Ambient air compatible aerosol generator

Abstract

The present invention relates to an aerosol generation device including an air inlet configured to allow ambient air to enter the aerosol generation device. The device further comprises an airflow channel in fluid communication with the air inlet, and a filter element disposed in the airflow channel adjacent the air inlet and configured to filter the ambient air entering the aerosol generation device. The device further comprises a heating element disposed in the airflow channel adjacent the air inlet and configured to heat the ambient air entering the aerosol generation device.

Description

[Technical field]

[0001] The present invention relates to an aerosol generating device. [Background technology]

[0002] It is known to provide an aerosol-generating device for producing an inhalable vapour. Such a device may heat an aerosol-forming substrate to a temperature at which one or more components of the aerosol-forming substrate volatilise without burning the aerosol-forming substrate. The aerosol-forming substrate may be provided as part of an aerosol-generating article. A heating element may be disposed in or around the heating chamber of the aerosol-generating device to heat the aerosol-forming substrate when the aerosol-generating article is inserted into the heating chamber. The generated aerosol may be affected by the temperature and quality of the ambient air drawn into the aerosol-generating device.

[0003] It would be desirable to have an aerosol generating device that can generate a more uniform aerosol.It would be desirable to have an aerosol generating device that is less dependent on the temperature of the ambient air drawn into the device.It would be desirable to have an aerosol generating device that is less dependent on the quality of the ambient air drawn into the device. Summary of the Invention

[0004] According to one embodiment of the present invention, an aerosol generation device is provided that may include an air inlet configured to allow ambient air to enter the aerosol generation device. The device may further comprise an airflow channel in fluid communication with the air inlet, and a filter element disposed in the airflow channel adjacent the air inlet and configured to filter the ambient air entering the aerosol generation device. The device may further comprise a heating element disposed in the airflow channel adjacent the air inlet and configured to heat the ambient air entering the aerosol generation device.

[0005] According to one embodiment of the present invention, there is provided an aerosol generation device including an air inlet configured to allow ambient air to enter the aerosol generation device. The device further comprises an airflow channel in fluid communication with the air inlet, and a filter element disposed in the airflow channel adjacent the air inlet and configured to filter the ambient air entering the aerosol generation device. The device further comprises a heating element disposed in the airflow channel adjacent the air inlet and configured to heat the ambient air entering the aerosol generation device.

[0006] Filtering the ambient air entering the aerosol generating device may result in more uniform aerosol generation. Providing a filter element may result in more uniform airflow within the aerosol generating device. Filtering the ambient air entering the aerosol generating device may result in a device that is less dependent on the quality of the ambient air. Heating the ambient air entering the aerosol generating device may result in an aerosol generating device that is less dependent on the temperature of the ambient air drawn into the device. Heating the ambient air entering the aerosol generating device may result in more uniform aerosol generation.

[0007] The air inlet may be configured to allow ambient air to be drawn into the device. The wall of the housing of the aerosol generating device may be provided with at least one air inlet. The air inlet may be a semi-open inlet. A semi-open inlet may be an inlet that allows air or fluid flow in one direction, such as into the device, but at least restricts, preferably prohibits, air or fluid flow in the opposite direction. A semi-open inlet preferably allows air to enter the aerosol generating device. Air or liquid may be prevented from exiting the aerosol generating device through the semi-open inlet. A semi-open inlet may be, for example, a semi-permeable membrane, which is permeable to air only in one direction, but is air-tight and liquid-tight in the opposite direction. A semi-open inlet may also be, for example, a one-way valve. A semi-open inlet preferably allows air to pass through the inlet only if certain conditions are met, such as, for example, a minimum pressing of the aerosol generating device or a deposition of air through the valve or membrane.

[0008] The airflow channel may fluidly connect the air inlet of the device with the air outlet. The air outlet may be configured as or as a part of a mouthpiece. The air outlet may allow the user to inhale the generated aerosol. The airflow channel may be a central airflow channel. The air inlet may be provided at a proximal end face of the device. Alternatively, the air inlet may be a lateral air inlet. In this case, the airflow channel may fluidly connect the lateral air inlet with a central portion of the airflow channel. The airflow channel may have a circular, elliptical, or oval cross section.

[0009] The filter element may include a filter. The filter element may be a filter. The filter element may be disposed within the airflow channel such that air flowing through the airflow channel must pass through the filter element. The filter element may be disposed within the airflow channel such that ambient air entering the aerosol generating device flows through the filter element. The filter element may completely occupy at least a portion of the airflow channel. The filter element may completely occupy at least an upstream portion of the airflow channel.

[0010] The air can be diffused by the filter element. The air diffused by the filter element can ensure that the same volume of air flows at the same pressure and with good dispersion in the same volume space. This improves the distribution of air for subsequent aerosolization, strongly contributes to homogeneous aerosolization, creates consistent delivery during a puff, and can also positively contribute to puff-to-puff performance reproducibility (less puff-to-puff variation).

[0011] The filter element may be disposed against the air inlet. The filter element may be disposed in direct contact with the air inlet. The filter element may be disposed directly adjacent to the air inlet. The filter element may be disposed at an upstream-most position of the airflow channel.

[0012] The filter element may have a cylindrical shape. The filter element may have a circular, elliptical, or oval cross section. The filter element may have the same cross-sectional shape as the airflow channel. The filter element may have an outer diameter corresponding to the inner diameter of the airflow channel. The filter element may preferably be configured as a prismatic parallelepiped.

[0013] As used herein, the terms "upstream," "downstream," "proximal," and "distal" are used to describe the relative location of a component or portion of a component of an aerosol generating device with respect to the direction in which a user draws on the aerosol generating device when the aerosol generating device is in use.

[0014] The filter element may include a porous element. The porous element may be configured as a porous element. The filter element may be fluid permeable.

[0015] The filter element may be made from a compound selected from silicon carbide, silicon-based compounds, cordierite, silica, and zirconium-based ceramic compounds. It may be particularly preferred that the filter element is made from a silica-based sintered porous ceramic material, a porous basalt stone material, and / or sintered particles. It may be sintered to obtain a desired range of porosity, such as a porous silica ceramic produced from a silica spinning solution, where the silica particles are introduced by electrospinning and then subjected to sintering to obtain the final desired geometric shape and size, and also the desired porosity. The sintering process is carried out at a temperature of 1000°C to 1200°C.

[0016] The porosity of such materials is between 30% and 80%, preferably between 40% and 70%, and most preferably between 50% and 60%. The porosity of the material can be adjusted by varying the content of the introduced silica particles and by varying their particle size, which allows good control of the desired porosity. Porosity refers to the pore volume (Vp) of a defined volume of material and its total volume (Vt). The porosity (Pt) is therefore given by the ratio Vp / Vt. To express the porosity as a percentage, simply multiply the decimal by 100.

[0017] The filter element may have a porosity of from 35% to 80%, preferably from 45% to 65%, and most preferably from 50% to 60%.

[0018] The pore size of the filter material may be from 5 μm to 40 μm, preferably from 5 μm to 30 μm.

[0019] The filter element may be made of an electrically non-conductive material. The filter element may be an electrical insulator.

[0020] The filter element may be configured to diffuse and / or spread the ambient air entering the aerosol generating device such that a more uniform aerosol may be produced by the device.

[0021] The air inlet may have an inner diameter of 0.05 mm to 2 mm, preferably 0.5 mm to 1.2 mm.

[0022] Both the inner diameter of the air inlet and the characteristics of the filter element, particularly the porosity, can define the resistance to withdrawal of the device. Thus, the inner diameter of the air inlet and the characteristics of the filter element can be selected to determine the desired resistance to withdrawal.

[0023] The airflow channel may have an inner diameter of 0.05 mm to 2 mm, preferably 0.5 mm to 1.2 mm. The filter element may have an outer diameter of 0.05 mm to 2 mm, preferably 0.5 mm to 1.2 mm.

[0024] The heating element may be configured to heat the ambient air entering the aerosol generating device to a temperature between 15°C and 35°C, preferably between 20°C and 30°C, more preferably between 22°C and 28°C, and most preferably to 25°C.

[0025] The heating element may be disposed to at least partially surround the airflow channel.The heating element may be disposed to at least partially surround an upstream portion of the airflow channel.

[0026] Alternatively, and particularly preferably, the heating element can be one or more of overmolded on the filter element, printed on the filter element, or impregnated in the filter element. Exemplarily, the heating element can be printed on the filter element or impregnated in the filter element and then overmolded. In this way, the ambient air flowing through the filter element can be heated by the heating element at the same time. In this case, the filter element overmolded with the heating element is obtained by slurry molding a compound for producing a porous medium with a suitable porosity and overmolding it together with the heating element. The compound can be any filter element material described herein, in particular a ceramic material.

[0027] Alternatively, the filter element may include an upstream segment and a downstream segment. The heating element may be located between the upstream segments in the downstream segment. Both the upstream segments in the downstream segment may be porous. The porous upstream portion may differ in terms of porosity compared to the downstream portion. The downstream portion may have a higher porosity than the upstream portion. The porosity of the downstream portion may be 25% to 80%, preferably 55% to 75%, and most preferably 65% ​​to 75%. This may facilitate the supply of airflow over the entire volume area of ​​the upstream portion, resulting in improved hydrodynamics of the airflow, which is slowed down by the high porosity of the downstream portion. The downstream portion may offer more resistance to the air flowing through it. This may optimize heat transfer. This may further improve RTD control.

[0028] The heating element may be configured to heat the filter element, thereby heating the ambient air that enters the aerosol generating device and flows through the filter element.

[0029] The heating element may be disposed within the airflow channel. The heating element may be disposed within the airflow channel such that air flowing through the airflow channel must pass through the heating element. The heating element may be fluid permeable.

[0030] The heating element may be disposed within the airflow channel such that ambient air entering the aerosol generating device flows through the heating element. The heating element may completely extend over at least a portion of the airflow channel. The heating element may completely extend over at least an upstream portion of the airflow channel.

[0031] The heating element may be disposed against the air inlet. The heating element may be disposed at the most upstream position of the airflow channel. The heating element may have a planar shape. The heating element may have a circular or elliptical or oblong cross section. The heating element may have the same cross-sectional shape as the airflow channel. The heating element may have an outer diameter corresponding to the inner diameter of the airflow channel.

[0032] The heating element may comprise or be configured as a mesh heater.

[0033] The heating element may be a resistive heater. The heating element may have an output power of 0.7W to 2.8W, preferably 0.9W to 1.7W. The heating element may be made of a suitable stainless steel alloy, such as industrial stainless steel 303 and 304 alloys, which have excellent high temperature oxidation resistance, as well as sufficient electrical conductivity and resistivity properties while having good thermal conductivity. Stainless steel alloys have a thermal conductivity of about 6.9×10 at 25°C. -7 (Ω·m). Stainless steel alloys have a resistivity of about 1.45×10 at 25°C. 6 The electrical conductivity may be

[0034] In any aspect of the present disclosure, the heating element may include an electrically resistive material. Suitable electrically resistive materials include, but are not limited to, semiconductors such as doped ceramics, "conductive" ceramics (e.g., molybdenum disilicide, etc.), carbon, graphite, metals, metal alloys, and composites made of ceramic and metallic materials. Such composites 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, cobalt-containing, chromium-containing, aluminum-containing, titanium-containing, zirconium-containing, hafnium-containing, niobium-containing, molybdenum-containing, tantalum-containing, tungsten-containing, tin-containing, gallium-containing, manganese-containing, gold-containing, and iron-containing alloys, as well as nickel-, iron-, cobalt-, and stainless steel-based superalloys, Timetal®, and iron-manganese-aluminum-based alloys. In composite materials, the electrically resistive material may optionally be embedded, encapsulated or coated in the insulating material, or vice versa, depending on the required energy transfer kinetics and external physicochemical properties.

[0035] The heating element may be made from a hot wire or filament, such as Ni-Cr (nickel-chromium), platinum, tungsten or alloy wire or a heated plate.

[0036] When the heating element is disposed to at least partially surround the airflow channel, the heating element may take the form of one or more flexible heating foils on a dielectric substrate such as polyimide. The flexible heating foils may be molded to fit around the airflow channel. Alternatively, the heating element may take the form of a metal grid, a flexible printed circuit board, a molded integrated circuit device (MID), a ceramic heater, a flexible carbon fiber heater, or may be formed using a coating technique such as plasma deposition onto a suitably shaped substrate.

[0037] The heating element may be formed using a metal that has a well-defined relationship between temperature and resistivity. The metal may be formed as a track on a suitable insulating material, such as a ceramic material, most preferably a filter element. The metal may be sandwiched between another insulating material, such as glass.

[0038] The heating element may be used to both heat the element and monitor its temperature during operation. The heating element may be made of a material whose resistance indicates the temperature of the material.

[0039] The aerosol generating device may further comprise a temperature sensor and a controller. The temperature sensor may be configured to measure the temperature of ambient air entering the aerosol generating device upstream of the heating element. The controller may be configured to control the heating element based on the output of the temperature sensor.

[0040] A temperature sensor may be adjacent the air inlet. The temperature sensor may be in communication with the controller to enable the controller to heat the ambient air flowing through the filter element to a predetermined temperature. The temperature sensor may be a thermocouple, or alternatively, a heating element may be used to provide information related to the temperature of the ambient air. Temperature dependent resistance properties of heating elements are known and may be used to determine the temperature of the heating element. The temperature of the heating element may be indicative of the temperature of the ambient air before the heating operation is initiated. However, it is preferred that the temperature sensor is configured as a thermocouple.

[0041] The controller may be configured to operate the heating element when the temperature sensor detects that the temperature of the ambient air is below 20°C, preferably below 15°C, more preferably below 10°C, and most preferably below 5°C.

[0042] The controller may be configured to regulate the power supply to the heating element. Power may be continuously supplied to the heating element following activation of the aerosol generating device, or may be supplied intermittently (e.g., with each puff). Power may be supplied to the heating element in the form of current pulses. The controller may be configured to monitor the electrical resistance of the heating element, and to control the supply of power to the heating element, preferably in response to the electrical resistance of the heating element.

[0043] The aerosol generating device may include a power source (typically a battery) within the main 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 (e.g., a lithium cobalt battery, a lithium iron phosphate battery, a lithium titanate battery, or a 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 that allows for storage of sufficient energy for one or more use experiences. For example, the power source may have a capacity sufficient to continuously generate aerosol for about six minutes, or a multiple of six minutes. In another example, the power source may have a capacity sufficient to provide a predetermined number of puffs, or discontinuous activation of the heating element.

[0044] As used herein, "aerosol-generating device" refers 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, e.g., part of a smoking article. The aerosol-generating device may be a smoking device that interacts with the aerosol-forming substrate of the aerosol-generating article to generate an aerosol that is inhalable directly through the user's mouth into the user's lungs. The aerosol-generating device may be a holder. The device may be an electrically heated smoking device. The aerosol-generating device may comprise a housing, an electrical circuit, a power source, a heating chamber, and a heating element.

[0045] The aerosol generating device may include a mouthpiece, the mouthpiece may include first and second planar susceptors arranged parallel to and spaced apart from one another, and the mouthpiece may include a telescoping element configured to retract the first and second susceptors at least partially into the mouthpiece to a retracted position for removal of the consumable.

[0046] The aerosol generating device may include a heating section. The heating section may include an inductor. The heating section may be configured to be removably connectable to the mouthpiece. The heating section may include a heating chamber and an inductor. The inductor may be located outside the heating chamber. The inductor may be thermally shielded from the heating chamber. For example, the heating section may include a heating chamber having a rectangular cross section. The heating chamber may be sandwiched between a first planar induction coil located above the heating chamber and a second planar induction coil located below the heating chamber. A layer of insulating material may be provided between the heating chamber and the first and second coils, respectively. The heating section may be configured to be removably connectable to the mouthpiece via a first connecting element. The first connecting element may include one or more of a form lock connecting element, a force lock connecting element, and a snap fit connecting element. The heating section may include a cavity for receiving a planar consumable including an aerosol-forming substrate. The cavity may be configured as a heating chamber for heating the aerosol-forming substrate of the consumable. The heating zone may include at least one temperature sensor configured to measure a temperature of one or both of the first and second susceptors. The controller may be configured to control the supply of electrical energy from the power source to the inductor based on an output of the at least one temperature sensor of the heating zone.

[0047] The aerosol generating device may include a body. The body may include a power source. The body may be removably connectable to the heating section. The body may be removably connectable to the heating section via a second connection element. The second connection element may include one or more of a form-lock connection element, a force-lock connection element, and a snap-fit ​​connection element. The inductor may include at least one induction coil. The inductor may include a first induction coil and a second induction coil. One or both of the first and second induction coils may be planar. The body may include a controller and a DC / AC converter configured to control the supply of alternating current from the power source to the inductor.

[0048] The aerosol-generating substrate may include an aerosol former. The aerosol-generating substrate preferably includes a homogenized tobacco material, an aerosol former, and water. Providing a homogenized tobacco material may improve aerosol generation and the nicotine content and flavor profile of the aerosol generated during heating of the aerosol-generating article. Specifically, the process of making homogenized tobacco involves grinding tobacco leaves, which allows for more efficient release of nicotine and flavor upon heating.

[0049] Alternatively, the aerosol-forming substrate may be a liquid aerosol-forming substrate and may be contained in a liquid reservoir of the aerosol generating device.

[0050] Draw resistance, also known as draft resistance, pull resistance, puff resistance, or puffability, is the pressure required to force air at a rate of 17.5 mL / sec through the entire length of the object under test at 22° C. and 760 Torr (101 kPa). It is measured according to ISO 6565:2002 and is generally expressed in units of mmH2O. The air inlet, and particularly the filter element, advantageously together provide an RTD of 10 to 65 mmH2O through the airflow channel.

[0051] Features described with respect to one embodiment may be equally applied to other embodiments of the invention.

[0052] The invention will now be further described, by way of example only, with reference to the accompanying drawings in which: [Brief description of the drawings]

[0053] [Figure 1] FIG. 1 illustrates an exemplary aerosol generating device according to the present invention. [Diagram 2] FIG. 2 shows the main body of the aerosol generating device. [Diagram 3] FIG. 3 shows a heating element of an aerosol generating device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0054] 1 shows an exemplary aerosol generation device 10. The aerosol generation device 10 includes a mouthpiece 12 configured to be attached to a body 14 of the aerosol generation device 10. Alternatively, the mouthpiece 12 may be integrated into the aerosol generation device 10. As a further alternative, additional elements of the aerosol generation device 10 may be attachable between the mouthpiece 12 and the body 14 of the aerosol generation device 10.

[0055] 2 shows in more detail the body 14 of the aerosol generating device 10. Disposed within a housing 20 of the body 14 is a power supply 16 in the form of a battery and a controller 18.

[0056] At the downstream or distal end of the body 14, a data and charging port 22 is provided. At the upstream or proximal end of the body 14, a protruding wall 24 is provided for attachment of the mouthpiece 12 to the body 14. However, as shown, the mouthpiece 12 or different elements of the aerosol generation device 10 may be integral with the body 14. The protruding wall 24 may include one or both of mechanical and magnetic connecting elements to enable connection with the mouthpiece 12 or different modular elements.

[0057] 2 further illustrates an air inlet 26 disposed in the housing 20 of the body 14. The air inlet 26 is configured as a lateral air inlet 26. The air inlet 26 is disposed adjacent the upstream end of the body 14. The air inlet 26 is configured to allow ambient air to be drawn into the aerosol generation device 10, and in particular into the airflow channel 38 of the aerosol generation device 10.

[0058] Alternatively, the air inlet 26 may be located anywhere else within the aerosol generation device 10. Illustratively, the air inlet 26 may be disposed at the upstream end of the aerosol generation device 10. Alternatively, the air inlet 26 may be disposed in the mouthpiece 12. As a further alternative, a single air inlet may be provided instead of the at least two air inlets 26, as shown in FIG.

[0059] Adjacent to the air inlet 26, a filter element 28 is disposed. The filter element 28 has a rectangular cross section. The filter element 28 is made of a ceramic material. The filter element 28 is porous. The filter element 28 is fluid permeable. The filter element 28 allows ambient air to be drawn through the filter element 28. The ambient air is filtered by the filter element 28. The ambient air is then drawn towards the mouthpiece 12, in particular towards an air outlet in the mouthpiece 12, so that the air can be inhaled by the user. In the embodiment shown in Figures 1 and 2, the mouthpiece 12 is configured to generate an inhalable aerosol. Alternatively, aerosol generation can be promoted within the body 14, in which case aerosol generation occurs downstream of the filter element 28.

[0060] FIG. 2 further illustrates a temperature sensor 30. The temperature sensor 30 is preferably configured as a thermocouple. The temperature sensor 30 is disposed adjacent to the air inlet such that the temperature sensor 30 can detect the temperature of the ambient air being drawn into the aerosol generating device 10. The temperature sensor 30 is electrically connected to the controller 18 by suitable wiring. The temperature sensor 30 is configured to detect the temperature of the ambient air and output a corresponding signal to the controller 18. The controller 18 is configured to receive the output of the temperature sensor 30. The controller 18 is configured to control the supply of electrical energy from the power source 16 to a heating element 32, which will be described in more detail below with reference to FIG. 3. The controller 18 is configured to control the supply of electrical energy based on the output of the temperature sensor 30. If the ambient air is too cold, the temperature of the ambient air is increased by the controller 18 operating the heating element 32.

[0061] FIG. 3 shows the heating element 32 in more detail. The heating element 32 is provided as a heating track on a substrate. The substrate is a filter element 28. In the embodiment shown in FIG. 3, the heating element 32 is overmolded onto the filter element 28. The heating element 32 is overmolded with a porous material 34. This forms a porous and fluid-permeable heating element 32 such that ambient air can be drawn through the filter element 28 and further through the heating element 32. Thus, ambient air is filtered by the filter element 28 and simultaneously heated to provide high quality ambient air with controlled temperature for improved aerosol generation.

[0062] 3 further shows electrical contacts 36 for contacting the heating element 32 with one or both of the controller 18 and the power source 16. The electrical contacts 36 are configured to allow electrical energy to be provided from the power source 16 to the heating element 32 to heat the heating element 32. Heating element 32 of FIG. 3 is overmolded onto filter element 28 of FIG. 2 or printed onto heating element 32 of FIG.

Claims

1. An aerosol generating device, comprising: an air inlet configured to allow ambient air to enter the aerosol generating device; an airflow channel in fluid communication with the air inlet; a filter element disposed in the airflow channel adjacent the air inlet and configured to filter the ambient air entering the aerosol generating device; and An aerosol generating device comprising a heating element disposed in the airflow channel adjacent to the air inlet and configured to heat the ambient air entering the aerosol generating device, the heating element being configured to heat the ambient air entering the aerosol generating device to a temperature of 15°C to 35°C.

2. 2. The aerosol generating device of claim 1, wherein the filter element comprises, and is preferably configured as, a porous element.

3. 2. The aerosol generating device of claim 1, wherein the filter element is disposed within the airflow channel such that the ambient air entering the aerosol generating device flows through the filter element.

4. 2. The aerosol generating device of claim 1, wherein the filter element is configured to either diffuse or widen the ambient air entering the aerosol generating device.

5. 2. The aerosol generating device of claim 1, wherein the heating element is configured to heat the ambient air entering the aerosol generating device to a temperature of between 20°C and 30°C, preferably between 22°C and 28°C, more preferably 25°C.

6. The aerosol generating device of claim 1 , wherein the heating element is disposed so as to at least partially surround the airflow channel.

7. 2. The aerosol generating device of claim 1, further comprising a temperature sensor and a controller, wherein the temperature sensor is configured to measure the temperature of the ambient air entering the aerosol generating device upstream of the heating element, and the controller is configured to control the heating element based on the output of the temperature sensor.

8. 8. The aerosol generating device of claim 7, wherein the controller is configured to operate the heating element when the temperature sensor detects that the temperature of the ambient air is less than 20°C, preferably less than 15°C, more preferably less than 10°C, and most preferably less than 5°C.

9. 2. The aerosol generating device of claim 1, wherein the heating element is overmolded onto the filter element.

10. The aerosol generating device of claim 1 , wherein the heating element is printed on the filter element.

11. 2. The aerosol generating device of claim 1, wherein the heating element is configured to heat the filter element and thereby heat the ambient air entering the aerosol generating device.

12. The aerosol generating device according to claim 1 , wherein the heating element is disposed in the airflow channel.

13. 2. The aerosol generating device of claim 1, wherein the heating element is fluid permeable.

14. 10. The aerosol generating device of claim 1, wherein the filter element is made of a ceramic material.

15. 2. The aerosol generating device according to claim 1, wherein the filter element has a porosity of 30% to 80%, preferably 40% to 70%, and most preferably 50% to 60%.

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