EP4723912A1

EP4723912A1 - Aerosol generation device, apparatus, and method

Info

Publication number: EP4723912A1
Application number: EP24746762.4A
Authority: EP
Inventors: Alec WRIGHT
Original assignee: JT International SA
Current assignee: JT International SA
Priority date: 2023-08-09
Filing date: 2024-07-31
Publication date: 2026-04-15
Also published as: KR20260040079A; WO2025031909A1; CN121620307A

Abstract

The present disclosure relates to aerosol generation device configured to receive a consumable article, the aerosol generation device comprising: an energy provision assembly configured to provide energy to the consumable article; and a controller configured to: control the energy provision assembly in a first mode to control a temperature of the consumable article; and control the energy provision assembly in a second mode to control electrical power provided by the energy provision assembly to the consumable article, wherein the controller is configured to switch operation of the energy provision assembly between the first mode and the second mode.

Description

Aerosol generation device, apparatus, and method

The present disclosure relates to an aerosol generation device, to an apparatus for an aerosol generation device, and to a method of operating an aerosol generation device.

Background

Various devices and systems are available that heat a consumable article to release aerosol (i.e. vapour) for inhalation, rather than relying on burning the consumable article. For example, a solid consumable article may be heated to release an inhalable vapour.

A challenge associated with heating a consumable article rather than burning lies in controlling the heating of the consumable article to prevent overheating. Temperature probes may be employed to monitor the temperature of the consumable article to control the generation of aerosol. However, conventional temperature probes have a slow response time such that their use in controlling temperature of the consumable article may be suboptimal.

Furthermore, in some instances, it is necessary or desired to cause rapid heating of the consumable article. This may be known as “puff on demand” heating, whereby an activation input from a user results in the generation of aerosol for user inhalation. In such cases, it is a challenge to provide a change in temperature from an ambient temperature, or other starting temperature, to a vaporisation temperature in a short period of time to provide rapid aerosol generation but whilst avoiding overheating of the consumable article which could potentially result in charring of the consumable article and a reduced user experience.

More generally, it is desired to provide improved heating control processes in an aerosol generation device.

It is the object of the invention to overcome or avoid at least some of the above referenced problems, or to provide an alternative solution.

Summary According to the present disclosure there is provided an aerosol generation device, an apparatus, and a method of operating an aerosol generation device, including the features as set out in the claims.

According to a first aspect, there is provided an aerosol generation device configured to receive a consumable article, the aerosol generation device comprising: an energy provision assembly configured to provide energy to the consumable article; and a controller configured to: control the energy provision assembly in a first mode to control a temperature of the consumable article; and control the energy provision assembly in a second mode to control electrical power provided by the energy provision assembly to the consumable article, wherein the controller is configured to switch operation of the energy provision assembly between the first mode and the second mode.

Numerous advantages are realised by the controller being configured to control the energy provision assembly in the first mode and second mode (e.g., distinctly, or at separate times, in each of the modes), and further by switching operation of the energy provision assembly between the first mode and the second mode. By the first mode, temperature control is performable, which allows for maintenance of the temperature of the consumable article at a baseline temperature. In examples, the baseline temperature may be close to, but not at or above, a vaporisation temperature. By the second mode, power control is performable, which allows for power (such as pulses of power) to be provided to the energy provision assembly to raise the temperature of the consumable article intermittently and rapidly to at or above the vaporisation temperature. In this way, rapid aerosol generation is achievable, whilst preventing overheating of the consumable article. Furthermore, by switching operation between the first mode and second mode, overheating is prevented, rapid aerosol generation is facilitated, and energy usage is improved. Consistency of the amount aerosol generation may also be obtained.

It will be appreciated by the person skilled in the art that this contrasts with the prior art, in which temperature control may be performed. Due to this, the prior art control has an associated delay between temperature measurement and control of the temperature of the consumable article. This may negatively result in overheating of the consumable article. Furthermore, the prior art inefficiently consumes energy, and results in inconsistent aerosol generation by each heating operation during an aerosol inhalation session. The energy provision assembly may be any type or construction of assembly configured to provide energy to a consumable article. Examples of energy provision assemblies within the scope of the present invention may comprise an electrode assembly, an inductor or inductor assembly, and/or a heater assembly such as a resistive heater assembly. Further examples may additionally or alternatively comprise stimulator assemblies, which can stimulate a consumable article to provide energy thereto, for example mechanical, acoustical or optical stimulation. The energy provision assembly may include one or more energy provision components of the types introduced here or mentioned elsewhere. A highly advantageous example includes an electrode assembly, wherein energy is provided to the consumable article according to the heater in tobacco (HIT) principle, which will be described in greater detail herein. Such an example is advantageous due to efficient and relatively fast generation of heat in the consumable article, which combined with the determination of the amount of energy has the synergistic effect of highly efficient and effective energy usage.

In one example, the controller is configured to: receive an indication from a temperature sensor of a temperature of the consumable article; receive an indication from a power sensor of electrical power provided by the energy provision assembly to the consumable article; control the energy provision assembly in the first mode based on the indication from the temperature sensor; and control the energy provision assembly in the second mode based on the indication from the power sensor.

In this way, control in the first mode and second mode is accurate by use of information or data feedback from the temperature sensor and power sensor. In this way, overheating may be prevented whilst still enabling rapid aerosol generation and improved energy usage. Consistency of the amount aerosol generation may also be obtained.

The indication from a temperature sensor may indicate a, or the, current temperature of the consumable article. Alternatively, the indication from the temperature sensor may allow the calculation, estimation, or prediction of a temperature of the consumable article at a particular point in time (e.g., a future time). The indication from the power sensor may indicate a, or the, power provided by the energy provision assembly to the consumable article. Alternatively, the indication from the power sensor may allow the calculation, estimation, or predication of the power provided by the energy provision assembly to the consumable article at a particular point in time (e.g., a future time).

In one example, the controller is configured to: control the energy provision assembly in the first mode to maintain the temperature of the consumable article at a first target temperature; and control the energy provision assembly in the second mode to provide a pulse of electric power to the energy provision assembly.

Advantageously, the temperature of the consumable article can be maintained at a first target temperature, which may be close to the vaporisation temperature but not at or above the vaporisation temperature. The temperature of the consumable article can then be rapidly increased to or above the vaporisation temperature, to achieve rapid aerosol generation (e.g., as puff on demand aerosol generation), by the provision of the pulse of electric power.

Furthermore, by providing electric power in pulses (e.g., rather than gradual or steady provision of electrical power), rapid heating can be achieved sufficient for a user inhalation and energy consumption is reduced.

In one example, the first target temperature is around 80°C.

In this way, during the first mode the temperature of the consumable article is maintained below the vaporisation temperature. In this way, the consumable article is not expended when not desired by the user, but can be rapidly raised above the vaporisation temperature to deliver aerosol for inhalation by the user. It is possible that a negligible amount of aerosol may be generated, even when below the vaporisation temperature.

In one example, the controller is configured to control the energy provision assembly in the second mode to provide electrical power at a predetermined power level for a first period.

In this way, by the second mode, electrical power can be provided to rapidly raise the temperature of the consumable article above the vaporisation temperature. Puff on demand heating is thereby facilitated, but overheating of the consumable article can be prevented. In one example, the controller is configured to control the energy provision assembly in the second mode to provide electrical power to cause heating to a second target temperature.

In this way, in the second mode the temperature of the consumable article may be rapidly raised to a second target temperature to achieve rapid aerosol generation. Despite this, the consumable article is not overheated.

It will be apparent from the description herein that temperature itself may not be monitored or controlled in the second mode. Instead, the second mode involve power control, which in itself may raise the temperature of the consumable article to the second target temperature. Controlling the power is relative fast compared with controlling temperature as there is not the associated heat-up time delay.

In one example, the controller is configured to switch operation of the energy provision assembly from the first mode to the second mode in response to an activation input.

Advantageously, puff on demand heating is facilitated. Aerosol may thereby be generated only when desired by the user, and indicated or detected from the activation input. Furthermore, energy usage is improved by only switching to the second mode in response to the activation input - that is, only when instructed by the user.

In one example, the controller is configured to switch operation of the energy provision assembly from the second mode to the first mode in response to removal of an activation input.

Advantageously, efficient use of power is made by the aerosol generation device, as one the activation input is removed the provision of electrical power to the energy provision assembly may be terminated.

In one example, the controller is configured to control the energy provision assembly in the second mode to: determine an amount of energy required to heat the consumable article to a target temperature based on a temperature of the consumable article; and control the energy provision assembly in a second mode to provide the determined amount of energy to the consumable article. Various advantages are realised by determining the amount of energy required to heat the consumable article to the target temperature. Overheating of the consumable article can be avoided, as the consumable article is provided with sufficient energy to heat the consumable article to the target temperature, thus avoiding heating of the consumable article to temperatures above (e.g., significantly above) the target temperature. Furthermore, consistent (in other words, constant or uniform) aerosol generation is provided, as the consumable article can be repeatedly and reliably heated to the target temperature, which may be a constant temperature or a predetermined temperature at which a desired level of aerosol is generated. The same level or amount of aerosol may be generated during each heating operation in an aerosol inhalation session. Moreover, determining the amount of energy improves energy usage by the aerosol generation device. That is, when a heating operation follows a previous heating operation, the temperature of the consumable article may be raised (e.g., above a starting temperature) and as such the amount of energy provided to the consumable article may be lower than that provided during the previous heating operation. This combined effect of improved energy usage and consistent aerosol generation is highly advantageous.

It will be appreciated by the person skilled in the art that this contrasts with the prior art, in which no determination of the amount of energy required to heat the consumable article to a target temperature is performed. As such, the prior art looks to provide a fixed or predetermined amount of energy during each heating operation. The prior art approach thus results in inconsistent generation of aerosol (i.e. , varying amounts and temperatures of aerosol following each heating operation or inhalation action) leading to a negative user experience. Furthermore, the prior art may inefficiently consume energy, and may result in overheating of the consumable article.

In one example, the energy provision assembly comprises an electrode assembly configured to electrically couple with the consumable article to provide electrical power through an aerosol precursor material of the consumable article to heat it.

In this way, efficient heating of the consumable article is achieved. When the electrode assembly is controlled in the first mode and second mode as introduced above, the synergistic effect of highly efficient and effective energy usage is realised. Using an electrode assembly may facilitate heating according to the heater in tobacco (HIT) principle. Furthermore, in conventional use of electrode assembly heating, preventing overheating is a challenge due to the rapid heating effect of electrode heating and the HIT principle. However, by determining the amount of energy as introduced above, overheating and inconsistent aerosol delivery can be prevented whilst still providing rapid heating and rapid vapour delivery using the electrode assembly. Using an electrode assembly to provide energy directly to a conductive consumable article means that heat up times are reduced. As such, it is particularly advantageous to switch between the first mode and second mode in use of an electrode assembly to reduce the likelihood of overheating. In addition, aerosol may be rapidly generated by switching from the first mode to the second mode.

In one example, the electrode assembly comprises one or more electrodes.

Electrodes allow current to be applied directly to the consumable article, thus reducing wasted energy. The electrodes may also reduce the excess heat generated, when compared with a traditional heater, thus reducing the need for insulation.

In one example, the electrode assembly is configured to provide electric power directly through the aerosol precursor material. The advantage of this feature is an improvement in the efficiency of the device, thus reducing the load on a power supply.

In one example, the one or more electrodes may be one or more sheet electrodes. The advantage of sheet electrodes is a reduction of space needed for the electrode assembly.

In one example, the one or more electrodes may be opposing electrodes. By providing opposing electrodes, the consumable article may be sandwiched between the electrodes, thus providing an increased surface area of the consumable article that is subjected to the electric potential. This might also be a simpler construction in general.

In one example, the energy provision assembly comprises an inductor configured to provide a varying magnetic field to the consumable article.

Inductive heating is highly advantageous in providing efficient energy or power transfer to the consumable article. In this example, the consumable article comprises one or more susceptors or susceptors are arranged in thermal contact with the consumable article. Rapid heat up times may be obtained using inductive heating, but as above by switching between first mode and second mode the risk of overheating or inconsistent vapour delivery can be achieved (despite the rapid heating).

In one example, the energy provision assembly comprises a heater assembly, and wherein the controller is configured to operate the heater assembly in at least the first mode.

Advantageously, the heater assembly (e.g., comprising one or more resistive heaters) may be particularly suited to maintaining constant temperatures of the consumable article, for example a first target temperature. In the second mode, the controller may switch the provision of electrical power to an electrode assembly to provide heating via HIT heating.

According to a second aspect, there is provided an apparatus for an aerosol generation device configured to receive a consumable article, the apparatus comprising: a controller configured to: control an energy provision assembly in a first mode to control a temperature of the consumable article; and control the energy provision assembly in a second mode to control electrical power provided by the energy provision assembly to the consumable article, wherein the controller is configured to switch operation of the energy provision assembly between the first mode and the second mode.

Advantageously, the apparatus may be suitable for retrofit to existing aerosol generation devices. In this way, existing aerosol generation devices may be made more efficient (e.g., more effective use of energy or a power supply), safer due to avoiding overheating of the consumable article, and provide more consistent vapour delivery. The apparatus may be a consistent part of an aerosol generation device. The apparatus may be configured to be provided in an aerosol generation device. Further advantages of the apparatus will be appreciated from the above.

Advantages of the electrode assembly will be appreciated from the above. According to a third aspect, there is provided a method of operating an aerosol generation device configured to receive a consumable article, the method comprising the steps of: controlling an energy provision assembly in a first mode to control a temperature of the consumable article; control the energy provision assembly in a second mode to control electrical power provided by the energy provision assembly to the consumable article; and switching operation of the energy provision assembly between the first mode and the second mode.

Advantageously, the method offers improved operation of the aerosol generation device. By the first mode, temperature control is performable, which allows for maintenance of the temperature of the consumable article at a baseline temperature. In examples, the baseline temperature may be close to, but not at or above, a vaporisation temperature. By the second mode, power control is performable, which allows for pulses of power to be provided to the energy provision assembly to raise the temperature of the consumable article intermittently and rapidly to at or above the vaporisation temperature. In this way, rapid aerosol generation is achievable, whilst preventing overheating of the consumable article. Furthermore, by switching operation between the first mode and second mode, overheating is prevented, rapid aerosol generation is facilitated, and energy usage is improved. Consistency of the amount aerosol generation may also be obtained.

Further advantages, objectives and features of the present invention will be described, by way of example only, in the following description with reference to the figures. In the figures, like components in different embodiments can exhibit the same reference symbols.

Brief Description of the Drawings

Examples of the present disclosure will now be described with reference to the accompanying drawings.

Figure 1 shows a schematic of an aerosol generation device according to the present invention;

Figure 2 shows a process flow chart;

Figure 3(a) shows a temperature profile of a consumable article in an aerosol generation device; Figure 3(b) shows a profile of power provided to an energy provision assembly in an aerosol generation device;

Figure 4(a) shows a temperature profile of a consumable article;

Figure 4(b) shows an energy profile of the energy provision assembly;

Figure 5 shows a schematic apparatus; and

Figure 6 shows general methodology principles.

Detailed Description

As used herein, the term “aerosol precursor material”, “vapour precursor material” or “vaporizable material” are used synonymously and may refer to a material and/or composition, which may for example comprise nicotine or tobacco and a vaporising agent. The aerosol precursor material is configured to release an aerosol when heated or otherwise mechanically stimulated (such as by vibrations). Tobacco may take the form of various materials such as shredded tobacco, granulated tobacco, tobacco leaf and/or reconstituted tobacco. Nicotine may be in the form of nicotine salts. Suitable vaporising agents include: a polyol such as sorbitol, glycerol, and glycols like propylene glycol or triethylene glycol; a non-polyol such as monohydric alcohols, acids such as lactic acid, glycerol derivatives, esters such as triacetin, triethylene glycol diacetate, triethyl citrate, glycerin or vegetable glycerin. In some examples, the aerosol precursor material is substantially a liquid that holds or comprises one or more solid particles, such as tobacco. An aerosol generation device is configured to aerosolise an aerosol precursor material without combustion in order to facilitate delivery of an aerosol to a user. Furthermore, and as is common in the technical field, the terms “vapour” and “aerosol”, and related terms such as “vaporize”, “volatilize” and “aerosolise”, may generally be used interchangeably.

As used herein, the term “aerosol generation device” is synonymous with “aerosol generating device” or “device” and may include a device configured to heat an aerosol precursor material and deliver an aerosol to a user typically without combusting the aerosol precursor material. The device may be portable. “Portable” may refer to the device being for use when held by a user. The device may be adapted to generate a variable amount of aerosol, which can be controlled by a user input.

As used herein, the term “aerosol” may include a suspension of vaporizable material as one or more of: solid particles; liquid droplets; gas. Said suspension may be in a gas including air. Aerosol herein may generally refer to/include a vapour. Aerosol may include one or more components of the vaporizable material.

Figure 2 shows a schematic cross-sectional view of an aerosol generation device 100. The aerosol generation device 100 is suitable for receiving a consumable article 102 therein. For example, the aerosol generation device 100 may include a chamber 104 in which the consumable article 102 is received, at least partially.

The invention is not limited to the specific aerosol generation device 100 or consumable article 102 described herein. That is, the description of the aerosol generation device 100 and consumable article 102 is provided for illustrative purposes only. The skilled person will appreciate that alternative constructions of aerosol generation devices and consumable articles will be compatible with the present invention. For example, the consumable article 102 may extend out of the aerosol generation device 100 to be accessible by a user.

The consumable article 102 comprises an aerosol precursor material. The term aerosol precursor material is a label used to mean a medium that generates an aerosol or vapour when heated.

In one example, the consumable article 102 contains a liquid precursor material. In some examples, the aerosolised liquid may pass through a solid substrate within the aerosol generation device 100. In other examples, the consumable article 102 may comprise a solid precursor material. In each of the examples most relevant to the aspects of the invention, the aerosol precursor material is capable of electrical conduction. For example, the aerosol precursor material may contain conducting particles, called susceptors, or a conducting substance, such as charcoal. The aerosol precursor material may be as described in WO2022189452. For example, the aerosol precursor material may comprise electrically conductive material in particulate form. The electrically conductive material may be arranged and configured to heat to a temperature sufficient to generate an aerosol. The aerosol precursor material may comprise a porous carbon-based foam, configured to hold a vapour precursor. The porous carbon-based foam may be electrically conductive.

The aerosol generation device 100 comprises an energy provision assembly 110. The energy provision assembly 110 is configured to provide energy to the consumable article 102. The energy provision assembly 110 may be of any suitable type or construction. In examples described herein, the energy provision assembly 110 may be, or may comprise, an electrode assembly. In other examples the energy provision assembly 110 includes one or more inductors. The invention in its broadest sense is not limited to the specific energy provision assembly 110 described herein.

In this example, the energy provision assembly 110 comprises an electrode assembly 112. The electrode assembly 112 is configured to electrically couple with the consumable article 102 to provide a current through the aerosol precursor material of said consumable article 102 to heat it, in use. In the example shown in Figure 2, the electrode assembly 112 comprises two electrodes 114. In another example, the electrode assembly 112 may comprise more electrodes 114 arranged in any appropriate way.

In one example, the one or more electrodes 114 are integral with an internal wall of the chamber 104. In other examples, the one or more electrodes 114 extend into the chamber 104. The one or more electrodes 114 are configured to be in direct contact with the consumable article 102 to provide a current through the aerosol precursor material, in use. Preferably the consumable article 102 is pressed, sandwiched or held between the one or more electrodes 114. When the consumable article 102 is provided with an electrically isolating wrapper, the electrodes 114 can be configured to penetrate the consumable article 102 and/or to be in contact with the aerosol precursor material through one or several windows arranged in the wrapper.

The one or more electrodes 114 may be one or more sheet electrodes. That is, the one or more electrodes 114 may be thin sheet electrodes. The one or more electrodes 114 may be a cylindrical electrode, or a helical electrode. One of the one or more electrodes 114 may be in the form of a first shape from the above shapes and a second of the one or more electrodes 114 may be in the form of a second shape from the above shapes.

In an exemplary embodiment, the one or more electrodes 114 are two opposing sheet electrodes. The two opposing sheet electrodes are configured and spaced such that the consumable article 102 is sandwiched between the electrodes, in use.

In an alternative example, or indeed as may also be provided as part of the energy provision assembly 110 in addition to the electrode assembly 112, the energy provision assembly 110 comprises a heater configured to provide heat to the aerosol precursor material of the consumable article 102, in use. Alternatively, the energy provision assembly 110 comprises a plurality of heaters. The heater is positioned so as to be in thermal contact with the aerosol precursor material of the consumable article 102 to heat it, in use. The heater may be a coil, a ceramic heater, a flat resistive heater, a mesh heater, a MEMS heater, a thin film heater or the like, configured to heat the aerosol precursor material of the consumable article 102.

In the example of the energy provision assembly 110 comprising a heater (such as a resistive heater), the heater may be arranged such that it is in thermal contact with the received consumable article, in use. In one example, the heater may be substantially in contact with one of the one or more electrodes 114 (that is, in one example the energy provision assembly 110 comprises a heater and one or more electrodes). The heater may be present on a side of the electrode 114 away from the consumable article 102, in use. That is, the aerosol generation device 100 may comprise a pair of electrodes 114 and a heater mounted on one of the electrodes 114. In the example where there are one or more heaters, a heater may be present on each of the one or more electrodes 114.

In an example, the heater and the electrode assembly 112 may be configured to simultaneously heat the aerosol precursor material of the consumable article 102 and/or heat the aerosol precursor material of the consumable article 102 at different times. In some examples, the electrode assembly 112 may be, or may comprise, the heater. That is, the electrode assembly may be used as a resistive heating element. In one example, the energy provision assembly 110 comprises one or more inductors that are configured to electrically couple with one or more susceptors arranged within, or in thermal contact with, the consumable article 102.

The aerosol generation device 100 may comprise a mouthpiece 116 through which a user may draw on the aerosol generation device 100 to inhale generated aerosol. The mouthpiece 116 includes a vent or channel 118 that may be connected to a region close to the consumable article 102 for passage of any generated aerosol from the consumable article 102, during use. The generated aerosol may pass from the aerosol precursor material of the consumable article 102, through the channel 118 along the path 119. For example, the channel 118 may extend between an opening in the mouthpiece 116 and the chamber 104 in which the consumable article 102 is at least partially receivable. The mouthpiece 116 is arranged such it may be received in a user’s mouth in use. In other examples, a mouthpiece 116 is not required and a portion of the consumable article 102 may protrude from the aerosol generation device 100. In this example, the protruding portion of the consumable article 102 may work as the mouthpiece. In some other examples, the protruding portion of the consumable article 102 may be received in the channel 118 of the mouthpiece 116.

The aerosol generation device 100 may comprise a controller 108 (or control unit or control circuitry) for electronic management of the device. The controller 108 may include a PCB or the like (not shown).

Functionality and operation of the controller 108 will be described in greater detail below.

In overview, the controller 108 is configured to control the energy provision assembly 110.

The controller 108 is configured to control the energy provision assembly 110 in a first mode to control a temperature of the consumable article 102. For example, within the scope of the invention this may be achieved by use of a temperature PID feedback loop or algorithm. In this way, the amount of electrical power provided by the energy provision assembly 110 is controllable to control a temperature of the consumable article 102.

The controller 108 is configured to control the energy provision assembly 110 in a second mode to control electrical power provided by the energy provision assembly 110 to the consumable article 102. For example, within the scope of the invention this may be achieved by use of a power PID feedback loop or algorithm. In this way, the amount of power provided by the energy provision assembly 110 is controllable. A pulse of electrical power (e.g., at a predetermined or setpoint power level) may be provided by the energy provision assembly 110. In contrast to the first mode, in the second mode the temperature of the consumable article 102 is not (or need not) be considered. Instead, only power feedback is used in the second mode of control. The controller 108 is configured to switch operation of the energy provision assembly 110 between the first mode and the second mode.

In examples, control of heating of the consumable article 102 may be provided by controlling the amount of electrical power provided by the electrode assembly 112 (specifically, to the electrodes 114), or current to the electrode assembly 112, or the potential difference between the electrodes 114. For example, each of the two electrodes 114 may be arranged to provide (e.g. different) electrode potentials, in order to control the heating of the consumable article 102. One electrode potential could be zero, or ground. The controller 108 is configured to receive data from one or more sensors/inputs and control the operation of the aerosol generation device 100 based on the received data. In some examples, the controller 108 may be adapted to measure resistance between the electrodes 114 and based on this value, control the potentials of these electrodes 114.

Where a heater is provided, the heater may be controlled by the controller 108. Where both a heater and the electrode assembly 112 are provided, they may both be controlled by the same controller 108. Alternatively, the heater and the electrode assembly 112 may each be controlled by a separate controller in the aerosol generation device 100.

The aerosol generation device 100 may comprise an activation input sensor 120. The activation input sensor 120 may be a button, a touchpad, or the like for sensing a user’s input, such as a tap or swipe. In other examples, the activation input sensor 120 comprises an article sensor configured to detect if a consumable article 102 has been inserted into the aerosol generation device 100. For example, the input sensor 120 may comprise an authenticity detector that is configured to detect if an authentic article 102 has been inserted into the aerosol generation device 100. Additionally, or alternatively, the user input may also comprise an inhalation action by a user.

The aerosol generation device 100 may comprise a puff sensor 122 (otherwise known as an inhalation sensor). The puff sensor 122 is configured to detect an inhalation action (or puff) by a user on the aerosol generation device 100. In one example, the puff sensor 122 comprises a microphone or a flow sensor configured to detect an airflow within the chamber 104 and/or the airflow channel 118 extending from the chamber 104 through the mouthpiece 116 to an inhalation outlet thereof, the airflow being associated with a user’s inhalation action. In other examples, the puff sensor 122 is configured to detect a change in pressure indicative of a beginning of an inhalation action on the aerosol generation device by the user. In this case, the puff sensor 122 may be located anywhere on the aerosol device 100 in which there would be a change in pressure due to an inhalation action of the user. In one example, the puff sensor 122 is located in the channel 118 between the chamber 104 and the mouthpiece 116 of the aerosol generation device 100. The puff sensor 122 may also detect the end of an inhalation action by the user. For example, the puff sensor 122 may be configured to detect a further change in pressure due to the end of an inhalation action of a user. In one example, the switching to the second mode described in more detail below may occur in response to a user input such as an input into the activation input sensor 120 or an inhalation action detected by the puff sensor 122. Similarly, in one example, the switching to the first mode described in more detail below may occur in response to removal of a user input, or alternatively the provision of a further user input, such as the removal of or a further input into the activation input sensor 120 or the termination of an inhalation action detected by the puff sensor 122.

The aerosol generation device 100 may include one or more temperature sensors 124. The one or more temperature sensors 124 may be configured to sense a temperature of the consumable article 102 and provide a sensing temperature output. The sensing temperature output may be the temperature of the consumable article 102 and/or of the aerosol precursor material of the consumable article 102. The sensing temperature output may be indicative of the temperature of the consumable article 102 and/or of the aerosol precursor material of the consumable article 102. The one or more temperature sensors 124 may be configured to directly or indirectly measure the temperature of the consumable article 102 in the aerosol generation device 100. The one or more temperature sensors 124 may comprise a temperature sensor, such as a thermocouple or thermistor, configured to be located within or adjacent to the consumable article 102 when it is received in the aerosol generation device 100. For example, the one or more temperature sensors 124 may be located within the chamber 104 of the aerosol generation device 100. In other examples, the temperature of the consumable article 102 may be indirectly measured by the use of thermal imaging sensors. In other examples, the temperature sensors 124 may measure the temperature of the electrode assembly 112 and/or the heater, and may be in contact with the electrode assembly 112 and/or the heater. In some other examples, the temperature of the consumable article 102 can be deducted from a resistance value between the electrodes 114 as resistance of the consumable article increases as it is used. For this purpose, the controller 108 may store empirical data associating a temperature value of each measured resistance value.

The aerosol generation device 100 may include a power supply (not shown) such as a battery. The power supply may provide the aerosol generation device 100 with electrical energy providing a voltage in the range of 3 V and 4.2 V. In a preferred embodiment the voltage source is a lithium-ion secondary battery delivering a value of 3.7 V. Such a voltage source is particularly advantageous for a modern aerosol generation device in view of rechargeability, high energy density and large capacity.

The aerosol generation device 100 may further comprise a body 126. The body 126 may be configured to connect to the consumable article 102. Alternatively, the body 126 may be configured to receive or engage with the consumable article 102. The energy provision assembly 110 may be connected to the body 126.

The aerosol generation device 100 may further comprise a power sensor 128. The power sensor 128 may be configured to sense power supplied by the energy provision assembly 110 and provide a sensing power output. The power sensor 128 may be configured to provide an output of electrical power provided by the energy provision assembly 110 to the consumable article 102.

An example of operation of the aerosol generation device 100 will be described in greater detail with reference to Figure 2 which shows an example of a process flow chart of operation of the aerosol generation device 100 according to the present invention. It will be appreciated that the functionality described in relation to Figure 2 may be provided by components of the aerosol generation device 100 being configured (e.g., programmed) to function or operate in the manner described in relation to Figure 3. In particular, the controller 108 may be configured or programmed to function in the manner described.

The process flow chart illustrates the full operation of the aerosol generation device 100. However, it will be appreciated that only a part of the process flow chart will be employed or carried out depending on which of the first mode or second mode the energy provision assembly 110 is controlled in. At S132, electrical power is generated, for example a pulse of electrical power or current is generated. The pulse of electrical power may be generated by a pulse generator.

In the first mode, a temperature measurement is taken at S134. The temperature measurement may be performed or provided by a temperature sensor 124. The temperature sensor 124 provides a sensing temperature output. In an advantageous example, the temperature of the consumable article 102 is determined by measuring the resistance of the consumable article 102. In this way, rather than using a conventional temperature sensor (which has an associated lag between the sensed temperature and the actual temperature of the consumable article) the resistance can be used to determine the temperature which does not have the same associated lag and instead has a quicker response time. The current temperature of the consumable article 102 can thereby be determined with greater accuracy. The resistance of the consumable article 102 can be determined by monitoring or measuring the electrode assembly 112. The resistance of the consumable article 102 increases as it is used. That is to say that the resistance of a used consumable article 102 is higher compared with an unused consumable article 102.

In the first mode, the temperature measurement is used in a PI D algorithm (or PID feedback loop, which may be referred to as a first mode PID algorithm) at S136 to control the temperature of the consumable article 102. In particular, the temperature measurement may be compared with a first target temperature (which may be known as a “temperature setpoint”) provided at S138. The PID algorithm may use the temperature measurement information and the first target temperature information to adjust the amount (or level) of electrical power to be provided by the energy provision assembly 110 to control the temperature of the consumable article 102.

The electrical power or current may be modulated at S140. The modulated power or current may be passed to a controller 108, such as a thermoelectric controller which may be a Peltier controller 136. The Peltier controller 136 controls the amount of electrical power provided to the electrode assembly 112 (specifically, to the electrodes 114), or current to the electrode assembly 112, or the potential difference between the electrodes 114. Even though they are shown separately in Figure 2, the Peltier controller 136 may be part of the controller 108 and so a separate Peltier controller 136 may not be required. In this way, the controller 108 controls the energy provision assembly 110 in the first mode to control the temperature of the consumable article 102.

In the second mode, a power measurement is taken at S142. The power measurement may be performed or provided by a power sensor 128. The power sensor 128 provides a sensing power output. The power measurement may be a measure of power provided by the energy provision assembly 110 to the consumable article 102 (e.g., at the current time).

In the second mode, the power measurement is used in a PID algorithm (or PID feedback loop, which may be referred to as a second mode PID algorithm) at S144 to control the power provided by the energy provision assembly 110 to the consumable article 102. In particular, the power measurement may be compared with a target power (or “power setpoint”) provided by the controller 108, and may be provided at S132 by the pulse generator. The PID algorithm may use the power measurement information and the target power information to control the amount (or level) of electrical power provided by the energy provision assembly 110 to the consumable article 102. It will thus be appreciated that the second mode does not involve the monitoring of temperature of the consumable article, or use of temperature measurement in the second mode PID algorithm. Instead, the second mode is focused on control of the amount or level of power provided by the energy provision assembly 110.

The electrical power or current may be modulated at S140. The modulated power or current may be passed to a controller 108, such as a thermoelectric controller which may be a Peltier controller 136. The Peltier controller 136 controls the amount of electrical power provided to the electrode assembly 112 (specifically, to the electrodes 114), or current to the electrode assembly 112, or the potential difference between the electrodes 114.

In this way, the controller 108 controls the energy provision assembly 110 in the second mode to control electrical power provided by the energy provision assembly 110 to the consumable article 102.

In general, control using PID algorithms is advantageous as the resistance of the consumable article 102 may vary depending on temperature. Providing a constant current may result in the provision of varying power levels in effect being provided to the consumable article 102. Employing a PID algorithm overcomes this problem, and constant power levels can be provided.

Operation of the aerosol generation device 100 according to the present invention will be described with reference to the features shown in Figures 1 and 2, and also with reference to Figures 3(a) and 3(b) which show temperature and power profiles of the aerosol generation device 100. Figure 3(a) shows temperature (y axis) vs time (x axis). Figure 3(b) shows power (y axis) vs time (x axis).

As introduced above, the controller 108 is configured to control the energy provision assembly 110 in the first mode to control a temperature of the consumable article 102. The controller 108 is configured to control the energy provision assembly 110 in the second mode to control electrical power provided by the energy provision assembly 110 to the consumable article 102. The controller 108 is configured to switch operation of the energy provision assembly 110 between the first mode and second mode.

Periods of first mode operation are shown in Figure 3(a) and 3(b) at ti, t₃ and ts. Periods of second mode operation are shown in Figure 3(a) and 3(b) at and t₄.

In an example, the controller 108 is configured to receive an indication from a temperature sensor 124 of a temperature of the consumable article 102. Additionally, the controller 108 is configured to receive an indication of electrical power provided by the energy provision assembly 110 to the consumable article 102. The controller 108 is configured to control the energy provision assembly 110 in the first mode based on the indication from the temperature sensor 124. Additionally, the controller 108 is configured to control the energy provision assembly 110 in the second mode based on the indication from the power sensor 128.

That is, in this example, during periods ti, t₃ and ts, temperature control is performed by the controller 108, and during periods and t4 power control is performed by the controller 108. The controller 108 switches operation of the energy provision assembly between the first and second modes in between these time periods.

In an example, the controller 108 is configured to control the energy provision assembly 110 in the first mode to maintain the temperature of the consumable article 102 at a first target temperature. The first target temperature may be referred to as a baseline or threshold temperature. The first target temperature may be a temperature below a vaporisation temperature of the consumable article 102. However, the first target temperature may be relatively close to the vaporisation temperature such that a power pulse (e.g., provided during the second mode) rapidly raises the temperature of the consumable article 102 above the vaporisation temperature. In this way, aerosol may be rapidly generated, improving energy usage and user experience.

The first target temperature is shown in Figure 3(a) as temperature Ti. In an example, the first target temperature may be around 80°C. In another example, the first target temperature may be around 100°C. The first target temperature may be 80°C or 100°C. The first target temperature is a temperature below the vaporisation temperature of the consumable article 102, and will be verifiable and appropriately selectable for the particular consumable article 102 as will be well understood by those skilled in the art.

To obtain the first target temperature Ti, the first mode may involve an initial rapid ramp or spike in electrical power provided by the energy provision assembly 110 to the consumable article 102, as shown during the first period tv of the power profile of Figure 3(b). Subsequently, once the first target temperature is obtained, the first mode PID algorithm controls temperature of the consumable article 102 to maintain the first target temperature, as shown by the flat line in Figure 3(a). As shown in Figure 3(b), maintaining the first target temperature requires reduced levels of electrical power following this initial power spike. The first PID algorithm may respond relatively slowly to temperature fluctuations, however this is not a problem in the present context as the first target temperature Ti is below the vaporisation temperature.

The controller 108 switches operation of the energy provision assembly 110 from the first mode to the second mode. This may be in response to, or based on, an activation input (as described in greater detail above). That is, switching from the first mode to the second mode may be triggered or initiated by an activation input. The activation input may be sensed by the activation input sensor 120. Highly advantageously, the activation input comprises an inhalation action. In this way, the aerosol generation device 100 responds automatically to an inhalation action of the user (for example, as detected by the puff sensor 122) and does not require a button press, or the like, which may negatively impact the user experience. The controller 108 may be configured to provide a pulse of electrical power in response to the activation input. In this way, the pulse is provided at (or close to) the time at which the user intends to use the aerosol generation device 100, thus providing puff on demand operation.

The controller 108 is configured to control the energy provision assembly 110 in the second mode to provide a pulse of electrical power to the energy provision assembly 110. A first pulse of electrical power is shown in period fcof the power profile of Figure 3(b). A pulse of electrical power may involve a rapid (possibly instantaneous) increase in power provided by the energy provision assembly 110 to the consumable article 102. In this way, aerosol may be rapidly generated. As a result, by the consumable article 102 not needing to be held at high temperature and instead being rapidly pulsed to a temperature at which aerosol may be generated, energy usage is improved. Furthermore, by the present switching between first mode and second mode, improved control process is provided.

In an example, the electrical power provided in the second mode causes heating to a second target temperature T2. For avoidance of doubt, the second target temperature T2 is greater than the first target temperature T1. The second target temperature 2 is at or above the vaporisation temperature of the consumable article 102. In this way, by raising the temperature to the second target temperature T2, aerosol is generated for delivery to the user on demand.

In one example, where the first target temperature T1 is 80°C, the second target temperature may be 100°C. In another example, where the first target temperature T1 is 100°C, the second target temperature may be 125°C or higher, for example 250°C. In this way, rapid and high level of aerosol may be generated, thereby improving the user experience.

In the second mode, the controller 108 is configured to control the energy provision assembly 110 to provide electrical power at a predetermined power level for a period of time. The period of time may be known as a first period, which may be a constant time period or may be a time period based on or dependent on the length of time of a user inhalation action). For example, the predetermined power level may be a power of 20W or 55W. These power levels have been found to result in the heating of the consumable article 102 to effectively generate aerosol. Further advantages of operating the energy provision assembly 110 in the second mode (e.g., to generate the required aerosol) include reduced CO production and high nicotine release, in addition to the above-described energy efficiency.

The controller 108 is configured to switch operation of the energy provision assembly 110 from the second mode to the first mode in response to removal of an activation input. That is, switching may occur in response to, or based on, removal of an activation input (as described in greater detail above). That is, switching from the second mode to the first mode may be triggered or initiated by removal of an activation input. The removal of the activation input may be sensed by the activation input sensor 120. Highly advantageously, the removal of the activation input comprises termination or reduction in intensity or level of an inhalation action. In this way, the aerosol generation device 100 responds automatically to the termination or reduction in intensity or level of the inhalation action of the user (for example, as detected by the puff sensor 122) and does not require a button press, or the like, which may negatively impact the user experience.

When the switch from the second mode to the first mode occurs, temperature control is again performed by the first mode PID algorithm. In this instance, the temperature of the consumable article will be at or close to the second target temperature T2 which is above the first target temperature T1. As a result, when the switch occurs, the controller 108 may control the energy provision assembly 110 not to provide electrical power to the consumable article 102. This can be seen in Figure 3(b) as time subperiods at the beginning of the first mode periods t3 and t₅ where no power (or electrical current) is provided by the energy provision assembly 110. Power is only provided once the temperature of the consumable article falls below the first target temperature T1, at which point the controller 108 controls the energy provision assembly 110 in the first mode to control the temperature of the consumable article 102 (e.g., attempts to maintain the first target temperature T1 by the first mode PID algorithm). This can be seen in the Figure 3(b) as time subperiods following the subperiod of zero power provision, where the power again becomes non-zero and is provided by the energy provision assembly to cause heating of the consumable article 102.

Whilst in one example the switch from the second mode to the first mode occurs due to removal of the activation input, in other examples the switch from the second mode to the first mode may be after a period of time (e.g., a predetermined period of time). As shown in Figures 3(a) and 3(b), the controller 108 is configured to control repeated switching between the first mode and second mode. As described above, the controller 108 is configured to control the energy provision assembly 110 in the first mode during the first time period ti and then switch to control the energy provision assembly in the second mode during the second time period fc. Removal of the activation input results in the switch back to the first mode during the third time period f₃. A further activation input results in a further switch to the second mode during fourth time period t4 and removal of the activation input results in the switch back to the first mode during fifth time period ts. Further switching between modes, or heating operation in general, may be performed until the consumable article 102 has been depleted (e.g., is no longer suitable for generating aerosol by further heating operations).

An exemplary aerosol inhalation session may comprise ten three-second pulses in a five-minute session. That is, the controller 108 may be configured to control the energy provision assembly 110 in the second mode a total of ten times, for a period of three seconds per pulse. By switching between the modes, overall power consumption is reduced.

In an example, the controller 108 is configured to control the energy provision assembly 110 in the second mode to determine an amount of energy required to heat the consumable article 102 to a second target temperature based on a temperature of the consumable article 102; and control the energy provision assembly 110 in the second mode to provide the determined amount of energy to the consumable article 102.

The amount of energy E is determined (e.g., is calculated) by the following equation:

E = (T_T - 7}) x c

( 1 ) where T_T (°C) is the second target temperature, Tt (°C) is the temperature at time i (indicated by the sensing temperature output of the temperature sensor 124), and c (J/°C) is an energy constant. The energy constant c may be predetermined, for example by testing of the consumable article 102. Energy constants may be stored in the controller 108 and appropriately employed for the particular consumable article 102. That is, in an example, the controller 108 is configured to determine the amount of energy required to heat the consumable article 102 to the second target temperature T_T based on a difference between a temperature of the consumable article 102 indicated by the sensing temperature output of the temperature sensor 124 (which here is the temperature at time i and otherwise referred to as the initial temperature or current temperature) and the second target temperature T_T. That is to say that in the second mode, the controller 108 may be configured to determine the amount of energy required to heat the consumable article 102 to a target temperature based on a temperature of the consumable article 102. The controller 108 then controls the energy provision assembly 110 in the second mode to provide the determined amount of energy to the consumable article 102.

In Figure 4(a), a plurality of second mode heating operations t2, t4 are shown. In Figure 4(a), temperature T_T corresponds with temperature T₂ in Figure 3(a). By the present invention, the consumable article 102 is heated during (or by) each heating operation from an initial temperature to the second target temperature T_T. AS shown in Figure 4(a), the second target temperature T_T is constant. In this example, the second target temperature T_T is constant during the aerosol inhalation session, which includes the second target temperature T_T being constant throughout the entire aerosol inhalation session. The second target temperature T_T is a temperature sufficient to produce aerosol generation from the aerosol precursor material. By repeatedly heating the consumable article 102 to the same second target temperature T_T by the second mode, the same (i.e., a consistent) amount of aerosol may be generated by each second mode heating operation leading to a positive user experience.

Following the second mode heating operation, the temperature of the consumable article 102 may fall, but may not reach the first target temperature T_± when a subsequent activation input is provided triggering further second mode heating operation at t₄. By determining the amount of energy required to heat the consumable to the second target temperature T_T (i.e., equivalent to T₂) heating of the consumable above the second target temperature T_T can be prevented or avoided. In this way, efficient energy usage is achieved, as can be seen from Figure 4(b) where the energy provided by the energy provision assembly 110 is lower for the second pulse than for the first pulse, as shown by the lower energy EB for the second pulse when compared with the higher energy EA for the first pulse. Furthermore, there is a reduced risk of overheating, and consistent amounts of aerosol can be generated.

The above-described operation of the aerosol generation device 100 is also highly advantageous where the energy provision assembly 110 has certain configurations.

In an advantageous example, and as introduced above, the energy provision assembly 110 comprises an electrode assembly 112 configured to electrically couple with the consumable article 102 to provide electrical power through an aerosol precursor material of the consumable article 102 to heat the aerosol precursor material. It the art, this may be known as the “heater in tobacco” principle. In a HIT heating process or assembly, conductive particles (e.g., carbon or charcoal) are mixed or interspersed in a substrate (e.g., a tobacco substrate) to make the consumable article 102 conductive. A voltage is then appliable across the consumable article 102 by the electrode assembly 112 and heat is generated in the consumable article 102 due to the resistance of the conductive particles. The heat from the conductive particles is transferred to the substrate to generate aerosol. Such a configuration of energy provision assembly 110 is highly advantageous in the context of the present invention, as rapid heating can be provided. Furthermore, use of an electrode assembly 112 facilitates rapid measurement, or feedback, of the temperature of the consumable article 102. That is, the electrode assembly 112 may itself be used as the temperature sensor 124 to provide the sensing temperature output. Examples of this include measuring the resistance or potential difference across the electrode assembly 112. In this way, overheating of the consumable article 102 can be prevented as rapid temperature feedback is providable using the electrode assembly 112. Highly advantageously, by using an electrode assembly 112, consistent aerosol generation can be ensured when employed in the heating operation process of the present invention, again due to the rapid temperature feedback achievable using the electrode assembly 112.

In an example, the electrode assembly 112 is configured to provide electric power directly through the aerosol precursor material. As mentioned above, this advantageously provides for rapid heating of a consumable article, and improves the efficiency of energy transfer from the energy provision assembly 110 to the consumable article 112. Energy efficiency is thereby improved. In another advantageous configuration of the energy provision assembly 110, the energy provision assembly 110 comprises an inductor (or induction coil) configured to provide a varying magnetic field to the consumable article 102. In this configuration, the varying magnetic field interacts with the aerosol precursor material, or component parts thereof, to cause heating of the consumable article 102. Advantageously, rapid heating can thereby be achieved.

In an example, the energy provision assembly 110 comprises a heater assembly (comprising one or more heaters, as introduced above). The controller 108 is configured to operate the heater assembly in at least the first mode.

This is advantageous as a (potentially lower power) heater assembly can be used for the first mode, or as a preheating or warming mechanism to maintain the consumable article 102 at the first target temperature Ti. In the second mode, the controller 108 may employ the electrode assembly 112 of the energy provision assembly 110 to provide heating. In this way, the HIT principle can be employed in the second mode, which facilitates rapid heating and aerosol generation.

Referring to Figure 5, an apparatus 500 is schematically shown. The apparatus is for an aerosol generation device 100 configured to receive a consumable article. The apparatus 500 comprises a controller 108. The controller 108 is configured to control an energy provision assembly in a first mode to control a temperature of the consumable article; and control the energy provision assembly in a second mode to control electrical power provided by the energy provision assembly to the consumable article, wherein the controller is configured to switch operation of the energy provision assembly between the first mode and the second mode.

Referring to Figure 6, a method is schematically shown. The method is a method of operating an aerosol generation device configured to receive a consumable article. Step S610 comprises controlling an energy provision assembly in a first mode to control a temperature of the consumable article. Step S620 comprises controlling the energy provision assembly in a second mode to control electrical power provided by the energy provision assembly to the consumable article. Step S630 comprises switching operation of the energy provision assembly between the first mode and the second mode. Although preferred embodiments have been shown and described, it will be appreciated by those skilled in the art that various changes and modifications might be made without departing from the scope of the invention, as defined in the appended claims and as described above.

Claims

1. An aerosol generation device configured to receive a consumable article, the aerosol generation device comprising: an energy provision assembly configured to provide energy to the consumable article; and a controller configured to: control the energy provision assembly in a first mode to control a temperature of the consumable article; and control the energy provision assembly in a second mode to control electrical power provided by the energy provision assembly to the consumable article, wherein the controller is configured to switch operation of the energy provision assembly between the first mode and the second mode.

2. The aerosol generation device according to claim 1 , wherein the controller is configured to: receive an indication from a temperature sensor of a temperature of the consumable article; receive an indication from a power sensor of electrical power provided by the energy provision assembly to the consumable article; control the energy provision assembly in the first mode based on the indication from the temperature sensor; and control the energy provision assembly in the second mode based on the indication from the power sensor.

3. The aerosol generation device according to claim 1 or claim 2, wherein the controller is configured to: control the energy provision assembly in the first mode to maintain the temperature of the consumable article at a first target temperature; and control the energy provision assembly in the second mode to provide a pulse of electric power to the energy provision assembly.

4. The aerosol generation device according to claim 3, wherein the first target temperature is around 80°C.

5. The aerosol generation device according to any one of the preceding claims, wherein the controller is configured to control the energy provision assembly in the second mode to provide electrical power at a predetermined power level for a first period.

6. The aerosol generation device according to any one of the preceding claims, wherein the controller is configured to control the energy provision assembly in the second mode to provide electrical power to cause heating to a second target temperature.

7. The aerosol generation device according to any one of the preceding claims, wherein the controller is configured to switch operation of the energy provision assembly from the first mode to the second mode in response to an activation input.

8. The aerosol generation device according to any one of the preceding claims, wherein the controller is configured to switch operation of the energy provision assembly from the second mode to the first mode in response to removal of an activation input.

9. The aerosol generation device according to any one of the preceding claims, wherein the controller is configured to control the energy provision assembly in the second mode to: determine an amount of energy required to heat the consumable article to a target temperature based on a temperature of the consumable article; and control the energy provision assembly in the second mode to provide the determined amount of energy to the consumable article.

10. The aerosol generation device according to any one of the preceding claims, wherein the energy provision assembly comprises an electrode assembly configured to electrically couple with the consumable article to provide electrical power through an aerosol precursor material of the consumable article to heat it.

11. The aerosol generation device according to claim 10, wherein the electrode assembly comprises one or more electrodes.

12. The aerosol generation device according to any one of claims 1 to 9, wherein the energy provision assembly comprises an inductor configured to provide a varying magnetic field to the consumable article.

13. The aerosol generation device according to any one of the preceding claims, wherein the energy provision assembly comprises a heater assembly, and wherein the controller is configured to operate the heater assembly in at least the first mode.

14. An apparatus for an aerosol generation device configured to receive a consumable article, the apparatus comprising: a controller configured to: control an energy provision assembly in a first mode to control a temperature of the consumable article; and control the energy provision assembly in a second mode to control electrical power provided by the energy provision assembly to the consumable article, wherein the controller is configured to switch operation of the energy provision assembly between the first mode and the second mode.

15. A method of operating an aerosol generation device configured to receive a consumable article, the method comprising the steps of: controlling an energy provision assembly in a first mode to control a temperature of the consumable article; controlling the energy provision assembly in a second mode to control electrical power provided by the energy provision assembly to the consumable article; and switching operation of the energy provision assembly between the first mode and the second mode.