Cooling section and aerosol generating product

Abstract

The embodiment of the utility model provides a cooling section and an aerosol generating product, the cooling section is a silica gel product with a first airflow channel, and the first airflow channel penetrates through a first end and a second end, opposite to each other in a first direction, of the cooling section; and the overflowing area of at least partial region of the first airflow channel is changed in the extending direction of the first airflow channel. According to the embodiment of the invention, the cooling section only has relatively good stability, and the extraction efficiency and the cooling effect of the aerosol can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smoking, in particular to a cooling segment and an aerosol generating article. BACKGROUND

[0002] Generally, an aerosol generating article generates aerosol by heating without combustion. Specifically, an aerosol generating substrate segment is arranged in the aerosol generating article, and the aerosol generating article is heated by a heating element in an aerosol generating device, so that the aerosol generating substrate segment is just heated to a degree sufficient to release fragrance, but the aerosol generating substrate segment does not burn.

[0003] Since the aerosol generated after the aerosol generating substrate segment is heated has a high temperature, in order to avoid the high-temperature aerosol from bringing bad experiences such as burning mouth, irritation, and dry burning sensation to the user, the aerosol generating article generally needs to be provided with a cooling segment, and the aerosol passes through the cooling segment to reduce the temperature.

[0004] However, the cooling segment in the related art is generally a simple hollow structure, and the adaptability of the cooling segment to the aerosol generating substrate segment is poor, and it is difficult to timely transport the aerosol, so that the aerosol generating article is prone to liquid leakage due to accumulation, adsorption and condensation of the aerosol.

[0005] In addition, the cooling segment in the related art is generally made of paper, PET (polyethylene terephthalate), acetate fiber, polylactic acid fiber and other materials. The melting point of these materials is relatively low, and they are easy to melt and block the airflow channel in the cooling segment after being heated, so that the cooling effect of the cooling segment is poor. CONTENT OF THE UTILITY MODEL

[0006] Therefore, an embodiment of the present application aims to provide a cooling segment and an aerosol generating article which not only have good stability, but also can improve the extraction efficiency and cooling effect of the aerosol.

[0007] To achieve the above-mentioned purpose, an embodiment of the present application provides a cooling segment for an aerosol generating article, wherein the cooling segment is a silica gel product having a first airflow channel, the first airflow channel penetrates through a first end and a second end of the cooling segment which are opposite in a first direction, and the flow area of at least a partial region of the first airflow channel changes in the extension direction of itself.

[0008] In an embodiment, the flow area of the at least partial region of the first airflow channel gradually increases in a direction away from the first end.

[0009] In an embodiment, the first airflow channel is located inside the cooling segment; or,

[0010] The first airflow channel is located on the outer surface of the cooling section; or

[0011] The number of the first airflow channels is multiple, and a part of the first airflow channels are located inside the cooling section, and another part of the first airflow channels are located on the outer surface of the cooling section.

[0012] In an embodiment, the first airflow channel penetrates the center of the cooling section.

[0013] In an embodiment, the cooling section further has multiple second airflow channels, the second airflow channels are equal cross-section structures; multiple second airflow channels are arranged on the outer circumferential side of the first airflow channel, and each second airflow channel penetrates the first end and the second end of the cooling section.

[0014] In an embodiment, the number of the first airflow channels is multiple, and multiple first airflow channels are arranged on the outer surface of the cooling section in the circumferential direction of the cooling section.

[0015] In an embodiment, the cooling section is one of an extrusion molding structure, a compression molding structure, an injection molding structure, and a drop glue molding structure; and / or,

[0016] The material of the cooling section is one of methyl silicone rubber, methyl vinyl silicone rubber, methyl vinyl phenyl silicone rubber, nitrile silicone rubber, and fluorosilicone rubber.

[0017] In an embodiment, the cooling section has a flavor additive.

[0018] In an embodiment, the flavor additive includes tobacco essence, mint essence, fruit essence, and flower essence.

[0019] In an embodiment, the ratio of the maximum value to the minimum value of the flow area of the first airflow channel is greater than 1 and less than or equal to 4; and / or,

[0020] The ratio of the flow area of the first airflow channel to the cross-sectional area of the cooling section is 0.15-0.6; and / or,

[0021] The length dimension of the cooling section in the first direction is 5-40 mm; and / or,

[0022] The first airflow channel is located inside the cooling section, and the wall thickness of the first airflow channel is greater than or equal to 0.4 mm.

[0023] In an embodiment, the decomposition temperature of the cooling section is greater than or equal to 300℃; and / or,

[0024] the water content of the cooling section is 1.0% to 4.0%; and / or,

[0025] the hardness of the cooling section is greater than or equal to 80%.

[0026] Another embodiment of the present application provides an aerosol generating article, comprising:

[0027] an aerosol generating substrate section;

[0028] a functional section provided at one end of the aerosol generating substrate section, the functional section comprising the cooling section described above, the first end of the cooling section facing the aerosol generating substrate section;

[0029] an outer wrapper wrapped around the functional section and the aerosol generating substrate section.

[0030] In one embodiment, the functional section further comprises a filter section provided at one end of the cooling section away from the aerosol generating substrate section.

[0031] In one embodiment, the functional section further comprises a support section provided at the first end or the second end of the cooling section; and / or,

[0032] The functional section further comprises a hollow tube section having a hollow channel, the hollow tube section being provided at the first end or the second end of the cooling section.

[0033] Embodiments of the present application provide a cooling section and an aerosol generating article. The cooling section is a silica gel article having a first airflow channel. The silica gel has a high decomposition temperature and a high specific heat capacity, and is highly heat resistant. Therefore, the cooling section uses silica gel as the main material and is less likely to melt and block the first airflow channel, thereby improving the stability of the cooling section. In addition, the cross-sectional area of at least part of the first airflow channel changes in the extension direction of the first airflow channel. Therefore, when the aerosol flows through the first airflow channel, a strong turbulent flow is formed in the first airflow channel. When the aerosol flows through an area with a relatively small cross-sectional area, the flow rate of the aerosol is relatively fast. When the aerosol flows through an area with a relatively large cross-sectional area, the flow resistance of the aerosol is relatively small. The aerosol can collide with air more violently, so that the air can absorb more heat from the aerosol. Therefore, the extraction efficiency of the aerosol is improved, and the cooling effect of the aerosol is also improved. Therefore, the cooling section of the present application has good stability, and can improve the extraction efficiency and cooling effect of the aerosol. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 FIG. 1 is a schematic view of a first aerosol generating article according to an embodiment of the present application;

[0035] Figure 2 For Figure 1 A cross-sectional view of the aerosol generating article shown in FIG. 1, wherein the dashed arrow indicates the flow direction of the aerosol;

[0036] Figure 3 For Figure 1 A cross-sectional view of the aerosol generating article shown in FIG. 1, wherein the dashed arrow indicates the flow direction of the aerosol;

[0037] Figure 4 For Figure 3 A cross-sectional view of the first cooling section shown in FIG. 2;

[0038] Figure 5 For Figure 4 A cross-sectional view of the cooling section shown in FIG. 3, wherein the dashed arrow indicates the flow direction of the aerosol; Figure 4

[0039] Figure 6 A cross-sectional view of the second cooling section of the present application;

[0040] Figure 7 A cross-sectional view of the third cooling section of the present application;

[0041] Figure 8 A cross-sectional view of the fourth cooling section of the present application;

[0042] Figure 9 A cross-sectional view of the second aerosol generating article of the embodiment of the present application;

[0043] Figure 10 For Figure 9 A cross-sectional view of the fifth cooling section shown in FIG. 6;

[0044] Figure 11 For Figure 10 A cross-sectional view of the cooling section shown in FIG. 7, wherein the dashed arrow indicates the flow direction of the aerosol; Figure 10

[0045] Figure 12 A cross-sectional view of the sixth cooling section of the present application;

[0046] Figure 13 A cross-sectional view of the seventh cooling section of the present application;

[0047] Figure 14 A cross-sectional view of the third aerosol generating article of the embodiment of the present application;

[0048] Figure 15 A cross-sectional view of the fourth aerosol generating article of the embodiment of the present application.

[0049] Explanation of Reference Numerals

[0050] ​​10, aerosol generating substrate segment; 10a, air passage; 20, functional segment; 21, temperature reduction segment; 21a, first airflow passage; X1, first end; X2, second end; 21b, second airflow passage; 22, filter segment; 23, support segment; 24, hollow tube segment; 24a, hollow passage; 30, outer wrapping layer. DETAILED DESCRIPTION

[0051] In the description of the embodiments of the present application, it should be noted that the terms "first direction" and the like indicate the orientation or positional relationship based on the drawings shown in the description of the embodiments of the present application. 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. Figure 3

[0052] The embodiments of the present application provide an aerosol generating article, please refer to Figures 1 to 3 The aerosol generating article includes an aerosol generating substrate segment 10, a functional segment 20, and an outer wrapping layer 30. The functional segment 20 is arranged at one end of the aerosol generating substrate, and the outer wrapping layer 30 is wrapped around the outer circumferential side of the functional segment 20 and the aerosol generating substrate.

[0053] 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 a combination of more than one of the following materials: fiber paper, metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, polyethylene (PE), polybutylene adipate-co-terephthalate (PBAT), and the like.

[0054] The aerosol generating substrate segment 10 is atomized by the heating element of the aerosol generating device, and releases an aerosol for a user to smoke or for medical, cosmetic, etc.

[0055] There are various heating methods for the heating element, for example, the heating methods include center heating and peripheral heating. The center heating method refers to inserting the heating element into the inside of the aerosol generating substrate segment 10 to perform baking heating on the aerosol generating substrate segment 10. The peripheral heating method refers to arranging the heating element on the periphery of the aerosol generating substrate segment 10 to perform baking heating on the aerosol generating substrate segment 10. These heating methods can be resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, etc., which are not limited here.

[0056] ​The specific structure of the aerosol generating substrate segment 10 is not limited here. Exemplarily, the aerosol generating substrate segment 10 can be made of the atomization medium itself, for example, made of a smoking flavor medium. In other embodiments, the aerosol generating substrate segment 10 can also include a substrate and an atomization medium arranged on the substrate. The substrate can be, for example, a high-temperature-resistant carbon fiber. In this way, by arranging the substrate, the strength of the aerosol generating substrate segment 10 can be improved, and a certain degree of high temperature can be withstood without producing an odor.

[0057] The specific composition of the aerosol generating substrate segment 10 is not limited here. Exemplarily, in an embodiment, the aerosol generating substrate segment 10 can include plant components, auxiliary components, smoking agent components, adhesive components, and the like.

[0058] In an embodiment, the plant component is one or a combination of powders formed after crushing processing of tobacco raw materials, tobacco fragments, tobacco stems, tobacco fines, and flavor plants. The plant component is the core source of product flavor. Endogenous substances in the plant component, such as nicotine, enter the human blood through atomization, promote the pituitary gland to produce dopamine, and thus obtain a physiological satisfaction feeling.

[0059] In an embodiment, the auxiliary component can be one or a combination of inorganic fillers, lubricants, and emulsifiers. The inorganic filler includes one or a combination of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomite. The inorganic filler can provide skeletal support for the plant component. Meanwhile, the inorganic filler has micropores, which can increase the porosity of the wall material after the plant component is formed, thereby increasing the aerosol release rate.

[0060] The lubricant includes one or a combination of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, and palmitic acid. The lubricant can increase the flowability of the particles, reduce the friction between the particles, make the overall density of the particle distribution more uniform, and reduce the pressure required for mold forming and the wear of the mold.

[0061] The emulsifier includes one or a combination of polyglycerol fatty acid ester, Tween-80, and polyvinyl alcohol. The emulsifier can slow down the loss of flavor substances during storage to some extent, increase the stability of flavor substances, and improve the sensory quality of the product. The emulsifier (also known as a surfactant) can reduce the interfacial tension between water-soluble and water-insoluble components in the mixed system, and form a relatively strong film on the surface of the droplets or a double electric layer on the surface of the droplets due to the charge given by the emulsifier, preventing the droplets from aggregating with each other and maintaining a uniform emulsion. The homogenization of two immiscible components can improve the consistency of product quality.

[0062] The function of the smoking agent component is to generate a large amount of steam when heated, thereby increasing the amount of smoke of the smoking article. In an embodiment, the smoking agent may, for example, include one or more combinations of monohydric alcohols (such as menthol), polyhydric alcohols (such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol), esters of polyhydric alcohols (such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate), monocarboxylic acids, polycarboxylic acids (such as lauric acid, myristic acid), or fatty esters of polycarboxylic acids (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butanediol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triactin, meso-erythritol, glycerol diacetate, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenyl acetate, ethyl vanillate, glycerol tributyrate, lauryl acetate).

[0063] In an embodiment, the binder component is a natural plant extract, a non-ionized modified viscous polysaccharide, including one or more combinations of jambuai polysaccharide, pullulan, fucoidan, locust bean gum, guar gum, xyloglucan. The binder is in close contact by wetting the interface with the component materials of the product, generating intermolecular attractive forces, thereby playing a role in binding the powders, liquids, etc. of the component materials. At the same time, the use of a natural plant extract, a non-ionized binder, can avoid the release of harmful substances such as methanol, formaldehyde, and propylene aldehyde caused by colloid modification, thereby improving the safety of the product.

[0064] By way of example, the aerosol generating substrate segment 10 can be a granular aggregate, which is a reconstituted tobacco medium, for example, a reconstituted tobacco medium containing a smoking agent, tobacco, and the like. The aerosol generating substrate segment 10 of the granular aggregate is an integrated medium when heated for smoking or when heating is stopped, and is not prone to disintegration and falling. This solves the problems of the thin sheet, filament, or granular aerosol generating substrate segment in the prior art, such as thin sheet loosening, filament components, granular components falling off, and difficulty in cleaning.

[0065] The shape of the aerosol generating substrate segment 10 is not limited, and by way of example, the aerosol generating substrate segment 10 can be cylindrical. The shape of the cross section of the cylindrical aerosol generating substrate segment 10 can be circular, polygonal (including but not limited to triangular, square, prismatic, etc.), elliptical, racetrack-shaped, irregular, etc., wherein irregular refers to other symmetrical or asymmetrical shapes other than the shapes listed above.

[0066] Referring to Figure 3 The inside of the aerosol generating substrate segment 10 can also have at least one air channel 10a, which penetrates at least one of the opposite ends of the aerosol generating substrate segment 10 (i.e., one end close to the functional segment 20 and one end away from the functional segment 20).

[0067] Figure 3 The air passage 10a can extend through both ends of the aerosol generating substrate segment 10, or the air passage 10a can extend through only one end of the aerosol generating substrate segment 10 close to the functional segment 20, and the other end can be a closed end. Alternatively, the air passage 10a can extend through only one end of the aerosol generating substrate segment 10 away from the functional segment 20, and the other end can be a closed end.

[0068] Compared with the case where the air passage 10a extends through one end of the aerosol generating substrate segment 10, the case where the air passage 10a extends through both ends of the aerosol generating substrate segment 10 is more conducive to reducing the suction resistance of the user.

[0069] The number of air passages 10a can be one or multiple.

[0070] The air passage 10a can be a straight-through air passage 10a as shown in Figure 3 The straight-through air passage 10a is an air passage 10a extending along a straight line, or in other words, the extension direction of the straight-through air passage 10a is a straight line.

[0071] The air passage 10a can also be a spiral air passage 10a, which is an air passage 10a having a curvature of a curve other than 0 along at least part of the extension direction. For example, along the extension direction of the spiral air passage 10a, the spiral air passage 10a can have a structure with both a curve segment having a curvature other than 0 and a straight line segment having a curvature of 0, or a structure with only a curve segment having a curvature other than 0 and no straight line segment having a curvature of 0. That is, as long as the spiral air passage 10a does not extend along a straight line from the starting point to the end point of the spiral air passage 10a along the extension direction.

[0072] When the number of air passages 10a is multiple, some of the air passages 10a can be straight-through air passages 10a, and the other air passages 10a can be spiral air passages 10a.

[0073] The shape of the cross section of the air passage 10a is not limited, such as a circular shape, a polygonal shape (including but not limited to a triangular shape, a square shape, a prismatic shape, etc.), an oval shape, a runway shape, or a special shape, etc.

[0074] Taking the aerosol generating article as shown in Figure 3 When the aerosol generating substrate segment 10 is heated, the aerosol generating substrate segment 10 releases aerosol. Since at least part of the micropores or gaps in the wall material of the aerosol generating substrate segment 10 are connected to the air passage 10a, the aerosol released by the aerosol generating substrate segment 10 can enter the air passage 10a through the micropores or gaps connected to the air passage 10a, and flow to the functional segment 20 from the air passage 10a.

[0075] Please continue to refer to Figures 3 to 13The functional segment 20 includes a cooling segment 21, which is a silica gel product having a first airflow passage 21a extending through the cooling segment 21 along a first direction opposite a first end X1 and a second end X2 of the cooling segment 21.

[0076] The first airflow passage 21a is configured to allow the aerosol to pass through so that the aerosol is cooled in the first airflow passage 21a.

[0077] Please refer to Figure 3 and Figure 4 The first end X1 of the cooling segment 21 is configured to face the aerosol generating substrate segment 10. During a puffing process of a user, the aerosol enters the first airflow passage 21a from the first end X1 of the cooling segment 21, is cooled in the first airflow passage 21a, and then flows out of the second end X2 of the cooling segment 21 to the oral cavity of the user.

[0078] The cooling segment 21 of the present application is a silica gel product processed by using food-grade silica gel as a main material. Exemplarily, the food-grade silica gel can be a combination of one or more of methyl silicone rubber, methyl vinyl silicone rubber, methyl vinyl phenyl silicone rubber, nitrile silicone rubber, and fluorosilicone rubber.

[0079] The cooling segment 21 can be one of an extrusion molding structure, a compression molding structure, an injection molding structure, and a drop molding structure, that is, the cooling segment 21 can be manufactured by using an extrusion molding, a compression molding, an injection molding, a drop molding, or the like. Among them, the injection molding has a higher production efficiency, a better product quality, and a lower production cost, and thus the injection molding is a more preferred molding method.

[0080] The length of the cooling segment 21 along the first direction can be designed as needed. However, if the length of the cooling segment 21 along the first direction is too short, it is not convenient for processing and manufacturing, and if the length of the cooling segment 21 along the first direction is too long, it affects the extraction efficiency of the aerosol. Therefore, more preferably, the length of the cooling segment 21 along the first direction can be 5 mm to 40 mm (including the end point value), such as 5 mm, 10 mm, 20 mm, 30 mm, 40 mm, or the like.

[0081] The outer diameter of the cooling segment 21 is generally determined according to the outer diameter of the aerosol generating article. Exemplarily, the outer diameter of the cooling segment 21 can be 3 mm to 8 mm (including the end point value), such as 3 mm, 5 mm, 6 mm, 8 mm, or the like.

[0082] It should be noted that the outer diameter of the cooling section 21 refers to the size used to calculate the cross-sectional area of the cooling section 21. When the cross-sectional shape of the cooling section 21 is circular, the outer diameter refers to the diameter of the cross-section. When the cross-sectional shape of the cooling section 21 is non-circular, there are generally multiple sizes for calculating the cross-sectional area, and the outer diameter refers to the largest size.

[0083] The hardness of the cooling section 21 can be adjusted as needed. For example, the hardness of the cooling section 21 can be greater than or equal to 80% (including the endpoint value), such as 80%, 90%, 95%, 99%, etc.

[0084] The hardness of the cooling section 21 described above refers to the percentage change in the outer diameter of the cooling section 21 after the cooling section 21 is subjected to a certain pressure in the radial direction.

[0085] The moisture content of the cooling section 21 can be adjusted as needed. For example, the moisture content of the cooling section 21 can be 1.0% to 4.0% (including the endpoint value), such as 1.0%, 2.0%, 3.0%, 4.0%, etc.

[0086] Due to factors such as the type of silica gel, the preparation method, and the chemical composition, there is a certain difference in the decomposition temperature of the cooling section 21. However, since the cooling section 21 is a silica gel product, and the decomposition temperature of silica gel is generally relatively high, according to the characteristics of silica gel, the decomposition temperature of the cooling section 21 is generally also greater than or equal to 300°C.

[0087] Silica gel not only has a relatively high decomposition temperature, but also has a high specific heat capacity and strong heat resistance. Therefore, the cooling section 21 uses silica gel as the main material and is not easily melted and clogged by heat, thereby enabling the cooling section 21 to have good stability.

[0088] In addition, the surface of silica gel is smooth and has low adsorption, and when the aerosol passes through the first airflow passage 21a, the adsorption and retention rate of silica gel to the aerosol is also low. Therefore, the cooling section 21 of the present application can also reduce the adsorption and retention rate of the aerosol.

[0089] In some embodiments, the cooling section 21 can also have a flavor additive. The flavor additive includes but is not limited to tobacco essence, mint essence, fruit essence, and floral essence. For example, the flavor additive can be mixed uniformly with the raw material of the silica gel and then molded together. The flavor additive can enrich the taste of the aerosol to meet the smoking needs of different users.

[0090] Please continue to refer to Figures 3 to 13 The flow area of at least part of the first airflow passage 21a of the present application changes in the extension direction of itself.

[0091] The flow area refers to the area of the cross section of the first airflow channel 21a perpendicular to the extension direction of the first airflow channel 21a.

[0092] The flow area of at least a partial region of the first airflow channel 21a varies in the extension direction of the first airflow channel 21a, which means that the flow area of at least one position of the first airflow channel 21a is different from the flow area of other positions, that is, the first airflow channel 21a is a variable cross-section structure with varying flow area. The extension direction of the first airflow channel 21a can be parallel to the first direction or intersected with the first direction.

[0093] Referring to Figures 4 to 8 , Figures 11 to 13 , the number of the first airflow channel 21a can be one or multiple.

[0094] The shape of the cross section of the first airflow channel 21a can be circular, polygonal (including but not limited to triangular, square, prismatic, etc.), oval, runway-shaped, special-shaped, etc., wherein the special-shaped refers to other symmetrical or asymmetrical shapes other than the shapes listed above.

[0095] Referring to Figures 4 to 8 , the first airflow channel 21a can be located inside the cooling section 21, referring to Figures 11 to 13 , the first airflow channel 21a can also be located on the outer surface of the cooling section 21.

[0096] When the number of the first airflow channel 21a is multiple, all the first airflow channels 21a can be located inside the cooling section 21, all the first airflow channels 21a can be located on the outer surface of the cooling section 21, or part of the first airflow channels 21a can be located inside the cooling section 21 and the other part of the first airflow channels 21a can be located on the outer surface of the cooling section 21.

[0097] For the first airflow channel 21a located inside the cooling section 21, in order to avoid that the wall thickness of the first airflow channel 21a is too small to cause insufficient support of the cooling section 21, preferably, the wall thickness of the first airflow channel 21a can be greater than or equal to 0.4 mm.

[0098] Referring to Figure 9 , for the first airflow channel 21a located on the outer surface of the cooling section 21, the first airflow channel 21a is actually a groove structure passing through the outer surface of the cooling section 21. However, since the outer wrapping layer 30 wraps around the outer circumferential side of the cooling section 21, the slot opening of the first airflow channel 21a towards the outer wrapping layer 30 will be blocked by the outer wrapping layer 30, thus the aerosol can still flow along the first airflow channel 21a.

[0099] To ensure that the aerosol can flow smoothly in the first airflow channel 21a located on the outer surface of the cooling section 21, preferably, the depth of the first airflow channel 21a can be 0.06mm-1.5mm (including the end point value), for example, the depth of the first airflow channel 21a can be 0.06, 0.1, 0.5, 1.0, 1.5, etc.

[0100] The ratio of the flow area of the first airflow channel 21a to the cross-sectional area of the cooling section 21 can be designed as needed (it should be noted that when the number of first airflow channels 21a is more than one, the flow area of the first airflow channel 21a refers to the sum of the flow areas of each first airflow channel 21a), but when the ratio of the flow area of the first airflow channel 21a to the cross-sectional area of the cooling section 21 is less than 0.15, the resistance is large, the smoke volume is small, and the suction is affected; when the ratio of the flow area of the first airflow channel 21a to the cross-sectional area of the cooling section 21 is greater than 0.6, the flow area of the first airflow channel 21a is large, the resistance is small, the suction is empty, and the heat capacity of the silica gel is also small, thereby causing the aerosol cooling effect to be relatively poor, therefore, preferably, the ratio of the flow area of the first airflow channel 21a to the cross-sectional area of the cooling section 21 can be 0.15-0.6 (including the end point value), for example, the ratio of the flow area of the first airflow channel 21a to the cross-sectional area of the cooling section 21 can be 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, etc.

[0101] The flow area of at least part of the first airflow channel 21a varies in its extension direction, which can form a certain pressure difference in the first airflow channel 21a, so that during the flow of the aerosol through the first airflow channel 21a, a strong turbulent flow can be formed in the first airflow channel 21a. When the aerosol flows through the area with relatively small flow area, the flow rate of the aerosol is fast, and when the aerosol flows through the area with relatively large flow area, the flow resistance of the aerosol is small, and the aerosol can collide with the air more violently, so that the air can absorb the heat of the aerosol more fully, thereby improving the extraction efficiency of the aerosol and the cooling effect of the aerosol.

[0102] In addition, when the ratio of the maximum value to the minimum value of the flow area of the first airflow channel 21a is greater than 1 and less than or equal to 4, the Venturi effect that is beneficial to the flow of the aerosol is more likely to be formed in the first airflow channel 21a, therefore, preferably, the ratio of the maximum value to the minimum value of the flow area of the first airflow channel 21a can be greater than 1 and less than or equal to 4, for example, the ratio of the maximum value to the minimum value of the flow area of the first airflow channel 21a can be 1.2, 1.5, 2, 3, 4, etc.

[0103] In an embodiment, please refer to Figures 4 to 8 ,Figures 10 to 13 The flow area of at least a partial region of the first airflow passage 21a can gradually increase in a direction away from the first end X1 of the cooling segment 21. That is, for a region in which the flow area changes in the extension direction thereof, the closer to the first end X1 of the cooling segment 21, the smaller the flow area, and the farther to the first end X1 of the cooling segment 21, the larger the flow area.

[0104] Figure 6 The flow area of the entire first airflow passage 21a shown gradually increases from the first end X1 to the second end X2 of the cooling segment 21, and in other embodiments, a partial region of the first airflow passage 21a can also gradually increase in a direction away from the first end X1.

[0105] Since the aerosol enters the first airflow passage 21a from the first end X1 of the cooling segment 21, the flow area of at least a partial region of the first airflow passage 21a gradually increasing in a direction away from the first end X1 can make the aerosol first increase in flow rate in a region with a relatively small flow area and then be cooled in a region with a relatively large flow area, thereby more favorably improving the extraction efficiency of the aerosol.

[0106] In other embodiments, the flow area of at least a partial region of the first airflow passage 21a can also gradually decrease in a direction away from the first end X1 of the cooling segment 21, or the flow area of the first airflow passage 21a can also adopt other change modes, as long as the first airflow passage 21a can form a variable cross-section structure.

[0107] In an embodiment, referring to Figures 3 to 6 The first airflow passage 21a can pass through the center of the cooling segment 21.

[0108] In some heating modes, the aerosol first flows out from the central region of the aerosol generating substrate segment 10 (such as an aerosol generating substrate segment 10 heated by a central heating mode), and for such an aerosol generating substrate segment 10, the first airflow passage 21a passing through the center of the cooling segment 21 can make the aerosol enter the first airflow passage 21a in time for cooling, thereby also favorably improving the extraction efficiency of the aerosol.

[0109] In an embodiment, referring to Figure 7 and Figure 8 In addition to the first airflow passage 21a passing through the center of the cooling segment 21, the cooling segment 21 can also have a plurality of second airflow passages 21b, the plurality of second airflow passages 21b being arranged on the outer periphery side of the first airflow passage 21a, and each second airflow passage 21b passing through the first end X1 and the second end X2 of the cooling segment 21.

[0110] The second airflow passage 21b is also used for the aerosol to pass through, so that the aerosol is cooled in the second airflow passage 21b.

[0111] The second airflow passage 21b is of an equal cross-section structure, that is, the flow area of the second airflow passage 21b at any position is equal.

[0112] Figure 7 And Figure 8 The second airflow passage 21b shown in the figure is located on the outer surface of the cooling section 21, and in other embodiments, the second airflow passage 21b can also be located inside the cooling section 21.

[0113] The number of the second airflow passages 21b can be designed as required, and preferably, the number of the second airflow passages 21b can be 2-25 (including the end point value), such as 2, 5, 10, 15, 20, 25, etc.

[0114] The ratio of the sum of the flow areas of the second airflow passages 21b to the flow area of the first airflow passage 21a at the same cross-section of the cooling section 21 can be designed as required, and preferably, the ratio of the sum of the flow areas of the second airflow passages 21b to the flow area of the first airflow passage 21a can be 0.3-1 (including the end point value), such as 0.3, 0.5, 0.7, 1, etc.

[0115] Under some heating modes, the aerosol can flow out from each part of the aerosol generating substrate section 10 relatively uniformly, and therefore, the cooling section 21 is provided with multiple second airflow passages 21b on the outer peripheral side of the first airflow passage 21a, so that the aerosol flowing out from each part of the aerosol generating substrate section 10 can all enter the first airflow passage 21a and the second airflow passage 21b in time for cooling, thereby also improving the extraction efficiency of the aerosol.

[0116] In other embodiments, the second airflow passage 21b can not be provided, such as multiple first airflow passages 21a, one of which penetrates the center of the cooling section 21, and the others of which are arranged on the outer peripheral side of the first airflow passage 21a penetrating the center of the cooling section 21, that is, the first airflow passage 21a can also replace the second airflow passage 21b.

[0117] In an embodiment, please refer to Figures 10 to 13 The outer surface of the cooling section 21 can be provided with multiple first airflow passages 21a, and the multiple first airflow passages 21a are arranged along the circumference of the cooling section 21.

[0118] The number of the first airflow passages 21a can be designed as required, and preferably, the number of the first airflow passages 21a can be 2-25 (including the end values), for example, the number of the first airflow passages 21a can be 2, 5, 10, 15, 20, 25, etc.

[0119] Referring to Figures 11 to 13 , the plurality of first airflow passages 21a can be arranged in a ring shape along the circumference of the cooling section 21. In order to facilitate the processing and manufacturing of the cooling section 21, preferably, referring to Figures 11 to 13 , the shape of the cross section of the cooling section 21 can be substantially gear-shaped.

[0120] In some heating modes, the aerosol will flow out from the vicinity of the outer sidewall of the aerosol generating substrate section 10 first (for example, the aerosol generating substrate section 10 heated by the peripheral heating mode), and for such an aerosol generating substrate section 10, the plurality of first airflow passages 21a are arranged on the outer surface of the cooling section 21 along the circumference of the cooling section 21, which can also enable the aerosol to enter the first airflow passages 21a in time for cooling, thereby also improving the extraction efficiency of the aerosol.

[0121] In other embodiments, the plurality of first airflow passages 21a can also be arranged inside the cooling section 21 along the circumference of the cooling section 21, and such a cooling section 21 is also suitable for use with the aerosol generating substrate section 10 in which the aerosol flows out from the vicinity of the outer sidewall first.

[0122] In an embodiment, referring to Figure 2 and Figure 3 , the functional section 20 can further include a filter section 22, and the filter section 22 is arranged at one end of the cooling section 21 away from the aerosol generating substrate section 10.

[0123] The filter section 22 is used to contact the user's oral cavity during user's suction to filter the aerosol.

[0124] The material of the filter section 22 includes but is not limited to one or more combinations of PE, PLA (Polylactic acid, also known as Polylactide), PBAT, PP (Polypropylene), acetate fiber, and propylene fiber material.

[0125] In other embodiments, the functional section 20 can also not be provided with the filter section 22, for example, the aerosol generating device can be provided with a mouthpiece, which can be reusable or disposable, and the mouthpiece is used in cooperation with the aerosol generating article without the filter section 22 to replace the filter section 22.

[0126] In an embodiment, referring to Figure 14The functional segment 20 can further include a support segment 23, which is mainly used to provide support for the functional segment 20 to improve the structural strength of the functional segment 20, especially at high temperatures.

[0127] For example, the support segment 23 can have good structural strength at a high temperature of 200°C.

[0128] In some scenarios, the support segment 23 can also provide a certain suction resistance.

[0129] The material of the support segment 23 includes but is not limited to silica gel, acetate fiber, PET, plant fiber, non-plant fiber, etc.

[0130] Figure 14 The support segment 23 is shown to be arranged at the first end X1 of the cooling segment 21, that is, the support segment 23 is located between the cooling segment 21 and the aerosol generating substrate segment 10. In other embodiments, the support segment 23 can also be arranged at the second end X2 of the cooling segment 21.

[0131] In other embodiments, the functional segment 20 can also not be provided with the support segment 23.

[0132] In an embodiment, please refer to Figure 15 The functional segment 20 can further include a hollow tube segment 24, which has a hollow channel 24a for the aerosol to pass through to cool down the aerosol in the hollow channel 24a. That is, the hollow tube segment 24 can also be used to cool down the aerosol.

[0133] The material of the hollow tube segment 24 includes but is not limited to silica gel, acetate fiber, PET, plant fiber, non-plant fiber, etc.

[0134] Figure 15 The hollow tube segment 24 is shown to be arranged at the second end X2 of the cooling segment 21. In other embodiments, the hollow tube segment 24 can also be arranged at the first end X1 of the cooling segment 21.

[0135] In other embodiments, the functional segment 20 can also not be provided with the hollow tube segment 24.

[0136] In addition, Figure 14 The functional segment 20 shown is provided with the support segment 23 but not the hollow tube segment 24, Figure 15 The functional segment 20 shown is provided with the hollow tube segment 24 but not the support segment 23. However, the functional segment 20 is not limited to being provided with only one of the support segment 23 and the hollow tube segment 24. In other embodiments, the functional segment 20 can be provided with both the support segment 23 and the hollow tube segment 24.

[0137] In the description of the application, the description of the terms "in an embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referring to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the application can be implemented in any suitable combination of hardware and / or software for any real or theoretical computer system dependent on the particular needs and requirements of the application being implemented. Moreover, the different embodiments or examples of the application can be combined with each other and / or combined with the features of the different embodiments or examples without departing from the scope of the application.

[0138] The above description is merely illustrative of the application, and is not intended to limit the application. The application can be modified and varied in various ways, and it is therefore intended that the application encompass all such modifications and variations as fall within the scope of the application. Any modification or equivalent arrangement made during the life of the application shall be covered by the application.

Claims

1. A cooling section for aerosol-generating products, characterized in that, The cooling section is a silicone product with a first airflow channel. The first airflow channel passes through the first end and the second end of the cooling section opposite to each other in a first direction, and the flow area of ​​at least a portion of the first airflow channel varies in its extension direction.

2. The cooling section according to claim 1, characterized in that, The flow area of ​​at least a portion of the first airflow channel gradually increases in the direction away from the first end.

3. The cooling section according to claim 1 or 2, characterized in that, The first airflow channel is located inside the cooling section; or, The first airflow channel is located on the outer surface of the cooling section; or, There are multiple first airflow channels, some of which are located inside the cooling section and others are located on the outer surface of the cooling section.

4. The cooling section according to claim 1 or 2, characterized in that, The first airflow channel passes through the center of the cooling section.

5. The cooling section according to claim 4, characterized in that, The cooling section also has multiple second airflow channels, each with a uniform cross-section; the multiple second airflow channels surround the outer periphery of the first airflow channel, and each second airflow channel penetrates both the first end and the second end of the cooling section.

6. The cooling section according to claim 1 or 2, characterized in that, The number of first airflow channels is multiple, and the multiple first airflow channels are arranged circumferentially on the outer surface of the cooling section.

7. The cooling section according to claim 1 or 2, characterized in that, The cooling section is one of the following structures: extrusion molding, compression molding, injection molding, and drip molding; and / or, The material of the cooling section is one of methyl silicone rubber, methyl vinyl silicone rubber, methyl vinyl phenyl silicone rubber, nitrile silicone rubber, and fluorosilicone rubber.

8. The cooling section according to claim 1 or 2, characterized in that, The cooling section contains flavor additives.

9. The cooling section according to claim 8, characterized in that, The flavor additives include tobacco flavorings, mint flavorings, fruit flavorings, and floral flavorings.

10. The cooling section according to claim 1 or 2, characterized in that, The ratio of the maximum to the minimum flow area of ​​the first airflow channel is greater than 1 and less than or equal to 4; and / or, The ratio of the flow area of ​​the first airflow channel to the cross-sectional area of ​​the cooling section is 0.15 to 0.6; and / or, The length of the cooling section along the first direction is 5mm to 40mm; and / or, The first airflow channel is located inside the cooling section, and the wall thickness of the first airflow channel is greater than or equal to 0.4 mm.

11. The cooling section according to claim 1 or 2, characterized in that, The decomposition temperature of the cooling section is greater than or equal to 300℃; and / or, The moisture content of the cooling section is 1.0% to 4.0%; and / or, The hardness of the cooling section is greater than or equal to 80%.

12. An aerosol-generating product, characterized in that, include: Aerosol generation matrix segment; A functional segment is disposed at one end of the aerosol generating matrix segment, the functional segment including a cooling segment as described in any one of claims 1-11, wherein the first end of the cooling segment faces the aerosol generating matrix segment; An outer wrapping layer is provided, which wraps around the outer periphery of the functional segment and the aerosol generating matrix segment.

13. The aerosol-generating product according to claim 12, characterized in that, The functional section also includes a filtration section, which is located at one end of the cooling section away from the aerosol generation matrix section.

14. The aerosol-generating article according to claim 12 or 13, characterized in that, The functional section further includes a support section, which is disposed at the first end or the second end of the cooling section; and / or, The functional section also includes a hollow tube section with a hollow channel, which is disposed at the first end or the second end of the cooling section.

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