Aerosol generating product

Abstract

An aerosol generating product, comprising: an aerosol generating substrate section (10) and a functional section (20) provided at one end of the aerosol generating substrate section (10). The functional section (20) at least comprises a cooling section (21) having a variable-diameter channel (21a). The variable-diameter channel (21a) extends in a direction away from the aerosol generating substrate section (10), and in the extension direction of the variable-diameter channel (21a), at least one position of the variable-diameter channel (21a) has a cross-sectional dimension different from those of other positions. According to the aerosol generating product, the heat of an aerosol can be better transferred by means of the inner side wall of the variable-diameter channel (21a), thereby improving the cooling effect.

Description

An aerosol generating product

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202310927422.2 and application date of July 26, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the technical field of smoking products, and in particular to an aerosol generating product. Background Art

[0004] Aerosol-generating products generally generate aerosols by heating without burning. Specifically, aerosol-generating products are heated by an external heat source to a degree just sufficient to emit a fragrance. Aerosol-generating products do not burn, but instead load an atomizer and release the atomizer by heating when in use to form smoke.

[0005] The heating temperature of aerosol-generating products during the heating process is relatively high, so the temperature of the generated aerosol is also relatively high. In order to prevent users from "burning their mouths" when inhaling, aerosol-generating products generally reduce the temperature of the aerosol by designing a cooling structure.

[0006] However, in the related art, the cooling effect of the cooling structure is relatively poor, which affects the user's smoking experience.

[0007] Summary of the Invention

[0008] In view of this, embodiments of the present application hope to provide an aerosol generating product that can improve the cooling effect.

[0009] To achieve the above objectives, the present invention provides an aerosol-generating article, comprising:

[0010] aerosol-generating matrix segment;

[0011] A functional segment is arranged at one end of the aerosol generating matrix segment, and the functional segment includes at least a cooling segment having a variable diameter channel, the variable diameter channel extends in a direction away from the aerosol generating matrix segment, and along the extension direction of the variable diameter channel, the cross-sectional dimensions at at least one position of the variable diameter channel are different from the cross-sectional dimensions at other positions.

[0012] In one embodiment, the variable diameter channel is arranged inside the temperature reduction section.

[0013] In one embodiment, the variable diameter channel is provided on the outer side wall of the cooling section.

[0014] In one embodiment, at least a portion of the variable diameter channel is a variable diameter region whose cross-sectional size gradually decreases or increases along the extension direction.

[0015] In one embodiment, the inner side wall of the variable diameter channel located in the variable diameter area is in a curved shape that bends inwardly of the variable diameter channel.

[0016] In one embodiment, the aerosol generating product has a cavity located on the outer peripheral side of the cooling section, and the cooling section has an airway groove, which penetrates the side wall of the variable diameter channel located in the variable diameter area to connect the variable diameter area with the cavity.

[0017] In one embodiment, the airway groove surrounds the circumference of the variable diameter channel.

[0018] In one embodiment, the variable diameter channel has an air flow inlet at one end close to the aerosol generating matrix segment, and has an air flow outlet at one end of the variable diameter channel away from the aerosol generating matrix segment, and the cross-sectional dimension of one of the air flow inlet and the air flow outlet is the maximum cross-sectional dimension of the variable diameter channel, and the cross-sectional dimension of the other is the minimum cross-sectional dimension of the variable diameter channel.

[0019] In one embodiment, the cross-sectional size of the variable-diameter channel gradually decreases or increases from the airflow inlet to the airflow outlet.

[0020] In one embodiment, along the extension direction, the variable diameter channel has an initial section closest to the aerosol generating substrate section and a final section farthest from the aerosol generating substrate section, the initial section has the airflow inlet, and the final section has the airflow outlet.

[0021] In one embodiment, the initial segment and the final segment are both equal-diameter structures, the cross-sectional dimension of one of the initial segment and the final segment is the maximum cross-sectional dimension, and the cross-sectional dimension of the other one is the minimum cross-sectional dimension.

[0022] In one embodiment, the cross-sectional area ratio of the maximum cross-sectional dimension to the minimum cross-sectional dimension is 2-5:1-2.

[0023] In one embodiment, along the extension direction, the variable diameter channel has an initial section closest to the aerosol generating matrix section and a terminal section farthest from the aerosol generating matrix section; the initial section is a variable diameter structure whose cross-sectional size gradually decreases along the extension direction, and the terminal section is a constant diameter structure, and the maximum value of the cross-sectional size of the initial section is greater than the cross-sectional size of the terminal section.

[0024] In one embodiment, along the extension direction, the variable diameter channel has an initial section closest to the aerosol generating matrix section and a terminal section farthest from the aerosol generating matrix section; the initial section is a constant diameter structure, and the terminal section is a variable diameter structure whose cross-sectional size gradually increases along the extension direction, and the cross-sectional size of the initial section is smaller than the maximum cross-sectional size of the terminal section.

[0025] In one embodiment, along the extension direction, the variable diameter channel has an initial segment closest to the aerosol generating matrix segment and a final segment farthest from the aerosol generating matrix segment, and the initial segment and the final segment are both variable diameter structures; the cross-sectional dimensions of the initial segment and the cross-sectional dimensions of the final segment gradually decrease along the extension direction, and the maximum value of the cross-sectional dimension of the initial segment is greater than the minimum value of the cross-sectional dimension of the final segment.

[0026] In one embodiment, along the extension direction, the variable diameter channel has an initial segment closest to the aerosol generating matrix segment and a final segment farthest from the aerosol generating matrix segment, and the initial segment and the final segment are both variable diameter structures; the cross-sectional dimensions of the initial segment and the cross-sectional dimensions of the final segment gradually increase along the extension direction, and the minimum value of the cross-sectional dimension of the initial segment is smaller than the maximum value of the cross-sectional dimension of the final segment.

[0027] In one embodiment, along the extension direction, the variable diameter channel has an initial section closest to the aerosol generating substrate section, a final section farthest from the aerosol generating substrate section, and an intermediate section located between the initial section and the final section, and the cross-sectional size of the intermediate section is less than or equal to the maximum cross-sectional size and greater than or equal to the minimum cross-sectional size.

[0028] In one embodiment, the cross-sectional dimensions of the variable-diameter channel alternately change along the extending direction.

[0029] In one embodiment, the cross-sectional size of the variable-diameter channel gradually decreases and then gradually increases along the extending direction.

[0030] In one embodiment, the cross-sectional size of the variable-diameter channel gradually increases and then gradually decreases along the extending direction.

[0031] In one embodiment, along the extension direction, the variable diameter channel has at least three equal diameter sections, and the equal diameter sections are alternately arranged according to the size of the cross-sectional dimensions;

[0032] The variable diameter channel further includes a variable diameter section located between two adjacent equal diameter sections, and a cross-sectional dimension of the variable diameter section transitions from one of the two adjacent equal diameter sections to the other.

[0033] In one embodiment, along the extension direction, the variable diameter channel has at least two variable diameter sections and a constant diameter section located between two adjacent variable diameter sections. Among the two adjacent variable diameter sections, the cross-sectional size of one of the variable diameter sections gradually decreases along the extension direction, and the cross-sectional size of the other variable diameter section gradually increases along the extension direction.

[0034] In one embodiment, along the extension direction, at least a portion of the inner sidewall of the variable diameter channel is sinusoidal; the inner sidewall in the sinusoidal waveform has crests and troughs, and the total number of the crests and troughs is 5 to 15.

[0035] In one embodiment, the aerosol-generating substrate segment is an integral structure having at least one air channel therein, wherein the air channel runs through at least one of the two opposite ends of the aerosol-generating substrate segment along the direction of the airflow.

[0036] In one embodiment, the aerosol-generating substrate segment and the functional segment are coaxially arranged cylinders, and the extension direction is the axial direction of the aerosol-generating substrate segment and the functional segment.

[0037] An embodiment of the present application provides an aerosol generating product, which is provided with a cooling section having a variable diameter channel in a functional section. Along the extension direction of the variable diameter channel, the cross-sectional dimensions at at least one position of the variable diameter channel are different from the cross-sectional dimensions at other positions. That is, there will be areas with relatively large cross-sectional dimensions and areas with relatively small cross-sectional dimensions in the variable diameter channel. The flow rate of the aerosol in the area with relatively large cross-sectional dimensions is slower, and the contact time with the inner wall of the variable diameter channel is relatively longer, and the contact area is also relatively larger. The flow rate of the aerosol in the area with relatively small cross-sectional dimensions is faster, and the contact time with the inner wall of the variable diameter channel is relatively shorter, and the contact area is also relatively smaller. That is, in the process of the aerosol flowing along the variable diameter channel, the flow rate of the aerosol will change, and the contact time and contact area of ​​the aerosol with the inner wall at different positions in the variable diameter channel will also change. As a result, the heat of the aerosol can be better transferred through the inner wall of the variable diameter channel, thereby improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a schematic structural diagram of a first aerosol generating article according to an embodiment of the present application;

[0039] FIG2 is a schematic diagram of the structure of the aerosol generating article shown in FIG1 , with the outer wrapping layer omitted;

[0040] FIG3 is a cross-sectional view of the aerosol-generating article shown in FIG1 ;

[0041] FIG4 is a cross-sectional view of the aerosol-generating article shown in FIG1 from another perspective;

[0042] FIG5 is a cross-sectional view of a second aerosol-generating article according to an embodiment of the present application;

[0043] FIG6 is a schematic structural diagram of the cooling section shown in FIG5 ;

[0044] FIG7 is a cross-sectional view of a third aerosol-generating article according to an embodiment of the present application;

[0045] FIG8 is a cross-sectional view of a fourth aerosol-generating article according to an embodiment of the present application;

[0046] FIG9 is a cross-sectional view of a fifth aerosol-generating article according to an embodiment of the present application;

[0047] FIG10 is a cross-sectional view of a sixth aerosol-generating article according to an embodiment of the present application;

[0048] FIG11 is a cross-sectional view of a seventh aerosol-generating article according to an embodiment of the present application;

[0049] FIG12 is a cross-sectional view of an eighth aerosol-generating article according to an embodiment of the present application;

[0050] FIG13 is a cross-sectional view of a ninth aerosol-generating article according to an embodiment of the present application;

[0051] FIG14 is a cross-sectional view of a tenth aerosol-generating article according to an embodiment of the present application;

[0052] FIG15 is a cross-sectional view of an eleventh aerosol-generating article according to an embodiment of the present application;

[0053] FIG16 is a cross-sectional view of a twelfth aerosol-generating article according to an embodiment of the present application;

[0054] FIG17 is a cross-sectional view of a thirteenth aerosol-generating article according to an embodiment of the present application;

[0055] FIG18 is a cross-sectional view of a fourteenth aerosol-generating article according to an embodiment of the present application;

[0056] FIG19 is a cross-sectional view of a fifteenth aerosol-generating article according to an embodiment of the present application;

[0057] FIG20 is a cross-sectional view of a sixteenth aerosol-generating article according to an embodiment of the present application;

[0058] FIG21 is a cross-sectional view of a seventeenth aerosol-generating article according to an embodiment of the present application. DETAILED DESCRIPTION

[0059] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "extension direction" is based on the orientation or positional relationship shown in Figure 4. These orientation terms are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0060] An embodiment of the present application provides an aerosol-generating product, as shown in FIG. 1 to FIG. 21 . The aerosol-generating product includes an aerosol-generating substrate segment 10 and a functional segment 20 .

[0061] The functional segment 20 is arranged at one end of the aerosol generating matrix segment 10. The functional segment 20 includes at least a cooling segment 21 having a variable diameter channel 21a. The variable diameter channel 21a extends in a direction away from the aerosol generating matrix segment 10, and along the extension direction of the variable diameter channel 21a, the cross-sectional dimensions at at least one position of the variable diameter channel 21a are different from the cross-sectional dimensions at other positions.

[0062] The aerosol generating article is used in conjunction with an aerosol generating device having a heating component. Specifically, the heating component heats and atomizes the aerosol generating substrate segment 10 to generate an aerosol for the user to inhale or for use in medicine, beauty, etc.

[0063] There are various heating methods for the heating assembly. Exemplary heating methods include central heating and circumferential heating. Central heating involves inserting the heating assembly into the aerosol-generating substrate segment 10 to heat the aerosol-generating substrate segment 10 from the inside out. Circumferential heating involves placing the heating assembly around the periphery of the aerosol-generating substrate segment 10 to heat the aerosol-generating substrate segment 10 from the outside in. These heating methods may include resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, and the like.

[0064] The specific structure of the aerosol-generating matrix segment 10 is not limited herein. For example, in one embodiment, the aerosol-generating matrix segment 10 can be made of the atomizing medium itself, such as a smoke-flavoring flavoring medium. In other embodiments, the aerosol-generating matrix segment 10 can also include a substrate and an atomizing medium disposed on the substrate. The substrate can be, for example, high-temperature-resistant carbon fiber. The substrate can improve the strength of the aerosol-generating matrix segment 10 while also allowing it to withstand a certain degree of high temperature without generating odor.

[0065] The specific components of the aerosol-generating matrix segment 10 are not limited herein. For example, in one embodiment, the aerosol-generating matrix segment 10 may include plant components, auxiliary components, smoke-generating agent components, adhesive components, and the like.

[0066] In one embodiment, the plant component is one or more combinations of powders formed after crushing tobacco leaf raw materials, tobacco leaf fragments, tobacco stems, tobacco dust, and flavor plants. The plant component is the core source of the flavor of the product.

[0067] Source, endogenous substances in plant ingredients, such as nicotine, enter the human blood through atomization, promoting the production of pituitary gland

[0068] Dopamine, thus obtaining physiological satisfaction.

[0069] In one embodiment, the auxiliary agent may be one or more combinations of inorganic fillers, lubricants, and emulsifiers. Inorganic fillers include one or more combinations of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. Inorganic fillers can provide skeletal support for the plant component and, while also possessing micropores, can increase the porosity of the wall material after the plant component is formed, thereby improving the aerosol release rate.

[0070] Lubricants include one or more of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, and palmitic acid. Lubricants can increase particle flowability, reduce friction between particles, and achieve a more uniform particle density. They can also reduce mold pressure and reduce mold wear.

[0071] Emulsifiers include one or more combinations of polyglycerol fatty acid esters, Tween-80, and polyvinyl alcohol. Emulsifiers can, to a certain extent, slow the loss of flavoring substances during storage, increase their stability, and improve the sensory quality of the product. Emulsifiers (also known as surfactants) can reduce the interfacial tension between the water-soluble and water-insoluble components in a mixed system and form a relatively strong film on the surface of the droplets. Alternatively, due to the charge imparted by the emulsifier, a double layer is formed on the surface of the droplets, preventing the droplets from aggregating and maintaining a uniform emulsion. Emulsifying and homogenizing two immiscible components can improve the consistency of product quality.

[0072] The function of the smoke-generating agent component is to generate a large amount of vapor when heated, thereby increasing the amount of smoke produced by the smoking article. In one embodiment, the smoke-generating agent may include, for example, a monohydric alcohol (such as menthol); a polyhydric alcohol (such as propylene glycol, triethylene glycol, 1,3-butylene glycol, and glycerol); an ester of a polyhydric alcohol (such as glyceryl monoacetate, glyceryl diacetate, or glyceryl triacetate); a monocarboxylic acid; a polycarboxylic acid (such as lauric acid, myristic acid), or an aliphatic ester of a polycarboxylic acid (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butylene glycol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triactin, meso-erythritol, a mixture of diacetyl glycerides, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, tributyrin, and lauryl acetate).

[0073] In one embodiment, the adhesive component is a natural plant-extracted, non-ionically modified viscous polysaccharide, including one or more combinations of tamarind polysaccharide, pullulan, seaweed polysaccharide, locust bean gum, guar gum, and xyloglucan. The adhesive wetting and intimately contacting the product component materials creates intermolecular attraction, thereby bonding the powders and liquids of the component materials. The use of a natural plant-extracted, non-ionic adhesive can prevent the release of harmful substances such as methanol, formaldehyde, and acrolein caused by colloid modification, thereby improving the safety of the product.

[0074] Exemplarily, the aerosol generating matrix segment 10 is an integral structure. For example, the aerosol generating matrix segment 10 can be a particle combination, and the particle combination is a reconstituted tobacco medium, for example, a reconstituted tobacco medium containing ingredients such as a smoke-generating agent and tobacco. The aerosol generating matrix segment 10 can be an injection molding structure, a compression molding structure, an extrusion molding structure, a casting molding structure, a compression molding structure, and a 3D printing molding structure. Extrusion molding refers to a processing method in which a raw material mixture is added to an extruder, and the material is pushed forward by the screw through the action between the extruder barrel and the screw, and continuously passes through the die to form various cross-section products or semi-finished products. The aerosol matrix formed by extrusion molding is in the form of strips.

[0075] Since the aerosol generating matrix segment 10 is a particle combination, it is an integrated medium when the aerosol generating matrix segment 10 is heated and sucked or stops being heated, and is not prone to disintegration and falling off. This solves the problems of thin sheet, filament or loose particle aerosol generating products in the prior art, such as loose sheets, falling off of filamentous components and particle components, and difficulty in cleaning.

[0076] In addition, the shape of the aerosol generating matrix segment 10 is not limited. For example, please refer to Figure 2. The aerosol generating matrix segment 10 can be cylindrical. The cross-section of the cylindrical aerosol generating matrix segment 10 can be circular or other shapes, such as polygonal (including but not limited to triangle, square, prism, etc.), elliptical, runway-shaped or irregular, etc., wherein irregular refers to other symmetrical or asymmetrical shapes other than the shapes listed above.

[0077] The cooling section 21 is used to cool the aerosol to reduce the temperature of the aerosol and improve the "burning mouth" phenomenon when the user inhales the aerosol.

[0078] The material of the cooling section 21 is not limited. For example, the material of the cooling section 21 can be ceramic, silica gel, acetate fiber, PET (polyethylene terephthalate), etc.

[0079] The variable diameter channel 21a is a channel for aerosol to pass through. The variable diameter channel 21a has an air flow inlet 21aa at one end close to the aerosol generating matrix segment 10, and has an air flow outlet 21ab at the end of the variable diameter channel 21a away from the aerosol generating matrix segment 10. During the user's inhalation process, the aerosol flows into the variable diameter channel 21a from the air flow inlet 21aa and is cooled in the variable diameter channel 21a. The cooled aerosol flows out from the air flow outlet 21ab.

[0080] Please refer to FIG. 1 , the diameter-changing channel 21 a may be disposed inside the cooling section 21 . Please refer to FIG. 21 , the diameter-changing channel 21 a may also be disposed on the outer wall of the cooling section 21 .

[0081] The number of the variable-diameter channels 21a can be one or more. When the number of the variable-diameter channels 21a is more than one, the variable-diameter channels 21a can all be set inside the cooling section 21, or all be set on the outer wall of the cooling section 21, or partly be set inside the cooling section 21, and partly be set on the outer wall of the cooling section 21.

[0082] The cross-sectional dimension of the variable-diameter channel 21 a refers to the external dimension of the cross section of the variable-diameter channel 21 a perpendicular to the extending direction, that is, the external dimension of the cross section of the variable-diameter channel 21 a .

[0083] The cross-sectional area of ​​the variable channel 21a can be calculated based on the cross-sectional dimensions of the variable channel 21a. For example, the cross-sectional shape of the variable channel 21a shown in FIG2 is circular. Therefore, the cross-sectional dimensions of the variable channel 21a refer to the diameter or radius of the cross section of the variable channel 21a.

[0084] The cross-sectional shape of the variable diameter channel 21a is not limited. For example, in addition to the circular shape shown in FIG2 , the cross-sectional shape of the variable diameter channel 21a can also be polygonal (including but not limited to triangle, square, prism, etc.), elliptical, racetrack-shaped or irregular-shaped.

[0085] The cross-sectional dimensions at at least one position of the variable diameter channel 21a are different from the cross-sectional dimensions at other positions, which means that the variable diameter channel 21a is a variable cross-sectional structure with a changing cross-sectional dimension, rather than a constant cross-sectional structure with the same cross-sectional dimension at any position. The position where the cross-sectional dimension of the variable diameter channel 21a changes can be any position along the extension direction of the variable diameter channel 21a.

[0086] The cross-sectional dimensions of the variable-diameter channel 21a may be larger at at least one position than at other positions, or smaller at at least one position than at other positions, as long as the cross-sectional dimensions of the variable-diameter channel 21a vary.

[0087] The functional section 20 may be provided with only a cooling section 21, or may be provided with other sections outside the cooling section 21. For example, please refer to Figures 2 and 3. The functional section 20 may also be provided with a filtering section 22. The filtering section 22 is provided on the side of the cooling section 21 away from the aerosol generating matrix section 10 to filter the aerosol after the cooling treatment.

[0088] The material of the filter section 22 is not limited. For example, the material of the filter section 22 can be acetate fiber, PET, etc.

[0089] It should be noted that the aerosol-generating product relies on the aerosol-generating substrate segment 10 to generate aerosol, and the functional segment 20 does not generate aerosol.

[0090] For example, referring to FIG. 2 and FIG. 3 , the aerosol-generating article may further be provided with an outer wrapping layer 30 , which wraps around the outer periphery of the functional segment 20 and the aerosol-generating substrate segment 10 .

[0091] The material of the outer wrapping layer 30 is not limited. For example, the outer wrapping layer 30 includes but is not limited to one or more combinations of fiber paper, metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, PE (polyethylene), PBAT (butylene adipate-co-terephthalate), and the like.

[0092] Exemplarily, the outer wrapping layer 30 can be a one-layer or two-layer structure. For example, when the outer wrapping layer 30 is a one-layer structure, the aerosol generating matrix segment 10, the cooling segment 21 and the filter segment 22 can be wrapped at the same time. When the outer wrapping layer 30 is a two-layer structure, the cooling segment 21 and the filter segment 22 can be first wrapped by one outer wrapping layer 30, and then wrapped by another outer wrapping layer 30. Alternatively, the outer wrapping layer 30 can also be wrapped in other ways.

[0093] In addition, please refer to Figure 2. The aerosol generating matrix segment 10 and the functional segment 20 can be coaxially arranged cylinders. The outer diameters of the aerosol generating matrix segment 10 and the functional segment 20 can be the same or different. Preferably, the outer diameters of the aerosol generating matrix segment 10 and the functional segment 20 are the same, and the extension direction of the variable diameter channel 21a is the axial direction of the aerosol generating matrix segment 10 and the functional segment 20.

[0094] In the related art, the cooling structure of aerosol-generating products generally cools the aerosol by setting up air flow channels with equal cross-sections. However, when the aerosol with a higher temperature flows through the air flow channels with equal cross-sections, the flow rate of the aerosol is basically constant. Therefore, the cooling effect of the aerosol is poor.

[0095] The aerosol generating product of the embodiment of the present application is provided with a cooling section 21 having a variable diameter channel 21a in the functional section 20. Along the extension direction of the variable diameter channel 21a, the cross-sectional dimensions at at least one position of the variable diameter channel 21a are different from the cross-sectional dimensions at other positions. That is, there are regions with relatively large cross-sectional dimensions and regions with relatively small cross-sectional dimensions in the variable diameter channel 21a. The aerosol has a slower flow rate in the region with relatively large cross-sectional dimensions, a relatively longer contact time with the inner side wall of the variable diameter channel 21a, and a relatively larger contact area. The aerosol has a faster flow rate in the region with relatively small cross-sectional dimensions, a relatively shorter contact time with the inner side wall of the variable diameter channel 21a, and a relatively smaller contact area. That is, As the aerosol flows along the variable-diameter channel 21a, the flow rate of the aerosol will change, and the contact time and contact area between the aerosol and the inner wall at different positions in the variable-diameter channel 21a will also change. As a result, the heat of the aerosol can be better transferred through the inner wall of the variable-diameter channel 21a, thereby improving the cooling effect.

[0096] Compared with the cooling method of aerosol-generating products in related technologies, the aerosol-generating products of the embodiments of the present application can further reduce the temperature of the aerosol by at least 3°C ​​to 5°C (including the endpoint values). The lower aerosol temperature is more conducive to improving the user's puffing experience.

[0097] In one embodiment, referring to FIG. 2 to FIG. 4 and FIG. 8 to FIG. 11 , at least a portion of the variable diameter channel 21 a may be a variable diameter region whose cross-sectional size gradually decreases or increases along the extension direction.

[0098] That is to say, the cross-sectional dimensions of at least a part of the area of ​​the variable diameter channel 21a gradually decreases along the extension direction, or the cross-sectional dimensions of at least a part of the area of ​​the variable diameter channel 21a can also gradually decrease along the extension direction, which is equivalent to that the cross-sectional dimensions of the variable diameter channel 21a can be changed by gradually reducing or increasing the cross-sectional dimensions.

[0099] The variable diameter area with gradually decreasing or increasing cross-sectional dimensions can extend the length of the inner wall of the variable diameter channel 21a to a certain extent, thereby increasing the contact time and contact area between the aerosol and the inner wall of the variable diameter channel 21a, thereby better enhancing the heat conduction effect between the aerosol and the inner wall of the variable diameter channel 21a.

[0100] 3 , the inner sidewall of the variable diameter channel 21a in the variable diameter region may be curved inwardly of the variable diameter channel 21a . In other words, the inner sidewall of the variable diameter channel 21a in the variable diameter region may have a certain curvature.

[0101] Exemplarily, the curvature of the inner side wall of the variable diameter channel 21a in the variable diameter area can be 0.5rad to 1.58rad (including the endpoint values). For example, the curvature of the inner side wall of the variable diameter channel 21a in the variable diameter area can be 0.5rad, 0.8rad, 1ad, 1.2ad, 1.58rad, etc.

[0102] The inner side wall of the variable diameter channel 21a in the variable diameter area is in a curved shape that bends inwardly toward the variable diameter channel 21a, which can further extend the length of the inner side wall of the variable diameter channel 21a in the variable diameter area, and further increase the area of ​​the inner side wall of the variable diameter channel 21a in the variable diameter area, and the heat conduction effect between the aerosol and the inner side wall of the variable diameter channel 21a is also better.

[0103] Referring to Figures 5 and 6 , the aerosol-generating article may be provided with a cavity 10b on the outer periphery of the cooling section 21. Cavity 10b corresponds to the space between the cooling section 21 and the outer wrapping layer 30. The cooling section 21 may be provided with an airway groove 21b extending through the sidewall of the variable diameter passage 21a located in the variable diameter region, thereby connecting the variable diameter region with cavity 10b.

[0104] The number of the airway groove 21b may be one or more.

[0105] The airway groove 21b in Figures 5 and 6 surrounds the circumference of the variable-diameter channel 21a. Specifically, only one airway groove 21b is provided in Figures 5 and 6, and the airway groove 21b extends spirally along the circumference of the variable-diameter channel 21a. In other embodiments, multiple airway grooves 21b may be arranged at intervals along the extension direction.

[0106] In other embodiments, the airway groove 21b may also extend along the extension direction.

[0107] The airway groove 21b can not only increase the area of ​​the inner wall of the variable diameter region to enhance the heat conduction effect between the aerosol and the inner wall of the variable diameter channel 21a, but also play a role in adjusting the inhalation resistance.

[0108] In one embodiment, referring to FIG. 3 to FIG. 12 , the cross-sectional dimension of one of the air inlet 21aa and the air outlet 21ab may be the maximum cross-sectional dimension of the variable-diameter channel 21a , and the cross-sectional dimension of the other may be the minimum cross-sectional dimension of the variable-diameter channel 21a .

[0109] In other words, the cross-sectional dimension of the airflow inlet 21aa may be the maximum cross-sectional dimension of the variable-diameter channel 21a, and the cross-sectional dimension of the airflow outlet 21ab may be the minimum cross-sectional dimension of the variable-diameter channel 21a. Alternatively, the cross-sectional dimension of the airflow inlet 21aa may be the minimum cross-sectional dimension of the variable-diameter channel 21a, and the cross-sectional dimension of the airflow outlet 21ab may be the maximum cross-sectional dimension of the variable-diameter channel 21a. This is equivalent to the cross-sectional dimension of one of the airflow inlet 21aa and the airflow outlet 21ab being the maximum cross-sectional dimension of the entire variable-diameter channel 21a, and the cross-sectional dimension of the other of the airflow inlet 21aa and the airflow outlet 21ab being the minimum cross-sectional dimension of the entire variable-diameter channel 21a. The cross-sectional dimension of the variable-diameter channel 21a between the airflow inlet 21aa and the airflow outlet 21ab will not be greater than the maximum cross-sectional dimension (may be equal to the maximum cross-sectional dimension), nor will it be less than the minimum cross-sectional dimension (may be equal to the minimum cross-sectional dimension).

[0110] The cross-sectional size of the variable-diameter channel 21a can gradually change from the air flow inlet 21aa to the air flow outlet 21ab. For example, please refer to Figures 3 to 5. From the air flow inlet 21aa to the air flow outlet 21ab, the cross-sectional size of the variable-diameter channel 21a can gradually decrease. That is, the closer to the air flow outlet 21ab, the smaller the cross-sectional size of the variable-diameter channel 21a.

[0111] For example, referring to FIG. 10 , the cross-sectional size of the variable-diameter channel 21a may gradually increase from the airflow inlet 21aa to the airflow outlet 21ab. That is, the closer to the airflow outlet 21ab, the larger the cross-sectional size of the variable-diameter channel 21a.

[0112] The variable diameter channel 21a may also be provided in at least two sections. For example, referring to Figures 7 to 9, 11, and 12, along the extension direction of the variable diameter channel 21a, the variable diameter channel 21a may include an initial section 21a1 closest to the aerosol-generating substrate segment 10 and a final section 21a2 farthest from the aerosol-generating substrate segment 10. The initial section 21a1 has an airflow inlet 21aa, and the final section 21a2 has an airflow outlet 21ab. In other words, the initial section 21a1 is the first section of the variable diameter channel 21a along the extension direction, and the final section 21a2 is the last section of the variable diameter channel 21a along the extension direction. One of the initial section 21a1 and the final section 21a2 has the largest cross-sectional dimension, while the other has the smallest cross-sectional dimension.

[0113] Please refer to Figures 7 and 8. The variable diameter channel 21a can only be provided with an initial section 21a1 and a final section 21a2. Please refer to Figure 9. The variable diameter channel 21a can also have an intermediate section 21a3 located between the initial section 21a1 and the final section 21a2. The number and structure of the intermediate sections 21a3 are not limited, as long as the cross-sectional size of the intermediate sections 21a3 is less than or equal to the maximum cross-sectional size and greater than or equal to the minimum cross-sectional size.

[0114] It should be noted that the difference between the cross-sectional dimensions of the variable channel 21a gradually changing from the air flow inlet 21aa to the air flow outlet 21ab and the variable channel 21a having at least two sections is that the inner side wall of the variable channel 21a whose cross-sectional dimensions gradually change along the extension direction maintains a smooth transition from the air flow inlet 21aa to the air flow outlet 21ab, that is, there is no contour line on the variable channel 21a where the cross-sectional dimensions are significantly changed, while there is a contour line between adjacent two sections of the variable channel 21a with at least two sections where the cross-sectional dimensions are significantly changed.

[0115] The variable diameter channel 21a in which the initial section 21a1 has the largest cross-sectional size and the final section 21a2 has the smallest cross-sectional size can have various structural forms. For example, please refer to Figure 7. The initial section 21a1 and the final section 21a2 can be equal-diameter structures respectively. The cross-sectional size of the initial section 21a1 can be the maximum cross-sectional size of the variable diameter channel 21a, and the cross-sectional size of the final section 21a2 can be the minimum cross-sectional size of the variable diameter channel 21a.

[0116] The equal-diameter structure refers to a structure in which the cross-sectional dimensions remain consistent, that is, the cross-sectional dimensions at any position on the initial segment 21a1 are the same, and the cross-sectional dimensions at any position on the final segment 21a2 are also the same.

[0117] The variable diameter channel 21a in Figure 7 can make the cross-sectional dimension of the air flow inlet 21aa become the maximum cross-sectional dimension of the variable diameter channel 21a, and the cross-sectional dimension of the air flow outlet 21ab become the minimum cross-sectional dimension of the variable diameter channel 21a by setting the cross-sectional dimension of the initial section 21a1 to the maximum cross-sectional dimension and the cross-sectional dimension of the final section 21a2 to the minimum cross-sectional dimension.

[0118] Furthermore, the cross-sectional area ratio of the cross-sectional size of the initial segment 21a1 to the cross-sectional size of the final segment 21a2 can be: 2-5:1-2, for example, 2:1, 3:1, 3:2, 4:1, 5:1, 5:2, etc.

[0119] That is, the contact time and area between the aerosol and the inner wall of the variable diameter channel 21a can be changed by setting equal diameter structures with different cross-sectional sizes, so as to enhance the heat conduction effect between the aerosol and the inner wall of the variable diameter channel 21a.

[0120] For example, please refer to Figures 8 and 9. The initial section 21a1 can be a variable diameter structure whose cross-sectional size gradually decreases along the extension direction. The variable diameter structure is actually the structure of the variable diameter area described in the previous embodiment. The final section 21a2 can be an equal diameter structure. The maximum value of the cross-sectional size of the initial section 21a1 is greater than the cross-sectional size of the final section 21a2. The maximum value of the cross-sectional size of the initial section 21a1 is actually the cross-sectional size of the air flow inlet 21aa, and the cross-sectional size of the final section 21a2 is actually the cross-sectional size of the air flow outlet 21ab. By setting the maximum value of the cross-sectional size of the initial section 21a1 to be greater than the cross-sectional size of the final section 21a2, the cross-sectional size of the air flow inlet 21aa can become the maximum cross-sectional size of the variable diameter channel 21a, and the cross-sectional size of the air flow outlet 21ab can become the minimum cross-sectional size of the variable diameter channel 21a.

[0121] The inclination angle of the initial segment 21a1 can be set as needed. For example, the inclination angle of the initial segment 21a1 can be 30° to 60° (including the endpoint values), for example, the inclination angle of the final segment 21a2 can be 30°, 45°, or 60°.

[0122] The variable diameter channel 21a in FIG9 further includes an intermediate section 21a3, which also has a variable diameter structure with a cross-sectional dimension gradually decreasing along the extension direction. The inclination angle of the intermediate section 21a3 is different from the inclination angle of the initial section 21a1. For example, when the inclination angle of the intermediate section 21a3 is 30°, the inclination angle of the initial section 21a1 may be 60°. In other embodiments, the intermediate section 21a3 may also have a constant diameter structure, or the intermediate section 21a3 may not be provided.

[0123] In some embodiments, the initial section 21a1 may be a constant diameter structure, and the final section 21a2 may be a variable diameter structure whose cross-sectional dimensions gradually decrease along the extension direction, and the cross-sectional dimensions of the initial section 21a1 are greater than the minimum value of the cross-sectional dimensions of the final section 21a2.

[0124] The variable diameter structure can extend the length of the inner wall of the variable diameter channel 21a to a certain extent, thereby increasing the contact time and contact area between the aerosol and the inner wall of the variable diameter channel 21a, thereby better enhancing the heat conduction effect between the aerosol and the inner wall of the variable diameter channel 21a.

[0125] For example, the initial section 21a1 and the final section 21a2 may both have variable diameter structures. For example, the cross-sectional dimensions of the initial section 21a1 and the final section 21a2 may both gradually decrease along the extension direction, with the maximum cross-sectional dimension of the initial section 21a1 being greater than the minimum cross-sectional dimension of the final section 21a2. The maximum cross-sectional dimension of the initial section 21a1 is actually the cross-sectional dimension of the airflow inlet 21aa, and the minimum cross-sectional dimension of the final section 21a2 is actually the cross-sectional dimension of the airflow outlet 21ab. By setting the maximum cross-sectional dimension of the initial section 21a1 to be greater than the minimum cross-sectional dimension of the final section 21a2, the cross-sectional dimension of the airflow inlet 21aa can be made the maximum cross-sectional dimension of the variable diameter channel 21a, and the cross-sectional dimension of the airflow outlet 21ab can be made the minimum cross-sectional dimension of the variable diameter channel 21a.

[0126] Similarly, the variable diameter channel 21a in which the initial section 21a1 has the smallest cross-sectional size and the final section 21a2 has the largest cross-sectional size may also have multiple structural forms. For example, please refer to Figure 11. The initial section 21a1 and the final section 21a2 may also be equal-diameter structures. The cross-sectional size of the initial section 21a1 may be the minimum cross-sectional size of the variable diameter channel 21a, and the cross-sectional size of the final section 21a2 may be the maximum cross-sectional size of the variable diameter channel 21a.

[0127] That is to say, by setting the cross-sectional size of the initial section 21a1 to the minimum cross-sectional size and the cross-sectional size of the final section 21a2 to the maximum cross-sectional size, the cross-sectional size of the airflow inlet 21aa becomes the minimum cross-sectional size of the variable diameter channel 21a, and the cross-sectional size of the airflow outlet 21ab becomes the maximum cross-sectional size of the variable diameter channel 21a.

[0128] Furthermore, the cross-sectional area ratio of the cross-sectional size of the initial segment 21a1 to the cross-sectional size of the final segment 21a2 may be 1-2:2-5, for example, 1:2, 1:3, 1:4, 1:5, 2:3, 2:5, etc.

[0129] Exemplarily, referring to Figure 12, the initial section 21a1 can be a constant diameter structure, and the final section 21a2 can be a variable diameter structure whose cross-sectional size gradually increases along the extension direction. The cross-sectional size of the initial section 21a1 is smaller than the maximum value of the cross-sectional size of the final section 21a2. The cross-sectional size of the initial section 21a1 is actually the cross-sectional size of the airflow inlet 21aa, and the maximum value of the cross-sectional size of the final section 21a2 is actually the cross-sectional size of the airflow outlet 21ab. By setting the cross-sectional size of the initial section 21a1 to be larger than the maximum value of the cross-sectional size of the final section 21a2, the cross-sectional size of the airflow inlet 21aa can be made the minimum cross-sectional size of the variable diameter channel 21a, and the cross-sectional size of the airflow outlet 21ab can be made the maximum cross-sectional size of the variable diameter channel 21a.

[0130] The inclination angle of the end segment 21a2 can be set as needed. For example, the inclination angle of the end segment 21a2 can be 30° to 60° (including the endpoint values), for example, the inclination angle of the end segment 21a2 can be 30°, 45°, or 60°.

[0131] In some embodiments, the initial section 21a1 may be a variable diameter structure whose cross-sectional dimensions gradually increase along the extension direction, and the final section 21a2 may be a constant diameter structure, wherein the minimum cross-sectional dimension of the initial section 21a1 is smaller than the cross-sectional dimension of the final section 21a2.

[0132] For example, the initial section 21a1 and the final section 21a2 can both have a variable diameter structure, with the cross-sectional dimensions of the initial section 21a1 and the final section 21a2 gradually increasing along the extension direction, and the minimum cross-sectional dimension of the initial section 21a1 being smaller than the maximum cross-sectional dimension of the final section 21a2. The minimum cross-sectional dimension of the initial section 21a1 is actually the cross-sectional dimension of the airflow inlet 21aa, and the maximum cross-sectional dimension of the final section 21a2 is actually the cross-sectional dimension of the airflow outlet 21ab. By setting the minimum cross-sectional dimension of the initial section 21a1 to be smaller than the maximum cross-sectional dimension of the final section 21a2, the cross-sectional dimension of the airflow inlet 21aa can be made the minimum cross-sectional dimension of the variable diameter channel 21a, and the cross-sectional dimension of the airflow outlet 21ab can be made the maximum cross-sectional dimension of the variable diameter channel 21a.

[0133] When the cross-sectional dimension of the air flow inlet 21aa is the maximum cross-sectional dimension of the variable-diameter channel 21a and the cross-sectional dimension of the air flow outlet 21ab is the minimum cross-sectional dimension of the variable-diameter channel 21a, the aerosol flows from the end of the variable-diameter channel 21a with a relatively larger cross-sectional dimension to the end of the variable-diameter channel 21a with a relatively smaller cross-sectional dimension, and the flow rate of the aerosol gradually increases from small to large, and the contact area with the inner side wall of the variable-diameter channel 21a also decreases from large to small. Similarly, when the cross-sectional dimension of the air flow inlet 21aa is the minimum cross-sectional dimension of the variable-diameter channel 21a and the cross-sectional dimension of the air flow outlet 21ab is the maximum cross-sectional dimension of the variable-diameter channel 21a, the aerosol Flowing from the end of the variable diameter channel 21a with a relatively smaller cross-sectional size to the end of the variable diameter channel 21a with a relatively larger cross-sectional size, the flow rate of the aerosol gradually decreases, and the contact area with the inner wall of the variable diameter channel 21a also changes from small to large. Both methods can effectively increase the contact time of the aerosol with the inner wall of the variable diameter channel 21a, and increase the contact area of ​​the aerosol with the inner wall of the variable diameter channel 21a. Compared with the cooling method of the aerosol generating product in the related art, the temperature of the aerosol can be further reduced by at least 4°C to 6°C (including the endpoint values), thereby providing users with a better inhalation experience.

[0134] In one embodiment, referring to Figures 13 to 21, the cross-sectional dimensions of the variable-diameter channel 21a may also alternately change along the extension direction. That is, along the extension direction, the cross-sectional dimensions of the variable-diameter channel 21a may alternately change between increasing and decreasing. For example, the cross-sectional dimensions of the variable-diameter channel 21a may first increase and then decrease, or may first decrease and then increase, as long as they can alternate.

[0135] For example, referring to FIG. 13 , the cross-sectional size of the variable-diameter channel 21 a may gradually decrease and then gradually increase along the extending direction.

[0136] Please refer to FIG. 13 , the inner sidewall of the variable-diameter channel 21 a may also be in the shape of a curve that bends inwardly toward the variable-diameter channel 21 a .

[0137] The cross-sectional dimensions of the variable-diameter channel 21a gradually decrease and then increase along the extension direction, which can make the aerosol contact the inner wall of the variable-diameter channel 21a for a longer time and a larger contact area, and can better enhance the heat conduction effect between the aerosol and the inner wall of the variable-diameter channel 21a.

[0138] In other embodiments, the cross-sectional size of the variable-diameter channel 21 a may also gradually decrease and then gradually increase along the extending direction.

[0139] For example, referring to FIG. 14 and FIG. 15 , along the extension direction, the variable diameter channel 21 a has at least three equal diameter sections 21 a 4 , and the equal diameter sections 21 a 4 are alternately arranged according to the size of the cross-sectional dimensions.

[0140] The equal-diameter section 21a4 is equivalent to the equal-diameter structure described in the previous embodiment, that is, the cross-sectional dimensions of the same equal-diameter section 21a4 remain consistent.

[0141] The variable diameter channel 21a may have three equal diameter sections 21a4, or may have more than three equal diameter sections 21a4. For example, the variable diameter channel 21a shown in FIG14 has three equal diameter sections 21a4, and the variable diameter channel 21a shown in FIG15 has five equal diameter sections 21a4.

[0142] The cross-sectional dimensions of the equal-diameter sections 21a4 may be arranged in the order of small-large-small as shown in FIG14 , or in the order of large-small-large.

[0143] It should be noted that when the number of equal-diameter segments 21a4 with relatively small cross-sectional dimensions is at least two, the cross-sectional dimensions of each equal-diameter segment 21a4 with relatively small cross-sectional dimensions may be the same or different. Similarly, when the number of equal-diameter segments 21a4 with relatively large cross-sectional dimensions is at least two, the cross-sectional dimensions of each equal-diameter segment 21a4 with relatively large cross-sectional dimensions may be the same or different.

[0144] Furthermore, referring to Figures 16 and 17 , the variable diameter channel 21a may further include a variable diameter section 21a5 between two adjacent constant diameter sections 21a4, with the cross-sectional dimensions of the variable diameter section 21a5 transitioning from one of the two adjacent constant diameter sections 21a4 to the other. In other words, if the cross-sectional dimensions of the upstream constant diameter section 21a4 in the direction of extension of two adjacent constant diameter sections 21a4 are larger than the cross-sectional dimensions of the downstream constant diameter section 21a4 in the direction of extension, the cross-sectional dimensions of the variable diameter section 21a5 gradually decrease along the direction of extension. For example, in the two variable diameter sections 21a5 shown in Figure 16 , the cross-sectional dimensions of the variable diameter section 21a5 closer to the aerosol-generating substrate section 10 gradually decrease along the direction of extension. In the two variable diameter sections 21a5 shown in Figure 17 , the cross-sectional dimensions of the variable diameter section 21a5 facing away from the aerosol-generating substrate section 10 gradually decrease along the direction of extension. Similarly, in two adjacent equal-diameter sections 21a4, if the cross-sectional size of the equal-diameter section 21a4 located upstream in the extension direction is smaller than the cross-sectional size of the equal-diameter section 21a4 located downstream in the extension direction, the cross-sectional size of the variable-diameter section 21a5 gradually increases along the extension direction. For example, in the two variable-diameter sections 21a5 shown in FIG16 , the cross-sectional size of the variable-diameter section 21a5 that faces away from the aerosol generating matrix section 10 gradually increases along the extension direction. In the two variable-diameter sections 21a5 shown in FIG17 , the cross-sectional size of the variable-diameter section 21a5 that is close to the aerosol generating matrix section 10 gradually increases along the extension direction.

[0145] For example, referring to Figures 18 and 19, along the extension direction, the variable diameter channel 21a may further include at least two variable diameter sections 21a5 and a constant diameter section 21a4 located between two adjacent variable diameter sections 21a5. In other words, the number of variable diameter sections 21a5 may be two or more, and a constant diameter section 21a4 is provided between each two adjacent variable diameter sections 21a5. Of the two adjacent variable diameter sections 21a5, the cross-sectional dimension of one variable diameter section 21a5 gradually decreases along the extension direction, while the cross-sectional dimension of the other variable diameter section 21a5 gradually increases along the extension direction.

[0146] The variable diameter channel 21a in Figure 18 is provided with two variable diameter sections 21a5, and there is a constant diameter section 21a4 between the two variable diameter sections 21a5, wherein the cross-sectional size of the variable diameter section 21a5 located between the aerosol generating matrix section 10 and the constant diameter section 21a4 gradually decreases along the extension direction, and the cross-sectional size of the variable diameter section 21a5 located at the end of the constant diameter section 21a4 away from the aerosol generating matrix section 10 gradually increases along the extension direction. In other implementations, the cross-sectional size of the variable diameter section 21a5 located between the aerosol generating matrix section 10 and the constant diameter section 21a4 may gradually increase along the extension direction, and the cross-sectional size of the variable diameter section 21a5 located at the end of the constant diameter section 21a4 away from the aerosol generating matrix section 10 may gradually decrease along the extension direction.

[0147] The variable diameter channel 21a in Figure 19 is provided with four variable diameter sections 21a5. Among the four variable diameter sections 21a5, the cross-sectional size of the first variable diameter section 21a5 gradually decreases along the extension direction, the cross-sectional size of the second variable diameter section 21a5 gradually increases along the extension direction, the cross-sectional size of the third variable diameter section 21a5 gradually decreases along the extension direction, and the cross-sectional size of the fourth variable diameter section 21a5 gradually increases along the extension direction. That is to say, the four variable diameter sections 21a5 are alternately arranged in the order of gradually decreasing cross-sectional size along the extension direction and gradually increasing cross-sectional size along the extension direction. In other implementations, the four variable diameter sections 21a5 can also be alternately arranged in the order of gradually increasing cross-sectional size along the extension direction and gradually decreasing cross-sectional size along the extension direction.

[0148] In addition, the cross-sectional dimensions of the constant diameter section 21a4 can be consistent with the cross-sectional dimensions of the variable diameter sections 21a5 located at its opposite ends. For example, the minimum values ​​of the cross-sectional dimensions of the two variable diameter sections 21a5 in Figure 18 are both equal to the cross-sectional dimensions of the constant diameter section 21a4. The minimum values ​​of the cross-sectional dimensions of the first variable diameter section 21a5 and the second variable diameter section 21a5 in Figure 19 are both equal to the cross-sectional dimensions of the constant diameter section 21a4 located between the first variable diameter section 21a5 and the second variable diameter section 21a5. The maximum values ​​of the cross-sectional dimensions of the second variable diameter section 21a5 and the third variable diameter section 21a5 are both equal to the cross-sectional dimensions of the constant diameter section 21a4 located between the second variable diameter section 21a5 and the third variable diameter section 21a5. In other embodiments, the cross-sectional dimensions of the constant diameter section 21a4 may also be different from the cross-sectional dimensions of the variable diameter sections 21a5 located at its opposite ends.

[0149] For example, please refer to Figures 20 and 21. Along the extension direction, at least part of the inner wall of the variable diameter channel 21a can also be a sinusoidal waveform. That is, the variable diameter channel 21a can have the entire inner wall in the extension direction in a sinusoidal waveform, or only part of the inner wall can have a sinusoidal waveform in the extension direction.

[0150] For example, the entire inner side wall of the variable diameter channel 21a shown in FIG20 is sinusoidal in the extending direction, while only a portion of the inner side wall of the variable diameter channel 21a shown in FIG21 is sinusoidal in the extending direction.

[0151] Please refer to Figures 20 and 21. The inner wall presenting a sinusoidal waveform has peaks 21a6 and troughs 21a7. The total number of peaks 21a6 and troughs 21a7 is at least 2. Preferably, the total number of peaks 21a6 and troughs 21a7 can be 5 to 15 (including endpoint values). For example, the total number of peaks 21a6 and troughs 21a7 can be 5, 8, 10, 12, or 15. More preferably, the total number of peaks 21a6 and troughs 21a7 can be 10.

[0152] The cross-sectional dimensions of the variable-diameter channel 21a change alternately along the extension direction, which can further extend the path of the variable-diameter channel 21a and increase the area of ​​the inner wall of the variable-diameter channel 21a. When the aerosol passes through the variable-diameter channel 21a, the overall flow rate is relatively slow, and the contact area with the inner wall of the variable-diameter channel 21a is larger, so the cooling effect is better.

[0153] Compared with the cooling method of aerosol generating products in related technologies, the variable diameter channel 21a whose cross-sectional size changes alternately along the extension direction can at least reduce the temperature of the aerosol by at least 5°C to 7°C (including the endpoint values), among which the variable diameter channel 21a with a sinusoidal waveform can reduce the temperature of the aerosol by at least 5°C to 8°C (including the endpoint values).

[0154] In one embodiment, referring to FIG. 3 and FIG. 4 , the interior of the aerosol-generating substrate segment 10 may further include at least one air channel 10 a , which passes through at least one of the two opposite ends of the aerosol-generating substrate segment 10 along the airflow direction.

[0155] 3 and the air channel 10a in FIG4 pass through the opposite ends of the aerosol generating substrate segment 10 along the airflow direction. In some embodiments, the air channel 10a may also pass through only one end of the aerosol generating substrate segment 10 close to the functional segment 20, while the other end is a closed end. Alternatively, the air channel 10a may also pass through only one end of the aerosol generating substrate segment 10 away from the functional segment 20, while the other end is a closed end.

[0156] Compared with the air passage 10a running through one end of the aerosol generating matrix segment 10 along the airflow direction, the air passage 10a running through both ends of the aerosol generating matrix segment 10 along the airflow direction is more conducive to reducing the user's inhalation resistance.

[0157] The number of the air passage 10a may be one or more.

[0158] The airway 10a may be a straight airway as shown in FIG. 3 and FIG. 4 . The straight airway is an airway extending in a straight line, or in other words, the extending direction of the straight airway is a straight line.

[0159] The airway 10a may also be a spiral airway. A spiral airway is an airway in which at least a portion of its extension direction is curved with a non-zero curvature. For example, along its extension direction, the spiral airway may have both non-zero curvature curved segments and zero curvature straight segments, or it may have only non-zero curvature curved segments and no zero curvature straight segments. In other words, the spiral airway only needs to not extend in a straight line from its starting point to its end point along its extension direction.

[0160] When there are multiple air passages 10 a , some of the air passages 10 a may be straight air passages, and other air passages 10 a may be spiral air passages.

[0161] The shape of the cross section of the airway 10a is not limited. For example, the cross section may be circular, polygonal (including but not limited to triangle, square, prism, etc.), elliptical, racetrack-shaped, or irregular-shaped.

[0162] Taking the aerosol generating product shown in Figure 3 as an example, when the aerosol generating matrix segment 10 is heated, the aerosol generating matrix segment 10 releases aerosol. Since at least some of the micropores or gaps in the wall material of the aerosol generating matrix segment 10 are connected to the airway 10a, the aerosol released by the aerosol generating matrix segment 10 when heated can enter the airway 10a through the micropores or gaps connected to the airway 10a. At the same time, external airflow such as air can enter the airway 10a of the aerosol generating matrix segment 10 from the end of the aerosol generating matrix segment 10 away from the functional segment 20. In this way, during the inhalation process, the airflow gathered in the airway 10a can carry the aerosol to the functional segment 20, and is cooled when passing through the reducing channel 21a of the cooling segment 21, and then enters the user's mouth after being filtered through the filter segment 22.

[0163] The airway 10a can extend the airflow path and increase the flow velocity of the airflow in the aerosol generating matrix segment 10, thereby increasing the impact force of the airflow and enabling the aerosol to be evenly mixed, thereby improving the extraction efficiency and uniformity of the aerosol in the aerosol generating matrix segment 10 and enhancing the user's inhalation experience.

[0164] In the description of this application, the descriptions with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in this application and features of different embodiments or examples, unless they are mutually inconsistent.

[0165] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. An aerosol generating article comprising: Aerosol generating matrix segment; A functional segment is arranged at one end of the aerosol generating substrate segment, and the functional segment at least includes a cooling segment having a variable diameter channel, and the variable diameter channel extends in a direction away from the aerosol generating substrate segment, and along the extension direction of the variable diameter channel, the cross-sectional dimensions at at least one position of the variable diameter channel are different from the cross-sectional dimensions at other positions.

2. The aerosol generating article according to claim 1, wherein the variable diameter channel is arranged inside the temperature reduction section; or The variable diameter channel is arranged on the outer side wall of the temperature reduction section.

3. The aerosol generating article according to claim 1 or 2, wherein at least a portion of the variable diameter channel is a variable diameter region whose cross-sectional size gradually decreases or gradually increases along the extension direction. 4 . The aerosol generating product according to claim 3 , wherein the inner side wall of the variable diameter channel located in the variable diameter region is in a curved shape bending inwardly of the variable diameter channel.

5. The aerosol generating product according to claim 3, wherein the aerosol generating product has a cavity located on the outer peripheral side of the cooling section, and the cooling section has an airway groove, and the airway groove penetrates the variable diameter channel and is located on the side wall of the variable diameter area to connect the variable diameter area with the cavity.

6. An aerosol generating article according to claim 5, wherein the airway groove surrounds the circumference of the variable diameter channel.

7. An aerosol generating product according to claim 1 or 2, wherein the variable diameter channel has an air flow inlet at one end close to the aerosol generating substrate segment, and the variable diameter channel has an air flow outlet at one end away from the aerosol generating substrate segment, and the cross-sectional dimension of one of the air flow inlet and the air flow outlet is the maximum cross-sectional dimension of the variable diameter channel, and the cross-sectional dimension of the other is the minimum cross-sectional dimension of the variable diameter channel.

8. The aerosol generating article according to claim 7, wherein the cross-sectional size of the variable diameter channel gradually decreases or increases from the airflow inlet to the airflow outlet.

9. According to the aerosol generating product according to claim 8, along the extension direction, the variable diameter channel has an initial section closest to the aerosol generating substrate section and a terminal section farthest from the aerosol generating substrate section, the initial section has the air flow inlet, and the terminal section has the air flow outlet.

10. The aerosol generating product according to claim 9, wherein the initial segment and the final segment are both equal-diameter structures, the cross-sectional dimension of one of the initial segment and the final segment is the maximum cross-sectional dimension, and the cross-sectional dimension of the other of the initial segment and the final segment is the minimum cross-sectional dimension.

11. The aerosol generating article according to claim 10, wherein the cross-sectional area ratio of the maximum cross-sectional dimension to the minimum cross-sectional dimension is 2-5:1-2.

12. The aerosol generating article according to claim 7, wherein along the extension direction, the variable diameter channel has an initial section closest to the aerosol generating substrate section and a terminal section farthest from the aerosol generating substrate section; The initial section is a variable diameter structure whose cross-sectional dimension gradually decreases along the extension direction, the final section is a constant diameter structure, and the maximum cross-sectional dimension of the initial section is greater than the cross-sectional dimension of the final section; or, The initial section is a constant diameter structure, and the final section is a variable diameter structure whose cross-sectional size gradually increases along the extension direction. The cross-sectional size of the initial section is smaller than the maximum value of the cross-sectional size of the final section.

13. The aerosol generating article according to claim 7, wherein along the extension direction, the variable diameter channel has an initial section closest to the aerosol generating substrate section and a final section farthest from the aerosol generating substrate section, and both the initial section and the final section are variable diameter structures; The cross-sectional dimensions of the initial segment and the cross-sectional dimensions of the final segment both gradually decrease along the extension direction, and the maximum value of the cross-sectional dimension of the initial segment is greater than the minimum value of the cross-sectional dimension of the final segment; or, The cross-sectional dimensions of the initial segment and the cross-sectional dimensions of the final segment both gradually increase along the extending direction, and the minimum value of the cross-sectional dimension of the initial segment is smaller than the maximum value of the cross-sectional dimension of the final segment.

14. According to the aerosol generating product according to claim 7, along the extension direction, the variable diameter channel has an initial section closest to the aerosol generating substrate section, a terminal section farthest from the aerosol generating substrate section, and a middle section located between the initial section and the terminal section, and the cross-sectional size of the middle section is less than or equal to the maximum cross-sectional size and greater than or equal to the minimum cross-sectional size.

15. An aerosol generating article according to claim 1 or 2, wherein the cross-sectional dimensions of the variable diameter channel alternately change along the extension direction.

16. The aerosol generating article according to claim 15, wherein the cross-sectional dimension of the variable diameter channel gradually decreases and then gradually increases along the extension direction; or, The cross-sectional size of the variable diameter channel gradually increases and then gradually decreases along the extending direction.

17. The aerosol generating article according to claim 15, wherein along the extension direction, the variable diameter channel has at least three equal diameter sections, and the equal diameter sections are arranged alternately according to the size of the cross-sectional dimensions; The variable diameter channel further comprises a variable diameter section located between two adjacent equal diameter sections, and a cross-sectional dimension of the variable diameter section transitions from one of the two adjacent equal diameter sections to the other.

18. According to the aerosol generating product according to claim 15, along the extension direction, the variable diameter channel has at least two variable diameter sections and a constant diameter section located between two adjacent variable diameter sections, and among the two adjacent variable diameter sections, the cross-sectional size of one of the variable diameter sections gradually decreases along the extension direction, and the cross-sectional size of the other variable diameter section gradually increases along the extension direction.

19. The aerosol generating product according to claim 15, wherein along the extension direction, at least a portion of the inner side wall of the variable diameter channel is sinusoidal; the inner side wall of the sinusoidal waveform has peaks and troughs, and the total number of the peaks and the troughs is 5 to 15.

20. The aerosol generating product according to claim 1 or 2, wherein the aerosol generating substrate segment is an integral structure having at least one air channel therein, and the air channel runs through at least one of the two opposite ends of the aerosol generating substrate segment along the flow direction of the airflow.

21. The aerosol generating article according to claim 1 or 2, wherein the aerosol generating substrate segment and the functional segment are coaxially arranged cylinders, and the extending direction is the axial direction of the aerosol generating substrate segment and the functional segment.

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