Heating assembly and aerosol-generating apparatus

Abstract

The present disclosure relates to the technical field of aerosol generation. The present disclosure provides a heating assembly (103) and an aerosol-generating apparatus (100). The heating assembly includes a heating element (10). The heating element includes a heating element base (11) and a heating circuit (12), the heating element base includes a main body portion (113) and a bottom wall (114), the main body portion and the bottom wall enclose to form a receiving chamber (111), and the receiving chamber is configured to accommodate an aerosol-generating article (200); an end of the receiving chamber away from the bottom wall is provided with a port (112), and the port is configured to enable the aerosol-generating article to be inserted into and removed from the receiving chamber; and the heating circuit is configured to generate heat after being energized, and the heating circuit is disposed on the bottom wall. The heating assembly of the present disclosure can reduce a heating area of the aerosol-generating article and lower a temperature of the aerosol inhaled by the user.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] The present application claims priority to the Chinese Patent Application No.: 2024221240682 filed on August 30, 2024; the Chinese Patent Application No.: 202422131894X filed on August 30, 2024; the Chinese Patent Application No.: 2024226355714 filed on October 30, 2024; the Chinese Patent Application No.: 2024230723136 filed on December 12, 2024; and the Chinese Patent Application No.: 202423162917X filed on December 20, 2024, and the entirety of each of the afore-mentioned patent applications is hereby incorporated by reference herein.TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of aerosol generation, and in particular to a heating assembly and an aerosol-generating apparatus.BACKGROUND ART

[0003] An aerosol-generating apparatus is a device that heats an aerosol-generating article to generate aerosol for a user to inhale. The aerosol-generating apparatus may heat the aerosol-generating article through a heating assembly. The heating assembly has an internal receiving chamber, one end of the receiving chamber is provided with an opening, and the aerosol-generating article can be inserted into or removed from the receiving chamber through the opening.

[0004] However, a heating member of the heating assembly surrounds an outer periphery of the aerosol-generating article and heats a circumferential surface of a substrate segment of the aerosol-generating article. This heating method involves a relatively large heating area, which may cause the aerosol inhaled by the user to cause burning sensation.SUMMARY

[0005] The present disclosure provides an heating assembly and an aerosol-generating apparatus to solve the problem of mouth burning experienced by a user when inhales aerosol.

[0006] In order to solve the above technical problems, the present disclosure provides a heating assembly, including a heating element, where the heating element includes a heating element base and a heating circuit; the heating element base includes a main body portion and a bottom wall, where the bottom wall is disposed on an end of the main body portion, the main body portion and the bottom wall enclose to form a receiving chamber, and the receiving chamber is configured to accommodate an aerosol-generating article; and an end of the receiving chamber away from the bottom wall is provided with a port, the port is in fluid communication with the receiving chamber, and the port is configured to enable the aerosol-generating article to be inserted into and removed from the receiving chamber; and the heating circuit is configured to generate heat after being energized, and the heating circuit is disposed on the bottom wall.

[0007] In one embodiment, the heating element base is provided with a plurality of flow guide grooves, the plurality of flow guide grooves are arranged on a side of the heating element base facing the receiving chamber, and are in fluid communication with the port; and the flow guide grooves are configured to guide gas from the port to an end portion of the aerosol-generating article; the main body portion is a tubular structure having a first end and a second end disposed opposite each other, the port is formed at the first end of the main body portion, and the bottom wall is connected to the second end of the main body portion; and the flow guide grooves are formed on the main body portion.

[0008] In one embodiment, a limiting member is disposed on a side of the bottom wall facing the receiving chamber, and the limiting member is configured to abut against the end portion of the aerosol-generating article, such that when the aerosol-generating article is inserted into the receiving chamber, a gap is formed between the aerosol-generating article and the bottom wall; ends of the flow guide grooves away from the port are in fluid communication with the gap, and the gap and the flow guide grooves are configured to form gas flow channels.

[0009] In one embodiment, a plurality of recesses are arranged on an inner wall of the main body portion, and the plurality of recesses are evenly spaced around a center of the main body portion to form the flow guide grooves.

[0010] In one embodiment, the heating assembly further includes a mounting frame assembly, and the heating element base is suspended inside the mounting frame assembly; and the heating element base is provided with a connecting portion, and the connecting portion is connected to the mounting frame assembly.

[0011] In one embodiment, a first gas intake channel in fluid communication with an external environment is disposed in the mounting frame assembly, a second gas intake channel is disposed in the receiving chamber, and the first gas intake channel is in fluid communication with the second gas intake channel; and the second gas intake channel includes the flow guide grooves and the gap.

[0012] In one embodiment, the heating circuit is disposed on a side of the bottom wall away from the receiving chamber.

[0013] In one embodiment, the heating assembly further includes a cover body, where the cover body is disposed on the side of the bottom wall away from the receiving chamber, and the heating circuit is disposed between the cover body and the bottom wall, and is at least co-fired with the cover body into an integral unit.

[0014] In one embodiment, the fixing cavity is formed surrounding the side of the bottom wall away from the receiving chamber; and the heating circuit and the cover body are co-fired to form a co-fired ceramic member, and the co-fired ceramic member is fixed in the fixing cavity.

[0015] In one embodiment, the heating assembly further includes a heat-conducting member, where the heat-conducting member is disposed on the bottom wall and is connected to the bottom wall and the heating circuit, so as to fix the heating circuit to the bottom wall.

[0016] In one embodiment, the heating assembly further includes a mounting frame assembly and a reflecting member, where the heating element base is disposed in the mounting frame assembly, and the reflecting member is arranged between the heating element base and the mounting frame assembly.

[0017] In one embodiment, a thickness of the reflecting member is less than or equal to 0.2 mm; and / or the reflecting member is a reflective heat-insulating film made of a low-emissivity material.

[0018] The present disclosure further provides a heating assembly, including a mounting frame assembly, a heat-conducting member, a heating member and a reflecting member; where a gas intake is formed on the mounting frame assembly, and the heat-conducting member and the heating member are arranged in the mounting frame assembly; the heat-conducting member is a hollow structure with openings at both ends, the heating member is disposed at the opening of the heat-conducting member away from the gas intake, and enclose to form a receiving chamber together with the heat-conducting member for accommodating an aerosol-generating article, and a gas flow channel is formed in the receiving chamber and is in fluid communication with the gas intake and an interior of the aerosol-generating article; the heating member is configured to generate heat when being energized, and the heat-conducting member is configured to absorb at least a portion of the heat generated by the heating member and transfer at least a portion of the absorbed heat to the receiving chamber; and the reflecting member is disposed in the mounting frame assembly and on an outer side of the heat-conducting member, and the reflecting member is configured to reflect heat radiated outward by the heat-conducting member and / or the heating member.

[0019] In one embodiment, the heating member includes a heat transfer portion and a heating portion, where the heating portion is configured as a heating area, a heating film, or a heating circuit disposed on the heat transfer portion, and at least part of the heat transfer portion is connected to the heat-conducting member.

[0020] The present disclosure further provides an aerosol-generating apparatus, including a power supply assembly and the heating assembly described above, and the power supply assembly is configured to supply power to the heating assembly.

[0021] The present disclosure further provides a heating assembly, including a heating element. The heating element includes a heating element base and a heating circuit, the heating element base includes a main body portion and a bottom wall, and the main body portion and the bottom wall enclose to form a receiving chamber. Since the heating circuit is disposed on the bottom wall of the heating element base, the gas flow is heated into hot gas flow on the bottom wall of the heating element base. The hot gas flow flows to a bottom of the aerosol-generating article to heat the aerosol-generating article, that is, during a heating process, a position where the hot gas flow has a highest temperature is located near the bottom wall of the heating element base. Therefore, the bottom wall of a substrate segment of the aerosol-generating article has the highest temperature, which differs from the prior art in which an entire periphery of the substrate segment exhibits a high temperature. Therefore, the heating assembly of the present disclosure can reduce a heating area of the aerosol-generating article and lower a temperature of the aerosol inhaled by the user.BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG. 1 is a schematic structural diagram of an aerosol-generating apparatus with an aerosol-generating article inserted according to an embodiment. FIG. 2 is a sectional view of an aerosol-generating apparatus with an aerosol-generating article inserted according to an embodiment. FIG. 3 is a sectional view of a heating assembly with an aerosol-generating article inserted according to an embodiment. FIG. 4 is a schematic structural diagram of a heating element from one angle according to an embodiment. FIG. 5 is a schematic structural diagram of a heating element from another angle according to an embodiment. FIG. 6 is a schematic structural diagram of a heating element from yet another angle according to an embodiment. FIG. 7 is a schematic structural diagram of a heating assembly according to an embodiment. FIG. 8 is an exploded view of a heating assembly according to an embodiment. FIG. 9 is a sectional view of a heating assembly according to an embodiment. FIG. 10 is a schematic structural diagram of a heating assembly according to an embodiment. FIG. 11 is a schematic structural diagram of a heating assembly in an unassembled state according to an embodiment. FIG. 12 is a sectional view of a heating assembly according to an embodiment. FIG. 13 is a schematic structural diagram of an aerosol-generating apparatus according to an embodiment. FIG. 14 is a schematic structural diagram of an aerosol-generating apparatus according to an embodiment. FIG. 15 is a schematic structural diagram of a heating assembly and an aerosol-generating article according to an embodiment. FIG. 16 is a sectional view of FIG. 15. FIG. 17 is an exploded view of FIG. 16. FIG. 18 is a schematic diagram of gas flow directions in FIG. 16. FIG. 19 is a schematic structural diagram of the heating element illustrated in FIG. 15. FIG. 20 is a schematic structural diagram of FIG. 19 from another angle. FIG. 21 is an exploded view of FIG. 19. FIG. 22 is a sectional view of the heating element illustrated in FIG. 15. FIG. 23 is a sectional view of a structure of an aerosol-generating apparatus according to an embodiment. FIG. 24 is a sectional view of a structure of the heating assembly illustrated in FIG. 23. FIG. 25 is a schematic structural diagram of the heating member illustrated in FIG. 23. FIG. 26 is a schematic structural diagram of a reflecting member according to an embodiment. FIG. 27 is a sectional view of a structure of a heating element according to an embodiment. FIG. 28 is an exploded view of a structure of a heating assembly according to a sixth embodiment. FIG. 29 is a sectional view of the structure illustrated in FIG. 28. FIG. 30 is a partial enlarged view of Area A in FIG. 29. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] 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.

[0024] In addition, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. The operation steps described in the embodiments may also be replaced or adjusted in a manner apparent to those skilled in the art. Therefore, the specification and the accompanying drawings are merely for clear description of an embodiment, and are not to be construed as necessarily limiting the components and / or the sequence thereof.

[0025] 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.

[0026] The terms "parallel" and "perpendicular" used in the present disclosure are defined with respect to the current technological level, rather than being absolutely strict definitions in a mathematical sense. A small degree of deviation is permissible; and approximately parallel or approximately perpendicular is also acceptable. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and an angle between A and B ranges from 0° to 10°. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and an angle between A and B ranges from 80° to 100°. Directional terms such as "upper," "inner," "outer," "side," and the like used in the embodiments of the present disclosure are for illustrative purposes only, with reference to the orientation shown in the figures. Therefore, the directional terms used herein are for better and clearer explanation and understanding of the embodiments, rather than indicating or implying that the apparatus or element must have a specific orientation, or be constructed or operated in a specific orientation, therefore, these terms cannot be understood as limitation on the embodiments of the present disclosure.

[0027] Referring to FIGs. 1-6, a first embodiment of the present disclosure provides a heating assembly 103 (also referred to as a "heating unit", the same below) and an aerosol-generating apparatus 100; and the aerosol-generating apparatus 100 includes a housing 101, a power supply assembly 102, and the heating assembly 103. The power supply assembly 102, and the heating assembly 103 are all disposed in the housing 101. The heating assembly 103 includes a heating element 10 and a mounting frame assembly 20. The heating element 10 is connected to the mounting frame assembly 20, and the mounting frame assembly 20 is connected to the housing 101. The power supply assembly 102 is configured to supply power to the heating element 10. An aerosol-generating article 200 (also referred to as an "aerosol substrate" or "aerosol-generating substrate") is placed in the heating element 10. When being energized, the heating element 10 generates heat to heat the aerosol-generating article 200 in the heating element, thereby generating aerosol. The aerosol-generating article 200 may be used as a consumable of the aerosol-generating apparatus. Generally, the aerosol-generating article 200 may include a substrate segment, a cooling segment, and a filter tip segment. The substrate segment is configured to accommodate a grass leaf-based matrix, the cooling segment is configured to cool the aerosol generated by the substrate segment, and the filter tip segment is configured to filter the aerosol. A user can inhale the aerosol generated by the substrate segment by inhaling the filter tip segment. In the embodiments of the present disclosure, the aerosol-generating apparatus 100 may include the aerosol-generating article 200, or may exclude the aerosol-generating article 200.

[0028] Referring to FIGs. 2-5, the heating element 10 includes a heating element base 11 and a heating circuit 12. The heating element base 11 is provided with a receiving chamber 111 and a port 112 that is in fluid communication with the receiving chamber 111. The receiving chamber 111 is configured to accommodate the aerosol-generating article 200, and the port 112 is configured to allow the aerosol-generating article 200 to flow through and to be inserted into the receiving chamber 111 or removed from the receiving chamber 111. The heating circuit 12 is disposed in a region of the heating element base 11 opposite the port 112 and is configured to generate heat after being energized. The power supply assembly 102 is configured to supply power to the heating circuit 12. The heating element base 11 is thermally conductive, such that heat generated by the heating circuit 12 after being energized can be transferred to the receiving chamber 111 through the heating element base 11, thereby heating the aerosol-generating article 200 in the receiving chamber 111.

[0029] By adopting the above technical solution and arranging the receiving chamber 111 and the port 112 in fluid communication with the receiving chamber 111, the aerosol-generating article 200 can be inserted into or removed from the receiving chamber 111 through the port 112. Generally, the aerosol-generating article 200 is columnar. When the aerosol-generating article 200 is inserted into the receiving chamber 111 through the port 112, one end of the aerosol-generating article corresponds to a region of the heating element base 11 opposite the port 112. By placing the heating circuit 12 in the region of the heating element base 11 opposite the port 112, heat generated by the heating circuit 12 after being energized can rapidly heat the gas flow near an end portion of the aerosol-generating article 200. Since the heating circuit 12 is disposed only in the region of the heating element base 11 opposite the port 112, that is, the heating circuit 12 is arranged in a localized region of the heating element base 11, the heating element 10 is locally heated, which can reduce the heat energy loss of the heating element 10 compared with the technical solution of heating of the entire heating element (that is, the heating circuit 12 is arranged in an entire area of the heating element base 11).

[0030] In specific implementation, the heating element base 11 may be made of a material with high thermal conductivity, such as aluminum alloy, copper, aluminum nitride, aluminum oxide, and ceramic. By manufacturing the heating element base 11 from the high thermal conductivity material, the thermal performance of the heating element base 11 is improved, enabling the heat generated by the heating circuit 12 to be transferred to the receiving chamber 111 as much as possible, thereby reducing thermal energy loss.

[0031] Referring to FIGs. 3-5, the heating element base 11 includes a main body portion 113 and a bottom wall 114. The main body portion 113 is configured as a tubular structure with a first end and a second end disposed opposite each other. The port 112 is formed at the first end of the main body portion 113, and the bottom wall 114 is connected to the second end of the main body portion 113. The main body portion 113 and the bottom wall 114 enclose to form the receiving chamber 111. In specific implementations, an inner diameter of the main body portion 113 matches the aerosol-generating article 200, such that the aerosol-generating article 200 can be stably accommodated in the receiving chamber 111.

[0032] In some embodiments, the heating element base 11 may also be referred to as a "cup body". Since the main body portion 113 and the bottom wall 114 enclose to form the receiving chamber 111, the main body portion 113 is a tubular structure, and the heating element base 11 is thermally conductive, the main body portion 113 may also be referred to as a "side wall" or a "heat-conducting element"; and the bottom wall 114 may be referred to as a "bottom" or a "heat-conducting portion". The receiving chamber 111 is configured to accommodate and heat the aerosol-generating article 200, and the receiving chamber 111 may also be referred to as the "heating chamber."

[0033] The heating circuit 12 is disposed on the bottom wall 114. When the aerosol-generating article 200 is inserted into the receiving chamber 111, an end portion of the aerosol-generating article 200 corresponds to the bottom wall 114. The heating circuit 12 is disposed on the bottom wall 114, gas flow at the end portion of the aerosol-generating article 200 can be rapidly heated. In addition, when the aerosol-generating apparatus 100 is used, the first end of the main body portion 113 is located above the second end, that is, the bottom wall 114 is located below, and the heat moves upward. Therefore, the heating circuit 12 is placed on the bottom wall 114, and the generated heat moves upward after the heating circuit 12 is energized, and can be more effectively utilized to heat the aerosol-generating article 200, thereby improving heat utilization rate, reducing energy loss, and limiting a heating area of the aerosol-generating article 200, which helps lower a temperature of the aerosol inhaled by the user.

[0034] In one embodiment, the heating circuit 12 is disposed on a side of the bottom wall 114 away from the receiving chamber 111, that is, the heating circuit 12 is disposed on an outer side of the bottom wall 114. In specific implementation, the heating circuit 12 is electrically connected to the power supply component 102, and the power supply assembly 102 supplies power to the heating circuit, such that the heating circuit 12 can generate heat. By disposing the heating circuit 12 on the outer side of the bottom wall 114, it is convenient to realize an electrical connection between the heating circuit 12 and the power supply component 102. Moreover, disposing the heating circuit 12 on the outer side of the bottom wall 114 also makes the assembly process more convenient and efficient for the operators. Of course, in other embodiments, the heating circuit 12 may be alternatively disposed on an inner side of the bottom wall 114 facing the receiving chamber 111, or disposed inside the bottom wall 114.

[0035] Referring to FIGs. 2, 4, and 6, the heating circuit 12 includes a circuit body 121 and two heating end portions 122. The heating end portions 122 are disposed on opposite sides of the bottom wall 114, and two ends of the circuit body 121 are respectively connected to the two heating end portions 122. The circuit body 121 is arranged in a bent configuration. The two heating end portions 122 are configured to connect electrical contact pins (not shown in the figure), thereby achieving an electrical connection between the heating circuit 12 and the power supply assembly 102. In specific implementation, the circuit body 121 is arranged in a bent configuration, such that the heating circuit 12 can cover the entire bottom wall 114, and a region of the receiving chamber 111 corresponding to the bottom wall 114 can be evenly heated, all parts at the end portion of the aerosol-generating article 200 can be heated simultaneously. It should be noted that a specific shape formed by the bending of the circuit body 121 is not limited, and may be as shown in FIG. 6 or other shapes. In this embodiment, a single set of the heating circuit 12 is provided. It can be understood that in other embodiments, at least two sets of the heating circuit 12 may be provided.

[0036] In one embodiment, the heating circuit 12 is formed on the heating element base 11 using thick-film printing process. In specific implementation, the thick-film printing process may be either metal thick-film printing or ceramic thick-film printing.

[0037] When the heating circuit 12 is printed onto the heating element base 11 using the thick-film printing process, the heating circuit 12 is structured as a layered body and integrally formed with the heating element base 11 due to the characteristics of the thick-film printing process. Compared with the technical solution in which the heating circuit 12 is separately arranged on the heating element base 11, this configuration reduces assembly steps, thereby improving the assembly efficiency of the heating element 10. Moreover, the integrated structure enhances a connection strength between the heating circuit 12 and the heating element base 11.

[0038] For a heating circuit 12, those skilled in the art should understand that shape and heating method of the heating circuit 12 are not limited. For example, the heating method of the heating circuit 12 may be resistive heating or electromagnetic induction heating, and the shape of the heating circuit 12 may be serpentine, circular, square, or other shapes. The heating circuit 12 may be in the form of a heating filament, a heating film, or other types, and the shape of the heating circuit 12 may be circular or flat.

[0039] In some embodiments, a material of the heating circuit 12 may be a metal such as tungsten or platinum. The heating circuit 12 may be configured as an iron-nickel alloy heating circuit or a titanium heating circuit. By using metal materials such as tungsten or platinum having excellent chemical stability at high temperatures, the heating circuit 12 cannot only adapt to heating temperatures in a co-sintering process, but also help maintain stable heating performance during operation, thereby improving the heating effect.

[0040] In some embodiments, based on a heating function of the heating circuit 12, the heating circuit 12 may also be referred to as a heating element, a heating member, a heating layer, or a heating portion.

[0041] Referring to FIGs. 3 and 4, a plurality of flow guide grooves 115 (also referred to as "gas intake grooves" or "first flow channels") in fluid communication with the port 112 are formed on a side of the heating element base 11 facing the receiving chamber 111. The port 112 is configured to allow gas flow to flow through and enter the flow guide grooves 115, and the flow guide grooves 115 are configured to guide the gas flow from the port 112 to the end portion of the aerosol-generating article 200. The flow guide grooves 115 are formed on a side of the main body portion 113 facing the receiving chamber 111, that is, the flow guide grooves 115 are formed on an inner side of the main body portion 113, In this way, gas flow from an exterior of the heating element 10 flows to the end portion of the aerosol-generating article 200 through the port 112 and the flow guide grooves 115 in sequence. In specific implementation, when the gas flow passes through the flow guide grooves 115, the heating element base 11 heats the flowing gas flow, such that a temperature of the gas flow passing through the end portion of the aerosol-generating article 200 is higher than the a temperature of the gas flow outside the heating element.

[0042] Referring to FIGs. 3 and 4, a limiting member 116 (also referred to as a "support protrusion" or a "support portion", the same below) is formed on a side of the bottom wall 114 facing the receiving chamber 111, that is, an inner side of the bottom wall 114 is provided with the limiting member 116. The limiting member 116 is configured to abut against the end portion of the aerosol-generating article 200, such that when the aerosol-generating article 200 is inserted into the receiving chamber 111, a gap 13 (also referred to as an "air-guiding gap" or a "gap", the same below) is formed between the aerosol-generating article and the bottom wall 114. The gap 13 and the flow guide grooves 115 are configured to form gas flow channels. Ends of the flow guide grooves 115 away from the port 112 are in fluid communication with the gap 13, such that the gas flow from the port 112 can be guided to the gap 13 by the flow guide grooves 115. In this way, the port 112, the flow guide grooves 115, and the gap 13 form a continuous gas flow channel, the gas flow can flow from outside the heating element 10 to the gap 13 through the port 112 and the flow guide grooves 115 in sequence, and then to an interior of the aerosol-generating article 200 through the gap 13 and the end portion of the aerosol-generating article 200. The limiting member 116 may also be arranged on the main body portion 113.

[0043] In specific implementation, when the gas flow flows through the flow guide grooves 115 and the gap 13, the heating element base 11 may heat the flowing gas flow to convert the cold gas flow into hot gas flow, that is, the gas flow entering the aerosol-generating article 200 is hot gas flow, thereby heating the aerosol-generating article 200.

[0044] The inner diameter of the main body portion 113 matches the aerosol-generating article 200, such that the aerosol-generating article 200 can be placed in the receiving chamber 111, and the inner side of the main body portion 113 is in contact with the outer periphery of the aerosol-generating article 200. In this way, the main body portion 113 not only heats the gas flow flowing through the flow guide grooves 115, but also directly heats the outer periphery of the aerosol-generating article 200 by contacting the aerosol-generating article 200, thereby improving the efficiency of heating the aerosol-generating article 200.

[0045] In one embodiment, a plurality of flow guide grooves 115 are formed on the inner side of the main body portion 113, and the plurality of flow guide grooves 115 are evenly spaced apart in a circumferential direction of the main body portion 113, such that gas flow from the flow guide grooves 115 to the gap 13 is evenly distributed in a circumferential direction of the aerosol-generating article 200, and the aerosol-generating article is evenly heated. In addition, the main body portion 113 can evenly and directly heat the aerosol-generating article 200 in the circumferential direction.

[0046] Referring to FIGs. 2-4, the heating element base 11 further includes a connecting portion 117. The connecting portion 117 is disposed at the first end of the main body portion 113 and configured to be connected to the mounting frame assembly 20 of the heating assembly 103. Since the bottom wall 114 is connected to the second end of the main body portion 113 and the heating circuit 12 is disposed on the bottom wall 114, the heating circuit 12 is located at the second end of the main body portion 113, and the connecting portion 117 is disposed at the first end of the main body portion 113, such that the heating circuit 12 and the connecting portion 117 are spaced relatively far apart. Since the heating circuit 12 is located at a distance away from the mounting frame assembly 20, most of the heat generated by the heating circuit 12 is transferred to the corresponding receiving chamber 111 during the process of transferring to the mounting frame assembly 20, and the heat is used to heat the aerosol-generating article 200. As a result, the heat absorbed by the mounting frame assembly 20 is reduced, and the heat energy loss is further reduced.

[0047] In one embodiment, the connecting portion 117 includes a flange 1171 (also referred to as a "flange rim," a "second snap-fit protrusion," or a "protruding portion", the same below), and the flange 1171 is arranged in a circumferential direction of the main body portion 113. In specific implementation, the flange 1171 is connected to the mounting frame assembly 20, such that the heating element 10 is connected to the mounting frame assembly 20.

[0048] Referring to FIGs. 3 and 4, the mounting frame assembly 20 includes a first sleeve 21 (also referred to as a "top cover" or a "cover body", the same below) and a second sleeve 22 (also referred to as a "mounting tube" or a "support sleeve body," the same below). The first sleeve 21 includes a first sleeve body 211 and a first inwardly recessed tube 212 (also referred to as a "first snap-fit protrusion") that are coaxially arranged. The first inwardly recessed tube 212 is recessed inward from one end or from an interior of the first sleeve body 211. The second sleeve 22 includes a second sleeve body 221 and a second inwardly recessed tube 222 that are coaxially arranged. The second inwardly recessed tube 222 is recessed inward from one end or from an interior of the second sleeve body 221. The first sleeve body 211 is connected to one end of the second sleeve body 221, and the first inwardly recessed tube 212 extends into the second sleeve body 221, and extends in a direction close to the second inwardly recessed tube 222. The heating element 10 is connected between the first inwardly recessed tube 212 and the second inwardly recessed tube 222, and is suspended inside the second sleeve 22. In specific implementation, the connecting portion 117 is connected between the first inwardly recessed tube 212 and the second inwardly recessed tube 222. By connecting the connecting portion 117 to the mounting frame assembly 20, the heating element 10 is suspended, which helps reduce the heat energy loss.

[0049] In this embodiment, the connecting portion 117 is configured as a flange 1171. The flange 1171 is supported on the second inwardly recessed tube 222, the first inwardly recessed tube 212 is located above the flange 1171, that is, the flange 1171 is sandwiched between the first inwardly recessed tube 212 and the second inwardly recessed tube 222, this configuration can improve the firmness of a connection between the heating element 10 and the mounting frame assembly 20.

[0050] Referring to FIGs. 2 and 3, the heating assembly 103 further includes a base 30 (also referred to as a "base body"), the base 30 is connected to an end of the second sleeve body 221 away from the first sleeve body 211. The first sleeve 21, the second sleeve 22, and the base 30 all have thermal insulation functions, thereby further reducing the heat energy loss. The heating element 10 in the heating assembly 103 is suspended inside the mounting frame assembly 20.

[0051] In a second embodiment, referring to FIGs. 7-14, the heating assembly includes a heating element base 100a, a cover body 150, and a heating circuit 200a.

[0052] The heating element base 100a may be understood as a structural main body of the heating assembly, and the cover body 150 is configured to fix the heating circuit 200a to the heating element base 100a. The cover body 150 is disposed on a side of a bottom wall 120 away from a receiving chamber 130. The heating circuit 200a is disposed between the bottom wall 120 and the cover body 150, and is at least co-fired with the cover body 150 into an integral unit.

[0053] By disposing the heating circuit 200a between the bottom wall 120 and the cover body 150, heat generated by the heating circuit 200a can be conducted to the receiving chamber 130 through the bottom wall 120, thereby heating an aerosol-generating article 600 in the receiving chamber 130. Moreover, the heating circuit 200a is at least co-fired with the cover body 150 into an integral unit to limit a position of the heating circuit 200a by bonding with the cover body 150, such that when the heating assembly heats, the heating circuit 200a is not easy to separate due to different degrees of thermal expansion between the cover body 150 and the bottom wall 120, thereby improving the operational stability and prolonging the service life of the heating assembly.

[0054] In one embodiment, referring to FIGs. 7-9, the bottom wall 120, the heating circuit 200a, and the cover body 150 are co-fired as an integral unit to improve the fixing effect of the bottom wall 120 and the cover body 150 on the heating circuit 200a, which helps reduce a risk of separation of the heating circuit 200a.

[0055] In order to improve the heating efficiency of the heating assembly and reduce heat energy loss, in some embodiments, a thermal conductivity of the bottom wall 120 and / or the cover body 150 is not less than 15 W / (m•K), that is, the bottom wall 120 and / or the cover body 150 may be made of a material with a thermal conductivity of not less than 15 W / (m•K), such as aluminum nitride, silicon carbide, aluminum oxide, or other high thermal conductivity ceramic materials. Those skilled in the art should understand that, for the purpose of co-firing, the bottom wall 120 and the cover body 150 may be made of the same or similar materials to improve compatibility of the bottom wall 120 and the cover body 150, and avoid stress problems caused by large differences in the thermal expansion coefficients of the materials used.

[0056] In another embodiment, referring to FIGs. 10-11, the bottom wall 120 is surrounded by a fixing cavity 140 on a side away from the receiving chamber 130. The heating circuit 200a and the cover body 150 are co-fired to form a co-fired ceramic member 160, and the co-fired ceramic member 160 is fixed in the fixing cavity 140. In other embodiments, the heating circuit 200a may also be co-fired inside the cover body 150 as needed, to reduce the risk of separation between the heating circuit 200a and the cover body 150.

[0057] By co-firing the heating circuit 200a with the cover body 150 to form the co-fired ceramic member 160 and fixing the co-fired ceramic member 160 in the fixing cavity 140, the heating circuit 200a is fixed in the fixing cavity 140 and is less likely to separate due to thermal expansion.

[0058] In order to reduce a thermal resistance of the heating assembly, the heating element base 100a and the cover body 150 may be made of materials with high thermal conductivity. In some embodiments, the main body portion 110, the bottom wall 120, and the cover body 150 may all be made of ceramic materials with a thermal conductivity of not less than 15 W / (m•K), such as aluminum nitride, silicon carbide, and aluminum oxide. The co-fired ceramic member 160 formed by co-firing can be fixed in the fixing cavity 140 using a high-temperature resistant ceramic adhesive.

[0059] In some other embodiments, the bottom wall 120 and the main body portion 110 may also be made of metal materials with a thermal conductivity of not less than 15 W / (m•K), such as copper, and aluminum alloy.

[0060] In one embodiment, referring to FIGs. 10-11, the main body portion 110 made of the metal material extends in a direction away from the receiving chamber 130 to form a fixing protrusion 111a. The fixing protrusion 111a encloses to form the fixing cavity 140. The co-fired ceramic member 160 may be snap-fitted and fixed in the fixing cavity 140 by the fixing protrusion 111a.

[0061] By way of example, the main body portion 110 may be provided with a fixing protrusion 111a extending in the direction away from the receiving chamber 130. The fixing protrusion 111a is provided with a protruding portion 1111 extending in a direction away from the receiving chamber 130. After the co-fired ceramic member 160 is placed into the fixing cavity 140, the protruding portion 1111 is bent in a direction close to the co-fired ceramic member 160, such that the bent protruding portion 1111 fixes the co-fired ceramic member 160 in the fixing cavity 140.

[0062] Those skilled in the art should understand that the co-fired ceramic member 160 can be fixed in the fixing cavity 140 by bonding, welding, snap-fitting, threaded connection, or other connection methods, as long as the fixing method can meet design and usage requirements.

[0063] In order to further improve the thermal conduction effect from the co-fired ceramic member 160 to the bottom wall 120, in one embodiment, a thermally conductive layer may be formed on a surface of a side of the co-fired ceramic member 160 near the bottom wall 120. A thermal conductivity of the thermally conductive layer is greater than that of the co-fired ceramic member 160. In some embodiments, the thermally conductive layer may be a thermally conductive plating layer, such as a copper plating layer, formed on the surface of the co-fired ceramic member 160. In some other embodiments, the thermally conductive layer may be a thermally conductive coating layer, such as a graphite coating, applied and co-fired on the surface of the co-fired ceramic member 160. Those skilled in the art should understand that the formation method and materials of the thermally conductive layer are not limited, as long as the thermal conduction effect from the co-fired ceramic member 160 to the bottom wall 120 is improved.

[0064] In some further embodiments, referring to FIG. 12, the heating circuit 200a is connected to a lead wire 210, the lead wire 210 extends out from the cover body 150, such that the lead wire 210 supplies power to the heating circuit 200a. When current passes through the heating circuit 200a, the heating circuit 200a generates heat based on Joule heating effect. In other embodiments, the lead wire 210 may also extend from the main body portion 110 or other components. Other conductive elements such as contact points may also be used instead of the lead wire 210 for conducting electricity. The conductive elements only need to have an electrical contact portion exposed outside the heating element base 100a or the cover body 150.

[0065] In one embodiment, the heating circuit 200a may also be disposed in the main body portion 110 to increase a heating area of the heating element base 100a. Moreover, in some embodiments, the main body portion 110 and the heating circuit 200a arranged therein may be co-fired as an integral unit. The specific method can refer to the method for co-firing the heating circuit 200a between the bottom wall 120 and the cover body 150, which will not be repeated herein.

[0066] In one embodiment, referring to FIGs. 9 to 14, a second gas intake channel 131 (also referred to as the "gas flow channel" in the foregoing embodiments, or a "gas channel", which is configured to guide gas flow in the heating chamber, the same below) is formed on a chamber wall of the receiving chamber 130. The second gas intake channel 131 is in fluid communication with an opening (also referred to as an "insertion port" or "port") of the receiving chamber 130. The second gas intake channel 131 is configured to enable gas flow outside the heating assembly to flow into the receiving chamber 130, and enter the aerosol-generating article 600 accommodated in the receiving chamber 130. By providing the second gas intake channel 131, the heating assembly can heat the aerosol-generating article 600 through the hot gas flow, which is conducive to improving heating uniformity and heating efficiency.

[0067] By way of example, a first protrusion 112a (corresponding to a "rib" or a "protruding portion 3212" in FIG. 29) is formed on a side of the main body portion 110 facing the receiving chamber 130, a plurality of the first protrusions 112a are spaced apart in a circumferential direction of the receiving chamber 130, such that a flow guide groove 1311 in fluid communication with the opening of the receiving chamber 130 is formed between adjacent first protrusions 112a, and an are enclosed by each first protrusion 112a is configured for inserting the aerosol-generating article 600. A second protrusion 121a (corresponding to the "limiting members" in the foregoing embodiments, the same below) is formed on a side of the bottom wall 120 facing the receiving chamber 130, one or a plurality of the second protrusions may be spaced apart, such that when the aerosol-generating article 600 is inserted into the receiving chamber 130, a gap 1312 is formed between the aerosol-generating article 600 and the bottom wall 120. The gap 1312 is in fluid communication with the flow guide grooves 1311 to form the second gas intake channel 131, such that the gas flow after entering the second gas intake channel 131 through the opening of the receiving chamber 130 can be heated during the flow, and the heated gas flow then enters and heats heat the aerosol-generating article 600 to improve the heating uniformity and heating efficiency.

[0068] Those skilled in the art should understand that the first protrusions 112a may be arranged only on the chamber wall of the receiving chamber 130 near a side of the opening (as shown in FIG. 12), or be arranged only on the chamber wall of the receiving chamber 130 away from a side of the opening, or the first protrusions 112a may be evenly spaced apart on the entire chamber wall of the receiving chamber 130 to form the flow guide grooves 1311. The gap 1312 may also be formed by grooves arranged on the bottom wall 120. In summary, the second gas intake channel 131 can be arranged in any form, as long as the configuration meets the functional and usage requirements.

[0069] In one embodiment, referring to FIGs. 12 to 14, a mounting frame assembly 500 is disposed in a housing 300. The mounting frame assembly 500 includes mounting chamber 540 for installing the heating assembly. When the heating assembly is installed in the mounting chamber 540, an isolation space 550 is formed outside the heating assembly. The isolation space 550 can form an air insulation layer for the heating assembly, which helps reduce heat energy loss during heating and thereby improves heating efficiency.

[0070] In some embodiments, referring to FIGs. 13 and 14, a substrate insertion port 310 is formed on the housing 300. The mounting frame assembly 500 is installed in the housing 300 corresponding to the substrate insertion port 310. The mounting frame assembly 500 includes a second sleeve 510, and a base 520 and a first sleeve 530 respectively installed at opposite ends of the second sleeve 510. The second sleeve 510, the base 520, and the first sleeve 530 enclose together to form the mounting chamber 540. A through hole 531 is formed on the first sleeve 530 corresponding to the substrate insertion port 310. When the heating assembly is installed in the mounting chamber 540, the receiving chamber 130 is in fluid communication with the substrate insertion port 310 through the through hole 531. The second sleeve 510, base 520, and first sleeve 530 can all be made of materials with relatively low thermal conductivity, such as polyetheretherketone (PEEK) or polyphenylsulfone (PPSU), to improve insulation effect and reduce heat energy loss.

[0071] A limiting protrusion 541 may be disposed on an inner side wall of the mounting chamber 540 in a circumferential direction of the mounting chamber 540. A flange 113a is formed on the main body portion 110 on a peripheral side of the opening of the receiving chamber 130, and the flange 113a is snap-fitted on the limiting protrusion 541, such that the heating assembly is suspended inside the mounting chamber 540, thereby forming the isolation space 550 between the outer side of the heating assembly and the chamber wall of the mounting chamber 540. The first sleeve 530 may further include a limiting portion 532, the limiting portion 532 can cooperate with the limiting protrusion 541 to snap-fit the flange 113a, thereby fixing the heating assembly by limiting the flange 113a.

[0072] In some embodiments, referring to FIG. 8, the second sleeve 510 and the base 520 may be replaced by an installation cup.

[0073] In one further embodiment, a thermal radiation reflective layer may be disposed on the chamber wall of the mounting chamber 540 to enhance the thermal insulation effect on the heating assembly. For example, aluminum foil may be disposed on an inner wall of the second sleeve 510 as the thermal radiation reflective layer.

[0074] Those skilled in the art should understand that the power supply assembly 400 (also referred to as the "energy supply unit") is configured to supply energy to the heating circuit 200a. According to different heating principles of the heating circuit 200a, the power supply assembly 400 may have various configurations. For example, when the heating circuit 200a is a resistive heating circuit, the power supply assembly 400 may include a battery cell or a combination of a battery cell, a circuit board and other related components to supply electrical energy to the heating circuit 200a. When the heating circuit 200a is an electromagnetic induction heating circuit, the power supply assembly 400 may be a combination of an electromagnetic coil and a battery cell, or a combination of an electromagnetic coil, a battery cell, a circuit board and other related components to provide an induced magnetic field to the heating circuit 200a, enabling the heating circuit 200a to generate heat through induced eddy current. In summary, the power supply assembly 400 may be configured in any form, as long as it can provide the energy required for heating to the heating circuit 200a.

[0075] Referring to FIGs. 15-22, in some embodiments, the heating assembly 20a includes a mounting frame assembly 21a, a heating circuit 22a, and a heat-conducting member 23. The mounting frame assembly 21a includes a first sleeve 213 and a second sleeve 212a. A first gas intake channel 211a in fluid communication with an external environment is disposed in the mounting frame assembly 21a. The heating circuit 22a includes a heating element base 221a, heating element 222a and wire 223 ∘ A second gas intake channel 2215 (corresponding to the gas flow channel in the foregoing embodiments, the same below) in fluid communication with the first gas intake channel 211a is formed inside a receiving chamber 2213, and the second gas intake channel 2215 is disposed on a main body portion 2211. Specifically, the main body portion 2211 may be configured to form the second gas intake channel 2215 alone, or the main body portion 2211 may cooperate with other components to form the second gas intake channel 2215. One end of the second gas intake channel 2215 is in fluid communication with the first gas intake channel 211a, and the other end of the second gas intake channel 2215 is in fluid communication with the receiving chamber 2213. Thus, as shown in FIG. 18, when a user inhales the aerosol-generating article 10a, external gas flow can enter the aerosol-generating article 10a arranged in the receiving chamber 2213 through the first gas intake channel 211a and the second gas intake channel 2215.

[0076] The heat-conducting member 23 is disposed on a bottom wall 2212 of the heating element base 221a, and is connected to the bottom wall 2212 and a heating circuit 22a, so as to fix the heating circuit 22a on the bottom wall 2212. The heat-conducting member 23 can fix the heating circuit 22a, and the heat-conducting member 23 may be made of a material with a relatively high thermal conductivity. For example, the heat-conducting member 23 may be configured as a ceramic adhesive heat-conducting member 23, such that energy from the heating circuit 22a can be quickly conducted to the second gas intake channel 2215 to heat the gas flow.

[0077] Since the heating circuit 22a is disposed on the bottom wall 2212 of the heating element base 221a, the gas flow is heated into hot gas flow on the bottom wall 2212 of the heating element base 221a. The hot gas flow flows to a bottom of the aerosol-generating article 10a to heat the aerosol-generating article 10a, that is, during a heating process, a position where the hot gas flow has a highest temperature is located near the bottom wall 2212 of the heating element base 221a. Therefore, a bottom of a substrate segment of the aerosol-generating article 10a has the highest temperature, which differs from the prior art in which an entire periphery of the substrate segment exhibits a high temperature. Therefore, the heating assembly 20a of the present disclosure can reduce a heating area of the aerosol-generating article 10a and lower a temperature of the aerosol inhaled by the user.

[0078] In one embodiment, as shown in FIGs. 16 and 17, the heat-conducting member 23 wraps the heating circuit 22a to seal the heating circuit 22a in the heat-conducting member 23. The heat-conducting member 23 wrapping the heating circuit 22a can prevent the heating circuit 22a from being damaged during use, and facilitates fixation of the heating circuit 22a to the bottom wall 2212 of the heating element base 221a. When fabricating the heating assembly 20a, the heating circuit 22a may be placed on the bottom wall 2212 of the heating element base 221a, and the heating circuit 22a may be then encapsulated with liquid ceramic adhesive, followed by sintering, such that the ceramic adhesive sinters together with the heating circuit 22a and the heating element base 221a.

[0079] As shown in FIG. 19, in one embodiment, the heat-conducting member 23 and the heating circuit 22a are arranged in the receiving chamber 2213, and arranged on the bottom wall 2212. Alternatively, as shown in FIGs. 20 to 22, the main body portion 2211 and the bottom wall 2212 enclose to form an installation space 2216, and the installation space 2216 is located on a side of the bottom wall 2212 away from the receiving chamber 2213. The heat-conducting member 23 and the heating circuit 22a are arranged in the installation space 2216. When the heat-conducting member 23 and the heating circuit 22a are arranged in the receiving chamber 2213, the heating circuit 22a is closer to the second gas intake channel, thereby increasing the heat transfer efficiency of the hot gas flow. When the heat-conducting member 23 and the heating circuit 22a are arranged in the installation space 2216, heat of the heating circuit 22a is first transferred to the heating element base 221a, such that contact heat transfer between the heating element base 221a and the aerosol-generating article 10a can be improved. These two configurations may be selected according to actual needs.

[0080] In one embodiment, as shown in FIG. 19, the main body portion 2211 includes a heat-conducting portion 2218. The heat-conducting portion 2218 is configured to contact a side surface of the aerosol-generating article 10a. The heat-conducting portion 2218 may be configured to limit the aerosol-generating article 10a and to contact and transfer heat to the aerosol-generating article 10a. The second gas intake channel 2215 includes a flow guide groove 2215a and a connection part 2215b. The heat-conducting portion 2218 is configured to define the flow guide groove 2215a; that is, the heat-conducting portion 2218 can form the flow guide groove 2215a alone, or the heat-conducting portion 2218 may form the flow guide groove 2215a together with other structures. a gas intake end of the flow guide groove 2215a is arranged near a port 2214 and is in fluid communication with the first gas intake channel 211a, and a gas outlet end of the flow guide groove 2215a is located near the bottom wall 2212, such that the gas flow entering the first gas intake channel 211a can enter the flow guide groove 2215a toward the gas outlet end of the flow guide groove 2215a through the gas intake end of the flow guide groove 2215a, and then flow to the bottom wall 2212 of the heating element base 221a. After being heated by the heating circuit 22a on the bottom wall 2212, the gas flow enters the aerosol-generating article 10a from a bottom surface of the aerosol-generating article 10a.

[0081] By arranging the gas intake end of the flow guide groove 2215a near the port 2214 and the gas outlet end of the flow guide groove 2215a near the bottom wall 2212, the gas flow passing through the flow guide groove 2215a flows along a periphery of the main body portion 2211 outside the aerosol-generating article 10a. When entering the flow guide groove 2215a, the gas flow can be heated by the heat-conducting portion 2218, such that the aerosol-generating article 10a is preheated from the outside of the aerosol-generating article 10a. The heat-conducting portion 2218 not only provides contact heat transfer to the aerosol-generating article 10a, but also preheats the gas flow in the flow guide groove 2215a, thereby improving the heating efficiency of the aerosol-generating article 10a and increasing the energy utilization rate by combining the hot gas flow heating and contact heat transfer.

[0082] As shown in FIG. 19, in one embodiment, the heat-conducting portion 2218 includes a plurality of protruding strips, and the protruding strips extend from a side of the main body portion 2211 near the port 2214 to a side of the main body portion 2211 away from the port 2214. The plurality of protruding strips are spaced apart in a circumferential direction of the main body portion 2211, such that the flow guide groove 2215a is formed between adjacent protruding strips. Preferably, the plurality of protruding strips are evenly spaced apart in a circumferential direction. One end of each protruding strip near a central axis of the heating assembly 20a is configured to contact a side surface of the aerosol-generating article 10a. Preferably, a contact surface between each protruding strip and the side surface of the aerosol-generating article 10a is an arc-shaped surface. The arc-shaped surface can better fit the cylindrical outer side surface of the aerosol-generating article 10a, such that the protruding strip and the aerosol-generating article 10a are in surface contact. Compared with point contact, the surface contact helps prevent localized excessive heat generation on the outer side surface of the aerosol-generating article 10a.

[0083] In one embodiment, the heating assembly 20a may further include a clamping member 24, and the clamping member 24 is mounted on the mounting frame assembly 21a. Preferably, the clamping member 24 is mounted on the first sleeve 213. The clamping member 24 is configured to clamp the aerosol-generating article 10a to prevent the aerosol-generating article 10a from moving during use.

[0084] Referring to FIGs. 23-27, in some embodiments, the heating assembly 300a includes a mounting frame assembly 310a, a heating element 320, and a reflecting member 330. A gas intake 311 is formed on the mounting frame assembly 310a, and is in fluid communication with an external environment, such that external air can enter an interior of the heating assembly 300a through the gas intake when a user inhales. The heating element 320 is disposed in the mounting frame assembly 310a. The heating element 320 includes a heat-conducting member 321 (corresponding to the main body portion in the foregoing embodiments) and a heating member 322 (corresponding to a combination of the heating circuit and the bottom wall in the foregoing embodiments). The heat-conducting member 321 is a hollow structure with openings at both ends. The heating member 322 is disposed at the opening of the heat-conducting member 321 away from the gas intake 311, and cooperates with the heat-conducting member 321 to define a receiving chamber 323 configured to an aerosol-generating article. A gas flow channel 324 is formed in the receiving chamber 323 and is in fluid communication with the gas intake and an interior of the aerosol-generating article. The heating member 322 is configured to generate heat when being energized, and the heat-conducting member 321 is configured to absorb at least a portion of the heat generated by the heating member 322 and transfer at least a portion of the absorbed heat to the receiving chamber 323. The receiving chamber 323 is configured to accommodate the aerosol-generating article. After the heat from the heating member 322 is transferred to the receiving chamber 323, the aerosol-generating article can be heated by contact thermal conduction, and the aerosol-generating article can be further heated through the hot gas flow. The reflecting member 330 is disposed in the mounting frame assembly 310a and on an outer side of the heat-conducting member 321. The reflecting member 330 is configured to reflect heat radiated outward by the heat-conducting member 321 and / or the heating member 322.

[0085] It should be noted that in the present disclosure, "inward" refers to a direction toward a center of the receiving chamber 323, and "outward" refers to a direction away from the center of the receiving chamber 323.

[0086] It is understandable that some heat is radiated outward due to heat radiation the heat-conducting member 321 and the heating member 322, and a direction of the radiated heat is opposite the heat transferred to the receiving chamber 323. Therefore, the radiated heat cannot be fully utilized by the receiving chamber 323 or absorbed by the aerosol-generating article, resulting in heat energy loss and increasing consumption of the power supply assembly 200.

[0087] In order to solve the above problems, the present disclosure provides a reflecting member 330 at an outer side the heat-conducting member 321. The reflecting member 330 can reflect the heat received by itself back in an opposite direction, that is, the outward heat radiation from the heat-conducting member 321 is reflected to the heat-conducting member 321, and finally transferred to the aerosol-generating article through the heat-conducting member 321. Similarly, the outward heat radiation from the heating member 322 is reflected back to the heating member 322, and finally transferred to the aerosol-generating article through the heat-conducting member 321, thereby reducing heat energy loss caused by heat radiation, improving heat utilization rate, lowering power consumption of the power supply assembly 200, and reducing operating costs of a vaporizing device incorporating an aerosol-generating apparatus.

[0088] With the gas flow channel 324, external air entering the receiving chamber 323 can be heated to form hot gas flow, which flows into the interior of the aerosol-generating article heat the gas flow. The aerosol-generating article is also inserted in the receiving chamber 323 and heated by heat conduction through the heat-conducting member 321. Heating through heat conduction and gas flow heating can improve heating efficiency, and effectively ensure that the aerosol-generating article is heated evenly.

[0089] Since the heating member 322, as a heat source, is disposed at an end of the heat-conducting member 321, and is disposed at an end portion of the aerosol-generating article (loaded with the aerosol-generating article) according to the structural characteristics in an operating state of the vaporizing device, heat at the end portion of the aerosol-generating article can be improved to accelerate a speed of aerosol generation, and a temperature near a gas outlet 311 can be reduced to avoid burning the user.

[0090] In some embodiments, the heat-conducting member 321 is made of a material with a high thermal conductivity and capable of being transparent to infrared radiation, such as aluminum nitride, silicon carbide, or aluminum oxide. Preferably, the heat-conducting member 321 has a thermal conductivity greater than 15 W / (m•K) and an emissivity greater than 0.5. The heat-conducting member 321 can sufficiently absorb heat from the heating member 322, as well as radiation heat reflected by the reflecting member 330, thereby improving heat utilization rate of the vaporizing device.

[0091] In some embodiments, the reflecting member 330 is made of a material with high thermal conductivity and low emissivity, such as aluminum alloy or silver. Preferably, the reflecting member 330 has a thermal conductivity greater than 15 W / (m•K) and an emissivity smaller than 0.3. The low emissivity can raise an internal temperature of the reflecting member 330, such that more heat is transferred to the aerosol-generating article, and the heat utilization rate of the vaporizing device is further improved.

[0092] In some embodiments, the heating member 322 is made of a material with a high thermal conductivity, such as aluminum alloy, aluminum nitride, silicon carbide, aluminum oxide, or stainless steel. Preferably, the heating member 322 has a thermal conductivity greater than 15 W / (m•K)and can transfer more heat to the heat-conducting member 321 or the receiving chamber 323, such that more heat can be transferred to the aerosol-generating article to improve the heat utilization rate of the vaporizing device.

[0093] In some embodiments, the heat-conducting member 321 and the reflecting member 330 are arranged in a non-contact structure, such that a gap is formed between the heat-conducting member 321 and the reflecting member 330, the heat absorbed by the heat-conducting member 321 can only be transferred to the reflecting member 330 by heat radiation, the reflecting member 330 can reflect the heat back to the heat-conducting member 321. Based on this, heat loss caused by heat radiation can be effectively reduced, and the heat generated by the heating member 322 can be maximized for heating the aerosol-generating article, thereby improving the heat utilization rate.

[0094] In some embodiments, a surface of the reflecting member 330 facing the heat-conducting member 321 (also referred to as an inner surface of the reflecting member 330) is configured as a smooth surface. Mirror reflection of the smooth surface can effectively improve the heat reflection performance of the reflecting member 330, such that more heat radiated by the heat-conducting member 321 and / or the heating member 322 is reflected back to reduce heat loss at the reflecting member 330.

[0095] Of course, in some other embodiments, the reflecting member 330 may also include a reflective film or a reflective layer disposed facing the heat-conducting member 321. Both the reflective film and the reflective layer may be made of a material with high reflectivity. For example, the reflective layer may be formed by coating a material with high reflectivity on an inner surface.

[0096] Referring to FIG. 27, in some embodiments, the heating member 322 includes a heat transfer portion 3221 and a heating portion 3222. The heating portion 3222 and a limiting member 3213 are disposed on opposite sides of the heat transfer portion 3221. At least part of the heat transfer portion 3221 is connected to the heat-conducting member 321, thereby increasing a contact area and improving heat transfer efficiency, finally improving the heat utilization rate.

[0097] In some embodiments, the heating portion 3222 is configured as a heating area, a heating film, or a heating circuit 3223 disposed on the heat transfer portion 3221. As shown in FIG. 27, the heating portion 3222 is the heating circuit 3223 disposed on the heat transfer portion 3221. In order to reduce heat at the end portion of the aerosol-generating article, the heating portion 3222 is disposed on a side surface of the heat transfer portion 3221 away from the receiving chamber 323.

[0098] In some embodiments, the heating area, the heating film, or the heating circuit 3223 is made of a resistive material, and may be fixed to the heat transfer portion 3221 by coating, embedding, or bonding.

[0099] In some embodiments, the heat-conducting member 321 and the heating member 322 are integrally formed as an integral structure, which can simplify the assembly process, improve assembly efficiency, and ensure effective contact between the heat-conducting member 321 and the heating member 322, thereby improving the thermal conductivity.

[0100] In some embodiments, the reflecting member 330 extends in an axial direction of the heat-conducting member 321, and one end of the reflecting member away from the gas outlet 311 abuts against a portion of the heating member 322. The reflecting member 330 reflects heat radiation emitted outward from the heat-conducting member 321 in an opposite direction, such that the heat passes through the heat-conducting member 321 and acts on the gas inside the receiving chamber 323 or on the aerosol-generating article.

[0101] In some other embodiments, referring to FIG. 26, the reflecting member 330 includes a first reflective portion 331 and a second reflective portion 332. The first reflective portion 331 is coaxially arranged with the heat-conducting member 321 and is arranged around an outer side of the heat-conducting member 321. The second reflective portion 332 is connected to the first reflective portion 331 and is arranged outside the heating member 322. The first reflective portion 331 is configured to reflect heat radiation emitted outward from the heat-conducting member 321, and the second reflective portion 332 is configured to reflect heat radiation emitted outward from the heating member 322. The arrangement of the first reflective portion 331 and the second reflective portion 332 can improve heat reflection efficiency, thereby reducing heat loss.

[0102] In some embodiments, referring to FIG. 27, a plurality of recesses 3211 (corresponding to the main body portion) are arranged on an inner wall of the heat-conducting member 321. The plurality of recesses 3211 are evenly spaced around a center of the heat-conducting member 321 to form a flow guide groove (also referred to as a first ventilation section). A protruding portion 3212 is formed between adjacent recesses 3211. The protruding portions 3212 are configured to abut against an outer wall surface of the aerosol-generating article, thereby snap-fitting and fixing the aerosol-generating article. The protruding portions 3212 are also evenly arranged, it is convenient to place the aerosol-generating article in a center (it may be understood as being coaxially arranged with the receiving chamber 323), such that the gas flow around the aerosol-generating article is uniformed to realize uniform heating of the aerosol-generating article. A limiting member 3213 is disposed on the inner wall of the heat-conducting member 321 or on the heating member 322. The limiting member 3213 is configured to abut against the end portion of the aerosol-generating article to form a clearance (also referred to as a second ventilation section) between the heating member 322 and the aerosol-generating article. The formation of the clearance can also keep the end portion of the aerosol-generating article away from the heat source (i.e., the heating member 322), thereby preventing the end portion of the aerosol-generating article from generating unwanted gas and affecting the aerosol due to excessive temperature. A number of the limiting members 3213 may be one or more. When more than one limiting member 3213 is arranged, the limiting members 3213 may be spaced apart from one another, such that a gap for gas passing through is formed between two adjacent limiting members 3213 (the gasp is formed between the limiting members 3213 and is different the above clearance). The flow guide groove is in fluid communication with the clearance through the gap between the two adjacent limiting members 3213. In order to make the gas flow uniform, the limiting members 3213 are also arranged evenly around the center of the receiving chamber 323.

[0103] In some embodiments, in order to further reduce heat loss, the mounting frame assembly 310a is made of a material having low thermal conductivity and high heat resistance, such as polyetheretherketone (PEEK), which cannot only minimize heat loss at the mounting frame assembly 310a, but also prevent structural failure of the mounting frame assembly 310a caused by high temperatures, thereby extending the service life of the vaporizing device.

[0104] Referring to FIGs. 28-30, in some embodiments, the heating assembly 101a further includes a connecting assembly 40. The connecting assembly 40 is connected between the mounting frame assembly 10b and an end of the heating element 20b having the opening 212b (corresponding to the port in the foregoing embodiments), such that the heating element 20b is suspended inside the mounting frame assembly 10b. A gap 50 is formed between the heating element 20b and the mounting frame assembly 10b. Specifically, the mounting frame assembly 10b includes a sleeve 11a and a base 12a, and the sleeve 11a includes a first cylinder body 111band a second cylinder body 112b. The connecting assembly 40 is connected between an inner wall of the sleeve 11a and an end of the heating element base having the opening 212b. In this way, on the one hand, a contact area between the heating element base and the mounting frame assembly 10b is reduced, thereby reducing heat energy loss; on the other hand, a gap 50 is formed between the heating element base and the mounting frame assembly 10b, and the gap 50 is filled with gas flow, such that the heat energy loss is further reduced due to poor thermal conductivity of the gas flow.

[0105] In one embodiment, a width of the gap 50 is greater than or equal to 0.3 mm. In specific implementation, the width of the gap 50 may be set to 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, and the like.

[0106] The connecting assembly 40 includes a first connecting member 41 (corresponding to the first inwardly recessed tube 212 in FIGs. 3-4) and a second connecting member 42 (corresponding to the second inwardly recessed tube 222 in FIGs. 3-4). The first connecting member 41 is connected to one end or an inner side of the first cylinder body 111b and extends into the second cylinder body 112b. The second connecting member 42 is connected to one end or an inner side of the second cylinder body 112b. The heating element 20b is connected between the first connecting member 41 and the second connecting member 42, and is suspended inside the second cylinder body 112b. The suspended configuration of the heating element 20b is conducive to reducing heat energy loss. In specific implementation, the end of the heating element base having the opening 212b is connected between the first connecting member 41 and the second connecting member 42.

[0107] In one embodiment, the reflecting member 30a is coated on an inner surface of the mounting frame assembly 10b. More specifically, the reflecting member 30a is coated on the inner side of the second cylinder body 112b and the side of the base 12a facing the accommodating space 13a. Of course, in specific application, as one alternative embodiment, the reflecting member 30a may also be coated on an outer surface of the heating element 20b. It should be noted that in this alternative embodiment, the heating member is sandwiched between the heating element base and the reflecting member 30a. As another alternative embodiment, the reflecting member 30a may be coated on both the inner surface of the mounting frame assembly 10b and the outer surface of the heating element 20b, or the gap 50 between the heating element 20b and the mounting frame assembly 10b may be omitted, with the reflecting member 30a sandwiched between the heating element 20b and the mounting frame assembly 10b.

[0108] In some embodiments, a thickness of the reflecting member 30a is less than or equal to 0.2 mm, thereby saving material and reducing costs. Specifically, the thickness of the reflecting member 30a may be 0.08 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.18 mm, 0.2 mm, and the like.

[0109] In some embodiments, the reflecting member 30a is a reflective heat-insulating film made of a low-emissivity material, to improve the performance of the reflecting member 30a in reflecting thermal radiation. The reflecting member 30a includes any one of an aluminum layer, a silver layer, a stainless steel layer, or a ceramic layer.

[0110] By arranging the reflective heat-insulating layer 30 between the heating element 20b and the mounting frame assembly 10b and configuring the reflecting member 30a to surround the outer surface of the heating element 20b, the aerosol-generating apparatus provided in the embodiments of the present disclosure is conducive to improving the heat insulation effect of the aerosol-generating apparatus, reducing the cost of the aerosol-generating apparatus, and avoiding an excessive volume of the aerosol-generating apparatus.

[0111] The present disclosure is described above with specific examples, which are only used to facilitate understanding of the present disclosure, and are not intended to limit the present disclosure. Those skilled in the art to which the present disclosure belongs can make several simple deductions, variations or substitutions according to the ideas of the present disclosure.

Claims

1. A heating assembly, comprising a heating element, wherein the heating element comprises a heating element base and a heating circuit; the heating element base comprises a main body portion and a bottom wall, wherein the bottom wall is disposed on an end of the main body portion, the main body portion and the bottom wall enclose to form a receiving chamber, and the receiving chamber is configured to accommodate an aerosol-generating article; and an end of the receiving chamber away from the bottom wall is provided with a port, the port is in fluid communication with the receiving chamber, and the port is configured to enable the aerosol-generating article to be inserted into and removed from the receiving chamber; and the heating circuit is configured to generate heat after being energized, and the heating circuit is disposed on the bottom wall.

2. The heating assembly according to claim 1, wherein the heating element base is provided with a plurality of flow guide grooves, the plurality of flow guide grooves are arranged on a side of the heating element base facing the receiving chamber, and are in fluid communication with the port; and the port is configured to enable the aerosol-generating article to pass through to be inserted into and removed from the receiving chamber, and the flow guide grooves are configured to guide gas from the port to an end portion of the aerosol-generating article; the main body portion is a tubular structure having a first end and a second end disposed opposite each other, the port is formed at the first end of the main body portion, and the bottom wall is connected to the second end of the main body portion; and the flow guide grooves are formed on the main body portion.

3. The heating assembly according to claim 2, wherein a limiting member is disposed on a side of the bottom wall facing the receiving chamber, and the limiting member is configured to abut against the end portion of the aerosol-generating article; and a gap is formed between the aerosol-generating article and the bottom wall when the aerosol-generating article is inserted into the receiving chamber; ends of the flow guide grooves away from the port are in fluid communication with the gap, and the gap and the flow guide grooves are configured to form gas flow channels.

4. The heating assembly according to claim 2, wherein a plurality of recesses are arranged on an inner wall of the main body portion, and the plurality of recesses are evenly spaced around a center of the main body portion to form the flow guide grooves.

5. The heating assembly according to claim 2, further comprising a mounting frame assembly, wherein the heating element base is suspended inside the mounting frame assembly; and the heating element base is provided with a connecting portion, and the connecting portion is connected to the mounting frame assembly.

6. The heating assembly according to claim 5, wherein a first gas intake channel in fluid communication with an external environment is disposed in the mounting frame assembly, a second gas intake channel is disposed in the receiving chamber, and the first gas intake channel is in fluid communication with the second gas intake channel; and the second gas intake channel comprises the flow guide grooves and the gap.

7. The heating assembly according to claim 1, wherein the heating circuit is disposed on a side of the bottom wall away from the receiving chamber.

8. The heating assembly according to claim 1, further comprising a cover body, wherein the cover body is disposed on the side of the bottom wall away from the receiving chamber, and the heating circuit is disposed between the cover body and the bottom wall, and is at least co-fired with the cover body into an integral unit.

9. The heating assembly according to claim 8, wherein the fixing cavity is formed surrounding the side of the bottom wall away from the receiving chamber; and the heating circuit and the cover body are co-fired to form a co-fired ceramic member, and the co-fired ceramic member is fixed in the fixing cavity.

10. The heating assembly according to claim 1, further comprising a heat-conducting member, wherein the heat-conducting member is disposed on the bottom wall and is connected to the bottom wall and the heating circuit to fix the heating circuit to the bottom wall.

11. The heating assembly according to claim 1, further comprising a mounting frame assembly and a reflecting member, wherein the heating element base is disposed in the mounting frame assembly, and the reflecting member is arranged between the heating element base and the mounting frame assembly.

12. The heating assembly according to claim 11, wherein a thickness of the reflecting member is less than or equal to 0.2 mm; and / or the reflecting member is a reflective heat-insulating film made of a low-emissivity material.

13. A heating assembly, comprising a mounting frame assembly, a heat-conducting member, a heating member and a reflecting member, wherein a gas intake is formed on the mounting frame assembly, and the heat-conducting member and the heating member are arranged in the mounting frame assembly; the heat-conducting member is a hollow structure with openings at both ends, the heating member is disposed at the opening of the heat-conducting member away from the gas intake, and cooperates with the heat-conducting member to define a receiving chamber configured to an aerosol-generating article, and a gas flow channel is formed in the receiving chamber and is in fluid communication with the gas intake and an interior of the aerosol-generating article; the heating member is configured to generate heat when being energized, and the heat-conducting member is configured to absorb at least a portion of the heat generated by the heating member and transfer at least a portion of the absorbed heat to the receiving chamber; and the reflecting member is disposed in the mounting frame assembly and on an outer side of the heat-conducting member, and the reflecting member is configured to reflect heat radiated outward by the heat-conducting member and / or the heating member.

14. The heating assembly according to claim 13, wherein the heating member comprises a heat transfer portion and a heating portion, wherein the heating portion is configured as a heating area, a heating film, or a heating circuit disposed on the heat transfer portion, and at least part of the heat transfer portion is connected to the heat-conducting member.

15. An aerosol-generating apparatus, comprising a power supply assembly and the heating assembly of any one of claims 1-12 or the heating assembly of claim 13 or 14, wherein the power supply assembly is configured to supply power to the heating assembly.

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