Aerosol generation device and method

Abstract

The present disclosure relates to an aerosol generation device comprising an energy unit assembly, the energy unit assembly comprising: an energy unit receiving region for receiving an energy unit therein, the energy unit receiving region being selectively closable; a sensor arrangement configured to provide an output signal indicating a state of closure of the energy unit receiving region; and a controller configured to: receive the output signal indicating the state of closure of the energy unit receiving region from the sensor arrangement; and control operation of the aerosol generation device based on the output signal indicating the state of closure of the energy unit receiving region.

Description

[0001] AL Ref: P46860WO | JTI Ref:6670 1

[0002] AEROSOL GENERATION DEVICE AND METHOD

[0003] The present disclosure relates to an aerosol generation device, and also to a related method.

[0004] Background

[0005] An aerosol generation device is configured to heat an aerosol substrate to generate aerosol for inhalation. Some aerosol generation devices comprise an energy unit to supply electrical power one or more components of the aerosol generation device.

[0006] The energy unit of the aerosol generation device may need to be replaced. The energy unit may need to be replaced due to, for example, poor performance of the energy unit, degradation, deformation or damage of the energy unit, and / or in accordance with regulatory requirements.

[0007] When replacing the energy unit, an operator (e.g., the user or owner of the device) may attempt to use an energy unit which is not compatible for use with the aerosol generation device. In an example, the operator may attempt to power the aerosol generation device using an incompatible energy unit, for example an energy unit which has an incompatible form. For example, the operator may attempt to use an energy unit which is too long or too wide. Despite having an incompatible form, the energy unit may nevertheless be connectable with the device, and also have suitable electrical properties to power the device. However, ultimately, the arrangement is unsafe as the energy unit may protrude from the device or otherwise be incorrectly received.

[0008] Furthermore, in some instances, the energy unit may require replacement due to deformation of the energy unit rendering it unsafe. However, the level of deformation (e.g., swelling) of the energy unit may impede or prevent removal of the energy unit from the aerosol generation device.

[0009] It is the object of the invention to overcome at least some of the above referenced problems.

[0010] Summary AL Ref: P46860WO | JTI Ref:6670 2

[0011] According to the present disclosure there is provided an aerosol generation device and an associated method including the features as set out in the appended claims.

[0012] According to a first aspect of the present invention, there is provided an aerosol generation device comprising an energy unit assembly, the energy unit assembly comprising: an energy unit receiving region for receiving an energy unit therein, the energy unit receiving region being selectively closable; a sensor arrangement configured to provide an output signal indicating a state of closure of the energy unit receiving region; and a controller configured to: receive the output signal indicating the state of closure of the energy unit receiving region from the sensor arrangement; and control operation of the aerosol generation device based on the output signal indicating the state of closure of the energy unit receiving region.

[0013] Compatibility of the energy unit is a key factor in the ability to close the energy unit receiving region. Therefore, by controlling operation of the aerosol generation device based on the state of closure, safety is improved as it can be ensured that the state of closure of the energy unit receiving region is accounted for in enabling or disabling operation.

[0014] Of course, it will be appreciated that there are other ways of ensuring compatibility, but ensuring closure of the energy unit receiving region, or at least merely checking the state of closure, provides a useful starting point for confirming compatibility.

[0015] Ultimately, consideration of the state of closure is a relatively straightforward check, but one that is not performed by the prior art. Thus, prior art devices are susceptible to operators looking to operate the device under power of an incompatible energy unit.

[0016] As will be described in greater detail below, controlling operation of the aerosol generation device may be to enable the provision of power from the energy unit to components of the aerosol generation device. Additionally, or alternatively, controlling operation of the aerosol generation device may be to inform the user in relation to compatibility of the energy unit.

[0017] In one example, the energy unit assembly comprises a closable and / or providable cover portion for selective closure of the energy unit receiving region. AL Ref: P46860WO | JTI Ref:6670 3

[0018] In this way, by the cover portion, the energy unit receiving region may be closed to secure or retain the energy unit therein. The cover portion may cover the energy unit. The cover portion may enclose (e.g., surround, or encapsulate, at least partially) the energy unit. The cover portion may be hinged or may be configured for sliding engagement with the aerosol generation device.

[0019] In one example, the cover portion comprises a magnetic element, and the sensor arrangement comprises a Hall effect sensor arranged to sense the magnetic element when the cover portion closes the energy unit receiving region.

[0020] In this way, closure of the energy unit receiving region by the cover portion being moved into an appropriate location can be sensed, and the output signal from the sensor provided to the controller.

[0021] In one example, the Hall effect sensor is arranged to sense the magnetic element when the cover portion closes the energy unit receiving region and when the cover portion is located in a predetermined location based on a dimension of a compatible energy unit.

[0022] By such a construction, if the magnetic element is sensed by the Hall effect sensor when the cover portion closes the energy unit receiving region, then a compatible energy unit is known to be inserted. Conversely, if the magnetic element is not sensed, then the energy unit is known not to be inserted, and for example may be too long or too short.

[0023] In one example, the sensor arrangement comprises a photosensor configured to provide an output signal indicating presence or absence of ambient light in the energy unit receiving region.

[0024] In this way, closure of the energy unit receiving region can be confirmed. The controller may look to consider the output of the photosensor in combination with one or more other outputs. For example, the photosensor output may be considered in combination with the output of a proximity sensor. In this way, the reason for ambient light presence in the energy unit receiving region may be established. Said reason, or an instruction, may be communicated to the user. AL Ref: P46860WO | JTI Ref:6670 4

[0025] In one example, the sensor arrangement is configured to provide an output signal indicating presence or absence of an energy unit in the energy unit receiving region; and the controller is configured to: receive the output signal indicating presence or absence of an energy unit in the energy unit receiving region from the sensor arrangement; and control operation of the aerosol generation device based on the output signal indicating presence or absence of an energy unit in the energy unit receiving region.

[0026] In this way, improved device control can be facilitated. Furthermore, as the control of operation is based both on presence or absence of the energy unit and also on state of closure of the energy unit receiving region, improved instruction to the user can be facilitated and also improved understanding of the condition of the device (e.g., energy unit inserted and receiving region open; no energy unit inserted and receiving region open; etc.).

[0027] In one example, the sensor arrangement is further configured to provide an output signal indicating one or more physical characteristics of an energy unit in the energy unit receiving region; and the controller is further configured to: receive the output signal indicating the one or more physical characteristics of an energy unit in the energy unit receiving region; control operation of the aerosol generation device based on the output signal indicating the one or more physical characteristics of the energy unit in the energy unit receiving region.

[0028] Advantageously, in this way, safety is improved, as device operation may be prevented unless a compatible and / or safe energy unit is received at the energy unit receiving region. Additionally, safety may also be improved as the user may be alerted in the instance that physical characteristics of the energy unit indicate degradation, deformation or damage of the energy unit. It may thereby be ensured that the user is able to remove the energy unit from the device, for replacement, recharging and / or recycling.

[0029] In one example, the presence or absence of an energy unit in the energy unit receiving region and the one or more physical characteristics of the energy unit in the energy unit receiving region are indicated by the same output signal from the sensor arrangement.

[0030] In this way, construction may be simplified, as fewer sensors are required. AL Ref: P46860WO | JTI Ref:6670 5

[0031] In one example, the one or more physical characteristics includes a level of swelling of the energy unit.

[0032] In this way, it can be ensured that the energy unit is safe to be used in the device. The risk of thermal events can be reduced. Furthermore, it can be ensured that the energy unit will be removable from the device.

[0033] In one example, the sensor arrangement comprises: a proximity sensor arrangement configured to provide an output signal indicating: presence or absence of an energy unit in the energy unit receiving region; and / or the one or more physical characteristics of the energy unit in the energy unit receiving region, wherein the one or more physical characteristics relate to shape and / or size of the energy unit.

[0034] Advantageously, in this way, proximity sensing can be used to confirm that the energy unit is compatible for use in the device.

[0035] In one example, the sensor arrangement comprises: a magnetic sensor arrangement configured to provide an output signal indicating: presence or absence of an energy unit in the energy unit receiving region; and / or the one or more physical characteristics of the energy unit in the energy unit receiving region, wherein the one or more physical characteristics relate to the presence of a magnetic material as part of the energy unit.

[0036] In one example, a compatible energy unit is known to comprise magnetic material. The controller may enable operation of the aerosol generation device if magnetic material is sensed as part of an energy unit inserted into the energy unit receiving region. In this way, compatibility can be ensured, and / or material of the energy unit can be used as a factor in control of the device.

[0037] In contrast, if no magnetic material is sensed as part of the energy unit inserted into the energy unit receiving region, operation of the aerosol generation device may be prevented, and / or the user informed. In this way, safety and user awareness is improved.

[0038] In one example, the controller is configured to: control operation of the aerosol generation device based on: the output signal indicating the state of closure of the AL Ref: P46860WO | JTI Ref:6670 6 energy unit receiving region; and: the output signal of the proximity sensor arrangement; and / or the output signal of the magnetic sensor arrangement.

[0039] In this way, by using or considering a combination of output signals, it is more likely that a compatible energy unit has been inserted and is being used, or will be used, to power the aerosol generation device. In this way, safety is improved.

[0040] In one example, the aerosol generation device further comprises a user interface configured to provide an output to a user related to the state of closure of the energy unit receiving region and / or compatibility of an energy unit received in the energy unit receiving region.

[0041] In this way, user understanding of device control is facilitated. The user interface may include, but is not limited to, a screen, one or more LEDs, one or more audio output devices, one or more haptic feedback elements.

[0042] In one example, when an energy unit is received in the energy unit receiving region, the controller is configured to: compare one or more electrical properties of the received energy unit with one or more target electrical properties corresponding to a compatible energy unit; and control operation of the aerosol generation device based on the comparison.

[0043] Advantageously, in this way, electrical properties may be used as a factor in control of the device. Of course, whilst control in prior art approaches may be based on electrical properties of energy units, prior art approaches do not consider electrical properties in combination with state of closure of an energy unit receiving region, proximity of an energy unit, physical characteristics, magnetic material sensing, or other factors. The present approach thereby improves safety and reliability of the aerosol generation device.

[0044] According to a second aspect of the present invention, there is provided a method of control of an aerosol generation device comprising an energy unit assembly, the energy unit assembly comprising: an energy unit receiving region for receiving an energy unit therein, the energy unit receiving region being selectively closable; a sensor arrangement configured to provide an output signal indicating a state of closure of the energy unit receiving region, the method comprising: receiving the output signal AL Ref: P46860WO | JTI Ref:6670 7 indicating the state of closure of the energy unit receiving region from the sensor arrangement; and controlling operation of the aerosol generation device based on the output signal indicating the state of closure of the energy unit receiving region.

[0045] The method according to the second aspect may incorporate any or all of the features of the aerosol generation device according to the first aspect, as desired or as appropriate.

[0046] Brief Description of the Drawings

[0047] Examples of the present disclosure will now be described with reference to the accompanying drawings, in which:

[0048] Figure 1 shows a cross section of an aerosol generation device;

[0049] Figure 2 shows three examples of cover portion location;

[0050] Figure 3 shows a cross section of an aerosol generation device;

[0051] Figure 4 shows sensing of a physical characteristic of an energy unit;

[0052] Figure 5 shows sensing of a physical characteristic of an energy unit;

[0053] Figure 6 shows sensing of a physical characteristic of an energy unit; and

[0054] Figure 7 shows a flowchart of a method of control of an aerosol generation device.

[0055] Detailed Description

[0056] 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, cellulose-based sheet material, paper, tobacco, rye, or one or more herbs or botanicals in addition to 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 in any one of shredded, crimped or gathered reconstituted tobacco sheet form. Nicotine may be in the form of nicotine salts. Rye may be in the form of various materials such as shredded rye, granulated rye, rye leaf and / or reconstituted rye. 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, AL Ref: P46860WO | JTI Ref:6670 8 triethylene glycol diacetate, triethyl citrate, glycerin or vegetable glycerin. In some examples, the aerosol precursor material may comprise a liquid or a gel, which may comprise nicotine and / or one or more solid particles. For example, the aerosol precursor material comprises tobacco particles suspended in a solution or gel.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] Referring to Figures 1 and 3, an aerosol generation device 100 is shown. The aerosol generation device 100 comprises an energy unit assembly (indicated generally at 110).

[0061] The energy unit assembly 110 comprises an energy unit receiving region 112. The energy unit receiving region 112 is for receiving an energy unit 200 therein. The energy unit receiving region 112 is selectively closeable.

[0062] The energy unit assembly 110 comprises a sensor arrangement 114. The sensor arrangement 114 is configured to provide an output signal indicating a state of closure of the energy unit receiving region 112.

[0063] The energy unit assembly 110 comprises a controller 150. The controller 150 is configured to receive the output signal indicating the state of closure of the energy unit AL Ref: P46860WO | JTI Ref:6670 9 receiving region 112. The controller 150 is configured to receive the output signal from the sensor arrangement 114. The controller 150 is further configured to control operation of the aerosol generation device 100 based on the output signal.

[0064] As introduced above, it is desired to allow an operator to replace the energy unit used in the aerosol generation device. However, there is a risk that an operator may deliberately or inadvertently use an incompatible energy unit. Doing so may have associated risks, for example in exposing certain energy unit regions, or may result in the aerosol generation device 100 not functioning in a desired and / or optimal manner.

[0065] In general, an incompatible energy unit may be an energy unit having an incorrect form, or may have an incorrect form as a result of the energy unit being incompatible.

[0066] By considering state of closure of the energy unit receiving region 112 as a factor in control of operation of the aerosol generation device 100, risk of operation using an incompatible energy unit is reduced. In some examples, where an (i.e., incompatible) energy unit is inserted in the energy unit receiving region 112, but its form is such that closure of the region 112 is prevented, operation of the aerosol generation device 100 may be prevented and the user alerted to the use of an incompatible energy unit.

[0067] In greater detail, the energy unit receiving region 112 is in the form of a compartment. The aerosol generation device 100 may comprise a body 102, and the energy unit receiving region 112 may extend into the body 102 from a surface (e.g., a lower side surface 104, relative to the intended use orientation) of the aerosol generation device 100. Alternatively, whilst not illustrated, the energy unit receiving region 112 may be provided by a holding arrangement, for example an arrangement of clips or a frame structure arranged to hold the energy unit 200. This construction may be preferred where the region 112 is closable by virtue of removal of a panel of the body 102.

[0068] In all examples, the energy unit receiving region 112 is selectively closable. In this way, the region 112 can be opened to gain access to the receiving region 112 for removal and / or replacement of the energy unit. Furthermore, the region 112 can be closed with an energy unit received therein. Closure of the region 112 ideally results in the energy unit 200 being held in place, and in good electrical connection so as to enable provision of electrical power from the energy unit 200 to the device 100. As is the focus of the invention, in some instances where an incompatible energy unit is received, it will not AL Ref: P46860WO | JTI Ref:6670 10 be possible to close the energy unit receiving region. Sensing of this is used in control of operation of the device 100.

[0069] From the above, it will be appreciated that the state of closure of the energy unit receiving region 112 may be “closed” or “open”. It will be appreciated from examples described herein that the state of closure need not, in some instances, be directly sensed or determined, but instead may be (indirectly) inferred due to sensing one or more components, or obtaining one or more sensing results, using the sensor arrangement 114.

[0070] For avoidance of doubt, the energy unit 200 may be any energy unit suitable for use in an aerosol generation device 100. Preferably, the energy unit 200 is a battery or a battery unit (e.g., comprising a plurality of batteries or battery cells).

[0071] As mentioned above, the energy unit receiving region 112 is selectively closeable. In this regard, the energy unit assembly 110 comprises a closable and / or providable cover portion 116 for selective closure of the energy unit receiving region 112. The cover portion 116 may be a lid. The cover portion 116 may be a panel of the body 102 of the aerosol generation device 100.

[0072] The cover portion 116 may be a hinged (or rotatably mounted) cover portion. The hinged cover portion 116 may be openable to access the energy unit receiving region 112, and closeable to close the energy unit receiving region 112.

[0073] The cover portion 116 may be configured for sliding engagement with the body 102 of the aerosol generation device 100. The sliding cover portion 116 may be removable to access the energy unit receiving region 112, and providable (and engageable with the body 102) to close the energy unit receiving region 112.

[0074] As mentioned above, the sensor arrangement 114 is configured to provide an output signal indicating a state of closure of the energy unit receiving region 112.

[0075] Examples of appropriate sensor arrangements, and their operation, will be described herein. AL Ref: P46860WO | JTI Ref:6670 11

[0076] In a first example, as illustrated in Figure 1 , the sensor arrangement 114 comprises a Hall effect sensor 120. The Hall effect sensor 120 is located adjacent the opening of the energy unit receiving region 112. The cover portion 116 comprises a magnetic element 118. 1 n this example, a magnetic element 118 in the form of a piece of magnetic material is provided on the surface of the cover portion 116 which faces inwardly toward the energy unit 200.

[0077] The Hall effect sensor 120 is arranged to sense the magnetic element 118 when the cover portion 116 closes the energy unit receiving region 112.

[0078] In this way, when the cover portion 116 closes the region 112, the Hall effect sensor 120 provides output indicating proximity of the magnetic element 118. This output signal therefore indicates that the energy unit receiving region is in a closed state, due to the proximity of the magnetic element.

[0079] In contrast, if an energy unit 200 which is too long is inserted in the region 112, it will not be possible to close, or fully close, the cover portion. Consequently, the Hall effect sensor 120 will not sense proximity of the magnetic element 118. This output signal therefore indicates that the energy unit receiving region 112 is in an open state.

[0080] In a second example, as illustrated in Figure 2, the sensor arrangement 114 comprises a Hall effect sensor 120. Operation of the Hall effect sensor is largely identical to that as described with reference to Figure 1. However, in the example of Figure 2, the Hall effect sensor 120 is arranged to sense proximity of the magnetic element 118 when the cover portion 116 is located in a predetermined location based on a dimension of a compatible energy unit 200. As described further below, as an alternative in the examples of Figure 2, a strain sensor may be deployed instead of the Hall effect sensor 120. Those skilled in the art will appreciate the working principles, structures and deployment of typical strain sensors which may be appropriate for a hand-held sized device such as the aerosol generation device 100.

[0081] Figures 2(a) - 2(c) illustrate situations in which energy units 200 of differing dimension are received in the energy unit receiving region 112. In each of Figures 2(a) - 2(c), the cover portion 116 is a screw cap. The screw cap 116 comprises a magnetic ring 118 provided thereon. The screw cap 116 is adapted to be threaded into the energy unit receiving region 112 and into contact with the energy unit 200. The threaded region of AL Ref: P46860WO | JTI Ref:6670 12 the screw cap 116 is formed of a compressible material, such as an elastic or rubber material. In this way, if the screw cap 116 is threaded into the region 112 and into abutting contact with the energy unit 200, the screw cap 116 is compressed and the magnetic ring 118 is located in a predetermined location if the energy unit 200 is of a correct dimension (e.g., length).

[0082] Referring to Figure 2(a), an energy unit 200 is shown received in the energy unit receiving region 112. The energy unit 200 is too short (e.g., as a result of being an incompatible energy unit 200, or, as a result of being too short, it is considered an incompatible energy unit 200). The energy unit therefore is received deeper, or further into, the energy unit receiving region 112. The screw cap 116 is threaded into the region 112 thereby to close the region 112 - that is, the energy unit receiving region 112 is in a closed state. However, the screw cap 116 extends farther into the region 112 than expected / desired and thus the Hall effect sensor does not sense proximity of the magnetic ring 118.

[0083] Referring to Figure 2(b), an energy unit 200 is shown received in the energy unit receiving region 112. The energy unit 200 is too long (e.g., as a result of being an incompatible energy unit 200, or, as a result of being too long, it is considered an incompatible energy unit 200). The energy unit 200 may project from the energy unit receiving region, or may be of a length such that the screw cap 116 cannot be engaged fully to close the region 112. As a result, in an example, the screw cap 116 may not be threaded to close the region 112 - that is, the energy unit receiving region 112 is in an open state. In another example, the screw cap 116 may be partially threaded in, but to an insufficient extent (due to abutment with the energy unit 200) such that the energy unit receiving region 112 is still in an open state. In both examples, the screw cap 116 does not extend sufficiently into the region 112 and thus the Hall effect sensor does not sense proximity of the magnetic ring 118.

[0084] Referring to Figure 2(c), an energy unit is shown received in the energy unit receiving region 112. The energy unit 200 is correctly dimensioned, in this example, by having the correct length (e.g., because it is a compatible energy unit, or because it has the correct length it is considered a compatible energy unit). The screw cap 116 is threaded into the region 112 thereby to close the region 112 - that is, the energy unit receiving region 112 is in a closed state. The screw cap 116 is threaded into the region 112 and into abutting contact with the energy unit 200. The screw cap 116 is compressed and AL Ref: P46860WO | JTI Ref:6670 13 the magnetic ring 118 is located in a predetermined location, adjacent to the Hall effect sensor 120. Therefore, the Hall effect sensor 120 senses proximity of the magnetic ring 118.

[0085] In relation to the example of Figure 2, as an alternative to the Hall effect sensor 120, a strain sensor may be employed. The strain sensor may sense strain in the screw cap 116, thereby sensing when the screw cap is located in the predetermined location (i.e., is correctly located).

[0086] These examples comprising the screw cap 116 adapted to be threaded and formed of a compressible material (whether deployed with the Hall effect sensor 120 in combination with the magnetic ring 118, or with a strain sensing arrangement), are particularly advantageous because not only because an output signal indicating a state of closure of the energy unit receiving region 112 is not provided when the energy unit 200 is too large, but such an output signal is also not provided if the energy unit 200 is too small. In other words, for there to be an output signal indicating a state of closure, the energy unit 200 inserted has to be of the correct size (e.g., compatible). Additionally, an output signal indicating a state of closure of the energy unit receiving region 112 is not provided even if the screw cap 116 is threaded into the opening of the energy unit receiving region 112, but there is no energy unit 200 present.

[0087] In a third example, as illustrated in Figure 3, the sensor arrangement 114 comprises a photosensor 130. The photosensor 130 is configured to provide an output signal indicating the presence or absence of ambient light in the energy unit receiving region 112.

[0088] In this way, when the cover portion 116 closes the energy unit receiving region 112 (e.g., to receive a compatible energy unit 200 therein), the photosensor 130 provides an output indicating an absence of ambient light. This output signal therefore indicates that the energy unit receiving region 112 is in a closed state.

[0089] Conversely, if an energy unit 200 which is too long is inserted in the region 112, it will not be possible to close, or fully close, the cover portion 116. Consequently, the photosensor 130 will sense ambient light. The output signal therefore indicates that the energy unit receiving region 112 is in an open state. AL Ref: P46860WO | JTI Ref:6670 14

[0090] In examples, the sensor arrangement 114 is further configured to provide an output signal indicating the presence or absence of an energy unit 200 in the energy unit receiving region 112. In this way, in combination with sensing state of closure of the energy unit receiving region 112, improved checking of energy unit compatibility and control of operation of the aerosol generation device 100 is facilitated.

[0091] The controller 150 is configured to receive the output signal indicating the presence or absence of an energy unit 200 in the energy unit receiving region 112 from the sensor arrangement 114. The controller 150 is configured to control operation of the aerosol generation device 100 based on the output signal.

[0092] Sensing of presence or absence of an energy unit 200 in the energy unit receiving region 112 may be achieved in a variety of different ways, some examples of which will be described herein but are not intended to be limiting.

[0093] For example, in the case of the screw cap 116 adapted to be threaded into the energy unit receiving region 112 and formed of a compressible material, the output signal indicating a state of closure is only provided if a correctly sized energy unit 200 is present and not provided if the energy unit receiving region 112 is empty. Therefore, those examples also provide a way of indicating the presence or absence of a correctly sized energy unit 202 in the energy unit receiving region 112. In other words, in these examples, a presence can be determined only if the energy unit 200 present is correctly sized.

[0094] In examples, the sensor arrangement 114 is further configured to provide an output signal indicating one or more physical characteristics of an energy unit 200 in the energy unit receiving region 112. In this way, in combination with sensing the state of closure of the energy unit receiving region 112, and / or in combination with sensing presence of absence of an energy unit 200 in the energy unit receiving region 112, improved checking of energy unit compatibility and control of operation of the aerosol generation device 100 is facilitated.

[0095] The controller 150 is configured to receive the output signal indicating the one or more physical characteristics of an energy unit 200 in the energy unit receiving region 112. The controller 150 is configured to control operation of the aerosol generation device 100 based on the output signal. AL Ref: P46860WO | JTI Ref:6670 15

[0096] Sensing of physical characteristics of an energy unit 200 in the energy unit receiving region 112 may be achieved in a variety of different ways, some examples of which will be described herein but are not intended to be limiting.

[0097] As mentioned above, in some examples, the sensor arrangement 114 is configured to provide an output signal indicating the presence or absence of an energy unit 200 in the energy unit receiving region 112, and is also configured to provide an output signal indicating one or more physical characteristics of an energy unit 200 in the energy unit receiving region 112. Both presence or absence of an energy unit 200, and physical characteristics thereof, may be indicated by the same output signal from the sensor arrangement 114.

[0098] Referring again to Figure 3, the sensor arrangement 114 may comprise a proximity sensor arrangement 140. The proximity sensor arrangement 140 may comprise one or more proximity sensors. The proximity sensor arrangement 140 senses proximity of an energy unit received in the energy unit receiving region 112.

[0099] The proximity sensor arrangement 140 is configured to provide an output signal indicating presence or absence of an energy unit 200 in the energy unit receiving region 112. Additionally, or alternatively, the proximity sensor arrangement 140 is configured to provide an output signal indicating the one or more physical characteristics of the energy unit 200 in the energy unit receiving region 112. The one or more physical characteristics may relate to shape and / or size of the energy unit 200.

[0100] That is, it will be appreciated that by reference to the output signal of the proximity sensor arrangement 140, it can be determined whether an energy unit 200 is present or absent in the energy unit receiving region 112. Additionally, or alternatively, one or more physical characteristics can be determined, such as shape or size of the energy unit 200, as shape or size will impact proximity to the proximity sensor arrangement 140 when the energy unit 200 is received in the region 112.

[0101] The proximity sensor arrangement 140 sensing presence or absence of the energy unit 200 may be highly advantageous in combination with the operation of photosensor 130 described above. AL Ref: P46860WO | JTI Ref:6670 16

[0102] In a first scenario, the photosensor 130 senses ambient light, and the proximity sensor arrangement 140 senses proximity of an energy unit 200. Operation of the aerosol generation device 100 may be prevented, due to sensing of ambient light (i.e., indicating an open state of the region 112, possibly due to presence of an energy unit which is too long). The operator may be informed, or instructed to insert a compatible energy unit.

[0103] In a second scenario, the photosensor 130 senses ambient light, and the proximity sensor arrangement 140 does not sense proximity of an energy unit 200. Operation of the aerosol generation device 100 may be prevented, due to presence of light (i.e., indicating an open state of the region 112) and absence of an energy unit. It is likely that the energy unit receiving region 112 is in an open state. The operator may be informed, or instructed to insert an energy unit.

[0104] In a third scenario, the photosensor 130 does not sense ambient light (i.e., indicating a closed state of the region 112) and the proximity sensor arrangement 140 senses proximity of an energy unit 200. Operation of the aerosol generation device 100 may be allowed, due to the sensing corresponding with reception of a compatible energy unit in the energy unit receiving region 112.

[0105] In a fourth scenario, the photosensor 130 does not sense ambient light (i.e., indicating a closed state of the region 112) and the proximity sensor arrangement 140 does not sense proximity of an energy unit 200. Operation of the aerosol generation device 100 may be prevented. It is likely that the energy unit receiving region 112 is closed, but no energy unit, or an incompatible energy unit, is received therein. The operator may be informed, or instructed to insert a compatible energy unit.

[0106] The sensor arrangement 114 may comprise a magnetic sensor arrangement 160. The magnetic sensor arrangement 160 may be provided in addition to, or as an alternative to, the proximity sensor arrangement 140. The magnetic sensor arrangement 160 may comprise one or more magnetic sensors. A magnetic sensor is configured to sense magnetic materials.

[0107] In some examples, a compatible energy unit may be a steel can battery, and thus an output signal from the magnetic sensor arrangement 160 indicating presence of a ferromagnetic energy unit 200 indicates compatibility. Alternatively, in other examples, a compatible energy unit may be an aluminium pouch cell, and thus an output signal from AL Ref: P46860WO | JTI Ref:6670 17 the magnetic sensor arrangement 160 indicating absence of a ferro-magnetic energy unit 200 indicates compatibility.

[0108] The magnetic sensor arrangement 160 is configured to provide an output signal indicating presence or absence of an energy unit 200 in the energy unit receiving region 112. Additionally, or alternatively, the magnetic sensor arrangement 160 is configured to provide an output signal indicating the one or more physical characteristics of the energy unit in the energy unit receiving region 112, wherein the one or more physical characteristics relate to the presence of a magnetic material as part of the energy unit 200. The one or more physical characteristics may also relate to shape and / or size of the energy unit, by appropriately interpreting the level of the output signal of the magnetic sensor arrangement 160.

[0109] That is, it will be appreciated that by reference to the output signal of the magnetic sensor arrangement 160, it can be determined whether an energy unit 200 is present or absent in the energy unit receiving region 112. Additionally, or alternatively, one or more physical characteristics can be determined, such as presence of a magnetic material as part of the energy unit 200, and / or shape or size of the energy unit 200.

[0110] The controller 150 may be configured to control operation of the aerosol generation device 100 based on the output signal indicating the state of closure of the energy unit receiving region 112 and the output signal of the proximity sensor arrangement 140.

[0111] The controller 150 may be configured to control operation of the aerosol generation device 100 based on the output signal indicating the state of closure of the energy unit receiving region 112 and the output signal of the magnetic sensor arrangement 160.

[0112] The controller 150 may be configured to control operation of the aerosol generation device 100 based on the output signal indicating the state of closure of the energy unit receiving region 112 and the output signal of the proximity sensor arrangement 140 and the output signal of the magnetic sensor arrangement 160. It will be appreciated that this approach may be highly advantageous in ensuring that the aerosol generation device 100 is powered or controlled by a compatible energy unit 200. AL Ref: P46860WO | JTI Ref:6670 18

[0113] Whilst not shown in the figures, it will be appreciated that the aerosol generation device 100 as shown and described in relation to Figure 3 may further comprise a magnetic element 118 and Hall effect sensor 120 as shown and described in relation to Figure 1.

[0114] As introduced above, energy units may become degraded, deformed and / or damaged during their usage. The energy unit may require replacement due to deformation of the energy unit rendering it unsafe. However, the level of deformation (e.g., swelling) of the energy unit may impede or prevent removal of the energy unit from the aerosol generation device.

[0115] As described above, the sensor arrangement 114 is configured to indicate physical characteristics of the energy unit 200 received in the energy unit receiving region 112. The physical characteristic may be, or be related to, a level of swelling of the energy unit 200. In this way, it is possible to avoid a situation in which the energy unit 200 is swollen and is thereby stuck within the energy unit receiving region 112.

[0116] It will be appreciated that the level of swelling of the energy unit 200 may be indicated by the output signal of the proximity sensor arrangement 140 and / or magnetic sensor arrangement 160. A level of swelling of the energy unit 200 may also be indicated by any other appropriate sensor, for example a Hall effect sensor (where the energy unit comprises a magnetic material), an ultrasonic sensor, a strain sensor, an inductive sensor, an optical sensor (e.g., a camera) and / or a capacitive sensor.

[0117] If a level of swelling of the energy unit 200 above a threshold level is indicated by the output signal, and / or determined by the controller by reference to the output signal, the operator may be informed and / or instructed to replace the energy unit 200. Operation of the aerosol generation device may be prevented until the energy unit 200 is replaced.

[0118] Referring to Figure 4, in an example, a side wall of the energy unit receiving region 112 comprises a recess, across which is provided a deformable membrane 174. A magnetic element 172 is provided on the rear surface of the membrane 174. A Hall effect sensor 170 is located in the recess. As shown in Figure 4(b), swelling of the energy unit 200 causes the energy unit 200 to force the membrane 174 into the recess, thereby moving the magnetic element 172 toward the Hall effect sensor 170. Swelling of the energy unit 200 can thereby be detected. The operator may be informed and / or instructed to AL Ref: P46860WO | JTI Ref:6670 19 replace the energy unit 200. Operation of the aerosol generation device may be prevented until the energy unit 200 is replaced.

[0119] Referring to Figure 5, in an example, a side wall of the energy unit receiving region 112 comprises a recess. A proximity sensor 180 (which may be part of the proximity sensor arrangement 140) is located in the recess. As shown in Figure 4(c), swelling of the energy unit 200 causes the outer surface of the energy unit 200 to move into the recess, reducing separation between the energy unit 200 and the proximity sensor 180. Swelling of the energy unit 200 can thereby be detected. The operator may be informed and / or instructed to replace the energy unit 200. Operation of the aerosol generation device may be prevented until the energy unit 200 is replaced.

[0120] Referring to Figure 6, in an example, it may be useful to consider the thickness of the energy unit 200 as a relevant physical characteristic for ensuring compatibility. For example, it has been realised that the length of the energy unit 200, as well as its electrical connection and properties, may meet requirements, but thickness may be incorrect.

[0121] With this in mind, a similar approach to that described in relation to Figures 5 or 6 may be employed. As shown in Figure 6(a), when an energy unit 200 of correct thickness is received in the region 112, a Hall effect sensor 170 may provide an output signal of expected level due to a magnetic material 172 being forced toward the sensor 170. However, if an energy unit 200 which is too thin is received in the region 112, the magnetic material 172 may not be forced toward the sensor 170, and therefore a different output signal is provided. The magnetic material 172 may be provided on a spring-mounted platform 178.

[0122] Relevant to all examples described herein, the aerosol generation device 100 may comprise a user interface 300. The user interface is illustrated schematically in Figures 1 and 3. The user interface 300 may be configured to provide an output to a user related to the state of closure of the energy unit receiving region 112 and / or compatibility of an energy unit received in the energy unit receiving region 112. AL Ref: P46860WO | JTI Ref:6670 20

[0123] In this way, user understanding of device control is facilitated. The user interface may include, but is not limited to, a screen, one or more LEDs, one or more audio output devices, one or more haptic feedback elements.

[0124] Relevant to all examples described herein, when an energy unit is received in the energy unit receiving region, the controller 150 is configured to: compare one or more electrical properties of the received energy unit with one or more target electrical properties corresponding to a compatible energy unit; and control operation of the aerosol generation device 100 based on the comparison.

[0125] Electrical properties may include voltage, current, and / or any other appropriate electrical properties. In this way, electrical properties can be checked for compatibility, as well as the other factors described herein. This can facilitate improvements in operation of the device, as well as device safety.

[0126] Relevant to all examples described herein, the aerosol generation device 100 may comprise an auxiliary energy unit (not shown). The auxiliary energy unit may be known as a “secondary” energy unit, the “primary” energy unit being energy unit 200 which is to be received in the energy unit receiving region 112. The auxiliary energy unit may be for providing power to the controller until compatibility of the energy unit 200 is confirmed or at least checked based on the output signals described herein.

[0127] Throughout this specification, control of operation of the aerosol generation device 100 based on output signals is described. For avoidance of doubt, such operation may include, but is not limited to, turning on the device, providing electrical power to one or more components, for example heater components, enabling a heat-up operation or phase, or other operation of the device 100. Control of operation may include enabling or allowing the operation, or preventing or inhibiting the operation.

[0128] Referring to Figure 7, a method of control of an aerosol generation device is shown. The aerosol generation device comprises an energy unit assembly. The energy unit assembly comprises an energy unit receiving region 112 for receiving an energy unit therein, the energy unit receiving region being selectively closable; a sensor arrangement 114 configured to provide an output signal indicating a state of closure of the energy unit receiving region. Step S710 comprises receiving the output signal indicating the state of closure of the energy unit receiving region 112 from the sensor AL Ref: P46860WO | JTI Ref:6670 21 arrangement 114. Step S720 comprises controlling operation of the aerosol generation device 100 based on the output signal indicating the state of closure of the energy unit receiving region. 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

AL Ref: P46860WO | JTI Ref:6670 22CLAIMS1. An aerosol generation device (100) comprising an energy unit assembly (110), the energy unit assembly (110) comprising: an energy unit receiving region (112) for receiving an energy unit (200) therein, the energy unit receiving region being selectively closable; a sensor arrangement (114) configured to provide an output signal indicating a state of closure of the energy unit receiving region (112); and a controller (150) configured to: receive the output signal indicating the state of closure of the energy unit receiving region (112) from the sensor arrangement (114); and control operation of the aerosol generation device (100) based on the output signal indicating the state of closure of the energy unit receiving region, wherein: the energy unit assembly comprises a providable cover portion (116) for selective closure of the energy unit receiving region (112); the cover portion (116) is a screw cap adapted to be threaded into the energy unit receiving region (112) and into contact with the energy unit (200), the threaded region of the cover portion (116) being formed of a compressible material; and the sensor arrangement (114) is arranged to sense that the cover portion (116) is located in a predetermined location based on a dimension of a compatible energy unit (200), when the cover portion (116) is threaded into the energy unit receiving region (112) and into contact with the energy unit (200).

2. The aerosol generation device (100) according to claim 1 , wherein the cover portion (116) comprises a magnetic ring (118), and wherein the sensor arrangement (114) comprises a Hall effect sensor (120) arranged to sense that the magnetic ring (118) is located in the predetermined location, when the cover portion (116) is threaded into the energy unit receiving region (112) and into contact with the energy unit (200).AL Ref: P46860WO | JTI Ref:6670 233. The aerosol generation device according to claim 1 , wherein the sensor arrangement (114) comprises a strain sensor arranged to sense strain in the cover portion (116), to thereby sense when the cover portion (116) is located in the predetermined location, when the cover portion (116) is threaded into the energy unit receiving region (112) and into contact with the energy unit (200).

4. The aerosol generation device (100) according to any one of the preceding claims, wherein: the sensor arrangement (114) is configured to provide an output signal indicating presence or absence of an energy unit in the energy unit receiving region (112); and the controller (150) is configured to: receive the output signal indicating presence or absence of an energy unit in the energy unit receiving region (112) from the sensor arrangement (114); and control operation of the aerosol generation device (100) based on the output signal indicating presence or absence of an energy unit in the energy unit receiving region (112).

5. The aerosol generation device (100) according to any one of the preceding claims, wherein: the sensor arrangement (114) is further configured to provide an output signal indicating one or more physical characteristics of an energy unit in the energy unit receiving region (112); and the controller (150) is further configured to: receive the output signal indicating the one or more physical characteristics of an energy unit in the energy unit receiving region (112); control operation of the aerosol generation device (100) based on the output signal indicating the one or more physical characteristics of the energy unit in the energy unit receiving region (112).

6. The aerosol generation device (100) according to claim 5 when dependent on claim 4, wherein the presence or absence of an energy unit in the energy unit receiving region (112) and the one or more physical characteristics of the energyAL Ref: P46860WO | JTI Ref:6670 24 unit in the energy unit receiving region (112) are indicated by the same output signal from the sensor arrangement (114).

7. The aerosol generation device (100) according to claim 5 or 6, wherein the one or more physical characteristics includes a level of swelling of the energy unit.

8. The aerosol generation device according to any one of claims 4 to 7, wherein the sensor arrangement comprises: a proximity sensor arrangement (140) configured to provide an output signal indicating: presence or absence of an energy unit in the energy unit receiving region (112); and / or the one or more physical characteristics of the energy unit in the energy unit receiving region (112), wherein the one or more physical characteristics relate to shape and / or size of the energy unit.

9. The aerosol generation device according to any one of claims 4 to 8, wherein the sensor arrangement comprises: a magnetic sensor arrangement (160) configured to provide an output signal indicating: presence or absence of an energy unit in the energy unit receiving region (112); and / or the one or more physical characteristics of the energy unit in the energy unit receiving region (112), wherein the one or more physical characteristics relate to the presence of a magnetic material as part of the energy unit.

10. The aerosol generation device according to claim 8 or 9, wherein the controller (150) is configured to: control operation of the aerosol generation device (100) based on: the output signal indicating the state of closure of the energy unit receiving region (112); and: the output signal of the proximity sensor arrangement (140); and / or the output signal of the magnetic sensor arrangement (160).AL Ref: P46860WO | JTI Ref:6670 2511 . The aerosol generation device according to any one of the preceding claims, further comprising a user interface (300) configured to provide an output to a user related to the state of closure of the energy unit receiving region (112) and / or compatibility of an energy unit received in the energy unit receiving region (112).

12. The aerosol generation device (100) according to any one of the preceding claims, wherein, when an energy unit is received in the energy unit receiving region, the controller (150) is configured to: compare one or more electrical properties of the received energy unit with one or more target electrical properties corresponding to a compatible energy unit; and control operation of the aerosol generation device (100) based on the comparison.

13. A method of control of an aerosol generation device comprising an energy unit assembly (110), the energy unit assembly (110) comprising: an energy unit receiving region (112) for receiving an energy unit therein, the energy unit receiving region being selectively closable; and a sensor arrangement (114) configured to provide an output signal indicating a state of closure of the energy unit receiving region, wherein: the energy unit assembly comprises a providable cover portion (116) for selective closure of the energy unit receiving region (112); the cover portion (116) is a screw cap adapted to be threaded into the energy unit receiving region (112) and into contact with the energy unit (200), the threaded region of the cover portion (116) being formed of a compressible material; and the sensor arrangement (114) is arranged to sense that the cover portion (116) is located in a predetermined location based on a dimension of a compatible energy unit (200), when the cover portion (116) is threaded into the energy unit receiving region (112) and into contact with the energy unit (200), the method comprising: receiving the output signal indicating the state of closure of the energy unit receiving region (112) from the sensor arrangement (114); andAL Ref: P46860WO | JTI Ref:6670 26 controlling operation of the aerosol generation device (100) based on the output signal indicating the state of closure of the energy unit receiving region.

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