Aerosol-generating device and heating arrangement therefor

Abstract

An aerosol-generating device (100) and a heating arrangement (20) thereof, the heating arrangement (20) configured for heating an aerosol-generating article (10) inserted into the aerosol-generating device (100) to generate an aerosol, the heating arrangement (20) comprising a first wall (201) comprising a heating component (21), an inner diameter of a hollow accommodation portion of the heating component (21) being set to be greater than an outer diameter of an aerosol-forming substrate (11) of the aerosol-generating article (10) to be inserted, so that a first air passage (51) is formed between the heating component (21) and the aerosol-forming substrate (11); a second wall (202) comprising a first clamping component (251) having an air passage channel, the second wall (202) being provided with a first air passage hole (71) extending through the second wall (202); and a third wall (203) disposed between the first wall (201) and the second wall (202), the third wall (203) comprising a second clamping component (253) provided substantially in a cylindrical shape, and an inner diameter of the second clamping component (253) being substantially equal to an outer diameter of the aerosol-generating article (10).

Description

Technical Field

[0001] This application relates to the field of electronic cigarette technology, and in particular, this disclosure relates to aerosol generating equipment and its heating device. Background Technology

[0002] This section provides background information relating to this disclosure, but such information does not necessarily constitute prior art.

[0003] Currently, with the widespread use of electronic products in cigarette technology, various heating devices for aerosol generation equipment are available. The main principle of these devices is to heat the aerosol-generating product using heating elements to produce an aerosol for inhalation. Currently, aerosol generation equipment typically uses either tubular peripheral heating or center-embedded heating. Tubular peripheral heating refers to heating tubes surrounding the outside of the aerosol-generating product. Tubular heating devices can achieve high temperatures during actual operation. When a user holds and inhales from the aerosol-generating device, the high internal temperature is transferred to the outer shell, resulting in a hot touch. Furthermore, the residual heat from the heating elements inside existing aerosol-generating devices dissipates through the shell, leading to poor heat utilization and reduced heating efficiency, thus decreasing aerosol generation efficiency.

[0004] In related technologies, center-embedded heating refers to a heating device inserted into and in close contact with the aerosol-generating article to heat it, thereby causing the aerosol-generating article to release various volatile compounds. Because this heating device is in direct contact with the aerosol-generating article, exudates such as fumes generated by the aerosol-generating article inevitably contaminate the heating device during the heating process, affecting its heating efficiency and service life. For example, patent application CN104010531A discloses a heating component inserted into an aerosol-generating article to heat it, with the heating component in direct contact with the aerosol-generating article. Furthermore, in another related technology, a heating device is positioned at the bottom of the aerosol-generating article, using hot air to centrally heat the bottom. This results in overheating of the bottom of the aerosol-generating article while underheating the opposite end, leading to uneven heating. Summary of the Invention

[0005] This section provides a general overview of this disclosure, rather than a full disclosure of its entire scope or all its features.

[0006] The inventors of this application have discovered that existing methods of heating aerosol-generating products using tubular peripheral heating or center-embedded heating result in low aerosol generation efficiency. In particular, for center-embedded heating, since the heating device is in direct contact with the aerosol-generating product, the exudates such as fumes and oils generated by the aerosol-generating product inevitably contaminate the heating device during the heating process, affecting the heating efficiency and service life of the heating device.

[0007] Therefore, there is a need to improve the heating device used in aerosol generation equipment to overcome or alleviate all or at least some of the above-mentioned technical problems.

[0008] An exemplary embodiment of this disclosure provides a heating device for an aerosol generation apparatus, which can be configured to heat an aerosol generation article inserted into the aerosol generation apparatus to generate an aerosol, the aerosol generation article including an aerosol forming matrix.

[0009] The heating device may include: a first wall, the first wall including a heating element configured to have a hollow cylindrical shape to form a hollow receiving portion, the hollow receiving portion being configured to receive an aerosol-forming matrix of an aerosol-generating article, the inner diameter of the hollow receiving portion of the heating element being set larger than the outer diameter of the aerosol-forming matrix of the aerosol-generating article to be inserted, so as to form a first air channel between the heating element and the aerosol-forming matrix; a second wall, the second wall being coaxially arranged with the first wall along a longitudinal axis, the second wall including a first clamping element configured to clamp an aerosol-generating article inserted into the aerosol-generating device and having a venting channel, the second wall being provided with a first venting hole penetrating the second wall; and a third wall, the third wall being disposed between the first wall and the second wall, the third wall including a second clamping element, the second clamping element being cylindrical, and the inner diameter of the second clamping portion being equal to the outer diameter of the aerosol-generating article.

[0010] According to the heating device for aerosol generation equipment disclosed herein, the heating device and the aerosol forming matrix of the aerosol generation product are spaced apart from each other and form a first air channel. Since the heating device does not directly contact the aerosol forming matrix, it effectively avoids contamination of the heating device by fumes and other exudates generated during the heating process, achieving zero cleaning of the heating device, improving the heating efficiency of the heating device and extending its service life.

[0011] In some exemplary embodiments, the heating device further includes a housing that extends along a longitudinal axis and has a longitudinally extending cavity formed inside the housing. The longitudinally extending cavity is configured to receive at least a portion of a first wall, a second wall, and a third wall of the heating device. The housing is disposed around the heating element to form a second air passage between the housing and the heating element.

[0012] In the heating apparatus according to an exemplary embodiment of this disclosure, the heating apparatus forms a unique airflow path including a first air channel and a second air channel, achieving uniform and efficient heating of the aerosol forming matrix. Specifically, the heated hot air in the first air channel can fully preheat the aerosol forming matrix, and the heated hot air in the second air channel merges with the heated hot air in the first air channel at the bottom of the aerosol forming article, and enters the aerosol forming matrix from the distal end of the aerosol forming matrix. The two hot air streams together efficiently heat the aerosol forming matrix, that is, the aerosol forming matrix is ​​heated from the periphery and bottom of the aerosol forming matrix by heated hot air.

[0013] In some exemplary embodiments, the first clamping member has an insertion port for receiving an aerosol-generated article and a plurality of protrusions are provided on an inner surface adjacent to the insertion port, the plurality of protrusions being spaced apart from each other in the circumferential direction and forming ventilation channels between adjacent protrusions.

[0014] In the heating apparatus according to an exemplary embodiment of the present disclosure, during the process of a user drawing aerosol to generate an article, ambient air enters the heating apparatus from the insertion port of the first clamping member via a ventilation channel. The insertion port of the first clamping member can act as an air inlet, providing sufficient and uniform air intake.

[0015] In some exemplary embodiments, a plurality of protrusions extend from the inner surface of the first clamping member toward the longitudinal axis, and the plurality of protrusions are configured to contact the outer surface of the aerosol-generating article.

[0016] In some exemplary embodiments, the second wall includes a tapered portion connected to the third wall, and one or more first vent holes are provided in the tapered portion, the first vent holes being configured to be arranged along the circumferential direction of the tapered portion to allow airflow from the venting channel of the first clamping member through the first vent holes into the second air passage.

[0017] In the heating device according to an exemplary embodiment of the present disclosure, ambient air enters the venting channel of the first clamping member through the insertion port of the first clamping member, and the incoming airflow enters the second air channel through the venting channel via a first vent provided on the tapered portion. When the heating member of the heating device is energized and heats up, the temperature of the airflow entering the second air channel rises, thereby forming a hot airflow.

[0018] In some exemplary embodiments, the first wall includes a proximal end of the first wall adjacent to the third wall and a distal end of the first wall opposite to the proximal end of the first wall, the distal end of the first wall being provided with an opening.

[0019] In some exemplary embodiments, the first wall includes one or more second vents, which are configured to penetrate a portion of the first wall adjacent to a proximal end of the first wall, and are arranged along a circumferential direction.

[0020] When the heating element of the heating device is energized and heats up, the air in the first air channel is heated to fully heat the aerosol forming matrix. The heated air in the second air channel merges with the heated air in the first air channel at the far end of the first wall through an opening located at the far end of the first wall. The two streams of hot air enter the aerosol forming matrix together from the far end of the aerosol forming matrix, efficiently heating the aerosol forming matrix. This achieves uniform heating of the aerosol forming matrix from the periphery and bottom using hot air streams, maximizing the overall heating of the aerosol forming matrix and improving the heat storage effect of the heating device.

[0021] In addition, during the user's suction of the aerosol-generating product, ambient air is continuously supplied through the second air channel of the heating device, which further reduces the heat conducted to the outer shell of the aerosol-generating equipment, effectively achieving heat insulation and cooling of the outer shell of the aerosol-generating equipment and improving the user experience.

[0022] In some exemplary embodiments, the heating element may be configured to include a first material portion disposed radially inward and a second material portion disposed around the first material portion.

[0023] In some exemplary embodiments, the heating element is configured to include a cylindrical ceramic body and metal wires disposed around the ceramic body. Optionally, the metal wires extend in a helical manner around the outer peripheral surface of the ceramic body.

[0024] By using heating components that include a ceramic body and metal wires, the thermal conductivity of the heating device can be improved, giving it advantages such as good heat preservation, strong mechanical properties, corrosion resistance, and resistance to magnetic fields.

[0025] In some exemplary embodiments, the heating element may be configured to include one of the following components: a first heating portion including one or more first concave portions or first convex portions extending in a longitudinal direction on the outer surface of the first heating portion; a second heating portion including one or more second concave portions or second convex portions extending in a circumferential direction on the outer surface of the second heating portion; a third heating portion including one or more third concave portions or third convex portions extending in a meandering manner in a circumferential direction on the outer surface of the third heating portion; a fourth heating portion including one or more longitudinal concave portions or longitudinal convex portions extending in a longitudinal direction on the outer surface of the fourth heating portion; and one or more circumferential concave portions or circumferential convex portions extending in a circumferential direction on the outer surface of the fourth heating portion; and a fifth heating portion including one or more longitudinal concave portions or longitudinal convex portions extending in a meandering manner in a longitudinal direction on the outer surface of the fifth heating portion; and one or more circumferential concave portions or circumferential convex portions extending in a meandering manner in a circumferential direction on the outer surface of the fifth heating portion.

[0026] By designing the heating element with a textured pattern, the heating device becomes more compact, effectively increasing the heat transfer area per unit volume of the heating element and thus improving the heat transfer efficiency of the heating device.

[0027] In some exemplary embodiments, this disclosure provides an aerosol generating apparatus comprising: one or more heating devices, at least one of which is the heating device described above; a power supply device configured to be electrically connected to the heating device and supply power to the heating device; and a controller configured to control the power supplied from the power supply device to the heating device.

[0028] According to the exemplary embodiment of the aerosol generating apparatus of this disclosure, the heating device and the aerosol forming matrix of the aerosol generated article are spaced apart from each other and form a first air channel. Since the heating device does not directly contact the aerosol forming matrix, contamination of the heating device by exudates such as fumes generated during heating is effectively avoided, achieving zero cleaning of the heating device, improving its heating efficiency, and extending its service life. Furthermore, the unique airflow heat path formed by the first and second air channels achieves uniform and efficient heating of the aerosol forming matrix, enabling the heating device to efficiently utilize thermal energy and save electricity. In addition, when using the aerosol generating apparatus, the aerosol forming matrix has high atomization efficiency, and the outer shell of the aerosol generating apparatus does not easily overheat, significantly improving the user experience. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figures 1 to 3 Here are schematic longitudinal cross-sectional views, schematic perspective views, and schematic side views of a heating device according to an exemplary embodiment of the present disclosure;

[0031] Figure 4 This is a schematic perspective view of a heating device according to another exemplary embodiment of the present disclosure, wherein,

[0032] The cigarette is inserted into the heating device;

[0033] Figure 5 for Figure 4 A schematic longitudinal cross-sectional view of the heating device shown;

[0034] Figure 6 A schematic cross-sectional view of a cigarette according to an exemplary embodiment of the present disclosure;

[0035] Figure 7 A schematic side view of a heating device according to another embodiment of the present disclosure;

[0036] Figure 8 This is a schematic perspective view of the first heating section of a heating apparatus according to an exemplary embodiment of the present disclosure;

[0037] Figure 9 This is a schematic perspective view of the second heating section of a heating apparatus according to an exemplary embodiment of the present disclosure;

[0038] Figure 10 and Figure 11 A schematic perspective view and a schematic side view of a third heating section of a heating apparatus according to an exemplary embodiment of the present disclosure;

[0039] Figure 12 This is a schematic perspective view of the fourth heating section of a heating apparatus according to an exemplary embodiment of the present disclosure;

[0040] Figure 13 and Figure 14 A schematic perspective view and a schematic side view of the fifth heating section of a heating apparatus according to an exemplary embodiment of the present disclosure; and

[0041] Figure 15This is a schematic perspective view of an aerosol generating apparatus according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0042] The present disclosure will now be described in detail with reference to the accompanying drawings and exemplary embodiments. It should be noted that the exemplary embodiments of the present disclosure are intended to enable those skilled in the art to readily implement the disclosure, and the various embodiments of the present disclosure can be implemented in many different forms and should not be construed as limited to the embodiments set forth in the present disclosure. Accordingly, the following detailed description of the present disclosure is for illustrative purposes only and is not intended to limit the present disclosure. Furthermore, the same reference numerals are used in the various drawings to denote the same parts.

[0043] In the description of the application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through intermediate elements; they can refer to the internal communication of two elements or the interaction between two elements, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate element. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] It should also be noted that, for clarity, not all features of the actual specific embodiments are described and shown in the specification and drawings. Furthermore, in order to avoid unnecessary details obscuring the technical solutions of this disclosure, only the device structures closely related to the technical solutions of this disclosure are described and shown in the drawings and specification, while other details that are not closely related to the technical content of this disclosure and are known to those skilled in the art are omitted.

[0048] Next, we will refer to Figures 1 to 3 A heating apparatus according to an exemplary embodiment of the present disclosure will be described. The heating apparatus 20 is configured to heat an aerosol generating article inserted into an aerosol generating device to generate an aerosol.

[0049] The heating device 20 may include a first wall 201, which includes a heating element 21 configured to have a hollow cylindrical shape to form a hollow receiving portion, the hollow receiving portion being configured for heating the aerosol generating article 10 (e.g., a cigarette cartridge or...). Figure 5The aerosol forming matrix 11 of the cigarette shown is accommodated, and the inner diameter of the hollow accommodating portion of the heating element 21 is set to be larger than the outer diameter of the aerosol forming matrix 11 of the aerosol generating article 10 to be inserted, so as to form a first air channel 51 between the heating element 21 and the aerosol forming matrix 11; and a second wall 202, the second wall 202 and the first wall 201 are arranged coaxially with each other along the longitudinal axis AA, the second wall 202 includes a first clamping member 251, the first clamping member 251... The first wall 201 is configured to clamp the aerosol-generating article 10 inserted into the aerosol-generating device and has a ventilation channel. The second wall 202 has a first ventilation hole 71 penetrating through it. A third wall 203 is disposed between the first wall 201 and the second wall 202. The third wall 203 includes a second clamping member 253, which is generally cylindrical, and its inner diameter is substantially equal to the outer diameter of the aerosol-generating article 10. In this application, the third wall 203 may be a part of the first wall 201 or the second wall 202. The location of the third wall 203 can be understood as a "waist" portion.

[0050] The first clamping member 251 and the second clamping member 253 are configured to clamp the aerosol generation article 10 inserted into the aerosol generation device, thereby fixing the aerosol forming matrix 11 of the aerosol generation article 10 in alignment with the hollow receiving portion of the heating member 21. In other words, the first clamping member 251 and the second clamping member 253 are configured to fix the aerosol forming matrix 11 in place during use, thereby arranging the heating member 21 around the aerosol forming matrix 11 to heat the aerosol forming matrix 11 in the circumferential direction.

[0051] The following is combined with Figures 4 to 6 Provide a description of aerosol-generating products (such as cigarettes). Figure 6 As shown, the cigarette includes an aerosol forming matrix 11, a support portion 13, a cooling portion 15, and a filter portion 17. The aerosol forming matrix 11, support portion 13, cooling portion 15, and filter portion 17 are packaged in a packaging unit 19. Figure 5 As shown, when the aerosol forming matrix 11 of the cigarette is fully inserted into the heating device 20 of the aerosol generating apparatus, the aerosol forming matrix 11 is located inside the aerosol generating apparatus, and at least a portion of the cooling section 15 can be exposed to the aerosol generating apparatus 100 (see [reference]). Figure 15The user can inhale the aerosol through the filter portion 17. When the aerosol forming matrix 11 is heated by the heating device 20, the aerosol forming matrix 11 generates aerosol, and the generated aerosol can be transported to the user's mouth along with the air introduced into the cigarette through the support portion 13, the cooling portion 15, and the filter portion 17.

[0052] In one example, the aerosol-forming matrix 11 of the cigarette may include aerosol-generating materials and / or tobacco materials including nicotine. When the aerosol-forming matrix 11 is heated to a suitable temperature (e.g., 180°C to 400°C), an aerosol is generated for the user to inhale.

[0053] Aerosol-generating materials may include, but are not limited to, glycerol, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol. Additionally, the aerosol-forming matrix 11 may contain other additives such as flavoring agents, wetting agents, and / or organic acids. Furthermore, tobacco materials may be formed, for example, from tobacco sheets or tobacco strips. Tobacco materials may include corrugated tobacco sheets, curled tobacco sheets, etc.

[0054] When a cigarette is inserted into the aerosol generating device, the aerosol forming matrix 11 can be fixed in such a way that it is surrounded by the heating element 21 of the heating device 20. The heating element 21 generates heat when electrically connected to the power supply device and evenly transfers the heat to the aerosol forming matrix 11, thereby raising the temperature of the aerosol forming matrix 11 and generating aerosol.

[0055] The support portion 13 may include aerosol generating materials and / or tobacco materials, or the support portion 13 may simply serve as a spacer.

[0056] The cooling section 15 can be made of a polymeric material or a biodegradable polymeric material and can have a cooling function. For example, the cooling section 15 can be made of pure polylactic acid, but is not limited thereto. For example, the cooling section 15 can be made of a cellulose acetate filter with multiple pores. However, the cooling section 15 is not limited to the examples above, as long as the cooling section 15 is capable of cooling aerosols. For example, the cooling section 15 may include a tubular filter.

[0057] The filter tip portion 17 can be a cellulose acetate filter. Furthermore, the shape of the filter tip portion 17 is not limited. For example, the filter tip portion 17 can be a cylindrical rod with an internal hollow interior. Additionally, in some examples, the filter tip portion 17 can consist of multiple segments, at least one of which can be manufactured in a different shape.

[0058] The cigarette can be packaged in a package 19. The package 19 may have at least one opening through which outside air flows in or out. Figure 6 In this context, package 19 is shown as a single package. However, in some examples, package 19 may include multiple packages.

[0059] like Figure 5 As shown, the inner diameter of the hollow accommodating portion of the heating element 21 can be set to be larger than the outer diameter of the aerosol forming matrix 11 of the cigarette to be inserted, so that a first air channel 51 is formed between the heating element 21 and the aerosol forming matrix 11 when the cigarette is inserted into the aerosol generating device.

[0060] The heating device 20 and the aerosol forming matrix 11 of the aerosol generating product 10 are spaced apart from each other. Since the heating device 20 does not come into direct contact with the aerosol forming matrix 11, it effectively avoids contamination of the heating device 20 by the fumes and oils generated during the heating process, achieving zero cleaning of the heating device 20, improving the heating efficiency of the heating device 20 and extending its service life.

[0061] Furthermore, in some exemplary embodiments, the heating device 20 may include a housing 24, such as Figure 5 As shown, the housing 24 extends along the longitudinal axis AA and has a longitudinally extending cavity formed inside it. The longitudinally extending cavity is configured to accommodate a portion of the first wall 201, the second wall 202, and the third wall 203 of the heating device 20. The housing 24 is disposed around the heating element 21 to form a second air passage 52 between the housing 24 and the heating element 21. In this application, the housing 24 can be the outer shell of the heating device 20 or the outer shell of an aerosol generating device.

[0062] exist Figure 2 and Figure 5 In the illustrated embodiment, the second wall 202 of the heating device 20 may include a first clamping member 251 and a tapered portion 252, and the third wall 203 may include a second clamping member 253. In some examples, the first clamping member 251, the tapered portion 252, and the second clamping member 253 may be formed as a single piece. In other examples, the first clamping member 251, the tapered portion 252, and the second clamping member 253 may be formed as separate components. The tapered portion 252 is disposed between the first clamping member 251 and the second clamping member 253. The first clamping member 251 has an insertion port for receiving the aerosol generating article 10 and a plurality of protrusions 70 are provided on the inner surface adjacent to the insertion port. The plurality of protrusions 70 are spaced apart from each other in the circumferential direction, and ventilation channels are formed between adjacent protrusions. The second clamping member 253 may be configured to be generally cylindrical, and the inner diameter of the second clamping member 253 is substantially equal to the outer diameter of the aerosol generating article 10.

[0063] Optionally, such as Figure 2 As shown, the inner surface of the first clamping member 251 adjacent to the insertion port is provided with a plurality of protruding ribs, which can make close contact with the cigarette, and the inner surface of the second clamping member 253 can make close contact with the outer surface of the cigarette to fix the cigarette in place. The insertion port of the first clamping member 251 can be formed in a funnel shape to allow sufficient supply of ambient air. In one example, the protrusion 70 can be configured to extend radially from the inner surface of the first clamping member 251 toward the longitudinal axis AA to clamp the cigarette in place in the circumferential direction. The first clamping member 251 and the second clamping member 253 of this disclosure are not limited to the configuration of the clamping members described herein, as long as the clamping members can fix the cigarette in a suitable position.

[0064] In some exemplary embodiments, the second wall 202 and the third wall 203 may be formed as a single unit, and the first wall 201 may be detachably connected to the second wall 202 and the third wall 203. The first wall 201 and the third wall 203 may be connected by one of the following methods: snap-fit ​​connection, adhesive connection, threaded connection, etc. In other examples, the second wall 202 and the third wall 203 may be detachably connected.

[0065] It should be understood that the cigarette includes a proximal end and a distal end, through which the aerosol generated by the aerosol forming matrix 11 exits the cigarette and is delivered to the user. In use, the user can inhale the proximal end of the cigarette to inhale the aerosol generated by the aerosol forming matrix 11. Furthermore, in this description, the proximal end refers to the end closer to the user, and the distal end refers to the end furthest from the user, opposite to the proximal end.

[0066] In the context of this disclosure, the longitudinal direction may specifically refer to the length direction of the heating device (e.g., Figure 5 The longitudinal axis AA shown extends in the direction of extension. The circumferential direction can be specifically indicated as the direction perpendicular to the longitudinal direction, and the radial direction can be perpendicular to the longitudinal direction of the heating element and specifically indicates the diameter direction of the heating device. Furthermore, in the context of this disclosure, the expression "a plurality of" can be understood to mean two or more.

[0067] like Figure 2 As shown, the second wall 202 includes one or more first vent holes 71 disposed at the tapered portion 253. The first vent holes 71 are disposed through the wall portion of the tapered portion 253 and are configured to be disposed along the circumferential direction of the tapered portion 253 so as to allow airflow from the venting channel of the first clamping member 251 through the first vent holes 71 into the second air passage 52.

[0068] In addition, the first wall 201 includes a proximal end of the first wall adjacent to the third wall 203 and a distal end of the first wall opposite to the proximal end of the first wall, and the distal end of the first wall is provided with an opening 27.

[0069] In some exemplary embodiments, the first wall 201 includes one or more second vent holes 72, which are configured to penetrate the wall portion of the first wall 201 adjacent to the proximal end of the first wall, and are configured to be arranged along the circumferential direction.

[0070] The first vent 71 or the second vent 72 can be configured to have any of the following shapes: circular, rectangular, rhomboid, triangular, elliptical, trapezoidal, or irregular. The shape, size, and arrangement of the first vent 71 or the second vent 72 are not limited to the configurations described in this disclosure, but can be changed according to the suction resistance adjustment needs of the aerosol generating device.

[0071] When the heating element 21 of the heating device 20 is energized and heats up, ambient air enters the second air passage 52 of the heating device 20 from the proximal end of the first clamping member 251 through the venting channels between the plurality of protrusions 70 and through the first vent 71 of the second wall 202. The air in the second air passage 52 is heated by the heating element 21 to form a hot airflow. In addition, the air in the first air passage 51 is heated by the heating element 21 to form a hot airflow, which fully preheats the aerosol forming matrix 11 of the cigarette in the circumferential direction. Furthermore, a portion of the hot airflow in the second air passage 52 can enter the first air passage 51 through the second vent 72.

[0072] The hot airflow in the second air passage 52 can merge with the hot airflow in the first air passage 51 through the opening 27 at the distal end of the first wall, so that the two merging hot airflows enter the aerosol forming matrix 11 of the cigarette from the distal end of the cigarette to heat it.

[0073] Therefore, the heating device 20 in the exemplary embodiment of this disclosure forms a unique airflow heat transfer path including a first air channel 51 and a second air channel 52, achieving uniform and efficient heating of the aerosol forming matrix 11. Specifically, the heated hot air in the first air channel 51 can surround the aerosol forming matrix 11 to fully preheat it. The heated hot air in the second air channel 52 and the heated hot air in the first air channel 51 can merge at the distal end of the first wall and enter the smoke column from the bottom of the aerosol forming matrix 11. The two hot air streams work together to efficiently heat the aerosol forming matrix 11, that is, heating the aerosol forming matrix from the periphery and bottom of the aerosol forming matrix is ​​achieved by heated hot air. Through this airflow heat transfer path, the heating device 20 can achieve zero cleanliness and efficient use of thermal energy, saving electricity.

[0074] In addition, the heat generated when the heating element 21 is powered on is almost completely absorbed by the aerosol forming matrix 11 of the cigarette, which improves the heat utilization rate, thereby saving energy and reducing the preheating time.

[0075] In addition, during the user's inhalation of the cigarette, ambient air is continuously supplied through the second air channel 52 of the heating device 20, which further reduces the heat conducted to the outer shell of the aerosol generating device, and to a certain extent achieves heat insulation and cooling of the outer shell of the aerosol generating device.

[0076] In some examples, the first clamping member 251 may be made of a plastic material. Alternatively, the plurality of protrusions 70 may be made of a resilient plastic material.

[0077] Furthermore, it should be understood that the heating device of this application may also include additional heating elements configured to heat the aerosol forming matrix 11 of the cigarette in other ways, such as by inserting the additional heating element into the aerosol forming matrix to heat the aerosol forming matrix.

[0078] The following is combined with Figure 5 and Figure 7 The heating element 21 of the heating device 20 will be described.

[0079] The heating element 21 of the heating device 20 can be formed of any suitable resistive material. For example, suitable resistive materials can be metals or metal alloys, including, but not limited to, titanium, zirconium, tantalum, platinum, nickel, cobalt, chromium, hafnium, niobium, molybdenum, tungsten, tin, gallium, manganese, iron, copper, stainless steel, or nickel-chromium alloys. Alternatively, the heating element 21 can be implemented using metal wire, a metal plate with conductive traces, or a ceramic heating element, but is not limited to these.

[0080] like Figure 5 As shown, the heating element 21 can be configured to have a cylindrical shape. In one example, the heating element 21 can be a cylindrical portion made of a thermally conductive metal material.

[0081] In some other exemplary embodiments, the heating element 21 includes a first layer of material disposed radially inward and a second layer of material disposed around the first layer of material. Optionally, in some examples, the first layer of material may be a metal carrier made of metal and serving as a heat conductor, while the second layer of material may be made of a metal heating wire mesh or an alloy heating wire and serving as an active heating element.

[0082] In other examples, the first layer of material may be an active heating element made of metal, and the second layer of material may be made of insulating material.

[0083] exist Figure 7 In the illustrated embodiment, the heating element 21 may be configured to include a cylindrical ceramic body 80 and a metal wire 81 disposed around the ceramic body 80. Optionally, the metal wire 81 extends in a spiral manner around the ceramic body 80 along the outer peripheral surface of the ceramic body. Additionally, as... Figure 7 As shown, the heating element 21 may include a groove 60 located on its outer surface, the groove 60 extending spirally around the outer surface of the heating element 21, and a metal wire being accommodated in the groove 60. Optionally, the number of grooves 60 and metal wires can be set to multiple as needed. In some examples, the groove is formed on the outer surface of the heating element 21 by laser cutting, etching, machining, or other methods.

[0084] Optionally, the metal wire 81 can be a conductive trace formed on the ceramic body 80 by thick film printing, sintering, etching, or other methods. Optionally, the metal wire 81 can be made of tungsten, gold, platinum, silver, copper, nickel, palladium, or a combination thereof.

[0085] like Figure 8 As shown, the heating component 21 can be configured to include a first heating portion 211, which includes one or more first concave portions or first convex portions extending along the longitudinal direction of the first heating portion 211 on its outer surface. By providing one or more first concave portions or first convex portions, the heat conduction area of ​​the first heating portion 211 is increased, thereby improving the heat conduction efficiency.

[0086] like Figure 9As shown, the heating component 21 can be configured to include a second heating portion 212, which includes one or more second concave portions or one or more second convex portions extending along the circumferential direction on its outer surface. By providing one or more second concave portions or second convex portions, the heat conduction area of ​​the second heating portion 212 is increased, thereby improving the heat conduction efficiency.

[0087] like Figure 10 and Figure 11 As shown, the heating element 21 can be configured to include a third heating portion 213, which includes one or more third concave portions or third convex portions extending in a meandering manner along the circumferential direction of its outer surface. For example, the plurality of third concave portions are arranged in a corrugated shape along the circumferential direction of the third heating portion 213. Optionally, the plurality of third concave portions can be separated from each other at the same interval or at different intervals. By providing one or more third concave portions or third convex portions, the heat conduction area of ​​the third heating portion 213 is increased, thereby improving the heat conduction efficiency.

[0088] like Figure 12 As shown, the heating member 21 can be configured to include a fourth heating portion 214, which includes one or more longitudinal concave portions or longitudinal convex portions extending in a longitudinal direction on its outer surface; and one or more circumferential concave portions or circumferential convex portions extending in a circumferential direction on the outer surface of the fourth heating portion. Optionally, the plurality of longitudinal concave portions or the plurality of longitudinal convex portions can be separated from each other at the same interval or at different intervals, and the plurality of circumferential concave portions or the plurality of circumferential convex portions can be separated from each other at the same interval or at different intervals.

[0089] like Figure 13 and Figure 14 As shown, the heating member 21 may be configured to include a fifth heating portion 215, which includes one or more longitudinal concave portions or longitudinal convex portions extending in a meandering manner along a generally longitudinal direction on its outer surface; and one or more circumferential concave portions or circumferential convex portions extending in a meandering manner along a generally circumferential direction on the outer surface of the fifth heating portion 215.

[0090] In one example, the heating element may include one or more concave or convex portions extending in a spiral manner on its outer surface.

[0091] It should be understood that the heating element 21 may be configured to include any one or a combination of the first heating element 211, the second heating element 212, the third heating element 213, the fourth heating element 214, and the fifth heating element 215. The specific shape and size of the pattern disposed on the surface of the heating element 21 are not limited to the configurations shown in the above description and figures. The heat transfer element of the heating element 21 may include various other shapes, and the shape and size of the pattern of the heating element 21 used to increase the heat conduction surface can be changed according to actual needs.

[0092] According to some exemplary embodiments of this application, an aerosol generating apparatus 100 is provided. For example... Figure 15 As shown, the aerosol generating device 100 may include one or more heating devices, at least one of which may be the heating device 20 as described above. Some of the multiple heating devices may be inserted into the cigarette, while others may be arranged on the outside of the cigarette.

[0093] The aerosol generating apparatus 100 may include a power supply device configured to supply power to a heating device. In other words, the power supply device may be electrically connected to the heating device so that the heating device can be heated. The power supplied from the power supply device to the heating device may be controlled by a controller. The power supply device may, according to commands from the controller, begin supplying power to the heating device, increase or decrease the power supply, or cut off the power supply. The power supply device may include, for example, a battery (disposable or rechargeable), a lithium-ion battery, a solid-state battery, a supercapacitor, or a combination thereof.

[0094] The aerosol generating apparatus 100 may include a controller configured to control the power supplied from the power supply device to the heating device, so that the aerosol generating article inserted into the aerosol generating apparatus 100 is appropriately heated, thereby generating an aerosol that can be inhaled by a user.

[0095] The present disclosure has been described above with reference to the accompanying drawings and through the description of embodiments; however, the present disclosure is not limited to the above embodiments. Those skilled in the art will understand that modifications and variations can be made without departing from the technical spirit of the present disclosure, and such modifications and variations are also included within the protection scope of the present disclosure.

[0096] This disclosure provides an aerosol generation apparatus and a heating device thereof. The heating device is configured to heat an aerosol generation article inserted into the aerosol generation apparatus to generate an aerosol. The aerosol generation article includes an aerosol forming matrix. The heating device includes a first wall body comprising a heating element configured to have a hollow cylindrical shape to form a hollow receiving portion. The hollow receiving portion is configured to receive the aerosol forming matrix of the aerosol generation article. The inner diameter of the hollow receiving portion of the heating element is set to be larger than the outer diameter of the aerosol forming matrix of the aerosol generation article to be inserted, so that the heating element... A first air channel is formed between the aerosol forming matrix and the aerosol generating matrix; a second wall is formed, which is coaxially arranged with the first wall along a longitudinal axis. The second wall includes a first clamping member configured to clamp the aerosol generating article inserted into the aerosol generating device and has a venting channel. The second wall has a first venting hole penetrating the second wall. A third wall is formed between the first and second walls. The third wall includes a second clamping member, which is generally cylindrical, and the inner diameter of the second clamping member is substantially equal to the outer diameter of the aerosol generating article. The heating device achieves zero cleanliness, and the heat generated by the heating device is almost completely absorbed by the aerosol forming matrix, improving heat utilization efficiency.

[0097] Furthermore, it is understood that the aerosol generating apparatus and heating device of this disclosure are reproducible and can be applied in a variety of industrial applications. For example, the aerosol generating apparatus and heating device of this disclosure can be applied in the field of electronic cigarette technology.

Claims

1. A heating device for an aerosol generating apparatus, the heating device (20) being configured to heat an aerosol generating article inserted into the aerosol generating apparatus (100) to generate an aerosol, the aerosol generating article comprising an aerosol forming matrix (11), characterized in that, The heating device (20) includes: A first wall (201) includes a heating element (21) configured to have a hollow cylindrical shape to form a hollow receiving portion configured to receive the aerosol forming matrix (11) of the aerosol generating article. The inner diameter of the hollow receiving portion of the heating element (21) is set to be larger than the outer diameter of the aerosol forming matrix (11) of the aerosol generating article to be inserted, so as to form a first air channel (51) between the heating element (21) and the aerosol forming matrix (11). A second wall (202) is coaxially arranged with the first wall (201) along a longitudinal axis. The second wall (202) includes a first clamping member (251) configured to clamp the aerosol-generated article inserted into the aerosol generating device (100) and has ventilation channels. The second wall (202) has a first ventilation hole (71) penetrating the second wall. A third wall (203) is disposed between the first wall (201) and the second wall (202). The third wall (203) includes a second clamping member (253), which is cylindrical and has an inner diameter equal to the outer diameter of the aerosol-generated product. The heating device (20) further includes a housing (24) extending along a longitudinal axis (AA) and having a longitudinally extending cavity formed inside the housing (24), the longitudinally extending cavity being configured to accommodate a portion of the first wall (201), the second wall (202), and the third wall (203) of the heating device (20), the housing (24) being disposed around the heating element (21) to form a second air passage (52) between the housing (24) and the heating element (21); The second wall (202) includes a tapered portion (252) connected to the third wall (203), and one or more first vent holes (71) are provided in the tapered portion (252) through the wall portion of the tapered portion (252). The first vent holes (71) are configured to be arranged along the circumferential direction of the tapered portion (252) to allow airflow from the venting channel of the first clamping member (251) through the first vent holes (71) into the second air passage (52). The first wall (201) includes a first wall proximal end adjacent to the third wall (203) and a first wall distal end opposite to the first wall proximal end, and the first wall distal end is provided with an opening (27).

2. The heating device according to claim 1, characterized in that, The first clamping member (251) has an insertion port for receiving the aerosol-generated article and a plurality of protrusions (70) are provided on the inner surface adjacent to the insertion port. The plurality of protrusions (70) are spaced apart from each other in the circumferential direction and form the ventilation channel between adjacent protrusions.

3. The heating device according to claim 2, characterized in that, The plurality of protrusions (70) extend from the inner surface of the first clamping member (251) toward the longitudinal axis, and the plurality of protrusions (70) are configured to contact the outer surface of the aerosol-generating article.

4. The heating device according to claim 1, characterized in that, The first wall (201) includes one or more second vents (72) configured to penetrate a portion of the first wall (201) adjacent to the proximal end of the first wall, and the one or more second vents (72) are configured to be arranged in a circumferential direction.

5. The heating device according to any one of claims 1 to 4, characterized in that, The heating element (21) is configured to include a first material portion disposed radially inside and a second material portion disposed around the first material portion.

6. The heating device according to any one of claims 1 to 4, characterized in that, The heating element (21) is configured to include a cylindrical ceramic body (80) and a metal wire (81) arranged around the ceramic body (80).

7. The heating device according to any one of claims 1 to 4, characterized in that, The heating element (21) is configured to include one of the following: The first heating part (211) includes one or more first concave portions or first convex portions extending along the longitudinal direction on the outer surface of the first heating part; The second heating part (212) includes one or more second concave portions or second convex portions extending in a circumferential direction on the outer surface of the second heating part; The third heating part (213) includes one or more third concave parts or third convex parts that extend in a meandering manner along the circumferential direction on the outer surface of the third heating part; A fourth heating element (214) comprising: one or more longitudinally concave or convex portions extending along a longitudinal direction on the outer surface of the fourth heating element; and one or more circumferentially concave or circumferentially convex portions extending along a circumferential direction on the outer surface of the fourth heating element; and The fifth heating part (215) includes one or more longitudinal concave or longitudinal convex portions extending in a meandering manner along the longitudinal direction on the outer surface of the fifth heating part; and one or more circumferential concave or circumferential convex portions extending in a meandering manner along the circumferential direction on the outer surface of the fifth heating part.

8. An aerosol generating device, characterized in that, The aerosol generating equipment includes: One or more heating devices, wherein at least one of the one or more heating devices is a heating device according to any one of claims 1 to 7; A power supply device configured to be electrically connected to the heating device and supply power to the heating device; and A controller configured to control the power supplied from the power supply device to the heating device.

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