Heating assembly and aerosol generating device

Abstract

The embodiment of the invention discloses a heating assembly and an aerosol generating device, and the heating assembly comprises a heating pipe which is used for accommodating at least one part of an aerosol generating product and heating the outer surface of the aerosol generating product; at least part of the heat conduction piece is located in the heating pipe; wherein the heat conduction 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 conduction piece is not smaller than 150 W / (m.K). By means of the mode, on one hand, the heating assembly can heat the outer surface and the bottom of the aerosol generating product, and then the aerosol generating product is heated more evenly and fully; and on the other hand, through the heat conduction piece, heat of the heating pipe can be efficiently transmitted, heat loss is reduced, and therefore power consumption is reduced.

Description

[Technical field]

[0001] The embodiments of the present application relate to the field of aerosol technology, and in particular to a heating component and an aerosol generating device. [Background technology]

[0002] Traditional tobacco-generating substrates (eg, cigarettes, cigars, etc.) burn tobacco to generate tobacco smoke during use. Products that release compounds by heating without burning have been available in the prior art to replace these traditional tobacco-generating substrates.

[0003] An example of such a product is an aerosol generating device, which has a heating component disposed therein. A chamber is formed in the heating component, and an aerosol product used in conjunction with the aerosol generating device can be inserted into the chamber. Existing heating components usually use circumferential heating to heat the aerosol product inserted into the chamber. After being heated, the aerosol product can evaporate to generate an aerosol. However, if only relying on this circumferential heating method, the aerosol product is not heated sufficiently and the smoke is not uniform enough. [Summary of the invention]

[0004] The embodiment of the present application provides a heating component to enable an aerosol generating device to heat an aerosol product more fully and evenly.

[0005] A heating assembly is applied to an aerosol generating device to heat an aerosol generating product to generate an aerosol, comprising:

[0006] a heating tube for receiving at least a portion of the aerosol generating product and heating an outer surface of the aerosol generating product;

[0007] a heat conducting member, at least partially located in the heating tube;

[0008] The heat conductor is used to receive and transfer part of the heat of the heating tube, thereby heating the bottom of the aerosol generating product, and the thermal conductivity of the heat conductor is not less than 150 W / (m·K).

[0009] In one embodiment, the outer wall of the heating tube is combined with a heating element, and the heating tube transfers the heat generated by the heating element to the aerosol generating article and the heat conducting member;

[0010] Wherein, the heating element includes an infrared electric heating film layer, a resistance film layer or a resistance heating body arranged on the heating tube.

[0011] In one embodiment, the heating element comprises a first heating element and a second heating element distributed along the length direction of the heating tube, the first heating element is used to heat the outer surface of the aerosol generating article, and the second heating element is used to heat the heat conductive member.

[0012] In one embodiment, the first heating element and the second heating element are configured to be heated independently.

[0013] In one embodiment, the first heating element has a maximum temperature greater than 250°C, and the second heating element has a maximum temperature less than 250°C.

[0014] In one embodiment, the first heating element includes a first infrared electric heating 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 electric heating film layer;

[0015] The second heating element comprises a second infrared electric heating film layer coated on the second section of the heating tube, and a third electrode coating and a fourth electrode coating arranged on the second infrared electric heating film layer;

[0016] The first electrode coating, the second electrode coating, the third electrode coating and the fourth electrode coating all extend along the longitudinal direction of the heating tube, and the first infrared electric heating film layer and the second infrared electric heating film layer are arranged at intervals.

[0017] In one embodiment, the area coated by the first infrared electrothermal film layer is substantially the same as the area coated by the second infrared electrothermal film layer.

[0018] In one embodiment, the heat conductive member has a first surface and a second surface disposed opposite to each other, wherein the first surface faces toward and is close to an inlet for providing the aerosol generating article to enter the heating tube;

[0019] Wherein, the first surface is used to support the bottom of the aerosol generating article.

[0020] In one of the embodiments, the inner wall of the heating tube has a convex surface, and the convex surface is used to support the bottom of the aerosol generating article so that the heat conductive member has a preset distance from the bottom of the aerosol generating article.

[0021] In one embodiment, the heat conductive member has a first surface and a second surface disposed opposite to each other, wherein the first surface faces toward and is close to an inlet for providing the aerosol generating article to enter the heating tube;

[0022] The heat conducting member has at least one air channel connecting the first surface and the second surface, and the heat conducting member is used to heat the air flow in the air channel.

[0023] In one embodiment, the heat conductive member has a first surface and a second surface disposed opposite to each other, wherein the first surface faces toward and is close to an inlet for providing the aerosol generating article to enter the heating tube;

[0024] The heat-conducting member has a groove formed on the first surface, and a space for storing air is defined between the bottom of the aerosol generating product and the groove.

[0025] In one embodiment, the first surface supports the bottom of the aerosol-generating article.

[0026] In one embodiment, the groove has a depth of no more than 1.5 mm, and preferably, the groove has a depth of no more than 1 mm.

[0027] In one of the embodiments, a through hole is provided on the groove wall of the groove for guiding external air into the groove.

[0028] In one embodiment, the heat conductive member has a first surface and a second surface disposed opposite to each other, wherein the first surface faces toward and is close to an inlet for providing the aerosol generating article to enter the heating tube;

[0029] At least a portion of the heat conducting member extending from the first surface toward the second surface is surrounded by the heating element.

[0030] In one of the embodiments, the length of the partial area along the axial direction of the heating component is greater than 5 mm.

[0031] In one embodiment, the heat conducting member has an extension wall extending from the second surface in the longitudinal direction;

[0032] The outer surface of the extension wall is formed with a slot, the tube wall of the heating tube is formed with a through hole, and the heating assembly also includes a connecting piece inserted into the slot through the through hole to connect the heat conductor and the heating tube.

[0033] In one embodiment, a boss is formed on the inner surface of the extension wall, and the slot extends into the boss.

[0034] In one of the embodiments, the heating element and the extension arm do not overlap in the longitudinal direction.

[0035] In one of the embodiments, the heat conducting member includes at least one of graphite, aluminum alloy or copper.

[0036] The present application also provides a heating assembly, which is applied to an aerosol generating device to heat an aerosol generating product to generate an aerosol, including:

[0037] a circumferential heating element, wherein a receiving cavity is provided inside the circumferential heating element, and is used to receive at least a portion of the aerosol generating product and heat the outer surface of the aerosol generating product;

[0038] a bottom heating element, at least partially located in the receiving cavity, for heating the bottom of the aerosol generating article;

[0039] Wherein, the maximum temperature of the circumferential heating element is between 200°C and 300°C, and the maximum temperature of the bottom heating element is between 150°C and 200°C.

[0040] In one embodiment, the bottom heating element receives and transfers part of the heat of the circumferential heating element, thereby heating the bottom of the aerosol generating article;

[0041] Wherein, the thermal conductivity of the bottom heating element is not less than 150 W / (m·K); or the bottom heating element includes at least one of graphite, aluminum alloy or copper.

[0042] In one embodiment, the bottom heating element has a first surface and a second surface arranged opposite to each other, and an air channel connecting the first surface and the second surface; the bottom heating element can conduct heat and thus heat the air in the air channel, so that the heated air enters the interior of the aerosol generating product and is heated.

[0043] In one embodiment, the bottom heating element has a groove, and the bottom heating element can conduct heat to heat the air in the groove, so that the heated air enters into the interior of the aerosol raw product and is heated.

[0044] 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, and the heating element is arranged around the heating tube and the bottom heating element; or

[0045] The circumferential heating element comprises a first heating element, a second heating element and a heating tube, wherein the bottom heating element 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 conductive element.

[0046] In one embodiment, the circumferential heating element includes 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.

[0047] In one embodiment, the circumferential heating element generates heat before the bottom heating element; or

[0048] The circumferential heating elements reach their respective maximum temperatures before the bottom heating elements.

[0049] An embodiment of the present application also provides an aerosol generating device, comprising the heating component described in the above embodiment, and a power supply unit for providing electrical energy to the heating component.

[0050] The heating assembly provided in the above embodiment includes a heating tube and a heat conductor, wherein the heat conductor is arranged in the heating tube, the heating tube is used to heat the outer surface of the aerosol generating product of the heater, and the heat conductor is used to heat the bottom of the aerosol generating product, so that the aerosol generating product can be heated in the circumferential direction and the bottom respectively, so that the aerosol generating product can be heated more evenly and fully, and the heat conductor has a thermal conductivity of not less than 150 W / (m·K), so that the heat conductor can efficiently absorb and conduct the heat of the heating tube, thereby reducing heat loss and reducing power consumption.

Brief Description of the Drawings

[0051] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0052] Figure 1 A schematic diagram of the structure of an aerosol generating device provided in one embodiment of the present application;

[0053] Figure 2 for Figure 1 A schematic cross-sectional view of the heating assembly in one direction;

[0054] Figure 3 for Figure 1 A three-dimensional schematic diagram of the heating component in one direction;

[0055] Figure 4 A three-dimensional schematic diagram of a heating assembly provided in another embodiment in one direction;

[0056] Figure 5 A schematic cross-sectional view of a heating assembly in one direction provided by another embodiment;

[0057] Figure 6 A schematic cross-sectional view of a heating assembly in one direction provided by another embodiment;

[0058] Figure 7 A three-dimensional schematic diagram of a heating assembly provided by an embodiment supported in one direction;

[0059] Figure 8 for Figure 1 A schematic diagram of the exploded view of the heating assembly in one direction;

[0060] Fig. 9 A three-dimensional schematic diagram of a heat conducting member provided in another embodiment of the present application in one direction. [Specific implementation method]

[0061] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" / "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0062] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0063] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0064] In the embodiments of the present application, the "installation" includes fixing or restricting a component or device to a specific position or place by welding, screwing, clamping, bonding, etc. The component or device can remain stationary at the specific position or place or move within a limited range. After the component or device is fixed or restricted to a specific position or place, it may or may not be disassembled, and there is no limitation in the embodiments of the present application.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0066] An embodiment of the present application provides an aerosol generating device 100, such as Figure 1As shown, the aerosol generating device 100 includes a power supply unit 10, a main board 20 and a heating assembly 30. The main board 20 is provided with a controller of the aerosol generating device 100. The power supply unit 10 and the heating assembly 30 are electrically connected to the controller respectively, so that the controller can control the power supply unit 10 to provide electric energy to the heating assembly 30. The aerosol generating device 100 is also provided with a longitudinally extending chamber 40, and the chamber 40 is used to accommodate an aerosol generating product 200 used in conjunction with the aerosol generating device 100. When the aerosol generating product 200 is accommodated in the chamber 40, at least a part of the aerosol generating product 200 is located in the heating assembly 30, so that the heating assembly 30 can heat the aerosol generating product 200, and part of the active material filled in the aerosol generating product 200 can volatilize under heat to generate aerosol, and the user can inhale the aerosol by inhaling on the aerosol generating product 200. Among them, the power supply unit 10 is a rechargeable battery cell or a non-rechargeable battery cell.

[0067] The aerosol generating article 200 preferably uses a tobacco-containing material that releases volatile compounds from the article when heated; or it can also be a non-tobacco material that can be heated and suitable for electric heating and smoking. The aerosol generating article 200 preferably uses a solid substrate, which can include one or more of powder, particles, fragments, strips or sheets of one or more of herb leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; or the solid substrate can contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

[0068] like Figure 2 and Figure 3 As shown, the heating assembly 30 includes a heating tube 31 and a heating element 32 attached to the outer wall of the heating tube 31. The heating tube 31 has a first open end 312 and a second open end 313 that are arranged opposite to each other, and a receiving cavity 314 extending between the first open end 312 and the second open end 313. When the aerosol generating product 200 is received in the chamber 40, at least a portion of the aerosol generating product 200 can be received in the receiving cavity 314 through the first open end 312, that is, the first open end 312 can serve as an entrance for the aerosol generating product 200 to enter the receiving cavity 314. The heating element 32 can generate heat when it is powered on, and the heat generated by the heating element 32 can be transferred to the aerosol generating product 200 through the heating tube 31, thereby heating the outer surface of the aerosol generating product 200. In some embodiments, the heating element 32 is attached to the inner wall or the interior of the heating tube 31.

[0069] It should be noted that the aerosol generating product 200 is usually in the shape of a cigarette, with a top and a bottom relatively arranged along its length direction. The top is for the user to inhale, and the solid matrix filled in the aerosol generating product 200 is exposed at the bottom. The outer surface of the aerosol generating product 200 is the surface extending between the top and the bottom. When the user inhales, external air can enter the aerosol generating product 200 from the bottom.

[0070] The heating assembly 30 also includes a heat conductor 33 at least partially disposed in the receiving cavity 314. Specifically, the heat conductor 33 can be assembled into the heating tube 31 from the second open end 313 of the heating tube 31. The heat conductor 33 has a first surface 331 and a second surface 332 that are relatively disposed. The first surface 331 is used to support the aerosol generating product 200 accommodated in the receiving cavity 314. When the heating element 32 is energized, the heat of the heating element 32 is transferred to the heating tube 31, so that the heat conductor 33 can receive and transfer part of the heat on the heating tube 31, thereby allowing the heat conductor 33 to heat the bottom of the aerosol generating product 200.

[0071] Alternatively, in some embodiments, the first surface 331 may not need to support the aerosol generating product 200. For example, a protrusion (not shown) may be extended from the inner wall of the heating tube 31. When the aerosol generating product 200 is accommodated in the accommodating cavity 314, the bottom of the aerosol generating product 200 abuts against the protrusion, so that the protrusion provides support for the aerosol generating product 200. At this time, the heat conductor 33 maintains a suitable preset distance from the bottom of the aerosol generating product 200. In this way, the heat conductor 33 can also transfer heat to the aerosol generating product 200.

[0072] It is easy to understand that the heating tube 31 and the heat conductor 33 are both made of materials with high thermal conductivity to efficiently transfer the heat generated by the heating element 32 to the aerosol generating product 200. The materials of the heating tube 31 and the heat conductor 33 can be metal or ceramic materials, and the ceramic material can be any one of oxides, nitrides, carbides, borides, etc. Since the heat conductor 33 needs to transfer the heat of the heating tube 31 again, the heat conductor 33 needs to be made of a material with higher thermal conductivity. Preferably, when the thermal conductivity of the heat conductor 33 is not less than 150W / (m·K), the heat conductor 33 can effectively transfer heat to the aerosol generating product 200, thereby making the bottom of the aerosol generating product 200 better heated.

[0073] In some embodiments, the material of the thermal conductor 33 is graphite, which has a thermal conductivity of not less than 150 W / (m·K); or, in some embodiments, the material of the thermal conductor 33 is aluminum alloy, which has a thermal conductivity of not less than 200 W / (m·K); or, the material of the thermal conductor 33 can be copper, which has a thermal conductivity of not less than 380 W / (m·K).

[0074] Through the heating assembly 30 provided in this embodiment, since the heating tube 31 and the heat-conducting member 33 can heat the outer surface and the bottom of the aerosol-generating product 200 respectively, the aerosol-generating product 200 can be heated more fully and evenly, effectively improving the user's puffing taste. At the same time, the heat-conducting member 33 also effectively transfers the heat of the heating element 32, which can reduce the heat loss, and thus reduce the power consumption of the heating assembly 30.

[0075] It is worth noting that since the heating tube 31 heats the outer surface of the aerosol generating product 200, the heating tube 31 can also be called a circumferential heating element, and the heat conductive element 33 heats the bottom of the aerosol generating product 200, so the heat conductive element 33 can also be called a bottom heating element. By adjusting the maximum heating temperatures of the heating tube 31 and the heat conductive element 33, the aerosol generating product 200 can be heated sufficiently and evenly, thereby releasing an aerosol with a better taste. Preferably, the maximum heating temperature of the heating tube 31 is between 200°C and 300°C, and the maximum heating temperature of the heat conductive element 33 is between 150°C and 200°C.

[0076] The heating element 32 preferably adopts an infrared electric heating film layer coated on the outer wall or inner wall of the heating tube 31. After the infrared electric heating film layer is energized, on the one hand, it can generate heat, and the heat is transferred to the heating tube 31, so that the heating tube 31 heats the outer surface of the aerosol generating product 200; on the other hand, the infrared electric heating film layer is used to receive electric power to generate heat, and then generate infrared rays of a certain wavelength. When the wavelength of the infrared rays matches the absorption wavelength of the aerosol generating product 200, the energy of the infrared rays is easily absorbed by the aerosol generating product 200, thereby generating heat on the aerosol generating product 200, and the aerosol generating product 200 can be further heated.

[0077] In some other embodiments, the heating element 32 may also be a mesh-shaped resistive heating body coated on the outer wall of the heating tube 31, which can generate heat when powered on, and then transfer the heat to the heating tube 31. Or in some embodiments, the heating element 32 is a resistive film layer, which is printed on the outer wall of the heating tube 31 in a thick film heating manner. Or in some embodiments, the heating element 32 uses a flexible polyimide heater.

[0078] In the above embodiment, the heating tube 31 heats the aerosol generating article 200 by transferring the heat of the heating element 32. In some embodiments, the heating tube 31 can also generate heat by itself to heat the aerosol generating article 200. Specifically, the heating tube 31 can be made of an electric heating material, and 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 provide electric energy to the heating tube 31, and the heating tube 31 can generate heat by obtaining electric energy.

[0079] Alternatively, in some embodiments, an induction coil (not shown) is wound on the outer wall of the heating tube 31 or on a bracket outside the outer wall. The controller controls the power supply unit 10 to pass an alternating current into 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 and induces eddy currents in the heating tube 31. The heating tube 31 generates heat under the action of the eddy current effect and the hysteresis effect, thereby heating the aerosol generating product 200.

[0080] In order to induce eddy currents on the heating tube 31, the material of the heating tube 31 can be any one of graphite, molybdenum, silicon carbide, stainless steel, niobium, aluminum, nickel, iron, copper, nickel-containing compounds, titanium, and metal material composites. In some embodiments, in order to better induce eddy currents to improve heating efficiency, the material of the heating tube 31 is preferably ferromagnetic material or composed of ferromagnetic materials, such as ferrite iron, ferromagnetic alloys (such as ferromagnetic steel or stainless steel), ferromagnetic particles, and ferrites.

[0081] In some embodiments, Figure 3 As shown, the heating element 32 includes a first heating element 321 and a second heating element 322 which are spaced apart along the length direction of the heating tube 31. The first heating element 321 is correspondingly provided with a first electrode coating 3211 and a second electrode coating (not shown) which are spaced apart from each other and extend longitudinally, and the first heating element 321 is 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 extend longitudinally. When the heating element 32 is an infrared electric heating film layer, the corresponding electrode coating can be printed on the surface of the infrared electric heating film layer by printing, and the printed electrode can be connected to the main board 20 by welding wires or metal sheets, so that the main board 20 controls the supply of electric energy to the first heating element 321 and the second heating element 322 respectively.

[0082] The first heating element 321 is located above the second heating element 322, so that the first heating element 321 is used to heat the outer surface of the aerosol generating article 200, while 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, and then the heating tube 31 heats the outer surface of the aerosol generating article 200, while the heat generated by the second heating element 322 is first transferred to the heating tube 31, and then transferred to the heat conductive member 33 by the heating tube 31, and then the heat conductive member 33 heats the bottom of the aerosol generating article 200.

[0083] 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 has a maximum heating temperature greater than 250°C, preferably, the first heating element 321 has a maximum heating temperature of 260°C to 270°C; and the second heating element 322 has a maximum heating temperature 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 fully heated to release an aerosol with a better taste. The maximum heating temperature of the first heating element 321 is greater than the maximum heating temperature of the second heating element 322, which can better preheat the aerosol generating article 200, so that the aerosol generating article 200 has a better amount of smoke in the first few puffs of the puff.

[0084] Also, in some embodiments, the second electrode coating and the fourth electrode coating can be independently set and not electrically connected to each other. In this case, the first heating element 321 and the second heating element 322 respectively have two independent electrodes; or, in some embodiments, the second electrode coating and the fourth electrode coating are electrically connected to each other. In this case, the second electrode coating and the fourth electrode coating can be used as the negative electrode of the electrode and shared by the first heating element 321 and the second heating element 322.

[0085] Furthermore, in some embodiments, when the heating element 32 is an infrared electric heating film layer coated on the heating tube 31, the size of the area coated by the first heating element 321 and the second heating element 322 also has an impact on the sufficient heating of the aerosol generating article 200. Preferably, the size of the area coated by the first heating element 321 and the size of the area coated by the second heating element 322 are substantially the same, which is beneficial for sufficient heating of the aerosol generating article 200.

[0086] In some further embodiments, the first heating element 321 and the second heating element 322 can be heated simultaneously or independently. Preferably, the controller controls the first heating element 321 and the second heating element 322 to heat independently, so that in the early period of the heating cycle, the controller can control the first heating element 321 to output a larger power, so that the first heating element 321 heats up quickly, and then quickly heats the side of the aerosol generating article 200, and control the second heating element 322 to output a smaller power, so that the second heating element 322 heats up slowly, and then slowly heats the bottom of the aerosol generating article 200.

[0087] In the latter part of the heating cycle, the controller can control the first heating element 321 to output a relatively low power to maintain the temperature of the aerosol generating article 200, and control the second heating element 322 to output a relatively high power, so that the second heating element 322 starts to heat up rapidly, and then starts to heat the bottom of the aerosol generating article 200 rapidly. Therefore, by setting the first heating element 321 and the second heating element 322 to be independently controlled, the heating element 32 can be flexibly controlled to heat, so that the aerosol generating article 200 reaches the optimal temperature, thereby generating an aerosol with a better taste for the user to inhale.

[0088] Furthermore, in some embodiments, in order to enable the aerosol generating product 200 to generate an aerosol with a better taste, the controller may control the first heating element 321 to start heating before the second heating element 322, or the controller may control the first heating element 321 to reach the maximum heating temperature before the second heating element 322.

[0089] It is worth noting that, in some embodiments, Figure 4 As shown, only one heating element 32 is required. In this case, the heating element 32 basically extends between the first surface 331 and the second surface 332 so as to surround at least a portion of the heat conductor 33 . In this case, the heating element 32 only needs to have a pair of electrodes 34 .

[0090] In some embodiments, Figure 2As shown, the aerosol generating device 100 includes an air inlet 50 for external air to enter, and an air flow channel 60 connected to the air inlet 50. The heat conductive member 33 also includes a plurality of air channels 333 connected to the first surface 331 and the second surface 332. The air channels 333 are connected to the air flow channels 60. When the user inhales on the aerosol generating product 200, the external air can enter the aerosol generating product 200 from the bottom of the aerosol generating product 200 through the air flow channels 60 and the air channels 333, and then carry the aerosol generated by the heat volatilization in the aerosol generating product 200 for the user to inhale. In addition, when the external air flows through the air channel 333, the heat conductive member 33 can heat the external air. When the heated external air forms a hot air flow and enters the aerosol generating product 200, the aerosol generating product 200 can also be heated, thereby improving the heating efficiency.

[0091] Alternatively, the air channel 333 may not be connected to the outside air. When the heating assembly 30 is installed in the aerosol generating device, the airflow flowing through the air channel 333 is the air retained inside the aerosol generating device. The outside air enters through the air inlet of the aerosol generating product 200 itself. When the user inhales on the aerosol generating product 200, the retained air flows through the air channel and is heated by the heat conductive member 33, thereby forming a hot airflow to heat the aerosol generating product 200. Further, in some embodiments, when the heating element 31 is combined with the heating tube 31, at least a portion of the area extending from the first surface 331 of the heat conductive member 33 toward the second surface 332 is surrounded by the heating element 32, so that the heat conductive member 33 can better receive and transfer the heat from the heating tube 31. Furthermore, in some embodiments, the length of the surrounded area along the axial direction of the heating tube 31 is at least 5 cm. If the length of the heat conductor 33 surrounded by the heating element 32 is insufficient, the heat on the heat conductor 33 is insufficient to heat the bottom of the aerosol generating article 200 well, which will affect the concentration of the aerosol and cause the user's puffing taste to be poor.

[0092] Alternatively, in some embodiments, when the heating element 32 is composed of a first heating element 321 and a second heating element 322, the first heating element 321 surrounds the outer surface of the aerosol generating article 200, and the second heating element 322 surrounds the heat conductor 33, then at least a portion of the area where the first surface 331 of the heat conductor 33 extends toward the second surface 332 is surrounded by the second heating element 322.

[0093] In some embodiments, Figure 5As shown, in order to prevent the solid matrix remaining in the aerosol generating product 200 from falling into the air channel 333 after heating, which is not conducive to cleaning the heating component 30, the heat conductive member 33 cancels the setting of the air channel 333, and sets a groove 3311 on the first surface 331. The first surface 331 provides support for the bottom of the aerosol generating product 200. When the aerosol generating product 200 is supported on the first surface 331, the bottom of the aerosol generating product 200 and the groove 3311 define a space for storing air. When the space is connected to the outside air, the outside air can enter the groove 3311 through the gap between the heating tube 31 and the aerosol generating product 200, that is, enter the space 3311, and then enter the aerosol generating product 200. At the same time, when the outside air flows through the space 3311, the outside air can also be heated by the heat conductive member 33 to form a hot air flow. When the hot air flow enters the aerosol generating product 200, it can also play a heating role.

[0094] Alternatively, in some embodiments, the space 3311 may not be connected to the external air. When the heating component 30 is installed in the aerosol generating device, the airflow flowing through the space 3311 is the air retained inside the aerosol generating device, and the external air enters through the air inlet of the aerosol generating product 200 itself. When the user inhales on the aerosol generating product 200, the retained air flows through the space 3311 and is heated by the heat conductor 33, thereby forming a hot airflow to heat the aerosol generating product 200.

[0095] And, in some embodiments, as Figure 5 As shown, in order to guide external air into the above-mentioned groove 3311, the groove wall of the groove 3311 is provided with a through hole 3312. The through holes 3312 can be multiple and spaced from each other in the circumferential direction so as to guide more external air into the groove 3311.

[0096] And, in some embodiments, as Figure 5 As shown, the groove 3311 needs to have a suitable depth d. If the depth d of the groove 3311 is too large, the groove 3311 is equivalent to an air medium layer, and the air medium layer will play a role of heat insulation, thereby affecting the effect of the heat conductor 33 heating the bottom of the aerosol generating product 200. Preferably, the depth d of the groove 3311 is not greater than 1.5 mm to avoid the groove 3311 forming an air medium layer; or, more preferably, the depth d of the groove 3311 is not greater than 1 mm.

[0097] In some embodiments, as 7 and Figure 8As shown, in order to fix the heat conductor 33 in the heating tube 31, an extension wall 3321 extends longitudinally from the second surface 332, and a slot 3323 is formed on the outer surface of the extension wall 3321. The tube wall of the heating tube 31 is correspondingly provided with a through hole 311. When the heat conductor 33 is accommodated in the heating tube 31, the slot 3323 and the through hole 311 are correspondingly connected. The heating component 30 also includes a connector 3324 for connecting the heat conductor 33 and the heating tube 31. Specifically, the connector 3323 can be passed through the through hole 311 from the outside of the heating component 30 and then inserted into the slot 3323, thereby connecting the heat conductor 33 and the heating tube 31, so that the heat conductor 33 is fixed in the heating tube 31.

[0098] like Figure 7 As shown, the second surface 332 and the extension wall 3321 define a heat-insulating 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 extension wall 3321 do not overlap in the longitudinal direction. Due to the existence of the heat-insulating space 3322, the heat of the heated area of ​​the heat conductor 33 will be difficult to transfer outward, which is beneficial to maintaining the heat of the heat conductor 33.

[0099] Further in some embodiments, Figure 7 As shown, a boss 3325 is formed on the inner surface of the extension wall 3321, and the slot 3323 extends into the boss 3325, so that the connecting member 3323 can be further inserted into the slot 3323, so as to more stably connect the heat conducting member 33 and the heating tube 31.

[0100] It should be noted that the slot 3323 may not be set on the extension wall 3321. In some embodiments, the slot 3323 may also be set on the outer surface between the first surface 331 and the second surface 332 of the heat conductor 33. In this case, the slot 3323 needs to avoid the air channel 333 to prevent the hot air in the air channel 333 from leaking through the slot 3323, thereby reducing the heating efficiency of the heat conductor 33.

[0101] It is worth noting that, in some embodiments, the heating tube 31 is attached with a heating element 32 such as the infrared electric heating coating, and 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 arranged in the heat conducting member 33, such as Fig. 9As shown, a central heating element 334 is provided in the central area of ​​the heat-conducting element 33. The central heating element 334 has an electrode lead 3341. The electrode lead 3341 is electrically connected to the main board 20. Then, the controller can control the power supply unit 10 to provide electric energy to the central heating element 334. The central heating element 334 can generate heat when it obtains electric energy. The central heating element 334 penetrates the first surface 331 and the second surface 332 of the heat-conducting element 33, and the end of the central heating element 334 is configured in a pin shape or a sheet shape so that the central heating component 334 can be inserted into the aerosol generating article 200 for heating. At this time, when the heating element 32 is wrapped around the heating tube 31, it avoids the heat-conducting element 33.

[0102] Alternatively, in some embodiments, the central heating element 334 does not extend out of the first surface 331 , and the central heating element 334 is mainly used to heat the air in the air channel 333 , and the heated air forms a hot air flow to heat the bottom of the aerosol generating article 200 .

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heating assembly, applied to an aerosol generating device, for heating an aerosol generating product to generate an aerosol, characterized in that: include: a heating tube for receiving at least a portion of the aerosol generating product and heating an outer surface of the aerosol generating product; a heat conducting member, at least partially located in the heating tube; The heat conductor is used to receive and transfer part of the heat of the heating tube, thereby heating the bottom of the aerosol generating product, and the thermal conductivity of the heat conductor is not less than 150 W / (m·K).

2. The heating assembly according to claim 1, characterized in that The outer wall of the heating tube is combined with a heating element, and the heating tube transfers the heat generated by the heating element to the aerosol generating article and the heat conducting member; Wherein, the heating element includes an infrared electric heating film layer, a resistance film layer or a resistance heating body arranged on the heating tube.

3. The heating assembly according to claim 2, characterized in that The heating element comprises a first heating element and a second heating element distributed along the length direction of the heating tube, the first heating element is used to heat the outer surface of the aerosol generating article, and the second heating element is used to heat the heat conducting member.

4. The heating assembly according to claim 3, characterized in that The first heating element and the second heating element are configured to be heated independently.

5. The heating assembly according to claim 3, characterized in that: The first heating element has a maximum temperature greater than 250°C and the second heating element has a maximum temperature less than 250°C.

6. The heating assembly according to claim 3, characterized in that The first heating element comprises a first infrared electric heating film layer coated on the first section of the heating tube, and a first electrode coating and a second electrode coating arranged on the first infrared electric heating film layer; The second heating element comprises a second infrared electric heating film layer coated on the second section of the heating tube, and a third electrode coating and a fourth electrode coating arranged on the second infrared electric heating film layer; The first electrode coating, the second electrode coating, the third electrode coating and the fourth electrode coating all extend along the longitudinal direction of the heating tube, and the first infrared electric heating film layer and the second infrared electric heating film layer are arranged at intervals.

7. The heating assembly according to claim 6, characterized in that The area coated by the first infrared electrothermal film layer is substantially the same as the area coated by the second infrared electrothermal film layer.

8. The heating assembly according to claim 1, characterized in that The heat conductive member has a first surface and a second surface disposed opposite to each other, wherein the first surface faces toward and is close to an inlet for providing the aerosol generating article to enter the heating tube; Wherein, the first surface is used to support the bottom of the aerosol generating article.

9. The heating assembly according to claim 1, characterized in that The inner wall of the heating tube has a convex surface, and the convex surface is used to support the bottom of the aerosol generating article so that the heat conductive member has a preset distance from the bottom of the aerosol generating article.

10. The heating assembly according to claim 1, characterized in that The heat conductive member has a first surface and a second surface disposed opposite to each other, wherein the first surface faces toward and is close to an inlet for providing the aerosol generating article to enter the heating tube; The heat conducting member has at least one air channel connecting the first surface and the second surface, and the heat conducting member is used to heat the air flow in the air channel.

11. The heating assembly according to claim 1, characterized in that The heat conductive member has a first surface and a second surface disposed opposite to each other, wherein the first surface faces toward and is close to an inlet for providing the aerosol generating article to enter the heating tube; The heat-conducting member has a groove formed on the first surface, and a space for storing air is defined between the bottom of the aerosol generating product and the groove.

12. The heating assembly according to claim 11, characterized in that The first surface supports a bottom of the aerosol-generating article.

13. The heating assembly according to claim 11, characterized in that The groove has a depth of no more than 1.5 mm, and preferably, the groove has a depth of no more than 1 mm.

14. The heating assembly according to claim 11, characterized in that A through hole for guiding external air into the groove is provided on the groove wall of the groove.

15. The heating assembly according to claim 2, characterized in that The heat conductive member has a first surface and a second surface disposed opposite to each other, wherein the first surface faces toward and is close to an inlet for providing the aerosol generating article to enter the heating tube; At least a portion of the heat conducting member extending from the first surface toward the second surface is surrounded by the heating element.

16. The heating assembly according to claim 15, characterized in that The length of the partial area along the axial direction of the heating component is greater than 5 mm.

17. The heating assembly according to claim 15, characterized in that The heat conducting member has an extension wall extending from the second surface in the longitudinal direction; The outer surface of the extension wall is formed with a slot, the tube wall of the heating tube is formed with a through hole, and the heating assembly also includes a connecting piece inserted into the slot through the through hole to connect the heat conductor and the heating tube.

18. The heating assembly according to claim 17, characterized in that A boss is formed on the inner surface of the extension wall, and the slot extends into the boss.

19. The heating assembly according to claim 17, characterized in that The heating element does not overlap the extension arm in the longitudinal direction.

20. The heating assembly according to claim 1, characterized in that The heat conducting member includes at least one of graphite, aluminum alloy or copper.

21. A heating assembly, applied to an aerosol generating device, for heating an aerosol generating product to generate an aerosol, characterized in that: include: a circumferential heating element, wherein a receiving cavity is provided inside the circumferential heating element, and is used to receive at least a portion of the aerosol generating product and heat the outer surface of the aerosol generating product; a bottom heating element, at least partially located in the receiving cavity, for heating the bottom of the aerosol generating article; Wherein, the maximum temperature of the circumferential heating element is between 200°C and 300°C, and the maximum temperature of the bottom heating element is between 150°C and 200°C.

22. The heating assembly according to claim 21, characterized in that The bottom heating element receives and transfers part 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 element is not less than 150 W / (m·K); or the bottom heating element includes at least one of graphite, aluminum alloy or copper.

23. The heating assembly according to claim 21, characterized in that The bottom heating element has a first surface and a second surface arranged opposite to each other, and an air channel connecting the first surface and the second surface; the bottom heating element can conduct heat to heat the air in the air channel, so that the heated air enters the interior of the aerosol generating product and is heated.

24. The heating assembly according to claim 21, characterized in that The bottom heating element has a groove, and the bottom heating element can conduct heat to heat the air in the groove, so that the heated air enters into the aerosol raw product and is heated.

25. The heating assembly according to claim 21, characterized in that The circumferential heating element comprises a heating element and a heating tube, the bottom heating element is arranged inside the heating tube, and the heating element is arranged around the heating tube and the bottom heating element; or The circumferential heating element comprises a first heating element, a second heating element and a heating tube, wherein the bottom heating element 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 conductive element.

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 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.

27. The heating assembly of claim 21, wherein: The circumferential heating element generates heat before the bottom heating element; or The circumferential heating elements reach their respective maximum temperatures before the bottom heating elements.

28. An aerosol generating device, characterized in that: It comprises the heating component according to any one of claims 1 to 27, and a power supply unit for providing electrical energy to the heating component.

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