Aerosol-generating device with suction prompting device

Abstract

The present invention relates to an aerosol-generating device comprising a heating element (32) configured to heat an aerosol-forming substrate. The aerosol-generating device further comprises a suction prompting device and a controller (34). The controller (34) is configured to control the suction prompt device to generate a suction prompt signal to a user when the heating element (32) has reached a predetermined preheating temperature (20) during a preheating phase (12) of the heating element (32). The invention also relates to a system and a method.

Description

Technical Field

[0001] The present invention relates to an aerosol generating device. The present invention also relates to a system and a method. Background Art

[0002] There is known an aerosol generating device for generating an inhalable vapor. Such a device can heat an aerosol-forming substrate to a temperature at which one or more components of the aerosol-forming substrate are volatilized without burning the aerosol-forming substrate. The aerosol-forming substrate 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 chamber (e.g., a heating chamber) of the aerosol generating device. A heating element can be arranged in or around the heating chamber so as to heat the aerosol-forming substrate once the aerosol-generating article is inserted into the heating chamber of the aerosol generating device. Environmental conditions can affect the quality of the generated aerosol. Particularly high humidity conditions can cause the aerosol-forming substrate to have a high humidity. Particularly low humidity conditions can cause the aerosol-forming substrate to have a low humidity. When inhaling the vaporized moisture in the aerosol-forming substrate during a first puff, the aerosol-forming substrate with high humidity can cause a "hot aerosol perception" effect. Summary of the Invention

[0003] There is a desire for an aerosol generating device having improved aerosol consistency. There is a desire for an aerosol generating device for preventing the "hot aerosol" effect. There is a desire for an aerosol generating device having a reduced humidity in a first generated aerosol puff.

[0004] According to an embodiment of the present invention, there is provided an aerosol generating device, which may include a heating element configured to heat an aerosol-forming substrate. The aerosol generating device may further include a puff indication device and a controller. The controller may be configured to control the puff indication device to generate a puff indication signal to the user when the heating element has reached a predetermined preheating temperature during a preheating stage of the heating element.

[0005] According to an embodiment of the present invention, there is provided an aerosol generating device, which includes a heating element configured to heat an aerosol-forming substrate. The aerosol generating device further includes a puff indication device and a controller. The controller is configured to control the puff indication device to generate a puff indication signal to the user when the heating element has reached a predetermined preheating temperature during a preheating stage of the heating element.

[0006] An aerosol generating device may be configured to generate an optimal aerosol under specific conditions. More specifically, the aerosol generating device may be configured to generate an optimal aerosol by heating an aerosol-forming substrate having a predefined moisture content. If the moisture content of the aerosol-forming substrate is higher than the predefined moisture content, the initial smoking experience may not be optimal. This problem can be overcome by providing a puffing cue device that generates a puffing cue signal to the user at a predefined preheating temperature of the heating element.

[0007] The puffing cue device is preferably constructed as a puffing cue element.

[0008] During the preheating phase of the heating element, the temperature of the heating element can be increased to a desired final heating temperature. If, for example, the moisture content of the aerosol-forming substrate is higher than the predefined moisture content (for which the aerosol generating device is optimized), the user's first puff may include a high vaporized water content. This can be unpleasant. By providing a puffing cue signal to the user during the preheating phase, the user can take a puff at this time during the preheating phase. The controller can be configured to control the puffing cue device to generate a puffing cue signal before the heating element reaches the final heating temperature at the end of the preheating phase. In other words, the term "during" can refer to the time before the end of the preheating phase. Thus, this puff can remove excess moisture from the aerosol-forming substrate. In particular, the excess moisture can be removed before the end of the preheating phase and before the heating element has reached its final heating temperature. Taking this puff during the preheating phase can prevent an unpleasant first puff for the user when the heating element has reached the final heating temperature, because only a limited amount of moisture will be vaporized during the puff when the heating element has reached the predefined preheating temperature during the preheating phase. In other words, the predefined preheating temperature (at which the puffing cue device generates a puffing cue signal) is selected such that the user's puff at this time removes potential excess moisture from the aerosol-forming substrate, while avoiding an unpleasant first puff for the user when the heating element has reached the final heating temperature.

[0009] The puffing cue device may include a vibration element. The puffing cue device can be a vibration element.

[0010] The vibration element can be configured to generate a tactile signal to the user as a puffing cue signal. The tactile signal can indicate to the user that the user should take a puff at this time to remove potential excess moisture from the aerosol-forming substrate during the preheating phase of the aerosol generating device.

[0011] The vibration element can be arranged at or near the periphery of the aerosol generating device. Thus, the user can experience tactile feedback via the finger holding the aerosol generating device.

[0012] The puffing cue device may include an acoustic element. The puffing cue device can be an acoustic element.

[0013] The acoustic component can be configured to generate an acoustic signal to the user as a puffing prompt signal. The acoustic signal can indicate to the user that the user should puff at this time to remove potential excess moisture from the aerosol-forming substrate during the preheating phase of the aerosol-generating device.

[0014] The puffing prompt device can include an optical element. The puffing prompt device can be the optical element.

[0015] The optical element can be configured to generate an optical signal to the user as a puffing prompt signal. The optical signal can indicate to the user that the user should puff at this time to remove potential excess moisture from the aerosol-forming substrate during the preheating phase of the aerosol-generating device.

[0016] The predetermined preheating temperature can be between 110 °C and 180 °C, preferably between 120 °C and 160 °C, more preferably between 130 °C and 150 °C, and most preferably 140 °C.

[0017] The aerosol-generating device can further include a temperature sensor. The temperature sensor can be configured to measure the temperature of the heating element. The controller can be configured to control the puffing prompt device based on the output of the temperature sensor.

[0018] Preferably, the controller can be configured to control the puffing prompt device to generate a puffing prompt signal when the temperature sensor detects that the heating element has reached the predetermined preheating temperature.

[0019] The temperature sensor can be configured to measure the temperature of the heating element by measuring the resistance of the heating element.

[0020] The preheating phase can start from the activation of the aerosol-generating device.

[0021] The preheating phase can have a duration of less than 60 seconds, preferably less than 50 seconds, more preferably less than 40 seconds, and most preferably less than 30 seconds.

[0022] The puffing prompt signal can be generated between 5 seconds and 30 seconds after the start of the preheating phase, preferably between 10 seconds and 20 seconds after the start of the preheating phase.

[0023] The heating temperature of the heating element can be higher than 200 °C, preferably higher than 220 °C, more preferably higher than 230 °C, more preferably higher than 235 °C, and most preferably about 235 °C.

[0024] The controller can be configured to control the puffing prompt device to generate a puffing ready signal to the user when the heating element may have reached the heating temperature.

[0025] The draw ready signal may signal the end of the preheating phase. The draw ready signal may signal to the user that an initial draw can be made and that excess moisture has been removed from the aerosol - forming substrate by drawing during the preheating phase. The initial draw represents the first draw of a desired smoking experience and does not include the initial draw during the preheating phase.

[0026] The draw ready signal may be different from the draw cue signal such that the user can distinguish between the draw cue signal and the draw ready signal. Exemplarily, if the draw cue signal is a tactile signal as described herein, the draw ready signal may be a different tactile signal, or may be an acoustic signal, or may be an optical signal. If the draw cue signal is an acoustic signal as described herein, the draw ready signal may be a different acoustic signal, or may be a tactile signal, or may be an optical signal. If the draw cue signal is an optical signal as described herein, the draw ready signal may be a different optical signal, or may be a tactile signal, or may be an acoustic signal.

[0027] The draw cue signal may include one or more of the following: a vibration signal, a tactile signal, an acoustic signal, and an optical signal.

[0028] The present invention also relates to an aerosol - generating system comprising an aerosol - generating device as described herein and an aerosol - generating article comprising an aerosol - forming substrate.

[0029] The present invention also relates to a method for removing excess moisture from an aerosol - forming substrate in an aerosol - generating device as described herein. The method may comprise:

[0030] When the heating element may have reached a predetermined preheating temperature during the preheating phase of the heating element, controlling, via the controller, the draw cue device to generate a draw cue signal to the user.

[0031] As used herein, the terms "proximal", "distal", "upstream" and "downstream" are used to describe the relative position of components or parts of an aerosol - generating device relative to the direction in which a user draws on the aerosol - generating device during use.

[0032] The aerosol generating device may include a mouth end through which the aerosol leaves the aerosol generating device and is delivered to the user when in use. The mouth end may also be referred to as a proximal end. When in use, the user draws on the proximal end or mouth end of the aerosol generating device to inhale the aerosol generated by the aerosol generating device. Alternatively, the user may draw directly 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 a cavity. The cavity may be configured to receive the aerosol generating article. The aerosol generating device includes a distal end opposite to the proximal end or mouth end. The proximal end or mouth end 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 parts of components of the aerosol generating device may be upstream or downstream of each other based on their relative positions between the proximal end, downstream end or mouth end and the distal end or upstream end of the aerosol generating device.

[0033] 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, such as a part of a smoking article. The aerosol generating device may be a smoking device that interacts with an aerosol-forming substrate of an aerosol-generating article to generate an aerosol that can be inhaled directly into the user's lungs through the user's mouth. The aerosol generating device may be a holder. The device may be an electrically heated smoking device. The aerosol generating device may include a housing, a circuit system, a power supply, a heating chamber, and a heating element.

[0034] As used herein with reference to the present invention, the term "smoking" used in relation to a device, article, system, substrate or otherwise does not refer to conventional smoking in which the aerosol-forming substrate is completely or at least partially combusted. The aerosol generating device of the present invention is arranged to heat the aerosol-forming substrate to a temperature that is below the combustion temperature of the aerosol-forming substrate but at or above the temperature at which one or more volatile compounds of the aerosol-forming substrate are released to form an inhalable aerosol.

[0035] 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 the controller. The circuit system may include additional electronic components. The circuit system may be configured to regulate the supply of power to the heating element. Power may be continuously supplied to the heating element after activating the aerosol generating device, or may be supplied intermittently, such as on a puff-by-puff basis. 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 supply of power to the heating element depending on the resistance of the heating element.

[0036] An aerosol-generating device may include a power source, typically a battery, within the body of the aerosol-generating 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. As an alternative, the power source may be another form of charge storage device, such as a capacitor. The power source may need to be recharged and may have a capacity such that sufficient energy can be stored for one or more usage experiences; for example, the power source may have sufficient capacity to continuously generate aerosol for a time of about six minutes or a multiple of six minutes. In another example, the power source may have sufficient capacity to provide a predetermined number of puffs or discontinuous activation of the heating element.

[0037] The chamber of the aerosol-generating device may have an open end into which the aerosol-generating article is inserted. The open end may be the proximal end. The chamber may have a closed end opposite the open end. The closed end may be the base of the chamber. The closed end may be closed except for providing air holes disposed in the base. The base of the chamber may be flat. The base of the chamber may be circular. The base of the chamber may be disposed upstream of the chamber. The open end may be disposed downstream of the chamber. The chamber may have an elongate extension. The chamber 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 chamber may be parallel to the longitudinal axis of the aerosol-generating device.

[0038] The chamber may be configured as a heating chamber. The chamber may have a cylindrical shape. The chamber may have a hollow cylindrical shape. The shape of the chamber may correspond to the shape of the aerosol-generating article to be received in the chamber. The chamber may have a circular cross-section. The chamber may have an oval or rectangular cross-section. The chamber may have an inner diameter corresponding to the outer diameter of the aerosol-generating article.

[0039] An air flow channel may pass through the chamber. Ambient air may be drawn into the aerosol-generating device through the air flow channel, into the chamber, and towards the user. Downstream of the chamber, a mouthpiece may be disposed, or the user may draw directly on the aerosol-generating article. The air flow channel may extend through the mouthpiece.

[0040] In any aspect of the present disclosure, the heating element may comprise a resistive material. Suitable resistive materials include, but are not limited to: semiconductors, such as doped ceramics, "conductive" ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic materials and metal 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, and iron-manganese-aluminum alloys. In a composite material, the resistive material may optionally be embedded in, encapsulated by, or coated with an insulating material or vice versa, depending on the kinetics of energy transfer and the desired external physical and chemical properties.

[0041] As described, in any one of the aspects of the present disclosure, the heating element may be part of an aerosol-generating device. The aerosol-generating device may include an internal heating element, an external heating element, or both an internal heating element and an external heating element, where "internal" and "external" are with respect to the aerosol-forming substrate. 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 having different conductive portions, or a resistive metal tube. Alternatively, the internal heating element may be one or more heating pins or rods extending through the center of the aerosol-forming substrate. Other alternatives include heating wires or filaments, such as, for example, 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 resistive heating element may be formed using a metal having a defined relationship between temperature and resistivity. In such an exemplary device, the metal may be formed as tracks on a suitable insulating material (such as a ceramic material) and then sandwiched between another insulating material (such as glass). The heater formed in this way may be used to both heat and monitor the temperature of the heating element during operation.

[0042] The external heating element can be in any suitable form. For example, the external heating element can be in the form of one or more flexible heating foils on a dielectric substrate (e.g., polyimide). The flexible heating foil can be shaped to conform to the perimeter of the matrix receiving cavity. Alternatively, the external heating element can be in the form of a metal grid or multiple metal grids, 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 (e.g., plasma vapor deposition). The external heating element can also be formed using a metal having a defined relationship between temperature and resistivity. In such an exemplary device, the metal can be formed as tracks between two layers of suitable insulating material. The external heating element formed in this way can be used to both heat and monitor the temperature of the external heating element during operation.

[0043] As an alternative to a resistive heating element, the heating element can be configured as an inductive heating element. The inductive heating element can include an induction coil and a susceptor. Generally, the susceptor is a material that can generate heat when penetrated by an alternating magnetic field. When located in an alternating magnetic field. If the susceptor is conductive, eddy currents are typically induced by the alternating magnetic field. If the susceptor is magnetic, another effect that typically contributes to heating is generally referred to as hysteresis loss. Hysteresis loss is mainly due to the movement of magnetic domain blocks within the susceptor, as the magnetic orientation of these magnetic domain blocks will align with the alternating magnetic induction field. Another effect that contributes to hysteresis loss is when the magnetic domains will grow or shrink within the susceptor. Generally, all these changes in the susceptor that occur at the nanoscale or below are referred to as "hysteresis loss" because they generate heat in the susceptor. Thus, if the susceptor is both magnetic and conductive, both hysteresis loss and eddy current generation will contribute to the heating of the susceptor. If the susceptor is magnetic but not conductive, hysteresis loss will be the only means of heating the susceptor when penetrated by an alternating magnetic field. According to the present invention, the susceptor can be conductive or magnetic, or both conductive and magnetic. The susceptor is heated by an alternating magnetic field generated by one or more induction coils, and the susceptor then transfers the heat to the aerosol-forming matrix such that an aerosol is formed. The heat transfer can be mainly by heat conduction. This heat transfer is optimal if the susceptor is in close thermal contact with the aerosol-forming matrix.

[0044] 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 an aerosol. For example, the aerosol-generating article can be a smoking article that generates an aerosol that can be directly inhaled by a user into the user's lungs through the user's mouth. The aerosol-generating article can be disposable.

[0045] As used herein, the term "aerosol - forming substrate" refers to a substrate capable of releasing one or more volatile compounds that can form an aerosol. Such volatile compounds can be released by heating the aerosol - forming substrate. The aerosol - forming substrate can suitably be part of an aerosol - generating article or a smoking article.

[0046] The aerosol - forming substrate can be a solid aerosol - forming substrate. The aerosol - forming substrate can include both a solid component and a liquid component. The aerosol - forming substrate can include a tobacco - containing material that contains volatile tobacco flavor compounds released from the substrate upon heating. The aerosol - forming substrate can include non - tobacco materials. The aerosol - forming substrate can include aerosol - forming agents that contribute to the formation of a dense and stable aerosol. Examples of suitable aerosol - forming agents are glycerol and propylene glycol.

[0047] The aerosol - generating substrate preferably includes: homogenized tobacco material, an aerosol - forming agent, and water. Providing homogenized tobacco material improves aerosol generation, nicotine content, and flavor characteristics of the aerosol generated during heating of the aerosol - generating article. Specifically, the process of manufacturing homogenized tobacco involves grinding tobacco leaves, which more effectively achieves the release of nicotine and flavors upon heating.

[0048] Features described with respect to one embodiment can equally apply to other embodiments of the present invention. Description of the Drawings

[0049] The present invention will be further described by way of example only with reference to the accompanying drawings, in which:

[0050] Figure 1 A heating curve of an aerosol - generating device is shown, which shows the heating temperature of a heating element over time during a pre - heating phase and during a subsequent smoking phase; and

[0051] Figure 2 An aerosol - generating device is shown. Detailed Description

[0052] Figure 1 A heating curve of the heating element 32 of the aerosol - generating device 22 is shown (the device is shown in more detail below). The heating temperature 10 of the heating element 32 of the aerosol - generating device 22 is shown over time (in seconds - on the abscissa). First, a pre - heating phase 12 of the aerosol - generating device 22 is shown, in which the temperature of the heating element 32 increases from an initial temperature 14 (the ambient temperature of the surroundings) to a final operating temperature 16 of about 240 °C (also represented by the point "B" in Figure 2 ). The final operating temperature 16 is reached at the start of the smoking phase 18. Figure 1 ​

[0053] Between the initial temperature 14 and the final operating temperature 16 of the heating element 32, the heating element 32 will reach a predetermined preheat temperature 20 (also represented by point “A” in Figure 1 ). When the heating element 32 reaches the predetermined preheat temperature 20, the aerosol generating device 22 generates a puffing cue signal to the user via the puffing generating element. The user can then perform an initial puff at this predetermined preheat temperature 20 of the heating element 32 to remove potential excess moisture from the aerosol-forming substrate. The excess moisture will have been vaporized at the predetermined preheat temperature 20 of the heating element 32 since the predetermined preheat temperature 20 is about 140° C.

[0054] Figure 2 An aerosol generating device 22 is shown having a chamber 24 configured as a heating chamber and having an opening 26 at a proximal end 28 of the aerosol generating device 22. The chamber 24 is configured to receive an aerosol generating article 30 comprising an aerosol-forming substrate. The aerosol-forming substrate of the aerosol generating article 30 is heated by a heating element 32 disposed at least partially around the chamber 24.

[0055] The aerosol generating device 22 also includes a temperature sensor (not shown) configured to determine the temperature of the heating element 32 by measuring the resistance of the heating element 32. The temperature sensor may be integrated in the controller 34. The resistance of the heating element 32 varies with the temperature of the heating element 32 such that measuring the resistance of the heating element 32 indicates the temperature of the heating element 32. The output of the temperature sensor is received by the controller 34 which is also configured to control the operation of the puffing cue device 36. The puffing cue device 36 may be configured as a vibration element, an acoustic element or an optical element configured to generate a puffing cue signal to the user.

[0056] The puffing cue device 36, the controller 34 and the heating element 32 are powered by a power source 38 in the form of a battery.

[0057] When the heating element 32 has reached the predetermined preheat temperature 20 during the preheating phase 12 of the aerosol generating device 22, the puffing cue device 36 is controlled by the controller 34 to generate a puffing cue signal. The puffing cue signal indicates to the user that a puff should be performed during this time of the preheating phase 12 of the aerosol generating device 22 such that potential excess moisture can be removed from the aerosol-forming substrate by this puff without the vaporized moisture being too hot to cause an unpleasant puff.

[0058] Subsequently, the final operating temperature 16 of the heating element 32 is reached, and the desired smoking phase 18 can commence. The reaching of the final operating temperature 16 of the heating element 32 can be indicated by the puff cue device 36 by emitting a puff ready signal. The puff ready signal is different from the puff cue signal. During the smoking phase 18, the user's first puff will result in an optimal aerosol inhalation experience because excess moisture from the aerosol-forming substrate has been removed, and the heating element 32 can thus optimally generate aerosol from the aerosol-forming substrate.

Claims

1. An aerosol generating device, comprising: A heating element configured to heat an aerosol-forming substrate; A draw cue device; And A controller, wherein the controller is configured to control the draw cue device to generate a draw cue signal to the user when the heating element has reached a predetermined preheating temperature during a preheating phase of the heating element, and wherein the controller is configured to control the draw cue device to generate the draw cue signal before the heating element reaches a final heating temperature at the end of the preheating phase.

2. The aerosol generating device according to claim 1, wherein the puffing reminder means comprises a vibration element, preferably wherein the puffing reminder means is a vibration element.

3. The aerosol generating device according to claim 1, wherein the puffing reminder means comprises an acoustic element, preferably wherein the puffing reminder means is an acoustic element.

4. The aerosol generating device according to claim 1, wherein the puffing reminder means comprises an optical element, preferably wherein the puffing reminder means is an optical element.

5. The aerosol generating device according to any one of the preceding claims, wherein the predetermined preheating temperature is between 110°C and 180°C, preferably between 120°C and 160°C, more preferably between 130°C and 150°C, and most preferably 140°C.

6. The aerosol generating device according to any one of the preceding claims, wherein the aerosol generating device further comprises a temperature sensor, wherein the temperature sensor is configured to measure the temperature of the heating element, and wherein the controller is configured to control the puffing reminder means based on the output of the temperature sensor.

7. The aerosol generating device according to the previous claim, wherein the temperature sensor is configured to measure the temperature of the heating element by measuring the resistance of the heating element.

8. The aerosol generating device according to any one of the preceding claims, wherein the preheating stage starts from the activation of the aerosol generating device.

9. The aerosol generating device according to any one of the preceding claims, wherein the preheating stage has a duration of less than 60 seconds, preferably less than 50 seconds, more preferably less than 40 seconds, and most preferably less than 30 seconds.

10. The aerosol generating device according to any one of the preceding claims, wherein the puffing reminder signal is generated between 5 seconds and 30 seconds after the start of the preheating stage, preferably between 10 seconds and 20 seconds after the start of the preheating stage.

11. The aerosol generating device according to any one of the preceding claims, wherein the heating temperature of the heating element is higher than 200°C, preferably higher than 220°C, more preferably higher than 230°C, more preferably higher than 235°C, and most preferably about 235°C.

12. The aerosol-generating device according to the preceding claim, wherein the controller is configured to control the draw cue device to generate a draw-ready signal for the user when the heating element has reached the heating temperature.

13. The aerosol-generating device according to any one of the preceding claims, wherein the draw cue signal comprises one or more of the following: a vibration signal, a tactile signal, an acoustic signal, and an optical signal.

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

15. A method for removing excess moisture from an aerosol-forming substrate in an aerosol-generating device according to any one of the preceding claims, wherein the method comprises: - Controlling the draw cue device via the controller to generate a draw cue signal to the user when the heating element has reached a predetermined preheating temperature during a preheating phase of the heating element, and wherein the controller is configured to control the draw cue device to generate the draw cue signal before the heating element reaches a final heating temperature at the end of the preheating phase.

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