WO2024152532A1 - Aerosol-generating substrate and aerosol-generating product - Google Patents

Abstract

An aerosol-generating substrate (10) and an aerosol-generating product, relating to the technical field of vapor-producing products. The aerosol-generating substrate (10) is provided with air holes (1) having at least two cross-sectional shapes, the air holes (1) are provided inside the aerosol-generating substrate (10), and the air holes (1) pass through at least one end of the aerosol-generating substrate (10) in the length direction. By means of the air holes (1) having at least two cross-sectional shapes, the cross-sectional area and the cross-sectional shape of each air hole (1) can be flexibly designed when the size of the aerosol-generating substrate (10) is limited, so that the flow resistance of aerosols can be conveniently regulated and controlled, that is, the inhalation resistance is adjusted when a user inhales, and the adjustment of the mass distribution of a medium at different positions of the aerosol-generating substrate (10) is also facilitated, thereby improving the heating rate and the heating uniformity.

Description

An aerosol generating substrate and an aerosol generating product

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with application number 202310095263.4 and application date January 20, 2023, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference.

Technical Field

The present application relates to the technical field of smoking products, and in particular to an aerosol generating substrate and an aerosol generating product.

Background technique

Smoking articles include smoking articles that form aerosols by ignition and smoking articles that form aerosols by heating without burning. In a typical smoking article that heats without burning, the smoking article contains an aerosol-generating matrix such as tobacco raw materials, flavor raw materials and/or atomizers that can volatilize when heated to produce an aerosol. The smoking article is heated by an external heat source so that the aerosol-generating matrix is heated just to a degree sufficient to emit an aerosol. The aerosol-generating matrix does not burn, and is loaded with a large dose of atomizer. The aerosol-generating matrix is released by high-temperature heating when used to form smoke.

In the related art, the aerosol-generating matrix is prone to problems such as difficulty in suction and uneven heating during the heating process.

Summary of the invention

In view of this, the present application hopes to provide an aerosol generating substrate and an aerosol generating product that can improve heating uniformity.

To achieve the above objectives, the present application provides an aerosol generating substrate, wherein the aerosol generating substrate has pores with at least two cross-sectional shapes, the pores are arranged inside the aerosol generating substrate, and the pores penetrate at least one end of the aerosol generating substrate along the length direction.

In some embodiments, the pores penetrate the opposite ends of the aerosol generating substrate along the length direction; the aerosol generating substrate is divided into a middle portion and an edge portion, the edge portion surrounds the middle portion, the middle portion is arranged with a first set consisting of a plurality of the pores, and the edge portion is arranged with a second set consisting of a plurality of the pores, the cross-sectional shape of each pore of the first set is the same, and the cross-sectional shape of at least one pore of the second set is different from the cross-sectional shape of the pores of the first set.

In some embodiments, the cross-sectional shape of the pores in the first set is circular, and the cross-sectional shape of each pore in the second set is a portion of the cross-sectional shape of the pores in the first set.

In some embodiments, the cross-sectional shape of the pores in the first set is a regular hexagon, and the cross-sectional shape of each pore in the second set is a portion of the cross-sectional shape of the pores in the first set.

In some embodiments, the cross-sectional shape of the pores of the first set is a diamond shape, and the cross-sectional shape of each pore of the second set is a portion of the cross-sectional shape of the pores of the first set.

In some embodiments, the cross-sectional shape of the pores of the first set is a regular quadrilateral, and the cross-sectional shape of each pore of the second set is a portion of the cross-sectional shape of the pores of the first set.

In some embodiments, all pores of the first set are divided into a plurality of pore units, a plurality of pores of the pore units are arranged along a first direction, and a plurality of the pore units are arranged along a second direction, wherein the first direction and the second direction intersect.

In some embodiments, a plurality of pores of the pore unit are arranged in a straight line along a first direction, and a plurality of the pore units are arranged in a straight line along a second direction.

In some embodiments, the plurality of pores of the pore unit are arranged circumferentially along the first direction, and the plurality of pore units are nested one by one along the second direction.

In some embodiments, the cross-sectional shape of at least one of the air holes is a first shape, and the cross-sectional shape of at least one of the air holes is a second shape.

In some embodiments, a portion of the first shape is the same as the second shape.

In some embodiments, there are a plurality of air holes of the first shape and a plurality of air holes of the second shape, and each air hole of the second shape is surrounded by at least two air holes of the first shape.

In some embodiments, the air holes of the first shape and the air holes of the second shape are both multiple;

All the air holes of the first shape are divided into a plurality of first row groups, a plurality of air holes in each of the first row groups are linearly arranged along a first direction, and a plurality of the first row groups are linearly arranged along a second direction; all the air holes of the second shape are divided into a plurality of second row groups, a plurality of air holes in each of the second row groups are linearly arranged along the first direction, and a plurality of the second row groups are linearly arranged along the second direction;

The pores of the first shape and the pores of the second shape are arranged alternately in sequence in the first direction, and the pores of the first shape and the pores of the second shape are arranged alternately in sequence in the second direction.

In some embodiments, an air hole having a cross-sectional shape of a third shape is disposed on the center line of the aerosol generating substrate.

In some embodiments, there are four pores of the first shape and four pores of the second shape, and the four pores of the first shape are symmetrically arranged on two straight lines perpendicular to each other passing through the pores of the third shape, and one pore of the second shape is arranged between two adjacent pores of the first shape.

In some embodiments, the hydraulic diameter of the pores is between 0.05 mm and 6 mm; and/or,

The cross-sectional area of the pores is between 0.0019 mm2 and 30 mm2.

In some embodiments, the cross-sectional shape of the aerosol-generating substrate is circular.

In some embodiments, the aerosol generating substrate has a plurality of micropores, and the plurality of micropores are interconnected and connected to the air pores.

In some embodiments, the aerosol generating substrate comprises a groove disposed on a circumferential surface of the aerosol generating substrate, wherein the groove penetrates at least one end of the aerosol generating substrate along a length direction.

Another aspect of the present application provides an aerosol generating article, comprising:

The aerosol generating substrate as described in any one of the above items;

A functional section, arranged at one end of the aerosol generating substrate along the length direction, the functional section comprising a filtering section for filtering aerosol;

The outer wrapping layer wraps around the periphery of the functional segment and the periphery of the aerosol generating substrate.

In some embodiments, the functional section further includes a cooling section, and the cooling section is located between the filtering section and the aerosol generating substrate.

The aerosol generating substrate provided in the embodiment of the present application is used to generate aerosol by heating. Since the aerosol generating substrate has the need for portability to be held by a user, the size of the aerosol generating substrate is limited. By using pores with at least two cross-sectional shapes, the cross-sectional area and cross-sectional shape of each pore can be flexibly designed when the size of the aerosol generating substrate is limited. This not only facilitates the regulation of the flow resistance of the aerosol, that is, the regulation of the inhalation resistance when the user inhales, but also facilitates the regulation of the medium mass distribution at different positions of the aerosol generating substrate, thereby improving the heating rate and heating uniformity, reducing the situation of burning caused by insufficient heating or excessive heating, and the aerosol can be released as evenly as possible.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a first aerosol generating substrate according to an embodiment of the present application;

FIG2 is a schematic structural diagram of the first aerosol generating substrate shown in FIG1 from another perspective;

FIG3 is a schematic structural diagram of a first aerosol generating product according to an embodiment of the present application;

Fig. 4 is a schematic cross-sectional view along the A-A direction in Fig. 3;

FIG5 is a schematic diagram of the structure of a second aerosol generating substrate according to an embodiment of the present application, wherein the dotted frame schematically shows the pore unit;

FIG6 is a schematic diagram of the structure of a third aerosol generating substrate according to an embodiment of the present application, wherein the dotted frame schematically shows the pore unit;

FIG7 is a schematic structural diagram of a fourth aerosol generating substrate according to an embodiment of the present application;

FIG8 is a schematic diagram of the structure of the fourth aerosol generating substrate shown in FIG7 from another perspective, wherein the dashed box schematically shows the first set;

FIG9 is a schematic structural diagram of a fifth aerosol generating substrate according to an embodiment of the present application;

FIG10 is a schematic structural diagram of the fifth aerosol generating substrate shown in FIG9 from another perspective;

FIG11 is a schematic structural diagram of a sixth aerosol generating substrate according to an embodiment of the present application;

FIG12 is a schematic structural diagram of a seventh aerosol generating substrate according to an embodiment of the present application;

FIG13 is a schematic structural diagram of an eighth aerosol generating substrate according to an embodiment of the present application;

FIG14 is a schematic structural diagram of the eighth aerosol generating substrate shown in FIG13 from another perspective;

FIG15 is a schematic structural diagram of a ninth aerosol generating substrate according to an embodiment of the present application;

FIG16 is a schematic structural diagram of a tenth aerosol generating substrate according to an embodiment of the present application;

FIG17 is a schematic structural diagram of an eleventh aerosol generating substrate according to an embodiment of the present application;

FIG18 is a schematic structural diagram of a twelfth aerosol generating substrate according to an embodiment of the present application;

FIG19 is a cross-sectional view of the first aerosol-generating substrate shown in FIG2 ;

FIG. 20 is a schematic structural diagram of a second aerosol generating product according to an embodiment of the present application.

Detailed ways

It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

1 and 2 , the embodiment of the present application provides an aerosol generating substrate 10. The aerosol generating substrate 10 is used to be heated to generate aerosol.

Exemplarily, the aerosol generating substrate 10 can be used to generate aerosols in a heating and burning manner. The aerosol generating substrate 10 can also be used to generate aerosols in a heating without burning manner. That is, the aerosol generating substrate 10 is heated below the ignition point to generate aerosols. That is, the aerosol generating substrate 10 does not burn during the process of generating aerosols. The embodiments of the present application are illustrated by taking heating without burning as an example.

Please continue to refer to Figures 1 and 2. The aerosol generating substrate 10 has pores 1 with at least two cross-sectional shapes. The pores 1 are arranged inside the aerosol generating substrate 10, and the pores 1 penetrate at least one end of the aerosol generating substrate 10 along the length direction. The pores 1 are used to collect and circulate aerosols. In other words, the types of cross-sectional shapes include two or more. In this way, at least two pores 1 have different cross-sectional shapes.

It should be noted that the cross section of the pore 1 is a plane perpendicular to the flow direction of the pore 1, and the cross section of the pore 1 is also the flow cross section of the pore 1. The cross section may be a plane perpendicular to the length direction of the aerosol generating matrix 10. The cross-sectional shape of the pore 1 refers to the shape of a single pore 1 cut in cross section.

Referring to FIG. 3 and FIG. 4 , the aerosol generating substrate 10 provided in the embodiment of the present application is used for an aerosol generating product. The aerosol generating product comprises the aerosol generating substrate 10 in any embodiment of the present application, the functional The functional segment 20 is disposed at one end of the aerosol generating substrate 10 along the length direction, and the functional segment 20 includes a filter segment 21 for filtering aerosol. The outer wrapping layer 30 wraps around the periphery of the functional segment 20 and the periphery of the aerosol generating substrate 10.

The filter section 21 is used to filter the aerosol generated by the aerosol generating substrate 10 .

The aerosol generating product is used for users to inhale the aerosol generated by the aerosol generating matrix 10. For example, the user can inhale the filtered aerosol by holding the filter segment 21 in the mouth. The aerosol generated by the aerosol generating matrix 10 is transported to the filter segment 21 through the air hole 1 under the action of the suction negative pressure.

The aerosol generating substrate 10 provided in the embodiment of the present application is used to generate aerosol by heating. Since the aerosol generating substrate 10 has the portability requirement of being held by a user, the size of the aerosol generating substrate 10 is limited. By using pores 1 with at least two cross-sectional shapes, the cross-sectional area and cross-sectional shape of each pore 1 can be flexibly designed when the size of the aerosol generating substrate 10 is limited. This not only facilitates the regulation of the flow resistance of the aerosol, that is, the regulation of the inhalation resistance when the user inhales, but also facilitates the regulation of the medium mass distribution at different positions of the aerosol generating substrate 10, thereby improving the heating rate and heating uniformity, reducing the situation of burning caused by insufficient heating or excessive heating, and the aerosol can be released as evenly as possible.

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 10 to generate an aerosol.

There are many heating methods for the heating component. Exemplarily, the heating methods include center heating, circumferential heating and/or bottom heating. The center heating method refers to the heating component being inserted into the interior of the aerosol generating product to bake and heat the aerosol generating product from the inside to the outside. The circumferential heating method refers to the heating component being arranged at the periphery of the aerosol generating product to bake and heat the aerosol generating product from the outside to the inside. The bottom heating method refers to the heating component being located below the aerosol generating product, using the heating component to heat the air first, and then the hot air bakes and heats the aerosol generating product from the bottom to the top.

The heating methods of the heating component include but are not limited to resistance heating, electromagnetic heating, infrared heating, microwave heating or laser heating.

In some embodiments, please refer to FIG. 4 , the function segment 20 may only include the filtering segment 21 .

In some other embodiments, please refer to FIG. 20 , the functional section 20 further includes a cooling section 22, which is located between the filtering section 21 and the aerosol generating substrate 10. The cooling section 22 is used to cool the aerosol in the filtering section 21. Before the aerosol is filtered, the aerosol is cooled. The cooling section 22 can improve the "burning mouth" phenomenon when the user inhales the aerosol.

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 (Polybutylene Adipate Terephthalate) and other materials.

The cooling materials used in the cooling section 22 include but are not limited to one or more combinations of PE (polyethylene), PLA (Polylactic Acid), PBAT (Polybutylene Adipate Terephthalate), PP (Polypropylene), acetate fiber, propylene fiber and the like.

The filter materials used in the filter section 21 include but are not limited to one or more combinations of PE (polyethylene), PLA (Polylactic Acid), PBAT (Polybutylene Adipate Terephthalate), PP (Polypropylene), acetate fiber, acrylic fiber and the like.

The materials of the cooling section 22 and the filtering section 21 may be the same or different.

In some embodiments, the aerosol-generating substrate 10 may be substantially in the form of a columnar structure. That is, the aerosol-generating substrate 10 is substantially in the form of a long strip, rather than a thin sheet. The length of the aerosol-generating substrate 10 is greater than the maximum distance between two points on its cross section.

For example, in a cross section perpendicular to the length direction of the aerosol generating substrate 10, the cross-sectional shape of the aerosol generating substrate 10 includes, but is not limited to, a circle, an ellipse, a racetrack, or a polygon, etc. The cross-sectional shape of the aerosol generating substrate 10 is the above-mentioned regular shape, the product consistency is good, and the product quality is easy to monitor.

Please refer to Figures 5 to 19, the cross-sectional shape of the aerosol generating substrate 10 is circular. In this way, there are basically no sharp corners at the edge of the aerosol generating substrate 10, which can reduce stress concentration and corner collapse. The embodiment of the present application is illustrated by taking the cross-sectional shape of the aerosol generating substrate 10 as a circle as an example, that is, the aerosol generating substrate 10 is a cylinder. The length direction of the aerosol generating substrate 10 is greater than the maximum distance between two points on its cross section, such as the diameter.

The specific components of the aerosol generating substrate 10 are not limited herein. For example, in one embodiment, the aerosol generating substrate 10 comprises: The sol-forming matrix 10 may include plant components, auxiliary components, smoke-generating agent components, adhesive components, and the like.

In one embodiment, the plant component is one or more combinations of powders formed by crushing tobacco raw materials, tobacco leaf fragments, tobacco stems, tobacco dust, aromatic plants, etc. The plant component is used to generate an aerosol containing alkaloids when heated.

In one embodiment, the auxiliary agent component can be one or more combinations of inorganic fillers, lubricants, and emulsifiers. Among them, the inorganic filler includes one or more combinations of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. The inorganic filler can provide a skeleton support for the plant component, and the inorganic filler also has micropores, which can increase the porosity of the wall material after the plant component is formed, thereby increasing the aerosol release rate.

The lubricant includes one or more combinations of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, and palmitic acid. The lubricant can increase the fluidity of the particles, reduce the friction between the particles, make the overall density of the particle distribution more uniform, and also reduce the pressure required for mold molding and reduce the wear of the mold.

The emulsifier includes one or more combinations of polyglycerol fatty acid ester, Tween-80, and polyvinyl alcohol. The emulsifier can slow down the loss of flavor substances during storage to a certain extent, increase the stability of flavor substances, and improve the sensory quality of the product.

The function of the smoke-generating agent component is to generate a large amount of steam when heated, thereby increasing the amount of smoke in the smoking product. 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 monoacetin, diacetin or triacetin); 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 diacetin glycerides, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, glyceryl tributyrate, lauryl acetate) or one or more combinations thereof.

In one embodiment, the adhesive component is a natural plant-extracted, non-ionized modified viscous polysaccharide, including tamarind polysaccharide, pullulan, seaweed polysaccharide, locust bean gum, guar gum, xyloglucan, etc. The binder is used to bond the particles together, making them less likely to loosen. In addition, it improves the water resistance of the aerosol-generating matrix, is harmless to the human body, and has a certain health-care effect.

In one embodiment, the aerosol generating matrix 10 is an integrally molded structure. For example, the aerosol generating matrix 10 can be an integral structure formed by processes such as injection molding, compression molding or extrusion. Among them, extrusion molding refers to a processing method in which a raw material mixture is added to an extruder, and the material is plasticized by heat through the action between the extruder barrel and the screw, and is pushed forward by the screw, and continuously passes through the head to form various cross-section products or semi-finished products. The aerosol matrix formed by extrusion molding is in the shape of strips. In this way, after the aerosol generating matrix 10 is heated and sucked or stops being heated, it is an integral medium, and the problem of disintegration and falling does not occur easily, which solves the problems of the three types of aerosol generating matrices in the prior art, such as flake loosening, filamentous components, granular components falling off, and difficult cleaning.

In one embodiment, referring to FIG. 1 , FIG. 2 , and FIG. 5 to FIG. 8 , the pores 1 penetrate the opposite ends of the aerosol generating substrate 10 along the length direction; the aerosol generating substrate 10 is divided into a middle portion 11 and an edge portion 12, the edge portion 12 surrounds the middle portion 11, the middle portion 11 is arranged with a first set 101 composed of a plurality of pores 1, and the edge portion 12 is arranged with a second set 102 composed of a plurality of pores 1, the cross-sectional shape of each pore 1 of the first set 101 is the same, and the cross-sectional shape of at least one pore 1 of the second set 102 is different from the cross-sectional shape of the pore 1 of the first set 101. That is, the pores 1 in the second set 102 surround the pores 1 of the first set 101. The concentrated distribution of pores with different cross-sectional shapes is not only convenient for manufacturing, but also convenient for controlling the medium mass distribution of the aerosol generating matrix 10 by reasonably arranging different cross-sectional shapes. Under the condition that the size of the aerosol generating matrix 10 is certain, the total cross-sectional area of the pores 1 is increased as much as possible and the thickness of the partition walls is made as consistent as possible, so as to achieve good heat transfer consistency during the heating process and achieve consistency in aerosol release of the medium during the heating and puffing process, thereby taking into account both the structural stability of the aerosol generating matrix 10 and the uniformity of aerosol release, thereby improving the puffing experience.

Exemplarily, in one embodiment, referring to Figures 2 and 6, the cross-sectional shape of each pore 1 of the second set 102 is different from the cross-sectional shape of the pore 1 of the first set 101. In other words, the cross-sectional shape of each pore 1 of the second set 102 is different from the cross-sectional shape of the pore 1 of the first set 101.

Exemplarily, in one embodiment, referring to Figures 5 and 8, the cross-sectional shape of some pores 1 of the second set 102 is different from the cross-sectional shape of the pores 1 of the first set 101, and the cross-sectional shape of the remaining pores 1 of the second set 102 is the same as the cross-sectional shape of the pores 1 of the first set 101.

Exemplarily, in one embodiment, referring to FIG. 2 , the cross-sectional shapes of the various pores 1 of the first set 101 are all of the first shape 100, and the cross-sectional shapes of the various pores 1 of the second set 102 are the same and are all of the second shape 200. That is, all of the pores 1 of the first shape 100 are distributed in the middle portion 11, and all of the pores 1 of the second shape 200 are distributed in the edge portion 12. Each of the pores 1 of the second shape 200 surrounds all of the pores 1 of the first shape 100.

In a specific embodiment, referring to FIG. 2 , the cross-sectional shape of the pores 1 of the first set 101 is circular, and the cross-sectional shape of each pore 1 of the second set 102 is a portion of the cross-sectional shape of the pores 1 of the first set 101. The cross-sectional shape of each pore of the second set 102 is a portion of a circle, for example, the cross-sectional shape of each pore of the second set 102 is an arcuate shape. The circular pores 1 can improve the lateral support strength of the aerosol generating substrate 10 and improve the reprocessing performance of the aerosol generating substrate 10.

In a specific embodiment, referring to FIG5 , the cross-sectional shape of the pores 1 of the first set 101 is a regular hexagon, and the cross-sectional shape of each pore 1 of the second set 102 is a portion of the cross-sectional shape of the pores 1 of the first set 101. The cross-sectional shape of each pore of the second set 102 is a portion of a regular hexagon, for example, the cross-sectional shape of each pore of the second set 102 is a trapezoid. A regular hexagon is the best topological structure for covering a two-dimensional plane, and the regular hexagonal pores 1 can divide the cross section of the middle portion more evenly.

In a specific embodiment, referring to FIG6 , the cross-sectional shape of the pores 1 of the first set 101 is a rhombus, and the cross-sectional shape of each pore 1 of the second set 102 is a portion of the cross-sectional shape of the pores 1 of the first set 101. The cross-sectional shape of each pore of the second set 102 is a portion of the rhombus, for example, the cross-sectional shape of each pore of the second set 102 is a triangle. The rhombus-shaped pores 1 can improve the lateral cutting performance of the aerosol generating substrate 10 and reduce the deformation phenomenon caused by cutting during the processing of the aerosol generating substrate 10.

In a specific embodiment, referring to FIG. 7 , the cross-sectional shape of the pores 1 of the first set 101 is a regular quadrilateral, and the cross-sectional shape of each pore 1 of the second set 102 is the cross-sectional shape of the pores 1 of the first set 101. A portion of the cross-sectional shape. The cross-sectional shape of each pore of the second set 102 is a portion of a regular quadrilateral, for example, the cross-sectional shape of each pore of the second set 102 is a triangle. A regular quadrilateral has a characteristic of constant side length, which can improve the utilization rate of the cross section of the aerosol generating substrate 10 and improve the heating uniformity of the aerosol generating substrate 10.

Exemplarily, in one embodiment, referring to Figures 6 to 8, the cross-sectional shape of the pores 1 of the first set 101 is a first shape 100, and the second set 102 has two or more cross-sectional shapes. Exemplarily, the cross-sectional shapes in the second set 102 may include a second shape 200 and a third shape 300.

Exemplarily, in one embodiment, the cross-sectional shapes of the pores 1 in the second set 102 are all different. That is, the second set 102 has a number of cross-sectional shapes equal to the number of pores 1. For example, if the number of pores 1 in the second set 102 is 5, then the pores 1 in the second set 102 have five cross-sectional shapes. For another example, if the number of pores 1 in the second set 102 is 6, then the pores 1 in the second set 102 have six cross-sectional shapes.

It should be noted that, in the embodiments of the present application, a plurality includes two and more than two.

In one embodiment, referring to FIG. 1 , FIG. 2 , and FIG. 5 to FIG. 8 , the cross-sectional shape of each pore 1 of the first set 101 is partially the same as the cross-sectional shape of each pore 1 of the second set 102. Exemplarily, a portion of the pores 1 of the first set 101 is cut by the edge portion 12 to form the pores 1 of the second set 102. Taking the aerosol generating matrix 10 manufactured into an integrally formed structure by an extrusion process as an example, in the process of extruding the atomized medium from the mold, the edge mold cooperates with the circumferential mold surrounding the mold cavity to form the pores 1 of the second set 102, that is, the circumferential mold surrounding the circumferential wall of the mold cavity squeezes the outer periphery of the atomized medium, and the outer periphery cuts the pores 1 of the first set 101 near the outer periphery to form the pores 1 of the second set 102.

In a specific embodiment, please refer to FIG. 6 , the cross-sectional shape of each pore 1 of the first set 101 is a rhombus, and the pores 1 of the first set 101 are evenly distributed. The cross-sectional shape of each pore 1 of the first set 101 is partially the same as the cross-sectional shape of each pore 1 of the second set 102 (some pores 1 of the second set 102 are similar to a fan shape). The advantage of such a distribution is that the porosity is increased, the thickness of the partition wall is consistent, the heat transfer efficiency is consistent, and the medium is uniformly released. The angle of a single rhombus-shaped pore 1 is not uniform, When the aerosol flows through the rhombus-shaped air holes 1, more turbulence is formed at places with smaller angles, and the flow rate is different. The aerosol flow rate of the irregular air holes 1 of the second set 102 is also different from that of the rhombus-shaped air holes 1. Aerosols with different rates but similar components are gradually obtained, which can improve the inhalation experience and enhance sensory consistency.

In a specific embodiment, please refer to FIG. 5 , the cross-sectional shape of each pore 1 of the first set 101 is a regular hexagon, and each pore 1 of the first set 101 is evenly distributed, and the cross-sectional shape of each pore 1 of the first set 101 is partially the same as the cross-sectional shape of each pore 1 of the second set 102 (the pore 1 of the second set 102 is similar to a trapezoid, and the bottom side is a circular arc). The advantage of such a distribution is that the porosity is increased, the medium wall thickness is uniform and stable, the heat transfer is stable, and the release is stable. Each pore 1 of the second set 102 can form aerosols of different rates; the regular hexagonal setting can improve the lateral strength and improve the yield rate during the processing process. In addition, the setting can increase the aerosol release area inside the aerosol generating matrix 10, and has good uniformity of medium mass distribution. It has a good aerosol release rate and aerosol release stability during the heating and suction process, which improves the consumer's experience.

In one embodiment, referring to FIG. 1 , FIG. 2 , and FIG. 5 to FIG. 16 , the cross-sectional shape of at least one pore 1 is a first shape 100 , and the cross-sectional shape of at least one pore 1 is a second shape 200 .

In one embodiment, referring to FIG. 1 , FIG. 2 , and FIG. 5 to FIG. 8 , a part of the first shape 100 is the same as the second shape 200, and all the pores 1 of the second shape 200 are distributed at the edge portion 12. Exemplarily, the cross-sectional area of the pores 1 of the second shape 200 is smaller than the cross-sectional area of the pores 1 of the first shape 100, and the pores 1 of the second shape 200 are distributed at the edge portion 12, so that the pores 1 of the first shape 100 and the pores 1 of the second shape 200 can cover the entire aerosol generating matrix 10 as much as possible, which can effectively increase the airflow flow channel and avoid the cross-sectional area of the pores 1 being too large to cause the wall thickness to be too thin.

In one embodiment, a portion of the first shape 100 is cut by the edge portion 12 to form a second shape 200. Taking the aerosol generating substrate 10 manufactured into an integrally formed structure by an extrusion process as an example, during the process of extruding the atomized medium from the mold, the edge mold cooperates with the circumferential mold surrounding the mold cavity to form the pores 1 of the second shape 200, that is, the circumferential wall of the circumferential mold surrounding the mold cavity squeezes the outer periphery of the atomized medium, and the outer periphery cuts the pores 1 of the first shape 100 near the outer periphery to form the pores 1 of the second shape 200.

In one embodiment, please refer to Figures 1, 2, and 5 to 8, each pore 1 in the first set 101 is formed in the middle part 11 in a uniformly distributed form. Exemplarily, each pore 1 of the first shape 100 is uniformly distributed in the middle part 11. With this design, the mass distribution at different positions of the middle part 11 is close to the same, and the cross-sectional area of the pores 1 at different positions of the middle part 11 is close to the same, so that the release amount and flow resistance of the aerosol at different positions of the middle part 11 are close to the same, so that the uniformity of aerosol release during the puffing process can be improved, and the puffing amount of each puff during the puffing process is close to the same, thereby improving the puffing consistency and providing a good puffing experience.

It should be understood that the evenly distributed form means that each pore 1 itself is evenly distributed.

There is no limitation on the method for realizing the uniform distribution of the pores 1 of each first shape 100. By way of example, in some embodiments, please refer to Figures 1, 2 and 5 to 8. The uniform distribution of the pores 1 of each first shape 100 includes: the cross-sectional areas of each first shape 100 are equal, and the thicknesses of the partition walls of two adjacent first shapes 100 are equal.

The cross-sectional areas of the pores 1 of the first shape 100 may be equal in that the cross-sectional shapes of the pores 1 of the first shape 100 are the same and the hydraulic diameters of the cross-sectional areas are equal. For example, the cross-sectional shapes of the pores 1 of the first shape 100 are circular and the cross-sectional diameters are equal.

It should be noted that the hydraulic diameter refers to the ratio of four times the cross-sectional area of the flow passage to the perimeter. The flow passage refers to the cross section taken by the streamline cluster perpendicular to the fluid, that is, the cross section of the pore 1. For example, if the cross-sectional shape of the pore 1 is a regular quadrilateral, the hydraulic diameter is the ratio of four times the cross-sectional area of the regular quadrilateral pore 1 to the perimeter of the regular quadrilateral deformation. For another example, if the cross-sectional shape of the pore 1 is a circle, the hydraulic diameter is the diameter of the circular pore 1.

In one embodiment, referring to FIG. 5 and FIG. 6 , all pores 1 of the first shape 100 are divided into a plurality of pore units 1011, and a plurality of pores 1 of the pore unit 1011 are arranged along a first direction, and a plurality of pore units 1011 are arranged along a second direction, wherein the first direction and the second direction intersect. In this way, all pores 1 are arranged in two dimensions, which can take into account both the structural strength and the aerosol release amount of the aerosol generating matrix 10, and facilitate the effective use of the aerosol generating matrix 10.

In one embodiment, referring to FIG. 2 , FIG. 5 , FIG. 6 and FIG. 8 , a plurality of pores 1 of the pore unit 1011 are arranged in a straight line along a first direction, and a plurality of pore units 1011 are arranged in a straight line along a second direction. The distribution of the pores 1 of the first shape 100 is a matrix distribution or a grid distribution. In this way, all the pores 1 of the first shape 100 are arranged in an orderly manner, which is convenient for design and manufacturing, and has good product consistency.

It can be understood that orderly arrangement refers to arrangement according to set rules.

In one embodiment, the multiple pores 1 of the pore unit 1011 are arranged in a circle along the first direction, and the multiple pore units 1011 are set one by one along the second direction. That is to say, all the pores 1 of the first shape 100 are distributed in a plurality of sets of annular rings. For example, each ring can be a circular ring, and the centers of the multiple circular rings coincide or do not coincide. If the centers of the multiple circular rings coincide, the multiple sets of annular distributions are distributed as multiple concentric circles. In this way, all the pores 1 of the first shape 100 are arranged in an orderly manner, which is convenient for design and manufacturing, and the product consistency is good. For example, the mass distribution of the aerosol generating matrix 10, the heating rate at different positions of the middle part 11, and/or the flow resistance of the aerosol can be adjusted by adjusting the spacing between different circular rings and/or the number of pores 1 in the same circular ring, thereby improving the user's suction experience.

In one embodiment, referring to FIG. 1 , FIG. 2 , and FIG. 5 to FIG. 16 , the cross-sectional shape of at least one pore 1 is a first shape 100, and the cross-sectional shape of at least one pore 1 is a second shape 200. The first shape 100 is different from the second shape 200. Exemplarily, the cross-sectional shape of one pore 1 may be the first shape 100, or the cross-sectional shape of two or more pores 1 may be the first shape 100. Exemplarily, the cross-sectional shape of one pore 1 may be the second shape 200, or the cross-sectional shape of two or more pores 1 may be the second shape 200.

In one embodiment, referring to FIG. 1 , FIG. 2 , and FIG. 5 to FIG. 8 , a portion of the first shape 100 is the same as the second shape 200. That is, the second shape 200 is a portion of the first shape 100, and the second shape 200 may overlap with a portion of the first shape 100. For example, the first shape 100 may be a circle, and the second shape 200 may be a semicircle or an arc. For another example, the first shape 100 may be a regular quadrilateral, and the second shape 200 may be a sector or a triangle.

For example, in one embodiment, referring to FIG. 1 , FIG. 2 and FIG. 5 to FIG. 16 , the first shape 100 may be circular, elliptical, sector-shaped or polygonal. The polygonal shape includes but is not limited to a triangle, a quadrilateral, a pentagon or a hexagon, etc. The quadrilateral may be a square or a rhombus, etc. The cross-sectional shape of the pore 1 is a regular shape, the product consistency is good, and the product quality is easy to monitor.

In one embodiment, referring to FIG. 1 , FIG. 2 and FIG. 5 to FIG. 16 , the second shape 200 may be The shape of the pore 1 is circular, oval, fan-shaped, arcuate, polygonal or special-shaped. The polygon includes but is not limited to a triangle, a quadrilateral, a pentagon or a hexagon, etc. The quadrilateral can be a square or a rhombus, etc. The cross-sectional shape of the pore 1 is a regular shape, the product consistency is good, and it is easy to monitor the product quality. The cross-sectional shape of the pore 1 can also be an irregular shape such as a special shape.

In one embodiment, referring to FIGS. 9 to 12 , there are multiple pores 1 of the first shape 100 and pores 1 of the second shape 200, and each pore 1 of the second shape 200 is surrounded by at least two pores 1 of the first shape 100. In this design, the pores 1 of the second shape 200 are placed in the area surrounded by at least two pores 1 of the first shape 100, so that the medium quality of the area surrounded by at least two pores 1 of the first shape 100 can be adjusted by the pores 1 of the second shape 200, thereby adjusting the suction resistance, the release amount of aerosol and the heating rate, etc.

Exemplarily, in one embodiment, the cross-sectional area of the pores 1 of the second shape 200 is smaller than the cross-sectional area of the pores 1 of the first shape 100, and each pore 1 of the second shape 200 is surrounded by at least two pores 1 of the first shape 100. In this way, under the condition of keeping the cross-sectional area of the aerosol generating substrate 10 unchanged, compared with using all pores 1 of the first shape 100, the pores 1 of the second shape 200 are placed in the area surrounded by at least two pores 1 of the first shape 100, and the thickness of the partition wall between two adjacent pores 1 is relatively thick, the amount of aerosol released can be relatively large, and the collapse of the pores 1 can be avoided to a certain extent.

In a specific embodiment, please refer to FIG. 9 and FIG. 10 , the second shape 200 is a rhombus, an equilateral triangle, a regular hexagon or other regular polygons, the first shape 100 is a circle, and each pore 1 of the second shape 200 is surrounded by at least two pores 1 of the first shape 100. The advantage of such a distribution is that the rhombus-shaped pores 1 can fill the space between the circular pores 1, increase the overall porosity, reduce the thickness of the partition wall between the circular pores 1, and make the wall thickness relatively uniform, which can improve the heat transfer efficiency and the aerosol release rate, so as to reduce the heating waiting time during the user's puffing process and improve the user's experience.

In a specific embodiment, please refer to FIG. 12 , the second shape 200 is a rhombus, the first shape 100 is a regular pentagon, and each pore 1 of the second shape 200 is surrounded by at least two pores 1 of the first shape 100. The advantage of such a distribution is that the rhombus-shaped pores 1 can fill the space between the regular pentagonal pores 1, increase the overall porosity, reduce the wall thickness of the area surrounded by the four regular pentagonal pores, and make the wall The thickness is relatively uniform, which can improve heat transfer efficiency, medium release rate and suction consistency.

In one embodiment, referring to FIGS. 13 to 15 , the pores 1 of the first shape 100 and the pores 1 of the second shape 200 are both multiple. All the pores 1 of the first shape 100 are divided into multiple first row groups, multiple pores 1 in each first row group are arranged in a straight line along the first direction, and multiple first row groups are arranged in a straight line along the second direction. All the pores 1 of the second shape 200 are divided into multiple second row groups, multiple pores 1 in each second row group are arranged in a straight line along the first direction, and multiple second row groups are arranged in a straight line along the second direction. In other words, all the pores 1 of the second shape 200 are distributed in a two-dimensional matrix. The pores 1 of the first shape 100 and the pores 1 of the second shape 200 are arranged alternately in sequence in the first direction, and the pores 1 of the first shape 100 and the pores 1 of the second shape 200 are arranged alternately in sequence in the second direction.

Alternately arranged in sequence in the first direction means that, in the first direction, between any two adjacent pores 1 of the first shape 100, there is an pore 1 of the second shape 200. Alternately arranged in sequence in the second direction means that, in the second direction, between any two adjacent pores 1 of the first shape 100, there is an pore 1 of the second shape 200.

With such a design, the mass distribution at different positions of the aerosol generating matrix 10 is close to the same, and the cross-sectional areas of the pores 1 at different positions of the aerosol generating matrix 10 are close to the same, so that the aerosol release amount and flow resistance at different positions of the aerosol generating matrix 10 are close to the same. In this way, the uniformity of aerosol release during the puffing process can be improved, and the puffing amount per puff during the puffing process is close to the same, thereby improving the puffing consistency and providing a good puffing experience.

In a specific embodiment, referring to FIG. 13 to FIG. 15 , the second shape 200 is a rhombus, an equilateral triangle, a regular hexagon or other regular polygons, the first shape 100 is a circle, the pores 1 of the first shape 100 and the pores 1 of the second shape 200 are arranged alternately in the first direction, and the pores 1 of the first shape 100 and the pores 1 of the second shape 200 are arranged alternately in the second direction. The advantage of such distribution is that the area of a regular polygon with the same perimeter is smaller than the area of a circle, and under the condition that the cross-sectional area of the aerosol generating substrate 10 is constant, the circle and the regular polygons such as regular triangles and regular hexagons are arranged alternately, which can increase the medium mass per unit volume, increase the stability of the pores 1, and increase the number of suction ports.

In one embodiment, referring to FIG. 16 , an air hole 1 having a cross-sectional shape of a third shape 300 is provided on the center line of the aerosol generating substrate 10. The air holes 1 of the third shape 300 are arranged. According to the law of fluid mechanics, the central flow velocity is greater than the peripheral flow velocity during negative pressure suction. Therefore, the air holes 1 of the third shape 300 are arranged on the center line of the aerosol generating matrix 10 to further enhance the uniform release of aerosol from the center to the surroundings or stabilize the uniform release of aerosol of the entire aerosol generating matrix 10.

It should be noted that the center line of the aerosol generating substrate 10 is a line connecting the geometric centers of the two end surfaces of the aerosol generating substrate 10 along the length direction. Taking the aerosol generating substrate 10 as a cylinder as an example, the center line of the aerosol generating substrate 10 is a line connecting the centers of the two circular end surfaces of the aerosol generating substrate 10 along the length direction.

In one embodiment, referring to FIG. 16 , there are four pores 1 of the first shape 100 and four pores 1 of the second shape 200, and the four pores 1 of the first shape 100 are symmetrically arranged on two mutually perpendicular straight lines passing through the pores 1 of the third shape 300, and one pore 1 of the second shape 200 is arranged between two adjacent pores 1 of the first shape 100. In this way, the nine pores 1 are roughly distributed in a tic-tac-toe shape, and by reasonably combining pores 1 of different cross-sectional areas, the medium mass distribution is moderate, which is conducive to uniform release of aerosol.

In a specific embodiment, please refer to Figure 16, the first shape 100 is a fan shape, the second shape 200 is a rectangle, and the third shape 300 is a regular quadrilateral. There are four pores 1 of the first shape 100 and four pores 1 of the second shape 200. The four pores 1 of the first shape 100 are symmetrically arranged on two straight lines perpendicular to each other along the pores 1 of the third shape 300, and a pore 1 of the second shape 200 is arranged between two adjacent pores 1 of the first shape 100.

In one embodiment, the cross-sectional area of the pore 1 is between 0.0019 mm ² (square millimeter) and 30 mm ^2. Exemplarily, the cross-sectional area of the pore 1 is 0.002 mm ² , 0.1 mm ² , 0.2 mm ² , 0.4 mm ² , 0.5 mm ² , 0.8 mm 2, 1 mm ² , 1.3 mm ² , 1.6 mm ² , 1.8 mm ² , 2 mm ² , 2.1 mm ² , 2.2 mm ² , 2.4 mm ^{2, 2.6 mm 2, 2.8 mm 2, 3 mm 2 , 4 mm 2} , 5 mm ² or 6 mm ² , etc.

When the cross-sectional area of the pores 1 is greater than 30 ^mm2 , the number of pores 1 is small, the aerosol generating matrix 10 is prone to burn, and the aerosol generating matrix 10 is prone to uneven aerosol release during the heating process (for example, the first two puffs release a large amount of aerosol, and the last few puffs release a small amount of aerosol), which affects the user's smoking experience.

When the cross-sectional area of the pores 1 is less than 0.0019 mm ² , the difficulty of the molding process will be significantly increased, the size of the pores 1 will be difficult to control, and the defective rate of the aerosol generating matrix 10 will be increased.

When the cross-sectional area of the pores 1 is in the range of 0.0019 mm ² to 30 mm ² , the flow resistance of the aerosol generating matrix 10 is relatively small (i.e., the suction resistance is relatively small), and the flow rate of the aerosol is appropriate. The aerosol inside the aerosol generating matrix 10 is easy to extract, the aerosol release is more uniform and the utilization rate is higher. The aerosol generating matrix 10 is not prone to burning, the user experience is relatively high, and it is also easy to process and manufacture.

Preferably, the cross-sectional area of the pores 1 is 0.007 ^{mm2-7.1 mm2} (square millimeters), for example, 0.1 ^mm2 , 0.2 ^mm2 , 0.4 ^mm2 , 0.5 ^mm2 , 0.8 ^mm2 , 1 ^mm2 , 1.3 ^mm2 , 1.6 ^mm2 , 1.8 ^mm2 , ² mm2, ^2.1 mm2, 2.2 ^mm2 , 2.4 ^mm2 , 2.6 ^mm2 , 2.8 ^mm2 , 3 ^mm2 , etc.

Exemplarily, the hydraulic diameter of the pore 1 is 0.05 mm to 6 mm (millimeter), for example, 0.05 mm, 0.1 mm, 0.2 mm, 0.4 mm, 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.6 mm, 1.8 mm, 2 mm, 2.1 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, 4 mm, 5 mm, 6 mm, etc.

When the hydraulic diameter of the pores 1 is greater than 6 mm, the number of the pores 1 is small, the smoke-generating medium segment 10 is prone to burn, and the smoke-generating medium segment 10 is prone to uneven aerosol release during heating (for example, a large amount of aerosol is released in the first two puffs, and a small amount of aerosol is released in the last few puffs), which affects the user's smoking experience.

When the hydraulic diameter of the pores 1 is less than 0.05 mm, the difficulty of the molding process will be significantly increased, the size of the pores 1 will be difficult to control, and the defective rate of the smoke-generating medium segment 10 will be increased.

When the hydraulic diameter of the pores 1 is within the range of 0.05 mm to 6 mm, the flow resistance of the smoke-generating medium segment 10 is relatively small (i.e., the suction resistance is relatively small), and the flow rate of the aerosol is appropriate. The aerosol inside the smoke-generating medium segment 10 is easy to extract, the aerosol is released more evenly and the utilization rate is higher. The smoke-generating medium segment 10 is not prone to burning, the user experience is relatively high, and it is also easy to process and manufacture.

In some embodiments, the hydraulic diameter of the pores 1 is 0.1 mm to 3 mm (millimeter), for example, 0.1 mm, 0.2 mm, 0.4 mm, 0.5 mm, 0.8 mm, 1 mm, 1.3 mm, 1.6 mm, 1.8 mm, 2 mm, 2.1 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, etc.

For example, in one embodiment, the third shape 300 can be a circle, an ellipse, a sector or a polygon. The polygon includes but is not limited to a triangle, a quadrilateral, a pentagon or a hexagon, etc. The shape can be square or diamond, etc. The cross-sectional shape of the pore 1 is a regular shape, the product consistency is good, and it is convenient to monitor the product quality.

In one embodiment, the aerosol generating matrix 10 has a plurality of micropores, and the plurality of micropores are interconnected and connected to the pore 1. Specifically, the plurality of micropores are interconnected and connected to the surface of the material. In other words, the plurality of micropores can be connected to the pore 1. The micropores have a capillary effect, and the micropores can guide the aerosol into the pore 1 through the capillary effect. The aerosol generated by the aerosol generating matrix 10 can overflow into the pore 1 through the micropores, and the aerosol is collected through the pore 1. In this way, the utilization rate of the effective components of the aerosol generating matrix 10 can be improved.

It should be understood that the plurality of micropores are arranged in a disordered manner. In other words, the micropores are randomly generated. The plurality of micropores are arranged in a disordered manner. The disordered arrangement means that there are no set rules, for example, the position of the micropores formed cannot be precisely controlled by humans during the micropore formation process.

In one embodiment, please refer to Figure 11, the aerosol generating matrix 10 includes a groove 2 arranged on the circumferential surface of the aerosol generating matrix 10, and the groove 2 runs through at least one end of the aerosol generating matrix 10 along the length direction. Specifically, the groove 2 has a gap opening outward. On the one hand, the groove 2 can increase the external surface area of the aerosol generating matrix 10, increase the heat conduction efficiency, and be more conducive to the extraction of effective ingredients. Exemplarily, if the heating method is circumferential heating, the overall heating rate of the aerosol generating matrix 10 can also be adjusted in this way to enhance the consumer's experience of use. On the other hand, exemplarily, since the outer periphery of the aerosol generating matrix 10 is wrapped with an outer wrapping layer 30, the outer wrapping layer 30 can close the gap of the groove 2. The outer wrapping layer 30 cooperates with the groove 2 to form through holes that are open only at both ends along the length direction of the aerosol generating matrix 10. That is to say, the outer wrapping layer 30 and the groove 2 cooperate to form a channel similar to the pore 1, which can also play a role in collecting aerosols, thereby playing a guiding role in limiting the flow of aerosols and external air along the length direction, which can increase the amount of air entering and improve the aerosol extraction efficiency.

In some embodiments, referring to FIG. 4 , the pores 1 may be straight pores, that is, a single pore 1 extends in a straight line along the length direction, so that the pores 1 are easy to form and have low manufacturing difficulty.

In some embodiments, the cross-sectional areas of the pores 1 at any position along the length direction are equal. For example, taking the cross-sectional shape of the pores 1 as a circle, the diameters of the pores 1 at any position along the length direction are equal, that is, the pores 1 are equal diameter holes.

In some embodiments, see FIG. 11 , a single groove 2 may extend in a straight line along the length direction. Therefore, the groove 2 is easy to form and has low manufacturing difficulty.

In some embodiments, referring to FIG. 11 , the cross-sectional areas of the grooves 2 at any positions along the length of the aerosol generating substrate 10 are equal.

It should be noted that, in the embodiments of the present application, unless otherwise specified, the length direction refers to the length direction of the aerosol generating substrate 10 .

In the embodiment of the present application, the air channel includes air holes 1 and/or grooves 2.

In some embodiments, see Figure 17, all air passages penetrate the same end of the aerosol generating substrate 10 along the length direction, and the other end is a closed end. That is, all pores 1 and/or grooves 2 open toward the same end.

In other embodiments, see Fig. 18, a portion of the air passages penetrate one end of the aerosol generating substrate 10 along the length direction, and another portion of the air passages penetrate the other end of the aerosol generating substrate 10 along the length direction. For example, a portion of the pores 1 penetrate one end of the aerosol generating substrate 10 along the length direction, and another portion of the pores 1 penetrate the other end of the aerosol generating substrate 10 along the length direction.

In some other embodiments, please refer to Figure 19, each airway runs through both ends of the aerosol generating substrate 10 along the length direction, and the airflow can flow from one end of the aerosol generating substrate 10 along the length direction through the airway to the other end of the aerosol generating substrate 10 along the length direction.

It should be noted that air channels such as pores 1 and grooves 2 are holes or grooves in a macroscopic sense, and micropores are holes or grooves in a microscopic sense. The cross-sectional areas of pores 1 and grooves 2 are much larger than those of micropores.

Exemplarily, the cross-sectional area of the airway is at least 20 times the cross-sectional area of the micropores. When the size of the micropores remains roughly the same, when it is less than 20 times, the size of the airway will be too small, and the aerosol will not be easily released from the inner wall of the airway into the airway, and it will cause the user's suction resistance to be large, and the user's suction experience will be reduced. Therefore, in this embodiment, when the cross-sectional area of the airway is greater than or equal to 20 times the cross-sectional area of the micropores, the rate of aerosol release from the inner wall of the airway can be guaranteed, and the suction resistance can also be reduced, thereby improving the user's suction experience.

In some embodiments, the cross-sectional area of the airway is 20 to 60,000 times the cross-sectional area of the micropore. If the cross-sectional area of the airway exceeds 60,000 times the cross-sectional area of the micropore, the area of the airway will be too large. The overall quality of the smoke-generating medium decreases, the medium utilization rate is low, and the heating rate is large, and the aerosol is easily released into the environment from the micropores.

Exemplarily, the cross-sectional area of the airway is 100 to 40,000 times the cross-sectional area of the micropore.

Illustratively, the cross-sectional area of the micropores is 0.7 ^nm2 (square nanometers) to 710 ^μm2 (square micrometers), for example, 1 ^nm2 , ¹⁰ nm2, ²⁵ nm2, 30 ^nm2 , ^{40 nm2 , 50 nm2} , ^{60 nm2 , 70 nm2} , 80 nm2, 100 nm2, 200 nm2, 300 ^nm2, 400 nm2, 500 nm2, 600 nm2, 700 nm2 ^, 800 ^nm2 , 900 nm2, ¹ μm2, ^{2 μm2} , ³ μm2, etc.

When the cross-sectional area of the micropores is less than 0.7 nm ² , the effective components in the medium are not easy to volatilize into the pores 111, which will lead to a decrease in the medium utilization rate; and when the cross-sectional area of the micropores in the medium body is greater than 710 μm ² , it will lead to uneven heat conduction in the micropores, resulting in a decrease in the suction experience. Therefore, in this embodiment, controlling the cross-sectional area of the micropores to 0.7 nm ² to 710 μm ² can take into account both the medium utilization rate and the suction experience.

More preferably, the cross-sectional area of the micropores is 1963 nm ² to 20 μm ² .

Exemplarily, the hydraulic diameter of the micropore is 10 nm (nanometer) to 30 μm (micrometer), for example, 10 nm, 20 nm, 24 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 700 nm, 800 nm, 900 nm, 1 μm, 2 μm, 3 μm, etc.

When the hydraulic diameter of the micropores is less than 10nm, the effective components in the medium are not easy to volatilize into the pores 111, which will lead to a decrease in the medium utilization rate; and when the micropore diameter range is greater than 30μm, it will lead to uneven heat conduction in the micropores, resulting in a decrease in the suction experience. Therefore, in this embodiment, controlling the hydraulic diameter of the micropores to 0.1nm to 30μm can take into account both the medium utilization rate and the suction experience.

In the description of the present 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 the present 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 an appropriate manner in any one or more embodiments or examples. In addition, in the absence of mutual contradiction, the present invention is hereby incorporated by reference in its entirety. A person skilled in the art can combine different embodiments or examples described in this application and features of different embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims (21)

An aerosol generating substrate has pores with at least two cross-sectional shapes. The pores are arranged inside the aerosol generating substrate and penetrate at least one end of the aerosol generating substrate along the length direction. According to the aerosol generating substrate according to claim 1, the pores penetrate the opposite ends of the aerosol generating substrate along the length direction; the aerosol generating substrate is divided into a middle portion and an edge portion, the edge portion surrounds the middle portion, the middle portion is arranged with a first set consisting of a plurality of the pores, and the edge portion is arranged with a second set consisting of a plurality of the pores, the cross-sectional shape of each pore of the first set is the same, and the cross-sectional shape of at least one pore of the second set is different from the cross-sectional shape of the pores of the first set. According to the aerosol generating substrate of claim 2, the cross-sectional shape of the pores of the first set is circular, and the cross-sectional shape of each pore of the second set is a portion of the cross-sectional shape of the pores of the first set. According to the aerosol generating substrate of claim 2, the cross-sectional shape of the pores of the first set is a regular hexagon, and the cross-sectional shape of each pore of the second set is a portion of the cross-sectional shape of the pores of the first set. According to the aerosol generating substrate of claim 2, the cross-sectional shape of the pores of the first set is a rhombus, and the cross-sectional shape of each pore of the second set is a portion of the cross-sectional shape of the pores of the first set. According to the aerosol generating substrate of claim 2, the cross-sectional shape of the pores of the first set is a regular quadrilateral, and the cross-sectional shape of each pore of the second set is a portion of the cross-sectional shape of the pores of the first set. According to the aerosol generating substrate of claim 2, all the pores of the first set are divided into a plurality of pore units, the plurality of pores of the pore units are arranged along a first direction, and the plurality of pores of the pore units are arranged along a first direction. The pore units are arranged along a second direction, wherein the first direction intersects with the second direction. According to the aerosol generating substrate of claim 7, the plurality of pores of the pore unit are arranged in a straight line along a first direction, and the plurality of pore units are arranged in a straight line along a second direction. According to the aerosol generating substrate of claim 7, the plurality of pores of the pore unit are arranged circumferentially along the first direction, and the plurality of pore units are nested one by one along the second direction. According to the aerosol generating substrate of claim 1, the cross-sectional shape of at least one of the pores is the first shape, and the cross-sectional shape of at least one of the pores is the second shape. The aerosol-generating substrate of claim 10, wherein a portion of the first shape is the same as the second shape. According to the aerosol generating substrate of claim 10, there are a plurality of pores of the first shape and a plurality of pores of the second shape, and each pore of the second shape is surrounded by at least two pores of the first shape. The aerosol generating substrate according to claim 10, wherein the pores of the first shape and the pores of the second shape are both multiple; All the air holes of the first shape are divided into a plurality of first row groups, a plurality of air holes in each of the first row groups are arranged in a straight line along a first direction, and a plurality of the first row groups are arranged in a straight line along a second direction; all the air holes of the second shape are divided into a plurality of second row groups, a plurality of air holes in each of the second row groups are arranged in a straight line along the first direction, and a plurality of the second row groups are arranged in a straight line along the second direction; The pores of the first shape and the pores of the second shape are arranged alternately in sequence in the first direction, and the pores of the first shape and the pores of the second shape are arranged alternately in sequence in the second direction. According to the aerosol generating substrate of claim 10, an air hole having a cross-sectional shape of the third shape is arranged on the center line of the aerosol generating substrate. The aerosol-generating substrate of claim 14, wherein the pores of the first shape There are four pores of the first shape and the second shape, and the four pores of the first shape are symmetrically arranged on two mutually perpendicular straight lines passing through the pores of the third shape, and one pore of the second shape is arranged between two adjacent pores of the first shape. The aerosol generating substrate according to claim 1, wherein the hydraulic diameter of the pores is between 0.05 mm and 6 mm; and/or The cross-sectional area of the pores is between 0.0019 mm ² and 30 mm ² . The aerosol-generating substrate according to any one of claims 1 to 16, wherein the cross-sectional shape of the aerosol-generating substrate is circular. The aerosol generating substrate according to any one of claims 1 to 16, wherein the aerosol generating substrate has a plurality of micropores, and the plurality of micropores are interconnected and connected to the pores. According to any one of claims 1 to 16, the aerosol generating substrate comprises a groove arranged on the circumferential surface of the aerosol generating substrate, and the groove passes through at least one end of the aerosol generating substrate along the length direction. An aerosol generating article comprising: The aerosol generating substrate according to any one of claims 1 to 19; A functional section, arranged at one end of the aerosol generating substrate along the length direction, the functional section comprising a filtering section for filtering aerosol; The outer wrapping layer wraps around the periphery of the functional segment and the periphery of the aerosol generating substrate. According to the aerosol generating article according to claim 20, the functional section also includes a cooling section, and the cooling section is located between the filtering section and the aerosol generating substrate.