Heating component and aerosol generating apparatus including the heating component

Abstract

This application relates to a heating assembly and an aerosol generating apparatus including the heating assembly, comprising: a first tubular body having an internal cavity for accommodating at least a portion of an aerosol generating article; a second tubular body being disposed around the periphery of the first tubular body, with an airflow channel between the first and second tubular bodies for guiding external airflow to the cavity; and a heating element being disposed at least partially between the first and second tubular bodies to heat the airflow channel, with a gap between the heating element and both the first and second tubular bodies.

Description

Technical Field

[0001] This application relates to the technical field of aerosol generation, and in particular to a heating component and an aerosol generation apparatus including the heating component. Background Technology

[0002] An aerosol generating apparatus is a device that produces aerosols without combustion of the aerosol-generating product. A typical aerosol generating apparatus includes a holding tube for containing the aerosol-generating product and a porous heater positioned below the holding tube. The porous heater heats air to create hot air, which then flows into the aerosol-generating product to heat it. However, because the porous heater is positioned below the holding tube, condensate from the returning aerosols and tar permeating from the aerosol-generating product flow into the porous heater under gravity, forming carbon deposits in the heater's pores. These carbon deposits clog the pores, thus affecting the airflow into the aerosol-generating product. Utility Model Content

[0003] The purpose of this application is to provide a heating component and an aerosol generating device including the heating component, which can prevent airflow channel blockage.

[0004] At least one embodiment of this application provides a heating assembly, the heating assembly comprising:

[0005] The first tubular body has an internal cavity for accommodating at least a portion of the aerosol-generated article;

[0006] A second tubular body is arranged around the periphery of the first tubular body, and an airflow channel is provided between the first and second tubular bodies to guide external airflow into the receiving cavity; and

[0007] A heating element is disposed between the first tubular body and the second tubular body to heat the air in the airflow channel, and there is a gap between the heating element and both the first tubular body and the second tubular body.

[0008] As an example, the heating element includes a heating body, a first pin, and a second pin, the first pin and the second pin being electrically connected to opposite ends of the heating body, and the first pin and the second pin being located on the same side of the heating body.

[0009] As an example, the outer wall of the first tubular body includes a first portion and a second portion protruding toward the second tubular body relative to the first portion, the heating element having a gap with the first portion, and the heating element contacting the second portion to transfer heat to the inner wall of the first tubular body through the second portion.

[0010] As an example, the heating element is spirally wrapped around the periphery of the first tubular body, and the second portion abuts the heating element radially.

[0011] As an example, a protrusion is provided on the outer wall of the first tubular body, and the heating element is wound around the protrusion at least half a turn, such that the heating element forms a first heating body extending spirally from the protrusion around the first tubular body and a second heating body extending spirally from the protrusion around the first tubular body.

[0012] As an example, the first heating element and the second heating element are arranged in parallel, such that the first heating element and the second heating element have the same helical orientation; or

[0013] The first heating element and the second heating element have opposite helical directions.

[0014] As an example, the outer wall of the first tubular body includes a ridge protruding toward the second tubular body relative to the first portion, the ridge including a plurality of second portions and a plurality of third portions, at least a portion of the heating element is wound around the ridge, and at least one of the third portions is disposed between two adjacent turns of the heating element.

[0015] As an example, the opposite ends of the ridge are staggered in the axial direction;

[0016] The tube has a plurality of said ridges, and the plurality of said ridges are arranged staggered along the circumference of the first tubular body, with two adjacent said ridges separated by a first portion.

[0017] As an example, the second part includes a plurality of first support portions and a plurality of second support portions;

[0018] The heating element is alternately wound around a plurality of first support portions and a plurality of second support portions at least half a turn, such that at least a portion of the heating element extends in a wave pattern around the periphery of the first tubular body, and the first support portions abut against the heating element along a first direction, and the second support portions abut against the heating element along a second direction, wherein the first direction is opposite to the second direction.

[0019] As an example, a plurality of first support portions are arranged in a first ring at intervals along the circumference of the first tubular body, and a plurality of second support portions are arranged in a second ring at intervals along the circumference of the first tubular body. The first ring and the second ring are staggered in the axial direction, and the first direction and the second direction are parallel to the axial direction.

[0020] As an example, any two adjacent first support portions have equal circumferential spacing; and / or

[0021] Any two adjacent second support portions have an equal circumferential spacing; and / or

[0022] The circumferential distance between two adjacent first support portions is equal to the circumferential distance between two adjacent second support portions; and / or

[0023] The circumferential width of the first support portion is equal to the circumferential spacing between two adjacent first support portions; and / or

[0024] The circumferential width of the second support portion is equal to the circumferential spacing between two adjacent second support portions; and / or

[0025] The orthographic projections of the plurality of first support portions in the axial direction and the orthographic projections of the plurality of second support portions in the axial direction are staggered; and / or

[0026] At least some of the ripples on the heating element resemble square or triangular waves.

[0027] As an example, the radial distance between the heating element and the first portion is less than the radial distance between the heating element and the second tubular body.

[0028] As an example, the first tubular body includes an annular sidewall surrounding the receiving cavity and a base for supporting the end of the aerosol-generating article, wherein the annular sidewall and / or the base are provided with air holes for communicating the airflow channel and the receiving cavity.

[0029] As an example, the first tubular body further has a first collection space communicating with the receiving cavity, the base defines the bottom boundary of the first collection space, and the base is provided with a plurality of support platforms for supporting the end of the aerosol generating article, the plurality of support platforms being arranged around the first collection space; and / or

[0030] The heating assembly further includes a lower end cap connected to the second tubular body, and a second collection space is provided between the lower end cap and the base. The second collection space is located on the side of the vent opposite to the airflow channel, and the second collection space communicates the vent and the airflow channel; and / or

[0031] The air hole formed on the annular sidewall is located adjacent to the base.

[0032] As an example, the second tubular body may include an insulated tube or a vacuum tube.

[0033] As an example, the first tubular body includes a proximal end and a distal end disposed opposite to each other, the proximal end of the first tubular body providing an inlet for the aerosol-generating article to enter the receiving cavity, and the airflow channel for guiding air to flow from the proximal end of the first tubular body to the distal end of the first tubular body.

[0034] As an example, at least a portion of the heating element is located in the airflow channel or the heating element defines a portion of the boundary of the airflow channel.

[0035] At least one embodiment of this application provides an aerosol generating apparatus, which includes a power source and the heating element, wherein the power source provides energy to generate heat for the heating element.

[0036] The heating assembly and aerosol generating apparatus including the heating assembly provided in the above embodiments include a heating element, a first tubular body for containing at least a portion of the aerosol generating article, and a second tubular body disposed around the periphery of the first tubular body. An airflow channel for guiding air into the interior of the first tubular body is provided between the first and second tubular bodies. The heating element is disposed between the first and second tubular bodies to heat the air in the airflow channel, and gaps are provided between the heating element and both the first and second tubular bodies. This not only prevents liquid and aerosol generating article residues from entering the airflow channel under gravity, helping to prevent blockage, but also reduces the absorption of heat released by the heating element by the first and second tubular bodies through the gaps, thus improving energy utilization and reducing power consumption. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar parts or portions are generally identified by similar reference numerals. In the drawings, the parts or portions are not necessarily drawn to scale.

[0038] Figure 1 This is a schematic diagram of an aerosol generating apparatus provided in some embodiments of this application;

[0039] Figure 2 This is a cross-sectional view of a heating assembly provided in some embodiments of this application;

[0040] Figure 3 This is an exploded view of the heating assembly provided in some embodiments of this application;

[0041] Figure 4 This is a schematic diagram of a heating element held on a first tubular body according to some embodiments of this application;

[0042] Figure 5 This is a schematic diagram of the first tubular body provided in some embodiments of this application;

[0043] Figure 6 This is a schematic diagram of a heating element provided in some embodiments of this application;

[0044] Figure 7 This is a cross-sectional view of a heating assembly provided in other embodiments of this application;

[0045] Figure 8 This is a schematic diagram showing the heating element held on the first tubular body according to other embodiments of this application;

[0046] Figure 9 This is a schematic diagram of the first tubular body provided in other embodiments of this application;

[0047] Figure 10 This is a schematic diagram of a heating element provided in other embodiments of this application;

[0048] In the picture:

[0049] 100. Aerosol-generating products; 110. Aerosol-forming matrices;

[0050] 200. Heating component; 300. Power source; 310. Battery; 320. Circuit board;

[0051] 1 / 1′, Heating element; 11 / 11′, Heating body; 111, First heating body; 112, Second heating body; 12 / 12′, First pin; 13 / 13′, Second pin;

[0052] 2 / 2′, First tubular body; 21, Receiving cavity; 22 / 22′, First part; 23 / 23′, Second part; 231, First support part; 2311, First groove; 232, First support part; 2321, Second groove; 24, Protrusion; 25, Ridge; 26, Third part; 27, Annular sidewall; 28, Base; 281, Embedding groove; 29, Air hole; 20, First collection space; 2a, Support platform;

[0053] 3. Second tubular body; 4. Airflow channel; 5. Lower end cover; 6. Second collection space; 7. Support; 8. Ventilation gap; 9. Sealing ring; 10. Upper end cover. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0055] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship or movement of the components in a specific orientation (as shown in the accompanying drawings). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0056] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0057] It should be noted that when a part is referred to as being "fixed to" another part, it can be directly on the other part or there may be an intermediate part. When a part is referred to as being "connected to" another part, it can be directly connected to the other part, or there may be one or more intermediate parts present simultaneously. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0058] Please refer to Figure 1 This application provides an aerosol generating apparatus, which includes a heating component 200 for heating an aerosol generating article 100 so that the aerosol generating article 100 does not burn to generate aerosol.

[0059] As used herein, the term "aerosol generating article" refers to an article comprising an aerosol forming matrix 110 that, when heated, releases volatile compounds that can form aerosols. "Aerosol generating article" also refers to an article comprising an aerosol forming matrix intended to be heated rather than burned to release volatile compounds that can form aerosols. Aerosols formed by heating an aerosol forming matrix may contain fewer known hazardous components than aerosols generated by combustion or pyrolytic degradation of the aerosol forming matrix. In some embodiments, the aerosol generating article may be removably coupled to an aerosol generating device. The article may be disposable or reusable.

[0060] As used herein, the term "aerosol-forming matrix" refers to a matrix capable of releasing volatile substances to form an inhalable aerosol. The aerosol-forming matrix may include tobacco-containing material containing volatile tobacco flavor compounds that are released from the matrix upon heating. Specifically, the aerosol-forming matrix may be a tobacco-containing aerosol-forming matrix, preferably a solid tobacco-containing aerosol-forming matrix. Alternatively, the aerosol-forming matrix may include non-tobacco materials. The aerosol-forming matrix may also include an aerosol-forming agent. Examples of suitable aerosol-forming agents are glycerol and propylene glycol.

[0061] The aerosol forming matrix may include one or more of the following: powder, granules, pellets, flakes, strips, bands, or sheets, containing one or more of the following: herbaceous plant leaves, tobacco leaves, tobacco vein fragments, reconstituted tobacco, homogenized tobacco, extruded tobacco, and expanded tobacco.

[0062] When the aerosol forming matrix is ​​a solid aerosol forming matrix, the aerosol-generated products can be cigarettes, cigarette sticks, or cigars, etc.

[0063] The aerosol-forming matrix may include a liquid aerosol-forming matrix. The liquid aerosol-forming matrix may contain a liquid containing tobacco-containing substances with volatile tobacco flavor components, or it may contain a liquid containing non-tobacco substances. The liquid aerosol-forming matrix may contain water, solvents, ethanol, plant extracts, fragrances, flavorings, or vitamin mixtures, etc. Fragrances may include areca nut extract, menthol, peppermint, spearmint oil, various fruit flavor components, etc., but are not limited to these. Flavorings may contain ingredients that can provide the user with various fragrances or flavors. Vitamin mixtures may be mixtures containing at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but are not limited to these. When the aerosol-forming matrix is ​​a liquid aerosol-forming matrix, the aerosol-generating product may be a cartridge or an atomizer, etc.

[0064] In some embodiments, the aerosol generating apparatus further includes a power source 300, which provides energy for heating the heating component 200.

[0065] The power source 300 may include any suitable battery 310. In some embodiments, the battery 310 includes a lithium-ion battery. Alternatively, the battery 310 may include a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery. The power source 300 may include a circuit board 320 and one or more control circuits disposed on the circuit board 320. The control circuits may control the output of the battery 310, such as causing the battery 310 to output alternating current or direct current, or, for example, causing the battery to output current or voltage in the form of pulses.

[0066] The control circuit may include one or more controllers. These controllers can control the overall operation of the aerosol generating device. Specifically, the controllers control not only the operation of the battery and heating components, but also the operation of other components within the aerosol generating device. Furthermore, the controllers can determine whether the aerosol generating device is operable by checking the status of its components. The controller includes at least one processor. The processor may include a logic gate array, or a combination of a general-purpose microprocessor and a memory storing executable programs from the microprocessor. Moreover, those skilled in the art will understand that the controller may include another type of hardware.

[0067] In some embodiments, reference may be made to Figure 2 and Figure 7 The heating assembly 200 includes a heating element 1 / 1′, a first tubular body 2 / 2′, and a second tubular body 3 arranged around the periphery of the first tubular body 2 / 2′. The first tubular body 2 / 2′ has a receiving cavity 11 for at least partially accommodating the aerosol-generating article 100. An airflow channel 4 is provided between the first tubular body 2 / 2′ and the second tubular body 3 to guide external airflow to the receiving cavity. Thus, the airflow channel 4 is at least partially located on the radially outer side of the receiving cavity 21, preventing liquid in the receiving cavity 21 and residue falling from the aerosol-forming matrix 110 from entering the airflow channel under their own gravity, thereby helping to prevent blockage of the airflow channel 4.

[0068] The heating element 1 / 1′ is at least partially disposed between the first tubular body 2 / 2′ and the second tubular body 3 to heat the air in the airflow channel 4, thereby forming hot air. The hot air can flow into the receiving cavity 21, thereby heating the aerosol forming matrix 110 inside the aerosol generating article 100 to generate aerosol.

[0069] In some embodiments, there is a gap between the heating element 1 / 1′ and the first tubular body 2 / 2′ and the second tubular body 3.

[0070] The gap between the heating element 1 / 1′ and the second tubular body 3 increases the thermal resistance between them, thereby reducing the heat loss from the heating element 1 / 1′ to the second tubular body 3 and preventing heat dissipation through the heating element 1 / 1′. This helps to concentrate the heat from the heating element 1 / 1′ on the airflow channel 4, improving heat utilization. Preferably, the inner wall of the second tubular body 3 is spaced apart from the heating element 1 / 1′, so that there is no direct contact between the second tubular body 3 and the heating element 1 / 1′. More preferably, at least a portion of the airflow channel 4 is disposed between the inner wall of the second tubular body 3 and the heating element 1 / 1′.

[0071] The gap between the heating element 1 / 1′ and the first tubular body 2 / 2′ increases the thermal resistance between them, thereby reducing the heat loss from the heating element 1 / 1′ to the first tubular body 2 / 2′. This helps to concentrate the heat from the heating element 1 / 1′ on the airflow channel 4, improving heat utilization. Preferably, the heating element 1 / 1′ is closer to the first tubular body 2 / 2′ than the second tubular body 3, so that when the heating element 1 / 1′ is working, the temperature of the first tubular body 2 / 2′ is higher than that of the second tubular body 3. This allows the first tubular body 2 / 2′ to heat or keep the aerosol generating product 100 in the receiving cavity 21 warm, helping to reduce the radial outward heat loss of the aerosol generating product 100 in the receiving cavity 21 and preventing the temperature from dropping too quickly when hot air flows in the aerosol generating product 100. Preferably, at least a portion of the airflow channel 4 is disposed between the outer wall of the first tubular body 2 / 2′ and the heating element 1 / 1′.

[0072] In some embodiments, the heating element 1 / 1′ includes a sensor. As used herein, the term "sensor" refers to a material capable of converting electromagnetic energy into heat. When located within a changing electromagnetic field, eddy currents induced in the sensor cause heating of the sensor. In such embodiments, the sensor is designed to engage with an aerosol generating device or heating assembly including a magnetic field generator. The magnetic field generator generates a changing magnetic field to heat the sensor located within the changing magnetic field. In use, the sensor is located within the changing magnetic field generated by the magnetic field generator. The magnetic field generator is electrically connected to a power source that provides current to the magnetic field generator to produce the changing magnetic field. The magnetic field generator may include one or more induction coils that generate the changing magnetic field, and the one or more induction coils may surround the sensor. In some embodiments, the aerosol generating device is capable of generating a changing magnetic field between 1 MHz and 30 MHz, for example, between 2 MHz and 10 MHz, or for example, between 5 MHz and 7 MHz. In some embodiments, the aerosol generating apparatus is capable of generating a magnetic field with a varying field strength (H field) between 1 kA / m and 5 kA / m, for example between 2 kA / m and 3 kA / m, for example about 2.5 kA / m.

[0073] The sensing element may include a metal or carbon. In some embodiments, the sensing element may include a ferromagnetic material, such as ferrite, ferromagnetic steel, or stainless steel. In some embodiments, the sensing element includes a nickel-iron alloy. In some embodiments, the sensing element includes 400 series stainless steel, which includes grade 410, 420, or 430 stainless steel. When positioned within an electromagnetic field with similar frequency and field strength values, different materials will dissipate different amounts of energy. Therefore, the parameters of the sensing element, such as material type, length, width, and thickness, can all be varied to provide the desired power dissipation within a known electromagnetic field.

[0074] In some embodiments, the heating element 1 / 1′ comprises a resistive material. Suitable resistive materials include, but are not limited to: semiconductors, such as doped ceramics, conductive ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic and metallic materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, constantan, nickel-containing alloys, cobalt-containing alloys, chromium-containing alloys, aluminum-containing alloys, titanium-containing alloys, zirconium-containing alloys, hafnium-containing alloys, niobium-containing alloys, molybdenum-containing alloys, tantalum-containing alloys, tungsten-containing alloys, tin-containing alloys, gallium-containing alloys, manganese-containing alloys, and iron-containing alloys, as well as nickel-, iron-, and cobalt-based superalloys, stainless steel, iron-aluminum-based alloys, and iron-manganese-aluminum-based alloys. In composite materials, the resistive material may be embedded in, encapsulated by, or coated with an insulating material, or vice versa, depending on the energy transfer kinetics and desired external physicochemical properties. The heating assembly may include a metal etched foil that acts as an insulator between two layers of inert material. In this case, the inert material may include polyimide or mica foil, etc.

[0075] In such Figure 3 and Figure 8 In the embodiment shown, the heating element 1 / 1′ includes a resistance heating wire or a resistance heating strip.

[0076] In some embodiments, reference may be made to Figure 6 and Figure 10 The heating element 1 / 1′ needs to obtain heat energy through electrical connection with the power source 300. Based on this, the heating element 1 / 1′ includes a heating body 11 / 11′, a first pin 12 / 12′, and a second pin 13 / 13′. The first pin 12 / 12′ and the second pin 13 / 13′ are electrically connected to opposite ends of the heating body 11 / 11′. The heating element 1 / 1′ generates heat primarily through the heating body 11 / 11′, which is electrically connected to the power source 300 via the first pin 12 / 12′ and the second pin 13 / 13′. In some embodiments, the heating body 11 / 11′ and the pins are made of the same material. In some embodiments, the resistivity of the material of the heating body 11 / 11′ is greater than the resistivity of the material of the pins.

[0077] In some embodiments, reference may be made to Figure 6 and Figure 10The first pin 12 / 12′ and the second pin 13 / 13′ are located on the same side of the heating body 11 / 11′. This helps to shorten the pin length and increases the proportion of the heating body 11 / 11′ in the heating element 1 / 1′. In other embodiments, the first pin 12 / 12′ and the second pin 13 / 13′ may also be located on opposite sides of the heating body 11 / 11′.

[0078] In some embodiments, the first tubular body 2 / 2′ is configured to contact the heating element 1 / 1′ to absorb a portion of the heat released by the heating element 1 / 1′ and transfer at least a portion of the absorbed heat inward to heat the aerosol generating article 100 located in the receiving cavity 21. Preferably, when the aerosol generating article 100 is engaged with the heating assembly 200, the aerosol forming matrix 110 is located in the receiving cavity 21, so that the first tubular body 2 / 2′ can externally heat the aerosol forming matrix 110.

[0079] In some embodiments, the air in the airflow channel 4 absorbs more heat from the heating element 1 / 1′ than the first tubular body 2 / 2′ absorbs from the heating element 1 / 1′, thereby causing the maximum temperature of the air flowing from the airflow channel 4 to the receiving cavity 21 to be greater than the temperature of the first tubular body 2 / 2′. In other embodiments, the maximum temperature of the air flowing from the airflow channel 4 to the receiving cavity 21 may be equal to the temperature of the first tubular body 2 / 2′.

[0080] In some embodiments, reference may be made to Figure 5 and Figure 9 The first tubular body 2 / 2′ has an uneven outer wall, so that when the heating element 1 / 1′ is placed outside the first tubular body 2 / 2′, it cannot fully fit with the outer wall of the first tubular body 2 / 2′, thereby limiting the first tubular body 2 / 2′ from absorbing heat from the heating element 1 / 1′.

[0081] More specifically, the outer wall of the first tubular body 1 / 1′ includes a first portion 22 / 22′ and a second portion 23 / 23′ that protrudes towards the second tubular body 3 relative to the first portion 22 / 22′, such that the radial distance between the first portion 22 / 22′ and the second tubular body 3 is greater than the radial distance between the second portion 23 / 23′ and the second tubular body 3. A gap exists between the heating element 1 / 1′ and the first portion 22 / 22′, and the heating element 1 / 1′ contacts the second portion 23 / 23′, thereby allowing the heating element 1 / 1′ to transfer heat to the inner wall of the first tubular body 2 / 2′ through the second portion 23 / 23′.

[0082] Furthermore, the heating element 1 / 1′ can be stably held on the first tubular body 2 / 2′ by connecting it to the second part 23 / 23′. When assembling the heating assembly 200, the heating element 1 / 1′ can be held on the first tubular body 2 / 2′ to form a combination of the heating element 1 / 1′ and the first tubular body 2 / 2′, and then the combination can be assembled into the second tubular body 3.

[0083] In some embodiments, reference may be made to Figure 2 and Figure 7 The radial distance between the heating element 1 / 1′ and the first part 22 / 22′ is smaller than the radial distance between the heating element 1 / 1′ and the second tubular body 3. Therefore, the first part 22 / 22′ receives the heat radiation from the heating element 1 / 1′ more easily than the second tubular body 3.

[0084] In some embodiments, reference may be made to Figures 2-6 The heating element 1 is spirally wound around the periphery of the first tubular body 2, and the second part 23 abuts against the heating element 1 radially. The heating body 11 can be first wound into a spiral shape, and then the spiral heating body 11 can be joined to the first tubular body 2, so that the second part 23 abuts against the heating body 11 radially. Alternatively, the heating body 11 can be wound along the outer wall of the first tubular body 2, so that while the heating body 11 forms a spiral shape, the heating element 1 is also joined to the first tubular body 2, and the second part 23 abuts against the heating body 11 radially.

[0085] As an example, you can refer to Figure 4 and Figure 5 A protrusion 24 is provided on the outer wall of the first tubular body 2. The heating element 1 is wrapped around the protrusion 24 at least half a turn, so that the heating element 1 forms a first heating body 111 that extends spirally from the protrusion 24 around the first tubular body 2 and a second heating body 112 that extends spirally from the protrusion 24 around the first tubular body 2.

[0086] Furthermore, one end of the first heating body 111 is connected to the protrusion 24, and the other end is connected to the first pin 12, or the other end extends to form the first pin 12; one end of the second heating body 112 is connected to the protrusion 24, and the other end is connected to the second pin 13, or the other end extends to form the second pin 13. The end of the first heating body 111 connected to the protrusion 24 and the end of the second heating body 112 connected to the protrusion 24 are electrically connected, thereby connecting the first heating body 111 and the second heating body 112 in series between the first pin 12 and the second pin 13.

[0087] As an example, you can refer to Figure 4The first heating body 111 and the second heating body 112 are arranged in parallel, so that the first heating body 111 and the second heating body 112 have the same helical winding direction. For example, the middle part of the heating element 1 can be folded back 180° using the protrusion 24 as a fulcrum to form the first heating body 111 and the second heating body 112. Then, the first heating body 111 and the second heating body 112 are wound around the periphery of the first tubular body 2 in the same direction, so that the first heating body 111 and the second heating body 112 are both helical.

[0088] Alternatively, not shown, the first heating body 111 and the second heating body 112 may have opposite helical directions. The middle portion of the heating element 1 may be wound around the protrusion 24 at least 360° to form the first heating body 111 and the second heating body 112, and then the first heating body 111 may be wound clockwise around the periphery of the first tubular body 2 to form a helix, and the second heating body 112 may be wound counterclockwise around the periphery of the first tubular body 2 to form a helix.

[0089] As an example, you can refer to Figure 4 and Figure 5 The outer wall of the first tubular body 2 includes a ridge 25 protruding relative to the first portion 22 toward the second tubular body 3. The ridge 25 includes a plurality of second portions 23 and a plurality of third portions 26. At least a portion of the heating element 1 is wound around the ridge 25, and at least one third portion 26 is disposed between adjacent turns of the heating element 1, such that adjacent turns of the heating element 1 are spaced apart from each other. In embodiments where the heating element 1 includes a first heating body 111 and a second heating body 112, the coil of the first heating body 111 and the coil of the adjacent second heating body 112 can be spaced apart by the third portions 26.

[0090] Multiple second parts 23 on the same ridge 25 can be evenly distributed. Multiple third parts 26 on the same ridge 25 can be evenly distributed.

[0091] It can have multiple ridges 25, which are staggered along the circumference of the first tubular body 2. Adjacent ridges 25 can be separated by a first part 22, so that the heating element 1 located between the two ridges 25 can be suspended.

[0092] The axial spacing between any two adjacent coil turns can be the same, thus giving the spiral heating body 11 a consistent density, allowing it to be distributed relatively evenly around the periphery of the first tubular body 2. Of course, the axial spacing between at least one pair of adjacent coil turns can be smaller than that between another pair of adjacent coil turns, resulting in the spiral heating body 11 having a completely inconsistent or not completely consistent density.

[0093] In some embodiments, reference may be made to Figures 7-10 The second part 23' includes a plurality of first support portions 231 and a plurality of second support portions 232; the heating element 1' is alternately wound around the plurality of first support portions 231 and the plurality of second support portions 232 at least half a turn, such that at least a portion of the heating element 1' extends in a wave pattern around the periphery of the first tubular body 2', and the first support portions 231 abut against the heating element 1' along a first direction, and the second support portions 232 abut against the heating element 1' along a second direction. Preferably, the first direction is opposite to the second direction.

[0094] As an example, not shown, at least a portion of the waveform structure on the heating element 1′ extends axially on the outside of the first tubular body 2′.

[0095] Alternatives can be found by referring to Figure 8 and Figure 9 Multiple first support portions 231 are arranged in a first ring at intervals along the circumference of the first tubular body 2', and multiple second support portions 232 are arranged in a second ring at intervals along the circumference of the first tubular body 2'. The first and second rings are staggered in the axial direction, and the first and second directions are parallel to the axial direction. This causes at least a portion of the waveform structure on the heating element 1' to extend circumferentially on the outer side of the first tubular body 2'.

[0096] Further, you can refer to Figure 8 and Figure 9 The first support portion 231 has a first groove 2311 formed in a first direction, and a portion of the heating element 1' can be fitted into the first groove 2311 and thus abutted by the first support portion 231 along the first direction. The second support portion 232 may have a second groove 2321 formed in a second direction, and a portion of the heating element 1' can be fitted into the second groove 2321 and thus abutted by the second support portion 232 along the second direction.

[0097] As an example, you can refer to Figure 8 and Figure 10 At least some of the ripples on the heating element 1' resemble a square wave. In other embodiments, at least some of the ripples on the heating element 1' resemble a triangular wave, a trapezoidal wave, or other waveform shapes.

[0098] As an example, any two adjacent first support portions 231 have equal circumferential spacing. As an example, any two adjacent second support portions 232 have equal circumferential spacing. As an example, the circumferential spacing between two adjacent first support portions 231 is equal to the circumferential spacing between two adjacent second support portions 232. As an example, the circumferential width W of a first support portion 231 is equal to the circumferential spacing D between two adjacent first support portions 231. As an example, the circumferential width of a second support portion 232 is equal to the circumferential spacing between two adjacent second support portions 232.

[0099] As an example, you can refer to Figure 8 and Figure 9 The orthographic projections of multiple first support portions 231 in the axial direction and the orthographic projections of multiple second support portions 232 in the axial direction are staggered.

[0100] In some embodiments, reference may be made to Figure 1 , Figure 2 and Figure 7 The heating element 1 / 1′ is at least partially located in the airflow channel 4 or defines a portion of the boundary of the airflow channel 4. Thus, when air flows in the airflow channel 4, the air can contact the surface of the heating element 1 / 1′, which helps to improve the efficiency of the heating element 1 / 1′ in heating the air.

[0101] In some embodiments, the first tubular body 2 / 2′ includes an annular sidewall 27 surrounding the receiving cavity 21 and a base 28 for supporting the end of the aerosol generating article 100. The annular sidewall 27 and / or the base 28 are provided with air holes 29 for communicating the airflow channel 4 and the receiving cavity 21.

[0102] The outer wall of the annular sidewall 27 may include the first portion 22 / 22′ and the second portion 23 / 23′ as described in any of the above embodiments.

[0103] In such Figure 5 and Figure 9 In the illustrated embodiment, the annular sidewall 27 is provided with the aforementioned air holes 29. At least one air hole 29 may be provided between two adjacent ridges 25 or between two adjacent second support portions 232. The air holes 29 provided on the annular sidewall 27 can prevent residues falling from the aerosol generating article 100 from entering, thereby preventing blockage by residues falling from the aerosol generating article 100.

[0104] In some embodiments, the first tubular body 2 / 2′ further has a first collection space 20 communicating with the receiving cavity 21. A base 28 defines the bottom boundary of the first collection space 20, and a plurality of support platforms 2a are provided on the base 28 for supporting the end of the aerosol generating article 100. The plurality of support platforms 2a are located inside the annular sidewall 27 and are arranged around the first collection space 20. When at least a portion of the aerosol generating article 100 is contained in the receiving cavity 21, the support platforms 2a support the bottom of the aerosol generating article 100, such that the bottom of the aerosol generating article 100 is spaced apart from the base 28. The first collection space 20 is located between the bottom of the aerosol generating article 100 and the base 28, so that the first collection space 20 can collect residues falling from the aerosol generating article 100, and the first collection space 20 can also collect liquids that permeate from the aerosol generating article 100.

[0105] In some embodiments, reference may be made to Figure 2 and Figure 7 The heating assembly 200 also includes a lower end cover 5 connected to the second tubular body 3. The lower end cover 5 is located on the side of the base 28 away from the receiving cavity 21, and there is a second collection space 6 between the lower end cover 5 and the base 28, so that the base 28 is located between the second collection space 6 and the receiving cavity 21.

[0106] The second collection space 6 is located on the side of the vent 29 opposite to the airflow channel 4, and the second collection space 6 connects the vent 29 and the airflow channel 4. Thus, at least a portion of the recirculated aerosol can flow into the second collection space 6 through the vent 29, where it condenses to form condensate. A portion of the recirculated aerosol can also flow into the airflow channel 4 through the vent 29, and condense to form condensate as it flows along the airflow channel 4. The condensate can then flow into the second collection space 6 under its own gravity.

[0107] Preferably, the vent 29 formed on the annular sidewall 27 is disposed adjacent to the base 28. The vent 29 formed on the annular sidewall 27 can connect to the first collection space 20 through the gap between two adjacent support platforms 2a. Thus, the liquid in the first collection space 20 can flow to the second collection space 6 through the vent 29.

[0108] The base 28 is connected to the annular sidewall 27, preferably integrally formed. Through heat conduction, the base 28 can absorb some of the heat from the annular sidewall 27, thus raising its temperature. Furthermore, the hot air heated by the heating element 1 / 1′ in the airflow channel 4 flows into the first collection space 20 through the air hole 29, and then into the receiving cavity 21 or the aerosol generating article 100. When the hot air flows into the first collection space 20, the base 28 absorbs some of the heat from the hot air, thus raising its temperature. Therefore, the base 28 can have a higher temperature, preventing the backflowing aerosol from condensing on the base 28 to form condensate. The base 28 can also vaporize any liquid dripping onto it, preventing residue falling from the aerosol generating article 100 from being adhered to the base 28 by the viscous liquid. This allows the residue falling from the aerosol generating article 100 to remain relatively dry in the first collection space 20, and makes the base 28 easier to clean.

[0109] In some embodiments, the first tubular body 2 / 2′ is made of ceramic, which on the one hand prevents electrical conduction between the heating element 1 / 1′ and the first tubular body 2 / 2′, and on the other hand makes the first tubular body 2 / 2′ have a large heat capacity and thermal resistance, which is beneficial for heat preservation of the receiving cavity 21 and for reducing power consumption.

[0110] In some embodiments, reference may be made to Figure 2 , Figure 3 and Figure 7 The heating assembly 200 also includes a support member 7, which is disposed between the lower end cover 5 and the base 28, and is used to abut against the lower end cover 5 and the base 28 in opposite directions, thereby forming a ventilation gap 8 between the first tubular body 2 / 2′ and the lower end cover 5. The airflow channel 4 connects to the second collection space 6 through this ventilation gap 8. Figure 2 In the illustrated embodiment, there is no direct contact between the first tubular body 2 and the lower end cap 5. Preferably, the support member 7 is made of metal.

[0111] In some embodiments, the support member 7 includes an annular portion 71, which can be a closed annulus or an open annulus. The support member 7 also includes a plurality of sheet-like support portions 72, which extend from the annular portion toward the base 28 to support the base 28. Airflow flows into the inner space of the support member 7 through the gap between two adjacent sheet-like support portions 72.

[0112] The base 28 may have an insert groove 281, and the end of the sheet-like support 75 may be inserted into the corresponding insert groove 281. Of course, the end of the sheet-like support 72 may also directly abut against the lower surface of the base 28.

[0113] In some embodiments, reference may be made to Figure 3The lower end cover 5 has a wire-passing hole 51. The pin of the heating element 1 / 1' can pass through the vent gap 281 into the second collection space 6, and then through the wire-passing hole 51 to be electrically connected to the circuit board 320 or the power source 300. The size of the wire-passing hole 51 is suitable for the diameter of the pin or wire, so as to prevent airflow and liquid from leaking out of the second collection space 6 through the wire-passing hole 51.

[0114] In some embodiments, reference may be made to Figure 2 and Figure 3 The heating assembly 200 also includes a sealing ring 9, which surrounds the lower end cover 5 to provide a seal between the lower end cover 5 and the second tubular body 3, preventing airflow and liquid leakage from between the lower end cover 5 and the second tubular body 3.

[0115] In some embodiments, the first tubular body 2 / 2′ includes a proximal end and a distal end disposed opposite to each other. The proximal end of the first tubular body 2 / 2′ provides an inlet for the aerosol-generating article 100 to enter the receiving cavity 21, and the airflow channel 4 is used to guide air to flow from the proximal end of the first tubular body 2 / 2′ to the distal end of the first tubular body 2 / 2′. Figure 1 and Figure 2 In the diagram, the arrows indicate the direction of air flow in the heating component 200 or the aerosol generating device.

[0116] In some embodiments, reference may be made to Figure 2 and Figure 7 The heating assembly 200 also includes an upper end cap 10 connected to the second tubular body 3, the upper end cap 10 being disposed proximal to the first tubular body 2 / 2′. The upper end cap 10 has a guide hole 101 inside, the guide hole 101 being able to guide the aerosol generating article 100 into the receiving cavity 21.

[0117] As an example, when the aerosol generating article 100 is engaged with the heating assembly 200, a portion of the aerosol generating article 100 is located in the guide hole 101, and the aerosol generating article 100 is clearance-fitted with the upper end cover 10, so that outside air can flow into the heating assembly 200 along the inner wall of the upper end cover 10. Furthermore, a notch 102 is provided on the wall of the upper end cover 10, or a notch 102 is provided between the upper end cover 10 and the proximal end of the first tubular body 2 / 2′, the notch 102 connecting the guide hole 101 and the airflow channel 4, so that outside air can flow into the notch 102 along the guide hole 101, and then into the airflow channel 4.

[0118] In some embodiments, reference may be made to Figure 2 and Figure 7 The second tubular body 3 includes a heat insulation tube or a vacuum tube.

[0119] The insulation pipe includes insulation material. Insulation material refers to a material whose thermal conductivity is less than 100 W / (m·K) at 23°C and 50% relative humidity, preferably less than 40 W / (m·K) or less than 10 W / (m·K). For example, the insulation material may be made of at least one of PAEK-based materials, PI materials, or PBI materials, wherein PAEK-based materials include PEEK, PEKK, PEKEKK, or PEK materials. Insulation material may also include, but is not limited to, glass fiber, glass mat, ceramics, silica, alumina, carbon, and minerals, or any combination thereof.

[0120] The vacuum tube includes an outer tube 31, an inner tube 32, and a negative pressure layer 33 disposed between the outer tube 31 and the inner tube 32. The outer tube 31 and the inner tube 32 can be made of metal. The outer tube 31 and the inner tube 32 can be welded together in a vacuum environment to form the negative pressure layer 33 between them.

[0121] It should be noted that the preferred embodiments of this application are given in the specification and accompanying drawings, but are not limited to the embodiments described in this specification. Furthermore, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A heating assembly, characterized by, include: The first tubular body has an internal cavity for accommodating at least a portion of the aerosol-generated article; The second tubular body is arranged around the periphery of the first tubular body, and there is an airflow channel between the first tubular body and the second tubular body to guide the outside airflow to the receiving cavity; and A heating element is at least partially disposed between the first tubular body and the second tubular body to heat the air in the airflow channel, and there is a gap between the heating element and both the first tubular body and the second tubular body.

2. The heating assembly of claim 1, wherein, The heating element includes a heating body, a first pin, and a second pin. The first pin and the second pin are electrically connected to opposite ends of the heating body, and the first pin and the second pin are located on the same side of the heating body.

3. The heating assembly of claim 1, wherein, The outer wall of the first tubular body includes a first portion and a second portion that protrudes toward the second tubular body relative to the first portion. The heating element has a gap with the first portion and contacts the second portion to transfer heat to the inner wall of the first tubular body through the second portion.

4. The heating assembly of claim 3, wherein, The heating element is spirally wrapped around the periphery of the first tubular body, and the second part abuts the heating element in the radial direction.

5. The heating assembly of claim 4, wherein, A protrusion is provided on the outer wall of the first tubular body, and the heating element is wound around the protrusion at least half a turn, such that the heating element forms a first heating body that extends spirally from the protrusion around the first tubular body and a second heating body that extends spirally from the protrusion around the first tubular body.

6. The heating assembly of claim 5, wherein, The first heating element and the second heating element are arranged in parallel, so that the first heating element and the second heating element have the same helical direction; or The first heating element and the second heating element have opposite helical directions.

7. The heating assembly of claim 4, wherein, The outer wall of the first tubular body includes a ridge protruding toward the second tubular body relative to the first portion. The ridge includes a plurality of second portions and a plurality of third portions. At least a portion of the heating element is wound around the ridge, and at least one of the third portions is disposed between two adjacent turns of the heating element.

8. The heating assembly of claim 7, wherein, The two ends of the ridge are staggered in the axial direction; The tube has a plurality of said ridges, and the plurality of said ridges are arranged in a staggered manner along the circumference of the first tubular body, with two adjacent said ridges separated by a first portion.

9. The heating assembly of claim 3, wherein, The second part includes a plurality of first support parts and a plurality of second support parts; The heating element is alternately wound around a plurality of first support portions and a plurality of second support portions at least half a turn, such that at least a portion of the heating element extends in a wave pattern around the periphery of the first tubular body, and the first support portions abut against the heating element along a first direction, the second support portions abut against the heating element along a second direction, the first direction being opposite to the second direction.

10. The heating assembly of claim 9, wherein, Multiple first support portions are arranged in a first ring around the circumference of the first tubular body at intervals, and multiple second support portions are arranged in a second ring around the circumference of the first tubular body at intervals. The first ring and the second ring are staggered in the axial direction, and the first direction and the second direction are parallel to the axial direction.

11. The heating assembly of claim 9, wherein, Any two adjacent first support portions have an equal circumferential spacing; and / or Any two adjacent second support portions have an equal circumferential spacing; and / or The circumferential distance between two adjacent first support parts is equal to the circumferential distance between two adjacent second support parts; and / or The circumferential width of the first support portion is equal to the circumferential spacing between two adjacent first support portions; and / or The circumferential width of the second support portion is equal to the circumferential spacing between two adjacent second support portions; and / or The orthographic projections of the plurality of first support portions in the axial direction and the orthographic projections of the plurality of second support portions in the axial direction are arranged alternately; and / or At least some of the ripples on the heating element resemble square or triangular waves.

12. The heating assembly of claim 3, wherein, The radial distance between the heating element and the first part is less than the radial distance between the heating element and the second tubular body.

13. The heating assembly of claim 1, wherein, The first tubular body includes an annular sidewall surrounding the receiving cavity and a base for supporting the end of the aerosol-generating article. The annular sidewall and / or the base are provided with air holes for communicating the airflow channel and the receiving cavity.

14. The heating assembly of claim 13, wherein, The first tubular body further has a first collection space communicating with the receiving cavity. The base defines the bottom boundary of the first collection space, and the base is provided with a plurality of support platforms for supporting the end of the aerosol-generating product. The plurality of support platforms are arranged around the first collection space; and / or The heating assembly further includes a lower end cap connected to the second tubular body, and a second collection space is provided between the lower end cap and the base. The second collection space is located on the side of the air hole away from the airflow channel, and the second collection space connects the air hole and the airflow channel. and / or The air hole formed on the annular sidewall is located adjacent to the base.

15. The heating assembly according to claim 1, characterized in that, The second tubular body includes a heat-insulating tube or a vacuum tube.

16. The heating assembly of claim 1, wherein, The first tubular body includes a proximal end and a distal end disposed opposite to each other. The proximal end of the first tubular body provides an inlet for the aerosol-generating article to enter the receiving cavity. The airflow channel is used to guide air to flow from the proximal end of the first tubular body to the distal end of the first tubular body.

17. The heating assembly of any one of claims 1-16, wherein, The heating element is located at least partially within the airflow channel or the heating element defines a portion of the boundary of the airflow channel.

18. An aerosol-generating device comprising: It includes a power source and a heating assembly as described in any one of claims 1-17, wherein the power source is used to provide energy for heating the heating element.

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