Aerosol generating consumables

Abstract

1. An aerosol-generating consumable (100), comprising: an aerosol substrate portion (102) including an inlet end (104) through which air is drawn into the aerosol substrate portion (102) and an outlet end (106) through which aerosol exits the aerosol substrate portion (102), the aerosol substrate portion (102) extending longitudinally from the outlet end (106) to the inlet end (104); and a combustible heat source (108) configured to be ignited to heat the aerosol substrate portion (102), the combustible heat source (108) being positioned longitudinally to overlap a portion of the aerosol substrate portion (102), the inlet end (104) of the aerosol substrate portion (102) being configured to extend longitudinally beyond a tip (110) of the combustible heat source (108).

Description

Technical Field

[0001] The present disclosure relates to aerosol-generating consumables, such as heat-not-burn consumables. The present disclosure also relates to an aerosol-generating device for use with the aerosol-generating consumable.

Background Art

[0002] Various devices and systems are available that heat an aerosol substrate consumable to release aerosol / vapor for inhalation, rather than relying on burning the aerosol substrate consumable. For example, electronic cigarettes vaporize an electronic liquid into an inhalable vapor. However, while electronic liquids in electronic cigarettes are prone to leakage, they have the advantage of fast volatilization time, and alternative devices with solid consumables are available. However, such devices require the heater to be part of the device, which introduces additional complexity and cost in the device.

[0003] Aerosol substrate consumables comprising a combustible heat source are known. In this case, the combustible heat source may be ignited to burn the aerosol substrate without burning it and transfer heat to the aerosol substrate. In one example, the combustible heat source may be in a tubular arrangement to enclose the entire aerosol substrate material positioned therein. However, the use of a combustible heat source may lead to the user inhaling combustion gases generated due to the combustion of the combustion heat source, which is undesirable. Controlling heat distribution to the aerosol substrate material to avoid combustion of the aerosol substrate material is a further challenge of existing combustion heat sources.

Summary of the Invention

Problems to be Solved by the Invention

[0004] It is an object of the present invention to overcome at least one of the problems mentioned above or to provide an alternative solution.

Means for Solving the Problems

[0005] The present disclosure provides an aerosol-generating consumable (or aerosol-generating article) having the features defined in the claims.

[0006] In one example, an aerosol generating consumable is provided, the aerosol generating consumable includes an aerosol substrate portion, which includes an inlet end for air to be drawn into the aerosol substrate portion and an outlet end for aerosols to exit the aerosol substrate portion, the aerosol substrate portion extending longitudinally from the outlet end to the inlet end, and a combustible heat source configured to be ignited to heat the aerosol substrate portion, wherein the combustible heat source is positioned to overlap a portion of the aerosol substrate portion in the longitudinal direction, and the inlet end of the aerosol substrate portion extends longitudinally beyond the tip of the combustible heat source.

[0007] Providing a flammable heat source that overlaps with the aerosol substrate means that heat can be applied more uniformly to the aerosol substrate during the inhalation session, reducing the chance of carbonization or combustion of the aerosol substrate during use, thus providing the user with an improved sensory experience.

[0008] Furthermore, since the inlet end of the aerosol substrate portion is configured to extend beyond the tip of the flammable heat source in the longitudinal direction, the opportunity for the user to inhale combustion gases generated by the combustion of the flammable heat source during an inhalation session is reduced.

[0009] In one example, the base end of the flammable heat source extends to a region upstream of the outlet end of the aerosol substrate portion. Because the base end of the flammable heat source terminates slightly upstream of the outlet end of the aerosol substrate portion, the user is kept away from the flammable heat source, reducing the risk of inhaling combustion gases. This is particularly relevant when using aerosol generating devices with one or more air channels, as described below, because combustion gases can exit the device through one or more air channels. In addition, because the base end of the flammable heat source terminates slightly upstream of the outlet end of the aerosol substrate portion, the generated aerosol can be cooled to a suitable temperature before being inhaled. The distance (or gap) also reduces heating of the cooling segment or filter downstream of the aerosol substrate portion, thus reducing the likelihood of combustion gases being generated near the user's nose. Furthermore, due to diffusion and convection during inhalation, the flammable heat source does not need to extend along the entire length of the aerosol substrate portion.

[0010] In one example, the aerosol generating consumable includes a metal layer enclosing the aerosol substrate portion and extending at least from the inlet end to the outlet end of the aerosol substrate portion. The metal layer reduces (or prevents) combustion gases from passing through the aerosol substrate portion during use. The metal layer also helps to transfer and spread heat generated from a flammable heat source to the aerosol substrate portion.

[0011] In one example, an aerosol-generating consumable includes a paper layer that encloses the aerosol substrate portion and extends at least from the inlet end to the outlet end of the aerosol substrate portion. The paper enclosing the layer helps dissipate heat, reducing the likelihood of burns when the user handles the consumable after use. Paper is also a common, sustainable, inexpensive, and manufacturable material for use in enclosing different components.

[0012] The flammable heat source may take the form of a tubular layer surrounding the aerosol substrate portion. The tubular layer of the flammable heat source may be used in conjunction with a substantially cylindrical aerosol generating consumable, which is relatively easy to manufacture. The tubular layer of the flammable heat source also provides a method for uniformly heating the aerosol substrate portion.

[0013] In one example, the flammable heat source includes a repeating pattern along its longitudinal direction, where a region of higher height and / or width is followed by a region of lower height and / or width. The variation in height and / or width means that the rate at which the flammable heat source burns can be varied along its length, thereby controlling the heating of the aerosol substrate portion and, consequently, the duration of the inhalation session.

[0014] The flammable heat source may be arranged in a meandering path extending along the longitudinal direction. The meandering path means that the rate at which the flammable heat source burns can be varied along its length, thereby controlling the heating of the aerosol substrate portion and, consequently, the duration of the inhalation session.

[0015] In one example, the aerosol generating consumable includes a base-end filter at or near the outlet end of the aerosol substrate portion. The base-end filter is configured to filter specific components from the aerosol during use.

[0016] In one example, the aerosol generating consumable includes a cooling segment, such as a paper tube, for cooling the aerosol. The cooling segment may be used in addition to or instead of the base filter.

[0017] In one example, the aerosol generating consumable includes a tip filter at the inlet end of the aerosol substrate portion. The tip filter may be configured to capture combustion gases (such as carbon-based gases) and thus reduce the amount of combustion gases inhaled by the user during an inhalation session.

[0018] In one example, at least one of the base filter and / or tip filter includes graphene. Graphene is suitable for capturing carbon-based combustion gases and therefore reduces (or prevents) the user from inhaling combustion gases during an inhalation session.

[0019] In one example, the flammable heat source includes a carbon layer or graphite. The carbon layer or graphite may contain ignition agents such as potassium salts like KNO3, KOH, and K2CO3.

[0020] The aerosol generation system includes an aerosol generation device and aerosol generation consumables.

[0021] In one example, an aerosol generating device is provided for generating an aerosol by combustion of a flammable heat source of an aerosol generating consumable, the device including a chamber for housing a portion of the aerosol substrate and a flammable heat source when in use, the chamber being positioned to surround the flammable heat source when the aerosol generating consumable is positioned in the insertion position within the chamber.

[0022] The device is configured for use with aerosol generating consumables and is designed to prevent the user from coming into contact with flammable heat sources during use, thereby improving safety. Furthermore, the aerosol generating device is configured to keep heat within the chamber, avoiding heat dissipation around the aerosol generating consumables.

[0023] In one example, the tip of the chamber includes a chamber air inlet configured to allow air to be drawn into the inlet end of the aerosol substrate portion of the aerosol generating consumable. The air inlet provides a method for allowing air to enter the chamber without mixing with the combustion gas.

[0024] In one example, the chamber air inlet is fluidically isolated from a flammable heat source when the aerosol generating consumable is positioned in its insertion position within the chamber. The insertion position may be considered to be when the aerosol generating consumable contacts the front of the chamber or a stopper within the chamber. Fluidly isolating the chamber air inlet from a flammable heat source, or moving the air inlet away from a flammable heat source, reduces the amount of combustion gases inhaled by the user.

[0025] In one example, the chamber (or housing) includes one or more air channels or conduits disposed downstream of the combustible heat source when the aerosol-generating consumable is positioned at the insertion position. The channels or conduits preferably extend from the interior of the chamber to the outer surface of the housing. These provide vents for combustion gases to exit the aerosol-generating device, as well as air inlets for supplying oxygen to the combustible heat source for combustion.

[0026] In one example, the aerosol-generating device includes an ignition device or lighter configured to ignite the tip of the combustible heat source. Providing a lighter within the device simplifies the user experience.

[0027] In one example, the ignition device or lighter is configured to reach an ignition temperature of at least about 380°C, preferably at least about 420°C, and most preferably at least about 500°C.

[0028] In one example, the device includes a control unit configured to switch on the ignition device or lighter, and to switch off the ignition device or lighter after reaching the ignition temperature of the combustible heat source and / or after a period comprised between 5 and 30 seconds is reached.

[0029] In one example, there is provided a system comprising the aerosol-generating device described above and the aerosol-generating consumable described above.

[0030] In one example, there is provided a method of using the aerosol-generating device described above, the method comprising inserting the aerosol-generating consumable described above into the aerosol-generating device, and igniting the tip of the combustible heat source using the ignition device of the aerosol-generating device.

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The accompanying drawings are as follows. [Brief Description of the Drawings]

[0032] [Figure 1] Examples of aerosol-generating consumables are shown. [Figure 2] An example of a flammable heat source in an unencased form is shown. [Figure 3] Here is another example of a flammable heat source in an unencased form. [Figure 4A] An example of an aerosol generating device is shown. [Figure 4B] An example of an aerosol generation system, including an aerosol generation device and aerosol generation consumables, is shown. [Modes for carrying out the invention]

[0033] As used herein, the term aerosol substrate is a label used to mean a medium that generates an aerosol or vapor when heated. This may be synonymous with a smokeable material or an aerosol-generating medium. An aerosol substrate typically comprises a liquid or solid material that provides a volatile component upon heating, typically in the form of vapor or aerosol. An aerosol substrate may be a tobacco-free material or a tobacco-containing material. An aerosol substrate may include, for example, one or more tobacco itself, tobacco derivatives, puffed tobacco, re-tobacco, tobacco extracts, homogenized tobacco, or tobacco substitutes. An aerosol substrate may also include other non-tobacco products, which may or may not contain nicotine depending on the product. An aerosol substrate may include one or more humectants, such as glycerin or propylene glycol.

[0034] Figure 1 shows an example of an aerosol generating consumable 100. The aerosol generating consumable 100 includes an aerosol substrate portion 102 configured to generate an aerosol / vapor when heated. The aerosol substrate portion 102 has an inlet end 104 (or tip) through which air can be drawn into the aerosol substrate portion 102. The aerosol substrate portion 102 also has an outlet end 106 (or base end) through which the generated aerosol exits the aerosol substrate portion 102.

[0035] The aerosol substrate portion 102 may extend substantially longitudinally from the exit end 106 to the inlet end 104. That is, the aerosol substrate portion 102 defines a longitudinal axis between the exit end 106 and the inlet end 104, and the aerosol substrate portion 102 extends along this longitudinal axis.

[0036] The aerosol generating consumable 100 includes a combustible heat source 108 configured to be ignited or burned to heat the aerosol substrate portion 102. The combustible heat source 108 is positioned to overlap a portion of the aerosol substrate portion 102 in its longitudinal direction. The inlet end 104 (or tip) of the aerosol substrate portion 102 is configured to extend longitudinally beyond the end (tip 110, etc.) of the combustible heat source 108. That is, the inlet end 104 of the aerosol substrate portion 102 protrudes beyond the tip 110 of the combustible heat source 108, which provides a path or gap through which any gas generated from the combustion of the combustible heat source 108 can leak without passing through the aerosol generating portion 102. In other words, the combustible heat source 108 is configured to extend from the region downstream of the inlet end 104 of the aerosol generating portion 102 toward the outlet end 106 of the aerosol generating portion 102.

[0037] The recess 112 (or inlet recess) may be formed in a location where the flammable heat source 108 does not overlap with the aerosol substrate portion 102 toward (or at) the inlet end 104. The recess 112 may be formed by the aerosol generating portion 102 extending beyond the combustion heat source 108 toward the inlet end 104. Since the combustion gases do not pass through the aerosol substrate portion 102, the likelihood of the user inhaling them when using the aerosol generating consumable 100 is lower.

[0038] The flammable heat source 108 is positioned so as to overlap a portion of the aerosol substrate portion 102 in the longitudinal direction, so that heat is uniformly distributed by the aerosol substrate portion 102 during use. That is, the flammable heat source may be ignited (or burned / combusted) first at the tip 110, and therefore the inlet end 104 of the aerosol substrate portion 102 is initially heated to a higher temperature to volatilize the aerosol. The flammable heat source 108 then burns in the direction indicated by arrow A in Figure 1 (i.e., from the tip 110 to the base end 114). As the point of combustion moves in the direction indicated by A, aerosol is generated from adjacent sections of the aerosol substrate portion 102. In one example, it takes approximately 3 to 5 minutes for the flammable heat source 108 to burn from the tip 110 to the base end 114. Providing the flammable heat source 108 around the aerosol substrate portion 102 in an overlapping arrangement configuration improves the heat distribution along the aerosol substrate portion 102 during the inhalation session, and therefore reduces the opportunity for localized carbonization. In other words, the maximum level of heat applied to the aerosol substrate portion 102 is applied to different regions of the aerosol substrate portion throughout the inhalation session (for example, initially the maximum heat is applied to the inlet end 104 or a region near the inlet end 104, and then, as the flammable heat source 108 burns toward the base end, the maximum heat applied to the aerosol substrate portion 102 moves with the point of combustion). Thus, substantially the entire aerosol generating portion 102 can be "used" to generate aerosols during the inhalation session. The process for combustion of the flammable heat source 108 is described in more detail below.

[0039] In the example shown in Figure 1, the packaging layer 116 may be present around the aerosol substrate portion 102. The packaging layer 116 may extend at least from the inlet end 104 to the outlet end 106 of the aerosol substrate portion 102, and optionally beyond the end of the outlet end 106 of the aerosol substrate portion 102. The packaging layer 116 may be located between the flammable heat source 108 and the aerosol substrate portion 102. The packaging layer 116 is configured to prevent combustion gases from passing directly from the flammable heat source 108 to the aerosol substrate portion 102 during use.

[0040] When combined with the recess 112 described above, the packaging layer 116 reduces the amount of combustion gas inhaled by the user during an inhalation session of the aerosol generating consumable 100.

[0041] In one example, the packaging layer 116 includes a metal layer such as aluminum foil. The metal layer is configured to transfer heat generated by the flammable heat source 108 to the aerosol substrate portion 102 and to prevent combustion gases from passing through to the aerosol substrate portion 102.

[0042] In one example, the packaging layer 116 includes a paper layer. The paper packaging layer may be used in addition to or instead of the metal layer. The packaging layer is configured to prevent thermal decomposition and localized combustion of the aerosol substrate portion 102. The packaging layer 116 also facilitates the manufacture of the aerosol generating consumable 100 and provides further structural / rigidity to the aerosol generating consumable 100.

[0043] In some examples, the aerosol generating consumable 100 includes a base filter 120 (or mouth filter). The base filter 120 may be located downstream of the outlet end 106 of the aerosol substrate portion 102. In one example, the base filter 120 abuts against the outlet end 106 of the aerosol substrate portion 102. In another example, the base filter 120 is kept separated from the aerosol substrate portion 102 by an intermediate cooling segment, for example, a tubular member (not shown). The cooling segment can therefore contribute to cooling the aerosol without increasing resistance to extraction. The base filter 120 may include cellulose acetate, paper, graphene and / or charcoal, etc. The base filter 120 may be formed of one or more segments. A non-filtering tubular member can lengthen the filter at the mouth end of the consumable 100.

[0044] In some examples, the aerosol generating consumable 100 includes a tip filter 122. The tip filter 122 is configured to act as a carbon capture filter to obstruct (or reduce the amount of) carbon-based combustion gases flowing into the inlet end 104 of the aerosol substrate portion 102. In one example, the tip filter 122 contains graphene, which is particularly suitable for capturing carbon-based gases. In some examples, the tip filter 122 contains cellulose acetate.

[0045] In one example, the flammable heat source 108 is configured to heat the aerosol substrate portion 102 essentially via conductive heating. As shown in Figure 1, in one example, the flammable heat source 108 is configured to be located around a portion of the aerosol substrate portion 102. In the illustrated example, the flammable heat source 108 is configured to be adjacent to the aerosol substrate portion 102. In the illustrated example, the flammable heat source 108 is configured to be adjacent to the aerosol substrate portion 102. As described above, the packaging layer 116 may still be present between the flammable heat source 108 and the aerosol substrate portion 102, but “adjacent” should not be limited to direct contact, but rather close enough so that the heat generated by the combustion of the flammable heat source is sufficient to volatilize the aerosol from the aerosol substrate portion 102.

[0046] The combustible heat source 108 may contain a layer of carbon (or graphite / coal) that burns and generates heat when ignited. One or more igniters may be present in the combustible heat source 108 to assist in its combustion. For example, the ignition temperature of the carbon layer may be lowered by igniting one or more igniters, such as potassium additives. In one example, one or more igniters include potassium salts (KNO3). The use of KNO3 can lower the ignition temperature of the carbon layer from approximately 690°C to 720°C to approximately 565°C to 595°C. Other potassium salts, such as KOH or K2CO3, may also be used to lower the ignition temperature of the carbon layer.

[0047] As shown in Figure 1, the flammable heat source 108 may be arranged in a tubular configuration around a portion of the aerosol substrate portion 102. That is, the aerosol substrate portion 102 may be substantially cylindrical, and the flammable heat source 108 forms a tube around it.

[0048] As described above, the flammable heat source 108 does not extend all the way to the inlet end 104 of the aerosol substrate portion 102, but rather stops at a predetermined distance from the inlet end 104. In one example, the predetermined distance depends on the radius of the aerosol generating consumable 100. For example, the predetermined distance may be half to twice the radius. For example, if the radius of the consumable 100 is 4 mm, the predetermined distance may be 2 mm to 8 mm. This ratio of the predetermined distance ensures that there is enough heat to provide to the inlet end 104 of the aerosol substrate portion 102, while also limiting the amount of combustion gas entering the aerosol substrate portion 102 during use.

[0049] In one example, the flammable heat source 108 is stopped at a second predetermined distance from the outlet end 106 of the aerosol substrate portion 102. Such an arrangement configuration forms a recess 118 (or outlet recess) at the outlet end 106 of the aerosol substrate portion 102. Providing the outlet recess 118 reduces the risk of the user inhaling combustion gases because they are further away from the flammable heat source 108. In addition, because the base end 114 of the flammable heat source 108 terminates a short distance upstream of the outlet end 106 of the aerosol substrate portion 102, the generated aerosol can be cooled to a suitable temperature before being inhaled by the user. The distance (or gap) also reduces heating of the cooling segment or filter downstream of the aerosol substrate portion 102, and therefore reduces the possibility of combustion gases being generated near the user's nose. Furthermore, due to diffusion and convection during inhalation, the flammable heat source 108 does not need to extend across the entire aerosol substrate portion 102. In one example, the second predetermined distance depends on the radius of the aerosol generating consumable. For example, this may be equal to a distance equal to the radius ~ four times the radius of the aerosol generating consumable 100.

[0050] In another example, the flammable heat source continues to the outlet end 106 of the aerosol substrate portion 102.

[0051] Figure 2 shows an example of a flammable heat source 108 in an "unwrapped" (or flat) configuration. The flammable heat source 108 shown in Figure 2 is wrapped around the packaging layer 116 (or directly around the aerosol substrate portion 102) to form the aerosol generating consumable 100 described in Figure 1.

[0052] In the example shown in Figure 2, the combustible heat source 108 includes varying heights h along its length. That is, along the longitudinal direction of the combustible heat source 108, a high region 124 is followed by a short region 124. In other words, the combustible heat source 108 includes a repeating pattern along its longitudinal direction, where a high height (and thickness and / or width) region is followed by a low height (thickness and / or width) region. This arrangement configuration provides control over the rate at which the combustible heat source 108 burns. The combustible heat source 108 takes longer to burn in the high region 124 than in the short region 124. During the construction of the combustible heat source 108, the relative sizes of the high region 124 and the short region 124 can be set to control the burning rate of the combustible heat source 108.

[0053] Figure 3 shows another example of a flammable heat source 108 in an "unwrapped" (or flat) configuration. The flammable heat source 108 shown in Figure 3 is wrapped around the packaging layer 116 (or directly onto the aerosol substrate portion 102) to form the aerosol generating consumable 100 shown in Figure 1.

[0054] In Figure 3, the combustible heat source 108 is arranged in a meandering (or undulating) path extending along the longitudinal direction. Similar to the example in Figure 2, this arrangement configuration can be used to control the rate at which the combustible heat source 108 is configured to burn. In one example, the combustible heat source 108 may be in the form of a square wave arrangement configuration along the longitudinal direction.

[0055] Generally, the combustible heat source 108 may have a uniform thickness such that the volume of the combustible heat source is 5% to 20% of the volume of the aerosol substrate portion 108. In other examples, the thickness of the combustible heat source 108 varies along its length.

[0056] Figure 4A shows an example of an aerosol generating device 200 for use with an aerosol generating consumable 100. In Figure 4A, the aerosol generating consumable 100 is not present within the device 200. The aerosol generating device 200 includes a housing 202 configured to be held by the user during use. The housing 202 includes an insulator suitable for reducing the amount of heat transmitted to the user holding the device 200. The device 200 includes a chamber (or consumable cavity or sheet) 204 for housing the aerosol generating consumable 100 during use. The chamber 204 may have a shape complementary to the consumable 100. During use, the chamber 204 is configured to house at least a portion of the aerosol substrate portion 102 and a flammable heat source 108. The chamber 204 is positioned to surround the flammable heat source 108 when the aerosol generating consumable 100 is positioned in the insertion position within the chamber. The insertion position of the aerosol generating consumable 100 can be considered to be when the aerosol generating consumable 100 is inserted into the aerosol generating device 200 such that the tip of the aerosol generating consumable 100 abuts against the stopper (or sheet) inside the chamber 204. In another example, the insertion position can be considered to be when the tip of the aerosol generating consumable 100 abuts against the tip 206 of the chamber 204.

[0057] The tip 206 of the chamber 204 may include a chamber air inlet 208 configured to allow air to be drawn into the inlet end 104 of the aerosol substrate portion 102 of the aerosol generating consumable 100 during use. The chamber air inlet 208 allows air to be drawn into the chamber 204 from outside the housing 202 during use.

[0058] In one example, the aerosol generating device 200 includes an ignition device 210 or a lighter configured to ignite the tip (or upstream end) 110 of a flammable heat source 108 when in use. The ignition device 210 may produce a spark or a hot area sufficient to initiate combustion at the tip 110 of the flammable heat source 108. The ignition device 210 may take the form of a heat ray or spark discharge generator. The lighter is a metal heated by an electric current. In some examples, the lighter includes an infrared radiation source. The ignition device 210 may be activated in response to user input (such as pressing a button or swiping a pad).

[0059] Figure 4B shows an example of an aerosol generation system in which an aerosol generating consumable 100 (shown in Figure 1) is inserted into an aerosol generating device 200. In this example, the aerosol generating consumable 100 is configured to abut against the tip 206 of the chamber at the insertion position. At this position, the air drawn into the aerosol generating consumable 100 does not mix with the combustion gas. That is, the fluid path of the air drawn into the consumable 100 is fluidly isolated from the combustion gas generated by the flammable heat source 108. The contact of the tip of the consumable 100 against the tip 206 of the chamber 204 (or the stopper, if present) obstructs (or reduces) the flow of combustion gas into the aerosol generating consumable 100 during use.

[0060] In one example, the chamber 204 includes one or more air channels or conduits 212 located downstream of the flammable heat source 108 when the aerosol generating consumable 100 is positioned in the insertion position. One or more air channels 212 may be configured to extend substantially radially (for example, perpendicular to the longitudinal axis of the aerosol generating consumable 100 when inserted into the aerosol generating device 200). One or more air channels 212 provide vents for combustion gases generated by the combustion of the flammable heat source 108 to exit the aerosol generating device 200 without being inhaled by the user.

[0061] In one example, one or more grooves (not shown) are provided in the chamber 206 to allow air to flow from one or more air channels 212 along the length of the combustible heat source 108 to assist in the combustion of the combustible heat source 108.

[0062] While preferred embodiments have been illustrated and described, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the scope of the invention as defined in the appended claims and described above.

Claims

1. an aerosol substrate portion (102) comprising an inlet end (104) for air to be drawn into the aerosol substrate portion (102) and an outlet end (106) for aerosols to exit the aerosol substrate portion (102), wherein the aerosol substrate portion (102) extends longitudinally from the outlet end (106) to the inlet end (104), A combustible heat source (108) configured to be ignited in order to heat the aerosol substrate portion (102) and Includes, The flammable heat source (108) is arranged so as to overlap with a part of the aerosol substrate portion (102) in the longitudinal direction. The inlet end (104) of the aerosol substrate portion (102) is configured to extend beyond the tip (110) of the flammable heat source (108) in the longitudinal direction. Aerosol generating consumables (100).

2. The aerosol generating consumable (100) according to claim 1, wherein the base end (114) of the flammable heat source (108) extends to the region upstream of the outlet end (106) of the aerosol substrate portion (102).

3. The aerosol generating consumable (100) according to claim 1, comprising a metal layer surrounding the aerosol substrate portion (102), and extending from the inlet end (104) to at least the outlet end (106) of the aerosol substrate portion (102).

4. The aerosol generating consumable (100) according to claim 1, comprising a paper layer enclosing the aerosol substrate portion (102), and extending at least from the inlet end (104) to the outlet end (106) of the aerosol substrate portion (102).

5. The aerosol generating consumable (100) according to claim 1, wherein the flammable heat source (108) forms a tubular layer around the aerosol substrate portion (102).

6. The aerosol generating consumable (100) according to claim 1, wherein the flammable heat source (108) includes a repeating pattern in which a region of high height and / or width (124) is followed by a region of low height and / or width (126) along the longitudinal direction.

7. The aerosol generating consumable (100) according to claim 1, wherein the flammable heat source (108) is arranged in a meandering path extending along the longitudinal direction.

8. The aerosol generating consumable (100) according to claim 1, further comprising a base end filter (120) at or near the outlet end (106) of the aerosol substrate portion (102).

9. The aerosol generating consumable (100) according to claim 1, wherein the inlet end (104) of the aerosol substrate portion (102) includes a tip filter (122).

10. The aerosol generating consumable (100) includes at least one of a base end filter (120) disposed at or near the outlet end (106) of the aerosol substrate portion (102), and a tip end filter (122) disposed at the inlet end (104) of the aerosol substrate portion (102), The aerosol generating consumable (100) according to claim 1, wherein at least one of the base filter (120) and / or the tip filter (122) contains graphene.

11. an aerosol generating consumable (100) according to any one of claims 1 to 10, An aerosol generating device (200) for generating an aerosol by combustion of a flammable heat source (108) of the aerosol generating consumable, wherein the device (200) includes a chamber (204) for housing at least a portion of the aerosol substrate portion (102) and the flammable heat source (108) when in use. Includes, The chamber (204) is positioned so as to surround the flammable heat source (108) when the aerosol generating consumable (100) is positioned in the insertion position within the chamber (204). Aerosol generation system.

12. The aerosol generating system according to claim 11, wherein the tip (206) of the chamber (204) includes a chamber air inlet (208) configured to allow air to be drawn into the inlet end (104) of the aerosol substrate portion (102) of the aerosol generating consumable (100).

13. The aerosol generating system according to claim 12, wherein when the aerosol generating consumable (100) is positioned in the insertion position in the chamber (204), the chamber air inlet (208) is fluidly isolated from the flammable heat source (108).

14. The aerosol generating system according to claim 12, wherein the chamber (204) includes one or more air channels (212) located downstream of the flammable heat source (108) when the aerosol generating consumable (100) is positioned in the insertion position.

15. The aerosol generating system according to claim 11, comprising an ignition device (210) or lighter configured to ignite the tip (110) of the flammable heat source (108).

16. The aerosol generating system according to claim 15, wherein the ignition device or lighter is configured to reach an ignition temperature of at least about 380°C.

17. The aerosol generating system according to claim 15, wherein the device includes a control unit configured to turn on the switch of the ignition device or lighter, and to turn off the switch of the ignition device or lighter after the ignition temperature of the flammable heat source has been reached and / or after a period of time including 5 to 30 seconds has been reached.

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