Aerosol-generating substrate, aerosol-generating product, and aerosol-generating device

Abstract

[0010] The present application provides an aerosol-generating substrate and an aerosol-generating product, wherein the aerosol-generating substrate is cylindrical and has a heating element insertion hole therein, the heating element insertion hole extending along the length of the aerosol-generating substrate and penetrating at least one end of the aerosol-generating substrate along the length of the substrate. By providing the heating element insertion hole in the aerosol-generating substrate of the present application, when the heating element is inserted into the heating element insertion hole, the heating element exerts little or no pressure on the structure around the heating element insertion hole. This allows the aerosol-generating substrate to maintain a relatively uniform substrate density and is less likely to cause deformation or rupture of the outer coating layer coated on the circumferential exterior of the aerosol-generating substrate. Furthermore, when the aerosol-generating substrate is separated from the aerosol-generating device after heating is completed, the aerosol-generating substrate is less likely to adhere to the heating element or fall into the heating chamber, thereby contaminating the heating chamber, thereby reducing the amount of cleaning required by the user.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application is based on and claims priority from a Chinese patent application bearing application number 202310186462.6 and filed on February 20, 2023, the entire contents of which are incorporated herein by reference.

[0002] FIELD OF THE INVENTION This application relates to the technical field of smoke generating products, and in particular to aerosol-generating substrates, aerosol-generating products and aerosol-generating devices. [Background technology]

[0003] Smoke-generating products include those that form aerosols by combustion and those that form aerosols by non-heating combustion. A typical non-heating combustion smoke-generating product includes an aerosol-generating substrate, such as a tobacco material, a flavor material, and / or an atomizing agent, that can volatilize when heated to generate an aerosol. The aerosol-generating substrate is heated by an external heat source to a temperature that does not result in combustion but is capable of releasing the aerosol-generating substrate, and the atomizing agent is released by high-temperature heating during use to form smoke.

[0004] In the prior art, a heating element is provided in the heating chamber of the aerosol generator, and when inhaling, a smoke-generating product is inserted into the heating chamber of the aerosol generator, and the heating element heats the smoke-generating product. When the aerosol-generating substrate is separated from the heating element after heating, the two move relative to each other, and solid powder particles such as residues attached to the heating element tend to fall into the aerosol generator. This requires users to regularly clean the heating chamber, which not only increases the user's workload but also may cause damage to the heating element if cleaning is not done properly. Summary of the Invention

[0005] In view of this, the embodiments of the present application are expected to provide an aerosol-generating substrate, an aerosol-generating product, and an aerosol-generating device, which are less likely to adhere to the heating element or fall into the heating chamber, thereby reducing the amount of cleaning work required by the user.

[0006] To achieve the above object, an embodiment of the present application provides an aerosol-generating substrate, which is cylindrical and has a heating element insertion hole therein, and the heating element insertion hole extends along the length of the aerosol-generating substrate and penetrates at least one end along the length of the aerosol-generating substrate.

[0007] In one embodiment, the aerosol-generating substrate has a passageway extending along the length of the aerosol-generating substrate and penetrating at least one end of the aerosol-generating substrate along the length of the substrate.

[0008] In one embodiment, the heating element insertion hole is one in number and extends along the length of the aerosol generating substrate, and the heating element insertion hole is provided on the central axis of the aerosol generating substrate.

[0009] In one embodiment, the passage includes a plurality of airway holes, the plurality of airway holes being provided inside the aerosol-generating substrate, and in a cross-section perpendicular to the longitudinal direction of the aerosol-generating substrate, the cross-section of the heating element insertion hole is longitudinal, and the airway holes are distributed symmetrically with respect to the heating element insertion hole.

[0010] In one embodiment, the passage includes a plurality of airway holes, the plurality of airway holes are provided inside the aerosol-generating substrate, the heating element insertion holes are cylindrical holes, and in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate, the airway holes are distributed symmetrically about the origin with respect to the heating element insertion holes.

[0011] In one embodiment, the passage includes a plurality of airway holes, the plurality of airway holes being provided inside the aerosol-generating substrate, the center line along the extension direction of the heating element insertion hole overlapping with the central axis along the length direction of the aerosol-generating substrate, and each of the airway holes being arranged along a circumferential direction surrounding the center of the heating element insertion hole.

[0012] In one embodiment, the passage includes a plurality of airway holes, the plurality of airway holes being provided within the aerosol-generating substrate, and all of the airway holes being distributed along a plurality of trajectory lines, wherein each of the airway holes on a single trajectory line is linearly arranged along a first direction, and the plurality of trajectory lines are arranged along a second direction, and the first direction and the second direction are not parallel.

[0013] In one embodiment, each of the airway holes on a single trajectory line is linearly arranged along the first direction, and multiple trajectory lines are arranged parallel to each other along a second direction, and the first direction and the second direction are perpendicular to each other.

[0014] In one embodiment, the distance between two adjacent said airway openings on a single locus line is equal to the distance between two adjacent locus lines.

[0015] In one embodiment, each of the airway holes on a single trajectory line is arranged along a circumferential direction surrounding the center of the aerosol-generating substrate, and multiple trajectory lines are arranged in concentric circles along the radial direction of the aerosol-generating substrate.

[0016] In one embodiment, the airway openings on a single trajectory line are arranged in an overlapping arrangement, with the pore size of the airway openings on each trajectory line gradually increasing along the radial outward direction of the aerosol-generating substrate.

[0017] In one embodiment, the airway holes on a single trajectory line are arranged in an overlapping arrangement, with the spacing between the airway holes on two adjacent trajectory lines gradually decreasing along the radial outward direction of the aerosol-generating substrate.

[0018] In one embodiment, the aerosol-generating substrate is of monolithic construction.

[0019] In one embodiment, the heating element insertion hole penetrates opposite ends along the length of the aerosol-generating substrate, and the cross-sectional shape of the aerosol-generating substrate is circular in a plane perpendicular to the length of the aerosol-generating substrate.

[0020] In one embodiment, the passage includes a plurality of spiral airways, the spiral airways being provided within the aerosol-generating substrate, and at least a portion of the region along the extension direction of the spiral airways being curved with a non-zero curvature.

[0021] In one embodiment, the passageway comprises an airway groove, the airway groove being provided on the circumferential surface of the aerosol-generating substrate.

[0022] In one embodiment, the aerosol-generating substrate is a particle conjugate, and pores are formed between the particles of the particle conjugate, and a plurality of the pores are connected to form fine airways that communicate with the passage and / or the heating element insertion hole, and the cross-sectional area of ​​the pores is 0.7 nm 2 ~710μm 2 Alternatively, the hydraulic diameter of the pores is 10 nm to 30 μm.

[0023] In one embodiment, the cross-sectional shape of the heating element insertion hole in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate is elongated, circular, elliptical, annular, arc-shaped, sawtooth, or polygonal.

[0024] In one embodiment, the cross section of the aerosol-generating substrate perpendicular to the longitudinal direction of the aerosol-generating substrate has a longitudinal cross section of the heating element insertion hole, and the length of the cross section is 1 mm to 40 mm; and / or The width of the cross section is 0.05 mm to 3 mm.

[0025] In one embodiment, the cross-sectional shape of the heat generating element insertion hole is circular, and the diameter of the heat generating element insertion hole is 0.1 mm to 3 mm.

[0026] In one embodiment, the heat generating element insertion hole is a columnar hole, and the cross-sectional area of ​​the heat generating element insertion hole is 0.01 mm2 ~7.1mm 2 is.

[0027] An embodiment of the present application further provides an aerosol-generating product, the aerosol-generating product comprising an aerosol-generating substrate according to any one of the preceding claims, a functional segment, and an outer coating layer, the functional segment is provided at one end along the length of the aerosol-generating substrate and includes at least a filtering segment for filtering the aerosol; The outer coating layer is applied to the circumferential exterior of the functional segment and the aerosol-generating substrate.

[0028] In one embodiment, the functional segment further comprises a temperature-reducing segment, the temperature-reducing segment being located between the filtration segment and the aerosol-generating substrate.

[0029] An embodiment of the present application further provides an aerosol generating device, which is used in conjunction with the aerosol generating product described above, and the aerosol generating device includes a heat generating component, which includes a heating element, and the heating element is inserted into the heating element insertion hole and used to heat the aerosol generating substrate and generate aerosol.

[0030]

[0009] The embodiments of the present application provide an aerosol-generating substrate, an aerosol-generating product, and an aerosol-generating device, wherein the aerosol-generating substrate is cylindrical and may be, for example, a one-piece structure manufactured by an extrusion process, and the aerosol-generating substrate has a heating element insertion hole extending along the length of the aerosol-generating substrate, the heating element insertion hole penetrating at least one end of the aerosol-generating substrate along the length of the substrate. By providing the heating element insertion hole inside the aerosol-generating substrate, the heating element insertion hole can be adapted to the shape of the heating element of the aerosol-generating device, allowing the heating element of the aerosol-generating device to be inserted and fitted into the heating element insertion hole, which is advantageous for inserting the heating element into the aerosol-generating substrate without compressing the structure around the heating element insertion hole, thereby maintaining a relatively uniform substrate density and reducing the risk of deformation or rupture of the outer coating layer coated around the circumferential exterior of the aerosol-generating substrate. Furthermore, when the aerosol-generating substrate is separated from the aerosol-generating device after heating is completed, the aerosol-generating substrate is less likely to adhere to the heating element or fall into the heating chamber, thereby less likely to contaminate the heating chamber, thereby reducing the amount of cleaning work required by the user and further improving the user's user experience. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a structural schematic diagram of an aerosol generating device according to an embodiment of the present application. [Figure 2] 1 is a cross-sectional view of a first aerosol generating device according to an embodiment of the present application. [Figure 3] FIG. 2 is a cross-sectional view of a second aerosol generating device according to an embodiment of the present application. [Figure 4] FIG. 10 is a cross-sectional view of a third aerosol generating device according to an embodiment of the present application. [Figure 5] 1 is a structural schematic diagram of an aerosol-generating product according to an embodiment of the present application. [Figure 6] 1 is a cross-sectional view of a first aerosol-generating product according to an embodiment of the present application. [Figure 7] FIG. 2 is a cross-sectional view of a second aerosol-generating product according to an embodiment of the present application. [Figure 8]FIG. 10 is a cross-sectional view of a third aerosol-generating product according to an embodiment of the present application. [Figure 9] FIG. 1 is a structural schematic diagram of a first aerosol-generating substrate according to an embodiment of the present application. [Figure 10] FIG. 1 is a structural schematic diagram of a second aerosol-generating substrate according to an embodiment of the present application. [Figure 11] FIG. 1 is a structural schematic diagram of a third aerosol-generating substrate according to an embodiment of the present application. [Figure 12] FIG. 1 is a structural schematic diagram of a fourth aerosol-generating substrate according to an embodiment of the present application. [Figure 13] FIG. 10 is a structural schematic diagram of a fifth aerosol-generating substrate according to an embodiment of the present application. [Figure 14] FIG. 10 is a structural schematic diagram of a sixth aerosol-generating substrate according to an embodiment of the present application. [Figure 15] FIG. 10 is a structural schematic diagram of the seventh aerosol-generating substrate according to an embodiment of the present application. [Figure 16] FIG. 10 is a structural schematic diagram of the eighth aerosol-generating substrate according to an embodiment of the present application. [Figure 17] FIG. 10 is a structural schematic diagram of the ninth aerosol-generating substrate according to an embodiment of the present application. [Figure 18] FIG. 13 is a structural schematic diagram of the tenth aerosol-generating substrate according to the present application. [Figure 19] FIG. 14 is a structural schematic diagram of the eleventh aerosol-generating substrate according to the embodiment of the present application. [Figure 20] FIG. 12 is a cross-sectional view of the twelfth example of an aerosol-generating substrate according to the present application. [Figure 21] FIG. 13 is a cross-sectional view of the thirteenth example of an aerosol-generating substrate according to the present application. [Figure 22] FIG. 14 is a structural schematic diagram of the aerosol-generating substrate according to the fourteenth embodiment of the present application. [Figure 23] FIG. 15 is a structural schematic diagram of the aerosol-generating substrate according to the fifteenth embodiment of the present application. [Figure 24] FIG. 16 is a structural schematic diagram of the aerosol-generating substrate according to the sixteenth embodiment of the present application. [Figure 25] FIG. 17 is a structural schematic diagram of the aerosol-generating substrate according to the seventeenth embodiment of the present application. [Figure 26] FIG. 17 is a structural schematic diagram of the 18th example of the aerosol-generating substrate of the present application. [Figure 27] FIG. 19 is a structural schematic diagram of the 19th aerosol-generating substrate according to an embodiment of the present application. [Figure 28] FIG. 10 is a structural schematic diagram of the 20th aerosol-generating substrate according to an embodiment of the present application. [Figure 29] FIG. 21 is a structural schematic diagram of the 21st aerosol-generating substrate according to the present application. [Figure 30] FIG. 22 is a structural schematic diagram of the 22nd aerosol-generating substrate according to the present application. [Figure 31] FIG. 23 is a structural schematic diagram of the 23rd aerosol-generating substrate in the present application. [Figure 32] FIG. 10 is a structural schematic diagram of the 24th aerosol-generating substrate according to an embodiment of the present application. [Figure 33] FIG. 33 is a cross-sectional view of FIG. 32. [Figure 34] FIG. 33 is a perspective view of FIG. 32. [Figure 35] FIG. 10 is a structural schematic diagram of the 25th aerosol-generating substrate according to an embodiment of the present application. [Figure 36] This is a schematic cross-sectional view of the structure of the 26th aerosol-generating substrate in the present application. DETAILED DESCRIPTION OF THE INVENTION

[0032] It should be noted that the technical features in the examples and examples of the present application can be combined with each other if they do not conflict, and the detailed description of specific embodiments should be understood as an interpretation and explanation of the gist of the present application, and should not be considered as an undue limitation on the present application.

[0033] An embodiment of the present application provides an aerosol-generating substrate. Referring to Figures 5 to 35, the aerosol-generating substrate 10 is cylindrical and has a heating element insertion hole 10d therein. The heating element insertion hole 10d extends along the length of the aerosol-generating substrate 10 and penetrates at least one end of the aerosol-generating substrate 10 along the length.

[0034] The aerosol-generating substrate 10 generates an aerosol upon heating, which is inhaled by a user. In the embodiment of the present application, the aerosol-generating substrate 10 is substantially cylindrical. Here, the cylindrical shape may be a cylinder (i.e., having a circular cross-section), a prismatic column (i.e., having a polygonal cross-section), an elliptical column (i.e., having an elliptical cross-section), or the like, but is not limited thereto.

[0035] For example, the aerosol-generating substrate 10 is a particle aggregate, also known as a powder aggregate, and is a reconstituted tobacco medium, e.g., a reconstituted tobacco medium containing components such as a smoke-generating agent and tobacco. The aerosol-generating substrate 10 has a monolithic structure, for example, a monolithic structure that can be formed by extrusion molding, injection molding, or an extrusion process. Here, extrusion refers to a processing method in which a raw material mixture is fed into an extruder, and the material is heated and shaped by the action of the extruder's barrel and screw, and then pushed forward by the screw and continuously passed through a die at the extruder's outlet to form various cross-sectional products or semi-finished products. The medium structure formed by extrusion molding is elongated. In this way, the aerosol-generating substrate 10 remains a monolithic medium after being heated and sucked, or after heating is stopped, and is less likely to collapse and fall off. This solves the problems of flake-like, filament-like, or dispersed particle-like aerosol-generating substrates 10 in the prior art, such as shedding of flakes, shedding of filament-like or particle-like components, difficulty in cleaning, and uneven composition.

[0036] The aerosol-generating substrate 10 has a heating element insertion hole 10d therein, which extends along the length of the aerosol-generating substrate, i.e., the heating element insertion hole 10d extends along the vertical direction of the aerosol-generating substrate 10, and the heating element insertion hole 10d is used to insert and fit the heating element 20 of the aerosol-generating device 200.

[0037] The heating element insertion hole 10d penetrating at least one end of the aerosol-generating substrate 10 in the length direction means that the heating element insertion hole 10d can penetrate both opposite ends of the aerosol-generating substrate 10 in the length direction (see FIG. 20), or one end of the heating element insertion hole 10d may penetrate an end face of the aerosol-generating substrate 10 in the length direction, and the other end of the heating element insertion hole 10d may be blind (see FIG. 21). It can be understood that having the heating element insertion hole 10d penetrating both ends of the aerosol-generating substrate 10 in the length direction is more advantageous for aerosol emission than having the heating element insertion hole 10d penetrating only one end of the aerosol-generating substrate 10 in the length direction.

[0038] An embodiment of the present application further provides an aerosol-generating product, and referring to Figures 5 to 8, the aerosol-generating product includes a functional segment 30, an outer coating layer 40, and an aerosol-generating substrate 10 of any embodiment of the present application.

[0039] It should be noted that the aerosol-generating product 100 generates an aerosol using the aerosol-generating substrate 10, and the functional segment 30 is not used for generating the aerosol. Here, the functional segment 30 is provided at one end along the length of the aerosol-generating substrate 10. Here, referring to FIGS. 6 to 8, the functional segment 30 includes at least a filtration segment 31 for filtering the aerosol. The filtration segment 31 may also be called a filter tip. A user inhales the filtered aerosol through the filtration segment 31 of the functional segment 30.

[0040] It should be noted that the aerosol-generating product of the embodiments of the present application can be adapted for inhalation by combustion or by heating without combustion. In the embodiments of the present application, the aerosol-generating product 100 is described as being adapted for inhalation by heating without combustion.

[0041] An embodiment of the present application further provides an aerosol-generating device for use with the aerosol-generating product provided in the embodiments of the present application. Referring to Figures 1 to 4, the aerosol-generating device 200 includes a heat-generating component, which includes a heating element 20. The heating element 20 is inserted into the heating element insertion hole 10d of the aerosol-generating substrate 10 and is used to heat the aerosol-generating substrate 10 and generate an aerosol.

[0042] 2 to 4, the aerosol-generating device 200 comprises a housing 201 and a power supply component provided within the housing 201. The housing 201 has a storage chamber. An electric energy output unit of the power supply component is provided within the storage chamber or around the side wall of the storage chamber. When a portion of the aerosol-generating product 100 corresponding to the length range in which the aerosol-generating substrate 10 is located is inserted into the storage chamber, the electric energy output unit transmits electric energy to the heating element 20 in a contact or non-contact manner. The heating element 20 generates heat upon receiving energy from the outside, thereby heating and atomizing the aerosol-generating substrate 10 and generating an aerosol.

[0043] In the embodiments of the present application, the length direction does not particularly refer to the longest direction of the external outline of the aerosol-generating substrate 10. Specifically, the arrangement direction of the functional segments 30 and the aerosol-generating substrate 10 coincides with the length direction. The direction in which the aerosol-generating product 100 is inserted into the heating chamber 200a and the direction in which the aerosol-generating product 100 is removed from the heating chamber 200a are both parallel to the length direction. The length of the aerosol-generating substrate 10 along the length direction may be longer, shorter, or the same as the length in other directions.

[0044] For example, if the aerosol-generating substrate 10 has a cylindrical outer contour, the length direction is the axial direction of the aerosol-generating substrate 10. It should be noted that even if the axial length of the aerosol-generating substrate 10 is shorter than its diameter, the length direction of the aerosol-generating substrate 10 is still the axial direction. As another example, if the aerosol-generating substrate 10 has a rectangular parallelepiped outer contour, the length direction is still the direction defined above, i.e., the direction in which the functional segments 30 and the aerosol-generating substrate 10 are aligned, or the direction in which the aerosol-generating product 100 is removed from the heating chamber 200a and placed back into the heating chamber 200a. The length direction of the aerosol-generating substrate 10 may be the length, width, or height direction of the rectangular parallelepiped.

[0045] For example, when the aerosol-generating substrate 10 is used alone, i.e., not combined with the functional segment 30, the length direction is the vertical direction between both ends of the aerosol-generating substrate 10. For example, if the aerosol-generating substrate 10 is cylindrical, the length direction is the vertical direction between the two end faces. For example, if the aerosol-generating substrate 10 has a columnar cross section such as a triangle, polygon, oval, or ellipse, the length direction is the axial direction. If the aerosol-generating substrate 10 is rectangular, the length direction of the aerosol-generating substrate 10 may be the length, width, or height direction of the rectangular parallelepiped.

[0046] In the aerosol-generating substrate 10 according to the embodiment of the present application, the heating element insertion hole 10d is formed during manufacturing of the aerosol-generating substrate 10. During use, the heating element 20 is inserted into the heating element insertion hole 10d. When the heating element 20 is inserted into the heating element insertion hole 10d, it exerts little or no pressure on the surrounding structure. This allows the aerosol-generating substrate 10 to maintain a relatively uniform substrate density, reducing the risk of deformation or rupture of the outer coating layer 40 that covers the circumferential exterior of the aerosol-generating substrate 10. Furthermore, when the aerosol-generating substrate 10 is separated from the aerosol-generating device 200 after heating is completed, the aerosol-generating substrate 10 is less likely to adhere to the heating element or fall into the heating chamber 200a, thereby contaminating the heating chamber 200a. This reduces the user's cleaning workload and improves the user experience.

[0047] For example, the aerosol-generating substrate 10 has a monolithic structure. Specifically, the aerosol-generating substrate 10 can be directly molded into a desired shape using a mold, rather than being formed by connecting multiple independent sub-blocks by adhesive or other means. As a result, the aerosol-generating substrate 10 has relatively good structural strength and is less susceptible to disintegration.

[0048] The material of the above-mentioned filtration segment 31 includes, but is not limited to, triacetate cellulose, diacetate cellulose, polypropylene cellulose, polyester cellulose, and the like.

[0049] The outer coating layer 40 is coated on the outer circumferential surface of the functional segment 30 and the aerosol-generating substrate 10 .

[0050] The material of the outer coating layer 40 is not limited, but may include, for example, one or more combinations of materials such as fiber paper, metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, PE, PBAT, etc.

[0051] 6 and 8, the functional segment 30 includes only a filtration segment 31. In other embodiments, referring to FIG. 7, in addition to the filtration segment 31, the functional segment 30 also includes a support segment (not shown) and / or a temperature-reducing segment 32, which are disposed between the aerosol-generating substrate 10 and the filtration segment 31.

[0052] Here, the temperature-reducing segment 32 is used to perform a temperature-reducing process on the aerosol before the filtering segment 31 filters the aerosol, thereby lowering the temperature of the aerosol and improving the "burning sensation in the mouth" phenomenon when the user inhales the aerosol.

[0053] Materials for the temperature-reducing segment 32 include, but are not limited to, one or more combinations of polyethylene (PE), polylactic acid (PLA, also known as polylactide), butyleneadipate-co-terephthalate (PBAT), polypropylene (PP), acetate fiber, and acrylic fiber materials.

[0054] The material of the filtration segment 31 may include, but is not limited to, one or more combinations of polyethylene (PE), polylactic acid (PLA, also known as polylactide), butyleneadipate-co-terephthalate (PBAT), polypropylene (PP), acetate fiber, and acrylic fiber materials.

[0055] The materials of the temperature-reducing segment 32 and the filtering segment may be the same or different.

[0056] The support segments have a certain structural strength and act as axial stoppers for the aerosol-generating substrate 10. Specifically, when the aerosol-generating product 100 is inserted into the heating chamber 200a of the aerosol-generating device 200, or when a heating element is inserted into the aerosol-generating substrate 10, the support segments apply a counterforce to the aerosol-generating substrate 10, preventing the aerosol-generating substrate 10 from moving axially.

[0057] The specific components of the aerosol-generating substrate 10 are not limited herein. For example, in one embodiment, the aerosol-generating substrate 10 may include a botanical component, an adjuvant component, a smoke-generating agent component, an adhesive component, etc.

[0058] In one embodiment, the botanical ingredients are one or more combinations of powders formed by grinding tobacco leaf stock, tobacco shreds, tobacco stems, tobacco powder, flavoring plants, etc. The botanical ingredients are used to generate an aerosol containing nicotine, etc., upon heating.

[0059] In one embodiment, the auxiliary component may be a combination of one or more of an inorganic filler, a lubricant, and an emulsifier. Here, the inorganic filler may include a combination of one or more of ground calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. The inorganic filler can provide skeletal support for the plant component. At the same time, the inorganic filler also contains pores 10e, which can increase the porosity of the wall material after the plant component is formed, thereby improving the aerosol release rate.

[0060] The lubricant may be one or more of the following: candle wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, palmitic acid, etc. The lubricant can improve particle flowability, reduce inter-particle friction, make the overall particle density more uniform, reduce the pressure required for molding, and reduce mold wear.

[0061] The emulsifier may be one or a combination of polyglycerol fatty acid ester, Twain-80, or polyvinyl alcohol. The emulsifier (also known as a surfactant) reduces the interfacial tension between the water-soluble and water-insoluble components in a mixed system, forming a relatively firm thin film on the surface of the droplets, or forming a double electric layer on the surface of the droplets due to the charge of the emulsifier, preventing the droplets from coagulating and maintaining a uniform emulsion. The homogeneous emulsification of two incompatible components can improve the consistency of product quality.

[0062] In one embodiment, the function of the smoke generant component is to generate a large amount of steam upon heating, thereby increasing the aerosol yield of the smoke-generating product. The smoke generant may include, for example, one or more combinations of monohydric alcohols (e.g., menthol), polyhydric alcohols (e.g., propylene glycol, triethylene glycol, 1,3-butanediol, and glycerin), esters of polyhydric alcohols (e.g., monoacetin, diacetin, triacetin), monocarboxylic acids, polycarboxylic acids (e.g., lauric acid, myristic acid), or aliphatic esters of polycarboxylic acids (e.g., dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triactin, mesoerythritol, diacetin mixtures, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, tributyrin, and lauryl acetate).

[0063] In one embodiment, the adhesive component is a non-ionized modified viscous polysaccharide extracted from natural plants, such as tamarind polysaccharide, pullulan, seaweed polysaccharide, locust bean gum, guar gum, and xyloglucan. The adhesive is used to adhere particles together and prevent them from falling apart. It also improves the water resistance of the aerosol-generating substrate 10, is harmless to the human body, and has certain health benefits.

[0064] 9 to 34, the aerosol-generating substrate 10 is cylindrical, i.e., the cross-sectional profile of the aerosol-generating substrate 10 is a regular circle or a nearly circular shape in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10. The cylindrical aerosol-generating substrate 10 has a regular outer shape, which can reduce the difficulty of the manufacturing process.

[0065] In one embodiment, the aerosol-generating substrate 10 has a passage 10c that extends along the length of the aerosol-generating substrate 10 and penetrates at least one end of the aerosol-generating substrate 10 along the length of the aerosol-generating substrate 10. That is, the passage 10c extends along the longitudinal direction of the aerosol-generating substrate 10.

[0066] The passage 10c penetrating at least one end of the aerosol-generating substrate 10 along its length means that the passage 10c can penetrate opposite ends of the aerosol-generating substrate 10 along its length (see Figure 20), and the airflow can flow from one end of the aerosol-generating substrate 10 along its length to the other end of the aerosol-generating substrate 10 along its length through the passage 10c.

[0067] Of course, referring to Figure 21, one end of the passage 10c may penetrate the end face along the length of the aerosol-generating substrate 10, and the other end of the passage 10c may be blind. Here, as shown in Figure 21, each passage 10c penetrates the same end along the length of the aerosol-generating substrate 10. In other embodiments, part of the passage 10c may penetrate one end along the length of the aerosol-generating substrate 10, and another part of the passage 10c may penetrate the other end along the length of the aerosol-generating substrate 10.

[0068] As can be understood, having the airway holes 10a penetrate both ends of the aerosol-generating substrate 10 along its length is advantageous in reducing the resistance to inhalation by the user, compared to having the airway holes 10a penetrate one end of the aerosol-generating substrate 10 along its length.

[0069] The passage 10c increases the surface area of ​​the aerosol-generating substrate 10, facilitating heat transfer and improving heating efficiency. The aerosol in the passage 10c is transported to the suction end under the action of negative suction pressure, and the passage 10c reduces the resistance to inhalation when the user inhales, improving the user's experience. It should be noted that the resistance to inhalation is positively correlated with the flow resistance of the aerosol. The smaller the flow resistance of the aerosol in the aerosol-generating substrate 10, the smaller the resistance to inhalation felt by the user. Conversely, the greater the flow resistance of the aerosol in the aerosol-generating substrate 10, the greater the resistance to inhalation felt by the user.

[0070] It should be explained that, referring to Figure 36, the aerosol-generating substrate 10 is a particle conjugate, and pores 10e are formed between the particles of the particle conjugate, i.e., the gaps between the particles constitute the pores 10e, and the pores 10e are connected to each other to form fine airways that communicate with the passages 10c and / or the heating element insertion holes 10d.

[0071] The passages 10c and fine airways increase the surface area of ​​the aerosol-generating substrate 10, facilitating heat transfer and improving heating efficiency. The medium of the aerosol-generating substrate 10 emits aerosol upon exposure to heat, which is collected in the passages 10c through gaps between the wall materials or through the fine airways. The aerosol emitted from the nebulizing medium exposed to the airway hole 10a (i.e., the nebulizing medium located on the inner wall surface of the airway hole) can be emitted directly into the airway hole 10a. Aerosol between adjacent airway holes 10a can also communicate with each other through the fine airways and be transported to the suction end under the action of negative suction pressure.

[0072] It should be noted that the above-mentioned channels 10c are macroscopic pores, while the pores 10e are microscopic pores, and the cross-sectional area of ​​the channels 10c is much larger than that of the pores 10e. The size of the pores 10e is determined by the gaps between particles.

[0073] Exemplarily, the cross-sectional area of ​​the pore 10e is 0.7 nm 2 (square nanometer) ~ 710μm 2 (square micrometer), for example, 1 nm2 , 10nm 2 , 25nm 2 , 30nm 2 , 40nm 2 , 50nm 2 , 60nm 2 , 70nm 2 , 80nm 2 , 100 nm 2 , 200 nm 2 , 300 nm 2 , 400nm 2 , 500nm 2 , 600nm 2 , 700nm 2 , 800nm 2 , 900nm 2 , 100 μm 2 , 200 μm 2 , 300 μm 2 , 400 μm 2 , 500 μm 2 , 600 μm 2 , 700 μm 2 And so on.

[0074] The cross-sectional area of ​​pore 10e is 0.7 nm 2 If the cross-sectional area of ​​the pores 10e of the medium body is less than 710 μm, the active ingredient inside the medium is less likely to volatilize to the airway pores 10a, resulting in a decrease in the medium utilization rate. 2 If the cross-sectional area of ​​the pores 10e is larger than 0.7 nm, the heat conduction in the pores 10e becomes uneven, resulting in a poor suction experience. 2 ~710μm 2 By controlling the amount of airflow, not only can the utilization rate of the medium be improved, but the suction experience can also be improved.

[0075] Preferably, the cross-sectional area of ​​the pore 10e is 1963 nm 2 ~20μm 2 is.

[0076] Exemplarily, the hydraulic diameter of the pores 10e is 10 nm (nanometers) to 30 μm (micrometers), for example, 10 nm, 20 nm, 24 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 700 nm, 800 nm, 900 nm, 1 μm, 2 μm, 3 μm, etc.

[0077] If the hydraulic diameter of the pores 10e is less than 10 nm, the active ingredient in the aerosol-generating substrate 10 is less likely to volatilize to the airway pores 10a, resulting in a reduced substrate utilization rate. If the hydraulic diameter of the pores 10e of the aerosol-generating substrate 10 is greater than 30 μm, heat conduction through the pores 10e becomes uneven, resulting in a reduced inhalation experience. Therefore, in this embodiment, by controlling the hydraulic diameter of the pores 10e to 10 nm to 30 μm, not only the substrate utilization rate but also the inhalation experience can be improved.

[0078] For example, the hydraulic diameter of the pores 10e is 50 nm to 5 μm.

[0079] The number of the heat generating element insertion hole 10d may be one or more. In the embodiment of the present application, an example in which the number of the heat generating element insertion hole 10d is one will be described.

[0080] For example, there is only one heating element insertion hole 10d, and it extends along the length of the aerosol-generating substrate 10. That is, the size of the heating element insertion hole 10d in the length direction of the aerosol-generating substrate 10 is much larger than the size of the heating element insertion hole 10d in the direction perpendicular to the length direction of the aerosol-generating substrate 10.

[0081] The position of the heating element insertion hole 10d in the plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10 is not limited.

[0082] 10 to 35, for example, the heating element insertion hole 10d is provided on the central axis of the aerosol-generating substrate 10. Here, the central axis is a reference line used as an imaginary reference, and in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the central axis is located at the center of the cross section of the aerosol-generating substrate 10. In this embodiment, when the heating element 20 is inserted into the heating element insertion hole 10d, heating of the entire aerosol-generating substrate 10 is distributed radially, and heating becomes relatively uniform in the entire circumferential direction surrounding the heating element 20, allowing the aerosol-generating substrate 10 to stably and uniformly emit aerosol.

[0083] In other embodiments, the heating element insertion hole 10d may be provided eccentrically with respect to the central axis, i.e., the heating element insertion hole 10d may not be provided on the central axis.

[0084] The specific shape of the heating element insertion hole 10d is not limited. For example, in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross-sectional shape of the heating element insertion hole 10d may be a longitudinal shape as shown in Figures 10, 11, and 16 to 18, a circle as shown in Figures 12 and 23 to 29, an ellipse as shown in Figure 13, a ring shape, an arc shape, or a sawtooth shape as shown in Figure 9, or a polygonal shape as shown in Figures 14 and 15.

[0085] For example, referring to Figures 10, 11, and 16 to 18, in a cross-section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross-section of the heating element insertion hole 10d is longitudinal, and the heating element insertion hole 10d extends along the longitudinal direction of the aerosol-generating substrate 10.

[0086] Here, in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross-sectional shape of the longitudinal heating element insertion hole 10d is not limited and may be, for example, V-shaped, linear, arc-shaped, etc. In this case, the heating element 20 fitted into the heating element insertion hole 10d is sheet-shaped and extends along the longitudinal direction of the aerosol-generating substrate 10.

[0087] Specifically, in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the heat generating element insertion hole 10d has a longitudinal cross section with a length of 1 mm to 40 mm and a width of 0.05 mm to 3 mm. Controlling the length and width of the heat generating element insertion hole 10d makes it easy to control the contact area between the heat generating element 20 and the aerosol-generating substrate 10, which is also advantageous for controlling the heating efficiency.

[0088] For example, the cross-sectional length of the heat generating element insertion hole 10d is 10 mm to 20 mm.

[0089] For example, the width of the cross section of the heat generating element insertion hole 10d is 0.3 mm to 0.8 mm.

[0090] In some other embodiments, referring to FIGS. 12 to 15 and 23 to 29, the heating element insertion hole 10d is a columnar hole and extends along the length of the aerosol-generating substrate 10.

[0091] Here, the cross-sectional shape of the columnar hole in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10 is not limited and may be, for example, circular, elliptical, polygonal, etc. In this case, the heating element 20 fitted into the heating element insertion hole 10d is columnar and extends along the longitudinal direction of the aerosol-generating substrate 10. The cross-sectional shape of the columnar heating element 20 is not limited and may be, for example, circular, elliptical, polygonal, etc.

[0092] In some embodiments, in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross-sectional shape of the heating element insertion hole 10d is circular, and the hole diameter of the heating element insertion hole is 0.1 mm to 3 mm, for example, 0.1 mm, 0.2 mm, 0.4 mm, 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.6 mm, 1.8 mm, 2 mm, 2.1 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, etc.

[0093] In some embodiments, the heating element insertion hole 10d is a columnar hole, and the cross-sectional area of ​​the heating element insertion hole 10d in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10 is 0.01 mm 2 ~7.1mm2 For example, 0.01 mm 2 , 0.08mm 2 , 0.4mm 2 , 0.5mm 2 , 0.8mm 2 , 1mm 2 , 1.6mm 2 , 1.8mm 2 , 2mm 2 , 3mm 2 , 3.2mm 2 , 4mm 2 , 5mm 2 , 6mm 2 , 6.5mm 2 , 6.8mm 2 , 7mm 2 , 7.1mm 2 And so on.

[0094] For example, the heat generating element insertion hole 10d is a columnar hole, and the cross-sectional area of ​​the heat generating element insertion hole 10d in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10 is 0.5 mm 2 ~3.2mm 2 is.

[0095] It should be noted that the number of the passages 10c is not limited, and may be one or more.

[0096] 16 to 34, the passage 10c includes an airway hole 10a, and the airway hole 10a is provided inside the aerosol-generating substrate 10. In other words, at least a part of the passage 10c functions as the airway hole 10a. In a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the hole walls of the airway hole 10a are closed to form a closed hole.

[0097] By providing the airway holes 10a, the surface area of ​​the aerosol-generating substrate 10 is increased (the side walls of the airway holes 10a correspond to part of the surface of the aerosol-generating substrate 10), and the heat of the aerosol-generating substrate 10 can enter the inside of the aerosol-generating substrate 10 from the outer surface of the aerosol-generating substrate 10. This improves heating efficiency compared to the prior art structure in which heat is conducted directly inside the aerosol-generating substrate 10.

[0098] Illustratively, the cross-sectional area of ​​the airway hole 10a is 0.0019 mm 2 ~30mm 2 (square millimeters), for example, 0.002 mm 2 , 0.1mm 2 , 0.2mm 2 , 0.6mm 2 , 1mm 2 , 2mm 2 , 5mm 2 , 7mm 2 , 10mm 2 , 12mm 2 , 16mm 2 , 18mm 2 , 20mm 2 , 21mm 2 , 22mm 2 , 25mm 2 , 26mm 2 , 28mm 2 , 29mm 2 , 30mm 2 And so on.

[0099] The cross-sectional area of ​​the airway hole 10a is 30 mm 2 If it is larger, the number of airway holes 10a will be reduced, the aerosol-generating substrate 10 will be more likely to burn, the internal flow rate of the medium will be lower under the same volume of inhalation, the aerosol will be more likely to accumulate, and the medium utilization rate will be reduced. The aerosol-generating substrate 10 will be more likely to emit uneven aerosol during the heating process (for example, the amount of aerosol emitted will be large in the first two times and small in the last few times), which will affect the user's inhalation sensation.

[0100] The cross-sectional area of ​​the airway hole 10a is 0.0019 mm 2 If it is less than this, the difficulty of the molding process will increase significantly, it will be difficult to control the size of the airway hole 10a, the reject rate of the aerosol-generating substrate 10 will increase, and the aerosol-generating substrate 10 will be prone to problems such as high resistance to suction and low utilization rate.

[0101] The cross-sectional area of ​​the airway hole 10a is 0.0019 mm 2~30mm 2 Within this range, the flow resistance of the aerosol-generating substrate 10 is relatively small (i.e., the suction resistance of suction is relatively small), the aerosol flow rate is appropriate, the aerosol inside the aerosol-generating substrate 10 is easy to extract, the aerosol is emitted relatively uniformly, the utilization rate is relatively high, the aerosol-generating substrate 10 is less likely to burn, the user's experience is relatively good, and the processing and manufacturing are easy.

[0102] 17 to 21, for example, the passage 10c includes an airway groove 10b, and the airway groove 10b is provided on the circumferential surface of the aerosol-generating substrate 10. That is, a partial area of ​​the outer wall of the aerosol-generating substrate 10 is recessed to form the airway groove 10b, which corresponds to the airway groove 10b being in the form of a recessed groove on the outer wall of the aerosol-generating substrate 10.

[0103] 6, the outer coating layer 40 on the periphery of the aerosol-generating substrate 10 can seal the airway groove 10b on the periphery of the aerosol-generating substrate 10, so that the airway groove 10b can serve as an aerosol airflow path 10c, thereby increasing the amount of air entering and the efficiency of aerosol extraction. Furthermore, when the heating component uses circumferential heating, the heating rate of the aerosol-generating substrate 10 can be adjusted by this heating method, thereby improving the user's inhalation sensation.

[0104] In some embodiments, referring to Figure 35, all of the passageways 10c are airway grooves 10b, i.e., in such embodiments, there are no airway holes 10a.

[0105] In some other embodiments, referring to FIGS. 9-16 and 22-32, all of the passageways 10c are airway holes 10a, ie, in such embodiments, there are no airway grooves 10b.

[0106] In still other embodiments, referring to Figures 17 to 21, some of all the passages 10c are airway grooves 10b and other parts are airway holes 10a, i.e., in such embodiments, both airway holes 10a and airway grooves 10b are present.

[0107] The shape of the airway hole 10a is not limited, but for example, in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross-sectional shape of the airway hole 10a includes at least one of a circle, an ellipse, a track, a polygon, and a sector.

[0108] Here, the track shape refers to a shape similar to an athletics track, and is formed by two semicircles and two parallel straight lines connected alternately.

[0109] It should be noted that when there are multiple airway stomas 10a, the cross-sectional shapes of each airway stoma 10a may be identical, or some of the airway stomas 10a may have the same cross-sectional shape while some of the airway stomas 10a have different cross-sectional shapes. For example, in some embodiments, the cross-sectional shapes of all of the airway stomas 10a may be circular, oval, triangular, rectangular, etc. In other embodiments, some of the airway stomas 10a may be triangular and some of the airway stomas 10a may be circular, etc.

[0110] For example, the number of airway holes 10a is multiple, and each airway hole 10a has the same shape and size. For example, all of the airway holes 10a are equilateral triangles, and the sides of all of the equilateral triangles have the same length. As another example, all of the airway holes 10a are circles with the same radius. In this way, each of the airway holes 10a of the aerosol-generating substrate 10 can be molded using the same mold, thereby reducing manufacturing costs.

[0111] In an embodiment in which there are a plurality of airway holes 10a, the arrangement of the airway holes 10a is not limited.

[0112] For example, all the airway holes 10a may be arranged in a matrix, a ring, a square, or the like.

[0113] It should be noted that in the examples of the present application, the structures shown in Figures 17 to 34 do not limit the relative size relationship between the airway holes 10a and the aerosol-generating substrate 10. The airway holes 10a in Figures 17 to 34 are shown only to more clearly show the arrangement relationship of the airway holes 10a, and do not specify their specific sizes.

[0114] 10, 11, and 16 to 18, in an embodiment in which the cross section of the heating element insertion hole 10d is longitudinal, the heating element insertion hole 10d is located on the central axis of the aerosol-generating substrate 10, and the airway holes 10a are distributed symmetrically with respect to the heating element insertion hole 10d in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10. In this embodiment, the heating element insertion hole 10d having a longitudinal cross section effectively increases the heating area of ​​the medium, improving the overall heating speed and heating uniformity of the medium and reducing the user's waiting time.

[0115] 12 to 15 and 23 to 29, in an embodiment in which the heating element insertion holes 10d are columnar holes, the heating element insertion holes 10d are located on the central axis of the aerosol-generating substrate 10, and the airway holes 10a are distributed symmetrically about the origin with respect to the heating element insertion holes 10d in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10. As a result, the distances from the heating element insertion holes to adjacent airway holes 10a are the same, satisfying the heating rate (the distances from the heating element 20 are the same, and the aerosol can be easily released from the airway holes 10a). At the same time, the matrix-like arrangement allows the heating rate of the entire medium to be adjusted, resulting in good heating consistency.

[0116] The arrangement of the airway holes 10a is not limited. It should be noted that in a cross section perpendicular to the longitudinal direction of the aerosol substrate, all of the airway holes 10a may be uniformly or non-uniformly distributed.

[0117] It should be noted that the "uniform distribution" of the airway holes 10a includes a matrix-like or concentric distribution of the airway holes 10a, i.e., a uniform arrangement of the airway holes 10a. It should be understood that the airway holes 10a may not be uniform across the cross-section of the aerosol-generating substrate 10; that is, the airway holes 10a may be uniformly distributed, but may not divide the entire aerosol-generating substrate 10 equally. For example, if the aerosol-generating substrate 10 has a circular cross-section, the matrix-like distribution of the airway holes 10a may not be uniformly distributed across the circular cross-section.

[0118] 16-25 and 30-32, all the airway holes 10a are distributed on multiple trajectories, where the airway holes 10a on a single trajectory line are linearly arranged along a first direction Z1, and multiple trajectories are arranged along a second direction Z2, where the first direction Z1 and the second direction Z2 are not parallel. The first direction Z1 and the second direction Z2 form a planar two-dimensional coordinate system, and the first direction Z1 and the second direction Z2 can define the planar arrangement of the airway holes 10a. That is, the airway holes 10a are arranged regularly, which makes it convenient to process each airway hole 10a according to a predetermined arrangement rule during the molding process.

[0119] For example, the airway holes 10a in a row are arranged at equal intervals. Here, "equally spaced" means that the distance between the centers of two adjacent airway holes 10a is equal. In this manner, the shape and size of the medium wall between two adjacent airway holes 10a are approximately the same. This improves the uniformity of the aerosol emitted from the aerosol-generating substrate 10 during the heating and inhalation process, which is beneficial for the uniformity of aerosol delivery and heating, and also improves the user's inhalation sensation.

[0120] It should be noted that the first direction Z1 may be a straight line or a curved line, and the second direction Z2 may be a straight line or a curved line.

[0121] 23, in some embodiments, the airway holes 10a on a single trajectory line are arranged along a circumferential direction around the center of the aerosol-generating substrate 10, and the multiple trajectory lines are arranged in a concentric circular pattern along the radial direction of the aerosol-generating substrate 10. That is, the first direction Z1 is a circumferential direction around the center of the smoke-generating medium segment, and the second direction Z2 is a radial direction. The airway holes 10a are arranged in a concentric circular pattern.

[0122] For example, when the first direction and the second direction are linear directions perpendicular to each other, the distance between two adjacent airway holes 10a on a single locus line is equal to the distance between the two adjacent locus lines, as shown in Figures 24 and 25. In this way, the thickness of the medium wall between any two adjacent airway holes 10a is the same, which is convenient for uniform heating and uniform aerosol release.

[0123] 24 and 25, in some embodiments, the airway holes are distributed in a matrix. Specifically, the matrix distribution refers to an N*M total arrangement, where N represents the number of airway holes 10a on a single trajectory line, M represents the number of trajectory lines, and N and M may be the same or different.

[0124] For example, in some other embodiments, referring to FIGS. 16 and 17, the distribution of the airway holes 10a is a distribution after omitting the apex angle position based on a matrix distribution.

[0125] In one embodiment, the airway holes 10a on a single trajectory line are arranged in an overlapping arrangement, meaning that the airway holes 10a in the same row are identical. The diameter of the airway holes 10a on each trajectory line may gradually increase along the radial outward direction of the aerosol-generating substrate 10. That is, the diameters of the airway holes 10a on different trajectory lines are different, and the diameters of the airway holes 10a increase the farther from the center of the aerosol-generating substrate 10. For example, referring to FIG. 30 , taking a plurality of trajectory lines arranged in a circular pattern as an example, the diameter of each airway hole 10a may gradually increase from the first trajectory line close to the center of the aerosol-generating substrate 10 to the last trajectory line farther from the center of the aerosol-generating substrate 10. Of course, in other embodiments, the airway holes 10a may also be arranged in a matrix, with the diameter of the airway holes 10a gradually increasing along each trajectory line radially outward of the aerosol-generating substrate 10.

[0126] In one embodiment, the airway holes 10a on a single trajectory line are arranged in an overlapping manner, and the distance between the airway holes 10a on adjacent two trajectory lines gradually decreases along the radial outward direction of the aerosol-generating substrate 10. This means that the thickness of the partition wall between the airway holes 10a on adjacent two trajectory lines gradually decreases. That is, the multiple trajectory lines are not arranged at equal intervals, and the thickness of the partition wall between adjacent two trajectory lines decreases the farther from the center of the aerosol-generating substrate 10. For example, in the case of multiple trajectory lines arranged in a circular pattern, the thickness of the partition wall between the airway holes 10a on adjacent two trajectory lines gradually decreases from the first trajectory line closest to the center of the aerosol-generating substrate 10 to the last trajectory line farthest from the center of the aerosol-generating substrate 10. Of course, in other embodiments, each airway hole 10a may also be arranged in a matrix, with the thickness of the partition wall between two adjacent airway holes 10a on a trajectory line decreasing along the radially outward direction of the aerosol-generating substrate 10.

[0127] For aerosol-generating substrates 10 in which the pore size of the airway holes 10a increases the farther from the center of the aerosol-generating substrate 10, and for aerosol-generating substrates 10 in which the thickness of the partition wall between two adjacent airway holes 10a on the trajectory line decreases the farther from the center of the aerosol-generating substrate 10, the mass per unit volume of the aerosol-generating substrate 10 increases the closer to the center of the aerosol-generating substrate 10. When central heating is applied, the time required for heat conduction from the inside to the outside is longer, thereby extending the time for heating the outer wall of the aerosol-generating substrate 10 (for a given amount of heat supplied to the aerosol-generating substrate 10, the larger the mass of the substrate, the longer it takes to heat up to the set temperature). This improves the uniformity of aerosol emission from the aerosol-generating substrate 10, increases the inhalation time and number of inhalations, while maintaining the consistency of aerosol emission and providing the user with a comfortable inhalation experience.

[0128] In some other embodiments, the airway holes 10a on a single trajectory are arranged in an overlapping pattern, and the diameter of the pores on the outermost trajectory, which is located away from the center of the aerosol-generating substrate 10, is larger than the diameter of the pores on the innermost trajectory along the radial direction of the aerosol-generating substrate 10. That is, only the pore diameter of the airway holes 10a on the outermost trajectory is enlarged, i.e., the pore diameter of the airway holes 10a on the trajectory farthest from the center of the aerosol-generating substrate 10 is enlarged, while the pore diameters of the airway holes 10a on the other trajectories, except for the pore diameter of the airway holes 10a on the outermost trajectory, remain the same. When the aerosol-generating substrate 10 of this embodiment is heated from the center, the time required for heat conduction from the inside to the outside is extended, which can extend the heating time of the outer wall of the aerosol-generating substrate 10. This improves the uniformity of aerosol emission from the aerosol-generating substrate 10, increases the inhalation time and the number of inhalations, while maintaining the consistency of aerosol emission and providing a comfortable inhalation experience to the user.

[0129] In some other embodiments, referring to Figures 16, 17, 24, and 25, a single trajectory line is linearly arranged along a first direction Z1, and multiple trajectory lines are parallelly arranged along a second direction Z2, with the first direction Z1 and the second direction Z2 being perpendicular. As shown in Figures 16 and 17, a single trajectory line is linearly arranged along the first direction Z1, and multiple trajectory lines are parallelly arranged along the second direction Z2, forming multiple rows of airway holes 10a arranged in a non-matrix pattern. As shown in Figure 25, the multiple trajectory lines are arranged in a matrix pattern.

[0130] In a plane perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the contour shape of the aerosol-generating substrate 10 is not limited, and may be, for example, a circle, an ellipse, a polygon, etc., but is not limited thereto.

[0131] For illustrative purposes, the embodiments of the present application will be described with reference to a cylindrical aerosol-generating substrate 10, i.e., the cross-sectional profile of the aerosol-generating substrate 10 is approximately circular. The cylindrical aerosol-generating substrate 10 has a regular outer shape, which can reduce the difficulty of the manufacturing process.

[0132] In some embodiments, the airway hole 10a in the embodiments of the present application extends along a straight line.

[0133] In some other embodiments, the airway hole 10a extends along a curve, for example, in a spiral shape. For example, referring to FIGS. 32 to 34, the passage 10c includes a plurality of spiral airways, which are provided inside the aerosol-generating substrate 10. At least a portion of the spiral airways along their extension direction is curved with a non-zero curvature, meaning that at least a portion of the spiral airways along their extension direction is not a straight line with a non-zero curvature. For example, along their extension direction, the spiral airways may have both curved segments with a non-zero curvature and straight segments with a non-zero curvature, or may have only curved segments with a non-zero curvature and no straight segments with a non-zero curvature. In other words, the spiral airways do not have to extend along a straight line from the start point to the end point along their extension direction.

[0134] The spiral airway increases the surface area of ​​the aerosol-generating substrate 10 (the sidewalls of the spiral airway constitute part of the surface of the aerosol-generating substrate 10), allowing heat from the aerosol-generating substrate 10 to enter the interior of the aerosol-generating substrate 10 through its surface. This improves heating efficiency compared to conventional smoke-generating segment materials that conduct heat directly from the interior without any airway. Furthermore, for a given aerosol suction capacity, the spiral airway extends the airflow path, increasing the airflow velocity within the aerosol-generating substrate 10, thereby enhancing the impact force of the airflow and uniformly mixing the aerosol. This further improves the extraction efficiency and uniformity of the aerosol within the aerosol-generating substrate 10, improving the user's inhalation experience. In other words, compared to conventional smoke-generating segment materials, the aerosol-generating substrate 10 of the present application provides an improved user experience.

[0135] For example, the number of spiral air passages is usually two or more, and they are provided symmetrically around the heating element insertion hole 10d.

[0136] 26 to 29, in some other embodiments, the passage 10c includes a plurality of airway holes 10a, which are provided inside the aerosol-generating substrate 10. All of the airway holes 10a are arranged in a row, i.e., the airway holes 10a are linearly arranged along the first direction Z1, which may be a straight line or a curved line. That is, the airway holes 10a are regularly arranged, which makes it convenient to process the airway holes 10a according to a predetermined arrangement rule during the molding process. For example, the center line of the heating element insertion hole 10d along its extension direction overlaps with the central axis of the aerosol-generating substrate 10 along its length, and the airway holes 10a are arranged in a circumferential direction surrounding the center of the heating element insertion hole 10d.

[0137] 26 to 29, in this embodiment, the airway holes 10a are fan-shaped annular. The airway holes 10a are uniformly arranged around the circumferential direction of the heating element 20. For example, when there are three airway holes 10a, the central angle corresponding to each airway hole 10a is 120°. When there are four airway holes 10a, the central angle corresponding to each airway hole 10a is 90°. When there are six airway holes 10a, the central angle corresponding to each airway hole 10a is 60°.

[0138] In this embodiment, there is a radial partition wall between two adjacent airway holes 10a, and the thickness of a radial partition wall at any location may be the same or different.

[0139] In this embodiment, the fan-shaped airway vent 10a effectively increases the flow rate of fresh air in the airway vent 10a, reduces the proportion of aerosol in the airflow, and lowers the temperature of the extracted aerosol, reducing the waste of aerosol when the user inhales intermittently, thus improving the utilization rate of the aerosol.

[0140] The specific structure of the heating element 20 is not limited.

[0141] For example, in some embodiments, the heating element 20 includes an electromagnetic induction unit for inducing a change in an external magnetic field to generate heat. In some embodiments, the electric energy output unit is an inductance coil. In some embodiments, energy is transmitted between the electric energy output unit and the heating element 20 in a contactless manner.

[0142] The specific material of the electromagnetic induction portion is not limited, and may be, for example, metal, conductive ceramic, or other material.

[0143] It should be noted that the arrangement of the inductance coil is not limited, and it may be arranged on the circumferential side wall of the heating chamber 200a or on the bottom wall of the heating chamber 200a, and is not limited here.

[0144] In the above-described embodiments, the structure of the heating element 20 is not limited. For example, in some embodiments, the entire heating element 20 is made of a metal material or conductive ceramics, i.e., the entire heating element 20 is an electromagnetic induction part. In other embodiments, the heating element 20 includes an insulating substrate and an electromagnetic induction part, and the electromagnetic induction part is layered and provided on the surface of the insulating substrate.

[0145] In some other embodiments, the heating element 20 includes an electric heating unit and a contact unit electrically connected to the electric heating unit, and the contact unit is used to contact an external power terminal to energize the electric heating unit to generate heat. In these embodiments, the electric energy output unit includes two positive power terminals and one negative power terminal, and the contact unit includes a positive contact and a negative contact, with the positive contact contacting the positive power terminal and the negative contact contacting the negative power terminal, thereby connecting the electric heating unit to a circuit. After the aerosol generating device 200 is activated, the heating element 20 receives energy and begins to heat the aerosol-generating product 100 contained in the aerosol generating device 200. In these embodiments, electrical energy is transmitted between the electric energy output unit and the heating element 20 via contact.

[0146] The specific material of the electric heating portion is not limited, and may be, for example, metal, conductive ceramic, or other material.

[0147] In the above-described embodiments, there is no limitation on the structure of the heating element 20. For example, in some embodiments, the entire heating element 20 is made of a metal material or conductive ceramics, and in other embodiments, the heating element 20 further includes an insulating base, and the above-described electric heating portion is provided on the insulating base.

[0148] In one specific embodiment, as shown in FIGS. 3 and 4 , the cross section of the heating element insertion hole 10d perpendicular to the longitudinal direction of the aerosol-generating substrate 10 is elongated or circular, and a sheet-shaped or solid cylindrical heating element 20 is correspondingly provided in the aerosol-generating device 200. Sheet-shaped and solid cylindrical heating elements have excellent heating speeds, convenient operation (e.g., easy insertion into the heating element insertion hole 10d), and relatively low production costs. The heating element 20 is inserted into the heating element insertion hole 10d inside the aerosol-generating substrate 10 to heat and bake the aerosol-generating substrate 10 from the inside out. The heating method may be resistance heating. For example, a resistive film may be coated / printed on the outside of the heating element 20, and the aerosol-generating substrate 10 may be heated and baked by resistance heating when powered on. In another embodiment, the heating element 20 may be heated and baked by infrared radiation when powered on. In this case, the outer surface of the heating element 20 may be coated with an infrared material.

[0149] In another specific embodiment, as shown in Figure 3 below, in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross section of the heating element insertion hole 10d is circular, and a hollow tubular heating element 20 is correspondingly provided in the aerosol-generating device 200, which increases the aerosol collection path (allowing airflow to flow from below the heating element into the aerosol-generating substrate 10) and improves the utilization rate of the aerosol-generating substrate 10. The hollow tubular heating element 20 reduces energy loss (the heating element has a low mass and low loss), improving the single-cycle life of the equipment and improving the consumer experience. The heating element 20 is inserted into the heating element insertion hole 10d inside the aerosol-generating substrate 10 and heats and bakes the aerosol-generating substrate 10 from the inside out. For example, if the heating method is electromagnetic heating, the aerosol generating device 200 has a power supply, a control circuit, and a coil connected to the control circuit. When electricity is applied to the coil, a magnetic field is generated, and the hollow tubular heating element 20 provided in the aerosol generating device 200 generates heat under the action of the magnetic field, thereby heating the aerosol generating product 100.

[0150] In yet another specific embodiment, as shown in FIG. 2 below, in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the cross section of the heating element insertion hole 10d is annular, and one end of the heating element insertion hole 10d near the bottom of the aerosol-generating substrate 10 is open, which facilitates insertion of the heating element 20 into the aerosol-generating device 200. The other end of the heating element insertion hole 10d near the filtering segment is closed, which maintains the integrity of the medium. The aerosol-generating device 200 is correspondingly provided with a hollow tubular heating element 20, which provides a relatively large heat transfer area without reducing the mass (total aerosol content) of the aerosol-generating substrate 10, thereby increasing the heating uniformity of the aerosol-generating substrate 10 and improving the consumer's inhalation experience. The heating element 20 is inserted into the heating element insertion hole 10d inside the aerosol-generating substrate 10 and heats and bakes the aerosol-generating substrate 10 from the inside out.

[0151] Eight specific examples will be briefly introduced below with reference to the drawings.

[0152] First Example Referring to Figs. 10 and 11, in this embodiment, the number of the heating element insertion hole 10d is one.

[0153] 10, in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate 10, the heating element insertion hole 10d has a longitudinal cross section and is provided along the central axis of the aerosol-generating substrate 10. Correspondingly, the heating element 20 is in the form of a flat sheet.

[0154] Referring to Figure 11, in this embodiment, the structure of the aerosol-generating substrate 10 is almost the same as that of the first embodiment, but the main difference is that in this embodiment, chamfers are provided at the corners of the elongated heating element insertion hole 10d to make it easier to insert the heating element 20 into the heating element insertion hole 10d.

[0155] In this embodiment, the aerosol-generating substrate 10 does not have any passages 10c. It will be appreciated that in other embodiments, the aerosol-generating substrate 10 may have one or more passages 10c.

[0156] In this embodiment, the heating element insertion hole 10d is machined during the manufacturing of the aerosol-generating substrate 10. When in use, the heating element 20 is simply inserted into the heating element insertion hole 10d. When the heating element 20 is inserted into the heating element insertion hole 10d, the heating element 20 exerts little or no pressure on the surrounding structure around the heating element insertion hole 10d. This allows the aerosol-generating substrate 10 to maintain a relatively uniform substrate density, and the outer coating layer 40, which covers the circumferential exterior of the aerosol-generating substrate 10, is less likely to deform or burst. Furthermore, when the aerosol-generating substrate 10 is separated from the aerosol-generating device 200 after heating is completed, the aerosol-generating substrate 10 is less likely to adhere to the heating element or fall into the heating chamber 200a, thereby contaminating the heating chamber 200a. This reduces the user's cleaning workload and improves the user experience.

[0157] Second Example 12 to 15, in this embodiment, the structure of the aerosol-generating substrate 10 is almost the same as that of the first embodiment, but the main difference is that in this embodiment, the heating element insertion hole 10d is a columnar hole.

[0158] In this embodiment, the aerosol-generating substrate 10 does not have any passages 10c. It will be appreciated that in other embodiments, the aerosol-generating substrate 10 may have one or more passages 10c.

[0159] Third Example Referring to Figures 16, 22 and 30, in this embodiment, the structure of the aerosol-generating substrate 10 is almost the same as that of the first embodiment, but the main difference is that in this embodiment, the passage 10c includes multiple airway holes 10a.

[0160] All the airway holes 10 a are arranged mirror-symmetrically with respect to the heating element 20 .

[0161] The airway hole 10a extends along a straight line.

[0162] In the arrangement of the airway holes 10a shown in Figure 16, both the first direction Z1 and the second direction Z2 are straight lines. However, the number of airway holes 10a in at least two rows of airway holes 10a is different, and the airway holes 10a shown in Figures 22 and 30 are arranged in concentric circles.

[0163] In this embodiment, the outer circumferential surface of the aerosol substrate does not include any airway grooves 10b, although it will be appreciated that in other embodiments, the outer circumferential surface of the aerosol substrate may include one or more airway grooves 10b.

[0164] Fourth Example Referring to Figures 17 and 18, in this embodiment, the structure of the aerosol-generating substrate 10 is almost the same as that of the third embodiment, but the main difference is that in this embodiment, airway grooves 10b are provided on the circumferential outer surface of the aerosol substrate.

[0165] All the airway holes 10 a are arranged mirror-symmetrically with respect to the heating element 20 .

[0166] The airway hole 10a extends along a straight line.

[0167] In the arrangement of the airway holes 10a shown in Figure 17, both the first direction Z1 and the second direction Z2 are straight lines, but the number of airway holes 10a in at least two rows of airway holes 10a is different, and the airway holes 10a shown in Figure 18 are arranged in a concentric circle pattern.

[0168] Fifth Example Referring to Figures 24 and 25, in this embodiment, the structure of the aerosol-generating substrate 10 is almost the same as that of the third embodiment, but the main difference is that in the arrangement of the airway holes 10a, the first direction Z1 and the second direction Z2 are perpendicular.

[0169] The airway hole 10a extends along a straight line.

[0170] In the arrangement of the air duct holes 10a, as shown in Figure 24, if the number of single trajectory lines is odd, the heating element insertion hole 10d overlaps with the central air duct hole 10a, and as shown in Figure 25, if the number of single trajectory lines is even, the heating element insertion hole 10d does not overlap with the central air duct hole 10a.

[0171] In this embodiment, the outer circumferential surface of the aerosol substrate does not include any airway grooves 10b, although it will be appreciated that in other embodiments, the outer circumferential surface of the aerosol substrate may include one or more airway grooves 10b.

[0172] Sixth Example Referring to FIGS. 27 to 29, in this embodiment, the heating element insertion hole 10d is a columnar hole and is located on the central axis of the aerosol substrate.

[0173] The airway holes 10a are fan-shaped and are uniformly arranged around the circumference of the heating element 20. For example, when there are three airway holes 10a, the central angle corresponding to each airway hole 10a is 120°, when there are four airway holes 10a, the central angle corresponding to each airway hole 10a is 90°, and when there are six airway holes 10a, the central angle corresponding to each airway hole 10a is 60°.

[0174] In this embodiment, there is a radial partition wall between two adjacent airway holes 10a, and the thickness of a radial partition wall at any location may be the same or different.

[0175] In this embodiment, the fan-shaped airway vent 10a effectively increases the flow rate of fresh air in the airway vent 10a, reduces the proportion of aerosol in the airflow, and lowers the temperature of the extracted aerosol, reducing the waste of aerosol when the user inhales intermittently, thus improving the utilization rate of the aerosol.

[0176] Seventh Example 26, in this embodiment, an arc-shaped partition wall is added to the airway hole 10a in the sixth embodiment, dividing the single airway hole 10a in the sixth embodiment into multiple airway holes 10a arranged along the radial direction. The airway holes 10a have smaller volumes and are more numerous, and the multiple airway holes 10a are distributed in a spider web-like pattern.

[0177] The thickness of the arcuate partition wall is the same as the thickness of the radial partition wall, although in other embodiments the thicknesses may be different.

[0178] The thickness of each layer of the arc-shaped partition wall is the same along the radial direction. In other embodiments, the thickness of each layer of the arc-shaped partition wall may vary. For example, the thickness may gradually increase or decrease along the radially inward direction.

[0179] The width of the airway hole 10a in each layer along the radial direction is the same. In other embodiments, the thickness of each layer of the arc-shaped partition wall may also be different. For example, the width may gradually increase or decrease along the radially inward direction.

[0180] In this embodiment, the airways 10a are not in communication with one another, ie, airflow in one airway 10a does not flow into another airway 10a.

[0181] In this embodiment, the radial partition walls of the airway holes 10a in each layer are aligned, that is, the radial partition walls are located on the same straight line.

[0182] Eighth Example 32 to 34, the airway hole 10a extends in a spiral shape, i.e., it is a spiral airway. The spiral airway helps to improve the aerosol extraction efficiency (under the premise of the same inhalation resistance, increasing the path length of the gas in the spiral airway increases the airflow velocity and the contact area between the airflow and the hole wall of the airway hole 10a, thereby increasing the aerosol extraction efficiency).

[0183] In the description of the present application, references such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary" mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In the present application, exemplary references to the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, if not mutually inconsistent, those skilled in the art may combine different embodiments or examples and features of different embodiments or examples described in the present application.

[0184] The above description is only a preferred embodiment of the present application, and is not intended to limit the present application, and those skilled in the art may have various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application are all included in the protection scope of the present application.

Claims

1. An aerosol-generating substrate, the aerosol-generating substrate being cylindrical and having a heating element insertion hole therein, the heating element insertion hole extending along the length of the aerosol-generating substrate and penetrating at least one end of the aerosol-generating substrate along the length of the substrate.

2. the aerosol-generating substrate has a passageway extending along the length of the aerosol-generating substrate and penetrating at least one end of the aerosol-generating substrate along the length of the substrate; 2. The aerosol-generating substrate of claim 1.

3. the heating element insertion hole is one in number and extends along the length of the aerosol-generating substrate, and the heating element insertion hole is provided on the central axis of the aerosol-generating substrate; 3. The aerosol-generating substrate of claim 2.

4. the passage includes a plurality of airway holes, the plurality of airway holes are provided inside the aerosol-generating substrate, the cross section of the heating element insertion hole is elongated in a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate, and the airway holes are distributed symmetrically with respect to the heating element insertion hole; 4. The aerosol-generating substrate of claim 3.

5. the passage includes a plurality of airway holes, the plurality of airway holes are provided inside the aerosol-generating substrate, the heating element insertion holes are columnar holes, and the airway holes are distributed symmetrically about the origin with respect to the heating element insertion holes in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate; 4. The aerosol-generating substrate of claim 3.

6. the passage includes a plurality of airway holes, the plurality of airway holes are provided inside the aerosol-generating substrate, a center line along the extension direction of the heating element insertion hole overlaps with a central axis along the length direction of the aerosol-generating substrate, and each of the airway holes is arranged in a circumferential direction surrounding the center of the heating element insertion hole.

4. The aerosol-generating substrate of claim 3.

7. the passageway includes a plurality of airway holes, the plurality of airway holes being disposed within the aerosol-generating substrate, and all of the airway holes being distributed on a plurality of locus lines, wherein each of the airway holes on a single locus line is linearly arranged along a first direction, and the plurality of locus lines are arranged along a second direction, and the first direction and the second direction are not parallel to each other; 4. The aerosol-generating substrate of claim 3.

8. The airway holes on a single locus line are linearly arranged along the first direction, and the plurality of locus lines are arranged in parallel along the second direction, and the first direction and the second direction are perpendicular to each other.

8. The aerosol-generating substrate of claim 7.

9. The distance between two adjacent airway holes on a single locus line is equal to the distance between two adjacent locus lines; 9. The aerosol-generating substrate of claim 8.

10. the airway holes on a single locus line are arranged in a circumferential direction surrounding the center of the aerosol-generating substrate, and the plurality of locus lines are arranged in concentric circles along a radial direction of the aerosol-generating substrate.

8. The aerosol-generating substrate of claim 7.

11. The airway holes on a single trajectory line are arranged in an overlapping arrangement, and extend radially outward from the aerosol-generating substrate. The airway opening diameter gradually increases along each trajectory line, and / or the spacing between the airway holes on two adjacent trajectory lines gradually decreases; 8. The aerosol-generating substrate of claim 7.

12. the aerosol-generating substrate is of monolithic construction; An aerosol-forming substrate according to any one of claims 1 to 11.

13. the heating element insertion hole penetrates through both opposing ends of the aerosol-generating substrate in the longitudinal direction, and the aerosol-generating substrate has a circular cross-sectional shape in a plane perpendicular to the longitudinal direction of the aerosol-generating substrate; An aerosol-forming substrate according to any one of claims 1 to 11.

14. the passage includes a plurality of spiral airways, the spiral airways are provided inside the aerosol-generating substrate, and at least a portion of the spiral airways along their extending direction is curved with a non-zero curvature. An aerosol-forming substrate according to any one of claims 2 to 11.

15. the passageway includes an airway groove, the airway groove being provided on the circumferential surface of the aerosol-generating substrate; An aerosol-forming substrate according to any one of claims 2 to 11.

16. The aerosol-generating substrate is a particle conjugate, and pores are formed between the particles of the particle conjugate, and a plurality of the pores are connected to form micro-airways that communicate with the passage and / or the heating element insertion hole, and the cross-sectional area of ​​the pores is 0.7 nm ２ ~710μm ２ Or the hydraulic diameter of the pores is 10 nm to 30 μm; An aerosol-forming substrate according to any one of claims 2 to 11.

17. In a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate, the cross-sectional shape of the heating element insertion hole is elongated, circular, elliptical, annular, arc-shaped, sawtooth, or polygonal. The aerosol-forming substrate according to any one of claims 1 to 3.

18. In a cross section perpendicular to the longitudinal direction of the aerosol-generating substrate, the cross section of the heating element insertion hole has a longitudinal shape, and the length of the cross section is 1 mm to 40 mm; and / or The width of the cross section is 0.05 mm to 3 mm. The aerosol-forming substrate according to any one of claims 1 to 3.

19. The cross-sectional shape of the heat generating element insertion hole is circular, and the hole diameter of the heat generating element insertion hole is 0.1 mm to 3 mm. The aerosol-forming substrate according to any one of claims 1 to 3.

20. The heat generating element insertion hole is a columnar hole, and the cross-sectional area of ​​the heat generating element insertion hole is 0.01 mm ２ ~7.1mm ２ That is, The aerosol-forming substrate according to any one of claims 1 to 3.

21. 1. An aerosol-generating product comprising: An aerosol-forming substrate comprising the aerosol-forming substrate of any one of claims 1 to 20, a functional segment, and an outer coating layer, the functional segment is provided at one end along the length of the aerosol-generating substrate and includes at least a filtering segment for filtering the aerosol; The outer coating layer is applied to the circumferential exterior of the functional segment and the aerosol-generating substrate.

22. The functional segment further includes a temperature-reducing segment, the temperature-reducing segment being located between the filtration segment and the aerosol-generating substrate.

22. The aerosol-generating product of claim 21.

23. An aerosol generating device used in conjunction with the aerosol generating product described in claim 21 or 22, the aerosol generating device including a heat generating component, the heat generating component including a heating element, the heating element being inserted into the heating element insertion hole and used to heat the aerosol generating substrate and generate an aerosol.

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