Aerosol generating substrate and aerosol generating article

Abstract

An aerosol generating substrate includes: 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. In an embodiment, the air holes pass through two opposite ends of the aerosol generating substrate along the length direction. The aerosol generating substrate is divided into a middle part and an edge part, the edge part surrounding the middle part. A first group of air holes of the plurality of air holes is arranged in the middle part. A second group of air holes of the plurality of air holes is arranged in the edge part. Cross-sectional shapes of the air holes in the first group of air holes are the same.

What is claimed is: 
     
         1 . 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.   
     
     
         2 . The aerosol generating substrate of  claim 1 , wherein the air holes pass through two opposite ends of the aerosol generating substrate along the length direction,
 wherein the aerosol generating substrate is divided into a middle part and an edge part, the edge part surrounding the middle part,   wherein a first group of air holes of the plurality of air holes is arranged in the middle part,   wherein a second group of air holes of the plurality of air holes is arranged in the edge part,   wherein cross-sectional shapes of the air holes in the first group of air holes are the same, and   wherein a cross-sectional shape of at least one air hole in the second group of air holes is different from the cross-sectional shapes of the air holes in the first group of air holes.   
     
     
         3 . The aerosol generating substrate of  claim 2 , wherein the cross-sectional shapes of the air holes in the first group of are holes comprise circles, and
 wherein the cross-sectional shapes of the air holes in the second group of air holes are a part of the cross-sectional shapes of the air holes in the first group of air holes.   
     
     
         4 . The aerosol generating substrate of  claim 2 , wherein the cross-sectional shapes of the air holes in the first group of air holes comprise regular hexagons, and
 wherein the cross-sectional shapes of the air holes in the second group of air holes are a part of the cross-sectional shapes of the air holes in the first group of air holes.   
     
     
         5 . The aerosol generating substrate of  claim 2 , wherein the cross-sectional shapes of the air holes in the first group of air holes comprise rhombuses, and
 wherein the cross-sectional shapes of the air holes in the second group of air holes are a part of the cross-sectional shapes of the air holes in the first group of air holes.   
     
     
         6 . The aerosol generating substrate of  claim 2 , wherein the cross-sectional shapes of the air holes in the first group of air holes comprise regular quadrangles, and
 wherein the cross-sectional shapes of the air holes in the second group of air holes are a part of the cross-sectional shapes of the air holes in the first group of air holes.   
     
     
         7 . The aerosol generating substrate of  claim 2 , wherein all air holes in the first group of air holes comprise a plurality of air hole units,
 wherein the plurality of air holes of the air hole units are arranged along a first direction,   wherein the plurality of the air hole units are arranged along a second direction, and   wherein the first direction intersects the second direction.   
     
     
         8 . The aerosol generating substrate of  claim 7 , wherein the plurality of air holes of the air hole units are linearly arranged along the first direction, and
 wherein the plurality of air hole units are linearly arranged along the second direction.   
     
     
         9 . The aerosol generating substrate of  claim 7 , wherein the plurality of air holes of the air hole units are circumferentially arranged along the first direction, and
 wherein the plurality of air hole units are sleeved one by one along the second direction.   
     
     
         10 . The aerosol generating substrate of  claim 1 , wherein a cross-sectional shape of at least one air hole of the plurality of air holes comprises a first shape, and
 wherein a cross-sectional shape of at least one air hole of the plurality of air holes comprises a second shape.   
     
     
         11 . The aerosol generating substrate of  claim 10 , wherein a part of the first shape is the same as the second shape. 
     
     
         12 . The aerosol generating substrate of  claim 10 , wherein a quantity of air holes of the first shapes is more than one,
 wherein a quantity of air holes of the second shapes is more than one, and   wherein each air hole of the second shape is surrounded by at least two air holes of the first shapes.   
     
     
         13 . The aerosol generating substrate of  claim 10 , wherein 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,
 wherein all air holes of the first shapes are grouped into a plurality of first row groups,   wherein 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,   wherein all the air holes of the second shapes are grouped into a plurality of second row groups,   wherein 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,   wherein 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   wherein the air holes of the first shapes and the air holes of the second shapes are alternately arranged in sequence in the second direction.   
     
     
         14 . The aerosol generating substrate of  claim 10 , wherein an air hole of the plurality of air holes whose cross-sectional shape comprises a third shape is provided on a center line of the aerosol generating substrate. 
     
     
         15 . The aerosol generating substrate of  claim 14 , wherein a quantity of air holes of the first shapes is four,
 wherein a quantity of air holes of the second shapes is four,   wherein 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   wherein one air hole of the second shape is provided between two neighboring air holes of the first shapes.   
     
     
         16 . The aerosol generating substrate of  claim 1 , wherein at least one of a hydraulic diameter of each of the air holes of the plurality of air holes ranges from 0.05 mm and 6 mm, and a cross-sectional area of each of the air holes of the plurality of air holes ranges from 0.0019 mm 2  to 30 mm 2 . 
     
     
         17 . The aerosol generating substrate of  claim 1 , wherein a cross-sectional shape of the aerosol generating substrate comprises the circle. 
     
     
         18 . The aerosol generating substrate of  claim 1 , wherein the aerosol generating substrate has a plurality of micropores, and
 wherein the plurality of micropores are in communication with the air holes.   
     
     
         19 . The aerosol generating substrate of  claim 1 , wherein the aerosol generating substrate comprises a groove provided on a peripheral surface of the aerosol generating substrate, and
 wherein the groove runs through at least one end of the aerosol generating substrate along the length direction.   
     
     
         20 . An aerosol generating article, comprising:
 the aerosol generating substrate of  claim 1 ;   a functional segment disposed at one end of the aerosol generating substrate along the length direction, the functional segment comprising 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.   
     
     
         21 . The aerosol generating article of  claim 20 , wherein the functional segment comprises a cooling segment located between the filter segment and the aerosol generating substrate.