WO2024208845A1

WO2024208845A1 - Aerosol generation device

Info

Publication number: WO2024208845A1
Application number: PCT/EP2024/058971
Authority: WO
Inventors: Alec WRIGHT; Jaakko MCEVOY
Original assignee: JT International SA
Current assignee: JT International SA
Priority date: 2023-04-05
Filing date: 2024-04-02
Publication date: 2024-10-10
Anticipated expiration: 2025-10-05
Also published as: KR20250160519A

Abstract

An aerosol generation device (10) is disclosed, comprising: a first wall (19) and a second wall (21) defining a cavity (22) therebetween for receiving an aerosol generating consumable (24); and a heater (40, 60, 70, 90) comprising a substrate (18, 42, 62, 80, 96) with a heater track (28, 44, 64, 74, 92) disposed thereon, the substrate defining at least a portion of the first wall, wherein the first wall comprises at least one aperture (52, 66, 78, 102) for airflow into the cavity.

Description

AEROSOL GENERATION DEVICE

FIELD OF THE INVENTION

The present invention relates to an aerosol generation device and an aerosol generating consumable, in particular airflow arrangements and distribution into a device.

BACKGROUND

Aerosol generation devices typically have air inlet holes to draw in air from outside the device, which then flows through the device to carry and deliver generated aerosol through a mouthpiece of the device to a user.

An object of the invention is to improve the control of airflow through a device and to increase the flexibility of aerosol delivery and pressure draws for a user.

SUMMARY OF THE INVENTION

According to an aspect of the invention there is provided an aerosol generation device, comprising: a first wall and a second wall defining a cavity therebetween for receiving an aerosol generating consumable; and a heater comprising a substrate with a heater track disposed thereon, the substrate defining at least a portion of the first wall, wherein the first wall comprises at least one aperture for airflow into the cavity.

In this way, a more direct air inlet and even distribution of air may be provided for the aerosol generation device. The cavity may comprise a substantially cuboidal shape. Preferably, the second wall is arranged opposite to the first wall. In airflow arrangements for similar devices in the art, the inlet holes of the device are provided at or near a mouthpiece of the device (i.e. toward an aerosol exit region) such that the airflow is directed into one or more channels along an outer side of the heater (outside of the cavity) and into the cavity (or oven space) toward the rear end of a cavity (the end which receives an inserted consumable). It has been found in known arrangements in the art that the outside air can be heated by residual heat from the heater/oven and undesirably cause condensation in the airflow channels. The heater may be a thin-film heater, a polyimide film heater, or a ceramic heater, or another suitable heater that would be apparent to the skilled person.

By providing an aperture in the wall of the cavity, which may be in the heater substrate, air inlet holes may further be provided along the side of the aerosol generation device. In other words, the aperture allows air to flow from outside the cavity to within the cavity such that aerosol generated from a heated consumable in the cavity can be delivered through the device to a user. In this way, the one or more channels configured to direct outside air into the cavity may be arranged to avoid passing alongside the cavity (thereby avoiding the residual heat from the heater). In addition, providing at least one aperture in the wall of the cavity allows increased flexibility in airflow arrangements in the device so as to improve the distribution of air into the cavity/oven space.

Preferably, the aerosol generation device further comprises: a second heater comprising a second substrate with a second heater track disposed thereon, the second substrate defining at least a portion of the second wall, wherein the second wall comprises at least one further aperture in the second wall. In this way, outside air can be distributed into the cavity from both walls so as to better distribute air into the cavity for aerosol delivery.

Preferably, the at least one aperture, and optionally the at least one further aperture, is configured to pass through the respective substrate or substrates. In this way, the first and/or second heater can be easily manufactured to provide one or more apertures for the cavity. As an example, the one or more apertures may be drilled or punched into the heater substrate after the heater track has been deposited or otherwise formed on the substrate. In another example, the apertures may be drilled before the laying of the heater track. It has also been found that ceramic heaters, i.e. when the substrate comprises a ceramic material, can be large energy consumers and therefore it can be advantageous for the aperture(s) to be provided in the ceramic substrate so as to reduce the mass I amount of ceramic material. Since the ceramic material absorbs heat, the substrate could also pre-heat the outside air just before it is delivered to the cavity in a way that mitigates against any undesirable condensation forming in the air delivery channels (between the air inlet of the device and the aperture(s)).

Preferably, the aerosol generation device comprises an open end and a closed end of the cavity, wherein the respective aperture or apertures is arranged at or proximal to the closed end of the cavity. In this way, outside air is directed to the closed end of the cavity at or toward the inserted end of the consumable such that the air is further directed to flow to the open end of the cavity (e.g. upon user inhalation) and deliver generated aerosol to the user.

Preferably, the first wall and/or second wall comprises a plurality of apertures and wherein a first set of the plurality of apertures is offset from a second set of the plurality of apertures along a longitudinal direction of the cavity. Preferably, the first set is arranged in the first wall and the second set is arranged in the second wall. In this way, the pressure drop in can be controlled by the insertion depth or orientation of the consumable into the cavity. The apertures may at least partially align with surface features in the consumable (such as ridges or grooves) which may in turn impact the airflow into and through the cavity. Alternatively, the consumable may also include a paper wrapper having holes which can also align or not align with the plurality of apertures in the walls to allow a user to control the pressure drop in a device, based on an insertion depth or orientation of the consumable.

Preferably, the heater track, and optionally the second heater track, define a series of track channels, and wherein the respective aperture or apertures is arranged in the respective heater substrate adjacent to at least one track channel. In this way, the aperture(s) are arranged close to the heater track (which is configured to deliver heat to an inserted consumable) and thus be optimally positioned to direct outside air into the cavity to pick up and deliver generated aerosol through the cavity to the user.

Preferably, the aerosol generation device of any of the preceding claims further comprises at least one air inlet arranged on a side wall of the aerosol generation device, wherein the at least one air inlet is configured to direct airflow to the at least one aperture, and optionally the at least one further aperture. In this way, the air inlet is provided away from the mouthpiece end of the device to mitigate against any undesirable heating of the outside air in the airflow channels before it is delivered to the cavity. As will be understood, the aerosol generation device may comprise one or more respective channels between the at least one air inlet and aperture(s).

Preferably, the first and second substrates each comprise a ceramic material and the first and second heater tracks each comprise an electrically resistive material, preferably wherein the electrically resistive material is a metallic material. In this way the ceramic material can pre-heat the outside air just before it is delivered to the cavity away from the air inlet holes. This advantageously avoids any undesirable or excessive heating of the air in the airflow channels between the air inlet and aperture(s), which may cause condensation to form in the airflow channels. Other suitable materials for construction of the heater substrates and the heater tracks will be readily apparent to the skilled person.

According to another aspect of the invention, there is provided an aerosol generating consumable for the aerosol generation device according to the first aspect, the consumable comprising: an aerosol forming substance comprising a first side and a second side opposite the first side, and further comprising: a first plurality of ridges on the first side of the aerosol forming substance; and a wrapper arranged around the first side and the second side of the aerosol forming substance, wherein the wrapper comprises at least one opening arranged along the first side and/or the second side of the aerosol forming substance to expose the aerosol forming substance. In this way, the wrapper can be used to effectively control how the air in the cavity flows in and along the aerosol forming substance. The one or more openings may be arranged at different positions in the wrapper adjacent to the first and/or the second side of the aerosol forming substrate to optimise how aerosol generated from the heated aerosol forming substrate is picked up and delivered to the mouthpiece end of the cavity. The positioning or arrangement of the one or more openings or holes across the length of the wrapper may control the pressure drop or draw resistance of the combined deviceconsumable system. The one or more openings or holes may be aligned with grooves or ridges in the aerosol forming substance.

Preferably, the aerosol forming substance further comprises a second plurality of ridges on the second side of the aerosol forming substance. Preferably, the aerosol forming substance further comprises a first plurality of grooves on the first or the second side of the aerosol forming substance, and optionally a second plurality of grooves on the other side of the aerosol forming substance, preferably wherein the first plurality of grooves is arranged on the second side counter to the first plurality of ridges, and more preferably wherein the second plurality of grooves is arranged on the first side counter to the second plurality of ridges.

In this way, the ridges of the consumable on one side of the aerosol forming substance can be positioned in closer proximity to the heater track of an adjacent heater (e.g. the heater track of the first heater) and optimise the heating efficiency of the device. Generated aerosol can then accumulate along the grooves along the sides of the ridges so as to allow air delivered into the cavity to flow along the grooves and deliver the aerosol to a user. As will be appreciated, the opposite side (second side) of the aerosol forming substance can be matched with the heater track provided on the opposite wall of the cavity (e.g. the heater track of the second heater). The wrapper can ensure freshness of the consumable substance as well as provide a form of protection for the substance, which may be prone to crumbling for example.

Preferably, the at least one opening is positioned along at least one of the first plurality of grooves and/or second plurality of grooves. In this way, the opening in the wrapper ensures that air provided to the consumable is directed to the grooves for optimal aerosol delivery.

Preferably, when the consumable is inserted into the cavity of the aerosol generation device, the at least one aperture, and/or optionally the at least one further aperture of the cavity, aligns with the at least one opening of the wrapper. The way in which air is delivered to the tobacco portion of the consumable (i.e. the aerosol forming substance) may depend upon the final oven construction (i.e. the shapes and sizes of the walls defining the cavity in relation to a consumable) for which there are at least two variations. A first variation is if the first and second walls defining the cavity are larger than the tobacco portion I consumable, such that airflow enters the cavity away from an end of the consumable and turns toward the tobacco portion to flow through the consumable alongside the ridges of the aerosol forming substance. In this variation, the positioning of the apertures in the walls defining the cavity is less critical (since air enters the cavity away from the tobacco portion I consumable).

In a second variation, the heater substrate(s) is a similar size or smaller than the tobacco portion. In this second case, airflow first passes through the apertures in the walls and then through the holes/openings in the wrapper of aerosol forming consumable in order to reach the aerosol forming substance/tobacco portion. The openings would be cut in the wrapper before being wrapped around the tobacco portion and the openings are configured to ensure that at least some of the openings at least partially align with one or more apertures in the device. Airflow through an opening in the wrapper may be impeded or prevented by a ridge of the aerosol forming substance that is adjacent to the opening.

Preferably, the aerosol generating consumable further comprises an indication for insertion of the consumable into the aerosol generation device in a first orientation, optionally wherein the indication comprises a printed logo. In this way, the indication allows a user to understand how the ridges and grooves of the consumable may be oriented when it is inserted into the device, which may impact the resistance to draw (i.e. pressure drop) of a user puff depending on which orientation is selected. Thus, the indication provides a form of pressure draw control of the consumable when used in the device.

In some examples, the apertures in the walls/heater substrates may be aligned with the wrapper holes and/or centre of ridges and grooves in such a way that the airflow of the device-consumable system does not differ based on the orientation of the inserted consumable (i.e. which side of the consumable faces up). As an example, it may not matter to the consumer which way a consumable is inserted into the device as there will always be half the holes blocked by the paper and half in line with the holes in the paper. In other examples, the number or shapes of apertures in the heater substrate or wall can be reduced/designed so that the orientation of the inserted consumable varies how the holes of the wrapper in the consumable line up with the wall apertures, thereby impacting the pressure drop I draw resistance. In this way a user could pick from two different pressure drops according to their own preference.

As explained above, the shape, size, number and arrangement of apertures in the walls defining the cavity and the relative shape and orientation of an inserted consumable can impact the airflow into and through the cavity and consumable. Therefore, as will be appreciated, the number and arrangement of apertures in the walls and the openings in the wrapper of the consumable can be designed to influence the pressure drop and draw resistance of an aerosol generation device. A variety of consumables with different ridge and/or groove patterns can also be designed such that the insertion orientation of the consumable into the device cavity may provide a further degree of control for user preference.

BRIEF DESCRIPTION OF DRAWINGS

Embodiments of the invention are now described, by way of example, with reference to the drawings, in which:

Figures 1Aand 1 B are schematic views of an aerosol generation device according to the present disclosure; Figures 2A and 2B are schematic views of the different heater portions with a mouthpiece portion of the device according to the present disclosure;

Figures 3A and 3B are schematic views of different heaters according to the present disclosure;

Figure 4A is a cross-sectional schematic view of a heater portion and a mouthpiece portion according to the present disclosure;

Figures 4B and 4C are different cross-sectional views of the closed end of the heater portion according to the present disclosure;

Figure 5 is a schematic view of a wrapper of the consumable according to the present disclosure;

Figure 6 is a schematic view of a consumable provided in the heater portion of the device without an upper heater substrate according to the present disclosure; and

Figures 7A and 7B are schematic views of a consumable inserted at different depths in the cavity of the device according to the present disclosure.

DETAILED DESCRIPTION

Figure 1 A shows an outer view of an aerosol generation device 10 and Figure 1 B shows a cross-sectional view of the aerosol generation device 10 according to the present invention. The device 10 includes an outer casing 12 in which a, heater portion 14 is arranged. In this specific example, the heater portion 14 is connected to a mouthpiece portion 16 from which generated aerosol can be inhaled by a user. As will be appreciated, the device 10 shown may be further connected to a battery portion or further functional portions (such as a display and control circuitry) which are not shown in Figures 1A and 1 B. The heater portion 14 is also described herein as an oven. As can be seen in Figure 1 B, the heater portion 14 includes a first heater substrate 18 which defines a portion of a first wall 19 in a cavity 20 of the device 10, and a second heater substrate 20 which defines a portion of a second wall 21 in the cavity 22. The walls 19, 21 of the cavity 22 extend beyond the lengths of the respective heater substrates. The cavity 22 is substantially cuboidal in shape, and configured to receive an aerosol generating consumable 24 having a substantially thin cuboidal shape, such as a SIM card. The cavity 22 is also described as an oven space for the consumable 24. The mouthpiece portion 16 is detachably connected to the heater portion 14 I device 10 via an interface connection 26 to allow easier access to the cavity 22 (for inserting a consumable 24 or for cleaning, for example). Alternatively, a consumable 24 can also be inserted into the cavity 22 through the mouthpiece portion 16.

The first and second heater substrates each include a heater track 28 disposed on a surface of the respective heater substrates. The heater tracks 28 are arranged to receive electrical energy from a battery or power source (not shown) of the device 10 and to generate heat for an aerosol generating consumable 26 received in the cavity 22.

In known devices, air inlet holes are provided in the mouthpiece portion such that outside air (i.e. outside of the device) enters the device toward the mouthpiece end of the device and flows past the heater portion of the device to reach the closed end 30 of the cavity 22. In the present device 10, one or more holes, or apertures, are provided in the walls defining the cavity 22 and allow air inlet holes of the device 10 to be arranged on the side of the device 10 in the outer casing 12 in order for outside air to be delivered to the cavity 22 without needing to flow alongside the heater substrates 18, 20 or heater portion 14. Different aperture arrangements are described with reference to the following figures.

Figures 2A and 2B show heater and mouthpiece portions having different heater substrates. As explained above in reference to Figures 1A and 1 B, the heater substrate is part of the heater portion wall which defines the cavity 22 in the device 10.

In Figure 2A, the heater 40 comprises a heater substrate 42 and a heater track 44 disposed on the heater substrate 42. The heater substrate 42 is made of a ceramic material and the heater track 44 is made of a metallic material. The heater 40 further includes two electrical contact points 46 which electrically connect the heater track 44 to a power source in the device. The heater track 44 is shaped as a closed loop connecting the two contact points 46, and the heater track 44 layout is designed such that the metallic track is distributed across the surface of the heater substrate 42. In this example, the heater track 44 has a wave-like or snakelike pattern such that a plurality of straight lengths 48 of the heater track 44 is arranged across the width of the heater substrate 42. The straight lengths 48 of heater track 44 define a series of track channels 50 between the lengths 48.

The straight lengths 48 may be designed to be at least substantially in line with corresponding ridge features on the surface of an inserted consumable to optimise heating efficiency (see Figure 4B). The track channels 50 may be positioned over the flat portions of a tobacco portion (i.e. in between the ridges) in the consumable. It should be understood that different heater track designs and surface features of consumables / tobacco portions can be readily applied to the present disclosure. Different heater track designs are shown in Figures 3A and 3B.

The heater substrate 42 further comprises a plurality of apertures 52 provided in the track channels 50 between the straight lengths 48 of the heater track 44. The apertures 52 are provided towards the closed end 54 of the cavity 22. This ensures that outside air is delivered toward the closed end 54 of the cavity 22 so that the air can flow toward the open end of the cavity 22 across an inserted consumable and deliver generated aerosol to the user. The apertures 52 may be formed in the heater substrate 42 by drilling or punching.

Figure 2B shows another heater 60 which has a heater substrate 62 and a similar heater track 64 to that described with reference to Figure 2A. However, in Figure 2B, the heater substrate 62 does not have holes that are drilled or punched into the substrate, rather notches 66 are provided in the heater substrate 62 at an end of the substrate 62 toward the closed end 68 of the cavity 22. The notches 66 provide the air inlet function as the apertures 52, but can be more formed in a different and simpler way (by cutting for example). It should be appreciated that the notches 66 are not necessarily positioned between the lengths of heater track 64 which may also improve the ease of manufacture of the heater 60. When the heater 60 is arranged in the heater portion 14 of the device 10, the substrate 62 forms a portion of the wall defining the cavity 22, and the notches 66 in the substrate 62 form the holes I apertures in the wall.

It should therefore be understood that apertures can be provided in the walls defining the cavity 22 of the device 10 in different ways, such as by directly drilling holes 52 into a heater substrate 42 or providing notches 66 at an end of the heater substrate 62 that form apertures when placed in the heater portion 14 of the device 10.

Figures 3A and 3B show two different heaters 70, 90 with different heater track layouts to facilitate different air inlets for the oven. Figure 3A shows a heater 70 having apertures 78 similar to that described in reference to Figure 2A. In Figure 3A, the spacing between the straight lengths 72 of the heater track 74 is irregular to provide different widths of track channels 76. In this example, the apertures 78 in the heater substrate 80 are provided in the wider track channels and not in the narrower track channels.

Figure 3B shows a heater 90 having notches 102 similar to that described in reference to Figure 2B. In Figure 3B, the wave-like pattern of the heater track 92 is arranged such that a turn 94 in the heater track 92 toward the centre of the heater substrate 96 is wider than a turn 98 toward the ends of the heater substrate 96. This provides wider track channels 100 for notches 102 to be cut into the end of the heater substrate 96. Figures 4A, 4B and 4C show different arrangement of a consumable in the cavity of a heater portion in a device. Figure 4B shows an exploded view of the area indicated by the square 105 in Figure 4A.

Figure 4A shows the heater portion 110 and the mouthpiece portion 112 of a device, where two heaters 114 form part of the walls 116 defining the cavity 118. The heaters 114 are similar to that described in reference to Figure 2B, where notches 120 are formed in the end of the respective heater substrate 122 such that air inlet holes 124 for the cavity 118 are formed when the heaters 114 are placed in the heater portion 110. However, it should be understood that the heaters described in Figures 2A, 3A and 3B can also be applied in this example.

An aerosol forming consumable 130 is inserted in the cavity 118, and the consumable 130 includes a tobacco portion 132. As can be seen more clearly in Figure 4C the tobacco portion 132 comprises a plurality of ridges 134 and a plurality of grooves 136 on each side of the tobacco portion 132 where each ridge has a corresponding groove on the opposite side of the tobacco portion 132. When the tobacco portion 132 is heated by the heat generated by the heaters 114, aerosol is formed which can travel toward the mouthpiece portion 112 along the grooves 136 of the tobacco portion.

In Figures 4A and 4B, the consumable 130 does not reach the closed end 140 of the cavity 118 after it is inserted. In other words, a void 142 is provided between the closed end 140 of the cavity 118 and the end 144 of the consumable 130. In these examples, outside air enters the void 142 in the cavity 118 and is drawn toward the mouthpiece portion 112 when a user inhales. As will be appreciated, the airflow from the inlet holes 124 to the mouthpiece portion 112 travels along the grooves 136 of the consumable tobacco portion and delivered any generated aerosol to the user.

Figure 4C shows another cross-sectional view of the device and heater arrangement of Figure 4A with the base wall 146 removed and in which the consumable 130 is received right up to where the base wall 146 would be (i.e. the closed end 140 of the cavity 118) such that there would effectively be no void between the end of the consumable 130 and the base wall 146 / closed end of the cavity). In this example, when outside air passes through the air inlet holes 124 it directly reaches the consumable 130. As can be seen in Figure 4C, the design and the features of the consumable 130 would thus affect the airflow through the different air inlet holes 124 into the cavity 118. Some inlet holes 124 are blocked by a ridge 134 of the tobacco portion 132, which would prevent or impede the airflow through those particular holes 124, which increases the draw resistance of the device. Other inlet holes 124 are aligned, or partially aligned, with the grooves 136 of the tobacco portion 132 and airflow would not be impeded (or be less impeded). As will therefore be appreciated, the design of consumables and air inlet holes I apertures and how the insertion depth of the consumable in the cavity can provide different draw resistances and pressure drops in the device.

The consumables may further include a wrapper which wraps around the tobacco portion. Figure 5 shows a wrapper 150 with no tobacco portion provided within. The wrapper 150 is made of paper, cardboard or a thin plastic sheet material, and acts like a sleeve for a tobacco portion. The wrapper is exposed at its ends 152 to allow airflow through the consumable to a mouthpiece. The wrapper 150 further comprises holes 154 which are cut into the wrapper 150. Ideally, the position of the holes 154 are determined in consideration of a tobacco portion which the wrapper 150 is intended for. For example, the holes 154 may correspond to and at least partially align with the grooves in the tobacco portion as well as the cavity air inlet holes in a device heater portion. It is also possible that the wrapper holes 154 are not used when the position of the consumable is away from the closed end of the cavity, such that air simply enters the consumable from the exposed end 152.

Figure 6 shows a wrapped consumable 200 in a heater portion 202 of a device excluding the top heater so that the consumable 200 can be more clearly shown in the device oven. The consumable 200 is arranged on a bottom heater 204 which forms part of the wall of the cavity of the device. The consumable 200 comprises a tobacco portion 206 having a plurality of ridges 208 and a plurality of grooves 210. The consumable 200 also comprises a wrapper 212 having a plurality of holes 214, 216. In this example, the holes 214, 216 are provided at different points across the length of the wrapper 212. In other words, some holes 216 are arranged closer to the end 218 of the consumable 200, and other holes 214 are arranged slightly further from the end 218. In either case, all the holes 214, 216 are arranged toward the same end 218 of the consumable 200 so that that air which enters the cavity must travel along the face of the tobacco portion 206 and carry generated aerosol to the mouthpiece. Arranging the holes 214, 216 at different points across the wrapper length may be due to design considerations to affect or control the pressure drop or draw resistance of the combined deviceconsumable system. As can be seen in Figure 6, holes 214 are only partially aligned with the grooves 210 of the tobacco portion, such that air which passes through the holes 214 can be partially impeded by the ridges 208 adjacent to the grooves.

The concept of controlling draw resistance or pressure drop by the arrangement and alignment of oven wall apertures (air inlet holes of the oven) and the surface features of a tobacco portion is further developed in respect of the wrapper holes and the apertures in the heater substrates (or walls defining the cavity), as explained below in reference to Figures 7A and 7B.

Figures 7A and 7B show schematics of the cavity in a heater portion 250 of a device according to the present invention. Heater substrates 252, 254 define a portion of the cavity, and the substrates 252, 254 have apertures 256 toward ends of the substrates 252, 254 closer to the closed end 258 of the cavity. Figure 7A shows an arrangement where holes 302 in the wrapper of an inserted consumable 300 is partially aligned with the substrate apertures 256 and Figure 7B shows another arrangement where the wrapper holes 302 are fully aligned with the substrate apertures 256. It will be readily apparent to the skilled person how to design the heater portion 250 to allow a consumable to be inserted at different depths into the cavity. As will be appreciated, the partial alignment of the wrapper holes 302 and the substrate apertures 256 shown in Figure 7A causes a higher pressure draw for a user. In other words, the resistance to draw or inhale from the device-consumable arrangement of Figure 7A increased due to the partial alignment of the holes 302 and apertures 256. Conversely, the pressure draw or draw resistance is reduced in the device-consumable arrangement of Figure 7B when the wrapper holes 302 are fully aligned with the apertures 256 of the substrates 252, 254.

The skilled person would readily understand that the size, shape and arrangement of holes in a consumable wrapper, and the apertures or notches in a heater substrate, and their positions and alignment relative to each other in a deviceconsumable arrangement and relative to the shape of the tobacco portion inside the wrapper all contribute to the airflow and pressure draw of the device. Advantageously the present disclosure allows greater flexibility and control of airflow in aerosol generation devices.

Claims

1. An aerosol generation device, comprising: a first wall and a second wall defining a cavity therebetween for receiving an aerosol generating consumable; and a heater comprising a substrate with a heater track disposed thereon, the substrate defining at least a portion of the first wall, wherein the first wall comprises at least one aperture for airflow into the cavity.

2. The aerosol generation device of claim 1 further comprising: a second heater comprising a second substrate with a second heater track disposed thereon, the second substrate defining at least a portion of the second wall, wherein the second wall comprises at least one further aperture in the second wall.

3. The aerosol generation device of claims 1 or 2, wherein the at least one aperture, and optionally the at least one further aperture, is configured to pass through the respective substrate or substrates.

4. The aerosol generation device of any of the claims 1 , 2 or 3 comprising an open end and a closed end of the cavity, wherein the respective aperture or apertures is arranged at or proximal to the closed end of the cavity.

5. The aerosol generation device of any of the preceding claims, wherein the first wall and/or second wall comprises a plurality of apertures and wherein a first set of the plurality of apertures is offset from a second set of the plurality of apertures along a longitudinal direction of the cavity.

6. The aerosol generation device of claim 5, wherein the first set is arranged in the first wall and the second set is arranged in the second wall.

7. The aerosol generation device of any of the preceding claims, wherein the heater track, and optionally the second heater track, define a series of track channels, and wherein the respective aperture or apertures is arranged in the respective heater substrate adjacent to at least one track channel.

8. The aerosol generation device of any of the preceding claims further comprising at least one air inlet arranged on a side wall of the aerosol generation device, wherein the at least one air inlet is configured to direct airflow to the at least one aperture, and optionally the at least one further aperture.

9. The aerosol generation device of any of the preceding claims, wherein the first and second substrates each comprise a ceramic material and the first and second heater tracks each comprise an electrically resistive material, preferably wherein the electrically resistive material is a metallic material.

10. An aerosol generating consumable for the aerosol generation device according to any of claims 1 to 9, the consumable comprising: an aerosol forming substance comprising a first side and a second side opposite the first side, and further comprising: a first plurality of ridges on the first side of the aerosol forming substance; and a wrapper arranged around the first side and the second side of the aerosol forming substance, wherein the wrapper comprises at least one opening arranged along the first side and/or the second side of the aerosol forming substance to expose the aerosol forming substance.

11. The aerosol generating consumable of claim 10, wherein the aerosol forming substance further comprises a second plurality of ridges on the second side of the aerosol forming substance.

12. The aerosol generating consumable of claims 10 or 11 , wherein the aerosol forming substance further comprises a first plurality of grooves on the first or the second side of the aerosol forming substance, and optionally a second plurality of grooves on the other side of the aerosol forming substance, preferably wherein the first plurality of grooves is arranged on the second side counter to the first plurality of ridges, and more preferably wherein the second plurality of grooves is arranged on the first side counter to the second plurality of ridges.

13. The aerosol generating consumable of claim 12, wherein the at least one opening is positioned along at least one of the first plurality of grooves and/or second plurality of grooves.

14. The aerosol generating consumable of any of claims 10 to 13, wherein, when the consumable is inserted into the cavity of the aerosol generation device, the at least one aperture, and/or optionally the at least one further aperture of the cavity, aligns with the at least one opening of the wrapper.

15. The aerosol generating consumable of any of claims 10 to 14 further comprising an indication for insertion of the consumable into the aerosol generation device in a first orientation, optionally wherein the indication comprises a printed logo.