AEROSOL GENERATING SUBSTRATE AND AEROSOL GENERATING ARTICLE

Description

CROSS-REFERENCE TO PRIOR APPLICATION

This application is a continuation of International Patent Application No. PCT/CN2023/107032, filed on Jul. 12, 2023, which claims priority to Chinese Patent Application No. 202310095263.4, filed on Jan. 20, 2023. The entire disclosure of both applications is hereby incorporated by reference herein.

FIELD

This application relates to the technical field of aerosol generating articles, and in particular, to an aerosol generating substrate and an aerosol generating article.

BACKGROUND

An aerosol generating article includes an aerosol generating article that forms an aerosol in a manner of being ignited and an aerosol generating article that forms an aerosol in a manner of being heated rather than being burned. In a typical aerosol generating article that is heated rather than burned, the aerosol generating article includes an aerosol generating substrate, such as a tobacco raw material, an aroma raw material, and/or an aerosol former that can be evaporated when heated to generate an aerosol. The aerosol generating article is heated by using an external heat source, so that the aerosol generating substrate is heated just enough to release the aerosol. The aerosol generating substrate is not burned. A large quantity of aerosol former s are loaded, so that the aerosol former s are released by high-temperature heating during using, to form vapor.

In the related art, the aerosol generating substrate is prone to problems such as difficulty in inhaling and inconsistent heating in a heating process.

SUMMARY

In an embodiment, the present invention provides an aerosol generating substrate, comprising: a plurality of air holes of at least two cross-sectional shapes, air holes of the plurality of air holes being formed inside the aerosol generating substrate and passing through at least one end of the aerosol generating substrate along a length direction.

BRIEF DESCRIPTION OF THE DRAWINGS

Subject matter of the present disclosure will be described in even greater detail below based on the exemplary figures. All features described and/or illustrated herein can be used alone or combined in different combinations. The features and advantages of various embodiments will become apparent by reading the following detailed description with reference to the attached drawings, which illustrate the following:

FIG. 1 is a schematic diagram of a structure of a first aerosol generating substrate according to an embodiment of this application;

FIG. 2 is a schematic diagram of a structure of the first aerosol generating substrate shown in FIG. 1 from another perspective;

FIG. 3 is a schematic diagram of a structure of a first aerosol generating article according to an embodiment of this application;

FIG. 4 is a cross-sectional view of a direction A-A in FIG. 3;

FIG. 5 is a schematic diagram of a structure of a second aerosol generating substrate according to an embodiment of this application, where a dashed box schematically shows an air hole unit;

FIG. 6 is a schematic diagram of a structure of a third aerosol generating substrate according to an embodiment of this application, where a dashed box schematically shows an air hole unit;

FIG. 7 is a schematic diagram of a structure of a fourth aerosol generating substrate according to an embodiment of this application;

FIG. 8 is a schematic diagram of a structure of the fourth aerosol generating substrate shown in FIG. 7 from another perspective; where a dashed box schematically shows a first group;

FIG. 9 is a schematic diagram of a structure of a fifth aerosol generating substrate according to an embodiment of this application;

FIG. 10 is a schematic diagram of a structure of the fifth aerosol generating substrate shown in FIG. 9 from another perspective;

FIG. 11 is a schematic diagram of a structure of a sixth aerosol generating substrate according to an embodiment of this application;

FIG. 12 is a schematic diagram of a structure of a seventh aerosol generating substrate according to an embodiment of this application;

FIG. 13 is a schematic diagram of a structure of an eighth aerosol generating substrate according to an embodiment of this application;

FIG. 14 is a schematic diagram of a structure of the eighth aerosol generating substrate shown in FIG. 13 from another perspective;

FIG. 15 is a schematic diagram of a structure of a ninth aerosol generating substrate according to an embodiment of this application;

FIG. 16 is a schematic diagram of a structure of a tenth aerosol generating substrate according to an embodiment of this application;

FIG. 17 is a schematic diagram of a structure of an eleventh aerosol generating substrate according to an embodiment of this application;

FIG. 18 is a schematic diagram of a structure of a twelfth aerosol generating substrate according to an embodiment of this application;

FIG. 19 is a cross-sectional view of the first aerosol generating substrate shown in FIG. 2; and

FIG. 20 is a schematic diagram of a structure of a second aerosol generating article according to an embodiment of this application.

DETAILED DESCRIPTION

In an embodiment, the present invention provides an aerosol generating substrate and an aerosol generating article, to improve heating uniformity.

In an embodiment, the present invention provides an aerosol generating substrate, where the aerosol generating substrate includes air holes of at least two cross-sectional shapes, the air holes are formed inside the aerosol generating substrate, and the air holes pass through at least one end of the aerosol generating substrate along a length direction.

In some embodiments, the air holes pass through two opposite ends of the aerosol generating substrate along the length direction; and the aerosol generating substrate is divided into a middle part and an edge part, the edge part surrounds the middle part, a first group including the plurality of air holes is arranged in the middle part, a second group including the plurality of air holes is arranged in the edge part, cross-sectional shapes of the air holes in the first group are the same, and a cross-sectional shape of at least one air hole in the second group is different from the cross-sectional shapes of the air holes in the first group.

In some embodiments, the cross-sectional shapes of the air holes in the first group are circles, and the cross-sectional shapes of the air holes in the second group are a part of the cross-sectional shapes of the air holes in the first group.

In some embodiments, the cross-sectional shapes of the air holes in the first group are regular hexagons, and the cross-sectional shapes of the air holes in the second group are a part of the cross-sectional shapes of the air holes in the first group. In some embodiments, the cross-sectional shapes of the air holes in the first group are rhombuses, and the cross-sectional shapes of the air holes in the second group are a part of the cross-sectional shapes of the air holes in the first group.

In some embodiments, the cross-sectional shapes of the air holes in the first group are regular quadrangles, and the cross-sectional shapes of the air holes in the second group are a part of the cross-sectional shapes of the air holes in the first group.

In some embodiments, all the air holes in the first group are classified into a plurality of air hole units, the plurality of air holes of the air hole units are arranged along a first direction, and the plurality of the air hole units are arranged along a second direction, where the first direction intersects with the second direction.

In some embodiments, the plurality of air holes of the air hole units are linearly arranged along the first direction, and the plurality of air hole units are linearly arranged along the second direction.

In some embodiments, the plurality of air holes of the air hole units are circumferentially arranged along the first direction, and the plurality of air hole units are sleeved one by one along the second direction.

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

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

In some embodiments, a quantity of air holes of the first shapes is more than one, a quantity of air holes of the second shapes is more than one, and each air hole of the second shape is surrounded by at least two air holes of the first shapes.

In some embodiments, a quantity of air holes of the first shapes is more than one and a quantity of air holes of the second shapes is more than one; all the air holes of the first shapes are grouped into a plurality of first row groups, a plurality of air holes in each first row group are linearly arranged along a first direction, and the plurality of first row groups are linearly arranged along a second direction; all the air holes of the second shapes are grouped into a plurality of second row groups, a plurality of air holes in each second row group are linearly arranged along the first direction, and the plurality of second row groups are linearly arranged along the second direction; and the air holes of the first shapes and the air holes of the second shapes are alternately arranged in sequence in the first direction, and the air holes of the first shapes and the air holes of the second shapes are alternately arranged in sequence in the second direction.

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

In some embodiments, a quantity of air holes of the first shapes is four, a quantity of air holes of the second shapes is four, the four air holes of the first shapes are separately symmetrically arranged on two mutually perpendicular straight lines passing through the air hole of the third shape, and one air hole of the second shape is provided between two neighboring air holes of the first shapes.

In some embodiments, a hydraulic diameter of each of the air holes ranges from 0.05 mm and 6 mm; and/or a cross-sectional area of each of the air holes ranges from 0.0019 mm² to 30 mm².

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

In some embodiments, the aerosol generating substrate has a plurality of micropores, and the plurality of micropores are in communication with the air holes.

In some embodiments, the aerosol generating substrate includes a groove provided on a peripheral surface of the aerosol generating substrate, and the groove runs through at least one end of the aerosol generating substrate along the length direction.

Another aspect of this application provides an aerosol generating article, including: the aerosol generating substrate of any one of above;

• • a functional segment, disposed at one end of the aerosol generating substrate along a length direction, where the functional segment includes a filter segment configured to filter out an aerosol; and
  • an outer wrapping layer, wrapped on an outer periphery of the functional segment and an outer periphery of the aerosol generating substrate.

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

The aerosol generating substrate provided in the embodiments of this application is used for being heated to generate an aerosol. Because the aerosol generating substrate is required to be portable for being held by hand by a user, the size of the aerosol generating substrate is limited. With the air holes of at least two cross-sectional shapes, a cross-sectional area and a cross-sectional shape of each air hole can be flexibly designed when the size of the aerosol generating substrate is limited. This not only facilitates adjustment of flow resistance of the aerosol, that is, adjustment of resistance to inhalation when the user inhales, but also facilitates adjustment of substrate mass distribution at different positions of the aerosol generating substrate, thereby improving a heating rate and heating uniformity, and reducing scorching caused by insufficient or excessive heating. In this way, the aerosol can be released as evenly as possible.

It should be noted that, embodiments of this application and technical features in embodiments may be mutually combined in a case that no conflict occurs. Detailed descriptions in a specific implementation should be understood as an explanation of an objective of this application and should not be regarded as an improper limitation on this application.

Referring to FIG. 1 and FIG. 2, the embodiments of this application provide an aerosol generating substrate 10. The aerosol generating substrate 10 is used for being heated to generate an aerosol.

For example, the aerosol generating substrate 10 may be suitable for generating the aerosol in a manner of being heated and burned. The aerosol generating substrate 10 may also be suitable for generating the aerosol in a manner of being heated without being burned. In other words, the aerosol generating substrate 10 is heated below an ignition temperature to generate the aerosol. In other words, the aerosol generating substrate 10 is not burned in a process of generating the aerosol. The embodiments of this application are described by using being heated without being burned as an example.

Still referring to FIG. 1 and FIG. 2, the aerosol generating substrate 10 has air holes 1 of 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 along a length direction. The air holes 1 are used for collection and flow of the aerosol. In other words, there are two or more types of cross-sectional shapes. In this way, cross-sectional shapes of at least two air holes 1 are different.

It should be noted that, cross sections of the air holes 1 are planes perpendicular to flow directions of the air holes 1, and the cross sections of the air holes 1 are overflow cross sections of the air holes 1. The cross sections may be planes perpendicular to the length direction of the aerosol generating substrate 10. The cross-sectional shape of the air hole 1 refers to a shape presented by a cross section of a single air hole 1.

Referring to FIG. 3 and FIG. 4, the aerosol generating substrate 10 provided in the embodiments of this application is used in an aerosol generating article. The aerosol generating article includes an aerosol generating substrate 10, a functional segment 20, and an outer wrapping layer 30 in any embodiment of this application. The functional segment 20 is disposed at one end of the aerosol generating substrate 10 along a length direction, where the functional segment 20 includes a filter segment 21 configured to filter out an aerosol. The outer wrapping layer 30 is wrapped on an outer periphery of the functional segment 20 and an outer periphery of the aerosol generating substrate 10.

The filter segment 21 is configured to filter out an aerosol generated by the aerosol generating substrate 10.

The aerosol generating article is used for a user to inhale the aerosol generated by the aerosol generating substrate 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 substrate 10 is transported to the filter segment 21 through the air holes 1 under an action of a negative pressure caused by inhaling.

The aerosol generating substrate 10 provided in the embodiments of this application is used for being heated to generate an aerosol. Because the aerosol generating substrate 10 is required to be portable for being held by hand by a user, the size of the aerosol generating substrate 10 is limited. With the air holes 1 of at least two cross-sectional shapes, a cross-sectional area and a cross-sectional shape of each air hole 1 can be flexibly designed when the size of the aerosol generating substrate 10 is limited. This not only facilitates adjustment of flow resistance of the aerosol, that is, adjustment of resistance to inhalation when the user inhales, but also facilitates adjustment of substrate mass distribution at different positions of the aerosol generating substrate 10, thereby improving a heating rate and heating uniformity, and reducing scorching caused by insufficient or excessive heating. In this way, the aerosol can be released as evenly as possible.

The aerosol generating article is used for being used together with an aerosol generating device having a heating assembly. Specifically, the heating assembly is configured to heat and atomize the aerosol generating substrate 10 to generate an aerosol.

There are a plurality of heating manners of the heating assembly. For example, the heating manners include central heating, circumferential heating, and/or bottom heating. The manner of central heating means that the heating assembly is inserted into the inside of the aerosol generating article to perform baking and heating on the aerosol generating article from the inside to the outside. The manner of circumferential heating means that the heating assembly is disposed on an outer periphery of the aerosol generating article, to perform baking and heating on the aerosol generating article from the outside to the inside. The manner of bottom heating means that the heating assembly is located below the aerosol generating article, the air is first heated by using the heating assembly, and then the hot air flows from bottom to top to perform baking and heating on the aerosol generating article.

The heating manners of the heating assembly include, but are not limited to, resistance heating, electromagnetic heating, infrared heating, microwave heating, laser heating, or the like.

In some embodiments, referring to FIG. 4, only the filter segment 21 may be disposed on the functional segment 20.

In some other embodiments, referring to FIG. 20, the functional segment 20 further includes a cooling segment 22. The cooling segment 22 is located between the filter segment 21 and the aerosol generating substrate 10. The cooling segment 22 is configured to cool the aerosol before the filter segment 21 filters the aerosol. The cooling segment 22 can improve a phenomenon of “mouth burning” when the user inhales the aerosol.

The outer wrapping layer 30 includes but is not limited to one or a combination of materials such as fiber paper, metal foil, metal foil composite fiber paper, polyethylene composite fiber paper, polyethylene (PE), polybutylene adipate terephthalate (PBAT), and the like.

A cooling material used in the cooling segment 22 includes, but is not limited to, one or a combination of materials such as polyethylene (PE), polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), polypropylene (PP), acetate fiber, propylene fiber, and the like.

A filter material used in the filter segment 21 includes, but is not limited to, one or a combination of materials such as polyethylene (PE), polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), polypropylene (PP), acetate fiber, acrylic fiber, and the like.

The material of the cooling segment 22 and the material of the filter segment 21 may be the same or different.

In some embodiments, the aerosol generating substrate 10 may be basically in a columnar structure. In other words, the aerosol generating substrate 10 is basically in a shape of a long strip, rather than a sheet. A size of the aerosol generating substrate 10 in the length direction is greater than a maximum distance between two points of a cross section of the aerosol generating substrate 10.

For example, on a cross section perpendicular to the length direction of the aerosol generating substrate 10, a cross-sectional shape of the aerosol generating substrate 10 includes, but is not limited to, a circle, an ellipse, a racetrack, a polygon, or the like.

The cross-sectional shape of the aerosol generating substrate 10 is the foregoing regular shape, so that article consistency is good, and article quality is conveniently monitored.

Referring to FIG. 5 to FIG. 19, the cross-sectional shape of the aerosol generating substrate 10 is the circle. In this way, there is basically no sharp corner at an edge of the aerosol generating substrate 10, which can reduce a case of corner collapse caused by stress concentration. The embodiments of this application are described by using an example in which the cross-sectional shape of the aerosol generating substrate 10 is the circle, that is, the aerosol generating substrate 10 is a cylinder. A size of the aerosol generating substrate 10 in the length direction is greater than a maximum distance, for example, a diameter, between two points of a cross section of the aerosol generating substrate 10.

Specific components of the aerosol generating substrate 10 are not limited herein. For example, in an embodiment, the aerosol generating substrate 10 may include a plant component, an auxiliary agent component, an aerosol generating agent component, an adhesive component, and the like. In an embodiment, the plant component is one or a combination of powder formed after a tobacco leave raw material, a tobacco leave fragment, a tobacco stem, tobacco dust, an aromatic plant, and the like are crushed. The plant component is used for generating an aerosol with alkaloids when heated.

In an embodiment, the auxiliary agent component may be one or a combination of an inorganic filler, a lubricant, and an emulsifier. The inorganic filer includes one or a combination of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomite. The inorganic filler may provide a framework support function for the plant component. In addition, the inorganic filler further has micropores, which can increase a porosity of a wall material after the plant component is formed, thereby increasing an aerosol release rate.

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 fluidity of particles, and reduce a friction force between the particles, so that an overall density of the distributed particles can be more uniform, a pressure required for mold forming can also be reduced, and wear and tear of the mold is reduced.

The emulsifier includes one or a combination of polyglycerol fatty acid ester, Tween-80, and polyvinyl alcohol. The emuisifier can relieve loss of a fragrant material during storage to some extent, increase stability of the fragrant material, and improve sensory quality of the article.

A function of the aerosol generating agent component is to generate a large amount of vapor when heated, thereby increasing an amount of vapor of the aerosol generating article. In an embodiment, the aerosol generating agent may include, for example, one or a combination of monohydric alcohol (such as menthol); polyhydric alcohol (such as propylene glycol, triethylene glycol, 1,3-butylene glycol, and glycerol); ester of polyhydric alcohol (such as monoacetin, diacetin, or triacetin); monocarboxylic acid; and polycarboxylic acid (such as lauric acid and myristic acid) or aliphatic ester of polycarboxylic acid (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butylene glycol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, triactin, meso-erythritol, diacetin glyceride mixture, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, glyceryl tributyrate, and lauryl acetate).

In an embodiment, the adhesive component is extracted from natural plants and is non-ionized modified viscous polysaccharide, including one or a combination of tamarind polysaccharide, pullulan, seaweed polysaccharide, locust bean gum, guar gum, and xyloglucan. The adhesive is used to bond the particles together, preventing the particles from loosening. In addition, the adhesive improves water resistance of the aerosol generating substrate, is harmless to the human body, and has a specific health care effect.

In an embodiment, the aerosol generating substrate 10 is an integrally formed structure. For example, the aerosol generating substrate 10 may be an integrally formed structure formed by using a process such as injection molding, compression molding, or extrusion molding. The extrusion molding refers to a processing method in which a raw material mixture is added to an extruder, and under an action between an extruder barrel and a screw, the material is heated and plasticized, is pushed forward by the screw, and is continuously formed into various cross-section articles or semi-finished articles through a die. The aerosol substrate formed by the extrusion molding is in a shape of a strip. In this way, the aerosol generating substrate 10 is an integrated substrate after being heated and inhaled or heating performed on the aerosol generating substrate 10 stops, and is not prone to problems of disintegration and falling off. This resolves problems in the related art that in three types of aerosol generating substrates, namely, a sheet-shaped aerosol generating substrate, a dispersed granular aerosol generating substrate, and a filamentous aerosol generating substrate, sheet loosing and falling off, falling off of filamentous components and granular components, and difficulty in cleaning may occur.

In an embodiment, referring to FIG. 1, FIG. 2, and FIG. 5 to FIG. 8, the air holes 1 pass through two opposite ends of the aerosol generating substrate 10 along the length direction; and the aerosol generating substrate 10 is divided into a middle part 11 and an edge part 12, the edge part 12 surrounds the middle part 11, a first group 101 including the plurality of air holes 1 is arranged in the middle part 11, a second group 102 including a plurality of air holes 1 is arranged in the edge part 12, cross-sectional shapes of the air holes 1 in the first group 101 are the same, and a cross-sectional shape of at least one air hole 1 in the second group 102 is different from the cross-sectional shapes of the air holes 1 in the first group 101. In other words, the air holes 1 in the second group 102 surround the air holes 1 in the first group 101. The air holes of different cross-sectional shapes are concentrated and distributed in different regions. This is not only convenient for manufacturing, but also convenient for controlling substrate mass distribution of the aerosol generating substrate 10 by properly arranging different cross-sectional shapes. On a condition that the size of the aerosol generating substrate 10 is fixed, total cross-sectional areas of the air holes 1 are increased as much as possible and the thicknesses of partition walls are consistent as much as possible, to achieve good heat transfer consistency in a heating process and consistency of release of the aerosol in a process in which the substrate is heated and inhaled. In this way, both structural stability of the aerosol generating substrate 10 and uniformity of the release of the aerosol are considered, thereby improving inhaling experience.

For example, in an embodiment, referring to FIG. 2 and FIG. 6, the cross-sectional shapes of the air holes 1 in the second group 102 are different from the cross-sectional shapes of the air holes 1 in the first group 101. In other words, the cross-sectional shapes of the air holes 1 in the second group 102 are different from the cross-sectional shapes of the air holes 1 in the first group 101.

For example, in an embodiment, referring to FIG. 5 and FIG. 8, cross-sectional shapes of some air holes 1 in the second group 102 are different from the cross-sectional shapes of the air holes 1 in the first group 101, and cross-sectional shapes of the other air holes 1 in the second group 102 are the same as the cross-sectional shapes of the air holes 1 in the first group 101.

For example, in an embodiment, referring to FIG. 2, the cross-sectional shapes of the air holes 1 in the first group 101 are of the first shapes 100, and the cross-sectional shapes of the air holes 1 in the second group 102 are the same and are of the second shapes 200. In other words, all the air holes 1 of the first shapes 100 are distributed in the middle part 11, and all the air holes 1 of the second shapes 200 are distributed in the edge part 12. The air holes 1 of the second shapes 200 surround all the air holes 1 of the first shapes 100.

In a specific embodiment, referring to FIG. 2, the cross-sectional shapes of the air holes 1 in the first group 101 are circles, and the cross-sectional shapes of the air holes 1 in the second group 102 are a part of the cross-sectional shapes of the air holes 1 in the first group 101. The cross-sectional shapes of the air holes in the second group 102 are a part of circles. For example, the cross-sectional shapes of the air holes in the second group 102 are arcs. The circle-shaped air holes 1 can improve transverse support strength of the aerosol generating substrate 10, and improve reprocessing performance of the aerosol generating substrate 10.

In a specific embodiment, referring to FIG. 5, the cross-sectional shapes of the air holes 1 in the first group 101 are regular hexagons, and the cross-sectional shapes of the air holes 1 in the second group 102 are a part of the cross-sectional shapes of the air holes 1 in the first group 101. The cross-sectional shapes of the air hole in the second group 102 are a part of regular hexagons. For example, the cross-sectional shapes of the air holes in the second group 102 are trapezoids. The regular hexagon is an optimal topological structure for covering a two-dimensional plane, and the air holes 1 in shapes of the regular hexagon can divide a cross section of the middle part in a more evenly manner.

In a specific embodiment, referring to FIG. 6, the cross-sectional shapes of the air holes 1 in the first group 101 are rhombuses, and the cross-sectional shapes of the air holes 1 in the second group 102 are a part of the cross-sectional shapes of the air holes 1 in the first group 101. The cross-sectional shapes of the air holes in the second group 102 are a part of rhombuses. For example, the cross-sectional shapes of the air holes in the second group 102 are triangles. The rhombus-shaped air holes 1 can improve lateral cutting performance of the aerosol generating substrate 10, and reduce a deformation phenomenon caused by cutting during processing of the aerosol generating substrate 10.

In a specific embodiment, referring to FIG. 7, the cross-sectional shapes of the air holes 1 in the first group 101 are regular quadrangles, and the cross-sectional shapes of the air holes 1 in the second group 102 are a part of the cross-sectional shapes of the air holes 1 in the first group 101. The cross-sectional shapes of the air holes in the second group 102 are a part of right quadrangles. For example, the cross-sectional shapes of the air holes in the second group 102 are triangles. The regular quadrangle has a feature that side lengths are fixed, which can improve utilization of the cross section of the aerosol generating substrate 10, and can improve heating uniformity of the aerosol generating substrate 10.

For example, in an embodiment, referring to FIG. 6 to FIG. 8, the cross-sectional shapes of the air holes 1 in the first group 101 are the first shapes 100, and there are two or more cross-sectional shapes in the second group 102. For example, the cross-sectional shapes in the second group 102 may include the second shapes 200 and the third shape 300.

For example, in an embodiment, the cross-sectional shapes of the air holes 1 in the second group 102 are different.

In other words, a quantity of cross-sectional shapes in the second group 102 is equal to a quantity of air holes 1 in the second group 102. For example, if the quantity of air holes 1 in the second group 102 is five, the air holes 1 in the second group 102 have five cross-sectional shapes.

For another example, if the quantity of air holes 1 in the second group 102 is six, the air holes 1 in the second group 102 have six cross-sectional shapes.

It should be noted that, in the embodiments of this application, a plurality of means two or more.

In an embodiment, referring to FIG. 1, FIG. 2, and FIG. 5 to FIG. 8, parts of the cross-sectional shapes of the air holes 1 in the first group 101 are the same as the cross-sectional shapes of the air holes 1 in the second group 102. For example, the parts of the air holes 1 in the first group 101 are cut by the edge part 12 to form the air holes 1 in the second group 102. An example in which the aerosol generating substrate 10 is manufactured into an integrally formed structure through an extrusion process is used. In a process in which the atomized substrate is extruded from a mold, an edge mold cooperates with a peripheral mold surrounding and forming a mold cavity to form the air holes 1 in the second group 102. In other words, the peripheral mold surrounds and forms a peripheral wall forming the mold cavity to press an outer periphery of the atomized substrate, and the outer periphery cuts the air holes 1 in the first group 101 that are close to the outer periphery to form the air holes 1 in the second group 102.

In a specific embodiment, referring to FIG. 6, the cross-sectional shapes of the air holes 1 in the first group 101 are rhombuses, the air holes 1 in the first group 101 are evenly distributed, and the parts of the cross-sectional shapes of the air holes 1 in the first group 101 are the same as the cross-sectional shapes of the air holes 1 in the second group 102 (shapes of some air holes 1 in the second group 102 are similar to a sector). Advantages of such distribution are that the porosity is increased, the thicknesses of the partition walls are consistent, heat transfer efficiency is consistent, and the substrate is uniformly released. An angle of a single rhombus-shaped air hole 1 is not consistent. When the aerosol flows through the rhombus-shaped air holes 1, more turbulence is formed at places with small angles, and flow rates are different.

The flow rate of the aerosol in the air holes 1 of irregular shapes in the second group 102 is also different from that in the rhombus-shaped air holes 1. Aerosols with different rates but similar components are gradually obtained, which can improve inhaling experience and enhance sensory consistency.

In a specific embodiment, referring to FIG. 5, the cross-sectional shapes of the air holes 1 in the first group 101 are regular hexagons, the air holes 1 in the first group 101 are evenly distributed, and the parts of the cross-sectional shapes of the air holes 1 in the first group 101 are the same as the cross-sectional shapes of the air holes 1 in the second group 102 (shapes of the air holes 1 in the second group 102 are similar to trapezoids, with bases being an arc). Advantages of such distribution are that the porosity is increased, the wall thickness of the substrate is uniform and stable, the heat transfer is stable, the release is stable, and aerosols with different rates can be formed in the air holes 1 in the second group 102. The shapes are group as the regular hexagons, so that the lateral strength can be improved and a yield rate during processing can be improved. In addition, the setting can increase an aerosol release area inside the aerosol generating substrate 10 and uniformity of substrate mass distribution is good. During heating and inhaling, an aerosol release rate is high and the aerosol is stably released, thereby improving use experience of a consumer.

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

In an 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 air holes 1 of the second shapes 200 are distributed in the edge part 12.

For example, cross-sectional areas of the air holes 1 of the second shapes 200 are less than cross-sectional areas of the air holes 1 of the first shapes 100, and the air holes 1 of the second shapes 200 are distributed in the edge part 12. In this way, the air holes 1 of the first shapes 100 and the air holes 1 of the second shapes 200 can be distributed on the whole aerosol generating substrate 10 as much as possible. This can not only effectively increase a quantity of air flow channels, but also avoid excessively thin wall thicknesses due to the excessively large cross-sectional areas of the air holes 1.

In an embodiment, the part of the first shape 100 is cut by the edge part 12 to form the second shape 200. An example in which the aerosol generating substrate 10 is manufactured into an integrally formed structure through an extrusion process is used. In a process in which the atomized substrate is extruded from a mold, an edge mold cooperates with a peripheral mold surrounding and forming a mold cavity to form the air holes 1 of the second shapes 200. In other words, the peripheral mold surrounds and forms a peripheral wall forming the mold cavity to press an outer periphery of the atomized substrate, and the outer periphery cuts the air holes 1 of the first shapes 100 that are close to the outer periphery to form the air holes 1 of the second shapes 200.

In an embodiment, referring to FIG. 1, FIG. 2, and FIG. 5 to FIG. 8, the air holes 1 in the first group 101 are evenly distributed and formed in the middle part 11. For example, the air holes 1 of the first shapes 100 are evenly distributed in the middle part 11. With such a design, mass distribution at different positions of the middle part 11 tends to be the same, and cross-sectional areas of the air holes 1 at the different positions of the middle part 11 tend to be the same, so that release amounts and flow resistance of aerosols at the different positions of the middle part 11 tend to be the same. In this way, uniformity of release of the aerosols in an inhaling process can be improved, and an inhaling amount per puff in the inhaling process tends to be the same, so that inhaling consistency is improved, and inhaling experience is good.

It should be understood that, a form of even distribution means that the air holes 1 are evenly distributed.

An implementation of even distribution of the air holes 1 of the first shapes 100 is not limited. For example, in some embodiments, referring to FIG. 1, FIG. 2, and FIG. 5 to FIG. 8, even distribution of the air holes 1 of the first shapes 100 includes: cross-sectional areas of the first shapes 100 are the same, and thicknesses of partition walls of two neighboring first shapes 100 are the same.

An implementation in which cross-sectional areas of the air holes 1 of the first shapes 100 are the same may be: The air holes 1 of the first shapes 100 have the same cross-sectional shape and have the same hydraulic diameters in cross sections. For example, the cross-sectional shapes of the air holes 1 of the first shapes 100 are circles and diameters of the cross sections of the air holes 1 of the first shapes 100 are the same.

It should be noted that, the hydraulic diameter refers to a ratio of four times of an area of an overflow cross section to a circumference. The overflow cross section refers to a cross section, namely, the cross section of the air hole 1, perpendicular to streamline clusters of fluid. For example, if the cross-sectional shape of the air hole 1 is a right quadrangle, the hydraulic diameter is a ratio of four times of the cross-sectional area of the right quadrangle-shaped air hole 1 to a circumference of the right quadrangle. For another example, the cross-sectional shape of the air hole 1 is a circle, and the hydraulic diameter is a diameter of the circle-shaped air hole 1.

In an embodiment, referring to FIG. 5 and FIG. 6, all the air holes 1 of the first shapes 100 are classified into a plurality of air hole units 1011, the plurality of air holes 1 of the air hole units 1011 are arranged along a first direction, and the plurality of the air hole units 1011 are arranged along a second direction, where the first direction intersects with the second direction. In this way, all the air holes 1 are arranged in a two-dimensional manner, so that both structural strength of the aerosol generating substrate 10 and an aerosol release amount of the aerosol generating substrate 10 can be considered, thereby facilitating effective use of the aerosol generating substrate 10.

In an embodiment, referring to FIG. 2, FIG. 5, FIG. 6, and FIG. 8, the plurality of air holes 1 of the air hole units 1011 are linearly arranged along the first direction, and the plurality of air hole units 1011 are linearly arranged along the second direction. For example, a distribution manner of all the air holes 1 of the first shapes 100 is matrix distribution or grid distribution. In this way, all the air holes 1 of the first shapes 100 are arranged in an orderly manner, thereby facilitating design and manufacture, so that article consistency is good. It may be understood that, the orderly arrangement refers to performing arrangement according to a set rule.

In an embodiment, the plurality of air holes 1 of the air hole units 1011 are circumferentially arranged along the first direction, and the plurality of air hole units 1011 are sleeved one by one along the second direction. In other words, all the air holes 1 of the first shapes 100 are distributed in a plurality of sleeved rings. For example, each ring may be in a shape of a circular ring, and circle centers of the plurality of circular rings coincide or do not coincide with each other. The circle centers of the plurality of circular rings coincide with each other, and the plurality of sleeved rings are distributed as a plurality of concentric circles. In this way, all the air holes 1 of the first shapes 100 are arranged in an orderly manner, thereby facilitating design and manufacture, so that article consistency is good. For example, spacings between different circular rings and/or a quantity of air holes 1 in the same circular ring are adjusted, so that mass distribution of the aerosol generating substrate 10, heating rates at different positions of the middle part 11, and/or flow resistance of the aerosol may be adjusted, to improve inhaling experience of the user.

In an embodiment, referring to FIG. 1, FIG. 2, and FIG. 5 to FIG. 16, a cross-sectional shape of at least one air hole 1 is a first shape 100, and a cross-sectional shape of the at least one air hole 1 is a second shape 200. The first shape 100 is different from the second shape 200. For example, a cross-sectional shape of one air hole 1 may be the first shape 100, or cross-sectional shapes of two or more air holes 1 may be the first shapes 100. For example, a cross-sectional shape of one air hole 1 may be the second shape 200, or cross-sectional shapes of two or more air holes 1 may be the second shapes 200.

In an 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. In other words, the second shape 200 is a part of the first shape 100, and the second shape 200 may overlap with the part of the first shape 100. For example, the first shape 100 may be a circle, and the second shape 200 is a semi-circle or an arc. For another example, the first shape 100 may be a regular quadrangle, and the second shape 200 may be a sector or a triangle.

For example, in an embodiment, referring to FIG. 1, FIG. 2, and FIG. 5 to FIG. 16, the first shape 100 may be a circle, an ellipse, a sector, or a polygon. The polygon includes but is not limited to a triangle, a quadrangle, a pentagon, a hexagon, or the like. The quadrangle may be a square, a rhombus, or the like. The cross-sectional shape of the air hole 1 is a regular shape, so that article consistency is good, and article quality is conveniently monitored.

In an embodiment, referring to FIG. 1, FIG. 2, and FIG. 5 to FIG. 16, the second shape 200 may be a circle, an ellipse, a sector, an arc, a polygon, or an irregular shape. The polygon includes but is not limited to a triangle, a quadrangle, a pentagon, a hexagon, or the like. The quadrangle may be a square, a rhombus, or the like. The cross-sectional shape of the air hole 1 is a regular shape, so that article consistency is good, and article quality is conveniently monitored. Alternatively, the cross-sectional shape of the air hole 1 may be an irregular shape.

In an embodiment, referring to FIG. 9 to FIG. 12, a quantity of air holes 1 of the first shapes 100 is more than one, a quantity of air holes 1 of the second shapes 200 is more than one, and each air hole 1 of the second shape 200 is surrounded by at least two air holes 1 of the first shapes 100. With such a design, the air holes 1 of the second shapes 200 are placed in a region surrounded by at least two air holes 1 of the first shapes 100. In this way, substrate quality in the region surrounded by the at least two air holes 1 of the first shapes 100 may be adjusted through the air holes 1 of the second shapes 200, to adjust resistance to inhalation, a release amount and a heating rate of the aerosol, and the like.

For example, in an embodiment, cross-sectional areas of the air holes 1 of the second shapes 200 are less than cross-sectional areas of the air holes 1 of the first shapes 100, and each air hole 1 of the second shape 200 is surrounded by at least two air holes 1 of the first shapes 100. In this way, on a condition that the cross-sectional area of the aerosol generating substrate 10 is kept unchanged, in comparison to using all the air holes 1 of the first shapes 100, the air holes 1 of the second shapes 200 are placed in the region surrounded by the at least two air holes 1 of the first shapes 100, so that the thickness of the partition wall between two neighboring air holes 1 is relatively thick, and the release amount of the aerosol may be relatively large, to avoid the air holes 1 from collapsing to some extent.

In a specific embodiment, referring to FIG. 9 and FIG. 10, the second shape 200 is a rhombus, a regular triangle, a regular hexagon, or another regular polygon, the first shape 100 is a circle, and each air hole 1 of the second shape 200 is surrounded by the at least two air holes 1 of the first shapes 100. Advantages of such distribution are that the rhombus-shaped air holes 1 can fill space between the circle-shaped air holes 1, increase the overall porosity, reduce the thickness of the partition wall between the circle-shaped air holes 1, and make the wall thickness relatively uniform, which can improve the heat transfer efficiency and the release rate of the aerosol, to reduce waiting time for heating during inhaling by the user, and improve use experience of the user.

In a specific embodiment, referring to FIG. 12, the second shape 200 is a rhombus, the first shape 100 is a regular pentagon, and each air hole 1 of the second shape 200 is surrounded by at least two air holes 1 of the first shapes 100. Advantages of such distribution are that the rhombus-shaped air holes 1 can fill space between the regular pentagon-shaped air holes 1, increase the overall porosity, reduce the wall thickness of a region surrounded and formed by four regular pentagon-shaped holes, and make the wall thickness relatively uniform, which can improve the heat transfer efficiency, the substrate release rate, and the inhaling consistency.

In an embodiment, referring to FIG. 13 to FIG. 15, a quantity of air holes 1 of the first shapes 100 is more than one, and a quantity of air holes 1 of the second shapes 200 is more than one. All the air holes 1 of the first shapes 100 are grouped into a plurality of first row groups, a plurality of air holes 1 in each first row group are linearly arranged along a first direction, and the plurality of first row groups are linearly arranged along a second direction. All the air holes 1 of the second shapes 200 are grouped into a plurality of second row groups, a plurality of air holes 1 in each second row group are linearly arranged along the first direction, and the plurality of second row groups are linearly arranged along the second direction. In other words, all the air holes 1 of the second shapes 200 are distributed in a two-dimensional matrix. The air holes 1 of the first shapes 100 and the air holes 1 of the second shapes 200 are alternately arranged in sequence in the first direction, and the air holes 1 of the first shapes 100 and the air holes 1 of the second shapes 200 are alternately arranged in sequence in the second direction. Being alternately arranged in sequence in the first direction means that one air hole 1 of the second shape 200 is provided between any two neighboring air holes 1 of the first shapes 100 in the first direction. Being alternately arranged in sequence in the second direction means that one air hole 1 of the second shape 200 is provided between any two neighboring air holes 1 of the first shapes 100 in the second direction.

With such a design, mass distribution at different positions of the aerosol generating substrate 10 tends to be the same, and cross-sectional areas of the air holes 1 at the different positions of the aerosol generating substrate 10 tend to be the same, so that release amounts and flow resistance of aerosols at the different positions of the aerosol generating substrate 10 tend to be the same. In this way, uniformity of release of the aerosols in an inhaling process can be improved, and an inhaling amount per puff in the inhaling process tends to be the same, so that inhaling consistency is improved, and inhaling experience is good.

In a specific embodiment, referring to FIG. 13 to FIG. 15, the second shape 200 is a rhombus, a regular triangle, a regular hexagon, or another regular polygon. The first shape 100 is a circle. The air holes 1 of the first shapes 100 and the air holes 1 of the second shapes 200 are alternately arranged in sequence in the first direction, and the air holes 1 of the first shapes 100 and the air holes 1 of the second shapes 200 are alternately arranged in sequence in the second direction. Advantages of such distribution are that an area of a regular polygon having a same circumference as that of a circle is less than an area of the circle. On a condition that the cross-sectional area of the aerosol generating substrate 10 is specified, the circle and the regular polygon such as a regular triangle or a regular hexagon are arranged at intervals, so that a substrate mass per unit volume may be increased, stability of the air holes 1 may be increased, and inhalation times may be increased.

In an embodiment, referring to FIG. 16, an air hole 1 whose cross-sectional shape is a third shape 300 is provided on a center line of the aerosol generating substrate 10. In this way, the air hole 1 of the third shape 300 is provided at the center of the aerosol generating substrate 10. According to a hydrodynamic rule, in an inhaling process at a negative pressure, a central flow rate is greater than a peripheral flow rate. Therefore, the air hole 1 of the third shape 300 is provided on a center line of the aerosol generating substrate 10 may further strengthen uniform release of the aerosol from the center to the periphery or stabilize uniform release of the aerosol in the entire aerosol generating substrate 10.

It should be noted that, the center line of the aerosol generating substrate 10 is a connection line between geometric centers of two end surfaces of the aerosol generating substrate 10 along the length direction. An example in which the aerosol generating substrate 10 is a cylinder is used. The center line of the aerosol generating substrate 10 is a connection line between circle centers of two circle-shaped end surfaces of the aerosol generating substrate 10 along the length direction.

In an embodiment, referring to FIG. 16, a quantity of air holes 1 of the first shapes 100 is four, a quantity of air holes 1 of the second shapes 200 is four, the four air holes 1 of the first shapes 100 are separately symmetrically arranged on two mutually perpendicular straight lines passing through the air hole 1 of the third shape 300, and one air hole 1 of the second shape 200 is provided between two neighboring air holes 1 of the first shapes 100. In this way, the nine air holes 1 are basically distributed in a shape of a pound sign. The air holes 1 with different cross-sectional areas are properly combined, so that substrate mass distribution is moderate, thereby facilitating uniform release of the aerosol.

In a specific embodiment, referring to FIG. 16, a first shape 100 is a sector, a second shape 200 is a rectangle, and a third shape 300 is a right quadrangle. A quantity of air holes 1 of the first shapes 100 is four, a quantity of air holes 1 of the second shapes 200 is four, the four air holes 1 of the first shapes 100 are separately symmetrically arranged on two mutually perpendicular straight lines passing through the air hole 1 of the third shape 300, and one air hole 1 of the second shape 200 is provided between two neighboring air holes 1 of the first shapes 100.

In an embodiment, a cross-sectional area of each of the air holes 1 ranges from 0.0019 mm² (square millimeter) to 30 mm². For example, the cross-sectional area of each of the air holes 1 is 0.002 mm², 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, 4 mm², 5 mm², 6 mm², or the like.

When the cross-sectional area of each of the air holes 1 is greater than 30 mm², the quantity of air holes 1 is relatively small, scorching is prone to occur in the aerosol generating substrate 10, and non-uniform release of the aerosol (for example, a large release amount of the aerosol in the first two puffs and a small release amount of the aerosol in the last several puffs) is prone to occur in the heating process of the aerosol generating substrate 10, affecting inhaling experience of the user.

When the cross-sectional area of each of the air holes 1 is less than 0.0019 mm², difficulty in a forming process is significantly increased, the size of the air hole 1 is not easily controlled, and a bad article rate of the aerosol generating substrate 10 is increased.

However, when the cross-sectional area of the air hole 1 ranges from 0.0019 mm² to 30 mm², flow resistance of the aerosol generating substrate 10 is relatively small (that is, resistance to inhalation is relatively small), and a flow rate of the aerosol is appropriate. The aerosol inside the aerosol generating substrate 10 is easily extracted, and the release of the aerosol is relatively uniform and utilization is relatively high. The aerosol generating substrate 10 is not prone to scorching, the use experience of the user is relatively good, and it is also convenient to process and manufacture.

Preferably, the cross-sectional area of each of the air holes 1 ranges from 0.007 mm² to 7.1 mm² (square millimeter), 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, or the like.

For example, a hydraulic diameter of each of the air holes 1 ranges from 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, or the like.

When the hydraulic diameter of the air hole 1 is greater than 6 mm, the quantity of air holes 1 is relatively small, scorching is prone to occur in the aerosol generating substrate segment 10, and non-uniform release of the aerosol (for example, a large release amount of the aerosol in the first two puffs and a small release amount of the aerosol in the last several puffs) is prone to occur in the heating process of the aerosol generating substrate segment 10, affecting inhaling experience of the user. When the hydraulic diameter of the air hole 1 is less than 0.05 mm, difficulty in a forming process is significantly increased, the size of the air hole 1 is not easily controlled, and a bad article rate of the aerosol generating substrate segment 10 is increased.

However, when the hydraulic diameter of the air hole 1 ranges from 0.05 mm to 6 mm, flow resistance of the aerosol generating substrate segment 10 is relatively small (that is, resistance to inhalation is relatively small), and a flow rate of the aerosol is appropriate. The aerosol inside the aerosol generating substrate segment 10 is easily extracted, and the release of the aerosol is relatively uniform and utilization is relatively high. The aerosol generating substrate segment 10 is not prone to scorching, the use experience of the user is relatively good, and it is also convenient to process and manufacture.

In some embodiments, a hydraulic diameter of each of the air holes 1 ranges from 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, or 3 mm.

For example, in an embodiment, the third shape 300 may be a circle, an ellipse, a sector, or a polygon. The polygon includes but is not limited to a triangle, a quadrangle, a pentagon, a hexagon, or the like. The quadrangle may be a square, a rhombus, or the like. The cross-sectional shape of the air hole 1 is a regular shape, so that article consistency is good, and article quality is conveniently monitored.

In an embodiment, the aerosol generating substrate 10 has a plurality of micropores, and the plurality of micropores are in communication with the air holes 1. Specifically, the plurality of micropores are in communication with a surface of a material. In other words, the plurality of micropores can be in communication with the air holes 1. The micropores have a capillarity effect, and the micropores can introduce the aerosol into the air holes 1 through the capillarity effect. The aerosol generated by the aerosol generating substrate 10 may flow into the air holes 1 through the micropores, and the aerosol is collected through the air holes 1. In this way, utilization of effective components of the aerosol generating substrate 10 may be improved.

It should be understood that, the plurality of micropores are randomly arranged. In other words, the micropores are randomly generated. The plurality of micropores are randomly arranged. The random arrangement means that there is no set rule, for example, positions at which the micropores are formed basically cannot be accurately controlled manually in a process in which the micropores are formed.

In an embodiment, referring to FIG. 11, the aerosol generating substrate 10 includes a groove 2 provided on a peripheral surface of the aerosol generating substrate 10, and the groove 2 runs through at least one end of the aerosol generating substrate 10 along the length direction. Specifically, the groove 2 has a notch facing outward. The groove 2 may increase an area of an outer surface of the aerosol generating substrate 10, thereby improving heat conduction efficiency, and more facilitating extraction of the effective components. For example, if the heating manner is the circumferential heating, an overall heating rate of the aerosol generating substrate 10 may be further adjusted in this manner, to improve use experience of a consumer. In addition, for example, because an outer wrapping layer 30 is wrapped on an outer periphery of the aerosol generating substrate 10, the outer wrapping layer 30 can close the notch of the groove 2. The outer wrapping layer 30 cooperates with the groove 2 to form through holes that open only toward two ends of the length direction of the aerosol generating substrate 10. In other words, the outer wrapping layer 30 cooperates with the groove 2 to form a channel similar to the air holes 1, and may also play a role of collecting the aerosol, to play a role of flow guiding that restricts flow of the aerosol and the external air along the length direction, thereby increasing an air inflow amount and improving the extraction efficiency of the aerosol.

In some embodiments, referring to FIG. 4, the air holes 1 may be vertical holes. In other words, a single air hole 1 extends linearly along the length direction. In this way, the air holes 1 are easily formed and have low manufacturing difficulty.

In some embodiments, cross-sectional areas of the air holes 1 at any position along the length direction are the same. For example, an example in which the cross-sectional shapes of the air holes 1 are circles is used. Diameters of the air holes 1 at any position along the length direction are the same. That is, the air holes 1 are diameter-equal holes.

In some embodiments, referring to FIG. 11, a single groove 2 may extend linearly along the length direction. In this way, the groove 2 is easily formed and has low manufacturing difficulty.

In some embodiments, referring to FIG. 11, a cross-sectional area of the groove 2 at any position along the length direction of the aerosol generating substrate 10 is the same.

It should be noted that, in the embodiments of this application, if not specifically described, the length direction refers to the length direction of the aerosol generating substrate 10.

In the embodiments of this application, an air flow channel includes the air holes 1 and/or the groove 2.

In some embodiments, referring to FIG. 17, the whole air flow channel runs through the same end of the aerosol generating substrate 10 along the length direction, and the other end of the aerosol generating substrate 10 is closed. In other words, all the air holes 1 and/or the groove 2 open/opens toward the same end.

In some other embodiments, referring to FIG. 18, one part of the air flow channel runs through one end of the aerosol generating substrate 10 along the length direction, and the other part of the air flow channel runs through the other end of the aerosol generating substrate 10 along the length direction. For example, one part of air holes 1 may pass through one end of the aerosol generating substrate 10 along the length direction, and the other part of air holes 1 may pass through the other end of the aerosol generating substrate 10 along the length direction.

In some other embodiments, referring to FIG. 19, each air flow channel runs through two ends of the aerosol generating substrate 10 along the length direction, and the air flow may flow from one end of the aerosol generating substrate 10 along the length direction to the other end of the aerosol generating substrate 10 along the length direction through the air flow channel.

It should be noted that, the air flow channel such as the air hole 1 and the groove 2 belongs to a macroscopically hole or groove, the micropore belongs to a microscopically hole or groove, and both the cross-sectional area of the air hole 1 and the cross-sectional area of the groove 2 are much greater than a cross-sectional area of the micropore.

For example, the cross-sectional area of the air flow channel is at least 20 times of the cross-sectional area of the micropore. In a case in which the size of the micropore is basically unchanged, when the cross-sectional area of the air flow channel is less than 20 times of the cross-sectional area of the micropore, the size of the air flow channel is excessively small, and it is not easy for the aerosol to be released from an inner wall of the air flow channel to the air flow channel. In addition, resistance to inhalation by the user is great, and inhaling experience of the user deteriorates. Therefore, in this embodiment, when the cross-sectional area of the air flow channel is greater than or equal to 20 times of the cross-sectional area of the micropore, the release rate of the aerosol from an inner wall of the air flow channel can be ensured, and the resistance to inhalation can also be reduced, thereby improving the inhaling experience of the user.

In some embodiments, the cross-sectional area of the air flow channel is 20 times to 60000 times greater than the cross-sectional area of the micropore. If the cross-sectional area of the air flow channel exceeds 60000 times of the cross-sectional area of the micropore, the area of the air flow channel is excessively large, the overall mass of the aerosol generating substrate decreases, substrate utilization is low, a heating rate is relatively high, and the aerosol is easily released from the micropores to the environment.

For example, the cross-sectional area of the air flow channel is 100 times to 40000 times greater than the cross-sectional area of the micropore.

For example, the cross-sectional area of the micropore ranges from 0.7 nm² (square nanometer) to 710 μm² (square micrometer), 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, or the like.

When the cross-sectional area of the micropore is less than 0.7 nm², effective components inside the substrate do not easily evaporate and enter the air holes 111, which causes a reduction in the utilization of the substrate. However, when the cross-sectional area of the micropore in the substrate body is greater than 710 μm², inconsistent heat conduction is caused in the micropores, resulting in deteriorating inhaling experience. Therefore, in this embodiment, the cross-sectional area of the micropore is controlled to range from 0.7 nm² to 710 μm², so that the substrate utilization can be considered, and the inhaling experience can be improved.

More preferably, the cross-sectional area of the micropore ranges from 1963 nm² to 20 μm².

For example, the hydraulic diameter of the micropore ranges from 10 nm (nanometer) to 30 μm (micrometre), 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, or 3 μm.

While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive. It will be understood that changes and modifications may be made by those of ordinary skill within the scope of the following claims. In particular, the present invention covers further embodiments with any combination of features from different embodiments described above and below. Additionally, statements made herein characterizing the invention refer to an embodiment of the invention and not necessarily all embodiments.

The terms used in the claims should be construed to have the broadest reasonable interpretation consistent with the foregoing description. For example, the use of the article “a” or “the” in introducing an element should not be interpreted as being exclusive of a plurality of elements. Likewise, the recitation of “or” should be interpreted as being inclusive, such that the recitation of “A or B” is not exclusive of “A and B,” unless it is clear from the context or the foregoing description that only one of A and B is intended. Further, the recitation of “at least one of A, B and C” should be interpreted as one or more of a group of elements consisting of A, B and C, and should not be interpreted as requiring at least one of each of the listed elements A, B and C, regardless of whether A, B and C are related as categories or otherwise. Moreover, the recitation of “A, B and/or C” or “at least one of A, B or C” should be interpreted as including any singular entity from the listed elements, e.g., A, any subset from the listed elements, e.g., A and B, or the entire list of elements A, B and C.