Aerosol-generating system

Abstract

The utility model discloses an aerosol generating system which comprises an aerosol generating device and an aerosol generating product, the aerosol generating device comprises a shell and a heating body, the heating body comprises a first heating part and a second heating part, and the first heating part and the second heating part are at least partially arranged at intervals; a heating cavity is defined by the first heating part, and the aerosol generating product can be arranged in the heating cavity; air outside the shell is communicated with the heating cavity through an air inlet channel, the second heating part is arranged on the air inlet channel, and air flowing through the air inlet channel and before entering the heating cavity is preheated by the second heating part on the air inlet channel and then enters the heating cavity; the aerosol generating product comprises a substrate section, the substrate section comprises a first part and a second part, the porosity of the first part is larger than that of the second part, preheated air can make full contact with the first part of the substrate section, the temperature difference between the first part and the second part of the substrate section is reduced, and therefore the taste consistency of aerosol is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol generation, in particular to an aerosol generating system. Background Art

[0002] Existing heat-not-burn aerosol-generating devices typically include a heating element and an aerosol-generating substrate. The heating element can be inserted into the aerosol-generating substrate or positioned outside the substrate. When powered, the heating element generates heat that heats the aerosol-generating substrate. However, depending on the location of the heating element, the distance between the heating element and different regions of the aerosol-generating substrate varies. Typically, the temperature difference between different regions of the aerosol-generating substrate is significant, with regions closer to the heating element having higher temperatures and regions further away from the heating element having lower temperatures. This results in an inconsistent taste of the generated aerosol. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide an improved aerosol generating system.

[0004] The technical solution adopted by the present invention to solve the technical problem is as follows: providing an aerosol generating system, which includes an aerosol generating device and an aerosol generating product, wherein the aerosol generating device includes a housing and a heating element, wherein the housing defines a receiving space, and the heating element is disposed in the receiving space;

[0005] The heating element includes a first heating portion and a second heating portion, wherein the first heating portion and the second heating portion are at least partially spaced apart from each other; the first heating portion defines a heating cavity, and the aerosol-generating article can be disposed in the heating cavity;

[0006] An air inlet passage is provided in the receiving space, the air outside the housing is connected to the heating chamber through the air inlet passage, and the second heating part is provided on the air inlet passage;

[0007] The aerosol-generating article comprises a substrate segment capable of generating an aerosol when heated, wherein the substrate segment comprises a first portion and a second portion extending from one end to the other end along the axial direction thereof, wherein the porosity of the first portion is greater than the porosity of the second portion.

[0008] In some embodiments, the aerosol generating device further includes a heat insulating member, which is disposed in a gap between the first heating portion and the second heating portion and is connected to the first heating portion and the second heating portion, respectively.

[0009] In some embodiments, the first heating portion is a cylindrical structure, and the first heating portion encloses the heating chamber; the second heating portion is a cylindrical structure, a sheet structure, or a needle structure.

[0010] In some embodiments, at least one of the first heat-generating portion and the second heat-generating portion includes a heat-generating base and an infrared radiation layer disposed on the heat-generating base.

[0011] In some embodiments, the aerosol generating device also includes a shell, the shell includes a side wall, a first end wall, a second end wall, and an air inlet pipe; the side wall is connected between the first end wall and the second end wall, and the side wall, the first end wall and the second end wall together enclose a first cavity, and the first heating part is arranged in the first cavity; the shell is provided with an air inlet, one end of the air inlet pipe is connected to the air inlet, and the other end is connected to the second end wall and connected to the first cavity, and the air inlet pipe defines at least part of the air inlet channel.

[0012] In some embodiments, the gap between the first heating portion and the second end wall defines a second cavity, and the space enclosed by the air intake pipe and the second cavity together form the air intake channel; or, the first heating portion is located between the first end wall and the second end wall, the space enclosed by the air intake pipe forms the entire air intake channel, and the second heating portion is arranged in the space enclosed by the air intake pipe.

[0013] In some embodiments, the aerosol generating device also includes a shell, which includes a side wall, a first end wall, a second end wall, an air outlet pipe and a cylindrical cover body; the side wall is connected between the first end wall and the second end wall, and the side wall, the first end wall and the second end wall together enclose a first cavity, the cover body and the heating element are arranged in the first cavity, the cover body is located at the periphery of the heating element, and the gap between the first heating part and the second end wall defines the second cavity; the air outlet pipe is connected to the first end wall, and the first end wall is provided with an air inlet hole; a first gap is formed between the outer wall surface of the air outlet pipe and the inner wall surface of the outer shell, and a second gap is formed between the outer wall surface of the cover body and the inner wall surface of the side wall, and the first gap, the air inlet hole, the second gap and the second cavity are connected in sequence to jointly define the air inlet channel.

[0014] In some embodiments, the second portion is disposed on the periphery of the first portion.

[0015] In some embodiments, the matrix segment includes an air inlet end and an air outlet end arranged opposite to each other, and the first part is provided with a porous structure, which extends from the end surface of the air inlet end to the air outlet end, and the porous structure passes through or does not pass through the end surface of the air outlet end.

[0016] In some embodiments, the porous structure includes at least one first hole, the cross-sectional area of ​​which is equal everywhere along the direction from the air inlet end to the air outlet end; and / or, the porous structure includes at least one second hole, the cross-sectional area of ​​which gradually decreases along the direction from the air inlet end to the air outlet end.

[0017] The present invention has at least the following beneficial effects: since the first heating part and the second heating part are at least partially spaced apart, and the second heating part is arranged on the air inlet channel, the air flowing through the air inlet channel and before entering the heating chamber is preheated by the second heating part on the air inlet channel before entering the heating chamber, and the preheated air enters the matrix segment from the bottom of the matrix segment. Since the porosity of the first part of the matrix segment is greater than the porosity of the second part, the preheated air can fully contact the first part of the matrix segment, reducing the temperature difference between the first part and the second part of the matrix segment, thereby improving the taste consistency of the aerosol. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 1 is a schematic diagram of a vertical cross-sectional structure of an aerosol generating system according to a first embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A schematic vertical cross-sectional view of the aerosol generating article and the aerosol generating device of the aerosol generating system shown in FIG.

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the heating element in some embodiments of the present invention;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the heating element of other embodiments of the present utility model;

[0023] Figure 5 yes Figure 1 Schematic diagram of the partial structure of the aerosol generating system shown;

[0024] Figure 6 1 is a partial structural diagram of an aerosol generating system according to a second embodiment of the present invention;

[0025] Figure 7 is a partial structural diagram of an aerosol generating system in an embodiment in which the heating element is a sheet-like structure;

[0026] Figure 8 yes Figure 7 Schematic diagram of the three-dimensional structure of the heating element;

[0027] Figure 9 1 is a partial structural diagram of an aerosol generating system according to a third embodiment of the present invention;

[0028] Figure 10 yes Figure 9 A schematic diagram of a partial structure of an aerosol generating device is shown;

[0029] Figure 11 Schematic diagram of the three-dimensional structure of the aerosol generating article of some embodiments of the present invention;

[0030] Figure 12 1 is a schematic diagram of a vertical cross-sectional structure of an aerosol generating article according to some embodiments of the present invention;

[0031] Figure 13 Schematic diagram of the vertical cross-sectional structure of aerosol generating products according to other embodiments of the present invention. DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0033] like Figures 1 to 4 As shown, an aerosol generating system according to an embodiment of the present invention includes an aerosol generating device 1 and an aerosol generating article 2. The aerosol generating device 1 includes a housing 10 and a heating element 11. The housing 10 defines a receiving space, and the heating element 11 is disposed in the receiving space. Figure 3 As shown, the heating element 11 includes a first heating portion 111 and a second heating portion 112. The first heating portion 111 defines a heating cavity 110, and the aerosol generating article 2 can be disposed in the heating cavity 110. Specifically, as Figure 1 and Figure 2 In the illustrated embodiment, the aerosol-generating device 1 further includes a battery 12 disposed within the housing. The battery 12 is located below the heating element 11 and is connected to the heating element 11 for powering the heating element 11. The aerosol-generating article 2 is removably disposed within the heating chamber 110. The aerosol-generating article 2 includes a substrate segment 20 that generates aerosol when heated. When the aerosol-generating article 2 is placed within the heating chamber 110, the first heating portion 111 is positioned around the substrate segment 20. When the heating element 11 is powered, the first heating portion 111 generates heat that atomizes the substrate segment 20, producing aerosol for inhalation by the user.

[0034] The first heating portion 111 and the second heating portion 112 are at least partially spaced apart, that is, there is a hollow structure between the first heating portion 111 and the second heating portion 112, thereby reducing the heat transferred from the first heating portion 111 to the second heating portion 112 and reducing the energy consumption of the first heating portion 111. The first heating portion 111 and the second heating portion 112 can be an integrated structure, assembled as a whole; or the first heating portion 111 and the second heating portion 112 can be a split structure, and the first heating portion 111 and the second heating portion 112 of the split structure can be indirectly connected together through other components, or the two can be unconnected.

[0035] The aerosol generating product 2 may be a disposable consumable product. The used aerosol generating product 2 may be taken out from the heating chamber 110 and replaced with a new aerosol generating product 2. Figure 2 As shown, in some embodiments, the aerosol generating article 2 further comprises a connecting piece 25 and at least one functional segment. The functional segment is connected to the matrix segment 20, and the connecting piece 25 surrounds the functional segment and the matrix segment 20 to form a whole. Specifically, the functional segment comprises at least one of a filtering segment 23, a hollow segment 22, a cooling segment 21, and a blocking segment 24. Figure 2 In the illustrated embodiment, the filter section 23, hollow section 22, cooling section 21, matrix section 20, and plugging section 24 are sequentially connected. A connecting piece 25 is disposed around the filter section 23, hollow section 22, cooling section 21, matrix section 20, and plugging section 24, enclosing the filter section 23, hollow section 22, cooling section 21, matrix section 20, and plugging section 24 to form a single unit. The end of the filter section 23 facing away from the hollow section 22 serves as the inhalation end for inhalation by the user. The aerosol-generating article 2 is detachably disposed within the receiving space formed by the housing 10. When the aerosol-generating article 2 is placed within the receiving space, the matrix section 20 is positioned within the heating chamber 110. A used aerosol-generating article 2 can be removed from the receiving space and replaced with a new one.

[0036] An air inlet channel 15 is provided in the receiving space, and the air outside the shell 10 and the heating chamber 110 are connected through the air inlet channel 15. That is, the air inlet channel 15 is connected to the external air of the shell 10 and the heating chamber 110 respectively. The air outside the shell 10 will enter the air inlet channel 15 under the suction force of the user and mix with the aerosol in the heating chamber 110. The mixture of aerosol and air flows through the blocking section 24, the matrix section 20, the cooling section 21, the hollow section 22 and the filtering section 23 from bottom to top, and is finally inhaled by the user at the inhalation end. Alternatively, in other embodiments, the aerosol generating product 2 may not be provided with the blocking section 24, and the preheated air directly enters the matrix section 20 from bottom to top.

[0037] The second heating portion 112 is disposed on the air inlet passage 15. For example, the second heating portion 112 can be disposed within the air inlet passage 15 or near the periphery of the air inlet passage 15. The second heating portion 112 is primarily used to heat the air flowing through the air inlet passage 15 before entering the heating chamber 110. Alternatively, the second heating portion 112 can be disposed on the periphery of the blocking section 24 to heat the blocking section 24, thereby heating the air flowing through the blocking section 24. Thus, the air flowing through the air inlet passage 15 before entering the heating chamber 110 is preheated by the second heating portion 112 within the air inlet passage 15 before entering the heating chamber 110.

[0038] like Figure 11 As shown, the matrix segment 20 includes a first portion 2031 and a second portion 2032 extending axially from one end to the other. The first portion 2031 is further away from the first heat-generating portion 111 than the second portion 2032. The porosity of the first portion 2031 is greater than that of the second portion 2032. Therefore, when the preheated air enters the matrix segment 20, it can fully contact the first portion 2031, thereby increasing the temperature of the first portion 2031 and reducing the temperature difference between the first portion 2031 and the second portion 2032.

[0039] For example, Figures 1 to 4 In the embodiment shown, when the aerosol-generating article 2 is placed in the heating chamber 110, the first heating portion 111 is located at the periphery of the substrate segment 20. This heating method is circumferential heating, so that the temperature of the outer edge area of ​​the substrate segment 20 is higher than the temperature of the central area. Figure 11 In the illustrated embodiment, the second portion 2032 may be located outside the first portion 2031. That is, the first portion 2031 is closer to the central axis Y of the matrix segment 20 than the second portion 2032. In other words, the porosity of the central region (first portion 2031) of the matrix segment 20 is greater than the porosity of the peripheral portion (second portion 2032). Thus, preheated air can fully contact the central region of the matrix segment 20, thereby increasing the temperature of the central region of the matrix segment 20 and reducing the temperature difference between the central region and the outer edge region of the matrix segment 20.

[0040] Alternatively, the first portion 2031 and the second portion 2032 may have other positional relationships. For example, in some other embodiments, the heating element (not shown) is in the form of a sheet or needle, and the heating element is inserted into the central area of ​​the matrix segment 20. This heating method is central heating, so that the temperature of the central area of ​​the matrix segment 20 is higher than that of the outer edge area. In this case, the first portion 2031 is arranged on the periphery of the second portion 2032, that is, the porosity of the outer edge area of ​​the matrix segment 20 is greater than that of its central area. Therefore, the preheated air can fully contact the outer edge area of ​​the matrix segment 20, thereby increasing the temperature of the outer edge area of ​​the matrix segment 20 and reducing the temperature difference between the central area and the outer edge area of ​​the matrix segment 20.

[0041] To sum up, when the preheated air enters the matrix segment 20 from the bottom of the matrix segment 20, since the porosity of the first part 2031 is greater than the porosity of the second part 2032, the preheated air can fully contact the first part 2031 of the matrix segment 20 (for example, it can be the central area), thereby increasing the temperature of the first part 2031 and reducing the temperature difference between the first part 2031 and the second part 2032 of the matrix segment 20 (for example, the temperature of the peripheral edge part and the temperature of the central part), thereby improving the taste consistency of the aerosol.

[0042] like Figure 3 As shown, in some embodiments, the first heating portion 111 and the second heating portion 112 are partially connected, and a gap is formed between the other parts of the first heating portion 111 and the second heating portion 112. Figure 4 As shown, in some other embodiments, the first heating portion 111 and the second heating portion 112 are completely spaced apart. Figure 3 and Figure 4In the illustrated embodiment, at least one of the first heating element 111 and the second heating element 112 includes a heating substrate 113 and an infrared radiation layer 114 disposed on the heating substrate 113. Specifically, only the first heating element 111 may include the heating substrate 113 and the infrared radiation layer 114 disposed on the heating substrate 113; only the second heating element 112 may include the heating substrate 113 and the infrared radiation layer 114 disposed on the heating substrate 113; or both the first heating element 111 and the second heating element 112 may include the heating substrate 113 and the infrared radiation layer 114 disposed on the heating substrate 113. The infrared radiation layer 114 may be disposed on the outer or inner surface of the heating substrate 113. The heating substrate 113 may be a ceramic substrate or a quartz substrate. When energized, the heating substrate 113 generates heat, which is transferred to the infrared radiation layer 114 on its surface. The heated infrared radiation layer 114 generates infrared rays, thereby heating the substrate segment 20 within the heating chamber 110. The heating element 11 also includes at least two electrode leads 116, each of which is connected to the heating base 113 and the battery 12, respectively, and serves as a conductive medium between the heating base 113 and the battery 12. A heating film 115 and a conductive film can also be provided on the surface of the infrared radiation layer 114. The heating principle is as follows: after the heating base 113 is energized, the heating film 115 generates heat under the action of the current, and the heat is transferred to the infrared radiation layer 114. The infrared radiation layer 114 generates infrared radiation, and the infrared radiation passes through the heating base 113 and is absorbed by the matrix segment 20, thereby heating the matrix segment 20. In addition, the heating film 115 will also transfer heat to the heating base 113, and then transfer the heat to the matrix segment 20 through the heating base 113. The heating film 115 on the first heating part 111 and the heating film 115 on the second heating part 112 may be connected or not connected. When the heating film 115 on the first heating part 111 and the heating film 115 on the second heating part 112 are not connected, the power on and off of the heating film 115 on the first heating part 111 and the power on and off of the heating film 115 on the second heating part 112 can be controlled respectively by their respective electrode leads 116.

[0043] Furthermore, in some embodiments, the aerosol generating device 1 further includes a heat insulating member (not shown), which is disposed in the gap between the first heating portion 111 and the second heating portion 112 and is in contact with the first heating portion 111 and the second heating portion 112, respectively. The provision of the heat insulating member can further reduce the amount of heat transferred from the first heating portion 111 to the second heating portion 112. The heat insulating member can be made of a material with low thermal conductivity, for example, one or more of glass, rubber, and plastic.

[0044] like Figure 3 and Figure 4As shown, in some embodiments, the first heating portion 111 is a cylindrical structure, and the cylindrical first heating portion 111 encloses the heating chamber 110. The second heating portion 112 is also a cylindrical structure. However, in other embodiments, the second heating portion 112 may also be a sheet structure (see Figure 8 The second heating portion 112 of the needle-like structure can be at least partially inserted into the blocking section 24.

[0045] There may be many different embodiments for the specific path of the air intake passage 15 . Three embodiments are provided below for reference. However, the specific path of the air intake passage 15 is not limited to the following embodiments and may also be in other forms.

[0046] like Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, in the first embodiment of the air inlet channel 15, the aerosol generating device 1 further includes a shell 13, and the shell 13 includes a side wall 130, a first end wall 131, a second end wall 132, and an air inlet pipe 133. The second end wall 132 is closer to the air outlet end 202 of the air inlet channel 15 than the first end wall 131. The side wall 130 is connected between the first end wall 131 and the second end wall 132, and the side wall 130, the first end wall 131 and the second end wall 132 together enclose a first cavity. The first heating portion 111 is arranged in the first cavity. The air inlet pipe 133 is roughly L-shaped. An air inlet 101 is provided on the side of the shell 10, and one end of the air inlet pipe 133 is connected to the air inlet 101, and the other end is connected to the second end wall 132 and connected to the first cavity. The air inlet pipe 133 defines at least part of the air inlet channel 15. That is, in different embodiments, the air inlet pipe 133 may define a portion of the air inlet channel 15, or the air inlet pipe 133 alone may define the entire air inlet channel 15. The second heating portion 112 may be disposed within the first cavity, or within the space enclosed by the air inlet pipe 133. Specifically:

[0047] like Figure 5 As shown, in the first embodiment, the space enclosed by the air inlet pipe 133 and the second cavity 16 together form the air inlet channel 15. The dotted line with an arrow in the figure illustrates the range of the air inlet channel 15. The second heating portion 112 is arranged in the first cavity and is located between the first heating portion 111 and the second end wall 132. Specifically, the external air enters the air inlet channel 15 through the air inlet 101 of the outer shell 10, and is preheated after passing through the space enclosed by the cylindrical second heating element 11 in the air inlet channel 15. The preheated air enters the inner center area of ​​the matrix segment 20 from the bottom of the matrix segment 20 in the upper heating cavity 110.

[0048] like Figure 6As shown, in the second embodiment of the air intake channel 15, unlike the first embodiment, the cylindrical first heating portion 111 is located between the first end wall 131 and the second end wall 132, and its upper end surface can abut against the first end wall 131, and its lower end surface can abut against the second end wall 132. The space enclosed by the air intake pipe 133 forms the entire air intake channel 15, that is, the air intake pipe 133 alone defines the entire air intake channel 15. The dotted line with an arrow in the figure illustrates the range of the air intake channel 15. The second heating portion 112 is arranged in the space enclosed by the air intake pipe 133.

[0049] Specifically, if Figure 7 and Figure 8 In the illustrated embodiment, the second heating portion 112 is a sheet-like structure, and a heating film 115 is formed on the second heating portion 112 by printing or other methods. The second heating portion 112 and the first heating portion 111 are split structures, and the two are completely spaced apart and not connected. The second heating portion 112 of the sheet-like structure is separately arranged in the space enclosed by the air intake pipe 133. The second heating portion 112 arranged in the space enclosed by the air intake pipe 133 can heat the air flowing through the air intake pipe 133, and the preheated air flowing through the air intake pipe 133 then flows upward to the heating chamber 110 and contacts the matrix segment 20.

[0050] Specifically, in Figure 5 and Figure 6 In the illustrated embodiment, the first heating portion 111 and the second heating portion 112 may be partially connected and spaced apart from each other; or, the first heating portion 111 and the second heating portion 112 may be completely spaced apart from each other.

[0051] like Figure 5 、 Figure 6 、 Figure 9 and Figure 10 As shown, in some embodiments, the housing 13 further includes an air outlet pipe 134. The air outlet pipe 134 is connected to the first end wall 131. The end (upper end) of the air outlet pipe 134, which is distal to the first end wall 131, is in direct communication with the air outside the receiving space. The aerosol-generating article 2 is inserted downwardly into the first cavity from the upper end of the air outlet pipe 134, such that the substrate segment 20 is positioned precisely within the heating chamber 110. Figure 5 In the illustrated embodiment, when the aerosol generating article 2 is inserted into the first cavity, the second heating portion 112 can be arranged just outside the blocking section 24 , and the second heating portion 112 heats the blocking section 24 , thereby heating the air flowing through the blocking section 24 .

[0052] like Figure 9 and Figure 10 As shown, in the third embodiment of the air intake passage 15, Figures 1 to 7Unlike the illustrated embodiment, the housing 13 further includes a cylindrical cover 14. The cover 14 and the heating element 11 are disposed within the first cavity, with the cover 14 positioned around the heating element 11. A second cavity 16 is defined by a first heating portion 111 and a second end wall 132 spaced apart from each other. Specifically, the upper end surface of the first heating portion 111 abuts the first end wall 131, while the lower end surface of the first heating portion 111 is spaced apart from the second end wall 132. An air outlet pipe 134 is connected to the first end wall 131, which is provided with an air inlet hole 1310. A first gap 171 is formed between the outer wall of the air outlet pipe 134 and the inner wall of the housing 10, while a second gap 172 is formed between the outer wall of the cover 14 and the inner wall of the side wall 130. The first gap 171, the air inlet hole 1310, the second gap 172, and the second cavity 16 are sequentially connected to define an air inlet passage 15.

[0053] Specifically, in some embodiments, a third gap (not shown) is formed between the end of the cover body 14 and the second end wall 132. The second gap 172 and the second cavity 16 are connected via the third gap. Alternatively, in other embodiments, a through hole (not shown) is formed in the sidewall of the cover body 14, extending through the outer and inner sidewalls thereof, and the second gap 172 and the second cavity 16 are connected via the through hole.

[0054] like Figure 9 and Figure 10 In the embodiment shown, the second heating portion 112 is a cylindrical structure and is disposed in the second cavity 16. However, in other embodiments, the second heating portion 112 may also be a sheet-like structure, a needle-like structure, or other structures, and may also be disposed at any position in the first gap 171, the air inlet 1310, the second gap 172, and the third gap. The second heating portion 112 only needs to be disposed in the air inlet channel 15 to preheat the air before entering the heating cavity 110. Figure 11As shown, in some embodiments, the matrix segment 20 includes an air inlet end 201 and an air outlet end 202 disposed opposite each other, with the air inlet end 201 being connected to the blocking segment 24. Alternatively, in some aerosol-generating articles 2 without the blocking segment 24, the air inlet end 201 may directly contact the second end wall 132. The air outlet end 202 is connected to the cooling segment 21. The first portion 2031 of the matrix segment 20 is provided with a porous structure, which extends from the end surface of the air inlet end 201 to the air outlet end 202. The porous structure may or may not penetrate the end surface of the air outlet end 202. Preferably, the porous structure does not penetrate the end surface of the air outlet end 202, that is, the porous structure is not connected to the cooling segment 21. This ensures that air flowing through the porous structure is in sufficient contact with the matrix segment 20, thereby generating more aerosol. The porous structure makes the porosity of the first portion 2031 greater than that of the second portion 2032. When the second part 2032 is arranged on the periphery of the first part 2031, after the porous structure is set, the preheated hot air can be guided to the central area inside the matrix segment 20 through the porous structure, and the central area inside the matrix segment 20 is preheated in advance, thereby reducing the temperature difference between the peripheral edge part and the central part of the matrix segment 20, thereby ensuring the consistency of the taste of the generated aerosol.

[0055] like Figure 11 As shown, in some embodiments, the first portion 2031 is provided with a plurality of through holes, and the first portion 2031 is located at the center of the matrix segment 20 .

[0056] like Figure 12 As shown, in some embodiments, the porous structure includes at least one first hole 2033, and the cross-sectional area of ​​the first hole 2033 is uniform along the direction from the air inlet end 201 to the air outlet end 202. That is, the cross-sectional area of ​​at least one hole in the porous structure is uniform along the direction from the air inlet end 201 to the air outlet end 202. The transverse direction of the "cross-sectional area" refers to the direction perpendicular to the central axis Y of the aerosol-generating substrate 20.

[0057] like Figure 13 As shown, in some embodiments, the porous structure includes at least one second hole 2034, the cross-sectional area of ​​which gradually decreases from the air inlet end 201 to the air outlet end 202. That is, the cross-sectional area of ​​at least one hole in the porous structure gradually decreases from the air inlet end 201 to the air outlet end 202. As a result, hot air near the air inlet end 201 can more easily enter the inner central area of ​​the matrix segment 20. Furthermore, because the space for accommodating hot air gradually decreases as one approaches the air outlet end 202, the hot air can fully contact the matrix segment 20, thereby facilitating the discharge of a sufficient amount of aerosol.

[0058] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. An aerosol generating system, characterized in that The invention comprises an aerosol generating device (1) and an aerosol generating article (2), wherein the aerosol generating device (1) comprises a housing (10) and a heating element (11), wherein the housing (10) defines a receiving space, and the heating element (11) is arranged in the receiving space; The heating element (11) comprises a first heating portion (111) and a second heating portion (112), wherein the first heating portion (111) and the second heating portion (112) are at least partially spaced apart from each other; the first heating portion (111) defines a heating cavity (110), and the aerosol generating article (2) can be disposed in the heating cavity (110); An air inlet channel (15) is provided in the receiving space, and the air outside the housing (10) and the heating chamber (110) are connected through the air inlet channel (15), and the second heating portion (112) is provided on the air inlet channel (15); The aerosol-generating article (2) comprises a substrate segment (20) capable of generating an aerosol when heated, wherein the substrate segment (20) comprises a first portion (2031) and a second portion (2032) both extending from one end to the other end along the axial direction thereof, wherein the porosity of the first portion (2031) is greater than the porosity of the second portion (2032).

2. The aerosol generating system according to claim 1, wherein: The aerosol generating device (1) further comprises a heat insulating member, which is arranged in the interval between the first heating portion (111) and the second heating portion (112) and is connected to the first heating portion (111) and the second heating portion (112) respectively.

3. The aerosol generating system according to claim 1, wherein: The first heating portion (111) is a cylindrical structure, and the first heating portion (111) encloses and forms the heating chamber (110); the second heating portion (112) is a cylindrical structure, a sheet structure, or a needle structure.

4. The aerosol generating system according to claim 1, wherein: At least one of the first heat-generating portion (111) and the second heat-generating portion (112) includes a heat-generating base (113) and an infrared radiation layer (114) disposed on the heat-generating base (113).

5. The aerosol generating system according to claim 1, wherein: The aerosol generating device (1) further comprises a housing (13), wherein the housing (13) comprises a side wall (130), a first end wall (131), a second end wall (132), and an air inlet pipe (133); The side wall (130) is connected between the first end wall (131) and the second end wall (132); the side wall (130), the first end wall (131) and the second end wall (132) together enclose a first cavity; the first heating portion (111) is disposed in the first cavity; The housing (10) is provided with an air inlet (101), one end of the air inlet pipe (133) is connected to the air inlet (101), and the other end is connected to the second end wall (132) and connected to the first cavity, and the air inlet pipe (133) defines at least a portion of the air inlet channel (15).

6. The aerosol generating system according to claim 5, wherein: The interval between the first heating portion (111) and the second end wall (132) defines a second cavity (16), and the space enclosed by the air intake pipe (133) and the second cavity (16) together form the air intake channel (15); Alternatively, the first heating portion (111) is located between the first end wall (131) and the second end wall (132), the space enclosed by the air intake pipe (133) forms the entire air intake channel (15), and the second heating portion (112) is arranged in the space enclosed by the air intake pipe (133).

7. The aerosol generating system according to claim 1, wherein: The aerosol generating device (1) further comprises a housing (13), wherein the housing (13) comprises a side wall (130), a first end wall (131), a second end wall (132), an air outlet pipe (134) and a cylindrical cover (14); The side wall (130) is connected between the first end wall (131) and the second end wall (132); the side wall (130), the first end wall (131) and the second end wall (132) together enclose a first cavity; the cover (14) and the heating element (11) are arranged in the first cavity; the cover (14) is located on the periphery of the heating element (11); and the interval between the first heating portion (111) and the second end wall (132) defines a second cavity (16); The air outlet pipe (134) is connected to the first end wall (131), and the first end wall (131) is provided with an air inlet hole (1310); A first gap (171) is formed between the outer wall surface of the air outlet pipe (134) and the inner wall surface of the shell (10), and a second gap (172) is formed between the outer wall surface of the cover body (14) and the inner wall surface of the side wall (130). The first gap (171), the air inlet hole (1310), the second gap (172) and the second cavity (16) are connected in sequence to define the air inlet channel (15).

8. An aerosol generating system according to any one of claims 1 to 7, characterized in that The second portion (2032) is arranged on the periphery of the first portion (2031).

9. An aerosol generating system according to any one of claims 1 to 7, characterized in that The matrix segment (20) includes an air inlet end (201) and an air outlet end (202) that are arranged opposite to each other, and the first portion (2031) is provided with a porous structure, and the porous structure extends from the end surface of the air inlet end (201) to the air outlet end (202), and the porous structure passes through or does not pass through the end surface of the air outlet end (202).

10. An aerosol generating system according to claim 9, characterized in that The porous structure comprises at least one first hole (2033), wherein the cross-sectional area of ​​the first hole (2033) is equal everywhere along the direction from the air inlet end (201) to the air outlet end (202); And / or, the porous structure includes at least one second hole (2034), and the cross-sectional area of ​​the second hole (2034) gradually decreases along the direction from the air inlet end (201) to the air outlet end (202).

Images