contact surfaces may have a shape matching the shape of the outer periphery of the aerosol generating article. Opposing contact surfaces may be spaced apart such that the distance between opposing contact surfaces is similar to or slightly smaller than the outer diameter of the aerosol generating article.

[0064] The retaining protrusion can extend radially inward from the inner wall of the cavity.

[0065] The retaining protrusion can be positioned at the distal portion of the cavity. As described herein, the protruding element can be positioned at the proximal portion of the cavity. Thus, the aerosol-generating article can be securely held within the cavity by contacting the proximal portion of the cavity with the protruding element and by contacting the retaining protrusion at the distal portion of the cavity.

[0066] The aerosol generating apparatus may also include a heating element configured for heating an aerosol forming matrix received in the cavity.

[0067] The heating element can be configured as an induction heating element. The induction heating element may include an induction coil. The induction coil may be a helical induction coil. The induction coil may be arranged around the cavity.

[0068] The heating element can be positioned on the far side of the protruding element.

[0069] The heating element can be arranged to at least partially, preferably completely, surround the cavity.

[0070] The heating element can be arranged between the protruding element and the retaining protrusion.

[0071] The heating element may include a sensor. The sensor may be tubular. The tubular sensor may be disposed between a proximal protruding element and a distal retaining protrusion. Alternatively, and preferably, the sensor may be disposed within the aerosol generating article. Exemplarily, the sensor may be disposed as a strip within the aerosol generating article. In this case, the heating element of the aerosol generating apparatus preferably includes an induction coil arranged to surround a portion of the aerosol generating article with the sensor disposed therein when the aerosol generating article is received in the cavity.

[0072] The protruding element may include a heating element.

[0073] The heating element of the protruding element can be provided as a supplement to or alternative to the (main) heating element of the aerosol generating apparatus. When the aerosol generating article is received in the cavity, the heating element of the protruding element can optimally transfer heat to the aerosol generating apparatus due to the adjacent contact between the protruding element and the outer periphery of the aerosol generating article. Alternatively, the heating element of the protruding element can be configured to preheat the ambient air being drawn through the airflow channel adjacent to the protruding element. This preheating of the air flowing through the airflow channel can improve aerosol generation when this preheated air enters the aerosol generating article and is subsequently heated by the main heating element of the aerosol generating apparatus.

[0074] The heating element of the prominent component can be a resistance heating element.

[0075] A heating element for the protruding element can be formed at the contact surface of the protruding element. The contact surface of the protruding element can be configured as a heating element. For example, the contact surface of the protruding element can be a resistance heater. For this purpose, the contact surface of the protruding element can be made of a conductive material such as metal.

[0076] Alternatively, the contact surface of the protruding element can be configured as a sensor to achieve inductive heating. An induction coil can be arranged around the cavity and the protruding element to generate eddy currents within the sensor to facilitate heating of the sensor.

[0077] The heating element can be configured to preheat ambient air drawn through the air inlet and into the airflow channel adjacent to the protruding element.

[0078] If preheating of the ambient air is the primary or sole objective of the heating element of the protruding element, the heating element of the protruding element can be arranged on the side wall directly adjacent to the airflow channel of the protruding element, rather than on the contact surface of the protruding element.

[0079] As an alternative, the heating element can be located at the contact surface of the protruding element to heat the aerosol-generated article, and the heating element can be arranged on the side wall of the protruding element to preheat the ambient air drawn through the airflow channel.

[0080] Heating elements may contain sensor materials.

[0081] The aerosol generating device also includes induction coils arranged around the heating element.

[0082] The heating element can be configured as a resistance heating element.

[0083] The sensing device can be configured as a product sensor.

[0084] The product sensor can be configured to detect the presence of aerosol-generated products.

[0085] The sensing device or article sensor can be configured to classify aerosol-generating articles received in a cavity. The sensing device or article sensor can be configured to classify aerosol-generating articles by determining that they are one of several different types of aerosol-generating articles; that is, the article sensor can be configured to perform "article classification." The sensing device or article sensor can be configured to classify aerosol-generating articles based on one or more colored bands on a portion of the outer surface of the aerosol-generating article. Each colored band may include visible ink.

[0086] The sensing device or article sensor can be configured to authenticate aerosol-generated articles received in a cavity. The sensing device or article sensor can be configured to authenticate aerosol-generated articles by determining that the aerosol-generated article matches data corresponding to genuine aerosol-generated articles of one or more storage types; that is, the article sensor can be configured to perform "article authentication." The sensing device or article sensor can be configured to classify aerosol-generated articles based on one or more markers on a portion of the outer surface of the aerosol-generated article. Each marker may include invisible ink.

[0087] As described herein, in one embodiment, the contact surface of the protruding element is configured as an electrode or capacitive sensing element that directly contacts the outer periphery of the aerosol generating article when it is received in the cavity. The outer periphery of the aerosol generating article may include one or more identification elements arranged to directly contact the electrodes of the protruding element. The electrodes of the protruding element can then measure the resistance of the identification element of the aerosol generating article, which can indicate the presence of the aerosol generating article and possibly the type of aerosol generating article inserted. If the identification element of the aerosol generating article is configured as a capacitive marker, this capacitive marker can be arranged to directly contact, be adjacent to, approach, or pass through the capacitive sensing element of the sensing device of the aerosol generating apparatus, thereby enabling the detection of the presence of the aerosol generating article and possibly the type of aerosol generating article.

[0088] In alternative and particularly preferred embodiments, one or both of article classification and article certification are facilitated as described below.

[0089] The sensing device may include one or more optical sensors.

[0090] The sensing device may include one or more optical transmitters.

[0091] The sensing device may include an optical sensor configured to detect light in the visible spectrum.

[0092] The sensing device may include an optical emitter configured to emit light in the visible spectrum.

[0093] The sensing device may include an optical sensor configured to detect light in the invisible spectrum.

[0094] The sensing device may include an optical emitter configured to emit light in the invisible spectrum.

[0095] One or more of the optical sensor and the optical transmitter can be arranged in the protruding element.

[0096] The protruding element may include one or more windows, which are preferably arranged at the radially inward contact surface of the protruding element. The one or more windows may be transparent.

[0097] The sensor can be configured to detect light received through the window.

[0098] The transmitter can be configured to emit light through a window.

[0099] The first sensor-emitter pair may be located behind a first window within the window. The first sensor-emitter pair may include a first sensor configured to sense light in the visible spectrum and a first emitter configured to emit light in the visible spectrum. The controller of the aerosol generation apparatus may be configured to classify aerosol-generated articles based on the light received by the first sensor. The light received by the first sensor may be light in the visible spectrum emitted by the first emitter and reflected from one or more colored portions of the aerosol-generated article.

[0100] The aerosol generating article may include two or more colored strips, preferably an outer packaging, that substantially define the outer surface of the aerosol generating article. The colored strips may be positioned on the aerosol generating article such that, when the aerosol generating article is inserted into a cavity, each colored strip passes through a sensing device, preferably through a first sensor-transmitter pair. Based on analysis of the detected strip colors, the controller may determine which specific type of aerosol generating article is inserted depending on the color of the color-coded region.

[0101] The second sensor-emitter pair may be located behind a second window within the window. The second sensor-emitter pair may include a second sensor configured to sense light in the invisible spectrum and a second emitter configured to emit light in the invisible spectrum. The controller may be configured to authenticate the aerosol-generated article based on the light received by the second sensor. The light received by the second sensor may be light in the invisible spectrum emitted by the second emitter and reflected from one or more portions of the aerosol-generated article, each portion including a marker (each portion preferably including invisible ink).

[0102] The aerosol-generating article may include one or more invisible ink strips, preferably outer packaging, that substantially define a portion of the outer surface of the aerosol-generating article. The invisible ink strips may be positioned on the aerosol-generating article such that when the aerosol-generating article is inserted into the cavity of the aerosol-generating device, each strip passes through a sensing device, preferably a second sensor-transmitter pair. Based on the analysis of the detected invisible ink strips, the controller may determine whether the aerosol-generating article is genuine.

[0103] The sensing device can be configured for one or more of the following: product presence detection, product classification, and product certification.

[0104] The sensing device can be configured to detect the type of aerosol-generated article received in the cavity.

[0105] The sensing device can be configured to detect the presence of aerosol-generating articles in the chamber.

[0106] The protruding elements may have varying thicknesses. One or more protruding elements may have a thickness different from that of the one or more different protruding elements. Alternatively or additionally, one or more protruding elements may have varying thicknesses along the longitudinal length of the corresponding protruding element in the air.

[0107] The airflow channel can have a diameter of 0.8 mm. 2 With 4.0 mm 2 The total cross-sectional area between them.

[0108] The protruding element may have a trapezoidal shape. The protruding element may have a trapezoidal cross-section. The wider end of the protruding element may form the base of the protruding element. The narrower end of the protruding element may form the contact surface of the protruding element.

[0109] Protruding elements can be manufactured by metal stamping, metal bending, or metal plating.

[0110] Metal stamping is a manufacturing process in which metal foil is pressed into a suitable shape, such as the shape of a protruding element, in a single stamping operation. Similar to metal stamping, metal bending is the process of deforming metal when force is applied, causing it to bend at an angle and form a desired shape, such as the shape of a protruding element. Metal stamping and metal bending are preferred manufacturing processes for producing protruding elements. Metal plating is a chemical manufacturing process in which a plastic part is immersed in a chemical bath to form a thin layer of metallic coating.

[0111] Manufacturing may include the following process steps: metal stamping of the protruding element using a frame having two strips on the sides, each of the two strips including a hole; during the assembly step, the entire frame moves linearly on a device dedicated to assembly; due to the presence of the holes, the position of the portion (primarily the protruding element) is better controlled; furthermore, the holes are configured to synchronize with the speed of the device, and once the protruding element is in place, a vertical cutter operates to separate the protruding element from the frame; finally, high-speed mechanical "fingers" push the protruding element into the cavity of a tubular component, which can then serve as the cavity of an aerosol generating device.

[0112] The present invention also relates to an aerosol generation system comprising an aerosol generation apparatus according to any one of the preceding claims, and an aerosol generation article comprising an aerosol forming matrix.

[0113] Aerosol-generated articles may include identification elements.

[0114] The identification element can be arranged on or adjacent to the outer periphery of the aerosol-generating article.

[0115] The identification element can be a metal strip.

[0116] When the aerosol-generated article is received in the cavity of the aerosol-generating device, the identification element can be arranged to be adjacent to or in direct contact with the protruding element.

[0117] The identification element can be a conductive element. The resistance of the identification element can indicate the type of aerosol-generated product.

[0118] The identification element can be a capacitive identification element. The capacitive identification element can be configured to capacitively couple to the capacitive sensing element of the sensing device when the capacitive identification element is arranged to directly contact, approach, or pass by the capacitive sensing element of the sensing device. This capacitive coupling can be used to identify one or more of the presence of an aerosol generating device or the type of aerosol generating device.

[0119] The present invention also relates to a method for manufacturing a protruding element of a cavity in an aerosol generating apparatus, the method comprising: providing a cavity in the aerosol generating apparatus, the cavity being configured to receive an aerosol generating article comprising an aerosol forming matrix; providing a protruding element extending in a radial direction for the cavity, wherein airflow channels may be formed between the protruding elements. The protruding element may include at least a portion of a sensing device.

[0120] The present invention also relates to a method for manufacturing a protruding element of a cavity in an aerosol generating apparatus, the method comprising: providing a cavity in the aerosol generating apparatus, the cavity being configured to receive an aerosol generating article comprising an aerosol forming matrix; and providing a protruding element extending in a radial direction for the cavity, wherein airflow channels are formed between the protruding elements. The protruding element includes at least a portion of a sensing device.

[0121] Protruding elements can be manufactured by metal stamping, metal bending, or metal plating.

[0122] As used herein, the terms “proximal,” “distal,” “upstream,” and “downstream” are used to describe the relative position of a component or part of a component of an aerosol generating device with respect to the direction in which it is drawn by a user during use of the aerosol generating device.

[0123] An aerosol generating device may include an orifice through which aerosols exit the aerosol generating device and are delivered to the user during use. The orifice may also be referred to as a proximal end. During use, the user inhales through the proximal end or orifice of the aerosol generating device to inhale the aerosol generated by the aerosol generating device. Alternatively, the user may inhale directly through an aerosol-generating article inserted into an opening at the proximal end of the aerosol generating device. The opening at the proximal end may be an opening of a cavity. The cavity may be configured to receive the aerosol-generating article. The aerosol generating device includes a distal end opposite the proximal end or orifice. The proximal end or orifice of the aerosol generating device may also be referred to as a downstream end, and the distal end of the aerosol generating device may also be referred to as an upstream end. Components or portions of components of the aerosol generating device may be described as upstream or downstream of each other based on their relative position between the proximal end, downstream end, or orifice of the aerosol generating device and the distal end or upstream end.

[0124] As used herein with reference to this invention, the term "smoking" in relation to apparatus, articles, systems, matrix, or otherwise does not refer to conventional smoking in which the aerosol-forming matrix is ​​completely or at least partially burned. The aerosol-generating apparatus of the present invention is arranged to heat the aerosol-forming matrix to a temperature below the combustion temperature of the aerosol-forming matrix but at or above the temperature at which one or more volatile compounds of the aerosol-forming matrix are released to form an inhalable aerosol.

[0125] The aerosol generating device may include a circuit system. The circuit system may include a microprocessor, which may be a programmable microprocessor. The microprocessor may be part of a controller. The circuit system may include additional electronic components. The circuit system may be configured to regulate the power supply to a heating element. Power may be continuously supplied to the heating element after the aerosol generating device is activated, or it may be supplied intermittently, such as based on inlet-out suction. Power may be supplied to the heating element in the form of current pulses. The circuit system may be configured to monitor the resistance of the heating element and preferably control the power supply to the heating element based on the resistance of the heating element.

[0126] The circuit system can also be electrically connected to a sensing device. The circuit system can be configured to detect aerosol-generating articles based on the output of the sensing device. The circuit system can be configured to prevent aerosol generation if no aerosol-generating article is detected. The circuit system can be configured to detect the type of inserted aerosol-generating article based on the output of the sensing device. The circuit system can be configured to prevent aerosol generation if a specific type or one of several specific types of aerosol-generating articles is not detected. The circuit system can be configured to apply one of several heating profiles depending on the type of aerosol-generating article detected. For example, the circuit system can be configured to apply a first heating profile to a detected first type of aerosol-generating article and can be configured to apply a second heating profile to a detected second type of aerosol-generating article.

[0127] If the prominent element includes a heating element, the circuit system can be configured to control the electrical energy supply from the power source to the heating element.

[0128] The aerosol generating device may include a power source, typically a battery, within the body of the device. In one embodiment, the power source is a lithium-ion battery. Alternatively, the power source may be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery such as a lithium-cobalt, lithium-iron-phosphate, lithium titanate, or lithium-polymer battery. Alternatively, the power source may be another form of charge storage device, such as a capacitor. The power source may require recharging and may have a capacity sufficient to store enough energy for one or more uses; for example, the power source may have sufficient capacity to continuously generate aerosols for periods of approximately six minutes or multiples of six minutes. In another instance, the power source may have sufficient capacity to provide a predetermined number of discontinuous activations of the suction or heating element.

[0129] In any aspect of this disclosure, the heating element may comprise a resistive material. Suitable resistive materials include, but are not limited to: semiconductors (such as doped ceramics), electrically “conductive” ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic and metallic materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, platinum, gold, and silver. Examples of suitable metal alloys include stainless steel, nickel-containing alloys, cobalt-containing alloys, chromium-containing alloys, aluminum-containing alloys, titanium-containing alloys, zirconium-containing alloys, hafnium-containing alloys, niobium-containing alloys, molybdenum-containing alloys, tantalum-containing alloys, tungsten-containing alloys, tin-containing alloys, gallium-containing alloys, manganese-containing alloys, gold-containing alloys, iron-containing alloys, and superalloys based on nickel, iron, cobalt, stainless steel, Timetal®, and iron-manganese-aluminum based alloys. In composite materials, the resistive material may optionally be embedded in, encapsulated by, or coated with an insulating material, or vice versa, depending on the energy transfer kinetics and desired external physicochemical properties.

[0130] As described, in any aspect of the invention, the heating element may be part of an aerosol generating apparatus. The aerosol generating apparatus may include an internal heating element, an external heating element, or both, wherein “internal” and “external” refer to the aerosol forming matrix. The internal heating element may take any suitable form. For example, the internal heating element may take the form of a heating blade. Alternatively, the internal heater may take the form of a sleeve or substrate with different conductive portions, or a resistive metal tube. Alternatively, the internal heating element may be one or more heating needles or rods extending through the center of the aerosol forming matrix. Other alternatives include heating wires or filaments, such as Ni-Cr (nickel-chromium), platinum, tungsten, or alloy wires, or heating plates. Optionally, the internal heating element may be deposited in or on a rigid carrier material. In one such embodiment, the resistance heating element may be formed using a metal having a defined relationship between temperature and resistivity. In such exemplary devices, the metal may be formed as a track on a suitable insulating material (such as a ceramic material) and then sandwiched in another insulating material (such as glass). Heaters formed in this way can be used to both heat and monitor the temperature of the heating element during operation.

[0131] The external heating element can take any suitable form. For example, it can take the form of one or more flexible heating foils on a dielectric substrate (such as polyimide). The flexible heating foil can be shaped to conform to the periphery of the matrix receiving cavity. Alternatively, the external heating element can take the form of a metal mesh or multiple metal meshes, a flexible printed circuit board, a molded interconnect device (MID), a ceramic heater, a flexible carbon fiber heater, or can be formed on a suitable shaped substrate using coating techniques (such as plasma vapor deposition). The external heating element can also be formed using a metal with a defined relationship between temperature and resistivity. In such an exemplary device, the metal can be formed as a track between two suitable insulating materials. An external heating element formed in this way can be used to both heat and monitor the temperature of the external heating element during operation.

[0132] As an alternative to resistance heating elements, heating elements can be configured as induction heating elements. Induction heating elements can include an induction coil and a sensor. Generally, the sensor is a material capable of generating heat when penetrated by an alternating magnetic field. When located in an alternating magnetic field, if the sensor is conductive, eddy currents are typically induced by the alternating magnetic field. If the sensor is magnetic, another effect that typically contributes to heating is often referred to as hysteresis loss. Hysteresis loss occurs primarily due to the movement of magnetic domain blocks within the sensor, as the magnetic orientation of these domain blocks aligns with the alternating magnetic induction field. Another effect contributing to hysteresis loss is when magnetic domains will grow or shrink within the sensor. Typically, all these changes occurring in the sensor at the nanoscale or below are referred to as "hysteresis loss" because they generate heat within the sensor. Therefore, if the sensor is both magnetic and conductive, both hysteresis loss and eddy current generation contribute to heating the sensor. If the sensor is magnetic but non-conductive, hysteresis loss will be the only means of heating the sensor when penetrated by an alternating magnetic field. According to the invention, the sensor can be conductive or magnetic, or both. An alternating magnetic field generated by one or more induction coils heats the sensor, which then transfers the heat to the aerosol-forming matrix, causing aerosol formation. Heat transfer can be primarily via thermal conduction. This heat transfer is optimal if the sensor is in close thermal contact with the aerosol-forming matrix. As described herein, the sensor can be arranged between a protruding element and a retaining protrusion.

[0133] As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming matrix capable of releasing volatile compounds that can form aerosols. For example, an aerosol-generating article can be a smoking article that generates aerosols that can be directly inhaled into the lungs of a user through their mouth. Aerosol-generating articles can be disposable.

[0134] As used herein, the term "aerosol forming matrix" refers to a matrix capable of releasing one or more volatile compounds that can form aerosols. Such volatile compounds can be released by heating the aerosol forming matrix. The aerosol forming matrix may suitably be part of an aerosol-generating article or a smoking article.

[0135] The aerosol forming matrix can be a solid aerosol forming matrix. It can include both solid and liquid components. The aerosol forming matrix can include tobacco-containing materials containing volatile tobacco flavor compounds released from the matrix upon heating. The aerosol forming matrix can also include non-tobacco materials. It can include aerosol forming agents that facilitate the formation of dense and stable aerosols. Examples of suitable aerosol forming agents are glycerol and propylene glycol.

[0136] The aerosol-generating matrix preferably comprises: homogenized tobacco material, an aerosol forming agent, and water. Providing homogenized tobacco material can improve aerosol generation, nicotine content, and aroma characteristics of aerosols generated during the heating of aerosol-generating articles. Specifically, the process of manufacturing homogenized tobacco involves grinding tobacco leaves, which more effectively releases nicotine and aroma upon heating.

[0137] The following is a non-exhaustive list of non-limiting examples. Any one or more features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein.

[0138] Example 1. An aerosol generating apparatus, the aerosol generating apparatus comprising: a cavity configured to receive an aerosol forming matrix; wherein the cavity includes protruding elements extending in a radial direction, wherein airflow channels are formed between the protruding elements, wherein the protruding elements include at least a portion of a sensing device.

[0139] Example 2. The aerosol generating apparatus according to Example 1, wherein the protruding element is configured as a rib.

[0140] Example 3. An aerosol generating apparatus according to any of the preceding examples, wherein the protruding element is arranged on the inner wall of the cavity.

[0141] Example 4. An aerosol generating apparatus according to any of the preceding examples, wherein the protruding element extends radially inward.

[0142] Example 5. An aerosol generating apparatus according to any of the foregoing examples, wherein each of the protruding elements includes a radially inward contact surface configured to contact an aerosol generating article received in the cavity.

[0143] Example 6. An aerosol generating apparatus according to Example 5, wherein the radially inwardly facing contact surface is configured to hold the aerosol generating article comprising the aerosol forming matrix in the cavity.

[0144] Example 7. An aerosol generating apparatus according to Example 5 or 6, wherein the radially inward contact surface comprises a coating, preferably a gold coating.

[0145] Example 8. An aerosol generating apparatus according to any one of Examples 5 to 7, wherein the protruding element of the radially inward contact surface is configured as an electrode.

[0146] Example 9. An aerosol generating apparatus according to any one of Examples 5 to 7, comprising the protruding element of the radially inward contact surface configured as a capacitive sensing element having a dielectric constant different from that of ambient air.

[0147] Example 10. An aerosol generating apparatus according to any one of Examples 5 to 9, wherein the distance between the radially inward contact surfaces of the protruding element decreases in the distal direction.

[0148] Example 11. An aerosol generating apparatus according to Example 10, wherein the distance is reduced from a distance greater than the outer diameter of the aerosol generating article to a distance corresponding to or less than the outer diameter of the aerosol generating article, in order to help retain the aerosol generating article in the cavity.

[0149] Example 12. An aerosol generating apparatus according to Example 10 or 11, wherein the distance between the opposing radially inward contact surfaces of the protruding element is between 5 mm and 9 mm, preferably between 6 mm and 8 mm, and more preferably between 6.5 mm and 7.2 mm.

[0150] Example 13. An aerosol generating apparatus according to any of the foregoing examples, wherein the distance between opposing protruding elements is between 0.5 mm and 2.0 mm, preferably between 0.7 mm and 1.6 mm, and more preferably between 0.9 mm and 1.3 mm.

[0151] Example 14. An aerosol generating apparatus according to any one of Examples 5 to 10, wherein the proximal portion of the radially inward contact surface is chamfered or bent to facilitate insertion of the aerosol generating article.

[0152] Example 15. An aerosol generating apparatus according to any one of Examples 5 to 14, wherein the longitudinal side surface of the protruding element has a positive draft angle.

[0153] Example 16. The aerosol generating apparatus according to Example 15, wherein the positive draft angle is between 0.5° and 10°, preferably between 1° and 5°, and more preferably between 1.5° and 2.5°.

[0154] Example 17. An aerosol generating apparatus according to any of the foregoing examples, wherein the aerosol generating apparatus further includes an air inlet arranged proximal to the cavity.

[0155] Example 18. An aerosol generating apparatus according to Example 17, wherein the airflow channel is fluidly connected to the air inlet.

[0156] Example 19. An aerosol generating apparatus according to Example 17 or 18, wherein the air inlet is formed between the inner wall of the cavity and the aerosol generating article received in the cavity.

[0157] Example 20. An aerosol generating apparatus according to Example 1 or 2, wherein the protruding element is arranged on the outer periphery of the cavity.

[0158] Example 21. An aerosol generating apparatus according to Example 20, wherein the protruding element extends radially outward.

[0159] Example 22. An aerosol generating apparatus according to Example 20 or 21, wherein the inner wall of the cavity is smooth to achieve a tight fit between the cavity and the received aerosol-generated article.

[0160] Example 23. An aerosol generating apparatus according to any one of Examples 17 or 18 and Examples 20 to 22, wherein the air inlet is formed between the outer periphery of the cavity and the outer periphery of the housing of the aerosol generating apparatus.

[0161] Example 24. An aerosol generating apparatus according to any of the preceding examples, wherein the protruding element is elongated.

[0162] Example 25. An aerosol generating apparatus according to any of the foregoing examples, wherein the protruding element is made of a conductive material.

[0163] Example 26. An aerosol generating apparatus according to any of the foregoing examples, wherein the protruding element is made of stainless steel, preferably 316L stainless steel.

[0164] Example 27. An aerosol generating apparatus according to Example 17 or 18, wherein the air inlet is annular.

[0165] Example 28. An aerosol generating apparatus according to any of the preceding examples, wherein at least 6, preferably at least 8, preferably at least 10, and most preferably at least 12 protruding elements are provided.

[0166] Example 29. An aerosol generating apparatus according to any of the foregoing examples, wherein the number of protruding elements is between 6 and 18, preferably between 8 and 16, more preferably between 10 and 14, and most preferably 12.

[0167] Example 30. An aerosol generating apparatus according to any of the foregoing examples, wherein the airflow channel extends to the base of the cavity.

[0168] Example 31. An aerosol generating apparatus according to any of the preceding examples, wherein the airflow channel includes a U-shaped bend at the base of the cavity.

[0169] Example 32. An aerosol generating apparatus according to any of the preceding examples, wherein the protruding element is arranged in the proximal portion of the cavity.

[0170] Example 33. An aerosol generating apparatus according to any of the foregoing examples, wherein the cavity includes a holding element.

[0171] Example 34. An aerosol generating apparatus according to Example 33, wherein the holding element includes a holding protrusion configured to hold the aerosol generating article when it is received in the cavity.

[0172] Example 35. An aerosol generating apparatus according to Example 34, wherein the retaining protrusion extends radially inward from the inner sidewall of the cavity.

[0173] Example 36. An aerosol generating apparatus according to Example 33 or 34, wherein the retaining protrusion is disposed at the distal portion of the cavity.

[0174] Example 37. An aerosol generating apparatus according to any of the foregoing examples, wherein the aerosol generating apparatus further includes a heating element configured to heat an aerosol forming matrix received in the cavity.

[0175] Example 38. An aerosol generating apparatus according to Example 37, wherein the heating element is configured as an induction heating element.

[0176] Example 39. An aerosol generating apparatus according to Example 37 or 38, wherein the heating element is arranged distal to the protruding element.

[0177] Example 40. An aerosol generating apparatus according to any one of Examples 37 to 39, wherein the heating element is arranged to at least partially, preferably completely, surround the cavity.

[0178] Example 41. An aerosol generating apparatus according to any one of Examples 37 to 40 and Example 36, wherein the heating element is arranged between the protruding element and the retaining protrusion.

[0179] Example 42. An aerosol generating apparatus according to any of the foregoing examples, wherein the protruding element includes a heating element.

[0180] Example 43. An aerosol generating apparatus according to Example 17 or 18 and Example 42, wherein the heating element is configured to preheat ambient air drawn through the air inlet and into the airflow channel adjacent to the protruding element.

[0181] Example 44. An aerosol generating apparatus according to Example 42 or 43, wherein the heating element comprises a sensor material.

[0182] Example 45. An aerosol generating apparatus according to any one of Examples 42 to 44, wherein the aerosol generating apparatus further includes an induction coil arranged around the heating element.

[0183] Example 46. An aerosol generating apparatus according to Example 42 or 43, wherein the heating element is configured as a resistance heating element.

[0184] Example 47. An aerosol generating apparatus according to any of the foregoing examples, wherein the sensing device is configured as a product sensor.

[0185] Example 48. An aerosol generating apparatus according to any of the preceding examples, wherein the sensing device includes one or more optical sensors.

[0186] Example 49. An aerosol generating apparatus according to any of the preceding examples, wherein the sensing device includes one or more optical emitters.

[0187] Example 50. An aerosol generating apparatus according to any of the preceding examples, wherein the sensing device includes an optical sensor configured to detect light in the visible spectrum.

[0188] Example 51. An aerosol generating apparatus according to any of the preceding examples, wherein the sensing device includes an optical emitter configured to emit light in the visible spectrum.

[0189] Example 52. An aerosol generating apparatus according to any of the preceding examples, wherein the sensing device includes an optical sensor configured to detect light in the invisible spectrum.

[0190] Example 53. An aerosol generating apparatus according to any of the preceding examples, wherein the sensing device includes an optical emitter configured to emit light in the invisible spectrum.

[0191] Example 54. A generating apparatus according to any one of Examples 48 to 53, wherein one or more of the optical sensor and the optical emitter are arranged in the protruding element.

[0192] Example 55. An aerosol generating apparatus according to any of the preceding examples, wherein the protruding element includes one or more windows, the one or more windows preferably being arranged at a radially inward contact surface of the protruding element.

[0193] Example 56. An aerosol generating apparatus according to Example 55, wherein the sensor of any one of Examples 48 to 54 is configured to detect light received through the window.

[0194] Example 57. An aerosol generating apparatus according to Example 55 or 56, wherein the emitter of any one of Examples 48 to 54 is configured to emit light through the window.

[0195] Example 58. An aerosol generating apparatus according to any one of Examples 48 to 57, wherein a first sensor-emitter pair is located behind a first window in a window, preferably wherein the first sensor-emitter pair includes a first sensor configured to sense light in the visible spectrum and a first emitter configured to emit light in the visible spectrum, more preferably wherein a controller is configured to classify aerosol-generated articles based on light received by the first sensor.

[0196] Example 59. An aerosol generating apparatus according to any one of Examples 48 to 58, wherein a second sensor-emitter pair is located behind a second window in a window, preferably wherein the second sensor-emitter pair includes a second sensor configured to sense light in the invisible spectrum and a second emitter configured to emit light in the invisible spectrum, more preferably wherein the controller is configured to authenticate the aerosol generating article based on the light received by the second sensor.

[0197] Example 60. An aerosol generating apparatus according to any of the foregoing examples, wherein the sensing device is configured for one or more of article presence detection, article classification, and article certification.

[0198] Example 61. An aerosol generating apparatus according to any of the foregoing examples, wherein the sensing device is configured to detect the type of aerosol generating article received in the cavity.

[0199] Example 62. An aerosol generating apparatus according to any of the foregoing examples, wherein the sensing device is configured to detect the presence of an aerosol generating article in the cavity.

[0200] Example 63. An aerosol generating apparatus according to any of the preceding examples, wherein the protruding element has a varying thickness.

[0201] Example 64. An aerosol generating apparatus according to any of the foregoing examples, wherein the airflow channel has a diameter of 0.8 mm. 2 With 4.0 mm 2 The total cross-sectional area between them.

[0202] Example 65. An aerosol generating apparatus according to any of the preceding examples, wherein the protruding element has a trapezoidal shape.

[0203] Example 66. An aerosol generating apparatus according to any of the preceding examples, wherein the protruding element is made by metal stamping, metal bending or metal plating.

[0204] Example 67. An aerosol generation system comprising an aerosol generation apparatus according to any of the foregoing examples and an aerosol generation article comprising an aerosol forming matrix.

[0205] Example 68. An aerosol generation system according to Example 67, wherein the aerosol generation article includes an identification element.

[0206] Example 69. An aerosol generation system according to Example 68, wherein the identification element is arranged on or adjacent to the outer periphery of the aerosol generation article.

[0207] Example 70. An aerosol generation system according to Example 68 or 69, wherein the identification element is a metal strip.

[0208] Example 71. An aerosol generation system according to any one of Examples 68 to 70, wherein when the aerosol generation article is received in the cavity of the aerosol generation apparatus, the identification element is arranged adjacent to or in direct contact with the protruding element.

[0209] Example 72. An aerosol generating system according to any one of Examples 68 to 71, wherein the identification element includes one or more colored portions on the outer surface of the aerosol generating article.

[0210] Example 73. An aerosol generating system according to Example 72, wherein each colored portion includes a colored band defining the outer surface of the aerosol generating article.

[0211] Example 74. An aerosol generation system according to any one of Examples 68 to 73, wherein the identification element includes one or more markers on a portion of the outer surface of the aerosol generation article.

[0212] Example 75. An aerosol generation system according to Example 74, wherein each marker includes an invisible ink band defining the outer surface of the aerosol-generated article.

[0213] Example 76. A method for manufacturing a protruding element of a cavity in an aerosol generating apparatus, comprising: providing a cavity in the aerosol generating apparatus, the cavity being configured to receive an aerosol generating article comprising an aerosol forming matrix; providing a protruding element extending in a radial direction for the cavity, wherein airflow channels are formed between the protruding elements, wherein the protruding element includes at least a portion of a sensing device.

[0214] Example 77. According to the method of Example 76, the protruding element is manufactured by metal stamping, metal bending or metal plating.

[0215] The features described with respect to one embodiment can also be applied to other embodiments of the invention.

[0216] The invention will be further described by way of example only with reference to the accompanying drawings, in which: FIG1 shows a side sectional view of an aerosol generating apparatus having an inserted aerosol generating article; FIG2 shows a more detailed view of the elements of the cavity of the aerosol generating apparatus; FIG3 shows a detailed view of the protruding element of the cavity; FIG4 shows a detailed view of an alternative embodiment of the protruding element; FIG5 shows the arrangement of the protruding element in the sidewall of the cavity; FIG6 shows a separate protruding element; FIG7 shows a frame with two strips used during the manufacture of the protruding element; FIG8 shows the protruding element inserted into the sidewall of the cavity; and FIGS. 9A to 9C show embodiments of the aerosol generating apparatus having a first section with a sensing device.

[0217] Figure 1 shows an aerosol generating apparatus 10, more specifically the proximal portion of the aerosol generating apparatus 10. An aerosol generating article 12 is inserted into a cavity 14 of the aerosol generating apparatus 10. Figure 1 further indicates sections of the cavity 14. A protruding element 18 is arranged in a first section 16. Heating of the aerosol forming matrix 22 of the aerosol generating article 12 occurs in a second section 20, and a retaining protrusion 26 is arranged in a third section 24. The protruding element 18 and the retaining protrusion 26 are described below with reference to additional figures.

[0218] Figure 1 also illustrates the airflow entering the aerosol generating apparatus 10, within the cavity 14, into the aerosol generating article 12, and passing through the aerosol generating article 12. More specifically, when the aerosol generating article 12 is inserted into the cavity 14, an air inlet 38 is located at the proximal end of the cavity 14 and between the side wall 34 of the cavity 14 and the outer periphery of the aerosol generating article 12. Subsequently, ambient air flows in a distal direction through an airflow channel 40 formed between the side surfaces 36 of the protruding element 18. The airflow channel 40 is described in more detail with respect to the figures described below. Near the distal end of the cavity 14, the air makes a U-turn and is drawn into the distal surface of the aerosol generating article 12. The air then travels through the aerosol generating article 12. As it travels through the aerosol forming matrix 22 of the aerosol generating article 12, the vaporized aerosol forming matrix 22 is entrained in the airflow. The aerosol forming matrix 22 of the aerosol generating article 12 is vaporized by means of the heating element 28 of the heating aerosol generating apparatus 10. Further downstream, an aerosol is generated by mixing ambient air with air traveling through the aerosol generating article 12. The mixing of ambient air is facilitated by perforations 42 provided in the outer periphery of the aerosol generating article 12, more specifically in the ventilation section 44 of the aerosol generating article 12. When the aerosol generating article 12 is arranged in the cavity 14, the ventilation section 44 of the aerosol generating article 12 is preferably arranged outside the cavity 14 so that ambient air can be directly drawn into the ventilation section 44. Finally, the generated aerosol exits the aerosol generating article 12 near its end face and can be inhaled by the user.

[0219] Figure 2 shows a more detailed view of the protruding element 18 of the cavity 14 of the aerosol generating apparatus 10. More specifically, the protruding element 18 is shown in the first section 16 (indicated in Figure 1). The protruding element 18 is configured as an integral part of the cavity 14 (more specifically, the proximal portion of the cavity 14). The protruding element 18 protrudes inward. In other words, the protruding element 18 protrudes toward the longitudinal central axis of the cavity 14. As a result, when the aerosol generating article 12 is inserted into the cavity 14, the inward-facing contact surface 30 (described in more detail with reference to the additional figures) is the most inward-facing portion of the protruding element 18 and will contact the outer periphery of the aerosol generating article 12. The inward-facing configuration of the protruding element 18 is shown in more detail in Figure 3, described below, while an alternative configuration of the protruding element 18 (in which the protruding element 18 protrudes outward) is shown in Figure 4, described below.

[0220] At the distal end of the first segment 16, a heating element 28 (arranged in the second segment 20 shown in FIG. 1) is shown. The heating element 28 is configured as an induction heater, preferably a tubular sensor. To accomplish induction heating, the aerosol generating apparatus 10 includes an induction coil surrounding the heating element. The induction coil is not shown. Alternatively, the heating element 28 is configured as a resistance heater, preferably configured as a heating trace printed onto a polyimide substrate.

[0221] Alternatively, the heating element 28 may include a sensor as part of the aerosol generating article 12 (e.g., a sensor strip embedded in the aerosol forming matrix of the aerosol generating article). In this example, the aerosol generating device 10 includes an induction coil surrounding the aerosol generating article 12 (once the aerosol generating article is inserted into the cavity 14) for heating the sensor of the aerosol generating article.

[0222] The heating element 28 may be arranged around the second section 20 of the cavity 14, or may form the sidewall 34 of the cavity 14 in the region of the second section 20.

[0223] A retaining protrusion 26 is disposed in the distal portion of the cavity 14. The retaining protrusion 26 is configured as an inwardly facing protrusion so as to contact the outer periphery of the aerosol generating article 12 when it is inserted into the cavity 14. Thus, the aerosol generating article 12 is securely held in the cavity 14 by means of the gripping action of the protruding element 18 in the proximal portion of the cavity 14 and by means of the retaining protrusion 26 in the distal portion of the cavity 14.

[0224] Figure 3 shows the inward-facing configuration of the protruding element 18 in more detail. Additionally, in the embodiment shown in Figure 3, the protruding element 18 is integrally formed with the cavity 14 or more precisely with the sidewall 34 of the cavity 14. However, it should be appreciated that the protruding element 18 can alternatively be configured as a separate element and attached to the inner sidewall 34 of the cavity 14.

[0225] Figure 3 also shows a preferred embodiment of the protruding elements 18, wherein the nearest side portion of each respective protruding element 18 is provided with a chamfer 32. The chamfer 32 facilitates the insertion of the aerosol generating article 12 by guiding it to a central position within the cavity 14.

[0226] Figure 3 also shows the positive draft angle of the protruding element 18. More specifically, the side surface 36 of the protruding element 18 is provided with a positive draft angle.

[0227] Airflow channels 40 are formed between the individual protruding elements 18. Thus, when the aerosol generating article 12 is received in the cavity 14, airflow channels 40 are formed between the inner wall 34 of the cavity 14, the side surface 36 of the adjacent protruding elements 18, and the outer periphery of the aerosol generating article 12.

[0228] Figure 4 shows an alternative configuration of the protruding element 18. More specifically, in this configuration, the protruding element 18 is arranged as a radially outward-facing protruding element 18. In this configuration, the protruding element 18 is arranged on the outer periphery of the cavity 14, and the protrusion extends in a radially outward direction. The inner sidewall 34 of the cavity 14 is smooth to achieve a tight fit of the aerosol-generating article 12 within the cavity 14.

[0229] Therefore, the airflow channel 40 is arranged on the outside of the cavity 14. The airflow channel 40 is formed between the outer periphery of the cavity 14, the side surface 36 of the adjacent protruding element 18, and the outermost portion. The outermost portion may be the housing of the aerosol generating device 10 or an internal portion of the aerosol generating device 10. The internal portion may be a dedicated wall or different element used to form the airflow channel 40, such as a heat insulation wall.

[0230] Figure 5 shows the configuration of the inwardly facing protruding element 18. Unlike Figure 3, the protruding element 18 is not integrally formed with the cavity 14. Instead, the protruding element 18 is a separate element inserted into a groove 46 arranged in the sidewall 34 of the cavity 14, such that only the inwardly facing portion of the protruding element 18 actually protrudes into the cavity 14. The groove 46 securely holds the protruding element 18 in place.

[0231] Figure 6 shows a more detailed view of the single protruding element 18 used in the embodiment of Figure 5. The portion of the protruding element 18 that actually protrudes into the cavity 14 has a triangular shape. Therefore, the proximal portion of this portion of the protruding element 18 has a chamfer 32 to allow the aerosol generating article 12 to be inserted into the cavity 14. Additionally, the apex of the triangular shape is configured as a contact surface 30 to contact the outer periphery of the aerosol generating article 12 when it is inserted into the cavity 14. The contact surface 30 is preferably part of a sensing device. Alternatively, the contact surface 30 may be configured as a heating element.

[0232] When the contact surface 30 is part of the sensing device, the contact surface 30 can be configured as an electrode. This can be particularly advantageous if the aerosol generating article 12 is provided with an identification element. The sensing device can be configured to measure the resistance of the identification element of the aerosol generating article 12 when it is received in the cavity 14. More specifically, the identification element can be arranged on the outer periphery of the aerosol generating article 12 such that one or more electrodes of the protruding element 18 contact the identification element. Electrical contact can then be established between adjacent electrodes of the protruding element 18 via the identification element of the aerosol generating article 12. Therefore, applying a voltage between adjacent electrodes of the protruding element 18 makes it possible to measure the resistance of the identification element.

[0233] As an alternative to configuring the contact surface 30 as an electrode or configuring it to have electrodes, the contact surface 30 may be provided with a capacitance sensing element. This is advantageous if the identification element of the aerosol generating article 12 is a corresponding capacitance identification element. When the aerosol generating article 12 is received in the cavity 14, the capacitance identification element may be arranged adjacent to or move past the capacitance contact surface 30 of the protruding element 18. In this case, the sensing device can detect the capacitive coupling between the capacitance contact surface 30 of the protruding element 18 and the capacitance identification element of the aerosol generating article 12.

[0234] Regardless of whether the corresponding contact surface 30 of the sensing device and the protruding element 18 is configured as an electrode or as a capacitive sensor, the sensing device can be configured to detect the presence of the aerosol generating article 12, the type of the received aerosol generating article 12, or both.

[0235] In a particularly preferred embodiment of the first segment 16 shown in Figures 9A to 9C, the first segment 16 includes or is configured as a sensing device capable of article classification and article authentication as described herein. In this embodiment, the sensing device is preferably a modular segment attachable to the proximal end of the aerosol generating apparatus 10. The sensing device may include a proximal portion 52 and a distal portion 54, which are slidably attached during assembly. A sealing element (not shown) may be arranged between the proximal portion 52 and the distal portion 54. The distal portion 54 may include a cutout portion 64 for mounting a sensor. The sensing device includes a sensing portion 56 of the cavity 12. The sensing device includes a sensor sidewall 58 surrounding the sensing portion 56 of the cavity 12. The sensor sidewall 58 extends coaxially about a longitudinal central axis 60 of the cavity 12.

[0236] The protruding element 18 of the first segment 16 may include one or more windows 62, which are preferably arranged at the radially inward contact surface 30 of the protruding element 18. The windows may be transparent. The windows 62 are spatially arranged between the sensor of the sensing device (not shown in Figures 9A to 9C) and the sensing portion 56 of the cavity 12. The windows 62 protrude into the sensing portion 56 of the cavity 14. Specifically, compared to the remainder of the sensor sidewall 58 at the longitudinal position of the window 62, the window 62 protrudes laterally into the interior of the cavity 14 toward the longitudinal central axis 60 of the cavity 14. The window 62 is made of a material transparent to the wavelength used by the sensor.

[0237] As best seen in Figure 9C, the sensor sidewall 58 has a substantially flat planar shape at the location of the window 62, and a curved shape in the portion of the sensor sidewall 58 adjacent to the window 62. The sensor sidewall 58 has a predominantly circular cross-section in the longitudinal position of the window 62. However, the window 62 is substantially flat. This ensures improved contact between the outer periphery of the aerosol generating article 12 and the window 62, resulting in improved sensor function during the insertion and removal of the aerosol generating article 12 and self-cleaning of the window 62.

[0238] The first sensor-emitter pair (not shown in Figures 9A to 9C) may be located behind the first window in window 62. The first sensor-emitter pair may include a first sensor configured to sense light in the visible spectrum and a first emitter configured to emit light in the visible spectrum. The controller of the aerosol generating apparatus 10 may be configured to classify the aerosol generating article 12 based on the light received by the first sensor. The light received by the first sensor may be light in the visible spectrum emitted by the first emitter and reflected from one or more colored portions of the aerosol generating article 12.

[0239] A second sensor-emitter pair (not shown in Figures 9A to 9C) may be located behind a second window in window 62. The second sensor-emitter pair may include a second sensor configured to sense light in the invisible spectrum and a second emitter configured to emit light in the invisible spectrum. A controller may be configured to authenticate the aerosol-generating article 12 based on the light received by the second sensor. The light received by the second sensor may be light in the invisible spectrum emitted by the second emitter and reflected from one or more portions of the aerosol-generating article 12, each portion including a marker (each portion preferably including invisible ink).

[0240] As described herein, the protruding element 18 can therefore have a dual function. The first function of the protruding element 18 can be to securely hold the aerosol-generating article 12 within the cavity 14. The second function of the protruding element 18 can be a sensing function.

[0241] In addition to or as an alternative to the functions of the protruding element 18 described herein, the contact surface of the protruding element 18 may be configured as a heating element or may include a heating element. As another addition or alternative, the side surface 36 of the protruding element 18 may be provided with a heating element. Providing a heating element at the contact surface 30 or at the side surface 36 of the protruding element 18 allows for the preheating of ambient air drawn through the airflow channel 40 adjacent to the side surface 36 of the protruding element 18. This may be particularly advantageous if only the side surface 36 of the protruding element 18 is provided with a heating element. Providing a heating element to the contact surface 30 of the protruding element 18 may be advantageous if heating of the aerosol generating article 12, more preferably the aerosol forming matrix 22 of the aerosol generating article 12, is preferred. The arrangement of heating elements at the protruding element 18 can be used to heat one or both of the aerosol generating article 12, particularly the aerosol forming matrix 22 of the aerosol generating article 12, and the ambient air drawn through the airflow channel 40 adjacent to the side surface 36 of the protruding element 18.

[0242] Figure 7 illustrates the fabrication of the protruding element 18. Fabrication may include metal stamping of the protruding element 18 using a frame having two strips 48 on its sides, each of the two strips including a hole 50; during the assembly step, the entire frame moves linearly on a device dedicated to assembly; due to the presence of the holes 50, the position of the portion (primarily the protruding element 18) is better controlled; furthermore, the holes 50 are configured to synchronize with the speed of the device, and once the protruding element 18 is in place, a vertical cutter (not shown) operates to separate the protruding element 18 from the frame; finally, a high-speed mechanical "finger" pushes the protruding element 18 into the cavity 14 of the tubular component, which can then serve as the cavity 14 of the aerosol generating device 10. The individual protruding elements 18 can then be formed as shown in Figure 6. The individual final protruding elements 18 arranged in the cavity 14 can be arranged as shown in Figure 5.

[0243] Figure 8 shows the insertion of the protruding element 18 into the slot 46 of the sidewall 34 of the cavity 14. After the protruding element 18 is inserted into the slot 46, the final arrangement of the protruding element 18 can be as shown in Figure 5.

Claims

1. An aerosol generating apparatus, the aerosol generating apparatus comprising: A cavity configured to receive aerosol-formed matrix; The cavity includes protruding elements extending in a radial direction, wherein airflow channels are formed between the protruding elements, and the protruding elements include at least a portion of the sensing device.

2. The aerosol generating apparatus according to claim 1, wherein the protruding element is configured as a rib.

3. The aerosol generating apparatus according to any one of the preceding claims, wherein the protruding element is disposed on the inner wall of the cavity.

4. The aerosol generating apparatus according to any one of the preceding claims, wherein each of the protruding elements includes a radially inward contact surface configured to contact an aerosol generating article received in the cavity.

5. The aerosol generating apparatus according to claim 4, wherein the radially inward contact surface is configured to hold the aerosol-generated article in the cavity.

6. The aerosol generating apparatus according to claim 4 or 5, wherein the radially inward contact surface includes one or more windows.

7. The aerosol generating apparatus of claim 6, wherein the first sensor-emitter pair is located behind a first window in the window, preferably, wherein the first sensor-emitter pair includes a first sensor configured to sense light in the visible spectrum and a first emitter configured to emit light in the visible spectrum, more preferably, wherein the controller of the aerosol generating apparatus is configured to classify aerosol generating articles comprising the aerosol forming matrix based on the light received by the first sensor.

8. The aerosol generating apparatus according to claim 6 or 7, wherein the second sensor-emitter pair is located behind a second window in the window, preferably wherein the second sensor-emitter pair comprises a second sensor configured to sense light in the invisible spectrum and a second emitter configured to emit light in the invisible spectrum, more preferably wherein the controller is configured to authenticate the aerosol generating article based on the light received by the second sensor.

9. The aerosol generating apparatus according to claim 4 or 5, wherein the radially inward contact surface comprises a coating, preferably a gold coating.

10. The aerosol generating apparatus according to any one of claims 4 to 6, wherein the protruding element of the radially inward contact surface is configured as an electrode.

11. The aerosol generating apparatus according to any one of claims 4 to 6, wherein the protruding element of the radially inward contact surface is configured as a capacitive sensing element having a dielectric constant different from that of ambient air.

12. The aerosol generating apparatus according to any one of the preceding claims, wherein the protruding element is made of a conductive material.

13. The aerosol generating apparatus according to any one of the preceding claims, wherein the protruding element is disposed in the proximal portion of the cavity.

14. The aerosol generating apparatus according to any one of the preceding claims, wherein the sensing device is configured as an article sensor.

15. The aerosol generating apparatus according to any one of the preceding claims, wherein the sensing device is configured to detect the type of aerosol-generated article received in the cavity.

16. The aerosol generating apparatus according to any one of the preceding claims, wherein the sensing device is configured to detect the presence of the aerosol generating article in the cavity.

17. An aerosol generation system, the aerosol generation system comprising an aerosol generation apparatus according to any one of the preceding claims and an aerosol generation article comprising an aerosol forming matrix.

18. A method for manufacturing a protruding element of a cavity in an aerosol generating apparatus, comprising: A cavity is provided in an aerosol generating apparatus, the cavity being configured to receive an aerosol generating article comprising an aerosol forming matrix, and protruding elements extending in a radial direction are provided for the cavity, wherein airflow channels are formed between the protruding elements, wherein the protruding elements include at least a portion of a sensing device.

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