Aerosol-generating substrate segment and aerosol-generating product

Abstract

Provided in the embodiments of the present application are an aerosol-generating substrate segment and an aerosol-generating product. The aerosol-generating substrate segment comprises a heating channel and a plurality of spaced dielectric walls, wherein the plurality of spaced dielectric walls are arranged at equal intervals on an outer side of the heating channel in the radial direction of the heating channel, such that a first gap for defining a first air passage is formed between every two adjacent spaced dielectric walls. The aerosol-generating substrate segment in the embodiments of the present application can improve inhalation experience.

Description

Aerosol generating substrate segment and aerosol generating article

[0001] Cross-reference to Related Applications

[0002] The present application is based on and claims priority to Chinese Patent Application No. 202410741197.8, filed on June 7, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of smoking articles, in particular to an aerosol generating substrate segment and an aerosol generating article. BACKGROUND

[0004] Generally, an aerosol generating article generates aerosol by heating without combustion. Specifically, an aerosol generating substrate segment is arranged in the aerosol generating article, and the aerosol generating article is heated by a heating element in an aerosol generating device, so that the aerosol generating substrate segment is just heated to a degree sufficient to release fragrance, but the aerosol generating substrate segment does not burn.

[0005] In related technologies, there is a heating method of inserting a heating element into the inside of an aerosol generating substrate segment to bake and heat the aerosol generating substrate segment from the inside to the outside. However, the aerosol generating article using this heating method has problems of uneven heating and poor smoking consistency, which affects the smoking experience of users. SUMMARY

[0006] Therefore, the embodiments of the present application aim to provide an aerosol generating substrate segment and an aerosol generating article capable of improving the smoking experience.

[0007] To achieve the above-mentioned purpose, the embodiments of the present application provide an aerosol generating substrate segment, which has a heating channel and a plurality of spacer medium walls. The plurality of spacer medium walls are arranged equidistantly along the radial direction of the heating channel on the outside of the heating channel, so as to form a first spacing space for defining a first air passage between two adjacent spacer medium walls.

[0008] In an embodiment, the spacer medium wall is annular, and the aerosol generating substrate segment further comprises a first plate-shaped medium wall connected to the two adjacent spacer medium walls, so as to define the first air passage in the first spacing space.

[0009] In an embodiment, a plurality of first plate-shaped medium walls are arranged between the two adjacent spacer medium walls, and the plurality of first plate-shaped medium walls are arranged equidistantly along the circumferential direction of the spacer medium wall, so as to define a plurality of first air passages in the first spacing space.

[0010] In one embodiment, the cross-sectional area of the first air passage between each two adjacent spacer walls increases in sequence from inside to outside along the radial direction.

[0011] In one embodiment, the number of the first plate-shaped walls between two adjacent spacer walls is 2-20; and / or,

[0012] The wall thickness of each first plate-shaped wall is 0.05-1 mm.

[0013] In one embodiment, the number of the spacer walls is 3-11; and / or,

[0014] The cross-sectional shape of each spacer wall is one of a circle, a polygon, an ellipse, a racetrack, and a special shape.

[0015] In one embodiment, among the plurality of spacer walls, the spacer wall located at the most inside along the radial direction encloses a space which is the heating passage.

[0016] In one embodiment, the number of the spacer walls is greater than two, wherein the number of the first plate-shaped walls in the first spacing space closest to the heating passage is less than the number of the first plate-shaped walls in each other first spacing space.

[0017] In one embodiment, the number of the first plate-shaped walls in each other first spacing space is the same and arranged in one-to-one alignment, and the first plate-shaped walls in the first spacing space closest to the heating passage are arranged in staggered alignment with the first plate-shaped walls in each other first spacing space.

[0018] In one embodiment, the aerosol generating substrate section comprises a second plate-shaped wall and a first annular wall enclosing the heating passage, the distance between the first annular wall and the spacer wall closest to the first annular wall is different from the distance between two adjacent spacer walls; the second plate-shaped wall is connected to the first annular wall and the spacer wall closest to the first annular wall, respectively, so as to define a second air passage between the first annular wall and the spacer wall closest to the first annular wall.

[0019] In one embodiment, the distance between the first annular wall and the spacer wall closest to the first annular wall is non-equidistant.

[0020] In one embodiment, the first annular medium wall is concentrically arranged with each of the spacer medium walls, and a cross-sectional shape of at least the spacer medium wall closest to the first annular medium wall is different from a cross-sectional shape of the first annular medium wall.

[0021] In one embodiment, the plurality of second plate-shaped medium walls are arranged in a plurality of numbers along a circumferential direction of the first annular medium wall to define a plurality of second air passages.

[0022] In one embodiment, the aerosol generating substrate section has at least two medium wall groups, each of the medium wall groups has at least three plate-shaped spacer medium walls, and the spacer medium walls of one of the medium wall groups intersect with the spacer medium walls of another of the medium wall groups to jointly define a plurality of first air passages.

[0023] In one embodiment, the number of the medium wall groups is two, and the spacer medium walls of the two medium wall groups are perpendicular to each other.

[0024] In one embodiment, the aerosol generating substrate section includes a second annular medium wall surrounding the heating passage;

[0025] The second annular medium wall is connected with the spacer medium wall closest to the first annular medium wall to define a plurality of third air passages; or,

[0026] The aerosol generating substrate section includes a plurality of third plate-shaped medium walls, and the plurality of third plate-shaped medium walls are arranged between the second annular medium wall and the spacer medium wall closest to the second annular medium wall to define a plurality of third air passages.

[0027] In one embodiment, each of the spacer medium walls has a wall thickness of 0.05mm to 1mm; and / or,

[0028] The heating passage has a pore size of 0.5mm to 7mm; and / or,

[0029] The heating passage has a cross-sectional shape selected from one of a circle, a polygon, an ellipse, a racetrack, and a special shape.

[0030] The present application also provides an aerosol generating article, which includes:

[0031] The aerosol generating substrate section as described above;

[0032] A functional section arranged at one end of the aerosol generating substrate along an extension direction of the heating passage, the functional section at least including a filter section for filtering aerosol;

[0033] an outer wrapper wrapped on the functional segment and an outer peripheral side of the aerosol generating substrate.

[0034] In one implementation, the functional segment further comprises at least one of a temperature reduction segment and a support segment arranged between the aerosol generating substrate segment and the filter segment.

[0035] In one implementation, the aerosol generating article further comprises a cleaning segment arranged at an end of the aerosol generating substrate away from the functional segment.

[0036] The aerosol generating substrate segment and the aerosol generating article provided by the embodiments of the present application can realize relatively uniform heat transfer during the heating process of the aerosol generating substrate segment by arranging a plurality of interval medium walls along the radial direction of the heating channel at the outer side of the heating channel, and ensure that the amount of aerosol released by each interval medium wall tends to be consistent. The first air passage defined between two adjacent interval medium walls can make the aerosol released by the corresponding interval medium wall flow smoothly and orderly through the first air passage, thereby improving the consistency of the aerosol extraction for each puff. The aerosol generating substrate segment of the embodiments of the present application not only meets the requirement of uniform heating, but also has good puff consistency, high aerosol extraction efficiency, and thus can improve the puffing experience. BRIEF DESCRIPTION OF DRAWINGS

[0037] FIG. 1 is a structural schematic diagram of an aerosol generating article according to an embodiment of the present application;

[0038] FIG. 2 is an exploded view of the aerosol generating article shown in FIG. 1;

[0039] FIG. 3 is a structural schematic diagram of an aerosol generating substrate segment shown in FIG. 2;

[0040] FIG. 4 is a structural schematic diagram of the aerosol generating substrate segment shown in FIG. 3 from another perspective;

[0041] FIG. 5 is a structural schematic diagram of a second aerosol generating substrate segment according to an embodiment of the present application;

[0042] FIG. 6 is a structural schematic diagram of a third aerosol generating substrate segment according to an embodiment of the present application;

[0043] FIG. 7 is a structural schematic diagram of a fourth aerosol generating substrate segment according to an embodiment of the present application;

[0044] FIG. 8 is a structural schematic diagram of a fifth aerosol generating substrate segment according to an embodiment of the present application;

[0045] FIG. 9 is a structural schematic diagram of the aerosol generating substrate segment shown in FIG. 8 from another perspective;

[0046] Fig. 10 is a schematic view of a structure of a sixth aerosol generating substrate segment according to an embodiment of the present application;

[0047] Fig. 11 is a schematic view of a relationship between the aerosol generating article shown in Fig. 1 and the aerosol generating device;

[0048] Fig. 12 is a cross-sectional view of the aerosol generating article shown in Fig. 11 and the aerosol generating device. DETAILED DESCRIPTION

[0049] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms such as "extending direction" is based on the orientation or positional relationship shown in Fig. 3. These orientation terms are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0050] The embodiments of the present application provide an aerosol generating substrate segment 11, please refer to Figs. 3 to 10, the aerosol generating substrate segment 11 has a heating channel 11a and a plurality of spacing medium walls 111, the plurality of spacing medium walls 111 are equidistantly arranged along the radial direction of the heating channel 11a outside the heating channel 11a, so as to form a first spacing space for separating at least two first air passages 11b between the two adjacent spacing medium walls 111.

[0051] Specifically, please refer to Figs. 11 and 12, after the aerosol generating substrate segment 11 is heated and atomized by the heating element 21 arranged in the aerosol generating device 20, the aerosol is released for the user to smoke or for medical, cosmetic, etc.

[0052] The specific structure of the aerosol generating substrate segment 11 is not limited here, for example, the aerosol generating substrate segment 11 can be made of the atomization medium itself, for example, made of a smoking flavor medium. In other embodiments, the aerosol generating substrate segment 11 can also include a substrate and an atomization medium arranged on the substrate, and the substrate can be, for example, a high-temperature-resistant carbon fiber. In this way, by arranging the substrate, the strength of the aerosol generating substrate segment 11 can be improved, and a certain degree of high temperature can be withstood without producing an odor.

[0053] The specific composition of the aerosol generating substrate segment 11 is not limited here, for example, in an embodiment, the aerosol generating substrate segment 11 can include plant ingredients, auxiliary ingredients, smoking agent ingredients, adhesive ingredients, etc.

[0054] In an embodiment, the plant component is one or more combinations of powders formed from crushed tobacco leaves, tobacco stems, tobacco dust, flavor plants, etc. The plant component is the core source of the product flavor. Endogenous substances in the plant component, such as nicotine, are aerosolized into the human bloodstream, prompting the pituitary gland to produce dopamine, which provides a physiological sense of satisfaction.

[0055] In an embodiment, the auxiliary component can be one or more combinations of inorganic fillers, lubricants, emulsifiers. The inorganic fillers include one or more combinations of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, diatomite. The inorganic fillers can provide support for the aerosol generating substrate segment 11 of the plant component, and the inorganic fillers also have micropores that can increase the porosity of the wall material after the plant component is formed, thereby increasing the aerosol release rate.

[0056] The lubricants include one or more combinations of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, palmitic acid, etc. The lubricants can increase the flowability of the particles, reduce the friction between the particles, make the overall density of the particle distribution more uniform, and reduce the pressure required for mold forming and the wear of the mold.

[0057] The emulsifiers include one or more combinations of polyglycerol fatty acid esters, Tween-80, polyvinyl alcohol, etc. The emulsifiers can slow down the loss of flavor substances during storage to some extent, increase the stability of the flavor substances, and improve the sensory quality of the product. The emulsifiers (also known as surfactants) can reduce the interfacial tension between water-soluble and water-insoluble components in the mixed system, and form a relatively strong film on the surface of the droplets or a double electric layer on the surface of the droplets due to the charges given by the emulsifiers, preventing the droplets from aggregating with each other and maintaining a uniform emulsion. The homogenization of two immiscible components can improve the consistency of the product quality.

[0058] The function of the smoking agent component is to generate a large amount of steam when heated, thereby increasing the amount of smoke of the smoking product. In an embodiment, the smoking agent can include one or more combinations of monohydric alcohols (such as menthol), polyhydric alcohols (such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol), esters of polyhydric alcohols (such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate), monocarboxylic acids, polybasic carboxylic acids (such as lauric acid, myristic acid), or fatty esters of polybasic carboxylic acids (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triactin, meso-erythritol, glycerol diacetate, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenyl acetate, ethyl vanillate, glycerol tributyrate, lauryl acetate), etc.

[0059] The function of the smoking agent component is to generate a large amount of steam when heated, thereby increasing the amount of smoke of the smoking product. In an embodiment, the smoking agent can include one or more combinations of monohydric alcohols (such as menthol), polyhydric alcohols (such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol), esters of polyhydric alcohols (such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate), monocarboxylic acids, polybasic carboxylic acids (such as lauric acid, myristic acid), or fatty esters of polybasic carboxylic acids (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triactin, meso-erythritol, glycerol diacetate, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenyl acetate, ethyl vanillate, glycerol tributyrate, lauryl acetate), etc.

[0060] In an embodiment, the adhesive component is a natural plant extract, a non-ionic modified viscous polysaccharide, including one or more combinations of tamarind polysaccharide, pullulan, fucoidan, locust bean gum, guar gum, xyloglucan. The adhesive is in close contact by wetting the interface with the component materials of the product, generating intermolecular attraction, thereby playing a role in bonding the powders, liquids, etc. of the component materials. At the same time, the use of natural plant extracts, non-ionic adhesives can avoid the release of harmful substances such as methanol, formaldehyde, propylene aldehyde, etc. caused by colloid modification, and improve the safety of the product.

[0061] In an embodiment, the aerosol generating substrate segment 11 can also have a light absorbing material, which is a material with high absorption of laser light, and can be better adapted to laser heating.

[0062] Exemplarily, the aerosol generating substrate segment 11 can be a granule combination, which is a reconstituted tobacco medium, for example, a reconstituted tobacco medium containing components such as smoke generating agents and tobacco. The aerosol generating substrate segment 11 is a one-piece structure, for example, a one-piece structure formed by injection molding, compression molding or extrusion process. Among them, extrusion molding refers to a processing method in which the raw material mixture is added to the extruder, the material is pushed forward by the screw through the action between the extruder barrel and the screw, and various cross-section products or semi-products are continuously formed through the machine head. The aerosol substrate formed by extrusion molding is in the form of a strip.

[0063] Since the aerosol generating substrate segment 11 is a granule combination, it is a one-piece medium after being heated for smoking or stopping heating, and is not easy to disintegrate and fall off, solving the problems of the existing art, such as the disintegration of thin sheets, the disintegration of silk-like components, the disintegration of granular components, and the difficulty in cleaning of the thin sheet, silk-like or scattered granular aerosol generating substrate segment 11.

[0064] The shape of the aerosol generating substrate segment 11 is not limited, and exemplarily, the aerosol generating substrate segment 11 can be columnar. The cross-sectional shape of the columnar aerosol generating substrate segment 11 can be circular, polygonal (including but not limited to triangular, square, prismatic, etc.), elliptical, racetrack-shaped, irregular, etc., wherein the irregular shape refers to other symmetrical or asymmetrical shapes other than the shapes listed above.

[0065] Please refer to FIG. 8 and FIG. 12, the heating channel 11a is a channel for inserting the heating element 21 in the aerosol generating device 20 into the aerosol generating substrate segment 11, that is, the heating element 21 is inserted into the heating channel 11a to bake and heat the aerosol generating substrate segment 11 from the inside to the outside. This heating method is generally referred to as center heating. The specific way of center heating can be resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, etc., which is not specifically limited here.

[0066] The heating element 21 can be directly attached to the inner wall surface of the heating channel 11a, or a gap can be formed between the heating element 21 and the inner wall surface of the heating channel 11a.

[0067] The direct attachment has the advantage of reducing heat loss in the heat transfer process. In addition, some aerosol generating devices 20 directly use the heating element 21 to measure the temperature during use. Therefore, the direct attachment of the heating element 21 to the inner wall surface of the heating channel 11a can improve the accuracy of temperature measurement.

[0068] The gap between the heating element 21 and the inner wall surface of the heating channel 11a has the advantage of avoiding the inner wall surface of the heating channel 11a being attached to the heating element 21 to cause the aerosol generating substrate segment 11 to be burnt. In addition, the heating channel 11a with the gap can improve the extraction amount of aerosol and increase the utilization rate of aerosol.

[0069] The size of the gap between the heating element 21 and the inner wall surface of the heating channel 11a can be designed as needed. However, when the size of the gap is less than 0.03 mm, the inner wall surface of the heating channel 11a is too close to the heating element 21, which can also cause the aerosol generating substrate segment 11 to be burnt. When the size of the gap is greater than 0.5 mm, the resistance in the heat transfer process is large, and the thermal efficiency is reduced. Therefore, preferably, the size of the gap can be 0.03 mm to 0.5 mm (including the end point value), for example, the size of the gap can be 0.03 mm, 0.05 mm, 0.08 mm, 0.1 mm, 0.5 mm, 1 mm, 1.5 mm, etc. More preferably, the size of the gap can be 0.08 mm to 1.5 mm (including the end point value).

[0070] The shape of the cross section of the heating channel 11a can be circular, polygonal (including but not limited to triangular, square, prismatic, etc.), elliptical, racetrack-shaped, special-shaped, etc. as long as the heating element 21 can be inserted into the heating channel 11a. However, since the cross section of the heating element 21 is generally circular, when the shape of the cross section of the heating channel 11a is polygonal, elliptical, racetrack-shaped, special-shaped, etc. non-circular, it is more convenient to form a gap between the heating element 21 and the inner wall surface of the heating channel 11a.

[0071] The pore size of the heating channel 11a can be designed as required, but when the pore size of the heating channel 11a is less than 0.5 mm, the heating area of the inner wall surface of the heating channel 11a is small, the preheating time is long, and the user's smoking experience is reduced. When the pore size of the heating channel 11a is greater than 7 mm, the overall mass of the aerosol generating substrate segment 11 is lighter, and the amount of aerosol released by the aerosol generating substrate segment 11 is lower, which is not conducive to user smoking. Therefore, preferably, the pore size of the heating channel 11a can be 0.5 mm to 7 mm (including the end point value), for example, the pore size of the heating channel 11a can be 0.5 mm, 1 mm, 1.2 mm, 2 mm, 3 mm, 3.5 mm, 5 mm, 7 mm, etc. More preferably, the pore size of the heating channel 11a can be 1 mm to 3.5 mm (including the end point value), and more preferably, the pore size of the heating channel 11a can be 1.2 mm to 3 mm (including the end point value).

[0072] It should be noted that the pore size refers to the size used to calculate the cross-sectional area of the heating channel 11a. When the shape of the cross section of the heating channel 11a is circular, the pore size refers to the diameter of the cross section. When the shape of the cross section of the heating channel 11a is non-circular, there are generally multiple sizes for calculating the cross-sectional area, and the pore size refers to the largest size.

[0073] Please refer to FIGS. 3 and 4, the plurality of spacing medium walls 111 are arranged equidistantly along the radial direction of the heating channel 11a on the outside of the heating channel 11a, which means that the spacing medium walls 111 are arranged on the outside of the radial direction of the heating channel 11a, and the plurality of spacing medium walls 111 are arranged equidistantly along the radial direction of the heating channel 11a, and the distance D1 between any two adjacent spacing medium walls 111 is equal.

[0074] It should be noted that the radial direction of the heating channel 11a refers to the direction perpendicular to the extension direction of the heating channel 11a, and the term radial direction does not limit the shape of the cross section of the heating channel 11a to be circular.

[0075] The wall thickness of the spacing medium wall 111 can be designed as required, but when the wall thickness of the spacing medium wall 111 is less than 0.05 mm, the strength of the spacing medium wall 111 is low, and the loss during processing is large, and when the wall thickness of the spacing medium wall 111 is greater than 1 mm, the aerosol in the spacing medium wall 111 is not conducive to release, thereby reducing the utilization rate of the aerosol generating substrate segment 11. Therefore, preferably, the wall thickness of each spacing medium wall 111 can be 0.05 mm to 1 mm (including the end point value), for example, the wall thickness of each spacing medium wall 111 can be 0.05 mm, 0.1 mm, 0.3 mm, 0.5 mm, 0.8 mm, 1 mm, etc. More preferably, the wall thickness of each spacing medium wall 111 can be 0.1 mm to 0.5 mm (including the end point value).

[0076] Please continue to refer to FIG. 3 and FIG. 4, the first air passage 11b is used to collect the aerosol released by the heated aerosol generating substrate segment 11, and make the aerosol flow along the first air passage 11b.

[0077] The plurality of spacer medium walls 111 are arranged along the radial direction of the heating channel 11a, and each of the first spacing spaces is formed between two adjacent spacer medium walls 111, and each of the first spacing spaces is used to define at least one first air passage 11b, that is, each first air passage 11b is part of the corresponding first spacing space.

[0078] The aerosol generating article 10 provided by the embodiments of the present application also includes a functional segment 12, an outer wrapping layer 13, and the aerosol generating substrate segment 11 provided by any of the embodiments of the present application. The functional segment 12 is arranged at one end of the aerosol generating substrate along the extension direction of the heating channel 11a, and the functional segment 12 at least includes a filter segment 121 for filtering the aerosol. The outer wrapping layer 13 wraps the functional segment 12 and the outer circumferential side of the aerosol generating substrate.

[0079] The filter segment 121 is used to contact the user's oral cavity when the user smokes, so as to filter the aerosol.

[0080] The material of the filter segment 121 includes but is not limited to one or more combinations of PE (polyethylene), PLA (Polylactic acid, also known as Polylactide), PBAT (butyleneadipate-co-terephthalate), PP (Polypropylene), acetate fiber, and propylene fiber material.

[0081] It should be noted that the aerosol generating article 10 generates aerosol by means of the aerosol generating substrate segment 11, and the functional segment 12 does not generate aerosol.

[0082] The functional segment 12 shown in FIG. 2 further includes a cooling segment 122 and a support segment 123, and the cooling segment 122 and the support segment 123 are located between the aerosol generating substrate segment 11 and the filter segment 121.

[0083] The cooling segment 122 is used to cool the aerosol before the filter segment 121 filters the aerosol, so as to reduce the temperature of the aerosol and improve the "burning mouth" phenomenon when the user smokes the aerosol.

[0084] The material of the cooling segment 122 includes but is not limited to one or more combinations of PE, PLA, PBAT, PP, acetate fiber, and propylene fiber material.

[0085] The material of the cooling segment 122 and the filtering segment 121 can be the same or different.

[0086] The support segment 123 is mainly used to provide support for the functional segment 12 to improve the structural strength of the functional segment 12, especially at high temperatures.

[0087] Exemplarily, the support segment 123 can have good structural strength at a high temperature of at least 200°C.

[0088] In some scenarios, the support segment 123 can also provide a certain suction resistance.

[0089] The material of the support segment 123 includes but is not limited to acetate fiber, PET (polyethylene terephthalate), plant fiber, non-plant fiber, etc.

[0090] The support segment 123 can be arranged between the cooling segment 122 and the aerosol generating substrate segment 11, or arranged between the cooling segment 122 and the filtering segment 121.

[0091] In other embodiments, the functional segment 12 can only be provided with the cooling segment 122 without the support segment 123, or only provided with the support segment 123 without the cooling segment 122, or neither the cooling segment 122 nor the support segment 123.

[0092] The material of the outer wrapping layer 13 is not limited, for example, including but not limited to one or more combinations of fiber paper, metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, PE, PBAT, etc.

[0093] The outer wrapping layer 13 can have multiple layers, for example, referring to FIGS. 1 and 2, the outer wrapping layer 13 can include a first wrapping layer 131, a second wrapping layer 132, and a third wrapping layer 133, the first wrapping layer 131 wrapping the aerosol generating substrate segment 11, the second wrapping layer 132 wrapping the aerosol generating substrate segment 11, the cooling segment 122, and the support segment 123, and the third wrapping layer 133 wrapping the filtering segment 121 and part of the cooling segment 122.

[0094] In other embodiments, the outer wrapping layer 13 can also have only one layer.

[0095] Referring to FIGS. 2 and 12, in some embodiments, the aerosol generating article 10 can also be provided with a cleaning segment 14 arranged at the end of the aerosol generating substrate away from the functional segment 12 to prevent the aerosol generating substrate segment 11 from shrinking and falling off after being heated, and to prevent the adsorption of backflow aerosol.

[0096] It should be noted that the aerosol generating substrate segment 11 of the embodiments of the present application is not limited to being used in the aerosol generating article 10 configured with the functional segment 12. In some embodiments, the aerosol generating article 10 can be free of the functional segment 12 (the end of the aerosol generating substrate segment 11 away from the functional segment 12 can also be free of the cleaning segment 14 and the like), for example, the aerosol generating device 20 can be provided with a mouthpiece which can be reusable or disposable, and the mouthpiece is used in cooperation with the aerosol generating article 10 free of the functional segment 12 to replace the functional segment 12.

[0097] The aerosol generating substrate segment 11 of the embodiments of the present application can achieve relatively uniform heat transfer during heating by being provided with a plurality of interval medium walls 111 arranged equidistantly along the radial direction of the heating channel 11a outside the heating channel 11a, so as to ensure that the amount of aerosol released by each interval medium wall 111 tends to be consistent, and the first air passage 11b defined between two adjacent interval medium walls 111 can make the aerosol released by the corresponding interval medium wall 111 flow smoothly and orderly through the first air passage 11b, thereby improving the consistency of puff-by-puff aerosol extraction. The aerosol generating substrate segment 11 of the embodiments of the present application not only meets the requirement of uniform heating, but also has good puffing consistency, high aerosol extraction efficiency, and thus can improve the puffing experience.

[0098] In an embodiment, referring to FIGS. 3 to 7, the interval medium wall 111 can be annular, and the aerosol generating substrate segment 11 further comprises a first plate-shaped medium wall 112 connected to two adjacent interval medium walls 111 so as to define the first air passage 11b in the first interval space.

[0099] Specifically, the cross section of the annular interval medium wall 111 is ring-shaped, and the specific shape of the ring is not limited, for example, the cross section of each interval medium wall 111 can be circular, polygonal (including but not limited to triangular, square, prismatic, etc.), elliptical, racetrack-shaped, irregular, etc.

[0100] In order to meet the requirement of arranging along the radial direction of the heating channel 11a at equal intervals, the number of the annular spacer medium wall 111 is at least 3, and in addition, the specific number of the annular spacer medium wall 111 is not limited, but when the number of the spacer medium wall 111 is greater than 11, the overall weight of the aerosol generating substrate section 11 is too high, the required heating time is longer, and at the same time, under the condition that the cross-sectional size of the aerosol generating substrate section 11 is basically kept unchanged, the cross-sectional size of the first air channel 11b will be smaller, which is not conducive to the extraction of aerosol, and thus may cause the user's smoking experience to decrease. Therefore, preferably, the number of the annular spacer medium wall 111 can be 3-11 (including the end point value), for example, the number of the annular spacer medium wall 111 can be 3, 5, 8, 10, 11, etc., and more preferably, the number of the annular spacer medium wall 111 can be 3-8 (including the end point value).

[0101] The first plate-shaped medium wall 112 is a plate-shaped medium wall, which can be a straight plate or a curved plate.

[0102] The wall thickness of the first plate-shaped medium wall 112 can be designed as needed, but when the wall thickness of the first plate-shaped medium wall 112 is less than 0.05 mm, the strength of the first plate-shaped medium wall 112 is low, and the loss in the processing process is large, and when the wall thickness of the first plate-shaped medium wall 112 is greater than 1 mm, it is not conducive to the release of aerosol in the first plate-shaped medium wall 112, thereby causing the utilization rate of the aerosol generating substrate section 11 to be low, therefore, preferably, the wall thickness of each first plate-shaped medium wall 112 can be 0.05-1 mm (including the end point value), for example, the wall thickness of each first plate-shaped medium wall 112 can be 0.05 mm, 0.1 mm, 0.3 mm, 0.5 mm, 0.8 mm, 1 mm, etc., and more preferably, the wall thickness of each first plate-shaped medium wall 112 can be 0.1-0.5 mm (including the end point value).

[0103] The aerosol generating substrate section 11 shown in FIGS. 3-7 is provided with a plurality of first plate-shaped medium walls 112 between adjacent two spacer medium walls 111, and the plurality of first plate-shaped medium walls 112 are arranged at intervals along the circumferential direction of the spacer medium wall 111, so as to define a plurality of first air channels 11b in the first spacing space, that is, the space between adjacent two first plate-shaped medium walls 112 is a first air channel 11b.

[0104] The number of the first plate-shaped medium walls 112 between the two adjacent interval medium walls 111 is not limited, but when the number of the first plate-shaped medium walls 112 is greater than 20, the overall weight of the aerosol generating substrate segment 11 is too high, the required heating time is too long, the cross-sectional size of the first air channel 11b is too small, which is not conducive to the extraction of aerosol, and thus may cause the user's smoking experience to decrease. Therefore, preferably, the number of the first plate-shaped medium walls 112 between the two adjacent interval medium walls 111 can be 2-20 (including the end values), for example, the number of the first plate-shaped medium walls 112 can be 2, 3, 5, 8, 10, 15, 20, etc., and more preferably, the number of the first plate-shaped medium walls 112 can be 3-15 (including the end values).

[0105] In other embodiments, only one first plate-shaped medium wall 112 can be arranged between the two adjacent interval medium walls 111, which is equivalent to only one first air channel 11b between the two adjacent interval medium walls 111.

[0106] The opposite sides of the first plate-shaped medium wall 112 are connected with the two adjacent interval medium walls 111, which not only can support the two adjacent interval medium walls 111, but also can conduct heat with the interval medium walls 111, in addition, by arranging interval medium walls 111 and first plate-shaped medium walls 112 with different lengths, the rate of heat transfer can be easily controlled.

[0107] Further, referring to FIGS. 3-7, the cross-sectional area of the first air channel 11b between each two adjacent interval medium walls 111 can increase in turn from the inside to the outside along the radial direction.

[0108] “Inside” refers to the side close to the heating channel 11a, and “outside” refers to the side away from the heating channel 11a, that is, along the radial direction of the heating channel 11a, the farther away from the heating channel 11a, the larger the cross-sectional area of the first air channel 11b.

[0109] Specifically, although the plurality of interval medium walls 111 are arranged at equal intervals along the radial direction of the heating channel 11a, the number of the first plate-shaped medium walls 112 between each two adjacent interval medium walls 111 can be controlled to control the cross-sectional area of the first air channel 11b, for example, the number of the first plate-shaped medium walls 112 between each two adjacent interval medium walls 111 can be consistent, or the number of the first plate-shaped medium walls 112 between each two adjacent interval medium walls 111 can decrease in turn from the inside to the outside along the radial direction, thereby the cross-sectional area of the first air channel 11b between each two adjacent interval medium walls 111 can increase in turn from the inside to the outside along the radial direction.

[0110] During the suction process, the smaller the cross-sectional area of the first air passage 11b, the greater the flow resistance of the airflow, and therefore, the cross-sectional area of the first air passage 11b between each adjacent two interval medium walls 111 increases radially from inside to outside in turn, which can enable the airflow to preferentially extract aerosol from the first air passage 11b with a larger cross-sectional area, thereby changing the fluid distribution of the aerosol generating substrate section 11 during the heating process, improving the aerosol extraction effect of the interval medium wall 111 relatively far from the heating channel 11a, and thereby further improving the uniformity of aerosol release and the utilization rate of the aerosol generating substrate section 11.

[0111] In an embodiment, referring to FIGS. 3-5, among the plurality of interval medium walls 111, the space surrounded by the radially innermost interval medium wall 111 is the heating channel 11a. That is, the heating channel 11a can be directly defined by the radially innermost interval medium wall 111 without the need for other medium walls to define the heating channel 11a, which can facilitate the processing and manufacturing of the aerosol generating substrate section 11.

[0112] Referring to FIGS. 3 and 4, for the aerosol generating substrate section 11 with a number of interval medium walls 111 greater than two, the number of first plate-shaped medium walls 112 in the first interval space closest to the heating channel 11a can be less than the number of first plate-shaped medium walls 112 in each of the other first interval spaces.

[0113] That is, the number of first plate-shaped medium walls 112 in the first interval space closest to the heating channel 11a is the least. Since the area of the first interval space closest to the heating channel 11a is relatively small, setting a relatively small number of first plate-shaped medium walls 112 can better ensure that the cross-sectional area of the first air passage 11b closest to the heating channel 11a will not be too small to affect the aerosol extraction effect.

[0114] For example, referring to FIGS. 3 and 4, the number of first plate-shaped medium walls 112 in each of the other first interval spaces can be the same and arranged in one-to-one alignment, that is, in addition to the first plate-shaped medium walls 112 in the first interval space closest to the heating channel 11a, the first plate-shaped medium walls 112 in each of the other first interval spaces can be aligned one-to-one to form a whole radial shape.

[0115] Referring to FIGS. 3 and 4, the first plate-shaped medium walls 112 in the first interval space closest to the heating channel 11a can be staggered and aligned with the first plate-shaped medium walls 112 in the other first interval spaces.

[0116] The staggered alignment arrangement refers to that the first plate-shaped medium wall 112 in the first interval space closest to the heating channel 11a is aligned with the first plate-shaped medium wall 112 in other first interval spaces in a manner of alignment, staggering, alignment, staggering. For example, referring to FIG. 4, eight first plate-shaped medium walls 112 are arranged in the first interval space closest to the heating channel 11a, and sixteen first plate-shaped medium walls 112 are arranged in each of the other two first interval spaces. The first plate-shaped medium walls 112 in the other two first interval spaces are aligned one by one to form sixteen groups of aligned first plate-shaped medium walls 112. Among the sixteen groups of aligned first plate-shaped medium walls 112, only eight groups of first plate-shaped medium walls 112 are aligned one by one with the eight first plate-shaped medium walls 112 closest to the heating channel 11a, and there is one group of first plate-shaped medium walls 112 between the two groups of first plate-shaped medium walls 112 aligned one by one with the eight first plate-shaped medium walls 112, and none of the eight first plate-shaped medium walls 112 is aligned with the one group of first plate-shaped medium walls 112.

[0117] It should be noted that the number of first plate-shaped medium walls 112 in each first interval space can be adjusted according to design needs. In addition, among the multiple groups of first plate-shaped medium walls 112 formed by the first plate-shaped medium walls 112 in the other first interval spaces aligned one by one, the number of groups arranged in a manner of alignment, staggering, alignment, staggering can also be adjusted according to design needs. For example, it can be that two or more consecutive groups of first plate-shaped medium walls 112 are aligned with the first plate-shaped medium walls 112 closest to the heating channel 11a, or it can be that two or more consecutive groups of first plate-shaped medium walls 112 are staggered with the first plate-shaped medium walls 112 closest to the heating channel 11a.

[0118] The staggered alignment arrangement of the first plate-shaped medium wall 112 in the first interval space closest to the heating channel 11a and the first plate-shaped medium wall 112 in the other first interval space can not only better ensure that the cross-sectional area of the first air channel 11b closest to the heating channel 11a is not too small, but also can achieve more uniform heat transfer during the heating process of the aerosol generating substrate section 11. In another embodiment, referring to FIGS. 6 and 7, the aerosol generating substrate section 11 can be provided with a second plate-shaped medium wall 113 and a first annular medium wall 114. The first annular medium wall 114 surrounds the heating channel 11a, and the distance between the first annular medium wall 114 and the interval medium wall 111 closest to the first annular medium wall 114 is different from the distance between adjacent two interval medium walls 111. The second plate-shaped medium wall 113 is connected with the first annular medium wall 114 and the interval medium wall 111 closest to the first annular medium wall 114, respectively, so as to define a second air channel 11c between the first annular medium wall 114 and the interval medium wall 111 closest to the first annular medium wall 114.

[0119] The first annular dielectric wall 114 is an annular dielectric wall.

[0120] As shown in FIG. 6, the distance between the first annular dielectric wall 114 and the dielectric wall 111 closest to the first annular dielectric wall 114 is different from the distance between two adjacent dielectric walls 111. For example, the distance D2 between the first annular dielectric wall 114 and the dielectric wall 111 closest to the first annular dielectric wall 114 can be smaller than the distance D1 between two adjacent dielectric walls 111, or the distance D2 between the first annular dielectric wall 114 and the dielectric wall 111 closest to the first annular dielectric wall 114 can be larger than the distance D1 between two adjacent dielectric walls 111. In other words, the first annular dielectric wall 114 can be arranged separately from the dielectric walls 111 to define the heating channel 11a.

[0121] As shown in FIG. 6 and FIG. 7, the distance D2 between the first annular dielectric wall 114 and the dielectric wall 111 closest to the first annular dielectric wall 114 can be non-constant, i.e., D2 is not a constant value but a range of values.

[0122] For example, as shown in FIG. 6 and FIG. 7, the first annular dielectric wall 114 can be concentric with the dielectric walls 111, i.e., the axial center line of the first annular dielectric wall 114 coincides with the axial center line of the dielectric walls 111. Meanwhile, the cross-sectional shape of at least the dielectric wall 111 closest to the first annular dielectric wall 114 is different from the cross-sectional shape of the first annular dielectric wall 114, i.e., the cross-sectional shape of the dielectric walls 111 other than the dielectric wall 111 closest to the first annular dielectric wall 114 can be the same as or different from the cross-sectional shape of the first annular dielectric wall 114.

[0123] In other embodiments, the cross-sectional shape of at least the dielectric wall 111 closest to the first annular dielectric wall 114 can be the same as the cross-sectional shape of the first annular dielectric wall 114.

[0124] The second plate-shaped dielectric wall 113 is a plate-shaped dielectric wall. The second plate-shaped dielectric wall 113 can be a straight plate or a curved plate. The shape of the second plate-shaped dielectric wall 113 can be the same as or different from the shape of the first plate-shaped dielectric wall 112.

[0125] The aerosol generating substrate segment 11 shown in FIGS. 6 and 7 is provided with a plurality of second plate-shaped medium walls 113, which are arranged along the circumference of the first annular medium wall 114 at intervals to define a plurality of second air passages 11c, that is, the space between two adjacent second plate-shaped medium walls 113 is a second air passage 11c.

[0126] The number of second plate-shaped medium walls 113 is not limited, but similar to the first plate-shaped medium walls 112, when the number of second plate-shaped medium walls 113 is greater than 20, the overall weight of the aerosol generating substrate segment 11 will also increase, the heating time will be longer, and the extraction of aerosol will be adversely affected. Therefore, preferably, the number of second plate-shaped medium walls 113 can be 2-20 (including end values), for example, the number of second plate-shaped medium walls 113 can be 2, 3, 5, 8, 10, 15, 20, etc., and more preferably, the number of second plate-shaped medium walls 113 can be 3-15 (including end values).

[0127] In other embodiments, only one second plate-shaped medium wall 113 can be arranged between the first annular medium wall 114 and the interval medium wall 111 closest to the first annular medium wall 114, which is equivalent to there being only one second air passage 11c between the first annular medium wall 114 and the interval medium wall 111 closest to the first annular medium wall 114.

[0128] By arranging the first annular medium wall 114 to enclose the heating passage 11a, it is convenient to process a heating passage 11a that meets various requirements according to design needs, especially to process a heating passage 11a that forms a gap with the heating element 21.

[0129] It should be noted that the interval medium wall 111 is not limited to being annular, for example, in an embodiment, referring to FIGS. 8-10, the aerosol generating substrate segment 11 can have at least two medium wall groups 111A, each medium wall group 111A having at least three plate-shaped interval medium walls 111, and the interval medium walls 111 of one medium wall group 111A intersect with the interval medium walls 111 of another medium wall group 111A to jointly define a plurality of first air passages 11b.

[0130] That is, the interval medium wall 111 can also have a similar structure to the first plate-shaped medium wall 112, and the interval medium wall 111 can be a straight plate or a curved plate.

[0131] It should be noted that each of the medium wall groups 111A in FIGS. 8-10 shows three spaced medium walls 111, and it can be understood that other medium walls parallel to the three shown spaced medium walls 111 and shown or described in FIGS. 8-10 are also spaced medium walls 111 in the same medium wall group 111A.

[0132] The spaced medium walls 111 of one medium wall group 111A intersect with the spaced medium walls 111 of another medium wall group 111A, so that all the spaced medium walls 111 together form a grid structure, and the space in each grid in the grid structure is a first air passage 11b, which means that the same first air passage 11b is part of the first spaced space in one medium wall group 111A and part of the first spaced space in another medium wall group 111A.

[0133] The grid structure not only improves the structural strength of the aerosol generating substrate section 11, but also improves the heat transfer rate during heating and the uniformity of the aerosol airflow, reduces the waiting time of the user during smoking, and further improves the user's smoking experience.

[0134] The aerosol generating substrate section 11 shown in FIGS. 8-10 is provided with two medium wall groups 111A, which not only facilitate the definition of multiple first air passages 11b, but also facilitate the control of the cross-sectional size of the first air passages 11b.

[0135] In other embodiments, the number of medium wall groups 111A can also be greater than two.

[0136] The spaced medium walls 111 of the two medium wall groups 111A shown in FIGS. 8-10 are perpendicular to each other, so that the aerosol generating substrate section 11 has good processing performance.

[0137] In other embodiments, whether the number of medium wall groups 111A is two or not, the spaced medium walls 111 of one medium wall group 111A can be obliquely intersected with the spaced medium walls 111 of another medium wall group 111A.

[0138] In an embodiment, referring to FIGS. 8-10, the aerosol generating substrate section 11 can be provided with a second annular medium wall 115, the second annular medium wall 115 surrounds the heating channel 11a, and the aerosol generating substrate section 11 includes a plurality of third plate-shaped medium walls 116, the plurality of third plate-shaped medium walls 116 are spaced between the second annular medium wall 115 and the spaced medium wall 111 closest to the second annular medium wall 115 to define a plurality of third air passages 11d.

[0139] The second annular medium wall 115 is an annular medium wall, and similar to the first annular medium wall 114, the grid-shaped aerosol generating substrate section 11 can also be defined by the second annular medium wall 115 to form the heating channel 11a, which is equivalent to that the grid-shaped structure is arranged on the outer circumferential side of the second annular medium wall 115.

[0140] The third plate-shaped medium wall 116 is a plate-shaped medium wall, which can be a straight plate or a curved plate, and the shape of the third plate-shaped medium wall 116 can be the same as or different from the plate-shaped spacing medium wall 111.

[0141] The aerosol generating substrate section 11 shown in FIGS. 8 to 10 is provided with a plurality of third plate-shaped medium walls 116, and the space between two adjacent third plate-shaped medium walls 116 is a third air passage 11d.

[0142] The number of the third plate-shaped medium walls 116 is not limited, but the third plate-shaped medium wall 116 mainly serves to support the second annular medium wall 115, and therefore, a small number of third plate-shaped medium walls 116 can be provided to facilitate processing and manufacturing.

[0143] In other embodiments, only one third plate-shaped medium wall 116 can be provided.

[0144] In other embodiments, the third plate-shaped medium wall 116 can not be provided, for example, the second annular medium wall 115 can be connected to the spacing medium wall 111 closest to the first annular medium wall 114 to define a plurality of third air passages 11d.

[0145] In other embodiments, the second annular medium wall 115 can not be provided, for example, the heating channel 11a can be surrounded by the spacing medium wall 111.

[0146] In the description of the present application, the description of the terms "in an embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0147] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, and the like made within the principle and technical scope of the present application are included in the protection scope of the present application.

Claims

1. An aerosol generating substrate segment, having a heating channel and a plurality of spacer medium walls equidistantly arranged along a radial direction of the heating channel outside the heating channel so as to form a first spacing space between two adjacent spacer medium walls for defining a first air passage.

2. The aerosol generating substrate segment according to claim 1, wherein the spacer medium walls are annular, and the aerosol generating substrate segment further comprises a first plate-shaped medium wall connected to the two adjacent spacer medium walls so as to define the first air passage in the first spacing space.

3. The aerosol generating substrate segment according to claim 2, wherein a plurality of the first plate-shaped medium walls are arranged between the two adjacent spacer medium walls and are spaced along a circumferential direction of the spacer medium walls so as to define a plurality of the first air passages in the first spacing space.

4. The aerosol generating substrate segment according to claim 3, wherein a cross-sectional area of the first air passage between each two adjacent spacer medium walls increases from inside to outside along the radial direction.

5. The aerosol generating substrate segment according to claim 3 or 4, wherein the number of the first plate-shaped medium walls between the two adjacent spacer medium walls is 2-20; and / or, a wall thickness of each of the first plate-shaped medium walls is 0.05-1 mm.

6. The aerosol generating substrate segment according to any one of claims 2-4, wherein the number of the spacer medium walls is 3-11; and / or, a shape of a cross section of each of the spacer medium walls is one of a circle, a polygon, an ellipse, a racetrack, and a special shape.

7. The aerosol generating substrate segment according to any one of claims 2-4, wherein, among the plurality of spacer medium walls, a space surrounded by the innermost spacer medium wall along the radial direction is the heating channel; and the number of the first plate-shaped medium walls in the first spacing space closest to the heating channel is less than the number of the first plate-shaped medium walls in each of the other first spacing spaces.

9. The aerosol generating substrate segment according to claim 8, wherein the number of the first plate-shaped medium walls in each of the other first spacing spaces is the same and is arranged in alignment, and the first plate-shaped medium walls in the first spacing space closest to the heating channel are arranged in staggered alignment with the first plate-shaped medium walls in the other first spacing spaces.

10. The aerosol generating substrate segment according to claim 2, further comprising a second plate-shaped medium wall and a first annular medium wall surrounding the heating channel, wherein a distance between the first annular medium wall and the spacer medium wall closest to the first annular medium wall is different from a distance between two adjacent spacer medium walls; and the second plate-shaped medium wall is connected to the first annular medium wall and the spacer medium wall closest to the first annular medium wall so as to define a second air passage between the first annular medium wall and the spacer medium wall closest to the first annular medium wall.

8. An aerosol-generating substrate segment according to claim 7, the number of spacer medium walls being greater than two, wherein, ​ ​ ​ 11. The rod according to claim 10, wherein a distance between the first annular medium wall and the spacer medium wall closest to the first annular medium wall is non-equal.

12. The rod according to claim 11, wherein the first annular medium wall and each of the spacer medium walls are concentrically arranged, and a shape of a cross section of at least the spacer medium wall closest to the first annular medium wall is different from a shape of a cross section of the first annular medium wall.

13. The rod according to any one of claims 10-12, wherein a plurality of the second plate-shaped medium walls is provided in a number of multiple, and the plurality of the second plate-shaped medium walls is arranged in a circumferential direction of the first annular medium wall to define a plurality of the second air passages.

14. The rod according to claim 1, wherein the rod has at least two medium wall groups, each of the medium wall groups has at least three of the spacer medium walls in a plate shape, and the spacer medium walls of one of the medium wall groups intersect with the spacer medium walls of another of the medium wall groups to collectively define a plurality of the first air passages.

15. The rod according to claim 14, wherein the number of the medium wall groups is two, and the spacer medium walls of the two of the medium wall groups are perpendicular to each other.

16. The rod according to claim 14 or 15, wherein the rod comprises a second annular medium wall surrounding the heating passage; the second annular medium wall connects with the spacer medium wall closest to the first annular medium wall to define a plurality of third air passages; or the rod comprises a plurality of third plate-shaped medium walls, and the plurality of the third plate-shaped medium walls is arranged in a spaced manner between the second annular medium wall and the spacer medium wall closest to the second annular medium wall to define a plurality of third air passages.

17. The rod according to claim 1, wherein each of the spacer medium walls has a wall thickness of 0.05mm-1mm; and / or a pore size of the heating passage is 0.5mm-7mm; and / or a shape of a cross section of the heating passage is one of a circle, a polygon, an ellipse, a racetrack, and a special shape.

18. An aerosol generating article comprising: the rod according to any one of claims 1-17; a functional rod arranged at one end of the rod in an extending direction of the heating passage, the functional rod comprising at least a filter rod for filtering an aerosol; an outer wrapper wrapped around the functional rod and an outer circumferential side of the rod.

19. The aerosol generating article according to claim 18, wherein the functional rod further comprises at least one of a cooling rod and a support rod arranged between the rod and the filter rod.

20. The aerosol generating article according to claim 18 or 19, further comprising a cleaning rod arranged at an end of the rod away from the functional rod.

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