EP4680058A1

EP4680058A1 - Aerosol-generating device with induction and airflow control

Info

Publication number: EP4680058A1
Application number: EP24709764.5A
Authority: EP
Inventors: Rui Nuno Rodrigues Alves BATISTA; Charlotte Barbara WESTENBERG
Original assignee: Philip Morris Products SA
Current assignee: Philip Morris Products SA
Priority date: 2023-03-15
Filing date: 2024-03-11
Publication date: 2026-01-21
Also published as: WO2024188949A1; CN120835759A; JP2026508985A; KR20250154411A

Abstract

The invention relates to an aerosol-generating device comprising an induction heating assembly. The induction heating assembly comprises an induction coil (16) and at least one electrical contact arranged to slidingly contact the induction coil (16). The aerosol-generating device further comprises an air inlet (28) configured to allow ambient air to be drawn into the aerosol-generating device. The aerosol-generating device further comprises an inlet cover (26) configured to adjust a cross-sectional area of the air inlet (28). The aerosol-generating device further comprises an actuation element (24). The actuation element (24) is mechanically connected to the electrical contact and to the inlet cover (26). The actuation element (24) is configured, upon actuation, to slide the contact along the induction coil (16) and to actuate the inlet cover (26) so as to adjust the cross-sectional area of the air inlet (28). The invention further relates to an aerosol-generating system comprising the aerosol-generating device and an aerosol-generating article comprising aerosol-forming substrate. The invention further relates to a method for operating the aerosol-generating device.

Description

AEROSOL-GENERATING DEVICE WITH INDUCTION AND AIRFLOW CONTROL

The present invention relates to an aerosol-generating device.

It is known to provide an aerosol-generating device for generating an inhalable vapor. Such devices may heat aerosol-forming substrate to a temperature at which one or more components of the aerosol-forming substrate are volatilised without burning the aerosolforming substrate. Aerosol-forming substrate may be provided as part of an aerosolgenerating article. The aerosol-generating article may have a rod shape for insertion of the aerosol-generating article into a cavity, such as a heating chamber, of the aerosol-generating device. A induction coil may be arranged in or around the heating chamber for heating the aerosol-forming substrate once the aerosol-generating article is inserted into the heating chamber of the aerosol-generating device.

It would be desirable to have an aerosol-generating device with improved adaptability of the operation. It would be desirable to have an aerosol-generating device with improved adaptability of an intake of ambient air. It would be desirable to have an aerosol-generating device with improved adaptability of a heating of portions of the aerosol-forming substrate.

According to an embodiment of the invention there may be provided an aerosolgenerating device that may comprise an induction heating assembly. The induction heating assembly may comprise an induction coil and at least one electrical contact arranged to slidingly contact the induction coil. The aerosol-generating device may further comprise an air inlet that may be configured to allow ambient air to be drawn into the aerosol-generating device. The aerosol-generating device may further comprise an inlet cover that may be configured to adjust a cross-sectional area of the air inlet. The aerosol-generating device may further comprise an actuation element. The actuation element may be mechanically connected to the electrical contact and to the inlet cover. The actuation element may be configured, upon actuation, to slide the contact along the induction coil and to actuate the inlet cover so as to adjust the cross-sectional area of the air inlet.

According to an embodiment of the invention there is provided an aerosol-generating device comprising an induction heating assembly. The induction heating assembly comprises an induction coil and at least one electrical contact arranged to slidingly contact the induction coil. The aerosol-generating device further comprises an air inlet configured to allow ambient air to be drawn into the aerosol-generating device. The aerosol-generating device further comprises an inlet cover configured to adjust a cross-sectional area of the air inlet. The aerosol-generating device further comprises an actuation element. The actuation element is mechanically connected to the electrical contact and to the inlet cover. The actuation element is configured, upon actuation, to slide the contact along the induction coil and to actuate the inlet cover so as to adjust the cross-sectional area of the air inlet. Providing an electrical contact that can slide along the induction coil enables partial activation of the induction coil. Partial activation of the induction coil enables the creation of heating zones of variable size within the induction coil. Exemplarily, the electrical contact can be slided along the induction coil during operation of the aerosol-generating device or between individual parts of the user to heat more aerosol-forming substrate over time. As a consequence, fresh aerosol-forming substrate is heated during each puff of a user. The length of the heating zone may thus be gradually increased by sliding the slidable contact along the induction coil.

By providing the inlet cover configured to adjust the cross-sectional area of the air inlet, the airflow allowed into the aerosol-generating device can be adjusted. Particularly, during use of the aerosol-generating device, the aerosol-forming substrate of the aerosolgenerating article is gradually depleted. It may thus be desired to increase the airflow through the aerosol-generating article to maintain the amount of entrainment of vaporized aerosolforming substrate and thus to maintain a satisfactory aerosol generation.

The combination of sliding the slidable contact along the induction coil together with gradually increasing the cross-sectional shape of the air inlet may be particularly beneficial. The sliding of the slidable contact along the induction coil gradually increases the heating zone of the induction coil and thereby gradually heats more aerosol-forming substrate. At the same time, the gradually increase of the cross-sectional shape of the air inlet allows additional airflow into the aerosol-generating device thereby maintaining a satisfactory aerosol generation.

The actuation element may be configured to slide the slidable contact in a proximal direction. The actuation element may be configured to increase a heating zone of the induction coil during the sliding of the slidable contact in a proximal direction.

The actuation element may be configured to slide the inlet cover in a proximal direction. The actuation element may be configured to increase the cross-sectional shape of the air inlet during the sliding of the inlet cover in a proximal direction.

The inlet cover may be arranged on an outer periphery of the aerosol-generating device. A guiding element, preferably a guiding slot or a guiding protrusion, may be provided on the outer periphery of the aerosol-generating divide for facilitating a guided movement of the inlet cover. The guiding element may be arranged parallel to a longitudinal central axis of the aerosol-generating device.

The inlet cover may comprise a cover guide. The cover guide may be configured to be mounted at the guiding element so that a sliding movement of the inlet cover with respect to the guiding element is enabled. Exemplarily, the guiding element may comprise a slot and the cover guide may comprise a protrusion being slidably arranged within the slot. The induction coil may comprise a second electrical contact that may be fixedly connected with the induction coil.

The slidable contact may also be denoted as first electrical contact or as first slidable electrical contact. The second electrical contact may also be denoted as second fixed electrical contact. One or both of the first slidable electrical contact and the second fixed electrical contact may be connected with a power supply of the aerosol-generating device.

The inlet cover may be configured slidable over the air inlet to adjust a cross- sectional area of the air inlet.

The inlet cover may have a circular shape. The air inlet may have a circular cross- sectional shape. The outer diameter of the inlet cover may correspond to or may be larger than an inner diameter of the air inlet. In other words, the inlet cover may be dimensioned to be able to cover the air inlet thereby reducing or preventing airflow into the air inlet. During the sliding movement of the inlet cover, by means of the actuation element, airflow into the air inlet may gradually be enabled. The gradual enablement of airflow into the air inlet may be facilitated by the inlet cover gradually uncovering the air inlet during the sliding movement of the inlet cover.

The inlet cover as well as the air inlet may have alternative shapes. For example, the inlet cover may have an oval, elliptical or rectangular shape. The air inlet may have a corresponding overall, elliptical or rectangular cross-sectional shape.

The inlet cover may be arranged at the periphery of the aerosol-generating device.

The actuation element may be configured as a sliding button. The actuation element may be configured to be actuated by a user, more preferably by a digit of the user.

The actuation element may be configured as an electrically actuated element. In this embodiment, the actuation element may be arranged within the aerosol-generating device. In other words, the actuation element may be protected from outside influences by a housing of the aerosol-generating device as a manual activation of the actuation element is not necessary in this embodiment.

The aerosol-generating device may further comprise a controller. The controller may be configured to controller a sliding movement of the electrically actuated element based upon a usage profile of the aerosol-generating device.

The controller may control the actuation element to slide the first contact in a proximal direction during operation of the aerosol-generating device. The controller may control the actuation element to slide the inlet cover in a proximal direction during operation of the aerosol-generating device. Preferably, the controller controls the actuation element to slide the first contact and to slide the inlet cover in a proximal direction, respectively, at the same time. The controller may further be configured to control supply of electrical energy from the power supply to one or both of the first electrical contact and the second electrical contact.

The aerosol-generating device may further comprise a motor. The motor may be configured as an electric linear motor. The motor may be configured to slidingly move the electrically actuated element. The controller may control operation of the motor. The controller may be configured to control the supply of electrical energy from the power supply to the motor to power the motor.

The actuation element may be arranged at the periphery of the aerosol-generating device.

The aerosol-generating device may further comprise a cavity configured for receiving an aerosol-generating article may comprise aerosol-forming substrate.

The induction coil may be arranged at least partly surrounding the cavity.

The aerosol-generating device may further comprise a power supply, preferably a battery, for powering the induction coil.

The invention further relates to an aerosol-generating system comprising the aerosolgenerating device as described herein and an aerosol-generating article comprising aerosolforming substrate.

The aerosol-generating article may comprise a susceptor that may be configured to be heated by an alternating magnetic field generated by the induction coil of the aerosolgenerating device.

The invention further relates to a method for operating the aerosol-generating device as described herein. The method may comprise the following steps: sliding, by the actuation element, the electrical contact along the induction coil, and actuating, by the actuation element at the same time, the inlet cover to adjust a cross- sectional area of the air inlet.

As used herein, the terms ‘proximal’, ‘distal’, ‘downstream’ and ‘upstream’ are used to describe the relative positions of components, or portions of components, of the aerosolgenerating device in relation to the direction in which a user draws on the aerosol-generating device during use thereof.

The aerosol-generating device may comprise a mouth end through which in use an aerosol exits the aerosol-generating device and is delivered to a user. The mouth end may also be referred to as the proximal end. In use, a user draws on the proximal or mouth end of the aerosol-generating device in order to inhale an aerosol generated by the aerosolgenerating device. Alternatively, a user may directly draw on 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 the cavity. The cavity may be configured to receive the aerosol-generating article. The aerosol-generating device comprises a distal end opposed to the proximal or mouth end. The proximal or mouth end of the aerosol-generating device may also be referred to as the downstream end and the distal end of the aerosolgenerating device may also be referred to as the upstream end. Components, or portions of components, of the aerosol-generating device may be described as being upstream or downstream of one another based on their relative positions between the proximal, downstream or mouth end and the distal or upstream end of the aerosol-generating device.

As used herein, an ‘aerosol-generating device’ relates to a device that interacts with an aerosol-forming substrate to generate an aerosol. The aerosol-forming substrate may be part of an aerosol-generating article, for example part of a smoking article. An aerosolgenerating device may be a smoking device that interacts with an aerosol-forming substrate of an aerosol-generating article to generate an aerosol that is directly inhalable into a user’s lungs thorough the user's mouth. An aerosol-generating device may be a holder. The device may be an electrically heated smoking device. The aerosol-generating device may comprise a housing, electric circuitry, a power supply, a heating chamber and a induction coil.

As used herein with reference to the present invention, the term ‘smoking’ with reference to a device, article, system, substrate, or otherwise does not refer to conventional smoking in which an aerosol-forming substrate is fully or at least partially combusted. The aerosol-generating device of the present invention is arranged to heat the aerosol-forming substrate to a temperature below a combustion temperature of the aerosol-forming substrate, but at or above a temperature at which one or more volatile compounds of the aerosolforming substrate are released to form an inhalable aerosol.

The aerosol-generating device may comprise electric circuitry. The electric circuitry may comprise a microprocessor, which may be a programmable microprocessor. The microprocessor may be part of the controller. The electric circuitry may comprise further electronic components. The electric circuitry may be configured to regulate a supply of power to the induction coil. Power may be supplied to the induction coil continuously following activation of the aerosol-generating device or may be supplied intermittently, such as on a puff-by-puff basis. The power may be supplied to the induction coil in the form of pulses of electrical current.

The aerosol-generating device may comprise a power supply, typically a battery, within a main body of the aerosol-generating device. In one embodiment, the power supply is a Lithium-ion battery. Alternatively, the power supply may be a Nickel-metal hydride battery, a Nickel cadmium battery, or a Lithium based battery, for example a Lithium-Cobalt, a Lithium-lron-Phosphate, Lithium Titanate or a Lithium-Polymer battery. As an alternative, the power supply may be another form of charge storage device such as a capacitor. The power supply may require recharging and may have a capacity that enables to store enough energy for one or more usage experiences; for example, the power supply may have sufficient capacity to continuously generate aerosol for a period of around six minutes or for a period of a multiple of six minutes. In another example, the power supply may have sufficient capacity to provide a predetermined number of puffs or discrete activations of the induction coil.

The cavity of the aerosol-generating device may have an open end into which the aerosol-generating 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 closed end may be closed except for the provision of air apertures arranged in the base. The base of the cavity may be flat. The base of the cavity may be circular. The base of the cavity may be arranged upstream of the cavity. The open end may be arranged downstream of the cavity. The cavity may have an elongate extension. The cavity may have a longitudinal central axis. A longitudinal direction may be the direction extending between the open and closed ends along the longitudinal central axis. The longitudinal central axis of the cavity may be parallel to the longitudinal axis of the aerosol-generating device.

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

An airflow channel may run through the cavity. Ambient air may be drawn into the aerosol-generating device, into the cavity and towards the user through the airflow channel. Downstream of the cavity, a mouthpiece may be arranged or a user may directly draw on the aerosol-generating article. The airflow channel may extend through the mouthpiece.

In general, a susceptor is a material that is capable of generating heat, when penetrated by an alternating magnetic field generated by the induction coil. When located in an alternating magnetic field. If the susceptor is conductive, then typically eddy currents are induced by the alternating magnetic field. If the susceptor is magnetic, then typically another effect that contributes to the heating is commonly referred to hysteresis losses. Hysteresis losses occur mainly due to the movement of the magnetic domain blocks within the susceptor, because the magnetic orientation of these will align with the magnetic induction field, which alternates. Another effect contributing to the hysteresis loss is when the magnetic domains will grow or shrink within the susceptor. Commonly all these changes in the susceptor that happen on a nano-scale or below are referred to as “hysteresis losses”, because they produce heat in the susceptor. Hence, if the susceptor is both magnetic and electrically conductive, both hysteresis losses and the generation of eddy currents will contribute to the heating of the susceptor. If the susceptor is magnetic, but not conductive, then hysteresis losses will be the only means by which the susceptor will heat, when penetrated by an alternating magnetic field. According to the invention, the susceptor may be electrically conductive or magnetic or both electrically conductive and magnetic. An alternating magnetic field generated by one or several induction coils heat the susceptor, which then transfers the heat to the aerosol-forming substrate, such that an aerosol is formed. The heat transfer may be mainly by conduction of heat. Such a transfer of heat is best, if the susceptor is in close thermal contact with the aerosol-forming substrate.

As used herein, the term ‘aerosol-generating article’ refers to an article comprising an aerosol-forming substrate that is capable of releasing volatile compounds that can form an aerosol. For example, an aerosol-generating article may be a smoking article that generates an aerosol that is directly inhalable into a user’s lungs through the user's mouth. An aerosolgenerating article may be disposable.

As used herein, the term ‘aerosol-forming substrate’ relates to a substrate capable of releasing one or more volatile compounds that can form an aerosol. Such volatile compounds may be released by heating the aerosol-forming substrate. An aerosol-forming substrate may conveniently be part of an aerosol-generating article or smoking article.

The aerosol-forming substrate may be a solid aerosol-forming substrate. The aerosolforming substrate may comprise both solid and liquid components. The aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds which are released from the substrate upon heating. The aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may comprise an aerosol former that facilitates the formation of a dense and stable aerosol. Examples of suitable aerosol formers are glycerine and propylene glycol.

The aerosol-generating substrate preferably comprises homogenised tobacco material, an aerosol-former and water. Providing homogenised tobacco material may improve aerosol generation, the nicotine content and the flavour profile of the aerosol generated during heating of the aerosol-generating article. Specifically, the process of making homogenised tobacco involves grinding tobacco leaf, which more effectively enables the release of nicotine and flavours upon heating.

Features described in relation to one embodiment may equally be applied to other embodiments of the invention.

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

Figs. 1 A-1 E show an exemplary aerosol-generating device,

Figs. 2A-2D show further illustrations of the aerosol-generating device, Figs. 3A-3C show an embodiment of the aerosol-generating device with airflow control, and

Figs. 4A and 4B show an alternative embodiment of the aerosol-generating device.

Fig. 1 A shows an aerosol-generating device 10 having a cavity 12 configured for receiving an aerosol-generating article 14 comprising aerosol-forming substrate. The aerosol-generating device 10 comprises an induction coil 16 arranged surrounding a portion of the cavity 12. The cavity 12 is configured as a heating chamber. The induction coil 16 is configured to inductively heat a susceptor 18. The susceptor 18 may be part of the aerosolgenerating article 14 or may be arranged inside of the induction coil 16 as part of the aerosolgenerating device 10.

Fig. 1 B shows how the aerosol-generating article 14 can be inserted into the cavity 12 of the aerosol-generating device 10. Also, Fig. 1 B shows that the susceptor 18 is preferably arranged in the aerosol-generating article 14. The susceptor 18 is in this case preferably embedded in the aerosol-forming substrate such as to heat the aerosol-forming substrate when subjected to an alternating magnetic field from the induction coil 16. The susceptor 18 may have a length corresponding to a length of the induction coil 16. The length of the susceptor 18 may be measured along a longitudinal axis of the aerosol-generating article 14. The length of the induction coil 16 may be measured along a longitudinal axis of the aerosolgenerating device 10. The susceptor 18 may be flat. The susceptor 18 may be rectangular.

Fig. 1 B further shows a first electrical contact and a second electrical contact. The first electrical contact is configured slidable along the induction coil 16. The second electrical contact is fixed. This enables a partial activation of the induction coil 16 by sliding the first contact 20 along the induction coil 16 as shown in Figs. 1 C to 1 E. In these figures, the first contact 20 progressively slides along the induction coil 16 thereby activating gradually activating a larger portion of the induction coil 16. As a consequence, a gradually increasing heating zone is created inside of the induction coil 16. As shown in Figs. 1 C to 1 E, a corresponding larger part of the susceptor 18 is heated. This in turn means that more aerosol-forming substrate from the aerosol-generating article 14 is progressively heated when sliding the first contact 20 along the induction coil 16.

Fig. 2A shows the aerosol-generating article 14 surrounded by the induction coil 16. The first contact 20 is arranged connecting the induction coil 16 close to the second contact 22. Fig. 2B shows the corresponding configuration of the aerosol-generating article 14 inserted into the cavity 12 of the aerosol-generating device 10. The sliding of the first contact 20 is in this embodiment facilitated by an actuation element 24. The actuation element 24 is exemplarity depicted as a sliding button on the periphery of the aerosol-generating device 10. In Figs. 2C and 2D, the same elements are depicted. However, the actuation element 24 is actuated, more particularly slided parallel to a longitudinal axis of the aerosol-generating device 10, to slide the first contact 20 along the induction coil 16. As a consequence, a larger heating zone is created within the induction coil 16 and a larger part of the susceptor 18 of the aerosol-generating article 14 is heated.

Fig. 3 shows the preferred embodiment of the present invention. In this embodiment, the actuation element 24 has a double functionality. In addition to the previously described function of the actuation element 24 of sliding the first contact 20 along the induction coil 16, the actuation element 24 further slides an inlet cover 26 relative to an air inlet 28. The actuation element 24 is preferably integrally formed with the inlet cover 26 so that a sliding movement of the actuation element 24 leads to a sliding movement of the inlet cover 26.

The air inlet 28 is fluidly connected with the cavity 12. During operation, user drawing upon the aerosol-generating article 14 draws ambient air through the air inlet 28 into the cavity 12 and further through the aerosol-forming substrate of the aerosol-generating article 14. The inlet cover 26 is arranged to gradually slidingly cover the air inlet 28. In other words, the cross-sectional surface of the air inlet 28 can be adjusted by the sliding movement of the air inlet 28.

In Fig. 3A, the fist contact is arranged near the second contact 22. This is preferably the arrangement before the start of a user experience. The air inlet 28 is in this case fully covered to prevent ambient air from flowing into the air inlet 28. In Fig. 3B, a user experience has started. A sliding movement of the actuating element has moved the first contact 20 along the induction coil 16 in a proximal direction thereby increasing the portion of the induction coil 16 that is actuated. At the same time, the sliding movement of the actuation element 24 has partially uncovered the air inlet 28 by sliding the inlet cover 26 is a proximal direction as well. Finally, the air inlet 28 is fully uncovered in Fig. 3C thereby maximising airflow into the cavity 12. At the same time, a full sliding movement of the actuation element 24 has moved the first contact 20 to a proximal end of the induction coil 16 to fully actuate the induction coil 16 thereby heating the maximal amount of aerosol-forming substrate of the aerosol-generating article 14.

Fig. 4A shows an alternative embodiment in which a third contact 30 is not provided as a sliding contact. Instead, the third contact 30 is provided as a fixed contact. Additionally, multiple fourth contacts 32 are provided. All fourth contacts 32 are fixed contacts as well. To activate different portions of the induction coil 16, the actuation element 24 is configured to connect the third contact 30 and any one of the fourth contacts 32 with a power supply of the aerosol-generating device 10. An alternative is shown in Fig. 4B in which the multiple fourth contacts 32 can be either positive or negative contacts such that the connection is not limited to a combination of the third contact 30 with any one of the fourth contacts 32. Instead, any desired contact combination can be chosen to, for example, activate only an intermediate portion of the induction coil 16 or to heat subsequent segments of the induction coil 16. The embodiments of Figs. 4A and 4B are preferably combined with adjusting the inlet cover 26 as desired at the same time. For example, progressively more air may be allowed into the aerosol-generating device 10 during a user experience by progressively uncovering the air inlet 28 by means of the actuation element 24.

Claims

1 . An aerosol-generating device comprising: an induction heating assembly, the induction heating assembly comprising an induction coil and at least one electrical contact arranged to slidingly contact the induction coil, an air inlet configured to allow ambient air to be drawn into the aerosol-generating device, an inlet cover configured to adjust a cross-sectional area of the air inlet, and an actuation element, wherein the actuation element is mechanically connected to the electrical contact and to the inlet cover, and wherein the actuation element is configured, upon actuation, to slide the contact along the induction coil and to actuate the inlet cover so as to adjust the cross- sectional area of the air inlet.

2. The aerosol-generating device according to claim 1 , wherein the induction coil comprises a second electrical contact that is fixedly connected with the induction coil.

3. The aerosol-generating device according to any of the preceding claims, wherein the inlet cover is configured slidable over the air inlet to adjust a cross-sectional area of the air inlet.

4. The aerosol-generating device according to any of the preceding claims, wherein the inlet cover is arranged at the periphery of the aerosol-generating device.

5. The aerosol-generating device according to any of the preceding claims, wherein the actuation element is configured as a sliding button.

6. The aerosol-generating device according to any of claims 1 to 4, wherein the actuation element is configured as an electrically actuated element.

7. The aerosol-generating device according to claim 6, wherein the aerosolgenerating device further comprises a controller, and wherein the controller is configured to controller a sliding movement of the electrically actuated element based upon a usage profile of the aerosol-generating device.

8. The aerosol-generating device according to claim 6 or 7, wherein the aerosolgenerating device further comprises a motor, preferably an electric linear motor, and wherein the motor is configured to slidingly move the electrically actuated element.

9. The aerosol-generating device according to any of the preceding claims, wherein the actuation element is arranged at the periphery of the aerosol-generating device.

10. The aerosol-generating device according to any of the preceding claims, wherein the aerosol-generating device further comprises a cavity configured for receiving an aerosol-generating article comprising aerosol-forming substrate.

11. The aerosol-generating device according to claim 10, wherein the induction coil is arranged at least partly surrounding the cavity.

12. The aerosol-generating device according to any of the preceding claims, wherein the aerosol-generating device further comprises a power supply, preferably a battery, for powering the induction coil.

13. An aerosol-generating system comprising the aerosol-generating device according to any of the preceding claims and an aerosol-generating article comprising aerosol-forming substrate.

14. The aerosol-generating system of claim 13, wherein the aerosol-generating article comprises a susceptor configured to be heated by an alternating magnetic field generated by the induction coil of the aerosol-generating device.

15. A method for operating the aerosol-generating device of any according to any of claims 1 to 12, wherein the method comprises the following steps: sliding, by the actuation element, the electrical contact along the induction coil, and actuating, by the actuation element at the same time, the inlet cover to adjust a cross-sectional area of the air inlet.