CN221284674U

CN221284674U - Heating element and aerosol generating device

Info

Publication number: CN221284674U
Application number: CN202322501405.0U
Authority: CN
Inventors: 吴涛; 林福文; 胡瑞龙; 徐中立; 李永海
Original assignee: Shenzhen FirstUnion Technology Co Ltd
Current assignee: Shenzhen FirstUnion Technology Co Ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-07-09
Anticipated expiration: 2033-09-13

Abstract

The embodiment of the application discloses a heating component and an aerosol generating device, wherein the heating component comprises: a heating tube for receiving at least a portion of the aerosol-generating article and heating an outer surface of the aerosol-generating article; a heat conducting member at least partially located in the heating pipe; the heat conducting piece is used for receiving and transmitting part of heat of the heating pipe so as to heat the bottom of the aerosol-generating product, and the heat conductivity of the heat conducting piece is not less than 150W/(m.K). By the mode, on one hand, the heating assembly can heat the outer surface and the bottom of the aerosol-generating product, so that the aerosol-generating product is heated more uniformly and fully; on the other hand, through the heat conducting piece, the heat of the heating pipe can be efficiently transferred, and the heat loss is reduced, so that the power consumption is reduced.

Description

Heating element and aerosol generating device

[ Field of technology ]

The embodiment of the application relates to the technical field of aerosol, in particular to a heating component and an aerosol generating device.

[ Background Art ]

Conventional tobacco-generating substrates (e.g., cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke, and products exist in the prior art that release compounds upon heating without burning to replace these conventional tobacco-generating substrates.

An example of such a product is an aerosol-generating device, in which a heating element is provided, a chamber is formed in the heating element, and an aerosol product used in cooperation with the aerosol-generating device can be inserted into the chamber, and the existing heating element generally adopts a circumferential heating mode to heat the aerosol product inserted into the chamber, so that the aerosol product can volatilize to generate aerosol after being heated, but only by the circumferential heating mode, the aerosol product is insufficiently heated, and the smoke is also insufficiently uniform.

[ utility model ]

Embodiments of the present application provide a heating assembly to provide a more thorough and uniform heating of an aerosol-generating device.

A heating assembly for use in an aerosol-generating device to heat an aerosol-generating article to generate an aerosol, comprising:

A heating tube for receiving at least a portion of the aerosol-generating article and heating an outer surface of the aerosol-generating article;

a heat conducting member at least partially located in the heating pipe;

The heat conducting piece is used for receiving and transmitting part of heat of the heating pipe so as to heat the bottom of the aerosol-generating product, and the heat conductivity of the heat conducting piece is not less than 150W/(m.K).

In one embodiment, the outer wall of the heating tube incorporates a heating element, the heating tube transferring heat generated by the heating element to the aerosol-generating article and the thermally conductive member;

The heating element comprises an infrared electrothermal film layer, a resistance film layer or a resistance heating body which are arranged on the heating pipe.

In one embodiment, the heating element comprises a first heating element for heating the outer surface of the aerosol-generating article and a second heating element for heating the heat-conducting member, distributed along the length of the heating tube.

In one embodiment, the first heating element and the second heating element are configured to heat independently.

In one embodiment, the first heating element has a maximum temperature of greater than 250 ℃ and the second heating element has a maximum temperature of less than 250 ℃.

In one embodiment, the first heating element comprises a first infrared electrothermal film layer coated on the first section of the heating tube, and a first electrode coating and a second electrode coating disposed on the first infrared electrothermal film layer;

The second heating element comprises a second infrared electrothermal film layer coated on the second section of the heating pipe, and a third electrode coating and a fourth electrode coating which are arranged on the second infrared electrothermal film layer;

The first electrode coating, the second electrode coating, the third electrode coating and the fourth electrode coating extend along the longitudinal direction of the heating pipe, and the first infrared electrothermal film layer and the second infrared electrothermal film layer are arranged at intervals.

In one embodiment, the first infrared electrothermal film layer is coated with an area substantially the same as the second infrared electrothermal film layer.

In one embodiment, the heat conducting member has oppositely disposed first and second surfaces, the first surface facing toward and being adjacent to an inlet for providing the aerosol-generating article into the heating tube;

Wherein the first surface is for supporting the aerosol-generating article bottom.

In one embodiment, the inner wall of the heating tube has a convex surface for supporting the aerosol-generating article bottom with the heat conducting member at a predetermined distance from the aerosol-generating article bottom.

wherein the heat conducting member has at least one air passage communicating the first surface and the second surface, and the heat conducting member is for heating an air flow in the air passage.

Wherein the thermally conductive member is formed with a recess in the first surface, a space for storing air being defined between the bottom of the aerosol-generating article and the recess.

In one embodiment, the first surface supports a bottom of the aerosol-generating article.

In one of the embodiments, the groove has a depth of not more than 1.5mm, preferably the groove has a depth of not more than 1 mm.

In one embodiment, the walls of the grooves are provided with through holes for guiding outside air into the grooves.

At least a partial area of the heat conducting member extending from the first surface toward the second surface is surrounded by the heating element.

In one embodiment, the length of the partial region in the axial direction of the heating assembly is greater than 5mm.

In one embodiment, the heat conducting member is provided with an extension wall extending from the second surface in the longitudinal direction;

The outer surface of the extension wall is provided with a slot, the tube wall of the heating tube is provided with a through hole, and the heating component further comprises a connecting piece which penetrates through the through hole and is inserted into the slot so as to connect the heat conducting piece and the heating tube.

In one embodiment, the inner surface of the extension wall is formed with a boss into which the slot extends.

In one embodiment, the heating element does not overlap the extension arm in the longitudinal direction.

In one embodiment, the thermally conductive member comprises at least one of graphite, an aluminum alloy, or copper.

The embodiment of the application also provides a heating assembly applied to an aerosol-generating device for heating an aerosol-generating article to generate an aerosol, comprising:

A circumferential heating element having a receiving cavity therein for receiving at least a portion of the aerosol-generating article and heating an outer surface of the aerosol-generating article;

A bottom heating element at least partially located in the receiving cavity for heating the bottom of the aerosol-generating article;

Wherein the highest temperature of the circumferential heating element is between 200 ℃ and 300 ℃, and the highest temperature of the bottom heating element is between 150 ℃ and 200 ℃.

In one embodiment, the bottom heating element receives and transfers a portion of the heat of the circumferential heating element, thereby heating the bottom of the aerosol-generating article;

Wherein the thermal conductivity of the bottom heating member is not less than 150W/(mK); or the bottom heating member comprises at least one of graphite, aluminum alloy, or copper.

In one embodiment, the bottom heating element has oppositely disposed first and second surfaces, and an air passage communicating the first and second surfaces; the bottom heating element is capable of conducting heat to heat air in the air passage such that the heated air enters the interior of the aerosol-generating article and is heated.

In one embodiment, the bottom heating element has a recess, the bottom heating element being capable of conducting heat to heat air in the recess so that the heated air enters the interior of the aerosol-generating article and is heated.

In one embodiment, the circumferential heating element comprises a heating element and a heating tube, the bottom heating element is disposed inside the heating tube, and the heating element is disposed around the heating tube and the bottom heating element; or alternatively

The circumferential heating member comprises a first heating element, a second heating element and a heating tube, the bottom heating member is arranged inside the heating tube, the first heating element is arranged around the outer surface of the aerosol-generating article, and the second heating element is arranged around the heat conducting member.

In one embodiment, the circumferential heating element comprises a heating element and a heating tube, the bottom heating element is arranged inside the heating tube, the heating element surrounds the heating tube and is arranged away from the bottom heating element, and the bottom heating element is provided with a central heating element.

In one embodiment, the circumferential heating element heats up before the bottom heating element; or alternatively

The circumferential heating elements reach respective maximum temperatures prior to the bottom heating element.

The embodiment of the application also provides an aerosol generating device, which comprises the heating assembly and a power supply unit for supplying electric energy to the heating assembly.

The heating component provided by the above embodiment comprises a heating pipe and a heat conducting piece, wherein the heat conducting piece is arranged in the heating pipe, the heating pipe is used for heating the outer surface of the aerosol-generating product, and the heat conducting piece is used for heating the bottom of the aerosol-generating product, so that the aerosol-generating product can be heated more uniformly and fully in the circumferential direction and the bottom, and the heat conducting piece has a heat conductivity not smaller than 150W/(m.K), so that the heat conducting piece can efficiently absorb and conduct the heat of the heating pipe, further the heat loss can be reduced, and the power consumption is reduced.

[ Description of the drawings ]

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to scale, unless expressly stated otherwise.

Fig. 1 is a schematic structural view of an aerosol-generating device according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of the heating assembly of FIG. 1 in one direction;

FIG. 3 is a schematic perspective view of the heating assembly of FIG. 1 in one orientation;

FIG. 4 is a schematic perspective view of a heating assembly in one direction according to another embodiment;

FIG. 5 is a schematic cross-sectional view of a heating assembly in one direction according to another embodiment;

FIG. 6 is a schematic cross-sectional view of a heating assembly in one direction provided by another embodiment;

FIG. 7 is a schematic perspective view of a heating assembly according to one embodiment supported in one orientation;

FIG. 8 is an exploded view of the heating assembly of FIG. 1 in one orientation;

Fig. 9 is a schematic perspective view of a heat conducting member in one direction according to another embodiment of the present application.

[ Detailed description ] of the invention

In order that the application may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to/affixed to "another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "upper", "lower", "left", "right", "inner", "outer" and the like are used in this specification for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features mentioned in the different embodiments of the application described below can be combined with one another as long as they do not conflict with one another.

In the embodiment of the present application, the "mounting" includes welding, screwing, clamping, adhering, etc. to fix or limit a certain element or device to a specific position or place, where the element or device may be fixed at the specific position or place or may be movable within a limited range, and the element or device may be removable or not removable after being fixed at the specific position or place, which is not limited in the embodiment of the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

An embodiment of the present application provides an aerosol-generating device 100, as shown in fig. 1, the aerosol-generating device 100 includes a power unit 10, a main board 20 and a heating component 30, a controller of the aerosol-generating device 100 is disposed on the main board 20, and the power unit 10 and the heating component 30 are respectively electrically connected to the controller, so that the controller can control the power unit 10 to provide electric power to the heating component 30. The aerosol-generating device 100 is further provided with a longitudinally extending chamber 40, the chamber 40 is configured to receive an aerosol-generating article 200 that is used with the aerosol-generating device 100, and when the aerosol-generating article 200 is received in the chamber 40, at least a portion of the aerosol-generating article 200 is positioned in the heating assembly 30, so that the heating assembly 30 can heat the aerosol-generating article 200, and a portion of the active material that is filled in the aerosol-generating article 200 is volatilized by heating to generate an aerosol, which can be sucked by a user by sucking the aerosol-generating article 200. Wherein the power supply unit 10 is a rechargeable battery cell or a non-rechargeable battery cell.

The aerosol-generating article 200 preferably employs a tobacco-containing material that releases volatile compounds from the article upon heating; or may be a non-tobacco material capable of being heated and thereafter adapted for electrical heating for smoking. The aerosol-generating article 200 preferably employs a solid matrix, which may comprise one or more of powders, granules, shredded strips, ribbons or flakes of one or more of vanilla leaves, tobacco leaves, homogenized tobacco, expanded tobacco; or the solid substrate may contain additional volatile flavour compounds, whether tobacco or not, to be released when the substrate is heated.

As shown in fig. 2 and 3, the heating assembly 30 comprises a heating tube 31 and a heating element 32 attached to an outer wall of the heating tube 31, the heating tube 31 having a first open end 312 and a second open end 313 disposed opposite each other, and a receiving cavity 314 extending between the first open end 312 and the second open end 313, at least a portion of the aerosol-generating article 200 being receivable in the receiving cavity 314 through the first open end 312 when the aerosol-generating article 200 is received in the chamber 40, that is, the first open end 312 being accessible as an inlet for the aerosol-generating article 200 into the receiving cavity 314. The heating element 32 is energized to generate heat, and the heat generated by the heating element 32 is transferred to the aerosol-generating article 200 via the heating tube 31 to heat the outer surface of the aerosol-generating article 200. In some embodiments, the heating element 32 is attached to the inner wall or interior of the heating tube 31.

It should be noted that the aerosol-generating article 200 is generally in the shape of a cigarette, and has a top portion and a bottom portion disposed opposite to each other along its length, the top portion being for the user to inhale, and the solid matrix filled in the aerosol-generating article 200 is exposed at the bottom portion, and the outer surface of the aerosol-generating article 200 is a surface extending between the top portion and the bottom portion, and when the user inhales, external air may enter the aerosol-generating article 200 from the bottom portion.

The heating assembly 30 further comprises a heat conducting member 33 at least partially disposed in the receiving cavity 314, in particular, the heat conducting member 33 is fittable into the heating tube 31 from the second open end 313 of the heating tube 31, the heat conducting member 33 has a first surface 331 and a second surface 332 disposed opposite each other, the first surface 331 is configured to support the aerosol-generating article 200 received in the receiving cavity 314, and when the heating element 32 is energized, heat from the heating element 32 is transferred to the heating tube 31, such that the heat conducting member 33 receives and transfers a portion of the heat from the heating tube 31, thereby causing the heat conducting member 33 to heat the bottom of the aerosol-generating article 200.

Alternatively, in some embodiments, the first surface 331 may not support the aerosol-generating article 200, for example, a raised surface (not shown) may extend from an inner wall of the heating tube 31, and when the aerosol-generating article 200 is received in the receiving cavity 314, the bottom of the aerosol-generating article 200 abuts against the raised surface, such that the raised surface provides support to the aerosol-generating article 200, and the heat-conducting member 33 is maintained at a suitable predetermined distance from the bottom of the aerosol-generating article 200, in such a way that the heat-conducting member 33 may also transfer heat to the aerosol-generating article 200.

It will be readily appreciated that the heating tube 31 and the heat conducting member 33 are both made of a material having a relatively high thermal conductivity, so as to efficiently conduct the heat generated by the heating element 32 to the aerosol-generating article 200. The material of the heating pipe 31 and the heat conductive member 33 may be a metal or a ceramic material, and the ceramic material may be any one of oxide, nitride, carbide, boride, and the like. Since the heat conducting member 33 needs to transfer the heat of the heating pipe 31 again, the heat conducting member 33 needs to be made of a material having a higher thermal conductivity, and preferably, when the thermal conductivity of the heat conducting member 33 is not lower than 150W/(m·k), the heat conducting member 33 can effectively transfer the heat to the aerosol-generating article 200, and the bottom of the aerosol-generating article 200 is preferably heated.

In some embodiments, the material of the heat conductive member 33 is graphite having a thermal conductivity of not less than 150W/(m·k); or in some embodiments, the material of the heat conductive member 33 is an aluminum alloy having a thermal conductivity of not less than 200W/(m·k); alternatively, the material of the heat conductive member 33 may be copper having a thermal conductivity of not less than 380W/(m·k).

With the heating assembly 30 provided in this embodiment, the heating pipe 31 and the heat conducting member 33 can heat the outer surface and the bottom of the aerosol-generating article 200 respectively, so that the aerosol-generating article 200 can be heated more sufficiently and uniformly, and the suction taste of the user can be effectively improved. Meanwhile, the heat conducting piece 33 effectively transfers the heat of the heating element 32, so that the heat loss can be reduced, and the power consumption of the heating assembly 30 can be further reduced.

It should be noted that, since the heating tube 31 heats the outer surface of the aerosol-generating article 200, the heating tube 31 may also be referred to as a circumferential heating member, and the heat conducting member 33 heats the bottom of the aerosol-generating article 200, and thus the heat conducting member 33 may also be referred to as a bottom heating member. By adjusting the maximum heating temperature of the heating pipe 31 and the heat conducting member 33, the aerosol-generating article 200 can be heated sufficiently and uniformly, and thus the aerosol with better taste can be released, preferably, the maximum heating temperature of the heating pipe 31 is between 200 ℃ and 300 ℃, and the maximum heating temperature of the heat conducting member 33 is between 150 ℃ and 200 ℃.

The heating element 32 preferably adopts an infrared electrothermal film layer coated on the outer wall or the inner wall of the heating tube 31, and the infrared electrothermal film layer can generate heat after being electrified, and the heat is transferred to the heating tube 31, so that the heating tube 31 heats the outer surface of the aerosol-generating article 200; on the other hand, the infrared electrothermal film layer is configured to receive electric power to generate heat and further generate infrared light with a certain wavelength, and when the wavelength of the infrared light matches the absorption wavelength of the aerosol-generating article 200, the energy of the infrared light is easily absorbed by the aerosol-generating article 200, so that heat is generated on the aerosol-generating article 200, and the aerosol-generating article 200 can be further heated.

In other embodiments, the heating element 32 may be a mesh-shaped resistance heating element wrapped on the outer wall of the heating tube 31, and the mesh-shaped resistance heating element may generate heat when energized, and then transfer the heat to the heating tube 31. Or in some embodiments the heating element 32 is a resistive film layer printed on the outer wall of the heating tube 31 in the form of thick film heat. Or in some embodiments, the heating element 32 employs a flexible polyimide heater.

The heating tube 31 in the above embodiment heats the aerosol-generating article 200 by transferring heat from the heating element 32. In some embodiments, the heating tube 31 may also itself generate heat to heat the aerosol-generating article 200. Specifically, the heating tube 31 may be made of an electrothermal material, the heating tube 31 is electrically connected to the main board 20 through an electrode lead, the main board 20 controls the power supply unit 10 to supply electric energy to the heating tube 31, and the heating tube 31 obtains the electric energy to generate heat.

Or in some embodiments, an induction coil (not shown) is wound on the outer wall of the heating tube 31 or a bracket outside the outer wall, the controller controls the power supply unit 10 to supply alternating current to the induction coil, the induction coil generates a changing magnetic field under the action of the alternating current, the changing magnetic field penetrates the heating tube 31 to further enable the heating tube 31 to induce eddy currents, and the heating tube 31 generates heat under the action of eddy current effect and hysteresis effect, so that the aerosol-generating article 200 can be heated.

In order to induce eddy currents on the heating tube 31, the material of the heating tube 31 may be any one of graphite, molybdenum, silicon carbide, stainless steel, niobium, aluminum, nickel, iron, copper, a nickel-containing compound, titanium, and a metal material composite. In some embodiments, to better induce eddy currents to increase heating efficiency, the material of the heating tube 31 is preferably a ferromagnetic material or is composed of a ferromagnetic material, such as ferrite iron, ferromagnetic alloys (e.g., ferromagnetic steel or stainless steel), ferromagnetic particles, and ferrite.

In some embodiments, as shown in fig. 3, the heating element 32 includes a first heating element 321 and a second heating element 322 spaced apart along the length of the heating tube 31, the first heating element 321 being correspondingly provided with a first electrode coating 3211 and a second electrode coating (not shown) spaced apart from each other and extending longitudinally, and the first heating element 321 being located between the first electrode coating 3211 and the second electrode coating; similarly, the second heating element 322 is correspondingly provided with a third electrode coating 3221 and a fourth electrode coating (not shown) which are spaced apart from each other and longitudinally extend, when the heating element 32 is an infrared electrothermal film layer, the corresponding electrode coatings can be printed on the surface of the infrared electrothermal film layer by printing, and the printed electrodes can be connected to the main board 20 by welding wires or metal sheets, etc., so that the main board 20 controls the supply of electric power to the first heating element 321 and the second heating element 322, respectively.

The first heating element 321 is located above the second heating element 322 such that the first heating element 321 is used to heat the outer surface of the aerosol-generating article 200 and the second heating element 322 is used to heat the bottom of the aerosol-generating article 200. The heat generated by the first heating element 321 is transferred to the heating tube 31, so that the heating tube 31 heats the outer surface of the aerosol-generating article 200, and the heat generated by the second heating element 322 is transferred to the heating tube 31, then transferred to the heat conducting member 33 by the heating tube 31, and then heated by the heat conducting member 33 to the bottom of the aerosol-generating article 200.

And, in some embodiments, the maximum heating temperatures that the first heating element 321 and the second heating element 322 can reach during heating are different, the first heating element 321 having a maximum heating temperature greater than 250 ℃, preferably the first heating element 321 having a maximum heating temperature of 260 ℃ to 270 ℃; while the second heating element 322 has a maximum heating temperature of less than 250 c, preferably the second heating element 322 has a maximum temperature of 220 c to 230 c so that the aerosol-generating article 200 can be sufficiently heated to release an aerosol with a better mouthfeel. The maximum heating temperature of the first heating element 321 being greater than the maximum heating temperature of the second heating element 322 may better preheat the aerosol-generating article 200 so that the aerosol-generating article 200 has a better smoke volume in the first few mouths of the puff.

And, in some embodiments, the second electrode coating and the fourth electrode coating may be independently disposed so as not to be electrically conductive to each other, where the first heating element 321 and the second heating element 322 each have two independent electrodes; or in some embodiments, the second electrode coating and the fourth electrode coating are electrically conductive to each other, where the second electrode coating and the fourth electrode coating can act as negative electrodes for the electrodes and are shared by the first heating element 321 and the second heating element 322.

And, in some embodiments, when the heating element 32 is an infrared electrothermal film layer coated on the heating tube 31, the size of the area over which the first heating element 321 and the second heating element 322 are coated also has an effect on the adequate heating of the aerosol-generating article 200. Preferably, the area of the first heating element 321 coated is substantially the same size as the area of the second heating element 322 coated, which is advantageous for fully heating the aerosol-generating article 200.

Further in some embodiments, the first heating element 321 and the second heating element 322 may heat simultaneously or may heat independently. Preferably, the controller controls the first heating element 321 and the second heating element 322 to heat independently, so that during the front period of the heating cycle, the controller may control the first heating element 321 to output a larger power, so that the first heating element 321 heats up quickly, and thus heats the side of the aerosol-generating article 200 quickly, and control the second heating element 322 to output a smaller power, so that the second heating element 322 heats up slowly, and thus heats the bottom of the aerosol-generating article 200 slowly.

And at a later time of the heating cycle, the controller may control the first heating element 321 to output less power to maintain the temperature of the aerosol-generating article 200, and control the second heating element 322 to output more power to cause the second heating element 322 to begin to rapidly warm up and thus begin to rapidly heat the bottom of the aerosol-generating article 200. Thus, by providing the first heating element 321 and the second heating element 322 as separate controls, the heating element 32 can be flexibly controlled to heat the aerosol-generating article 200 to an optimal temperature, thereby producing an aerosol with a better mouthfeel for the user to inhale.

And, in some embodiments, to enable the aerosol-generating article 200 to produce an aerosol with a better mouthfeel, the controller may control the first heating element 321 to begin heating in preference to the second heating element 322, or the controller may control the first heating element 321 to reach a maximum heating temperature in preference to the second heating element 322.

It is noted that in some embodiments, as shown in fig. 4, only one heating element 32 may be provided, where the heating element 32 extends substantially between the first surface 331 and the second surface 332 so as to be able to surround at least a portion of the heat conducting member 33, and where the heating element 32 need only be provided with a pair of electrodes 34.

In some embodiments, as shown in fig. 2, the aerosol-generating device 100 includes an air inlet 50 for the external air to enter, and an air flow channel 60 communicating with the air inlet 50, the heat conducting member 33 further includes a plurality of air channels 333 communicating with the first surface 331 and the second surface 332, the air channels 333 being in communication with the air flow channel 60, and when a user draws on the aerosol-generating article 200, the external air can enter the aerosol-generating article 200 from the bottom of the aerosol-generating article 200 through the air channels 60 and the air channels 333, thereby carrying the aerosol generated by the thermal volatilization in the aerosol-generating article 200 for inhalation by the user. When the outside air flows through the air passage 333, the heat conducting member 33 heats the outside air, and when the heated outside air forms a hot air flow into the aerosol-generating article 200, the aerosol-generating article 200 can be heated, and the heating efficiency can be improved.

Alternatively, the air passage 333 may not be connected to the outside air, and when the heating unit 30 is installed in the aerosol-generating device, the air flow flowing through the air passage 333 is air remaining inside the aerosol-generating device, and the outside air enters through the air inlet hole of the aerosol-generating article 200 itself, and when the user sucks on the aerosol-generating article 200, the remaining air flows through the air passage to be heated by the heat conductive member 33, thereby forming a hot air flow to heat the aerosol-generating article 200. Further in some embodiments, when the heating element 31 is coupled to the heating tube 31, at least a portion of the area of the first surface 331 of the heat conducting member 33 extending toward the second surface 332 is surrounded by the heating element 32, thereby allowing the heat conducting member 33 to better receive and transfer heat from the heating tube 31. And, in some embodiments, the length of the surrounded area along the axial direction of the heating tube 31 is at least 5cm, and if the length of the heat conducting member 33 surrounded by the heating element 32 is insufficient, the heat on the heat conducting member 33 is insufficient to heat the bottom of the aerosol-generating article 200 well, which in turn affects the concentration of the aerosol, resulting in poor smoking feel for the user.

Or in some embodiments, when the heating element 32 is comprised of a first heating element 321 and a second heating element 322, where the first heating element 321 is wrapped around the outer surface of the aerosol-generating article 200 and the second heating element 322 is wrapped around the thermally conductive member 33, at least a portion of the area of the first surface 331 of the thermally conductive member 33 extending toward the second surface 332 is wrapped around by the second heating element 322.

In some embodiments, as shown in fig. 5, to avoid that the solid substrate remaining after heating in the aerosol-generating article 200 falls in the air channel 333, which is detrimental to cleaning the heating component 30, the heat conducting member 33 removes the air channel 333 and a recess 3311 is provided in the first surface 331, the first surface 331 providing support for the bottom of the aerosol-generating article 200, the bottom of the aerosol-generating article 200 and the recess 3311 define a space for storing air when the aerosol-generating article 200 is supported on the first surface 331, and when the space is in communication with the outside air, the outside air may enter the recess 3311, that is, enter the space 3311 and thus the aerosol-generating article 200 through the gap between the heating tube 31 and the aerosol-generating article 200. Meanwhile, when the external air flows through the space 3311, the external air may be heated by the heat conductive member 33 to form a hot air flow, which may also play a role in heating when entering the aerosol-generating article 200.

Alternatively, in some embodiments, the space 3311 may not be in communication with the outside air, and when the heating assembly 30 is installed in the aerosol-generating device, the air flow flowing through the space 3311 is air trapped inside the aerosol-generating device, and the outside air enters through the air inlet holes of the aerosol-generating article 200 itself, and when the user draws on the aerosol-generating article 200, the trapped air flows through the space 3311 and is heated by the heat-conducting member 33, thereby forming a hot air flow to heat the aerosol-generating article 200.

And, in some embodiments, as shown in fig. 5, in order to guide the external air into the above-mentioned groove 3311, the groove wall of the groove 3311 is provided with through holes 3312, and the through holes 3312 may be provided in plurality and spaced apart from each other in the circumferential direction so as to guide more external air into the groove 3311.

And, in some embodiments, as shown in fig. 5, the groove 3311 needs to have a suitable depth d, and if the depth d of the groove 3311 is too large, the groove 3311 corresponds to an air medium layer which plays a role of heat insulation so as to affect the effect of the heat conducting member 33 on heating the bottom of the aerosol-generating article 200, and preferably, the depth d of the groove 3311 is not more than 1.5mm so as to avoid the formation of an air medium layer in the groove 3311; or more preferably, the depth d of the grooves 3311 is not more than 1mm.

In some embodiments, as shown in fig. 7 and 8, to fix the heat conducting member 33 in the heating tube 31, an extending wall 3321 longitudinally extends from the second surface 332, a slot 3323 is formed on an outer surface of the extending wall 3321, a through hole 311 is correspondingly formed on a tube wall of the heating tube 31, when the heat conducting member 33 is accommodated in the heating tube 31, the slot 3323 is correspondingly communicated with the through hole 311, and the heating assembly 30 further includes a connecting member 3324 for connecting the heat conducting member 33 and the heating tube 31, specifically, the connecting member 3323 may be inserted into the slot 3323 from the outside of the heating assembly 30 through the through hole 311, and then the heat conducting member 33 and the heating tube 31 are connected, so that the heat conducting member 33 is fixed in the heating tube 31.

As shown in fig. 7, the second surface 332 and the extending wall 3321 define an insulation space 3322, and the heating element 32 extends between the first surface 331 and the second surface 332, that is, the heating element 32 and the extending wall 3321 are not overlapped in the longitudinal direction, and due to the insulation space 3322, heat of the heated region of the heat conducting member 33 is difficult to be transferred outwards, which is advantageous for maintaining heat of the heat conducting member 33.

Further in some embodiments, as shown in fig. 7, the inner surface of the extension wall 3321 is formed with a boss 3325, the slot 3323 extends into the boss 3325, and the connecting piece 3323 can be inserted into the slot 3323 more so as to connect the heat conducting piece 33 and the heating tube 31 more stably.

It should be noted that, the slot 3323 may not be disposed on the extension wall 3321, and in some embodiments, the slot 3323 may be disposed on an outer surface between the first surface 331 and the second surface 332 of the heat conducting member 33, where the slot 3323 needs to avoid the air channel 333, so that the hot air in the air channel 333 leaks through the slot 3323, thereby reducing the heating efficiency of the heat conducting member 33.

It should be noted that, in some embodiments, the heating tube 31 is attached with the heating element 32 such as the infrared electrothermal coating, the heat generated by the heating element 32 is used to heat the outer surface of the aerosol-generating article 200, and a separate heating element is disposed in the heat conducting member 33, as shown in fig. 9, a central heating member 334 is disposed in a central area of the heat conducting member 33, the central heating member 334 has an electrode lead 3341, the electrode lead 3341 is electrically connected to the motherboard 20, and the controller can control the power supply unit 10 to supply electric energy to the central heating member 334, so that the central heating member 334 can generate heat by obtaining electric energy. The central heating member 334 penetrates the first surface 331 and the second surface 332 of the heat conducting member 33, and the end of the central heating member 334 is configured in a pin shape or a sheet shape so that the central heating assembly 334 is inserted into the aerosol-generating article 200 for heating. In this case, the heating element 32 is wound around the heating tube 31 while avoiding the heat-conducting member 33.

Or in some embodiments the central heating element 334 does not protrude from the first surface 331, the central heating element 334 being primarily for heating air in the air channel 333, and the heated air forming a hot air flow from the heated air for heating the bottom of the aerosol-generating article 200.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the application, the steps may be implemented in any order, and there are many other variations of the different aspects of the application as described above, which are not provided in detail for the sake of brevity; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims

1. A heating assembly for use in an aerosol-generating device for heating an aerosol-generating article to generate an aerosol, comprising:

a heat conducting member at least partially located in the heating pipe;

2. A heating assembly according to claim 1, wherein the outer wall of the heating tube incorporates a heating element, the heating tube transferring heat generated by the heating element to the aerosol-generating article and the thermally conductive member;

3. A heating assembly according to claim 2, wherein the heating elements comprise first heating elements for heating the outer surface of the aerosol-generating article and second heating elements for heating the thermally conductive member distributed along the length of the heating tube.

4. The heating assembly of claim 3, wherein the first heating element and the second heating element are configured to heat independently.

5. A heating assembly according to claim 3, wherein the first heating element has a maximum temperature of greater than 250 ℃ and the second heating element has a maximum temperature of less than 250 ℃.

6. A heating assembly according to claim 3, wherein the first heating element comprises a first infrared electrothermal film layer applied to the first section of the heating tube, and a first electrode coating and a second electrode coating disposed on the first infrared electrothermal film layer;

7. The heating assembly of claim 6, wherein the first infrared electrothermal film layer is coated with an area substantially the same as the second infrared electrothermal film layer.

8. A heating assembly according to claim 1, wherein the thermally conductive member has oppositely disposed first and second surfaces, the first surface being oriented towards and adjacent to an inlet for providing the aerosol-generating article into the heating tube;

9. A heating assembly according to claim 1, wherein the inner wall of the heating tube has a convex surface for supporting the aerosol-generating article bottom with the heat conducting member at a predetermined distance from the aerosol-generating article bottom.

10. A heating assembly according to claim 1, wherein the thermally conductive member has oppositely disposed first and second surfaces, the first surface being oriented towards and adjacent to an inlet for providing the aerosol-generating article into the heating tube;

11. A heating assembly according to claim 1, wherein the thermally conductive member has oppositely disposed first and second surfaces, the first surface being oriented towards and adjacent to an inlet for providing the aerosol-generating article into the heating tube;

12. A heating assembly according to claim 11, wherein the first surface supports a bottom of the aerosol-generating article.

13. The heating assembly of claim 11, wherein the groove has a depth of no greater than 1.5 mm.

14. The heating assembly of claim 11, wherein walls of the recess are provided with through holes for guiding outside air into the recess.

15. A heating assembly according to claim 2, wherein the thermally conductive member has oppositely disposed first and second surfaces, the first surface being oriented towards and adjacent to an inlet for providing the aerosol-generating article into the heating tube;

16. The heating assembly of claim 15, wherein the length of the partial region in the axial direction of the heating assembly is greater than 5mm.

17. The heating assembly of claim 15, wherein the thermally conductive member extends from the second surface in a longitudinal direction with an extension wall;

18. The heating assembly of claim 17, wherein an inner surface of the extension wall is formed with a boss into which the slot extends.

19. The heating assembly of claim 17, wherein the heating element does not overlap the extension arm in a longitudinal direction.

20. The heating assembly of claim 1, wherein the thermally conductive member comprises at least one of graphite, an aluminum alloy, or copper.

21. A heating assembly for use in an aerosol-generating device for heating an aerosol-generating article to generate an aerosol, comprising:

22. A heating assembly according to claim 21, wherein the bottom heating member receives and transfers part of the heat of the circumferential heating member to heat the bottom of the aerosol-generating article;

23. The heating assembly of claim 21, wherein the bottom heating member has oppositely disposed first and second surfaces, and an air passage communicating the first and second surfaces; the bottom heating element is capable of conducting heat to heat air in the air passage such that the heated air enters the interior of the aerosol-generating article and is heated.

24. The heating assembly of claim 21, wherein the bottom heating member has a recess, the bottom heating member being capable of conducting heat to heat air in the recess to cause the heated air to enter the interior of the aerosol-generating article and heat.

25. The heating assembly of claim 21, wherein the circumferential heating element comprises a heating element and a heating tube, the bottom heating element being disposed inside the heating tube, the heating element being disposed around the heating tube and the bottom heating element; or alternatively

The circumferential heating member comprises a first heating element, a second heating element and a heating tube, the bottom heating member is arranged inside the heating tube, the first heating element is arranged around the outer surface of the aerosol-generating article, and the second heating element is arranged around the bottom heating member.

26. The heating assembly of claim 21, wherein the circumferential heating element comprises a heating element and a heating tube, the bottom heating element is disposed inside the heating tube, the heating element is disposed around the heating tube and away from the bottom heating element, and the bottom heating element is provided with a central heating element.

27. The heating assembly of claim 21, wherein the circumferential heating element generates heat prior to the bottom heating element; or alternatively

The circumferential heating elements reach respective maximum temperatures before the bottom heating elements.

28. An aerosol-generating device comprising a heating assembly according to any of claims 1 to 27, and a power supply unit for providing electrical energy to the heating assembly.