Heating assembly and aerosol-generating device

Abstract

A heating assembly and an aerosol-generating device are provided. The heating assembly includes a heating body (10), the heating body is internally provided with an accommodating cavity (11), and the accommodating cavity accommodates at least two types of aerosol substrates with substrate segments at different axial positions. The accommodating cavity is provided with an insertion port (111), and the insertion port is configured to insert the aerosol substrate into the accommodating cavity. The heating body is provided with separation structures (12) and at least three heating structures (13); the at least three heating structures are sequentially arranged in an axial direction of the accommodating cavity, a separation structure is disposed between every two adjacent heating structures, and the separation structure blocks heat transfer between the adjacent heating structures. Every two adjacent heating structures form a heating portion (14), and different heating portions are correspondingly arranged with substrate segments of different aerosol substrates. In the present disclosure, the same aerosol-generating device is compatible with multiple types of aerosol substrates.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of aerosol generation, and in particular to a heating assembly and an aerosol-generating device.BACKGROUND

[0002] An aerosol-generating device is a device capable of heating and atomizing an aerosol substrate to generate aerosol from the aerosol substrate. Typically, the aerosol-generating device employs a heating tube to heat the aerosol substrate, the heating tube is internally provided with a cylindrical heating cavity, an opening is formed at an end of the heating cavity, and the aerosol substrate may be inserted into the heating tube through the opening, such that the heating tube heats a substrate segment of the aerosol substrate.

[0003] Currently, aerosol substrates may vary in types. In addition to substrate segments, some aerosol substrates further include more functional segments, resulting in that substrate segments of aerosol substrates of different types have different positions. When different types of aerosol substrates are inserted into the heating tube, positions of the substrate segments relative to the heating structures on the heating tube are different, and some substrate segments cannot correspond to the heating structures on the heating tube, thus leading to poor heating effect. Therefore, generally, one aerosol-generating device is only compatible with one type of aerosol substrate, which fails to meet users' demand that one aerosol-generating device is compatible with multiple types of aerosol substrates.SUMMARY

[0004] The present disclosure provides a heating assembly and an aerosol-generating device, to solve the problem that the same aerosol-generating device is not compatible with multiple types of aerosol substrates.

[0005] In order to solve the above technical problem, the present disclosure provides a heating assembly, and the heating assembly includes a heating body, where the heating body is internally provided with an accommodating cavity, and the accommodating cavity is configured to respectively accommodate at least two types of aerosol substrates with substrate segments at different axial positions; an end of the accommodating cavity is provided with an insertion port, and the insertion port is configured to insert the aerosol substrate into the accommodating cavity; and the heating body is provided with separation structures and at least three heating structures, the at least three heating structures are sequentially arranged in an axial direction of the accommodating cavity, a separation structure is disposed between every two adjacent heating structures, and the separation structure is configured to block heat transfer between the adjacent heating structures; and every two adjacent heating structures form a heating portion, and different heating portions are configured to be correspondingly arranged with substrate segments of different aerosol substrates.

[0006] In an embodiment, the heating body is at least provided with a first heating structure, a second heating structure, and a third heating structure, where the first heating structure, the second heating structure, and the third heating structure are sequentially arranged from a position away from the insertion port to a position close to the insertion port; and a total thermal resistance of all the separation structures between the first heating structure and the second heating structure is greater than a total thermal resistance of all the separation structures between the second heating structure and the third heating structure.

[0007] In an embodiment, the number of the separation structures between the first heating structure and the second heating structure is greater than number of the separation structures between the second heating structure and the third heating structure.

[0008] In an embodiment, each of the separation structures is shaped like a hole, protrusion, or recess.

[0009] In an embodiment, the heating body further includes heat insulators, and the heat insulators are embedded in the separation structures.

[0010] In an embodiment, the heating assembly further includes a porous member, where the porous member is provided with a plurality of heating channels penetrating through the porous member; the porous member is installed at an end of the accommodating cavity away from the insertion port; and the first heating structure is arranged on an outer periphery of the porous member to heat an airflow in the heating channels into a hot airflow, and the hot airflow is configured to flow into the aerosol substrate and heat the aerosol substrate.

[0011] In an embodiment, the heating assembly further includes a first aerosol substrate and a second aerosol substrate, where the first aerosol substrate includes a first substrate segment, when the first aerosol substrate is inserted into the accommodating cavity, the first substrate segment abuts against the porous member, and the first heating structure and the second heating structure are configured to heat the first substrate segment; and the second aerosol substrate includes a second substrate segment and a porous segment, and when the second aerosol substrate is inserted into the accommodating cavity, the porous segment abuts against the porous member, and the second substrate segment is connected to an end of the porous segment facing the insertion port; and the second heating structure and the third heating structure are configured to heat the second substrate segment.

[0012] In an embodiment, the heating body is further provided with a first electrode, a second electrode, a third electrode, and a fourth electrode, where the first electrode and the second electrode are respectively connected to two ends of the first heating structure, the third electrode and the fourth electrode are respectively connected to two ends of the third heating structure, one end of the second heating structure is connected to the first electrode, and the other end of the second heating structure is connected to the third electrode.

[0013] In order to solve the above technical problem, the present disclosure further provides an aerosol-generating device, and the aerosol-generating device includes a bracket assembly and the heating assembly according to any one of the above embodiments, and the heating assembly is fixed on the bracket assembly.

[0014] In an embodiment, the bracket assembly includes a first bracket and a second bracket, the first bracket is internally provided with an installation cavity, and both the heating body and the second bracket are disposed in the installation cavity; and the second bracket supports an end of the heating body away from the insertion port, the first bracket abuts against an end of the heating body close to the insertion port, an air inlet channel is formed between a cavity wall of the installation cavity and the heating body, and the air inlet channel communicates with the accommodating cavity.

[0015] Since at least three heating structures are sequentially arranged on the heating body of the present disclosure in an axial direction, every two adjacent heating structures form a heating portion, and different heating portions with different axial heights may be configured to correspond to substrate segments at different axial heights, such that when different aerosol substrates are inserted, a substrate segment of each type of aerosol substrate is heated by a corresponding heating portion; and therefore, the same aerosol-generating device is compatible with multiple types of aerosol substrates. Additionally, the separation structures are arranged between the heating structures to prevent heat transfer between the heating structures, so as to improve heating efficiency.BRIEF DESCRIPTION OF DRAWINGS

[0016] FIG. 1 is a schematic structural diagram of a heating assembly provided in an embodiment of the present disclosure. FIG. 2 is a schematic diagram of an unfolded structure of a heating assembly provided in an embodiment of the present disclosure. FIG. 3 is a schematic structural diagram of a first aerosol substrate provided in an embodiment of the present disclosure. FIG. 4 is a schematic structural diagram of a second aerosol substrate provided in an embodiment of the present disclosure. FIG. 5 is a sectional view of a heating assembly provided in an embodiment of the present disclosure. FIG. 6 is a sectional view of an aerosol-generating device provided in an embodiment of the present disclosure. FIG. 7 is a sectional view of an aerosol-generating device provided in another embodiment of the present disclosure.

[0017] Reference numerals in the figures: 10-heating body; 11-accommodating cavity; 111-insertion port; 12-separation structure; 13-heating structure; 131-first heating structure; 132-second heating structure; 133-third heating structure; 14-heating portion; 141-first heating portion; 142-second heating portion; 15-first electrode; 16-second electrode; 17-third electrode; 18-fourth electrode; 20-first aerosol substrate; 21-first substrate segment; 22-first air channel segment; 23-first filter segment; 30-second aerosol substrate; 31-second substrate segment; 32-porous segment; 33-second air channel segment; 34-second filter segment; 40-porous member; 41-heating channel; 50-bracket assembly; 51-first bracket; 511-installation cavity; 512-air inlet channel; and 52-second bracket.DETAILED DESCRIPTION

[0018] The present disclosure will be further described in detail below with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are labeled with associated similar element labels. In the following embodiments, more details are described to facilitate clearer understanding of the present disclosure. However, those skilled in the art can readily recognize that some of the features can be omitted in different cases, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present disclosure are not shown or described in the specification, with the aim of preventing the important part of the present disclosure from being overwhelmed by excessive description, and for those skilled in the art, it is unnecessary to describe these related operations in detail, and they can gain a thorough understanding of the related operations according to the description in the specification and the general technical knowledge in the field.

[0019] In addition, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. Operation steps involved in each embodiment can also be sequentially exchanged or adjusted in a manner obvious to those skilled in the art. Therefore, the specification and drawings are merely for clear description of an embodiment, and are not intended to be a necessary composition and / or sequence.

[0020] The serial numbers assigned to the components herein, such as "first", "second", are only used to distinguish the described objects, and do not have any sequence or technical meaning. The terms "connection" and "coupling" mentioned herein include direct and indirect connection (coupling), unless otherwise specified.

[0021] The terms such as "parallel" and "vertical" are all defined relative to the current state of the art, rather than absolutely strict definitions in the mathematical sense, and slight deviations are allowed, that is, "approximately parallel" and "approximately vertical" are acceptable. For example, "A is parallel to B" means that A is parallel or approximately parallel to B, and an included angle between A and B may range from 0° to 10°. For example, "A is perpendicular to B" means that A is perpendicular or approximately perpendicular to B, and an included angle between A and B may range from 80° to 100°. The orientation terms mentioned in the present disclosure, such as "upper", "inner", "outer", "side", and the like, only indicate the directions in the accompanying drawings. Therefore, the orientation terms are used to better illustrate and understand the embodiments of the present disclosure, and are not intended to indicate or imply that the referenced device or element must have a particular orientation and be constructed and operative in a particular orientation, and thus may not be construed as a limitation on the embodiments of the present disclosure.

[0022] With reference to FIGS. 1 and 2, the present disclosure provides a heating assembly. The heating assembly is applied to an aerosol-generating device and is configured to heat an aerosol substrate to generate aerosol. The heating assembly includes a heating body 10, and the heating body 10 is internally provided with an accommodating cavity 11. Specifically, the heating body 10 has a tubular structure, and the tubular structure has openings at both ends in an axial direction thereof. An internal space of the tubular structure is the accommodating cavity 11. An end of the accommodating cavity 11 is provided with an insertion port 111, and the insertion port 111 is configured to insert the aerosol substrate into the accommodating cavity 11.

[0023] The accommodating cavity 11 is configured to respectively accommodate at least two types of aerosol substrates, and for example, as shown in FIGS. 3 and 4, different types of aerosol substrates have substrate segments at different axial positions. The substrate segment contains a solid grass-leaf substrate, such as a tobacco substrate, the tobacco substrate is heated to generate aerosol, and differences in axial positions of substrate segments mean that under the condition that bottom surface positions of the aerosol substrates are at a same height, heights of substrate segments in an axial direction of aerosol substrates are different. Different types of aerosol substrates have different functional segments, and addition of functional segments leads to differences in axial positions of substrate segments in aerosol substrates.

[0024] For example, the aerosol substrate in FIG. 3 is a first aerosol substrate 20, and the heating assembly may or may not include the first aerosol substrate 20. The first aerosol substrate 20 includes a first substrate segment 21, and the first aerosol substrate 20 further includes a first air channel segment 22 and a first filter segment 23, where the first substrate segment 21, the first air channel segment 22, and the first filter segment 23 are connected sequentially, that is, during inhalation, the user inhales the first filter segment 23, the first filter segment 23 is located at a topmost part of the first aerosol substrate 20, and the first substrate segment 21 is located at a bottommost part of the first aerosol substrate 20.

[0025] For example, the aerosol substrate in FIG. 4 is a second aerosol substrate 30, and the heating assembly may or may not include the second aerosol substrate 30. The second aerosol substrate 30 includes a second substrate segment 31 and a porous segment 32, and the second aerosol substrate 30 further includes a second air channel segment 33 and a second filter segment 34, where the porous segment 32, the second substrate segment 31, the second air channel segment 33, and the second filter segment 34 are connected sequentially, that is, during inhalation, the user inhales the second filter segment 34, the second filter segment 34 is located at a topmost part of the second aerosol substrate 30, and the porous segment 32 is located at a bottommost part of the second aerosol substrate 30.

[0026] Therefore, after the first aerosol substrate 20 and the second aerosol substrate 30 are respectively inserted into the accommodating cavity 11, under the condition that bottom surfaces of the first aerosol substrate 20 and the second aerosol substrate 30 are at a same axial height, an axial position of the first substrate segment 21 is farther away from the insertion port 111 than an axial position of the second substrate segment 31.

[0027] As shown in FIGS. 1 and 2, the heating body 10 is provided with separation structures 12 and at least three heating structures 13. The at least three heating structures 13 are sequentially arranged in an axial direction of the accommodating cavity 11, and "sequentially arranged" herein means that for two adjacent heating structures 13, a top end of the heating structure 13 on a side close to the insertion port 111 is higher than a top end of the heating structure 13 on a side away from the insertion port 111, and a bottom end of the heating structure 13 on the side close to the insertion port 111 is higher than a bottom end of the heating structure 13 on the side away from the insertion port 111.

[0028] For the two adjacent heating structures 13, the bottom end of the heating structure 13 on the side close to the insertion port 111 may be higher than the top end of the heating structure 13 on the side away from the insertion port 111. Alternatively, the bottom end of the heating structure 13 on the side close to the insertion port 111 may be flush with the top end of the heating structure 13 on the side away from the insertion port 111, or the bottom end of the heating structure 13 on the side close to the insertion port 111 may be lower than the top end of the heating structure 13 on the side away from the insertion port 111, that is, part of the adjacent heating structures 13 have a same axial height.

[0029] A separation structure 12 is disposed between every two adjacent heating structures 13, and the separation structure 12 is configured to block heat transfer between adjacent heating structures 13, such that heat of each of the heating structure 13 is transferred to the aerosol substrate radially inward to a greater extent, and transferred in an axial direction of the heating body 10 to a lesser extent, and heat at a location of each of the heating structures 13 is more independent.

[0030] Every two adjacent heating structures 13 form a heating portion 14, and different heating portions 14 are configured to be correspondingly arranged with substrate segments of different aerosol substrates. The number of the heating portions 14 is the same as the number of types of aerosol substrates adapted to the heating body 10. Corresponding arrangement of the heating portions 14 and the substrate segments means that different heating portions 14 have a same axial height as substrate segments of different aerosol substrates, and the heating portion 14 is roughly arranged around a periphery of a corresponding substrate segment.

[0031] Since at least three heating structures 13 are sequentially arranged on the heating body 10 of the present disclosure in an axial direction, every two adjacent heating structures 13 form a heating portion 14, and different heating portions 14 with different axial heights may be configured to correspond to substrate segments at different axial heights, such that when different aerosol substrates are inserted, a substrate segment of each type of aerosol substrate is heated by a corresponding heating portion 14; and therefore, the same aerosol-generating device is compatible with multiple types of aerosol substrates, and effects of heating substrate segments with different axial heights are good when different types of aerosol substrates are inserted. Additionally, the separation structures 12 are arranged between the heating structures 13 to prevent heat transfer between the heating structures 13, so as to improve heating efficiency.

[0032] Additionally, since each of the heating portions 14 has two heating structures 13, when one of the heating portions 14 heats a substrate segment, an upper half and a lower half of the substrate segment are heated at two different heating power levels respectively by adjusting heating power of the two heating structures 13, thereby enabling more modes of heating the substrate segment.

[0033] In an embodiment, as shown in FIGS. 1 and 2, the heating body 10 is at least provided with a first heating structure 131, a second heating structure 132, and a third heating structure 133, where the first heating structure 131, the second heating structure 132, and the third heating structure 133 are sequentially arranged from a position away from the insertion port 111 to a position close to the insertion port 111. The first heating structure 131 and the second heating structure 132 form a first heating portion 141, and the second heating structure 132 and the third heating structure 133 form a second heating portion 142. The first heating portion 141 and the second heating portion 142 are respectively configured to heat two different types of aerosol substrates (for example, respectively configured to heat the first aerosol substrate 20 and the second aerosol substrate 30).

[0034] A total thermal resistance of all the separation structures 12 between the first heating structure 131 and the second heating structure 132 is greater than a total thermal resistance of all the separation structures 12 between the second heating structure 132 and the third heating structure 133. A thermal resistance reflects a capability of the separation structure 12 to prevent heat transfer. When the second heating portion 142 heats an aerosol, for example, when the second heating portion 142 heats the second aerosol substrate 30, an axial position of a substrate segment is relatively high, and a functional segment such as the porous segment 32 is disposed below the substrate segment; the porous segment 32 is generally made of fiber cotton, when the porous segment 32 is heated with excessive heat, a physical structure of the fiber cotton may be damaged, and some harmful gases or odors may be generated; and therefore, it is not only necessary to control the first heating structure 131 not to generate heat through a controller, but also necessary to ensure that thermal resistances of the separation structures 12 between the first heating structure 131 and the second heating structure 132 are relatively high through structural design, so as to prevent damage to a physical structure of the porous segment 32 when the second heating portion 142 heats the second aerosol substrate 30.

[0035] In an embodiment, as shown in FIGS. 1 and 2, the number of the separation structures 12 between the first heating structure 131 and the second heating structure 132 is greater than the number of the separation structures 12 between the second heating structure 132 and the third heating structure 133. In this embodiment, thermal resistances of all the separation structures 12 are identical or slightly different, and the total thermal resistance of all the separation structures 12 between the first heating structure 131 and the second heating structure 132 may be increased by increasing the number of the separation structures 12 between the first heating structure 131 and the second heating structure 132. In addition to increasing the number, types of the separation structures 12 between the second heating structure 132 and the first heating structure 131 may be changed, and a separation structure with a larger thermal resistance may be selected.

[0036] As shown in FIG. 2, multiple rows of the separation structures 12 are arranged between the first heating structure 131 and the second heating structure 132, and one row of the separation structures 12 is disposed between the second heating structure 132 and the third heating structure 133, where among the multiple rows of the separation structures 12 between the first heating structure 131 and the second heating structure 132, the separation structures 12 of each row may be axially arranged in a staggered manner, to further increase a total thermal resistance of the multiple rows of the separation structures 12.

[0037] In an embodiment, each of the separation structures 12 is shaped like a hole, protrusion, recess, or the like, and the separation structures 12 on the heating body 10 may belong to the same type, or the separation structures 12 thereon may be different in types. In an embodiment, the heating body 10 may further include heat insulators (not shown in the figure), the heat insulators are embedded in the separation structures 12, and the heat insulators are made of a heat-insulating material, thereby further increasing a thermal resistance at the separation structure 12 on the heating body 10.

[0038] In an embodiment, as shown in FIG. 5, the heating assembly further includes a porous member 40, and the porous member 40 is provided with a plurality of heating channels 41 penetrating through the porous member 40. The porous member 40 is installed at an end of the accommodating cavity 11 away from the insertion port 111. The first heating structure 131 is arranged on an outer periphery of the porous member 40 to heat an airflow in the heating channels 41 into a hot airflow, and the hot airflow is configured to flow into the aerosol substrate and heat the aerosol substrate. Preferably, an end of the first heating structure 131 away from the insertion port 111 is arranged around the outer periphery of the porous member 40.

[0039] When the first aerosol substrate 20 is inserted into the accommodating cavity 11, the first substrate segment 21 abuts against the porous member 40, and an end of the first heating structure 131 close to the insertion port 111 and the second heating structure 132 are arranged around an outer periphery of the first substrate segment 21 to heat the first substrate segment 21, where the third heating structure 133 is controlled not to generate heat by the controller. During preheating, power of the second heating structure 132 is controlled to be greater than power of the first heating structure 131, such that an upper half of the first substrate segment 21 quickly generates aerosol, which facilitates generation of more aerosol in an early stage; and in a later half stage of heating, the power of the second heating structure 132 is controlled to be less than the power of the first heating structure 131, such that the first substrate segment 21 is uniformly heated mainly by means of hot airflow, and the second heating structure 132 has a certain amount of heat to ensure that the aerosol does not condense.

[0040] When the second aerosol substrate 30 is inserted into the accommodating cavity 11, since the second substrate segment 31 is connected to an end of the porous segment 32 facing the insertion port 111, the porous segment 32 abuts against the porous member 40, the end of the first heating structure 131 close to the insertion port 111 is arranged around an outer periphery of the porous segment 32, and the second heating structure 132 and the third heating structure 133 are arranged around an outer periphery of the second substrate segment 31 to heat the second substrate segment 31. To prevent damage to the physical structure of the porous segment 32 caused by overheating, it is necessary to control the first heating structure 131 not to generate heat through the controller. During preheating, the power of the third heating structure 133 is controlled to be greater than the power of the second heating structure 132, such that an upper half of the second substrate segment 31 quickly generates aerosol, which facilitates generation of more aerosol in an early stage; and in a later half stage of heating, the power of the third heating structure 133 is controlled to be less than the power of the second heating structure 132, such that a lower half of the second substrate segment 31 further generates aerosol, and the third heating structure 133 has a certain amount of heat to ensure that the aerosol does not condense.

[0041] In an embodiment, as shown in FIG. 2, the heating body 10 is further provided with a first electrode 15, a second electrode 16, a third electrode 17, and a fourth electrode 18, where the first electrode 15 and the second electrode 16 are respectively connected to two ends of the first heating structure 131, the third electrode 17 and the fourth electrode 18 are respectively connected to two ends of the third heating structure 133, one end of the second heating structure 132 is connected to the first electrode 15, and the other end of the second heating structure 132 is connected to the third electrode 17. The second heating structure 132 shares electrodes with the first heating structure 131 and the third heating structure 133, which reduces the number of electrodes, simplifies a circuit structure, minimizes connection points and welding processes, and lowers production complexity and failure rate; and in other embodiments, the second heating structure 132 may have an independent electrode.

[0042] As shown in FIGS. 6 and 7, the present disclosure further provides an aerosol-generating device, and the aerosol-generating device includes a bracket assembly 50 and a heating assembly, and the heating assembly is fixed on the bracket assembly 50. Additionally, the aerosol-generating device may further include a housing, a power supply, a controller, a microphone, and other assemblies.

[0043] In an embodiment, the bracket assembly 50 includes a first bracket 51 and a second bracket 52, the first bracket 51 is internally provided with an installation cavity 511, and both the heating body 10 and the second bracket 52 are disposed in the installation cavity 511; and the second bracket 52 supports an end of the heating body 10 away from the insertion port 111, the first bracket 51 abuts against an end of the heating body 10 close to the insertion port 111, an air inlet channel 512 is formed between a cavity wall of the installation cavity 511 and the heating body 10, and the air inlet channel 512 communicates with the accommodating cavity 11. Both the first bracket 51 and the second bracket 52 are provided with holes, such that an end of the air inlet channel 512 close to the insertion port 111 communicates with ambient atmosphere, and an end of the air inlet channel 512 away from the insertion port 111 communicates with the accommodating cavity 11 through the second bracket 52. Thus, air intake from a top of the aerosol-generating device may be achieved, without need to additionally arrange an air channel member connected to a bottom of the aerosol-generating device, which simplifies a structure of the aerosol-generating device; and notably, in other embodiments, an air channel member may be arranged to communicate with the second bracket 52 to achieve air intake from the bottom of the aerosol-generating device.

[0044] The first bracket 51 and the second bracket 52 may be made of a high-temperature-resistant and low-thermal-conductivity material, such as polyether ether ketone, to prevent the heat transfer of the heating body 10 to an exterior of the bracket assembly 50. A base material of the heating body 10 may be a metal or ceramic circumferential heating tube, and the heating structure is a thick-film printed heating structure on a heating tube; and alternatively, the heating body 10 may be an infrared heating body, an electromagnetic induction heating body, or an electrothermal film-coated heating tube. The porous member 40 may be made of a high thermal conductivity material, such as aluminum, copper, or the like.

[0045] The above specific embodiments are applied to describe the present disclosure, are only intended to help understand the present disclosure, and are not intended to limit the present disclosure. For those skilled in the art to which the present disclosure belongs, several simple deductions, modifications, or substitutions may also be made according to the ideas presented in the present disclosure.

Claims

1. A heating assembly, comprising: a heating body (10), wherein the heating body (10) is internally provided with an accommodating cavity (11), and the accommodating cavity (11) is configured to respectively accommodate at least two types of aerosol substrates (20,30) with substrate segments (21,31) at different axial positions; an end of the accommodating cavity (11) is provided with an insertion port (111), and the insertion port (111) is configured to insert the aerosol substrate (20,30) into the accommodating cavity (11); and the heating body (10) is provided with separation structures (12) and at least three heating structures (13), the at least three heating structures (13) are sequentially arranged in an axial direction of the accommodating cavity (11), a separation structure is disposed between every two adjacent heating structures, and the separation structure is configured to block heat transfer between the adjacent heating structures; and every two adjacent heating structures form a heating portion (14), and different heating portion (14)s are configured to be correspondingly arranged with substrate segments (21,31) of different aerosol substrates (20,30).

2. The heating assembly according to claim 1, wherein the heating body (10) is at least provided with a first heating structure (131), a second heating structure (132), and a third heating structure (133), wherein the first heating structure (131), the second heating structure (132), and the third heating structure (133) are sequentially arranged from a position away from the insertion port (111) to a position close to the insertion port (111); and a total thermal resistance of all the separation structures (12) between the first heating structure (131) and the second heating structure (132) is greater than a total thermal resistance of all the separation structures (12) between the second heating structure (132) and the third heating structure (133).

3. The heating assembly according to claim 2, wherein the number of the separation structures (12) between the first heating structure (131) and the second heating structure (132) is greater than the number of the separation structures (12) between the second heating structure (132) and the third heating structure (133).

4. The heating assembly according to claim 2, wherein each of the separation structures (12) is shaped like a hole, protrusion, or recess.

5. The heating assembly according to claim 2, wherein the heating body (10) further comprises heat insulators, and the heat insulators are embedded in the separation structures (12).

6. The heating assembly according to any one of claims 2-5, further comprising a porous member (40), wherein the porous member (40) is provided with a plurality of heating channels (41) penetrating through the porous member (40); the porous member (40) is installed at an end of the accommodating cavity (11) away from the insertion port (111); and the first heating structure (131) is arranged on an outer periphery of the porous member (40) to heat an airflow in the heating channels (41) into a hot airflow, and the hot airflow is configured to flow into the aerosol substrate (20,30) and heat the aerosol substrate (20,30).

7. The heating assembly according to claim 6, further comprising a first aerosol substrate (20) and a second aerosol substrate (30), wherein the first aerosol substrate (20) comprises a first substrate segment (21), when the first aerosol substrate (20) is inserted into the accommodating cavity (11), the first substrate segment (21) abuts against the porous member (40), and the first heating structure (131) and the second heating structure (132) are configured to heat the first substrate segment (21); and the second aerosol substrate (30) comprises a second substrate segment (31) and a porous segment (32), and when the second aerosol substrate (30) is inserted into the accommodating cavity (11), the porous segment (32) abuts against the porous member (40), and the second substrate segment (31) is connected to an end of the porous segment (32) facing the insertion port (111); and the second heating structure (132) and the third heating structure (133) are configured to heat the second substrate segment (31).

8. The heating assembly according to any one of claims 2-5, wherein the heating body (10) is further provided with a first electrode (15), a second electrode (16), a third electrode (17), and a fourth electrode (18), wherein the first electrode (15) and the second electrode (16) are respectively connected to two ends of the first heating structure (131), the third electrode (17) and the fourth electrode (18) are respectively connected to two ends of the third heating structure (133), one end of the second heating structure (132) is connected to the first electrode (15), and the other end of the second heating structure (132) is connected to the third electrode (17).

9. An aerosol-generating device, comprising a bracket assembly (50) and the heating assembly according to any one of claims 1-8, wherein the heating assembly is fixed on the bracket assembly (50).

10. The aerosol-generating device according to claim 9, wherein the bracket assembly (50) comprises a first bracket (51) and a second bracket (52), the first bracket (51) is internally provided with an installation cavity (511), and both the heating body (10) and the second bracket (52) are disposed in the installation cavity (511); and the second bracket (52) supports an end of the heating body (10) away from the insertion port (111), the first bracket (51) abuts against an end of the heating body (10) close to the insertion port (111), an air inlet channel (512) is formed between a cavity wall of the installation cavity (511) and the heating body (10), and the air inlet channel (512) communicates with the accommodating cavity (11).

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