Heating assembly and aerosol generating device

Abstract

Embodiments of the present application provide a heating assembly and an aerosol generating device. The heating assembly comprises: a housing, which is at least partially capable of transmitting infrared rays; and a heating element used for heating an aerosol generating product, the heating element being at least partially arranged inside the housing and extending in the length direction of the housing, the heating element comprising a heating body and an infrared radiation layer arranged on the heating body, and the infrared radiation layer being capable of absorbing heat generated by the heating body and radiating the infrared rays, wherein part of the heating element is in contact with the inner wall surface of the housing, and at least part of the outer side surface of the heating element arranged relative to the inner wall surface of the housing is spaced apart from the inner wall surface of the housing.

Description

Heating assembly and aerosol generating device

[0001] Cross-references to related documents

[0002] This application claims priority to the prior application with application number 202420349563.0 filed with the State Intellectual Property Office of China on February 23, 2024, entitled “Heating component and aerosol generating device”. The contents of the above-mentioned prior application are incorporated into this text by introduction. Technical Field

[0003] The embodiments of the present application relate to the technical field of heat-without-combustion aerosol generation, and in particular to a heating component and an aerosol generating device. Background Art

[0004] Smoking articles (eg, cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. Attempts have been made to replace these tobacco-burning articles by creating products that release compounds without combustion.

[0005] Examples of such products are heating devices, which release compounds by heating rather than burning a material. For example, the material may be an aerosol-generating article containing tobacco or other non-tobacco products, which may or may not contain nicotine.

[0006] A known heating device comprises a receiving cavity and a heating assembly, wherein a portion of the heating assembly extends within the receiving cavity and is insertable into the interior of the aerosol-generating article when the aerosol-generating article is received in the receiving cavity. However, the current heating assembly consumes a large amount of power.

[0007] Application Contents

[0008] The present application provides a heating component and an aerosol generating device, which can reduce the power consumption of the heating component.

[0009] One embodiment of the present application provides a heating assembly, comprising:

[0010] a housing that is at least partially infrared-transmissive; and

[0011] a heating element for heating the aerosol-generating article, wherein at least a portion of the heating element is disposed within the housing and extends along the length of the housing, the heating element comprising a heating element and an infrared radiation layer disposed on the heating element, the infrared radiation layer being capable of absorbing heat generated by the heating element and radiating infrared rays;

[0012] Part of the heating element is in contact with the inner wall surface of the shell, and at least part of the outer side surface of the heating element arranged relative to the inner wall surface of the shell is spaced apart from the inner wall surface of the shell.

[0013] As an example, the heating element includes a susceptor capable of generating heat in a changing magnetic field.

[0014] As an example, at least a portion of the surface of the susceptor where the infrared radiation layer is arranged is spaced apart from an inner wall surface of the housing.

[0015] As an example, the heating element is substantially tubular, and the outer diameter of at least a portion of the heating element in the length direction is reduced relative to the outer diameter of other portions.

[0016] As an example, the wall of the heating element has one or more through holes.

[0017] As an example, the heating element includes a first end portion, a second end portion, and a main body portion located between the first end portion and the second end portion;

[0018] The first end portion and / or the second end portion has one or more notches.

[0019] As an example, the heating element includes a first end, a second end, and a main body located between the first end and the second end;

[0020] The cross-sectional area of ​​the first end portion is larger than the cross-sectional area of ​​the main body portion, and at least a portion of the first end portion contacts the inner wall surface of the shell; and / or

[0021] The cross-sectional area of ​​the second end portion is larger than the cross-sectional area of ​​the main body portion, and at least a portion of the second end portion contacts the inner wall surface of the shell.

[0022] As an example, the outer side surface of the main body is spaced apart from the inner wall surface of the shell.

[0023] As an example, the contact between the heating element and the inner wall surface of the shell includes at least one of point contact, line contact and surface contact.

[0024] As an example, the heating assembly further includes a support portion, which supports the heating element so that at least a portion of the heating element is maintained inside the housing.

[0025] As an example, the support portion has a support end for supporting the heating element;

[0026] The support end only partially contacts the heating element; or

[0027] The contact between the supporting end and the heating element includes at least one of point contact, line contact and surface contact.

[0028] As an example, the support portion is a hollow tubular structure or a porous body.

[0029] As an example, the heating assembly further includes a sealing portion, one end of the shell is a closed conical structure, and the other end opposite thereto is sealed by the sealing portion.

[0030] As an example, part of the outer wall surface of the shell is concave to reduce the contact area between the shell and the aerosol generating article.

[0031] One embodiment of the present application provides a heating component, including the heating component described above, and also including a accommodating cavity and a power supply component, wherein at least a portion of the heating component is arranged in the accommodating cavity, the accommodating cavity is used to accommodate at least a portion of the aerosol-generating article, and the power supply component is used to provide power for the heating component to heat the aerosol-generating article.

[0032] One embodiment of the present application provides an aerosol generating device, comprising the heating component as described above, and also comprising a accommodating cavity and a power supply component, wherein at least a portion of the heating component is arranged in the accommodating cavity, the accommodating cavity is used to accommodate at least a portion of the aerosol generating product, and the power supply component is used to provide power for the heating component to heat the aerosol generating product.

[0033] The above-mentioned heating component and aerosol generating device include a shell that is at least partially capable of transmitting infrared rays and a heating element that is at least partially arranged inside the shell and extends along the length direction of the shell. The heating element includes a heating body and an infrared radiation layer arranged on the heating body. The infrared radiation layer can absorb the heat generated by the heating body and radiate infrared rays. The heating element is partially in contact with the inner wall surface of the shell, and at least part of the outer side surface of the heating element arranged relative to the inner wall surface of the shell is spaced apart from the inner wall surface of the shell, so that the heating element can be kept in the shell and the contact area between the heating element and the shell can be reduced, which helps to prevent the heat generated by the heating element from being absorbed by the shell in large quantities and wasted, thereby reducing the energy consumption of the heating component. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0035] FIG1 is a schematic diagram of an aerosol generating device provided in one embodiment;

[0036] FIG2 is a schematic diagram of a heating assembly provided by an embodiment;

[0037] FIG3 is a schematic diagram of a housing of a heating assembly provided in one embodiment;

[0038] FIG4 is a cross-sectional view of a heating assembly provided in one embodiment;

[0039] FIG5 is a cross-sectional view of a heating assembly provided in yet another embodiment;

[0040] FIG6 is a cross-sectional view of a heating assembly provided in another embodiment;

[0041] FIG7 is a schematic diagram of the cooperation between the housing and the heating element provided in one embodiment;

[0042] FIG8 is a schematic diagram of the cooperation between the housing and the heating element provided by another embodiment;

[0043] FIG9 is a schematic diagram of the cooperation between the housing and the heating element provided in one embodiment;

[0044] FIG10 is a schematic diagram of the cooperation between the housing and the heating element provided in one embodiment;

[0045] FIG11 is a schematic diagram of the cooperation between the housing and the heating element provided in one embodiment;

[0046] FIG12 is a schematic diagram of the cooperation between the housing and the heating element provided in one embodiment;

[0047] FIG13 is a schematic diagram of the cooperation between the housing and the heating element provided in one embodiment;

[0048] In the figure: 1. Aerosol-generating product; 11. Aerosol-forming matrix; 2. Power supply assembly; 21. Power supply; 22. Circuit board; 3. Heating assembly; 31. Shell; 311. Recess; 32. Heating element; 321. Heating element; 322. Infrared radiation layer; 323. First end; 324. Main body; 325. Second end; 326. Notch; 327. Elastic arm; 328. Through hole; 33. Support portion; 331. Support end; 34. Sealing portion; 4. Magnetic field generator. DETAILED DESCRIPTION

[0049] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiment is only a regional embodiment of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0050] The terms "first", "second" and "third" in this application are only used for descriptive purposes and cannot be understood as indicating or suggesting relative importance or implicitly indicating the quantity or order of the indicated technical features. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship or movement situation between the various components under a certain posture (as shown in the accompanying drawings). If the posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or equipment comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or equipment.

[0051] References to "embodiments" herein mean that the features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be one or more intermediate elements in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0053] With reference to FIG. 1 , one embodiment of the present application provides an aerosol-generating device. The aerosol-generating device is a device that engages or interacts with an aerosol-generating article 1 to generate an inhalable aerosol. The aerosol-generating device includes a receiving cavity. When the aerosol-generating article 1 is engaged with the aerosol-generating device, at least a portion of the aerosol-generating article 1 is received within the receiving cavity.

[0054] As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming substrate 11 that, when heated, releases volatile aerosol-forming compounds to form an aerosol. In one embodiment, the aerosol-generating article 1 is removably coupled to an aerosol-generating device. The aerosol-generating article 1 may be disposable or reusable.

[0055] The aerosol-forming substrate 11 may comprise a solid aerosol-forming substrate. The solid aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds that are released from the aerosol-forming substrate upon heating. The solid aerosol-forming substrate may comprise a non-tobacco material. The solid aerosol-forming substrate may comprise a tobacco-containing material as well as a non-tobacco material.

[0056] Aerosol forming matrix 11 can comprise liquid aerosol forming matrix. Liquid aerosol forming matrix can comprise liquid containing tobacco material containing volatile tobacco flavor components, can also be the liquid comprising non-tobacco material. Liquid aerosol forming matrix can comprise water, solvent, ethanol, plant extract, spices, flavoring agent or vitamin mixture etc., spices can comprise betel nut extract, menthol, peppermint, spearmint oil, various fruity fragrance components etc., but is not limited to this. Flavoring agent can comprise the component that can provide various fragrance or local flavor to the user. Vitamin mixture can be the mixture that is mixed with at least one of vitamin A, vitamin B, vitamin C and vitamin E, but is not limited to this.

[0057] The aerosol generating device may be an electrically operated device comprising a power supply component 2 and a heating component 3 .

[0058] The power supply assembly 2 includes a power supply 21 and a circuit board 22. The power supply 21 can include any suitable battery or battery cell. The circuit board 22 has one or more controllers. The one or more controllers can control the power output of the power supply 21, such as controlling the sensory prompter in the aerosol generating device to generate sensory signals such as sound, light or vibration, or controlling other operations of the aerosol generating device.

[0059] Based on the power output by the power supply assembly 2, the heating assembly 3 releases heat to heat the aerosol-forming substrate 11, causing the aerosol-forming substrate 11 to generate aerosol. The circuit board 22 controls the power output by the power supply 21, thereby controlling the temperature and heating rate of the aerosol-forming substrate 11 by the heating assembly 3.

[0060] The heating assembly 3 may comprise an external heating assembly, which is located outside the aerosol-generating article 1 when the aerosol-generating article 1 is combined with the aerosol-generating device to heat the aerosol-forming substrate 11 from the outside. The heating assembly 3 may comprise an internal heating assembly, which is located at least partially inside the aerosol-generating article when the aerosol-generating article 1 is combined with the aerosol-generating device to heat the aerosol-forming substrate 11 from the inside. In the embodiment shown in Figures 1 and 2, the heating assembly 3 is an internal heating assembly.

[0061] The heating assembly 3 includes a housing 31 and a heating element 32 .

[0062] The heating element 32 includes a heating element 321 and an infrared radiation layer 322. The heating element 321 converts electrical energy or magnetic field energy into thermal energy, thereby releasing heat. The infrared radiation layer 322 is disposed on the heating element 321 to absorb at least part of the heat released by the heating element 321. The infrared radiation layer 322 is then excited by the high temperature generated by the heating element 321 and radiates infrared rays.

[0063] At least a portion of the housing 31 is capable of transmitting infrared radiation. Therefore, at least a portion of the housing 31 is transparent or translucent. As an example, at least a portion of the housing 31 is made of transparent ceramic or quartz glass. Thus, the infrared radiation generated by the heating element 32 can be transmitted through at least a portion of the housing 31.

[0064] The shell 31 has an inner wall surface and an outer wall surface arranged opposite to each other, wherein the outer wall surface is arranged toward the aerosol generating product 1 , and the infrared rays generated by the heating element 32 are emitted into the wall of the shell 31 from the inner wall surface and emitted out of the shell 31 from the outer wall surface.

[0065] The heating assembly 3 primarily heats the aerosol-forming substrate 11 using infrared radiation. When the wavelength of the infrared radiation matches the absorption wavelength of the aerosol-forming substrate 11, the infrared radiation energy is readily absorbed by the aerosol-forming substrate 11, causing the temperature of the aerosol-forming substrate 11 to increase. In the embodiments of the present application, the wavelength of the infrared radiation is not limited and can be infrared radiation in the range of 0.75 μm to 1000 μm, or alternatively, far-infrared radiation in the range of 1.5 μm to 400 μm.

[0066] The infrared radiation layer 322 can be made of tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride and anhydrous copper sulfate mixed in a certain proportion and then coated on the outer surface of the heating element 321; or the infrared radiation layer 322 is a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium-titanium oxide ceramic layer, a zirconium-titanium nitride ceramic layer, a zirconium-titanium boride ceramic layer, a zirconium-titanium carbide ceramic layer, an iron oxide ceramic layer, an iron nitride ceramic layer, an iron boride ceramic layer, an iron carbide ceramic layer, a rare earth oxide ceramic layer, a rare earth nitride ceramic layer, a rare earth boride ceramic layer, a rare earth carbide ceramic layer, a nickel-cobalt oxide ceramic layer, a nickel-cobalt nitride ceramic layer, a nickel-cobalt boride ceramic layer, a nickel-cobalt carbide ceramic layer or a high-silicon molecular sieve ceramic layer; the infrared radiation layer can also be a coating of other existing materials.

[0067] When the heating element 321 includes a susceptor and the infrared radiation layer 322 is disposed on the outer surface of the susceptor, the heating element 32 also includes an anti-oxidation layer to prevent oxidation of the susceptor. The infrared radiation coating 322 and the anti-oxidation layer can be combined into one, so that the infrared radiation layer 322 can both radiate infrared rays and prevent oxidation of the susceptor. Such infrared radiation coatings 322 include, but are not limited to, one or more inorganic materials such as SiC, Al2O3, SiO2, Ni2O3, boron nitride, barium oxide, and zinc oxide.

[0068] The infrared radiation layer 322 can be disposed on the outer surface of the heating element 321 by using processes such as dip coating, spray coating, PVD, CVD, and vacuum evaporation.

[0069] The infrared radiation layer 322 may emit infrared rays of one wavelength or multiple wavelengths. The proportion of infrared rays of different wavelengths may be adjusted by adjusting the temperature of the heating element 321 .

[0070] In existing heating assemblies, the heating assembly primarily heats the aerosol-forming substrate by transferring heat through the housing. Specifically, the housing absorbs heat from the heating element and uses a portion of the absorbed heat to raise its own temperature, and transfers a portion of the absorbed heat to the aerosol-forming substrate in contact with it, thereby heating the aerosol-forming substrate. In order to increase the heating efficiency of the aerosol-forming substrate, it is necessary to increase the rate at which the housing absorbs heat. To this end, it is necessary to ensure that the housing and the heating element have as large a contact area as possible. However, a considerable portion of the heat absorbed by the housing does not contribute to heating the aerosol-forming substrate, resulting in wasted heat and increased energy consumption of the heating assembly. Furthermore, since the housing takes a long time to heat up, it takes a long time for the aerosol-forming substrate to rise from an initial temperature to a preset temperature, or a long time for the aerosol-forming substrate to return to the preset temperature. Furthermore, when the aerosol-forming substrate is heated by heat conduction through the housing, the temperature of the heating assembly housing itself often exceeds that of the aerosol-forming substrate, resulting in residues of the aerosol-forming substrate easily adhering to the outer surface of the housing after the heating assembly cools.

[0071] In the embodiments of the present application, the outer side surface of the heating element 32 that is disposed opposite the inner wall surface of the housing 31 does not contact the inner wall surface of the housing 31, or the heating element 32 only partially contacts the inner wall surface of the housing 31, and at least a portion of the outer side surface of the heating element 32 that is disposed opposite the inner wall surface of the housing 31 is spaced apart from the inner wall surface of the housing 31. This effectively reduces the amount of heat transferred from the heating element 32 to the housing 31 by heat conduction. The infrared rays generated by the heating element 32 pass through at least a portion of the housing 31 and enter the aerosol-forming substrate 11, thereby increasing the temperature of the aerosol-forming substrate 11. Therefore, the aerosol-forming substrate 11 is heated primarily by the infrared rays, without requiring the housing 31 to reach a high temperature to heat the aerosol-forming substrate 11. This reduces the consumption of heat generated by the heating element 3 by the housing 31, increases the rate of temperature increase of the aerosol-forming substrate 11, and prevents the aerosol-forming substrate 11 from adhering to the outer wall surface of the housing 31.

[0072] Since the heating assembly 3 mainly heats the aerosol-forming substrate 11 by infrared rays, the outer wall surface of the shell 31 may not contact the aerosol-generating article 1 . Of course, the outer wall surface of the shell 31 may also contact the aerosol-generating article 1 .

[0073] In one embodiment, the shell 31 is the shell 31 of the internal heating component 3, and the local depression 311 on the outer wall of the shell 31, when the aerosol generating product 1 is engaged in the aerosol generating device, at least part of the area of ​​the depression 311 on the shell 31 can not contact the aerosol generating product 1, thereby reducing the contact area between the outer wall of the shell 31 and the aerosol generating product 1, which is beneficial to prevent the residue in the aerosol generating product 1 from sticking to the surface of the heating component 3, and is also beneficial to reducing the heat exchange efficiency between the shell 31 and the aerosol generating product 1, preventing the shell 31 from absorbing heat from the aerosol generating product 1, and reducing power consumption.

[0074] In the embodiment shown in FIG3 , the recessed area on the outer wall of the housing 31 forms one or more annular grooves. The depth of the grooves can be less than or equal to 0.3 mm, preferably less than or equal to 0.2 mm. The width of the grooves can be less than or equal to 2 mm, preferably less than or equal to 1 mm. The spacing between adjacent grooves can be less than or equal to 2 mm, preferably less than or equal to 1 mm. This reduces the difficulty of inserting and removing the aerosol-generating article 1 into and from the receiving cavity.

[0075] It should be noted that it is optional but not mandatory for the recessed area on the outer wall of the shell 31 to form one or more annular grooves. For example, the recessed area on the outer wall of the shell 31 can form a spiral or thread shape.

[0076] Of course, the outer wall surface of the housing 31 may be smooth without the recess 311 .

[0077] 4 to 11 , the contact between the heating element 32 and the inner wall of the housing 31 includes at least one of point contact, line contact, and surface contact. This contact helps stably maintain at least a portion of the heating element 32 within the housing 31 and prevents the heating element 32 from shaking within the housing 31. Furthermore, the contact between the heating element 32 and the inner wall of the housing 31 helps appropriately raise the temperature of the housing 31, preventing the housing 31 from absorbing heat from the aerosol-forming substrate 11 due to excessively low temperature, which would be detrimental to heating the aerosol-forming substrate 11.

[0078] In an example similar to that shown in FIG11 , the heating element 32 may contact the inner wall surface of the housing 31 at a single point or multiple points. In examples similar to those shown in FIG5-10 , the heating element 32 may contact the inner wall surface of the housing 31 at one or more points. In an example similar to that shown in FIG4 , the heating element 32 may contact the inner wall surface of the housing 31 at one or more points. The contact between the heating element 32 and the inner wall surface of the housing 31 may include at least one or at least two of point contact, line contact, and surface contact.

[0079] Based on the contact method between the heating element 32 and the inner wall surface of the shell 31, the outer surface of the heating element 32 may have depressions (such as grooves, etc.) or protrusions (such as bumps, etc.), or the cross-sectional area of ​​the heating element 32 may not be uniform but rather vary, wherein the cross-sectional area of ​​the heating element 32 may be the area within the boundary defined by the outer surface of the heating element 32. For example, when the heating element 32 is substantially tubular or cylindrical, the uneven cross-sectional area of ​​the heating element 32 is manifested in an uneven outer diameter of the heating element 32 along the length of the heating element 32. Along the length of the heating element 32, the outer diameter of at least some sections of the heating element 32 is reduced relative to other sections, resulting in the heating element 32 being thicker in some areas and thinner in others. For another example, when the heating element 32 is substantially sheet-like, the uneven cross-sectional area of ​​the heating element 32 is manifested in an uneven width of the heating element 32.

[0080] Alternatively, based on the contact pattern between the heating element 32 and the inner wall of the housing 31, the inner wall of the housing 31 may have a concave or convex surface, or the area within the inner wall of the housing 31 may be non-uniform but rather variable. For example, if the inner wall of the housing 31 is substantially circular in cross-section, the non-uniform area within the inner wall of the housing 31 may be manifested as a non-uniform inner diameter of the housing 31 along its length.

[0081] Based on the fact that the cross-sectional area of ​​the heating element 32 is not uniform but varies, in one embodiment, referring to Figures 7 to 11, the heating element 32 includes a first end 323, a second end 325, and a main body 324 located between the first end 323 and the second end 325. There may be no obvious dividing line between the first end 323 and the main body 324 and / or between the second end 325 and the main body 324, or there may be a clear dividing line.

[0082] In one embodiment, referring to Figures 4-13, the cross-sectional area of ​​the first end portion 323 is greater than the cross-sectional area of ​​the main body portion 324, and at least a portion of the first end portion 323 contacts the inner wall surface of the housing 31. The contact between the first end portion 323 and the inner wall surface of the housing 31 can be at least one of point contact, line contact, and surface contact. In the embodiment shown in Figure 4, the contact between the first end portion 323 and the inner wall surface of the housing 31 is surface contact. In the embodiments shown in Figures 7-10 and 13, the contact between the first end portion 323 and the inner wall surface of the housing 31 is line contact. In the embodiment shown in Figure 11, the contact between the first end portion 323 and the inner wall surface of the housing 31 is point contact.

[0083] In one embodiment, referring to Figures 4 to 8, 11 and 13, the cross-sectional area of ​​the second end portion 325 is greater than the cross-sectional area of ​​the main body portion 324, and at least a portion of the second end portion 325 contacts the inner wall surface of the shell 31.

[0084] In one embodiment, referring to Figures 4 to 8, 11, and 13, the cross-sectional areas of the first end portion 323 and the second end portion 325 are both larger than the cross-sectional area of ​​the main body portion 324, and at least a portion of the first end portion 323 and at least a portion of the second end portion 325 both contact the inner wall surface of the housing 31. The first end portion 323 and the second end portion 325 can have the same shape or cross-sectional area, but are not limited thereto.

[0085] In one embodiment, referring to FIG. 7 to FIG. 11 , the outer side surface of the main body 324 is spaced apart from the inner wall surface of the housing 31 . The space may be a gas space or a vacuum space. 9 and 10 , the first end 323 or the second end 325 has the same radial dimension as the main body 324, so that the first end 323 or the second end 325 can be spaced from the inner wall of the shell 31, and the distance between the first end 323 or the second end 325 and the inner wall of the shell 31 is substantially equal to the distance between the main body 324 and the inner wall of the shell 31. Similarly, the distance between the first end 323 or the second end 325 and the inner wall of the shell 31 can be a gas distance or a vacuum distance; alternatively, the first end 323 or the second end 325 can be spaced from the inner wall of the shell 31, but the cross-sectional area of ​​the first end 323 or the second end 325 is different from the cross-sectional area of ​​the main body 324, so that the distance between the first end 323 or the second end 325 and the inner wall of the shell 31 is unequal to the distance between the main body 324 and the inner wall of the shell 31.

[0086] Since the heating element 321 can generate and release heat, in one embodiment, the heating element 321 includes a susceptor that can generate heat in a changing magnetic field.

[0087] As used herein, the term "susceptor" refers to a material that can convert electromagnetic energy into heat. When placed within a varying electromagnetic field, eddy currents and / or magnetic hysteresis induced in the susceptor cause the susceptor to generate heat. In such embodiments, the susceptor is designed to interface with an aerosol generating device including a magnetic field generator 4, or the susceptor is designed to interface with a heating assembly 3 including a magnetic field generator 4. The magnetic field generator 4 is capable of generating a varying magnetic field, and during use, at least a portion of the susceptor is within the range of the varying magnetic field generated by the magnetic field generator 4. The magnetic field generator 4 is electrically connected to a power supply assembly 2, which provides the current to the magnetic field generator 4 to generate the varying magnetic field. The magnetic field generator 4 may include one or more induction coils that generate the varying magnetic field. The one or more induction coils may surround the susceptor layer or be disposed outside the susceptor. In one embodiment, the magnetic field generator 4 is capable of generating a varying magnetic field between 1 and 30 MHz, for example, between 2 and 10 MHz, or for example, between 5 and 7 MHz. In an embodiment, the magnetic field generator 4 is capable of generating a varying magnetic field having a field strength (H field) between 1 and 5 kA / m, for example between 2 and 3 kA / m, for example about 2.5 kA / m.

[0088] The susceptor may comprise metal or carbon. In one embodiment, the susceptor may comprise a ferromagnetic material, such as at least one of ferrite, ferromagnetic steel, or stainless steel. In one embodiment, the susceptor comprises at least one of nickel-iron alloy or permalloy. In one embodiment, the susceptor comprises 400 series stainless steel, which includes 410, 420, or 430 grade stainless steel.

[0089] The susceptor may be completely disposed inside the housing 31. The infrared radiation layer 322 may be directly disposed on the outer surface of the susceptor.

[0090] In the embodiments shown in FIG. 7 , FIG. 9 , FIG. 12 and FIG. 13 , the susceptor is a hollow structure, and the wall thickness of the susceptor may be no less than 3 times of the skin depth.

[0091] In the embodiments shown in Figures 8, 10, and 11, the susceptor is a solid structure. In the examples of Figures 8 and 10, the susceptor is rod-shaped, and the diameter of the rod-shaped susceptor can be no less than four times the skin depth. In the example of Figure 11, the susceptor is sheet-shaped, and the thickness of the sheet-shaped susceptor can be no less than three times the skin depth.

[0092] When the heating element 321 includes a susceptor, as an example, the first end 323 and / or the second end 325 may have one or more notches 326. Because the notches 326 are free of susceptors and infrared radiation layer 322, thermal radiation from the first end 323 and / or the second end 325 is reduced, thereby lowering the heating temperature of the region of the aerosol-generating article 1 corresponding to the first end 323 and / or the second end 325. Furthermore, the presence of the notches 326 macroscopically blocks the formation of a current loop within the region, reducing induced heating within the region in a changing magnetic field and thereby controlling the temperature distribution of the heating element.

[0093] When the heating element 321 includes a susceptor, as an example, an infrared radiation layer 322 is arranged on at least a portion of the surface of the susceptor, and at least a portion of the surface of the susceptor where the infrared radiation layer 322 is arranged is spaced apart from the inner wall surface of the housing 31 .

[0094] In the embodiment shown in FIG12 , the second end 325 of the heating element 32 has a notch 326. Relative to the first end 323, the second end 325 is closer to the bottom of the aerosol-generating article 1, where the bottom of the aerosol-generating article 1 is positioned opposite the mouthpiece of the aerosol-generating article 1. In one example, at least a portion of the second end 325 is positioned corresponding to the bottom of the aerosol-forming substrate 11. The notch 326 in the second end 325 reduces the amount of radiation from the heating element 32 to the bottom of the aerosol-forming substrate 11, thereby preventing oil from seeping out of the bottom of the aerosol-forming substrate 11 and preventing oil that has seeped out of the aerosol-forming substrate 11 from leaking out of the aerosol-generating article 1. In one example, the aerosol generating product 1 further includes a plug arranged on the aerosol forming matrix 11, which can support the aerosol forming matrix 11 and prevent leakage of oil liquid penetrating from the aerosol forming matrix 11. The material of the plug can be the same as the material of the suction nozzle. The plug can include breathable and porous materials such as acetate fiber. At least a portion of the second end 325 corresponds to the plug setting. The notch 326 on the second end 325 reduces the heat generated by this part of the heating element 32, and the temperature is relatively low, which reduces the amount of radiation to the plug, thereby preventing the plug from being carbonized or melted due to excessive temperature.

[0095] In the embodiment shown in Figure 12, the heating element 32 is tubular and extends along the length direction of the shell 31. There are at least two notches 326 on the second end 325, so that the second end 325 includes at least two elastic arms 327. When the heating element 32 is assembled into the shell 31, the elastic arms 327 on the second end 325 elastically abut the inner wall surface of the shell 31, so that the heating element 32 can be more stably maintained in the shell 31.

[0096] In an example where the heating element 32 is in a sheet shape, the second end portion 325 of the heating element 32 may have two elastic arms 327 . The notch 326 is located between the two elastic arms 327 , and the two elastic arms 327 elastically abut against the housing 31 .

[0097] In one embodiment (not shown), the first end portion 323 of the heating element 32 has a notch 326. At least a portion of the first end portion 323 is positioned corresponding to the top of the aerosol-forming substrate 11. The notch 326 in the first end portion 323 reduces the amount of radiation from the heating element 32 to the top of the aerosol-forming substrate 11, thereby preventing the aerosol generated by the aerosol-forming substrate 11 from becoming excessively hot and burning the user's mouth when inhaled into the cavity. The notch 326 in the first end portion 323 allows the first end portion 323 to have a resilient arm 327, which can resiliently abut the housing 31.

[0098] When the heating element 321 includes a susceptor, as an example, referring to FIG. 13 , one or more through-holes 328 are provided on the heating element 32. The through-holes 328 can reduce the overall mass of the heating element and increase its electrical resistance, thereby increasing its heating rate in a changing magnetic field. Furthermore, since there are no susceptors or infrared radiation layer 322 at the through-holes, the area over which the heating element 32 generates infrared radiation is correspondingly reduced. Therefore, by setting the position, size, or distribution density of the through-holes 328, the infrared radiation per unit area of ​​at least two regions of the heating element 32 can be varied, thereby enabling at least two regions of the aerosol-generating article 1 to have different heating temperatures. This can prevent the aerosol-forming substrate 11 from penetrating oil, preventing leakage of oil permeating the aerosol-forming substrate 11, preventing the plug from overheating and carbonizing or melting, or preventing the aerosol from becoming too hot and burning the mouth when inhaled by the user.

[0099] Because the infrared radiation layer 322 heats the aerosol-forming substrate 11 by radiating infrared rays, in one embodiment, the infrared radiation layer 322 is disposed on at least a portion of the surface of the heating element 321 that faces the inner wall of the housing 31. That is, the infrared radiation layer 322 is disposed on at least a portion of the outer side surface of the heating element 321, with at least a portion of the outer side surface of the infrared radiation layer 322 spaced apart from the inner wall of the housing 31. For example, the infrared radiation layer 322 may be disposed only on the outer side surface of the heating element 321 in a region with a smaller cross-sectional area; for example, the infrared radiation layer 322 may be disposed only on the main body 324.

[0100] In other embodiments, the heating element 321 includes a resistive heating element that can generate Joule heat when energized. Suitable resistive heating elements 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 materials and metal 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 superalloys based on nickel, iron, and cobalt, stainless steel, iron-aluminum-based alloys, and iron-manganese-aluminum-based alloys.

[0101] In one embodiment, referring to FIG. 4 to FIG. 6 , the heating assembly 3 further includes a support portion 33 , which supports the heating element 32 so that at least a portion of the heating element 32 remains inside the housing 31 .

[0102] The support portion 33 may be made of an insulating material that is resistant to temperatures exceeding 400°C. The support portion 33 may be made of a heat-insulating material, which refers to a material having a thermal conductivity of 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). The support portion 33 may be made of an inorganic material. The support portion 33 may be made of a non-magnetic material that does not generate heat in a changing magnetic field. Suitable support portions 33 include, but are not limited to, zirconium oxide or zirconium oxide.

[0103] In the embodiment shown in FIG4 , the support portion 33 includes a support end 331 that supports the heating element 32. The support end 331 supports the heating element 32 in an abutting manner, and therefore the support end 331 needs to be in contact with the heating element 32. To reduce power consumption and prevent the support portion 33 from absorbing heat from the heating element 32, the contact between the support end 331 and the heating element 32 includes at least one of point contact, line contact, and surface contact, thereby reducing the contact area between the support portion 33 and the heating element 32.

[0104] In one embodiment, referring to FIG. 4 , the support end 331 only partially contacts the heating element 32 , and a gas gap or a vacuum gap may be formed between the remaining portion of the support end 331 and the heating element 32 .

[0105] In one embodiment, referring to FIG. 4 , the support portion 33 is a hollow tubular structure, and the hollow opening of the support portion 33 may be disposed corresponding to the end of the heating element 32 to prevent heat from the heating element 32 from being transferred outward through the cavity within the support portion 33. The cavity may be a vacuum or may contain a gas.

[0106] In other embodiments, the support portion 33 is a porous body.

[0107] By configuring the support portion 33 as a hollow tubular structure or a porous body, the thermal resistance of the support portion 33 can be increased and the thermal conductivity of the support portion 33 can be reduced, while also reducing the mass of the support portion 33. Based on the formula: Q = CMΔT, where Q is the amount of heat absorbed, C is the specific heat capacity, M is the mass, and ΔT is the temperature rise. It can be seen that, given the same temperature rise, the smaller the mass of the support portion 33, the less heat it absorbs, and thus the lower the energy consumption. Therefore, reducing the mass of the support portion 33 can reduce the power consumption of the heating assembly 3.

[0108] In one embodiment, as shown in Figures 4-6 , the heating assembly further includes a sealing portion 34. One end of the housing 31 is a closed conical structure, while the other end is sealed by the sealing portion 34. This creates a sealed space within the housing 31, reducing gas convection inside and outside the housing 31, which is beneficial for reducing power consumption of the heating assembly 3 or maintaining a vacuum within the housing 31. Alternatively, the interior of the housing 31 may be filled with an inert gas, such as argon.

[0109] In the embodiment shown in FIG4 , the sealing portion 34 abuts against the supporting portion 33 to retain the supporting portion 33 within the housing 31. The material selected for the supporting portion 33 can prevent the heat from the heating element 32 from being transferred to the sealing portion 34, thereby providing a wide range of materials for the sealing portion 34 and reducing sealing costs.

[0110] In one embodiment, the sealing portion 34 is made of glass, and the glass is melted to form a sealing connection with the housing 34 and seal the corresponding ends of the housing 31 .

[0111] In one embodiment, referring to Figures 5 and 6 , the support portion 33 includes a metal connector, one end of which is welded to the heating element 32, and the other end is fixed to the glass sealing portion 34. The glass can be melted to form a hermetic connection between the glass and the metal connector. Supporting the heating element 32 with the metal connector not only separates the heating element 32 from the sealing portion 34, but also prevents heat from the heating element 32 from being transferred toward the sealing portion 34. Using a metal connector to support the heating element 32 can further reduce the amount of heat absorbed by the support portion 33 from the heating element 32.

[0112] As an example, referring to FIG. 5 , the metal connector includes a Dumet wire 332 . The Dumet wire 332 has substantially the same expansion coefficient as the glass. Thus, when the heating element 32 is operating, the Dumet wire 332 can expand synchronously with the glass, thereby avoiding the occurrence of gaps caused by different expansion coefficients, thereby ensuring the sealing effect of the sealing portion 34 .

[0113] As an example, referring to Figure 6, the metal connector includes a molybdenum sheet 333 and a molybdenum rod 334. One end of the molybdenum rod 334 is welded to the heating element 32, and the other end is connected to the molybdenum sheet 334 embedded in the sealing portion 34. Molybdenum and glass have approximately the same expansion coefficient.

[0114] Other materials having substantially the same expansion coefficient as that of glass may also be used to make the support portion 33 .

[0115] Since the support portion 33 cannot generate heat, it has a lower temperature. When the aerosol-generating product 1 includes a plug arranged upstream of the aerosol-forming substrate 11, after the aerosol-generating product 1 is coupled to the aerosol-generating device, at least a portion of the support portion 33 is located in the plug, and the plug surrounds the periphery of the support portion 33, thereby preventing the temperature of the plug from being too high.

[0116] It should be noted that the specification and drawings of this application provide preferred embodiments of the present application, but are not limited to the embodiments described in this specification. Furthermore, it is possible for a person skilled in the art to make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A heating component, characterized in that: include: a housing at least partially transmissive to infrared light; and a heating element for heating the aerosol-generating article, wherein at least a portion of the heating element is disposed within the housing and extends along the length of the housing, the heating element comprising a heating element and an infrared radiation layer disposed on the heating element, the infrared radiation layer being capable of absorbing heat generated by the heating element and radiating infrared rays; Part of the heating element is in contact with the inner wall surface of the shell, and at least part of the outer side surface of the heating element arranged relative to the inner wall surface of the shell is spaced apart from the inner wall surface of the shell.

2. The heating assembly according to claim 1, wherein The heating element includes a susceptor capable of generating heat in a changing magnetic field.

3. The heating assembly according to claim 2, wherein At least a portion of the surface of the susceptor where the infrared radiation layer is arranged is spaced apart from the inner wall surface of the housing.

4. The heating assembly according to claim 2 or 3, characterized in that The heating element is substantially tubular, and the outer diameter of at least a portion of the heating element in the length direction is reduced relative to the outer diameter of other portions.

5. The heating assembly according to claim 4, wherein The tube wall of the heating element is provided with one or more through holes.

6. The heating assembly according to claim 4, wherein The heating element includes a first end portion, a second end portion, and a main body portion located between the first end portion and the second end portion; The first end portion and / or the second end portion has one or more notches.

7. The heating assembly according to claim 1, wherein The heating element includes a first end, a second end, and a main body located between the first end and the second end; The cross-sectional area of ​​the first end portion is larger than the cross-sectional area of ​​the main body portion, and at least a portion of the first end portion contacts the inner wall surface of the shell; and / or The cross-sectional area of ​​the second end portion is larger than the cross-sectional area of ​​the main body portion, and at least a portion of the second end portion contacts the inner wall surface of the shell.

8. The heating assembly according to claim 6 or 7, characterized in that The outer side surface of the main body is spaced apart from the inner wall surface of the shell.

9. The heating assembly according to claim 1, wherein The contact between the heating element and the inner wall surface of the housing includes at least one of point contact, line contact and surface contact.

10. The heating assembly according to claim 1, wherein The heating assembly further includes a support portion that supports the heating element so that at least a portion of the heating element remains inside the housing.

11. The heating assembly according to claim 10, wherein The supporting portion has a supporting end for supporting the heating element; The support end only partially contacts the heating element; or The contact between the supporting end and the heating element includes at least one of point contact, line contact and surface contact.

12. The heating assembly according to claim 10, wherein The support portion is a hollow tubular structure or a porous body.

13. The heating assembly according to claim 1, wherein The heating component further includes a sealing portion. One end of the shell is a closed conical structure, and the other end opposite thereto is sealed by the sealing portion.

14. The heating assembly according to claim 1, wherein Part of the outer wall surface of the shell is concave to reduce the contact area between the shell and the aerosol generating article.

15. An aerosol generating device, characterized in that: The heating component comprises the heating component according to any one of claims 1 to 14, further comprising a accommodating cavity and a power supply component, wherein at least a portion of the heating component is arranged in the accommodating cavity, the accommodating cavity is used to accommodate at least a portion of the aerosol-generating article, and the power supply component is used to provide power for the heating component to heat the aerosol-generating article.

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