WO2021052728A1

WO2021052728A1 - An aerosol generating device and a system configured to be used with an aerosol generating device

Info

Publication number: WO2021052728A1
Application number: PCT/EP2020/073813
Authority: WO
Inventors: Frederic Nicolas
Original assignee: Philip Morris Products SA
Current assignee: Philip Morris Products SA
Priority date: 2019-09-18
Filing date: 2020-08-26
Publication date: 2021-03-25
Anticipated expiration: 2022-03-18

Abstract

There is provided an aerosol generating device for receiving an aerosol forming substrate, the aerosol-generating device comprising: a mouth end; a distal end upstream from the mouth end; a first air inlet; a first air outlet located at the mouth end; a first air flow path between the first air inlet and the first air outlet; a fan; a second air inlet; a second air outlet; a second air flow path between the second air inlet and the second air outlet, the fan being located along the second air flow path; wherein the first air flow path is fluidly separated from the second air flow path. There is also provided a system configured to be used with an aerosol generating device.

Description

An aerosol generating device and a system configured to be used with an aerosol generating device

The present invention relates to an aerosol generating device for receiving an aerosol forming substrate and a system configured to be used with an aerosol generating device.

Recent years have seen the emergence of two main categories of aerosol generating systems that produce an inhalable aerosol by heating rather than by burning an aerosol forming substrate. One system, which may be described as an e-cigarette system, typically comprises a liquid aerosol forming substrate provided as part of a cartridge. Such cartridges may comprise an atomiser unit. In use, liquid is conveyed from the cartridge by a wick to a heating element, such as a heating coil, where the liquid is vaporised. A second system, which may be described as a heated tobacco system, involves the heating of a substrate comprising tobacco to a temperature above which one or more volatile compounds are released, but below a combustion temperature of the substrate. Such a substrate may be a solid substrate .

Some users of aerosol generating devices like to create so called "vaping tricks", also referred to as "aerosol tricks". Some users of aerosol generating devices particularly like to create videos of aerosol tricks. The aerosol tricks which users are able to achieve include making figures, shapes or patterns with aerosol, by controlling not only the way they blow aerosol with their mouth and nose, but also, controlling with their hands the air around the exhaled aerosol (this is usually called "vape bending" although other names could be used). Furthermore, in order to increase the producible effects of their aerosol tricks, users have tried to add colours to their aerosol. In order to create coloured aerosol tricks, users typically use either video editing or coloured laser pointers directed to the exhaled aerosol. In particular, when quickly moving a laser along an axis (or rotating it along an axis) into an aerosol cloud, a bright "layer" of aerosol seemingly appears in the illuminated area of exhaled aerosol.

It would be desirable to provide an aerosol generating devices which may provide improved possibility to perform aerosol tricks. It would also be desirable to provide users with aerosol generating devices that simplify the production of aerosol tricks. According to embodiments, the invention relates to an aerosol generating device for receiving an aerosol forming substrate, the aerosol generating device comprising: a mouth end; a distal end opposite to the mouth end; a first air inlet; a first air outlet located at the mouth end; and a first air flow path defined between the first air inlet and the first air outlet. The aerosol generating device comprises further a fan; a second air inlet; a second air outlet; a second air flow path defined between the second air inlet and the second air outlet, the fan being located along the second air flow path. The first air flow path is fluidly separated from the second air flow path. According to embodiments, the invention relates to an aerosol generating device for receiving an aerosol forming substrate, the aerosol generating device comprising: a mouth end; a distal end opposite to the mouth end; a first air inlet; a first air outlet located at the mouth end; and a first air flow path defined between the first air inlet and the first air outlet. The aerosol generating device comprises further a fan; a second air inlet; a second air outlet; a second air flow path defined between the second air inlet and the second air outlet, the fan being located along the second air flow path. The aerosol generating device preferably also comprises a partition movable between a first position and a second position, wherein, when the partition is in the first position, the first air flow path and the second air flow path are in fluid communication and wherein, when the partition is in the second position, the first air flow path and the second air flow path are fluidly separated.

The aerosol generating device comprises a first air flow path and a second air flow path, separated from each other. The separation is present at least in a configuration. The first air flow path is the air flow path for the inhalation of the aerosol generated by the user. The second air flow path is the flow path in which a fan is located so that a flow of air can be forcefully drawn in or blown out by the fan out of the aerosol generating device. This generates a controlled forced air flow which may improve or assist the generation of aerosol tricks.

Utilizing the aerosol generating device of the invention enables an immersive experience for the user that may perform more complex and elaborated aerosol tricks than with a standard aerosol generating device. This is because not only the air flow produced by his or her hands may be used to control the aerosol shape and direction but also a controlled air flow generated by the fan of the aerosol generating device.

The term "aerosol generating device" refers to a device configured to couple to, or comprise, an aerosol forming substrate to generate aerosol. The combination of the aerosol generating device with the aerosol forming substrate defines an "aerosol generating system". The aerosol generating device may be an aerosol forming substrate heating device. The aerosol generating device may comprise one or more of a housing, a controller, an aerosolizer, a power source, and a cavity defined by the housing to receive the aerosol forming substrate. The aerosol generating device may comprise an aerosolizer to generate aerosol from the aerosol forming substrate. The controller may be operatively coupled to the aerosolizer to deliver power for aerosolizing the aerosol forming substrate from the power source, such as a battery. The aerosol forming substrate may be removably coupled to the aerosolizer or housing of the aerosol generating device. The aerosol forming substrate may be at least partially inserted, received, or disposed in the housing of the aerosol generating device. The aerosolizer may comprise an atomizer. Preferably, an atomizer may be used for aerosol generating devices configured for use with a liquid aerosol forming substrate. The atomiser may comprise a heating element. The atomiser may comprise a transport element for transporting liquid aerosol forming substrate to the heating element. The transport element may comprise a wick. In some embodiments, the aerosolizer may comprise a heating element. Preferably, when the device is configured for use with a solid aerosol-forming substrate, the device comprises a heating element.

In some embodiments, the aerosolizer may comprise a heating blade. The heating blade is arranged to heat the aerosol forming substrate to release one or more volatile compounds from the aerosol forming substrate. The one or more volatile compounds may form an aerosol.

In some embodiments, the aerosolizer may comprise a heating element, a heating coil, a chemical heat source such as a carbon heat source, or any suitable means that heats a liquid substrate to generate aerosol from a liquid substrate. The aerosolizer may receive electrical energy or power to release or generate aerosol from the aerosol forming substrate from the power source. In some embodiments, the aerosolizer may be a heating element that varies in temperature depending on the electrical energy received. For example, the heating element may rise in temperature in response to a higher voltage received. The aerosolizer may be disposed adjacent to the aerosol forming substrate. For example, the aerosolizer may be coupled adjacent to the aerosol forming substrate inside the housing of the aerosol forming device.

The controller described herein may comprise a processor, such as a central processing unit (CPU), computer, logic array, or other device capable of directing data coming into or out of the aerosol generating device. In some embodiments, the controller comprises one or more computing devices having memory, processing, and communication hardware. The functions of the controller may be performed by hardware or as computer instructions on a non-transient computer readable storage medium. The processor of the controller may comprise any one or more of a microprocessor, a controller, a microcontroller, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or equivalent discrete or integrated logic circuitry. In some examples, the processor may comprise multiple components, such as any combination of one or more microprocessors, one or more controllers, one or more DSPs, one or more ASICs, or one or more FPGAs, as well as other discrete or integrated logic circuitry. The functions attributed to the controller or processor herein may be embodied as software, firmware, hardware, or any combination thereof. While described herein as a processor-based system, an alternative controller could utilize other components such as relays and timers to achieve the desired results, either alone or in combination with a microprocessor-based system.

In one or more embodiments, the exemplary systems, methods, and interfaces may be implemented using one or more computer programs using a computing apparatus, which may comprise one or more processors or memory. Program code or logic described herein may be applied to input data or information to perform functionality described herein and generate desired output data or information. The output data or information may be applied as an input to one or more other devices or methods as described herein or as would be applied in a known fashion. In view of the above, it will be readily apparent that the controller functionality as described herein may be implemented in any manner known to one skilled in the art.

The term "aerosol forming substrate" refers to a substrate that releases, upon heating, volatile compounds that may form an aerosol to be inhaled by a user. Suitable aerosol forming substrates may comprise plant-based material. For example, the aerosol forming substrate may comprise tobacco or a tobacco- containing material containing volatile tobacco flavour compounds, which may be released from the aerosol forming substrate upon heating. In addition, or alternatively, an aerosol forming substrate may comprise a non-tobacco containing material. The aerosol forming substrate may comprise homogenized plant-based material. The aerosol forming substrate may comprise at least one aerosol former. The aerosol forming substrate may comprise other additives and ingredients such as flavourants. In some preferred embodiments, the aerosol generating substrate comprises glycerol, propylene glycol, water, nicotine and, optionally, one or more flavorants. Preferably, the aerosol generating substrate comprises nicotine material. The aerosol forming substrate may be a liquid at room temperature. For example, the aerosol generating substrate may be a liquid solution, suspension, dispersion or the like. The aerosol forming substrate may be a solid aerosol forming substrate. Alternatively, the aerosol forming substrate may comprise both solid and liquid components. The aerosol forming substrate may further 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 device may also comprise an actuator. The actuator may be operatively coupled to the controller. The actuator may comprise a button or other type of switch. The engagement of the actuator may initiate various functionality of the aerosol generating device.

As used herein, the term "inhalation" is intended to mean the action of a user drawing an aerosol into their body through their mouth or nose. Inhalation comprises the situation where an aerosol is drawn into the user's lungs, and also the situation where an aerosol is only drawn into the user's mouth or nasal cavity before being expelled from the user's body.

The aerosol generating device of the invention is adapted to receive an aerosol forming substrate from which aerosol is formed. The aerosol generating device coupled with the aerosol forming substrate form an aerosol generating system. The aerosol may be formed by heating the aerosol forming substrate, for example by means of an aerosolizer. During operation of the aerosol generating device, the aerosol forming substrate may be partially or completely contained within the aerosol generating device. In order to inhale aerosol from the device, a user may draw on a portion of the aerosol generating device. The portion of the aerosol generating device where the user draws on is called the mouth end of the device. The aerosol generating device defines an opposite distal end to the mouth end.

The aerosol generating device may comprise a mouthpiece connected to the mouth end. The mouthpiece portion refers to a portion of the aerosol generating device that is placed in the user's mouth in order to directly inhale the aerosol generated by the aerosol forming substrate. The aerosol may be conveyed to the user's mouth through the mouthpiece.

Further, in the aerosol generating device, first air flow path and second air flow path may be defined. The first air flow path is the "standard" air flow path used by the user to inhale the aerosol in the standard operation of the aerosol generating device. This first air flow path connects a first air inlet and a first air outlet. The first air outlet may be located at the mouth end of the aerosol generating device. The mouth end of the aerosol generating device is a downstream end of the aerosol- generating device. In use, the air enters the aerosol generating device at the first air inlet and exits the aerosol generating device at the first air outlet. The first air outlet may be located downstream the first air inlet in the direction of flow of the air in the first air flow path. Preferably, the air enters the aerosol generating device at the first air inlet, flows through the aerosol forming substrate and exits the aerosol generating device at the first air outlet. The first air inlet is preferably located upstream the aerosol forming substrate in the direction of flow of the air in the first air flow path. Preferably, the aerosol forming substrate is located upstream the first air outlet in the direction of flow of the air in the first air flow path.

In the embodiment including a mouthpiece, the first air inlet is preferably located upstream the mouthpiece in the direction of flow of the air in the first air flow path. Preferably, the mouthpiece is located downstream the aerosol forming substrate in the direction of flow of the air in the first air flow path.

Preferably, the aerosol generating device comprises an aerosolizer arranged to heat the aerosol forming substrate to form an aerosol. In operation, the user may inhale on the mouth end of the aerosol generating device, drawing air from an external environment into the aerosol generating device via the first air inlet. Preferably, the air drawn in the aerosol generating device exits the aerosol generating device from the first air outlet. Preferably, the first air outlet is located at the mouth end of the aerosol generating device. Preferably, the longitudinal axis of the casing passes through the first air outlet. Preferably, the first air flow path passes through a location within the aerosol generating device where the aerosol forming substrate is positioned. In this way, preferably the air flow brings the aerosol formed by the aerosol forming substrate into the user's mouth.

The first air inlet may comprise a plurality of apertures formed on the aerosol generating device. The first air outlet may comprise a single aperture located at the mouth end.

The aerosol generating device may comprise a casing. Preferably, the first air inlet is formed in the casing. Preferably, the first air inlet is realized as an aperture in the casing. The casing may be tubular. The casing may be substantially cylindrical in shape. The casing may comprise a substantially cylindrical surface. The first air inlet may be formed on the cylindrical surface of the casing. The casing may be substantially elongate. The casing may have a length. The casing may define a circumference substantially perpendicular to the length. The casing may define a longitudinal axis. The distal end and the mouth end are positioned at the two opposite ends of the aerosol generating device along its longitudinal axis. The length of the casing may be defined as the distance between the opposite distal end and mouth end of the aerosol generating device along the longitudinal axis.

Preferably, when the users draws air in from the mouth end, an air flow is sucked into the casing of the aerosol generating device from the first air inlet initially along a direction substantially perpendicular to the longitudinal axis of the casing. Then, in order to exit from the mouth end, the so formed air flow may bend and form an air flow flowing along a direction parallel to the longitudinal axis of the casing. Preferably, the air flow passes through the aerosol forming substrate along a direction parallel to the longitudinal axis of the casing. The air flow exits through the first air outlet at the mouth end moving along a direction parallel to the longitudinal axis of the casing. The first air flow path may have any shape. It might be L-shaped as above described, extending from the first air inlet radially formed on the casing to the first air outlet at the mouth end. Different shaped first air flow paths may be used.

The first air inlet may comprise a plurality of apertures. The plurality of apertures may be formed around a circumference on the casing of the aerosol generating device. Preferably, the plurality of apertures are angularly separated by a constant angular spacing.

The aerosol forming substrate is preferably housed in the aerosol generating device along the first air flow path. The casing may comprise a substrate housing where the aerosol forming substrate is inserted. Preferably, the substrate housing comprises a cavity. Preferably, the substrate housing is located adjacent to the mouth end. Preferably, the aerosolizer is located along the first air flow path. Preferably, the aerosolizer is located adjacent to the aerosol forming substrate. The aerosolizer may be positioned upstream the aerosol forming substrate in the direction of flow of the air flowing through the first air flow path from the first air inlet towards the user's mouth.

Further, the aerosol generating device comprises a second air inlet and a second air outlet connected by the second air flow path. This second air flow path is used to suck air into or blow air from the aerosol generating device in case an "aerosol tricks" production is desired. The second air inlet or the second air outlet or both may comprise an aperture on the casing of the aerosol generating device. Preferably, one of the second air inlet and the second air outlet is located at the distal end opposite to the mouth end. Preferably, the longitudinal axis of the casing passes through the second air outlet or the second air inlet located at the distal end. The other of the second air inlet and the second air outlet may be formed on the cylindrical surface of the casing. Preferably, the second air inlet or the second air outlet is of relative small dimension. The relative small dimension may result in a relative high velocity air flow through the second air inlet or second air outlet. This is because air flow speed may be increased by decreasing the cross sectional area of the air flow path, so as to take advantage of the Venturi effect. That is, the velocity of the air flow increases as the cross sectional area of the flow path decreases and the air flow through a constricted cross section increases in speed. The second air flow path may channel the air towards or away the aerosol generating device at a relatively high velocity. The aerosol generating device comprises a fan. The fan is positioned along the second air flow path. The fan is configured to generate an air flow exiting the second air outlet. The fan may blow air away from the aerosol generating device or it may suck air towards the aerosol generating device. The fan may comprise a propeller or an impeller the direction of rotation of which may be reversed, so that a first direction of rotation and a second (opposite) direction of rotation are defined. In the first direction of rotation, the air may be sucked from the second air inlet and expelled from the second air outlet, while in the second direction of rotation the role of second air inlet and second air outlet is reversed. The second air inlet in the first direction of rotation becomes the second air outlet in the second direction of rotation and the second air outlet in the first direction of rotation becomes the second air inlet in the second direction of rotation. Preferably, in a direction of rotation of the fan, air is drawn in the casing of the aerosol forming article from the second air inlet initially along a direction substantially perpendicular to the longitudinal axis of the casing. Then, in order to exit from the second air outlet, the so formed air flow may bend and form an air flow flowing along a direction substantially parallel to the longitudinal axis of the casing. Preferably, the air flow passes through the fan housing along a direction parallel to the longitudinal axis of the casing. The air flow exits through the second air outlet at the distal end of the aerosol generating article moving along a direction parallel to the longitudinal axis of the casing.

The fan may comprise a fan shaft and fan blades. The fan shaft is preferably mounted parallel to the longitudinal axis of the casing. Preferably, the casing comprises a fan housing. Preferably, the fan is positioned within the fan housing. Preferably, the fan is completely contained in the casing of the aerosol generating device. The fan housing may be tubular-shaped. The fan may be a centrifugal fan or an axial flow fan. Preferably, the aerosol generating device comprises a power source. More preferably, the power source comprises a battery. Preferably, the fan is powered by the power source. Preferably, the same power source powers both the aerosolizer and the fan. Preferably, the power source is housed inside the casing of the aerosol generating device. The power source may be located along the first air flow path. Preferably, the aerosol generating device comprises a controller. The controller may be connected to the fan. The controller may be connected to the fan so that the fan may be commanded by the controller. Additionally, the aerosol generating device may comprise an actuator, which is connected to the controller. The actuator may be provided on the casing of the aerosol generating device. The actuator, when for example operated by a user, may select a "aerosol trick" mode, in which the fan is switched on via the controller. Several different "aerosol trick" profiles may be present. The actuator may select a "normal" mode, for standard production and inhalation of aerosol.

The air flowing through the second air flow path may be ejected with force from the aerosol generating device due to the fan action. An air flow external to the aerosol generating device is thus generated. This air flow can be used during the formation of "aerosol tricks".

At least in a configuration of the aerosol generating article, the first air flow path and the second air flow path are fluidly separated one from the other. Air enters either the first air flow path through the first air inlet or air enters the second air flow path through the second air flow inlet. Air entering the first air flow path may not travel in the second air flow path before first exiting the first air flow path. Air entering the second air flow path may not travel in the first air flow path before first exiting the second air flow path. For example, an airtight separator may be placed inside the casing of the aerosol generating device to fluidly divide the first air flow path from the second air flow path. The airtight separator may comprise air airtight wall longitudinally dividing in two the casing of the aerosol generating device.

In some embodiments, there may be one or more different configurations of the aerosol generating article in which the first air flow path and the second air flow path are in fluid communication.

Preferably, the casing of the aerosol generating device is divided in two portions, in contact with each other. The first portion preferably comprises the mouth end. The second portion preferably comprise the distal end opposite to the mouth end. The first portion may comprise the first air flow path and the second portion may comprise the second air flow path. The first air inlet and the first air outlet may be formed on the first portion. The second air inlet and the second air outlet may be formed on the second portion. The first portion may comprise the substrate housing. The second portion may comprise the fan housing. The first portion may comprise the controller. The first portion may comprise the power source. The first portion and the second portion may be divided by the airtight separator.

The airtight separator may comprise a wall. For example, the airtight separator may comprise a wall of the fan housing. The airtight separator may comprise a wall of the fan housing. The airtight separator may comprise an airtight membrane. When the aerosol generating device is operated in the "normal" mode, the user uses the first air flow path to inhale aerosol and the fan is switched off. The "normal" mode may be selected using the actuator. When the aerosol generating device is used in "aerosol trick" mode, the first air flow path may be still used to generate aerosol which is inhaled by the user. The "aerosol trick" mode may be selected using the actuator. The second air flow path is used to generate an air flow external to the aerosol generating device by the fan's rotation. The user may exhale the previously inhaled aerosol via the mouth or nostrils and may shape or control its flow by the air flow exiting the second air flow path.

Thus, if the user generates a cloud of aerosol, inhaled from the first air flow path and exhaled via their mouth or nose, the shape and movement of the cloud of aerosol can be modified or determined by the air flow generated by the aerosol generating device due to the fan action and emitted through the second air flow path. The formation of aerosol clouds of complex forms is simplified. Even beginner users may be able to produce aerosol tricks without extensive training. Control of the aerosol cloud is improved.

Preferably, the aerosol generating device comprises a casing defining a fan housing, the fan being located inside the fan housing, wherein the second air flow path is at least partially defined by the fan housing. Preferably, the second air flow path extends through the fan housing so that an air flow flowing in the second air flow path is exposed to the fan blowing action. Preferably, the fan is located inside the fan housing within the casing so that contacts between the fan and the user are avoided. Preferably, the fan comprises a fan shaft. Preferably, the fan is located inside the fan housing with the fan shaft parallel to the longitudinal axis. A good control of the air expelled by the aerosol generating device may be achieved. Preferably, the second air inlet or the second air outlet is realized in the fan housing so that the air is drawn into or expelled from the fan housing. Preferably, air is expelled from the casing of the aerosol generating device along a direction parallel to the longitudinal axis of the casing. Preferably, air is drawn into the casing of the aerosol generating device along a direction perpendicular to the longitudinal axis of the casing. The fan housing may extend from the distal end of the casing of the aerosol generating device. Preferably, the fan housing extends from the distal end toward the mouth end of the casing. Preferably the second air inlet or the second air outlet is formed at the distal end to draw or expel air parallel to the longitudinal axis of the casing.

Preferably, the second air inlet or the second air outlet comprises a plurality of apertures formed in the fan housing, said plurality of apertures forming a spiral shape around the casing. The fan housing is preferably tubular-shaped. The fan housing comprises a tubular wall. Preferably, the second air inlet or the second air outlet is formed as apertures through the tubular wall. The second air inlet or the second air outlet may comprise apertures realized all around the casing of the aerosol generating device. The apertures are preferably formed in the fan housing. The second air inlet or the second air outlet apertures may define a spiral shape around the housing. The spiral shape preferably includes a three-dimensional spiral. Preferably, the three-dimensional spiral has an axis coinciding with the longitudinal axis of the casing. Among the three-dimensional spirals, preferably a helix is formed on the casing of the aerosol generating device. Preferably, the helix is circular, being the casing preferably circular. Preferably, the helix has an axis coinciding with the longitudinal axis of the casing. Preferably, the length of the helix, that is, the length spanned by the helix along the longitudinal axis of the casing, is equal to or longer than the distance between the fan and the distal end. Preferably, the helix is an anti-clockwise helix when looking at the distal end of the aerosol generating device where the second air outlet is located. The plurality of apertures may have different shapes. For example, the apertures may be circular, rectangular or oval. The spiral shape may be defined by virtually drawing a spirally- shaped line around the casing of the aerosol generating device and connecting the apertures along the spirally-shaped line. The apertures may be formed at a given distance one from the other. The distance between two consecutive apertures along the spirally-shaped line may be the same among all couples of neighbouring apertures, or it may change. The plurality of apertures may be slit-shaped. In this embodiment, the plurality of apertures form at least a spiral aperture, that is, a spirally-shaped aperture, in the casing of the aerosol generating device. The plurality of apertures may form spiral "slits" on the casing. The spiral slits together form the spiral shape. Preferably, the second air inlet comprises a plurality of apertures formed in the fan housing, said plurality of apertures forming a spiral shape.

Due to the Venturi effect, when the air is expelled away from the aerosol generating device from the second air outlet, the outside air is sucked inside the spirally-shaped second air inlet. This air sucked in in turn modifies the expelled air movement, creating a kind of vortex or spiralling movement of the expelled air. This is due to the fact that the speed of the air inside the casing may be, if the aerosol generating device is motionless or move slowly reported to the speed of the air inside the casing, superior to the speed of the air outside the casing and therefore the inside air pressure is lower the outside air pressure. A similar vortex may be created if the apertures forming a spiral shape are the second air outlet. Preferably, the second air inlet or the second air outlet defines an air flow cross section, the air flow cross section being configured such that one or more dimensions of the cross section is adjustable. The air flow cross section is the cross section as experienced by the flow of air entering or exiting the second air flow path. As already mentioned, the speed of the air flow depends on the size of the air inlet or air outlet. Therefore, in order to have wide range of control over the speed of the air drawn into or expelled from the aerosol generating device, the cross section of the second air inlet or of the second air outlet or of both, is changeable. The cross section may have an area which is adjustable. The adjustable area may be comprised between a maximum area and a minimum area. The second air inlet or the second ait outlet may comprise a shutter to adjust their air flow cross section. The shutter may be slidable so as to cover more or less of the air flow cross section. The shutter may function as a camera shutter. For example, sliding flaps or iris openings may be used to change the area of the cross section defined by the second air inlet or second air outlet. In this way, the air flow entering or exiting the second air flow path may experience a second air inlet or a second air outlet which may have a more or less restricted cross section. An adjustable cross section may consequently adjust the speed of the air flow flowing in the second air flow path. Preferably, the aerosol generating device comprises a partition movable between a first position and a second position, wherein, when the partition is in the first position, the first air flow path and the second air flow path are in fluid communication and wherein, when the partition is in the second position, the first air flow path and the second air flow path are fluidly isolated. The whole partition may be movable between a first and a second position, or just part of the partition may move. For example, the whole partition or a part thereof may slide in order to open a passageway connecting the first air flow path to the second air flow path. For some aerosol tricks, the aerosol clouds to be shaped may be produced not only by the user by inhaling the aerosol via the first air flow path, but also it may be expelled from the second air outlet of the second air flow path. In this case, aerosol produced in the first air flow path may flow into the second air flow path to be pushed by the fan. In this way, complex aerosol shapes may be created. Preferably, the aerosol generating device comprises a casing and the partition is located within the casing. The partition may also be a part of one of the wall of the fan housing.

The partition may be a whole wall of the fan housing. Preferably, the aerosol generating article defines a longitudinal axis and the partition is substantially perpendicular to the longitudinal axis.

Preferably, the aerosol generating device comprises a fan controller adapted to vary an operation parameter of the fan. For example, the operation parameter may be the value of the speed of the fan, the speed pattern of the fan or the rotation direction of the fan. The fan controller may be comprised in the fan or may be part of the controller of the aerosol generating device. Preferably, the operation parameter is adjusted depending on the type of aerosol tricks to be formed. The fan may be configured to operate according to different speed patterns, alternatively selectable. For example, when the fan is switched on, its speed may remain different from zero till the fan is switched off. Alternatively, the speed pattern may comprise a plurality of "bursts", that is, a first interval in which the speed of the fan is different from zero is followed by a second interval in which the speed of the fan is equal to zero and the sequence of first interval followed by second interval is repeated several times till the fan is switched off. The speed of the fan may be constant or it may accelerate or it may decelerate according to the selected speed pattern. The "speed of the fan" is defined as the rotational speed of the blades of the fan. The fan controller may be used to switch from one operation parameter to another operation parameter of the fan. For example, the aerosol generating device may comprise a memory where several operation parameters of the fan may be stored. The fan controller is connected to the memory in order to select an operation parameter for the fan. A fan operation parameter may comprise a constant speed value to be maintained when the fan is switched on. Another fan operation parameter may comprise a periodic variation according to a given frequency of the fan' speed. Another fan operation parameter may comprise a clockwise direction of rotation of the fan. The fan controller may be part of the aerosol generating device's controller. The fan controller may operate on the power supply of the fan or of the aerosol generating device.

The fan controller may be operated manually or automatically. The fan controller may be operated by the user, for example via a fan actuator positioned in the casing of the aerosol generating device. The fan actuator may be integrated with the actuator of the aerosol generating device. Alternatively or in addition, the fan controller may be connected to one or more sensors. The one or more sensors may emit signals in response to sensed parameters. The one or more sensors may comprise an accelerometer. The one or more sensors may comprise an aerosol forming substrate detector, adapted to determine the type of aerosol forming substrate inserted in the aerosol generating device. The one or more sensors may comprise a temperature sensor to determine a heat profile of the air flowing in the first air flow path. Depending on one or more of the sensed parameters, the fan parameters may be changed automatically by the fan controller in order to choose the optimal setting for the sensed parameters to obtain the best aerosol tricks. Preferably, the aerosol generating device comprises: an aerosolizer adapted to heat the aerosol forming substrate received by the aerosol generating device. More preferably, the aerosol generating device comprises an actuator for the aerosolizer, the actuator being adapted to alternatively select a heating profile on the basis of an operation parameter of the fan. Preferably, the aerosol generating device comprises an aerosolizer comprising a heating element. The heating element is adapted to heat the aerosol forming substrate when inserted in the aerosol generating device: For example, the heating element is inserted in the substrate housing of the casing. The heating element may function according to one or more heating profile. In each different heating profile, the aerosol forming substrate may be heated differently, for example at different temperatures. Depending on the selected heating profile, a characteristic of the aerosol generated by the aerosol forming substrate may vary, for example it may vary in quantity or in flavour. Preferably, the heating profile is selected by means of an actuator. The heating element actuator may select the heating profile on the basis of an operation parameter of the fan. The operation parameter may be the speed of the fan. For example, if the fan is switched off so that its speed is equal to zero, no aerosol tricks are desired and the actuator may select a heating profile aiming to give optimized taste of the aerosol. Generally an optimization of taste corresponds to a relatively low production of aerosol. On the other hand, if the fan is switched on so that its speed is different from zero, the actuator may select a heating profile aiming to give optimized generation of aerosol when it comes to its visual size or quantity. This selection may corresponds to a sub-optimal aerosol taste.

Preferably, the aerosol generating device comprises: a battery to charge the fan. Preferably, the aerosol generating device comprises a single power source to power the aerosolizer and the fan. More preferably, the power source comprises a battery. The battery may be inserted in the casing of the aerosol generating device. Preferably, the battery is located in the first portion of the casing. Preferably, the aerosol generating device comprises a light source adapted to emit light. The light source may emit a light beam outside the casing of the aerosol generating device. Advantageously, providing the aerosol generating device with a light source may provide improved control of the illumination of the aerosol created by the user in the aerosol tricks. The aerosol generating device may provide both an air flow to shape the aerosol cloud via the fan and a light to colour or write on the aerosol cloud via the light source, to obtain improved aerosol tricks.

The light source may comprise a light source arranged to emit light in the visible light range of the electromagnetic spectrum. Preferably, the light source is configured to emit light comprising at least one wavelength between 380 nanometres and 700 nanometres. The light source of the aerosol-generating device may comprise at least one of a light emitting diode (LED) and a laser. Advantageously, light emitting diodes and lasers may have a compact size suited to use in an aerosol generating device. The light sources of the aerosol generating device may not require a relatively large voltage to be operated. For example, the light source of the aerosol generating device may comprise one or more light emitting diodes

(LEDs). This may allow for a safer and more cost effective power source to be used to power the device. Further, light beam of several colours can be easily provided. Using a laser as the light source, may enable the emission of light within a relatively narrow range of wavelengths. The laser may comprise at least one of a solid state laser and a semiconductor laser. Laser source may allow to obtain "laser writing" on the aerosol generated by the user. The user may therefore projects messages onto the aerosol generated by the aerosol generating device.

More preferably, the aerosol generating device defines a longitudinal axis, and the light source is adapted to emit a light beam along a direction parallel to the longitudinal axis of the aerosol generating device. Preferably, the longitudinal axis of the aerosol generating device and the longitudinal axis of the casing coincide. More preferably, the air flow propelled by the fan and exiting the second air outlet is also moving along a direction substantially parallel to a longitudinal axis of the aerosol generating device. The user may easily determine the direction in which to point the aerosol generating device in order to obtain both an illumination and a shaping of the desired portion of the aerosol.

Preferably, the light source is located at the distal end of the aerosol generating device. In order to illuminate the aerosol, the user may hold the aerosol generating device in the same way as when inhaling aerosol.

Preferably, the aerosol generating device defines a longitudinal axis, and the fan is configured to generate an air flow, flowing along the second air flow path, which exits the second air outlet along a direction parallel to the longitudinal axis of the aerosol generating device. At the second air outlet, the air flow flowing along the second air flow path may have a direction substantially parallel to the longitudinal axis of the aerosol generating device. The combination of light beam emitted by the light source and the air expelled by the aerosol generating device along the same direction may help to create aerosol tricks.

Preferably, the aerosol generating device comprises a wireless communication interface to connect the aerosol generating device to a network. Preferably, the wireless communication interface is part of the controller of the aerosol generating device. The controller can therefore receive data from the network. The data may be relative to a movement pattern to be followed by the fan or information relative to the aerosol forming substrate introduced in the aerosol generating device. Further, the controller, via the wireless communication interface, may upload data to the network, for example statistics relative on the number of times the fan had been activated.

In another embodiment, the invention relates to a system for aerosol tricks configured to be used with an aerosol generating device and an aerosol forming substrate. The system for aerosol tricks may comprise a fan and a system controller adapted to control the fan. The system for aerosol tricks may also comprise an aerosol detector adapted to detect the presence of aerosol produced by said aerosol generating device and configured to send a signal to the system controller based on the presence of aerosol. The system controller is configured to activate the fan in response to the signal received from the aerosol detector.

In some embodiments, a fan is provided. The fan is activated by means of a system controller. The system controller may for example control the speed or the direction of rotation of the blades of the fan. The system controller activates the fan depending on a signal sent by an aerosol detector. The aerosol detector may detect aerosol, for example produced by the aerosol generating system. Thus, if aerosol is present, such as aerosol clouds produced by the user puffing on the aerosol generating device, the aerosol detector detects the aerosol and sends a signal to the system controller which activates the fan. The fan produces an air flow. If no aerosol is detected, preferably no signal is sent by the aerosol detector. Preferably, no activation of the fan takes place. No air flow is preferably generated. Aerosol tricks can be created using the air flow generated by the fan which moves or shapes the aerosol, when the fan is activated. Improved aerosol tricks may be realized. The fan of the system for aerosol tricks is preferably external to the aerosol generating system.

The aerosol generating system comprises an aerosol generating device and an aerosol forming substrate inserted in the aerosol generating device. The aerosol generating device comprised in the aerosol generating system which may be used together with the system for aerosol tricks according to the invention may comprise the aerosol generating device according to the embodiments of the invention as hereinbefore described.

A single fan or a plurality of different fans may be comprised in the system for aerosol tricks of the invention.

Preferably, the aerosol detector comprises an optical aerosol detector. Preferably, the aerosol detector comprises a light emitter and a light receiver. The light emitter may comprise a source capable to emit an infrared beam and the light receiver may comprise a photoreceptor.

Preferably, the aerosol detector is adapted to send a first signal to the system controller based on the presence of aerosol when the detected amount of aerosol is above a given threshold. Preferably, the aerosol detector is adapted to send a second signal to the system controller when the detected amount of aerosol is below a second given threshold. Preferably, the system detector or the system controller is configured to switch on the fan when the first signal is received. Preferably, the system detector or the system controller is configured to switch off the fan when the second signal is received. Preferably, the system for aerosol tricks comprises a light source adapted to emit a light beam; wherein the system controller is adapted to control the light source and wherein the system controller is configured to activate the light source n response to the signal received from the aerosol detector. In addition to the formation of an air flow by the fan, a light beam may be emitted by a light source. Preferably, the light source is external to the aerosol generating system. Preferably, the light beam is emitted towards the aerosol detected by the aerosol detector. The system for aerosol tricks may comprise a single light source or a plurality of different light sources. The light source may emit a light beam in one of the primary colours. Preferably, several light sources are provided for emitting a light beam in each one of the primary colours. Light sources emitting light beam in different primary colours may be combined to create a great number of colours (for instance combination of one or more of: Red, Blue and Green LEDs or lasers). The light source may have a relatively large beam radius so that it may be used to create a large area of coloured light providing ambience light (for instance the light source may be a LED light source). This light source may comprise a laser source. The various parameters of the light sources (directions of the beam, kind of light sources, colours of the emitted light beam or others) may be set to produce specific light effects controlled by the system controller.

Preferably, the fan is adapted to generate an air flow along a given direction and the fan comprises an air flow redirecting element so as to change the given direction of the air flow. More preferably, the system controller is configured to actuate the air flow redirecting element. The aerosol can be hit by the air flow in many different positions.

Preferably, the fan is a variable speed fan. More preferably, the system controller is configured to vary the speed of the fan. The speed of the fan may be regulated depending on the desired aerosol trick. For example, the fan may blow or suck an air flow along a given direction. This given direction may be changed, for example by rotating the fan along an axis not parallel to the given direction of the air flow. The given direction may be changed by means of flaps that can be oriented in different directions so as to orient the air flow blown or sucked by the fan. Preferably, the light source is adapted to generate a light beam along a given direction and the light source comprises a beam redirecting element adapted to change a direction of the light beam emitted by the light source. More preferably, the system controller is adapted to actuate the beam redirecting element. The light source may emit a light beam having a main component of the electromagnetic radiation along a given direction. This given direction may be changed, for example rotating the light source along an axis not parallel to the given direction of the light beam. The given direction may be changed by using a suitable optics to change the orientation of the light beam. A change of orientation of the main component of the air flow or of the light beam may allow to modify the air flow or light beam according to the aerosol tricks to be performed. The light beam or the air flow or both may "follow" the aerosol cloud while the latter travels.

Preferably, the system for aerosol tricks comprises a mirror to reflect the light beam emitted by the light source. Improved illumination of the aerosol may be achieved.

Preferably, the light source is adapted to emit a light beam in different colours. More preferably, the colour of the light beam is selectable by the system controller. Preferably, the system comprises a sound generator. More preferably, the system controller is adapted to control the sound generator. Even more preferably, the system controller is configured to activate the sound generator in response to the signal received from the aerosol detector. Any suitable sound generator may be used to produce sound. The sound generator may produce sound that covers at least the human audible range. The sound may cover at least a frequency range up to about 20 kHz, or at least between about 20 Hz and about 20 kHz. The sound may be formed of a plurality of frequencies. The decibel level capable of being produced at each of the frequencies may be sufficient to be heard by a user of the sound generator. The decibel levels may be adjustable. The sound produced may be simple or high fidelity. An example of a simple sound may be the sound of a buzzer. Examples of high-fidelity sound comprise a crackling sound, a voice, or white noise. Preferably, the sound generator can produce high-fidelity sound. The sound generator may produce sound by vibrating a membrane or compressing air to produce the sound. Preferably, the sound generator compresses air to produce sound. In some embodiments, the sound generator may use digital sound reconstruction (DSR). With DSR, the sound may be produced by the sound generator as a summation of discrete pulses produced from the array of pressure- generating drivers. Utilizing DSR may produce more accurate reproduction and less distortion than a conventional analogue speaker, which varies the timing of the motion of a membrane. The sound generator may be a digital speaker. The sound generator may respond to digital signals. Digital sound data may be stored in memory and provided as one or more digital signals to the sound generator. The sound generator is preferably controlled by the system controller, so that the sound generator may be activated when aerosol is detected.

Preferably, the system comprises a video projector. More preferably, the system controller is adapted to control the video projector. Even more preferably, the system controller is configured to activate the video projector in response to the signal received from the aerosol detector. A video may be projected onto the aerosol cloud.

Preferably, the system comprises a user interface device including a communication interface to communicate with the system controller. Preferably, the system comprises a user interface device including a communication interface to communicate with the aerosol generating device. The user interface device may also comprise a display having a user interface to present one or more graphical elements to configure the aerosol generating device or the system controller. The user interface device may further comprise a user controller operably coupled to the display and communication interface. The user controller may be configured to display the one or more graphical elements on the display. The user controller may also be configured to allow a user selection using the one or more graphical elements via the user interface to configure the aerosol generating device or the system controller. The user controller may further be configured to communicate with the aerosol generating device or the system controller using the communication interface to configure the aerosol generating device or the system controller based on the user selection. In one or more embodiments, the user selection may define one or more of: a type of aerosol forming substrate, a specific aerosol trick, a sound mode, an instruction mode, an error message mode, an operational message mode, a substrate detection mode, a substrate selection mode, a data download mode, a configuration mode, a volume level, and an audio quality level. Any suitable communication interface may be used to communicate to the to the aerosol generating device or with the system controller. The communication interface may be wireless, wired, or both. An example of a wireless interface utilizes Bluetooth, such as Bluetooth Low Energy (BLE). An example of a wired interface utilizes a universal) serial bus (USB). Preferably, also the aerosol generating device or the system controller comprises a communication interface.

The aerosol generating device and the system controller may be used without the user interface device. However, the user interface device may enable various functionalities and provide a user-friendly manner of configuring the aerosol generating device and the system controller.

The user interface device may be any suitable device to accept a user selection and communicate with the aerosol generating system or the system controller. The user interface device may communicate a configuration to the aerosol generating system or to the system controller. In some embodiments, the user interface device may be a smartphone or tablet with an application to facilitate communication with the aerosol generating device or system controller.

The user interface device may comprise a communication interface, a display, and a user controller. The communication interface may communicate with the communication interface of the aerosol generating device. The display may comprise a user interface engageable by a user to configure the aerosol generating device or system controller, such as a touch screen, to accept user selections. The display may present one or more graphical elements to configure the aerosol generating system. The controller may be operably coupled to the display and the communication interface.

According to another embodiment, the invention relates to a kit including the system for aerosol tricks according to the second aspect and an aerosol-generating device. The aerosol generating device may be substantially as the aerosol generating device hereinbefore described. The kit may comprise an aerosol forming substrate for use with the aerosol generating device. The aerosol detector of the system for aerosol tricks is adapted to detect the presence of aerosol produced by said aerosol generating device and aerosol forming substrate as hereinbefore described.

The schematic drawings are not necessarily to scale and are presented for purposes of illustration and not limitation. The drawings depict one or more embodiments described in this disclosure. However, it will be understood that other embodiments not depicted in the drawings fall within the scope and spirit of this disclosure. Referring now to the drawings, in which some embodiments of the present invention are illustrated.

FIG. 1 is a schematic lateral view of an aerosol generating system comprising an aerosol generating device according to an embodiment of the present invention; - FIG. 2 is a lateral view in section of the aerosol generating system of figure i;

FIG. 3 is a schematic diagram showing the aerosol generating system of figures 1 and 2 in use;

FIG. 4 is a schematic perspective view of an aerosol generating system according to another embodiment of the present invention; and FIG. 5 shows a schematic view of a system for aerosol tricks according to the invention used with an aerosol generating system.

Figures 1 and 2 show a first embodiment of an aerosol generating system 10 comprising an aerosol generating device 20 and an aerosol forming substrate 30 for use with the aerosol generating device 20.

The aerosol generating device 20 comprises a cylindrical tubular casing 21 defining a longitudinal axis 22. The casing 21 comprises a first distal end 23 and an opposite second distal end 24. At the second distal end 24 a mouthpiece 25 is positioned. The casing 21 comprises a first housing 26 (as shown in figure 2) configured to receive the aerosol forming substrate 30. The first housing 26 is located adjacent to the mouthpiece 25. The casing 21 comprises a first plurality of inlets, all indicated with 27, in the form of apertures formed circumferentially around the casing. A first air outlet 28 is defined as an aperture at the mouthpiece 25. The first plurality of inlets are fluidly connected to the first air outlet forming a first air flow path 60. In figure 2, the first air flow path 60 is indicated with dashed arrows. The aerosol generating device 20 comprises an aerosolizer 29 located within casing 21. Preferably, the aerosolizer 29 comprises a heating element 41 to heat the aerosol forming substrate 30.

The aerosol generating device 20 comprises electronics 31. The electronics 31 comprises an electrical energy supply 12, for example a rechargeable lithium ion battery. The electrical supply 12 is adapted to power the aerosolizer 29.

The aerosol generating device 20 further comprises a controller 14 and an actuator 15. The actuator 15 is mounted on an external surface of the casing 21. The electrical supply 12 is adapted to power the controller 14 and the actuator 15. Actuator 15 comprises a first button 16 for selecting an "aerosol tricks" operation mode and a second button 17 for selecting a "normal" operation mode of the aerosol generating device 20. Actuator 15 is connected to the controller 14 and is adapted to send signals to the controller 14.

The aerosol generating device 20 further comprises a second plurality of air inlets, all indicated with 32, in the form of apertures formed circumferentially around the casing 21. It further comprises a second air outlet 33 at the first distal end 23 opposite to the second distal end 24. The role of second air inlets 32 and second air outlet 33 may be reversed. The second plurality of inlets are fluidly connected to the second air outlet forming a second air flow path 70. In figure 2, the second air flow path 70 is indicated with continuous arrows.

Casing 21 comprises a fan housing 34. The fan housing 34 and the substrate housing 26 are located along the longitudinal axis 22 of the casing 21. The fan housing 34 comprises the first distal end 23.

The aerosol generating device 20 further comprises a fan 35 disposed in the fan housing 34. The fan 35 is connected to the controller 14 and is powered by the electrical energy supply 12. Further, operation parameters of the fan 35 may be set by the user via the actuator 15, for example by further buttons present in the same (not shown in the drawings). Fan 35 incudes a fan shaft 39 positioned parallel to the longitudinal axis 22.

The fan 35 draws air from the second air inlets 32 and expels it via the second air outlet 33. The air drawn in the second air inlets travels through the second air flow path 70 till the second air outlet 33. The first and second air flow paths 60, 70 are fluidly separated by a partition or airtight wall 36. The partition wall 36 separates the casing 21 in two longitudinally adjacent portions, visible in figure 1, a first portion 37 containing the mouthpiece 25, the first housing 30, the aerosol forming substrate 30, the controller 14, the power supply 12, the heating element 41 and the first air flow path 60 and a second portion 38 containing the distal end 23, the fan housing 34, the fan 35 and the second air flow path 70. The aerosol generating device 20 comprises a light source 43, which is connected to the casing 21 at the distal end 33. The light source 43 is adapted to create a beam of light 44 along a direction substantially parallel to the longitudinal axis 22. In the illustrated embodiment, the light source 43 comprises a light emitting diode (LED). The controller 14 is also communicably coupled to the light source 43. Light source 43 is powered by the electrical energy supply 12.

In operation, as depicted in figure 3, a user, identified with the stylized drawing of a mouth 47, puffs on the mouthpiece 25. The puffing draws air from an environment external to the aerosol generating system 10 into the aerosol generating system 10 thought the first air inlets 27. The air drawn into the aerosol generating system 10 flows through the first air inlets 27, along the first air flow path 60. One or more volatile components of the aerosol forming substrate 30 are released from the aerosol forming substrate 30, for example by heating of the aerosol forming substrate 30 by the heating element 41. The drawn in air and the volatilised components form an aerosol. The aerosol continues to flow along the first air flow path 60, exiting the aerosol generating system 10 through the first air outlet 28. The first air outlet is formed in the mouthpiece 25. From the mouthpiece 25, the aerosol enters the user's mouth. The user 47 can then exhale the aerosol from the mouth or nostrils creating aerosol clouds 48. If the actuator 15 is positioned in "normal" mode via button 16, the second air flow path 70 is not used. However, if the actuator 15 is switched in "aerosol trick" mode via button 17, the fan 35 is activated by the controller 14. Air from an environment external to the aerosol generating system 10 is drawn in to the aerosol-generating system through second air inlets 32. The air drawn into the aerosol generating system 10 through the second air inlets 32 enters the second air flow path 70 upstream of the fan 35. The air continues along the second air flow path 70, past the fan, exiting the aerosol generating system 10 via the second air outlet 33. The shape and speed of the air flow 46 emitted by the second air flow outlet 33 may vary depending on fan operation parameters (for example, speed) and on second air inlet and second air outlet parameters (for example, shape, number, distribution).

For example, as depicted in figure 4, the second air inlets 32 formed on the casing 21 at the fan housing 34 are arranged distributed in a helical shape 55 as shown by the dotted line connecting the second air inlets 32. The resulting air flow 46 blown out of the aerosol generating device 20 by the fan 35 from the second air outlet 33 has a vortex-shape.

As shown in figure 3, the user 47 can puff aerosol clouds 48 made of the aerosol inhaled from the aerosol generating system 10. The aerosol clouds 48 can be pushed, shaped or otherwise modified by the resulting air flow 46. Further, the light source 43 may be activated by the controller 14. The controller 14 may activate the light source 43 to generate a light beam 44. In those embodiments, the user may use the light beam 44 to illuminate the aerosol clouds 48. This may improve the resulting aerosol trick. The partition wall 36 may be movable. For example, partition wall 36 can be moved such that the first and the second air flow paths 60, 70 are in fluid communication. In addition to flowing in the first air flow path 60 to the user's mouth, aerosol can also simultaneously flow in the second air flow path 70, past the fan 35 and out through the second air outlet 33. The aerosol flowing out of the second air outlet 33 may produce additional aerosol clouds 49.

With reference to figure 5, the system of the invention 100 for use with an aerosol generating device is shown. The aerosol generating device may be the aerosol generating device of figures 1 to 4 or another aerosol generating device. In the following, reference is made to aerosol generating device 20 and aerosol generating system 10 as an example.

The system 100 comprises a fan 101 emitting an air flow. Preferably, fan 101 is housed in a casing 109 and the air flow exits the casing for example through an outlet 102. Preferably, the air flow generated by fan 101 flows along a first direction 103. The fan 101 is external to the aerosol generating system 10.

The system 100 further comprises a laser source 108, in this example connected to the fan 101. Fan 101 and laser source 108 have a common casing 109 in which both the fan 101 and the laser source 108 are housed. The laser source 108 is schematically depicted as a dotted rectangle in figure 5, being not visible from the outside of casing 109. The laser source 108 emits a laser beam along a second direction 104. The laser beam exits casing 109 via an aperture 112 formed in the casing 109. Laser source 108 is external to the aerosol generating system 10. Indeed, the system 100 may be separate and completely distinct from an aerosol generating system 10. For example, the system 100 may be a hand-held device which a user may use whilst also using an aerosol generating system 10. In other embodiments, the system 100 may be configured for use in conjunction with an aerosol-generating system. For example, the system 100 may comprise connection means for connecting the system 100 to an aerosol generating device.

The system 100 also comprises an aerosol detector comprising an emitter 105 and a receiver 106 to detect the presence of aerosol.

A controller 107 is connected to the fan 101, laser source 108 and aerosol detector 105, 106. The controller 107 is arranged to control one or both of the fan 101 and the laser source 108. The controller 107 is arranged to receive signals from the emitter 105 and the receiver 106 of the aerosol detector.

If the aerosol detector 105, 106 detects an aerosol cloud 111, which may be, for example, emitted by the aerosol generating system 10 or by a user exhaling after puffing on the aerosol generating system 10, the aerosol detector sends a signal to the controller 107. The controller 107 activates the fan 101 and the laser source 108 so that the aerosol cloud 111 is illuminated and affected by the air flow generated by the fan 101. For example, the aerosol cloud 111 may also be divided in smaller aerosol clouds 110 by the air flow, which become scattered in different directions.

The exemplary embodiments described above are not intended to limit the scope of the claims. Other embodiments consistent with the exemplary embodiments described above will be apparent to those skilled in the art.

Claims

1. An aerosol generating device for receiving an aerosol forming substrate, the aerosol generating device comprising: a casing defining a fan housing; a mouth end; a distal end opposite to the mouth end; a first air inlet; a first air outlet located at the mouth end; a first air flow path defined between the first air inlet and the first air outlet; a fan, the fan being located inside the fan housing; a second air inlet; a second air outlet; a second air flow path defined between the second air inlet and the second air outlet, the fan being located along the second air flow path, wherein said second air flow path is at least partially defined by said fan housing; wherein the first air flow path is fluidly separated from the second air flow path and wherein the second air inlet or the second air outlet comprises a plurality of apertures formed in the fan housing, said plurality of apertures forming a spiral shape around the casing.

2. The aerosol generating device according to claim 1, wherein the fan housing is disposed at the distal end.

3. The aerosol generating device according to any of the preceding claims, wherein the second air inlet or the second air outlet defines an air flow cross section, the air flow cross section being configured such that one or more dimensions of the cross section is adjustable.

4. The aerosol generating device according to any of the preceding claims, comprising a partition movable between a first position and a second position, wherein when the partition is in the first position, the first air flow path and the second air flow paths are in fluid communication and wherein when the partition is in the second position the first air flow path and the second air flow path are fluidly isolated.

5. The aerosol generating device according to any of the preceding claims, wherein the aerosol generating device comprises: a fan controller adapted to vary an operation parameter of the fan.

6. The aerosol generating device according to any of the preceding claims, comprising: an aerosolizer adapted to heat the aerosol forming substrate received by the aerosol generating device.

7. The aerosol generating device according to claim 6, wherein the aerosol generating device comprises an actuator for the aerosolizer, the actuator being adapted to alternatively select a heating profile on the basis of an operation parameter of the fan.

8. The aerosol generating device according to any of the preceding claims, wherein the aerosol generating device comprises: a light source adapted to emit light.

9. The aerosol generating device according to claim 8, wherein the aerosol generating device defines a longitudinal axis, and wherein the light source is adapted to emit a light beam along a direction parallel to the longitudinal axis of the aerosol generating device.

10. The aerosol generating device according to any of the preceding claims, wherein the aerosol generating device defines a longitudinal axis, and wherein the fan is configured to generate an air flow, flowing in the second air flow path, which exits the second air outlet along a direction parallel to the longitudinal axis of the aerosol generating device.

11. The aerosol generating device according to any of the preceding claims, wherein the aerosol generating device comprises: wireless communication interface to connect the aerosol generating device to a network.

12. A system for aerosol tricks, the system configured to be used with an aerosol generating device and an aerosol forming substrate, the system for aerosol tricks comprising: a fan; a system controller adapted to control the fan; an aerosol detector adapted to detect the presence of aerosol produced by said aerosol generating device and configured to send a signal to the system controller based on the detection of aerosol by the aerosol detector; wherein the system controller is configured to activate the fan in response to the signal received from the aerosol detector.

13. The system according to claim 12, comprising: a light source adapted to emit a light beam; wherein the system controller is adapted to control the light source and wherein the system controller is configured to activate the light source in response to the signal received from the aerosol detector.

14. The system according to claim 12 or 13, wherein the aerosol detector is adapted to send a first signal to the system controller based on the presence of aerosol when the detected amount of aerosol is above a given threshold or the aerosol detector is adapted to send a second signal to the system controller when the detected amount of aerosol is below a second given threshold.

15. The system according to claim 14, wherein the system controller is configured to switch on the fan when the first signal is received, or the system controller is configured to switch off the fan when the second signal is received.