Aerosol generation system

Abstract

An aerosol generating system is disclosed comprising an aerosol generator (10) and aerosol generating consumables (24, 110), wherein the aerosol generator comprises a first wall (19) and a second wall (21) defining a cavity (22) between them for receiving the aerosol generating consumables, and a heater comprising a first substrate (18, 76) on which a first heater track is disposed, and a second substrate (20, 96) on which a second heater track is disposed, wherein the first heater substrate is at least a portion of the first wall A heater is provided, wherein the layout of the first heater track (72) is different from the layout of the second heater track (92), and the aerosol generating consumable comprises an aerosol forming material having a set of one or more protrusions (112) on the first side of the aerosol forming material, where at least a portion of the one or more protrusions is aligned with the first heater track layout when the aerosol generating consumable is inserted into the cavity in a first orientation.

Description

【Technical Field】 【0001】 The present invention relates to an aerosol generation system comprising an aerosol generator and an aerosol generating consumable. In particular, the present invention relates to a heat - not - burn tobacco system. 【Background Art】 【0002】 An aerosol generator typically has an air inlet hole for drawing air from outside the device, and the air then flows into a heater oven or cavity of the device where the consumable is inserted. By heating the consumable, an aerosol is generated, and the aerosol is delivered from the cavity to the user through the mouthpiece of the device. 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0003】 The object of the present invention is to improve the heating efficiency of the consumable in the aerosol generation system. 【Means for Solving the Problems】 【0004】 According to an aspect of the present invention, there is provided an aerosol generation system comprising an aerosol generator and an aerosol generating consumable. The aerosol generator comprises a first wall and a second wall defining a cavity therebetween for receiving the aerosol generating consumable, and a heater comprising a first substrate on which a first heater track is disposed and a second substrate on which a second heater track is disposed, wherein the first heater substrate defines at least a part of the first wall, the second heater substrate defines at least a part of the second wall, and the layout of the first heater track is different from the layout of the second heater track. The aerosol generating consumable comprises an aerosol - forming material having a set of one or more ridges on a first side of the aerosol - forming material, and at least a part of the one or more ridges is aligned with the first heater track layout when the aerosol generating consumable is inserted into the cavity in a first orientation. 【0005】 One or more protrusions are raised from the surface on each side of the aerosol-forming material. Therefore, the protrusions of the aerosol-forming material are raised toward the heater track. This closer proximity between the protrusions and the heater track optimizes heat transfer from the heater track to the aerosol-forming material. Optionally, one or more protrusions may be in direct contact with their respective heater tracks. 【0006】 Known heaters have a track layout, typically with regularly spaced track sections to distribute heat uniformly throughout the heater / cavity. Having a different layout between a first heater track and a second heater track (i.e., an asymmetric or irregular arrangement of the two heater tracks) means that some sections of the heater track may be positioned closer to each other, thereby locally increasing the power density and / or heat flux at these locations. Other track sections may be positioned further apart to provide lower power density / heat flux at these locations. 【0007】 Therefore, the different layouts between the first and second heater tracks mean that the orientation of the consumables within the cavity can be different, resulting in different degrees of alignment between the aerosol-forming material's protrusions and each heater track. As can be understood, this allows the user to select a preferred intensity of aerosol generation, with a better arrangement of the protrusions and each heater track resulting in higher heat transfer during use, thereby causing faster or greater aerosol generation. Conversely, a poorer arrangement of the protrusions and heater tracks results in lower heat transfer and less aerosol generation during use. 【0008】 Preferably, the aerosol-forming material has a second set of one or more ridges on a second side of the aerosol-forming material. In this way, the back side of the aerosol-forming material provides an additional set of ridges that can be aligned with or positioned close to the heater track when the consumable is received in the cavity. As understood, since the first heater track layout and the second heater track layout are different, the degree of alignment of the ridges on either side of the aerosol-forming material depends on the arrangement of the ridges on each side. If the second set of ridges has a different pattern from the pattern of the first set of ridges, the aerosol-forming material may be heated at two different intensities depending on the orientation of the inserted consumable. 【0009】 Preferably, at least a portion of one or more of the second set of raised sections is aligned with the second heater track layout when the aerosol generating consumable is inserted into the cavity in the first orientation. In this way, the first and second sets of raised sections are aligned with the respective heater tracks of the heater so that the raised sections on both sides of the inserted consumable can be optimally heated. In another example, the raised sections of the second set may be substantially misaligned with the second heater track layout (for example, the pattern of the second set of raised sections substantially coincides with the pattern of the first set of raised sections), and an aerosol generating consumable intended to be used in a second reverse orientation following the first orientation (i.e., inverted) may be provided to extend the life of the consumable. 【0010】 Preferably, one or more airflow channels are formed along one or more ridges of a first set and / or a second set of one or more ridges on each first or second side of the aerosol-forming material when the aerosol-generating consumable is inserted into the cavity. In this way, during use, air is configured to flow along one or more ridges between each wall and each side of the aerosol-forming substrate. The airflow channels may be configured to direct airflow along the length of the aerosol-forming material, i.e., from the closed end of the cavity to the open end / mouthpiece end. The ridges and channels may be linear, or they may be wavy / have one or more turns to vary the length of the ridges / channels across the aerosol-forming material. In another example, the ridges and / or grooves may extend along the entire length of each side of the aerosol-forming material. 【0011】 Preferably, the aerosol-generating consumable has one or more grooves on the first and second sides of the aerosol-forming material, opposite to one or more ridges in a first set and one or more ridges in a second set, to provide a corrugated shape. In this way, a heat distribution within the cavity can be easily created. The aerosol-generating consumable may have a corrugated shape of alternating ridges and grooves across both sides of the aerosol-forming material, where grooves on one side coincide with ridges on the other side (and vice versa). The corrugated shape of the aerosol-forming material can be easily fabricated by compressing the aerosol-forming material into shape. 【0012】 Preferably, the aerosol-generating consumable further comprises a packaging material sleeve around the aerosol-forming substance. In this way, airflow channels along one or more ridges can be better defined. The packaging material also provides a form of protection for the aerosol-forming substance. 【0013】 Preferably, the aerosol generating consumable further includes an indicator for inserting the consumable into the aerosol generator in a first orientation, and optionally the indicator includes a printed logo. In this way, the user can easily determine the orientation of the aerosol generating consumable for insertion into the cavity of the aerosol generator. 【0014】 Preferably, the packaging sleeve has one or more holes, and preferably, one or more holes in the packaging sleeve are positioned above one or more airflow channels. In this way, outside air can be easily guided along the aerosol-forming material into the airflow channels. 【0015】 Preferably, the first heater track and / or the second heater track are at least partially embedded in the respective first and / or second substrates such that the respective walls defined by the first and / or second heater substrates are substantially flat. In this way, the aerosol generating consumables can be easily inserted into the cavity of the aerosol generator without damaging or unintentionally compressing the aerosol-forming material of the consumables. 【0016】 Preferably, the first heater track and the second heater track each comprise one or more straight sections arranged along a line substantially parallel to the longitudinal direction of the cavity, and the straight sections of each heater track are offset from each other when viewed along an axis parallel to the surface normals of the first and second walls. Preferably, the straight sections of the first heater track and / or the second heater track are arranged irregularly across the width of each substrate. 【0017】 As described above, known heater track layouts have straight sections that may be regularly spaced apart across the heater substrate. Irregular spacing of heater track sections across the substrate allows different regions of the heater wall / cavity to have varying power densities and heat fluxes. In one example, the first spacing between two first straight sections may be greater than the second spacing between two second straight sections of each heater track. 【0018】 Preferably, the aerosol generating system further comprises at least one aperture on the first substrate and / or the second substrate, preferably the at least one aperture positioned between two straight sections of each substrate. In this way, outside air can be guided into the cavity through the heated substrate. The outside air may also be heated by a heater track before entering the cavity. In one example, at least one aperture may be positioned within a first gap proximal to the closed end of the cavity to ensure that the generated aerosol can be easily delivered to the user along the consumables. 【0019】 Preferably, at least one of the one or more holes in the packaging sleeve is at least partially aligned with at least one aperture when the aerosol generating consumable is inserted into the cavity. 【0020】 Preferably, the first substrate and the second substrate each comprise a ceramic material, and the first heater track and the second heater track each comprise an electrical resistance material, preferably the electrical resistance material being a metallic material. 【0021】 Here, embodiments of the present invention will be described as examples with reference to the drawings. [Brief explanation of the drawing] 【0022】 [Figure 1A-B] This is a schematic diagram of the aerosol generating device according to this disclosure. [Figure 2A-B]Schematic diagram of different heater parts having a mouthpiece portion of the device according to the present disclosure. [Figure 3A-B] Schematic diagram of different heaters according to the present disclosure. [Figure 4A-B] Different perspective views of the heater part according to the present disclosure. [Figure 5] Schematic diagram of the packaging material of the consumable according to the present disclosure. [Figure 6] Schematic diagram of the consumable provided in the heater part of the device without an upper heater base material according to the present disclosure. [Figure 7A-B] Schematic diagram of the consumable inserted into the cavity of the device at different depths according to the present disclosure. [Figure 8A] Schematic cross-sectional view of the heater part and the mouthpiece part according to the present disclosure. [Figure 8B] Another cross-sectional view of the closed end portion of the heater part according to the present disclosure. 【MODE FOR CARRYING OUT THE INVENTION】 【0023】 FIG. 1A shows an external view of the aerosol generating device 10, and FIG. 1B shows a cross-sectional view of the aerosol generating device 10 according to the present invention. The device 10 includes an external casing 12 in which a heater part 14 is disposed. In this particular example, the heater part 14 is connected to a mouthpiece part 16 through which the generated aerosol can be inhaled by the user. As will be understood, the shown device 10 may be further connected to a battery part or additional functional parts (such as a display and a control circuit) not shown in FIGS. 1A and 1B. The heater part 14 is also described herein as an oven. 【0024】 As can be seen in Figure 1B, the heater portion 14 includes a first heater substrate 18 defining a portion of the first wall 19 within the cavity 22 of the device 10, and a second heater substrate 20 defining a portion of the second wall 21 within the cavity 22. The walls 19 and 21 of the cavity 22 extend beyond the length of their respective heater substrates. The cavity 22 is substantially cubic in shape and is configured to receive aerosol-generating consumables 24 having a substantially thin cubic shape, such as a SIM card. The cavity 22 is also referred to as the oven space for the consumables 24. The mouthpiece portion 16 is detachably connected to the heater portion 14 / device 10 via an interface connection 26, allowing easier access to the cavity 22 (for example, to insert or clean the consumables 24). Alternatively, the consumables 24 can also be inserted into the cavity 22 through the mouthpiece portion 16. As shown in Figure 1B, the aerosol generator 10, together with the consumables 24, forms the aerosol generating system of this disclosure. 【0025】 The first heater substrate and the second heater substrate each include a heater track 28 disposed on the surface of the respective heater substrate. The heater track 28 is arranged to receive electrical energy from the battery or power source (not shown) of the device 10 and generate heat for the aerosol generating consumable 26 received in the cavity 22. 【0026】 Figures 2A and 2B show heater and mouthpiece portions with different heater substrates. As described above with reference to Figures 1A and 1B, the heater substrate is part of the heater portion wall that defines the cavity 22 within the apparatus 10. 【0027】 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 contacts 46 that electrically connect the heater track 44 to a power source in the device. The heater track 44 is formed as a closed loop connecting the two contacts 46, and the layout of the heater track 44 is designed so that the metallic track is distributed across the entire surface of the heater substrate 42. In this example, the heater track 44 has a wavy or serpentine pattern such that a plurality of straight length sections 48 of the heater track 44 are arranged in the width direction of the heater substrate 42. The straight length sections 48 of the heater track 44 define a series of track channels 50 between the length sections 48. 【0028】 The straight length section 48 may be designed to substantially align with the corresponding raised feature on the surface of the inserted consumable in order to optimize heating efficiency. The track channel 50 may be positioned on the flat portion of the tobacco portion within the consumable (i.e., between the raised sections). It should be understood that different heater track designs and surface features of the consumable / tobacco portion can be readily applied to this disclosure. Different heater track designs are shown in Figures 3A and 3B. 【0029】 The heater substrate 42 further comprises a plurality of apertures 52 provided in the track channels 50 between the straight length sections 48 of the heater track 44. The apertures 52 are provided toward 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 across the inserted consumable toward the open end of the cavity 22 and deliver the generated aerosol to the user. The apertures 52 may be formed in the heater substrate 42 by perforation or punching. 【0030】 Figure 2B shows another heater 60 having a heater substrate 62 and a heater track 64 similar to that described with reference to Figure 2A. However, in Figure 2B, the heater substrate 62 does not have a hole perforated or punched into the substrate, but rather the heater substrate 62 has a notch 66 at the end of the substrate 62 toward the closed end 68 of the cavity 22. The notch 66 provides an air inlet function as an aperture 52, but can be formed in a different, simpler way (e.g., by cutting). It should be recognized that the notch 66 is not necessarily located between the length sections of the heater track 64, which can also improve the ease of manufacturing the heater 60. When the heater 60 is placed in the heater section 14 of the apparatus 10, the substrate 62 forms part of the wall defining the cavity 22, and the notch 66 in the substrate 62 forms a hole / aperture in the wall. 【0031】 Therefore, it should be understood that apertures can be provided in different ways in the wall defining the cavity 22 of the device 10, such as by directly drilling a hole 52 in the heater substrate 42, or by providing a notch 66 at the end of the heater substrate 62 that forms the aperture when it is placed in the heater portion 14 of the device 10. 【0032】 Figures 3A and 3B show two different heaters 70 and 90 having different heater track layouts. The first heater 70 in Figure 3A may define a portion of the first wall of the cavity in the aerosol generator, and the second heater 70 in Figure 3B may define a portion of the second wall of the cavity. In these particular examples, the heaters 70 and 90 in Figures 3A and 3B include different regions with higher power densities due to the heater track layout and different types of air inlets in their respective substrates. It will be readily apparent to those skilled in the art that different heater layouts may be used according to design requirements, and that air inlets may be located in different regions within the oven cavity. 【0033】 Figure 3A shows a first heater 70 having a heater track 72 layout with straight length sections 74 arranged parallel to the length sections of the heater substrate 76. Track channels 78 are provided between the straight length sections 74. As can be seen from a particular example in Figure 3A, sets of straight length sections 74 80 near the central width of the substrate 76 (shown by dashed boxes) are arranged more closely so that the track channels between the track length sections in this region are narrower, providing a region of higher power density. 【0034】 Furthermore, the first heater 70 includes additional straight length sections 74 that are spaced further apart from the closely spaced straight length sections 74 of the set 80, providing wider track channels 78 outside the set 80. Thus, the spacing of the track straight length sections 74 is irregular to provide track channels 78 of different widths. The heater 70 also includes an aperture 82 in the wider track channel 78, similar to that described with reference to Figure 2A. In this example, the aperture 82 of the heater substrate 76 is provided in the wider track channel rather than the narrower track channel. 【0035】 Figure 3B shows a second heater 90 having heater tracks 92 having straight length sections 94 arranged parallel to the length sections of the heater substrate 96. As described above, track channels 98 are provided between the length sections 94. As can be seen from Figure 3B, the straight length track sections 94 are arranged in pairs 100 (shown in dashed boxes) across the substrate 96, and the pairs of length sections 94 are closely spaced, with the spacing / track channels 98 between separate pairs 100 being greater than the track channels between the length sections 94 within a pair 100. The pairs 100 of straight track sections 94 provide a region of higher power density, while the wider track channels between the pairs are a region of lower power density / no power density across the heater 90. 【0036】 The second heater 90 also has a notch 102 similar to that described with reference to Figure 2B. In Figure 3B, the wavy pattern of the heater track 92 is arranged such that the direction changes 104 of the heater track 92 toward the center of the heater substrate 96 are wider than the direction changes 106 toward the edges of the heater substrate 96. This provides a wider track channel 98 for the notch 102 to be cut into the edges of the heater substrate 96. 【0037】 Figures 4A and 4B show cross-sectional views of the first heater 70 and the second heater 90 of Figures 3A and 3B, arranged in the heater section of the aerosol generator, where the first heater 70 forms the first wall and the second heater 90 forms the second wall of the oven cavity of the heater section. The consumables 100 are arranged in the cavity, which is cut across the heaters 70 and 90 to show how the consumables 110 are aligned with the heater tracks 72 and 92 of the respective heaters 70 and 90. Figures 4A and 4B show the same arrangement of the consumables 110 in the heater section, with Figure 4A showing the first view with the first heater 70 facing upwards and Figure 4B showing the second view with the second heater 90 facing upwards. 【0038】 The consumable 110 has a plurality of ridges 112 and grooves 114 along both sides of the tobacco portion / aerosol-forming material, with each groove 114 corresponding to and facing the ridge on the opposite side of the consumable 110. In other words, the tobacco portion of the consumable 110 has a corrugated shape. However, it should be understood that grooves corresponding to the opposite side of the tobacco portion may not be provided, and the ridges may be formed on the sides of the tobacco portion. For example, the tobacco portion may have a planar substrate (which may comprise tobacco or another material) on which the tobacco ridges are formed / deposited. Because the ridges are raised from the substrate, channels are formed between the ridges, allowing the generated aerosol to accumulate and flow along the consumable from the cavity (for example, towards the mouthpiece portion). The channels may be straight or may have bends / curves according to design requirements. 【0039】 As can be seen in Figures 4A and 4B, the raised portions 112 on each side of the consumable 110 are positioned to substantially align with the higher power density regions of the respective heaters 70 and 90 (i.e., the set of linear portions 74 80 in the first heater 70 and the pair of linear track portions 94 100 in the second heater 90). In this way, the higher power density regions are located above the tobacco portion, in close proximity to or in direct contact with the tobacco portion, thereby optimizing heat flux / heat transfer and improving the heating efficiency of the device. 【0040】 The consumable may further include packaging material that wraps around the tobacco / aerosol-forming material portion of the consumable. Figure 5 shows packaging material 150 without an internal tobacco portion. The packaging material 150 is made from paper, cardboard, or a thin plastic sheet material and functions like a sleeve for the tobacco portion. The packaging material is exposed at its end 152, allowing airflow to pass through the consumable to the mouthpiece. The packaging material 150 further includes holes 154 cut into the packaging material 150. Ideally, the location of the holes 154 is determined considering the tobacco portion for which the packaging material 150 is intended. For example, the holes 154 may correspond to grooves in the tobacco portion (e.g., groove 114 in Figure 4), as well as cavity air inlet holes in the device heater portion, and may be at least partially aligned. When the consumable is positioned away from the closed end of the cavity, the packaging material holes 154 may not be used, thereby allowing air to simply enter the consumable from the exposed end 152. 【0041】 Figure 6 shows the consumable 200 wrapped in the heater portion 202 of the apparatus, with the top heater removed so that the consumable 200 can be more clearly seen within the apparatus oven. The consumable 200 is located on the bottom heater 204 which forms part of the wall of the apparatus cavity. The consumable 200 comprises a cigarette portion 206 having a plurality of ridges 208 and a plurality of grooves 210. The consumable 200 also comprises a packaging material 212 having a plurality of holes 214, 216. In this example, the holes 214, 216 are located at different points along the length of the packaging material 212. In other words, some of the holes 216 are located closer to the end 218 of the consumable 200, while the other holes 214 are located slightly further away from the end 218. In either case, all holes 214, 216 are positioned toward the same end 218 of the consumable 200 so that the air entering the cavity must travel along the surface of the tobacco portion 206 and carry the generated aerosol to the mouthpiece. Positioning the holes 214, 216 at different points along the length of the packaging material may result from design considerations to affect or control the pressure drop or draw resistance of the combined device-consumable system. As can be seen from Figure 6, the hole 214 is only partially aligned with the groove 210 of the tobacco portion, thereby potentially partially obstructing the air passing through the hole 214 by the ridge 208 adjacent to the groove. 【0042】 As described below with reference to Figures 7A and 7B, the concept of controlling draw resistance or pressure drop by the arrangement and alignment of the surface features of the oven wall aperture (oven air inlet) and tobacco portion has been further developed with respect to the aperture (or cavity defining wall) of the packaging material hole and heater substrate. 【0043】 Figures 7A and 7B show schematic diagrams of the cavity in the heater portion 250 of the apparatus according to the present invention. Heater substrates 252 and 254 define a portion of the cavity, and the substrates 252 and 254 have apertures 256 towards the ends of the substrates 252 and 254 closer to the closed end 258 of the cavity. Figure 7A shows an arrangement in which the hole 302 of the packaging material of the inserted consumable 300 is partially aligned with the substrate aperture 256, and Figure 7B shows another arrangement in which the packaging material hole 302 is fully aligned with the substrate aperture 256. A method for designing the heater portion 250 to allow consumables to be inserted into the cavity at different depths will be readily apparent to those skilled in the art. 【0044】 As can be understood, the partial alignment of the airflow channels in the tobacco portion and / or packaging material holes 302 with the substrate aperture 256 shown in Figure 7A results in higher pressure draw for the user. In other words, the resistance to draw or suction from the device-consumable arrangement in Figure 7A is increased due to the partial alignment of the airflow channels and / or holes 302 and the aperture 256. Conversely, in the device-consumable arrangement in Figure 7B, when the airflow channels and / or packaging material holes 302 are fully aligned with the aperture 256 of the substrates 252, 254, the pressure draw or draw resistance decreases. 【0045】 Figures 8A and 8B show different schematic diagrams of consumables in the cavity of the heater section 350 within the device. Figure 8B shows a cross-sectional view of the cavity end region indicated by the square 355 in Figure 8A. 【0046】 Figure 8A shows the heater portion 360 and mouthpiece portion 362 of the device, where two heaters 364 form part of a wall 366 defining the cavity 368. In this particular example, the heaters 364 are similar to those described with reference to Figures 2B and 3B, with notches formed at the ends of each heater substrate to provide air inlets 370 for the cavity 368. However, it should be understood that other forms of air inlets and apertures may be provided in the heaters described in Figures 2A, 3A, and 3B, etc. 【0047】 The aerosol-forming consumable 380 is inserted into the cavity 368 and includes a tobacco portion 382. As can be seen in Figure 8B, the tobacco portion 382 has a plurality of ridges 384 and a plurality of grooves 386 on each side, with each ridge having a groove corresponding to the opposite side of the tobacco portion 382. When the tobacco portion 382 is heated by the heat generated by the heater 364, an aerosol is formed that can move along the grooves 386 of the tobacco portion toward the mouthpiece portion 362. 【0048】 In the specific example shown in Figure 8A, the consumable 380 does not reach the closed end of the cavity 368 after insertion. In other words, a gap 390 is provided between the closed end of the cavity 368 and the end of the consumable 380. In this example, when the user inhales, outside air enters the gap 390 in the cavity 368 and is drawn towards the mouthpiece portion 362. As understood, the airflow from the inlet hole 370 to the mouthpiece portion 112 travels along the groove 386 of the consumable cigarette portion, delivering the generated aerosol to the user. 【0049】 Figure 8B shows another cross-sectional view of the apparatus and heater arrangement of Figure 8A, where the base wall defining the closed end of the cavity has been removed, and the consumable 380 is received up to where the base wall is located (i.e., the closed end of the cavity 368) such that there is virtually no gap between the end of the consumable 380 and the closed end of the cavity. In this example, outside air reaches the consumable 380 directly after passing through the air inlet 370. Thus, as can be seen from Figure 8B, the design and features of the consumable 380 affect the airflow entering the cavity 368 through different air inlet 370s. Some of the inlet 370s are blocked by the raised portion 384 of the tobacco portion 382, ​​thereby blocking or obstructing the airflow through those particular 370s and increasing the suction resistance of the apparatus. Other inlet 370s are aligned with or partially aligned with the groove 386 of the tobacco portion 382, ​​and the airflow is not obstructed (or is not obstructed much). Therefore, as can be understood, the design of the consumables and air inlet / aperture, and the degree of insertion depth of the consumables within the cavity, can provide different suction resistance and pressure drops within the device.

Claims

[Claim 1] An aerosol generation system comprising an aerosol generator and aerosol generation consumables, The aerosol generator, A first wall and a second wall define a cavity between them for receiving the aerosol generating consumables, A heater comprising a first substrate on which a first heater track is disposed, and a second substrate on which a second heater track is disposed, wherein the first heater substrate defines at least a portion of the first wall, the second heater substrate defines at least a portion of the second wall, and the layout of the first heater track differs from the layout of the second heater track. Equipped with, An aerosol generating system in which the aerosol generating consumable comprises an aerosol-forming material having a set of one or more protrusions on a first side thereof, and at least a portion of the one or more protrusions is aligned with the layout of the first heater track when the aerosol generating consumable is inserted into the cavity in a first orientation. [Claim 2] The aerosol generating system according to claim 1, wherein the aerosol-forming material has a second set of one or more raised portions on the second side of the aerosol-forming material. [Claim 3] The aerosol generating system according to claim 2, wherein at least a portion of the one or more raised portions of the second set is aligned with the layout of the second heater track when the aerosol generating consumable is inserted into the cavity in the first orientation. [Claim 4] The aerosol generating system according to claim 2, wherein one or more airflow channels are formed along the one or more ridges of the first set and / or second set of the one or more ridges on the first side or the second side of the aerosol-forming material when the aerosol generating consumable is inserted into the cavity. [Claim 5] The aerosol generating system according to claim 4, wherein the aerosol generating consumable is provided with one or more grooves on the first and second sides of the aerosol-forming material, opposite to the one or more raised portions of the first and second sets of the one or more raised portions, so as to provide a wave shape. [Claim 6] The aerosol generating system according to claim 4, wherein the aerosol generating consumable further comprises a packaging material sleeve surrounding the aerosol forming substance. [Claim 7] The aerosol generating system according to claim 1, wherein the aerosol generating consumable further comprises a marking for inserting the aerosol generating consumable into the aerosol generating device in the first orientation, and optionally comprises a logo on which the marking is printed. [Claim 8] The aerosol generating system according to claim 6, wherein the packaging material sleeve has one or more holes, preferably the one or more holes of the packaging material sleeve are positioned above the one or more airflow channels described in claim 4. [Claim 9] The aerosol generating system according to claim 1, wherein the first heater track and / or the second heater track are at least partially embedded in the first substrate and / or the second substrate, respectively, such that the first wall and the second wall defined by the first heater substrate and / or the second heater substrate are substantially flat. [Claim 10] The aerosol generating system according to claim 8, wherein the first heater track and the second heater track each comprise one or more straight sections arranged along a line substantially parallel to the longitudinal direction of the cavity, and the straight sections of the first heater track and the second heater track are offset from each other when viewed along an axis parallel to the surface normals of the first wall and the second wall. [Claim 11] The aerosol generating system according to claim 10, wherein the straight sections of the first heater track and / or the second heater track are irregularly arranged across the respective widths of the first substrate and the second substrate. [Claim 12] The aerosol generating system according to claim 10 or 11, further comprising at least one aperture on the first substrate and / or the second substrate, preferably at least one aperture positioned between two linear sections of the first substrate and the second substrate, respectively. [Claim 13] The aerosol generating system according to claim 12, wherein at least one of the one or more holes in the packaging material sleeve is at least partially aligned with at least one aperture when the aerosol generating consumable is inserted into the cavity. [Claim 14] The aerosol generating system according to claim 1, wherein the first substrate and the second substrate each comprise a ceramic material, and the first heater track and the second heater track each comprise an electrical resistance material, preferably the electrical resistance material being a metallic material.

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