Aerosol-generating article and aerosol-generating system

Abstract

An aerosol-generating article (2) and an aerosol-generating system. The aerosol-generating article (2) comprises a filter section (21), a functional section (22), a substrate section (23), and a stop section (24) sequentially arranged in a first direction, the substrate section (23) being used to generate an aerosol. The aerosol-generating article (2) further comprises a wrapping layer (25), the wrapping layer (25) covering outer peripheries of the substrate section (23), the filter section (21), the functional section (22), and the stop section (24). The functional section (22) is provided with at least one central air passage (22a) and at least one side air passage (22c). The wrapping layer (25) is provided with a first through-hole (25a). The functional section (22) is provided with an air intake channel (22b). The air intake channel (22b) is in communication with the first through-hole (25a), the side air passage (22c), and the central air passage (22a). The air intake channel (22b) is used to guide a portion of an airflow from the first through-hole (25a) toward the central air passage (22a), and the side air passage (22c) is used to guide a portion of the airflow toward the substrate section (23). By means of the central air passage (22a) and the side air passage (22c), an external airflow extracts the aerosol generated by the substrate section (23), and when the airflow extracts the aerosol by means of the side air passage (22c), the distance between the airflow and the substrate section (23) is reduced, thereby improving the extraction efficiency of the aerosol by the airflow.

Description

An aerosol generating product and an aerosol generating system

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202423000002.9, filed on December 5, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of atomized aerosol technology, and in particular to an aerosol generating product and an aerosol generating system. Background Technology

[0004] Aerosol generating products generally produce aerosols through heating without combustion. Specifically, aerosol generating products use an external heat source to heat the aerosol generating matrix in the product to produce aerosols. The aerosol generating matrix does not burn, but instead loads an atomizing agent. When used, the atomizing agent is released by heating to form smoke.

[0005] In related technologies, when aerosols are extracted from the aerosol-generating matrix using the central airway during the suction process, the extraction efficiency is low. Furthermore, the aerosol-generating matrix shrinks and deforms after heating, making it prone to loosening or even falling off, thus affecting the user's suction experience. Summary of the Invention

[0006] In view of this, the embodiments of this application aim to provide an aerosol generating article and an aerosol generating system to improve the user's inhalation experience.

[0007] One embodiment of this application provides an aerosol generating article, including a filter segment, a functional segment, a substrate segment and a stop segment arranged sequentially along a first direction, wherein the substrate segment is used to generate aerosol;

[0008] The aerosol-generating article further includes a coating layer, which covers the outer periphery of the substrate section, the filter section, the functional section, and the stop section;

[0009] The functional segment is provided with at least one central air passage and at least one side air passage; the covering layer is provided with a first through hole, the functional segment is provided with an air intake channel, the air intake channel connects the first through hole, the side air passage and the central air passage, the air intake channel is used to guide a portion of the airflow from the first through hole to the central air passage, and the side air passage is used to guide a portion of the airflow to the substrate segment.

[0010] In some embodiments, the substrate segment, the filter segment, the functional segment, and the stop segment are cylinders with the same outer diameter and coaxially arranged.

[0011] In some implementations, the functional segment is provided with at least one groove that penetrates the end faces of opposite ends of the functional segment in the first direction and forms the side air passage.

[0012] In some embodiments, the cross-sectional shape of the aerosol-generating article is circular when projected onto a plane perpendicular to the first direction, and the groove has a radial dimension of 0.1 mm to 3 mm along the aerosol-generating article.

[0013] In some embodiments, the central airway forms a central hole on the end face of both ends of the functional segment along the first direction, and the circumference of the central hole is 10mm to 25mm.

[0014] In some embodiments, the distance between the end face of the filter segment away from the functional segment and the air intake channel in the first direction is 10mm to 30mm.

[0015] In some implementations, the flow area of ​​the air intake channel is reduced or remains unchanged along the direction in which the airflow flows from the outside through the air intake channel into the central air passage.

[0016] In some implementations, there are multiple air intake channels, which are arranged at circumferential intervals along the functional segment.

[0017] In some embodiments, the suction resistance of the filter section does not exceed 15 Pa / mm; and / or, the suction resistance of the stop section does not exceed 15 Pa / mm.

[0018] In some embodiments, the ratio of the dimension of the functional segment along the first direction to the dimension of the aerosol-generating article along the first direction is 30% to 60%.

[0019] This application provides an aerosol generation system according to a second embodiment, comprising:

[0020] An aerosol generating device having a receiving cavity;

[0021] And the aerosol-generating article as described in any of the above embodiments; at least a portion of the aerosol-generating article is contained in the receiving cavity;

[0022] The aerosol generating device includes a heating element for heating the substrate segment housed in the receiving cavity to generate aerosol.

[0023] The aerosol generation article and aerosol generation system of this application embodiment extract the aerosol generated by the substrate segment through the central air channel and the side air channels. When the airflow extracts the aerosol through the side air channels, the distance between the airflow and the substrate segment is close, which can improve the extraction efficiency of this part of the airflow. In addition, by retaining the central air channel, multiple airflow paths are formed to extract the aerosol generated by the substrate segment, which has high reliability and can reduce the possibility of complete blockage of the airflow path due to manufacturing errors of the aerosol generation article, thus reducing the manufacturing precision of the aerosol generation article. Furthermore, the functional segment and the stop segment are located at both ends of the substrate segment along the first direction. The stop segment can stop the substrate segment, and the stop segment, together with the functional segment, can constrain the substrate segment, which can effectively reduce the possibility of the substrate segment shrinking and deforming and falling off after heating. Attached Figure Description

[0024] Figure 1 is a schematic diagram of an aerosol generation system provided in an embodiment of this application;

[0025] Figure 2 is a schematic diagram of the structure of the unfolded coating layer of the aerosol-generated product in Figure 1.

[0026] Figure 3 is a cross-sectional schematic diagram of a functional segment of an aerosol generating article provided in an embodiment of this application;

[0027] Figure 4 is a cross-sectional schematic diagram of a functional segment of an aerosol generating article provided in an embodiment of this application. Detailed Implementation

[0028] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0029] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0031] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, references to terms such as "some embodiments," "examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] One embodiment of this application provides an aerosol generating article 2. Referring to FIG2, the aerosol generating article 2 includes a filter section 21, a functional section 22, a substrate section 23 and a stop section 24 arranged sequentially along a first direction.

[0034] It should be noted that the first direction refers to the direction indicated by the arrow in Figure 2.

[0035] The substrate segment 23 is used to generate aerosols. For example, the substrate segment 23 releases aerosols when heated.

[0036] The aerosol-generating article 2 also includes a coating layer 25, which covers the outer periphery of the substrate segment 23, the filter segment 21, the functional segment 22, and the stop segment 24. It is understood that the coating layer 25 serves to connect the substrate segment 23, the filter segment 21, the functional segment 22, and the stop segment 24, thereby improving the overall stability of the aerosol-generating article 2.

[0037] The material of the covering layer 25 is not limited. For example, the covering layer 25 includes, but is not limited to, one or more combinations of materials such as fiber paper, metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, PE (polyethylene), PBAT (butylene adipate-co-terephthalate).

[0038] Referring to Figure 2, functional segment 22 is provided with at least one central airway 22a and at least one side airway 22c. It can be understood that the central airway 22a and the side airway 22c are airways through which airflow can pass, allowing the airflow to flow along a predetermined path, facilitating user suction.

[0039] Referring to Figure 2, the covering layer 25 is provided with a first through hole 25a, and the functional section 22 is provided with an air intake channel 22b. The air intake channel 22b connects the first through hole 25a, the side air passage 22c and the central air passage 22a. The air intake channel 22b is used to guide a part of the airflow from the first through hole 25a to the central air passage 22a, and the side air passage 22c is used to guide a part of the airflow to the substrate section 23. Understandably, during the suction process, external airflow enters through the first through-hole 25a. Part of the airflow flows along the air inlet channel 22b to the central airway 22a and then along the central airway 22a to the filter section 21, creating a negative pressure on the side of the central airway 22a near the filter section 21 to extract the aerosol generated by the substrate section 23. Another part of the airflow flows along the air inlet channel 22b through the side airway 22c to the substrate section 23. Under the action of suction, the airflow extracts the aerosol generated by the substrate section 23 and then flows to the central airway 22a. Through these two parts of airflow, the aerosol generated by the substrate section 23 is delivered into the user's mouth through the filter section 21.

[0040] In related technologies, when aerosols are extracted from the aerosol-generating matrix using the central airway during the suction process, the extraction efficiency is low. Furthermore, the aerosol-generating matrix shrinks and deforms after heating, making it prone to loosening or even falling off, thus affecting the user's suction experience.

[0041] The aerosol generating article 2 provided in this application embodiment extracts the aerosol generated by the substrate segment 23 through the central airway 22a and the side airway 22c. When the airway extracts the aerosol through the side airway 22c, the distance between the airway and the substrate segment 23 is close, which can improve the extraction efficiency of this part of the airway for aerosols. In addition, by retaining the central airway 22a, multiple airflow paths are formed to extract the aerosol generated by the substrate segment 23, which has high reliability and can reduce the possibility of complete blockage of the airflow path due to manufacturing errors of the aerosol generating article 2, and can reduce the manufacturing precision requirements of the aerosol generating article 2.

[0042] Furthermore, in the aerosol generating article 2 provided in this application embodiment, the functional segment 22 and the stop segment 24 are located at both ends of the substrate segment 23 along the first direction. The stop segment 24 can stop the substrate segment 23. The stop segment 24, together with the functional segment 22, can constrain the substrate segment 23, which can better reduce the possibility of the substrate segment 23 shrinking and deforming and falling off after heating.

[0043] The specific structure of the substrate segment 23 is not limited here. Exemplarily, in one embodiment, the substrate segment 23 may be made of the atomizing medium itself, such as a smoky flavoring medium. In other embodiments, the substrate segment 23 may also include a matrix and an atomizing medium disposed on the matrix. The matrix may be, for example, high-temperature resistant carbon fiber. In this way, by providing a matrix, the strength of the substrate segment 23 can be improved, and it can withstand a certain degree of high temperature without producing odor.

[0044] The specific composition of the substrate segment 23 is not limited here. For example, in one embodiment, the substrate segment 23 may include plant ingredients, smoke-generating agent ingredients, etc.

[0045] The function of the smoke-generating agent is to produce a large amount of vapor upon heating, thereby increasing the amount of smoke in the smoke-generating product. In one embodiment, the smoke-generating agent may include, for example, one or more combinations of: a monohydric alcohol (such as menthol); a polyhydric alcohol (such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol); an ester of a polyhydric alcohol (such as glyceryl monoacetate, glyceryl diacetate, or glyceryl triacetate); a monocarboxylic acid; a polycarboxylic acid (such as lauric acid, myristic acid) or an aliphatic ester of a polycarboxylic acid (such as dimethyl dodecanoate, dimethyl tetradecanoate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl lauryl acetate, triacetin, meso-erythritol, a mixture of diacetins, diethyl caprylate, triethyl citrate, methyl benzoate, phenylacetic acid methyl ester, ethyl vanillate, glyceryl tributate, and lauryl acetate).

[0046] For example, the weight of the smoke-generating agent component in the substrate segment 23 accounts for no less than 10% of the total weight of the substrate segment 23. This ensures that the aerosol generated by the substrate segment 23 has a reasonable amount of smoke.

[0047] For example, the substrate segment 23 may be a filamentous structure, a sheet-like structure, a granular structure, or a monolithic structure.

[0048] In addition, the shape of the substrate segment 23 is not limited. For example, please refer to Figure 2. The substrate segment 23 can be columnar. The cross-sectional shape of the columnar substrate segment 23 can be circular or other shapes, such as polygons (including but not limited to triangles, squares, rhombuses, etc.), ellipses, racetracks, or irregular shapes. Irregular shapes refer to other symmetrical or asymmetrical shapes other than those listed above.

[0049] In some embodiments, referring to Figure 2, the substrate segment 23, filter segment 21, functional segment 22, and stop segment 24 are cylinders with the same outer diameter and coaxially arranged. This improves the uniformity of the contour of the aerosol-generating article 2 along the first direction, enhancing the cleanliness of the appearance of the aerosol-generating article 2. Furthermore, it facilitates better coverage of the substrate segment 23, filter segment 21, functional segment 22, and stop segment 24 by the coating layer 25, reducing the manufacturing difficulty of the aerosol-generating article 2.

[0050] It should be noted that in this embodiment, the first direction is the axial direction of the substrate segment 23, the filter segment 21, the functional segment 22, and the stop segment 24.

[0051] It should be noted that both the stop section 24 and the filter section 21 can be passed through by airflow. For example, during the suction process, the airflow passes through the stop section 24 and enters the substrate section 23. After the airflow extracts the aerosol generated by the substrate section 23, it enters the user's mouth through the functional section 22 and then through the filter section 21.

[0052] It should be noted that the specific formation method of the lateral airway 22c is not limited.

[0053] In some embodiments, referring to Figures 3 and 4, the functional segment 22 is provided with at least one groove 22c1, which penetrates the end faces of opposite ends of the functional segment 22 in a first direction and forms a side air passage 22c.

[0054] It should be noted that the groove 22c1 can be shielded by at least part of the functional segment 22, which can ensure the cleanliness of the appearance of the functional segment 22.

[0055] In some embodiments, referring to Figures 3 and 4, the cross-sectional shape of the aerosol generating article 2 is circular in the orthographic projection onto a plane perpendicular to the first direction. The radial dimension H of the groove 22c1 along the aerosol generating article 2 is 0.1mm to 3mm, i.e., 0.1mm ≤ H ≤ 3mm. For example, H can be 0.1mm, 0.2mm, 0.3mm, 0.5mm, 0.7mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, or 3.0mm. It is understood that the reasonable radial dimension of the groove 22c1 along the aerosol generating article 2 makes the dimension of the side air passage 22c reasonable, which is beneficial for the airflow to flow through the side air passage 22c to the substrate section 23, thereby improving the extraction efficiency of the aerosol generated by the airflow to the substrate section 23 and thus improving the user's suction experience.

[0056] It should be noted that the specific number of side airways 22c is not limited. For example, there are multiple side airways 22c, which are arranged at intervals along the circumference of the functional segment 22. This increases the flow rate of air through the side airways 22c to the substrate segment 23, which not only improves the extraction efficiency of aerosols generated by the airflow to the substrate segment 23, but also makes the aerosols entering the user's mouth more uniform, thereby improving the user's suction experience.

[0057] In some embodiments, a central air passage 22a has a central hole 22a1 formed on the end faces of both ends of the functional segment 22 along the first direction. The circumference of the central hole 22a1 is 10mm to 25mm, i.e., 10mm ≤ L ≤ 25mm. For example, L can be 10mm, 12mm, 15mm, 17mm, 19mm, 20mm, 22mm, or 25mm. It is understood that by limiting the circumference of the central hole 22a1, the airflow into and out of the central air passage 22a can be restricted, thereby making the airflow from the substrate segment 23 into the central air passage 22a and from the central air passage 22a into the filter segment 21 reasonable, which can improve the user's suction experience.

[0058] It should be noted that the specific shape of the central hole 22a1 is not limited. For example, it can be any shape such as circle, rectangle, serrated, pentagon, ellipse, or honeycomb.

[0059] In some embodiments, referring to Figure 1, the distance D between the end face of the filter section 21 away from the functional section 22 and the air intake channel 22b in the first direction is 10mm to 30mm, i.e., 10mm ≤ D ≤ 30mm. For example, D can be 10mm, 12mm, 15mm, 17mm, 19mm, 20mm, 22mm, 25mm, 27mm, or 30mm. It is understood that making the distance between the air intake channel 22b and the filter section 21 reasonable can improve the dilution effect of the airflow entering the central air passage 22a from the air intake channel 22b on the airflow in the central air passage 22a, thereby improving the cooling effect of the central air passage 22a on aerosols.

[0060] In some embodiments, referring to Figure 2, the flow area of ​​the air intake channel 22b is reduced or remains unchanged along the direction in which the airflow flows from the outside through the air intake channel 22b into the central air channel 22a. This is to ensure a reasonable pressure difference between the two ends of the air intake channel 22b, preventing excessive airflow from the first through hole 25a from entering the central air channel 22a through the air intake channel 22b. Instead, it allows as much airflow as possible to pass through the side air channel 22c through the substrate section 23 into the central air channel 22a, thereby improving the extraction effect of the airflow on the aerosol generated by the substrate section 23.

[0061] In some embodiments, there are multiple air intake channels 22b, which are arranged at circumferential intervals along the functional section 22. This facilitates the flow of air from the first through-hole 25a into the air intake channels 22b along the circumferential direction of the functional section 22, resulting in better uniformity of airflow from the air intake channels 22b into the central air passage 22a, thereby improving the cooling effect of the functional section 22 on aerosols.

[0062] In some embodiments, the suction resistance of the filter section 21 does not exceed 15 Pa / mm; and / or, the suction resistance of the stop section 24 does not exceed 15 Pa / mm. It is understood that the suction resistance of the filter section 21 and the stop section 24 is reasonable, so that the external airflow can pass smoothly through the filter section 21 and the stop section 24, reducing the difficulty of suction for the user and improving the suction experience of the aerosol generating article 2.

[0063] The above technical solutions include: first, the suction resistance of the filter section 21 does not exceed 15 Pa / mm; second, the suction resistance of the stop section 24 does not exceed 15 Pa / mm; third, the suction resistance of both the filter section 21 and the stop section 24 does not exceed 15 Pa / mm.

[0064] For example, the suction resistance of the filter section 21 is greater than that of the stop section 24. It is understood that the filter section 21 is closer to the user than the stop section 24, so the greater suction resistance of the stop section 24 can reduce the possibility of the user experiencing suction voids.

[0065] In some embodiments, referring to Figure 2, the ratio of the dimension E of the functional segment 22 along the first direction to the dimension F of the aerosol generating article 2 along the first direction is 30% to 60%. For example, the ratio of the dimension E of the functional segment 22 along the first direction to the dimension F of the aerosol generating article 2 along the first direction can be 30%, 40%, 50%, or 60%. This ensures that the dimension E of the functional segment 22 along the first direction is sufficient, allowing the airflow to be adequately cooled before entering the user's mouth.

[0066] One embodiment of this application provides an aerosol generation system. Referring to FIG1, the aerosol generation system includes an aerosol generation device 1 and an aerosol generation article 2 of any embodiment.

[0067] Referring to Figure 1, the aerosol generating apparatus 1 has a receiving cavity 1a, and at least a portion of the aerosol generating article 2 is contained in the receiving cavity 1a. It is understood that the receiving cavity 1a can provide sufficient space for the aerosol generating article 2. The aerosol generating article 2 can be entirely contained in the receiving cavity 1a, or it can be partially contained in the receiving cavity 1a while the other part is located outside the receiving cavity 1a.

[0068] The aerosol generating device provided in this application embodiment allows external gas entering the receiving cavity 1a to enter the aerosol generating product 2 through the first through hole 25a, while another part of the gas can enter the aerosol generating product 2 through the gap between the receiving cavity 1a and the aerosol generating product 2 via the stop section 24. This can improve the suction resistance when the user inhales and enhance the user's inhalation experience.

[0069] For example, the aerosol generating device 1 includes a housing 11, which can form the appearance of the aerosol generating device 1 and can also form a receiving cavity 1a. In addition, the housing 11 can also protect the internal components of the aerosol generating device 1.

[0070] The aerosol generating device 1 includes a heating element (not shown in the figure) for heating the substrate segment 23 housed in the receiving cavity 1a to generate an aerosol. It is understood that the heat generated by the heating element can heat and atomize the substrate segment 23, thereby generating an aerosol that can be inhaled by a user or used in medicine, beauty, etc.

[0071] There are various heating methods for the heating element. For example, heating methods include center heating and peripheral heating. Center heating refers to the heating element being inserted into the aerosol-generating product 2 to bake and heat the aerosol-generating product 2 from the inside out. Peripheral heating refers to the heating element being positioned around the aerosol-generating product 2 to bake and heat the aerosol-generating product 2 from the outside in. These heating methods can specifically include resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, etc.

[0072] As exemplarily, referring to FIG1, the aerosol generating apparatus 1 further includes a battery 12, which can supply power for operating the aerosol generating apparatus 1. For example, the battery 12 can supply power so that the heating element can heat the aerosol generating article 2.

[0073] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0074] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An aerosol-generating product, wherein, It includes a filter section, a functional section, a substrate section and a stop section arranged sequentially along a first direction, wherein the substrate section is used to generate aerosol; The aerosol-generating article further includes a coating layer, which covers the outer periphery of the substrate section, the filter section, the functional section, and the stop section; The functional segment is provided with at least one central air passage and at least one side air passage; the covering layer is provided with a first through hole, and the functional segment is provided with an air intake channel. The air intake channel connects the first through hole, the side air passage, and the central air passage. The air intake channel is used to guide a portion of the airflow from the first through hole to the central air passage, and the side air passage is used to guide a portion of the airflow to the substrate segment.

2. The aerosol-generating product according to claim 1, wherein, The substrate section, the filter section, the functional section, and the stop section are all cylinders with the same outer diameter and coaxially arranged.

3. The aerosol-generating product according to claim 2, wherein, The functional segment is provided with at least one groove, which penetrates the end faces of the functional segment at opposite ends in the first direction and forms the side air passage.

4. The aerosol-generating product according to claim 3, wherein, The cross-sectional shape of the aerosol-generating article is circular when projected onto a plane perpendicular to the first direction, and the groove has a radial dimension of 0.1 mm to 3 mm along the aerosol-generating article.

5. The aerosol-generating product according to claim 1, wherein, The central airway forms a central hole on the end face of both ends of the functional section along the first direction, and the circumference of the central hole is 10mm to 25mm.

6. The aerosol-generating product according to claim 1, wherein, The distance between the end face of the filter section away from the functional section and the air intake channel in the first direction is 10mm to 30mm.

7. The aerosol-generating article according to claim 6, wherein, Along the direction of airflow from the outside into the central air passage through the air intake passage, the flow area of ​​the air intake passage may decrease or remain unchanged.

8. An aerosol-generating article according to claim 6, wherein, The number of air intake channels is multiple, and the multiple air intake channels are arranged at circumferential intervals along the functional segment.

9. An aerosol-generating article according to claim 1, wherein, The suction resistance of the filter section does not exceed 15 Pa / mm; and / or, the suction resistance of the stop section does not exceed 15 Pa / mm.

10. An aerosol-generating article according to claim 1, wherein, The ratio of the dimension of the functional segment along the first direction to the dimension of the aerosol-generated article along the first direction is 30% to 60%.

11. An aerosol-generating system, wherein, include: An aerosol generating device having a receiving cavity; And the aerosol-generating article according to any one of claims 1-10; At least a portion of the aerosol-generated article is contained in the receiving cavity; The aerosol generating device includes a heating element for heating the substrate segment housed in the receiving cavity to generate aerosol.

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