Aerosol generation system

Abstract

An aerosol generation system (2) comprising: - a case (4) defining an oven cavity (6) having a bottom surface (10) and an opening (12); - a tobacco stick (20) received within the oven cavity (6), the tobacco stick (20) having a first end (22) facing the bottom surface (10); - a first air flow path (44) extending through the oven cavity (6) and the tobacco stick (20), the first air flow path (44) having an inlet (50) and an outlet (52), the inlet (50) being mounted on the bottom surface (10) of the oven cavity (6) and including a nozzle (41) extending through the first end (22). The tobacco stick (20) includes an acetate tube (24) adjacent to the first end (22), the acetate tube (24) including an inner channel (32), and the first air flow path (44) extends through the inner channel (32).

Description

Technical Field

[0001] The present invention relates to an aerosol generation system including a case and a tobacco stick. More specifically, the present invention relates to such an aerosol generation system in the form of an electronic cigarette, e-cigarette, vaporizer, vaping device and related devices.

Background Art

[0002] A conventional aerosol generation system 202 is shown in FIGS. 1 and 2. The conventional aerosol generation system 202 includes a case 204 having an oven cavity 206. FIG. 1 is a cross-sectional view of the wall case 204. FIG. 2 is a detailed cross-sectional view of the oven cavity 206. As shown in FIG. 2, the oven cavity 206 includes a cylindrical wall 208, a bottom surface 210, and an opening portion 212.

[0003] The aerosol generation system 202 further includes a tobacco stick 214. The tobacco stick 214 includes a first end 216 facing the bottom surface 210 and a second end 218 longitudinally opposed to the first end 216.

[0004] With such an arrangement, an air flow path schematically indicated by arrow 220 in FIG. 2 extends through the oven cavity 206 and the tobacco stick 214. As seen in FIG. 2, the air flow path 220 first passes through the opening portion 212, through the radial gap between the tobacco stick 214 and the cylindrical surface 208, through the first end 116 of the tobacco stick 214, through the tobacco particles contained in the tobacco stick 214, and through the second end 218 of the tobacco stick 214. The cylindrical surface 208 can heat the tobacco article contained in the tobacco stick 214. By doing so, the air flowing through the air flow path 220 flows through the heated tobacco particles, thereby generating an aerosol that can be inhaled by the user.

[0005] However, in such a design of the air flow path, since cold air flows against the cylindrical wall 208 before entering the tobacco stick 214, the temperature of the oven cavity decreases for each puff. This cooling of the oven wall causes the vapor to condense on the wall, leaving deposits of dirt. This is inconvenient for the user and further fouls the aerosol generation system so much that the user can no longer even fit the tobacco stick into the oven cavity.

[0006] WO 2022 / 049247 pamphlet discloses an air flow path that is installed inside the oven cavity and includes a frustoconical outer surface that extends through the end of a stick-type aerosol generating article. However, such an arrangement is still not entirely satisfactory because there is still a thermal connection between the cold air flow inside the case and the oven wall, and tobacco particles fall into the oven cavity. Also, such an arrangement is not compatible with an arrangement where the air flow is drawn in from a location near the second end of the tobacco stick.

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] Therefore, there is a need to make the maintenance of the aerosol generation system easier to keep the oven cavity cleaner and improve the sensory performance. Accordingly, an object of the present invention is to provide an improved aerosol generation system that can address the drawbacks of conventional solutions.

MEANS FOR SOLVING THE PROBLEMS

[0008] The above drawbacks are addressed by the subject matter of the independent claims. Further preferred embodiments of the invention are defined in the dependent claims.

[0009] According to one embodiment of the present invention, an aerosol generation system is provided that includes a case defining an oven cavity, the oven cavity having a bottom surface and an opening portion, a tobacco stick at least partially received within the oven cavity having a first end facing the bottom surface, a first air flow path extending through the oven cavity and the tobacco stick, the first air flow path having an inlet fluidly connecting the first air flow path to the exterior of the oven cavity and an outlet fluidly connecting the first air flow path to the exterior of the tobacco stick, the inlet including a nozzle attached to the bottom surface of the oven cavity and extending through the first end, the tobacco stick including an acetate tube adjacent to the first end, the acetate tube including an inner channel, and the first air flow path extending through the inner channel.

[0010] This embodiment avoids cooling of the cylindrical surface of the oven cavity. Thus, the vapor no longer condenses on the cylindrical surface and the dirt is discharged with the vapor. Further, this embodiment avoids tobacco particles from falling into the oven cavity due to the added acetate tube. Thereby, the maintenance of the aerosol generation system is improved, and in particular the oven cavity is cleaner than with conventional solutions.

[0011] Preferably, the acetate tube includes a first front surface, a second front surface, a cylindrical surface extending between the first front surface and the second front surface, and an opening extending between the cylindrical surface and the inner channel.

[0012] Such an opening allows a portion of the first air flow path to flow through the cylindrical surface of the acetate tube where dirt does not accumulate. Thus, this improves the uniformity of the pressure drop through the aerosol generation system and the user experience.

[0013] In another embodiment, the first front surface is close to the bottom surface and the second front surface is distal to the bottom surface, and the inner channel includes a blind bore extending from the first front surface.

[0014] Such an embodiment further prevents the tobacco product from falling into other parts of the aerosol generating system, particularly into the nozzle. By doing so, the uniformity of the pressure drop through the aerosol generating system is further improved.

[0015] Preferably, the nozzle includes a substantially frustoconical outer surface, a first axially extending portion extending through the bottom surface, and a second axially extending portion extending through a first end for penetrating the tobacco stick, wherein the first axially extending portion is close to the end of the longer diameter of the substantially frustoconical outer surface, and the second axially extending portion is close to the end of the shorter diameter of the substantially frustoconical outer surface.

[0016] Preferably, the substantially frustoconical outer surface includes a plurality of circumferential ribs.

[0017] Preferably, the substantially frustoconical outer surface includes external threads.

[0018] In another embodiment, the nozzle includes a cylindrical inner through-hole having a circular axial cross-section.

[0019] Preferably, the cylindrical inner through-hole includes internal threads.

[0020] Such a nozzle design enables the tobacco stick to fit optimally and seal the tobacco stick within the tobacco stick while facilitating insertion of the tobacco stick and avoiding unwanted secondary airflows.

[0021] Preferably, the tobacco stick includes a second end longitudinally opposed to the first end and a thicker portion between the first end and the second end.

[0022] Even though such a thicker portion causes a dent at the bottom of the oven cavity by the puff, in order to avoid an undesirable secondary air flow from the opening portion, it improves the sealing of the radial gap between the tobacco stick and the cylindrical surface of the oven cavity. Therefore, the condensation of the vapor on the cylindrical surface of the oven cavity is further avoided, and as a result, the dirt is more effectively discharged together with the vapor.

[0023] Preferably, the tobacco stick fits slightly into the oven cavity.

[0024] Preferably, the thicker portion includes at least one layer of tipping paper.

[0025] With such a configuration, in conventional solutions such as those shown in FIGS. 1 and 2, by using tipping paper, the user experience is further improved without the paper flavor caused by the air flowing through the tipping paper.

[0026] Preferably, the thickness of the layer of tipping paper is from 0.02 mm to 0.2 mm.

[0027] Preferably, the thicker portion includes 1 to 10 layers of tipping paper.

[0028] With the design of such a thicker portion, the tobacco stick fits slightly into the oven cavity.

[0029] Preferably, the inner channel includes a frustoconical recess having a smaller diameter end proximate to the bottom surface and a larger diameter end distal to the bottom surface.

[0030] It is also possible to assume that the acetate tube includes an array of perforations extending from a second front surface distal to the bottom surface towards a first front surface proximate to the bottom surface.

[0031] Such a design of the inner channel makes it possible to facilitate the distribution of air into the tobacco stick.

[0032] Preferably, the nozzle includes a slide portion.

[0033] By doing so, it is possible to provide a tobacco stick insertion sensor.

[0034] Preferably, the slide portion is ferromagnetic and the sensor includes a Hall effect sensor.

[0035] Such a design of the slide portion and the sensor makes it possible to provide a tobacco stick insertion sensor in a space-saving manner.

[0036] In another embodiment, the case includes an outer cavity, the oven cavity is located within the outer cavity, defining a radial gap between the outer cavity and the oven cavity, and the aerosol generating system includes a heat insulating layer disposed radially outside the oven cavity.

[0037] By doing so, it is possible to more effectively avoid the condensation of vapor on the cylindrical surface of the oven cavity. Accordingly, dirt can be further discharged together with the vapor.

[0038] It is also possible to envision a battery volume and / or an electronic unit, and the case includes a second air flow path that continuously extends through the case, the second air flow path is in fluid communication with the inlet of the first air flow path, and at least a part of the second air flow path is close to the battery volume and / or the electronic unit.

[0039] By doing so, it is possible to cool the hot spot of the aerosol generating system using the air flow, and thus the user experience is improved.

[0040] Preferably, the aerosol generating system further includes a flavor receiving space close to the bottom surface.

[0041] Such a flavor receiving space enables the addition of flavor to the incoming air in a particularly simple manner by simply adding a few drops of flavor or flavor tablets to the bottom surface of the oven cavity.

[0042] For a better understanding of the concepts of the present invention, a plurality of embodiments of the present invention will be described below with reference to the drawings, which should not be considered as limiting the present invention.

Brief Description of the Drawings

[0043]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Mode for Carrying Out the Invention

[0044] Here, embodiments of the present invention will be described with reference to the following figures. Throughout the figures, the same numbers or consecutive similar numbers are used to refer to similar features and components.

[0045] Referring to FIG. 3, the aerosol generation system 2 includes a case 4 that defines an oven cavity 6. In the illustrated embodiment, the oven cavity 6 forms a rotating cylinder. In this specification, the terms "axial direction" and "radial direction" and their derivatives are understood to refer to the circular axial cross-section of the oven cavity 6. The oven cavity 6 includes a cylindrical surface 8, a bottom surface 10, and an opening portion 12.

[0046] The case 4 further includes an outer cavity 14 having a cylindrical shape and an axial cross-section larger than the axial cross-section of the oven cavity 6. The oven cavity 6 is located inside the outer cavity 14. With such an arrangement, a radial gap 16 is defined between the outer cavity 14 and the oven cavity 6.

[0047] An insulating layer 18 is provided on the radially outer side of the oven cavity 6 to provide insulation between the oven cavity 6 and the radial gap 16.

[0048] The aerosol generating system 2 further includes a tobacco stick 20. The tobacco stick 20 is partially received within the oven cavity 6. The tobacco stick 20 includes, in this order, a first end 22, an acetate tube 24, a main body 26, and a second end 28. The first end 22 faces the bottom surface 10 of the oven cavity 6. The second end 28 is longitudinally opposed to the first end 22. The second end 28 is further away from the bottom surface 10 than the opening 12. In other words, the opening 12 is located between the end 22 and the end 28. The acetate tube 24 and the main body 26 may be wrapped with a layer of tipping paper 29 (see FIG. 4).

[0049] The tobacco stick 20 includes a thicker portion 30 provided between the first end 22 and the second end 28. In the illustrated embodiment, the thicker portion 30 is adjacent to the second end 28 and is long enough to extend further away from the second end 28 than the opening 12. Thus, a secondary and undesirable air flow between the tobacco stick 20 and the cylindrical surface 8 is avoided, even though a dent is caused at the bottom of the oven cavity 6 by the puff.

[0050] In the illustrated embodiment, the thicker portion 30 is a layer of tipping paper. The thickness of the layer of tipping paper 30 is from 0.02 mm to 0.2 mm. Alternatively, the thicker portion may include at least two layers of tipping paper, preferably 1 to 10 layers 30 of tipping paper.

[0051] Referring now to FIG. 4, the acetate tube 24 includes an inner channel 32 and a cylindrical surface 34 that extends between a first front surface 36 and a second front surface 38. The first front surface 36 faces the bottom surface 10 of the oven cavity 6. The second front surface 38 is adjacent to the main body 26 and is thus further away from the bottom surface 10 than the first front surface 36.

[0052] In the first embodiment, the inner channel 32 extends between the first front 36 and the second front 38.

[0053] The acetate tube 24 further includes at least one opening 40 extending between the cylindrical surface 34 and the inner channel 32.

[0054] The aerosol generating system 2 further includes a nozzle 41 attached on the bottom surface 10 of the oven cavity 6. More specifically, the nozzle 41 extends through the bottom surface 10, the heat insulation layer 18 and the first end 22 of the tobacco stick 20. In this embodiment, as shown in FIG. 3, the nozzle 41 extends into the inner channel 32.

[0055] With this arrangement, the aerosol generating system 2 defines an upstream air flow path 42 and a downstream air flow path 44.

[0056] The upstream air flow path 42 extends through the case 4 upstream of the oven cavity 6. The upstream air flow path 42 includes an air inlet 46 formed by the opening of the outer cavity 14 and an air outlet 48 formed by the nozzle 41. Therefore, following a puff by the user on the tobacco stick 20, the air flowing through the upstream air flow path 42 passes through the opening of the outer cavity 14 in the radial gap 16 extending between the cylindrical surface of the outer cavity 14 and the heat insulation layer 18 and reaches the nozzle 41.

[0057] The downstream air flow path 44 extends through the oven cavity 6 and the tobacco stick 20. The downstream air flow path 44 includes an inlet 50 corresponding to the nozzle 41 and an outlet 52 corresponding to the second end 28 of the tobacco stick 20. Accordingly, the inlet 50 fluidly connects the downstream air flow path 44 to an upstream air flow path 42 located outside the oven cavity 6. The outlet 52 fluidly connects the downstream air flow path 44 to the outside of the tobacco stick 20. Accordingly, following the user's puff on the tobacco stick 20, the air flowing through the downstream air flow path 44 first passes through the nozzle 41, then through the inner channel 32 of the acetate tube 24, optionally through the opening 40, and then through the heated tobacco particles of the main body 26 of the tobacco stick 20. Finally, the air flowing through the downstream air flow path 44 flows through the outlet 52 formed by the second end 28 for the user to inhale.

[0058] Referring now to FIG. 5, a nozzle 54 according to a second embodiment of the present invention is illustrated. The nozzle 54 can be used in an aerosol generating system such as the aerosol generating system 2 of the first embodiment of the present invention.

[0059] Similar to the nozzle 41, the nozzle 54 is mounted on the bottom surface 10 of the oven cavity 6 and extends through the first end 22 of the tobacco stick 20. More specifically, similar to the nozzle 41, the nozzle 54 implements fluid communication between the inner space of the outer cavity 14 and the inner channel 32 of the acetate tube 24 of the tobacco stick 20.

[0060] The nozzle 54 includes an outer surface 56 that is substantially frustoconical. The outer surface 56 includes an end 58 of a longer diameter and an end 60 of a smaller diameter. The nozzle 54 includes a first axial portion 62 adjacent to the end 58 of the longer diameter, a second axial portion 64 adjacent to the end 60 of the smaller diameter, and a third axial portion 66 located between the axial portion 62 and the axial portion 64.

[0061] The first axial portion 62 extends through the bottom surface 10 of the oven cavity 6. In other words, the end 58 of the longer diameter is adjacent to the outer surface of the heat insulating layer 18. The boundary between the first axial portion 62 and the third axial portion 66 is adjacent to the bottom surface 10. The second axial portion 64 extends through the first end to penetrate the tobacco stick 20. In other words, the end 60 of the smaller diameter is inserted into the tobacco stick 20. More specifically, the end 60 of the smaller diameter is received inside the inner channel 32 of the acetate tube 24. The boundary between the second axial portion 64 and the third axial portion 66 is adjacent to the first end 22 of the tobacco stick 20.

[0062] The nozzle 54 includes a plurality of, for example, three circumferential ribs 68. The circumferential ribs 68 enable the nozzle 54 to optimally fit and seal to the tobacco stick 20, and avoid an undesirable secondary air flow by facilitating the insertion of the tobacco stick 20.

[0063] The nozzle 54 includes an inner through hole 70 that forms the inlet 15. The inner through hole 70 forms a rotating cylinder centered on the same rotation axis as the frustum-shaped outer surface 56. In other words, the inner through hole 70 has a circular axial cross-section centered on the same axis as the circular axial cross-section of the outer surface 56.

[0064] The inner through hole 70 includes an inner thread 72 that can cooperate with an outer thread provided integrally with the bottom surface 10. Alternatively or additionally, the inner thread is provided integrally with the tobacco stick 20.

[0065] Referring now to FIG. 6, a nozzle 74 according to a third embodiment of the present invention is illustrated. The nozzle 74 can be used in an aerosol generating system such as the aerosol generating system 2 of the first embodiment of the present invention.

[0066] In particular, similar to nozzle 54, nozzle 74 includes a substantially frustoconical outer surface 56, an end portion 58 with a longer diameter, an end portion 60 with a shorter diameter, a first axially extending portion 62 extending through the bottom surface 10, a second axially extending portion 64 extending through the first end portion 22 for penetrating the tobacco stick 20, a third axially extending portion 66, and a cylindrical inner through-hole 70.

[0067] Nozzle 74 differs from nozzle 54 in that it includes ribs 76 having an extending direction that forms a variable angle mainly with respect to the circumferential direction of the outer surface 56. Also, nozzle 74 does not include internal threads on the inner surface of the through-hole 70.

[0068] Here, referring to FIG. 7, a nozzle 78 according to a fourth embodiment of the present invention is illustrated. Nozzle 78 can be used in an aerosol generation system such as the aerosol generation system 2 of the first embodiment.

[0069] Similar to nozzles 54 and 74, nozzle 78 includes a substantially frustoconical outer surface 56, an end portion 58 with a longer diameter, an end portion 60 with a shorter diameter, a first axially extending portion 62 extending through the bottom surface 10, a second axially extending portion 64 extending through the first end portion 22 for penetrating the tobacco stick 20, and a third axially extending portion 66. Similar to nozzles 54 and 74, nozzle 78 further includes an inner through-hole 70 in which internal threads 72 are optionally provided.

[0070] As seen in FIG. 7, nozzle 78 includes external threads 80 provided over the length of the wall of the outer surface 56.

[0071] Here, referring to FIG. 8, an aerosol generation system 81 according to a fifth embodiment of the present invention is illustrated.

[0072] The aerosol generation system 81 includes an electronic unit 82 and a battery volume 83 provided inside the case 4. More specifically, the electronic unit 82 is provided under the oven cavity 6, and the battery volume 83 is provided on the side portion opposite to the side portion including the oven cavity 6.

[0073] In the fifth embodiment, the upstream air flow path 42 and the downstream air flow path 44 are indicated by line 84. As seen in FIG. 8, the upstream air flow path 42 extends continuously through the case 4 between the air inlet 46 provided on the side surface of the case 44 and the nozzle 41. The upstream air flow path 42 also includes a portion 85 proximate to the electronic unit 82.

[0074] With this arrangement, it is possible to use the air inlet to cool hot spots of the aerosol generation system 81, such as the electronic unit 82.

[0075] Here, referring to FIG. 9, an aerosol generation system 86 according to a sixth embodiment of the present invention is illustrated.

[0076] Similar to the aerosol generation system 81, the aerosol generation system 86 includes an electronic unit 82 and a battery volume 83. The aerosol generation system 86 is different from the aerosol generation system 81 mainly in that the air inlet 46 is provided on the bottom surface of the case 4. As a result, the upstream air flow path 42 includes a portion 87 proximate to the battery volume 83 in addition to the portion 85 proximate to the electronic unit 82.

[0077] Therefore, additional hot spots of the aerosol generation system 86 can be cooled by the air inlet.

[0078] Here, referring to FIG. 10, an aerosol generation system 88 according to a seventh embodiment of the present invention is illustrated.

[0079] The aerosol generation system 88 is different from the aerosol generation system 2 mainly in that the inner space of the outer cavity 14 located mainly under the bottom surface 10 includes a flavor receiving space 89. The user can add a flavor drop or a flavor tablet into the flavor receiving space 89 to add a flavor to the aerosol and create a further improved user experience.

[0080] Referring now to FIG. 11, an aerosol generating system 90 according to the eighth embodiment is illustrated.

[0081] The aerosol generating system 90 differs from the aerosol generating system 2 mainly in that the inner channel 32 of the acetate tube 24 includes a frustoconical recess 91. The frustoconical recess 91 includes an end 92 with a smaller diameter and an end 93 with a larger diameter. The end 92 with the smaller diameter is closer to the bottom surface 10 than the end 93 with the larger diameter. The nozzle 41 is inserted through the end 92 with the smaller diameter.

[0082] Referring now to FIG. 12, an aerosol generating system 94 according to the ninth embodiment of the present invention is illustrated.

[0083] The aerosol generating system 94 differs from the aerosol generating system 2 mainly in that the inner channel is formed by an array of perforations 95. Further, the aerosol generating system 94 includes a plurality of nozzles 41, for example one nozzle 41 for each perforation 95. In the illustrated embodiment, the perforations 95 extend from the second front surface 38 towards the first front surface 36. At approximately half the length of the acetate tube 24, the perforations 95 communicate with the inner channel 32.

[0084] Referring now to FIG. 13, a nozzle 96 according to the tenth embodiment is illustrated. The nozzle 96 can be used in any one of the aerosol generating systems 2, 81, 86, 88, 90, 94.

[0085] As seen in FIG. 13, the nozzle 96 is similar to the nozzle 74 of the third embodiment and includes in particular ribs 76 having an extending direction that forms a variable angle with respect to the circumferential direction of the outer surface 56. However, the shape of the outer surface 56 and the inner through hole 70 can be changed, for example, to replace the features of the nozzles 54 and 78.

[0086] The nozzle 96 includes a slide portion 97 that is inserted into the through hole 70. The slide portion 97 can move along the axial direction of the nozzle 96 inside the through hole 70. In the illustrated example, the slide portion 97 is a spherical ball having a diameter slightly smaller than the diameter of the axial cross section of the through hole 70.

[0087] The nozzle 96 further includes a coil spring 98. The coil spring 98 includes a lower end portion 99 attached to the nozzle 96 and an upper end portion 100 attached to the slide portion 97. The coil spring 98 is configured to function in a compressed state, that is, it functions by pushing the slide portion 97 in a direction extending from the lower end portion 58 with a longer diameter to the upper end portion 60 with a shorter diameter. With this arrangement, when the tobacco stick 20 is inserted into the oven cavity 6 and the nozzle 96 is properly inserted into the acetate tube 24, the slide portion 97 is pushed toward the lower end portion 99 and the coil spring 98 is compressed. When the tobacco stick 20 is removed, the slide portion 97 is no longer pushed by the tobacco stick 20 and returns to its rest position adjacent to the end portion 60 with a shorter diameter and further away from the lower end portion 99 than when it is pushed by the tobacco stick 20.

[0088] The nozzle 96 further includes a sensor 101. The sensor 101 can detect the position of the slide portion relative to the nozzle 96. More specifically, as shown in FIG. 13, the sensor 101 can detect whether the slide portion 97 is adjacent to the end portion 60 with a shorter diameter or is in the compressed position of the coil spring 98 close to the lower end portion 99 of the coil spring 98.

[0089] In this embodiment, the slide portion 97 is made of a ferromagnetic material, and the sensor 101 is a Hall effect sensor.

[0090] Here, referring to FIG. 14, an aerosol generation system 102 according to the 11th embodiment of the present invention is shown.

[0091] The aerosol generation system 102 differs from the aerosol generation system 2 in that the inner channel 32 includes a non-through hole 104 that extends from the first front surface 36 to the second front surface 38 of the acetate tube 24. The non-through hole 104 is in fluid communication with the opening 40 of the acetate tube 24.

[0092] Accordingly, the aerosol generation system 102 differs from the aerosol generation system 2 in that the hole that mainly forms the inner channel 32 does not extend over the length of the wall of the acetate tube 24 between the front surface 36 and the front surface 38. Such an arrangement makes it possible to further reduce the tobacco particles falling into the nozzle, thereby improving the uniformity of the pressure drop through the aerosol generation system 102.

[0093] Although all detailed embodiments have been described, these only serve to provide a better understanding of the invention as defined by the independent claims and should not be regarded as limiting the invention.

Claims

1. A case (4) defining an oven cavity (6), wherein the oven cavity (6) has a bottom surface (10) and an opening (12), A tobacco stick (20) that is at least partially received in the oven cavity (6), the tobacco stick (20) having a first end (22) facing the bottom surface (10), A first air passage (44) extending through the oven cavity (6) and the tobacco stick (20), The first air passage (44) has an inlet (50) that connects it to the outside of the oven cavity (6), The first air passage (44) has an outlet (52) that fluidly connects to the outside of the tobacco stick (20) It has, The inlet (50) is mounted on the bottom surface (10) of the oven cavity (6). Furthermore, it includes nozzles (41, 54, 74, 78, 96) extending through the first end (22), First air passage (44) and In an aerosol generating system (2, 81, 86, 88, 90, 94, 102) that includes, The tobacco stick (20) includes an acetate tube (24) adjacent to the first end (22), The acetate tube (24) includes an inner channel (32), and the first air passage (44) extends through the inner channel (32). Characterized by, Aerosol generation systems (2, 81, 86, 88, 90, 94, 102).

2. The acetate tube (24) is The first front surface (36) and The second front surface (38) and A cylindrical surface (34) extending between the first front surface (36) and the second front surface (38), An opening (40) extending between the cylindrical surface (34) and the inner channel (32) including, The aerosol generating system according to claim 1 (2, 81, 86, 88, 90, 94, 102).

3. The first front surface (36) is close to the bottom surface (10), The second front surface (38) is distal to the bottom surface (10), The inner channel (32) includes a blind bore (104) extending from the first front surface (36), The aerosol generating system (102) according to claim 2.

4. The aforementioned nozzles (41, 54, 74, 78, 96) The outer surface (54) is substantially frustoconical, A first axial portion (62) extending through the bottom surface (10), A second axial portion (64) extending through the first end (22) to penetrate the tobacco stick (20) and Includes, The first axial portion (62) is close to the longer diameter end (58) of the substantially frustoconical outer surface (54), The second axial portion (64) is close to the shorter diameter end (60) of the substantially frustoconical outer surface (54). The aerosol generating system according to claim 1 (2, 81, 86, 88, 90, 94, 102).

5. The substantially frustoconical outer surface (54) includes a plurality of circumferential ribs (68), The aerosol generating system according to claim 4 (2, 81, 86, 88, 90, 94, 102).

6. The substantially frustoconical outer surface (54) includes an external screw (80), The aerosol generating system according to claim 4 (2, 81, 86, 88, 90, 94, 102).

7. The nozzles (41, 54, 74, 78, 96) include a cylindrical through-hole (70) having a circular axial cross-section. The aerosol generating system according to claim 1 (2, 81, 86, 88, 90, 94, 102).

8. The cylindrical through hole (70) includes an internal thread (72), The aerosol generating system according to claim 7 (2, 81, 86, 88, 90, 94, 102).

9. The aforementioned tobacco stick (20) is The first end (22) has a second end (28) that is longitudinally opposite to it, The thicker portion (30) between the first end (22) and the second end (28) including, The aerosol generating system according to claim 1 (2, 81, 86, 88, 90, 94, 102).

10. The thicker portion (30) includes at least one layer of chip paper. The aerosol generating system according to claim 9 (2, 81, 86, 88, 90, 94, 102).

11. The thickness of the chip paper layer (30) is 0.02 mm to 0.2 mm. The aerosol generating system according to claim 7 (2, 81, 86, 88, 90, 94, 102).

12. The thicker portion (30) includes 1 to 10 layers of chip paper. The aerosol generating system according to claim 1 (2, 81, 86, 88, 90, 94, 102).

13. The inner channel (32) is A smaller diameter end (92) that is close to the bottom surface (10), The distal end (93) with a larger diameter relative to the bottom surface (10) Including a frustoconical recess (91) having, The aerosol generating system (90) according to claim 1.

14. The acetate tube (24) is An array of perforations (95) extending from a second front surface (38) distal to the bottom surface (10) toward a first front surface (36) adjacent to the bottom surface (10). including, The aerosol generating system (94) according to claim 1.

15. The nozzle (96) is A sliding portion (97) that can move along the longitudinal direction of the nozzle (96), A spring (98) is configured to move the sliding portion (97) in a direction extending from the bottom surface (10) toward the opening portion (12), A sensor (101) capable of detecting the position of the slide portion (97) and including, The aerosol generating system according to claim 1 (2, 81, 86, 88, 90, 94, 102).

16. The aforementioned slide portion (97) is ferromagnetic, The sensor (101) includes a Hall effect sensor. The aerosol generating system according to claim 15 (2, 81, 86, 88, 90, 94, 102).

17. The case (4) includes an outer cavity (14), The oven cavity (6) is located within the outer cavity (14), defining a radial gap (16) between the outer cavity (14) and the oven cavity (6). The aerosol generating system (2, 81, 86, 88, 90, 94, 102) includes an insulating layer (18) positioned radially outward of the oven cavity (4), The aerosol generating system according to claim 1 (2, 81, 86, 88, 90, 94, 102).

18. Further including the battery volume (83), The case (4) includes a second air passage (42) that extends continuously through the case (4), The second air passage (42) is in fluid communication with the inlet (52) of the first air passage (50), At least a portion (85, 87) of the second air passage (42) is in close proximity to the battery volume (83). The aerosol generating system (81, 86) according to claim 1.

19. Further including an electronic unit (82), The case (4) includes a second air passage (42) that extends continuously through the case (4), The second air passage (42) is in fluid communication with the inlet (52) of the first air passage (50), At least a portion (85, 87) of the second air passage (42) is in close proximity to the electronic unit (82). The aerosol generating system (81, 86) according to claim 1.

20. The flavor receiving space (89) adjacent to the bottom surface (10) is further included. an aerosol generating system (88) according to any one of claims 1 to 19.

Images