Aerosol generation system and heating apparatus

Abstract

An aerosol generation system and a heating apparatus. The aerosol generation system comprises a replaceable aerosol generation product (200) and a reusable heating apparatus (100). The replaceable aerosol generation product (200) comprises a substrate (210) and an aerosol generation matrix (220), wherein the substrate (210) can be penetrated by a varying magnetic field to generate heat, thereby heating the aerosol generation matrix (220) to generate aerosol. The reusable heating apparatus (100) comprises at least one magnetic field generator (300) and at least one first magnetic shielding member (171), wherein the at least one magnetic field generator (300) can generate a varying magnetic field, and the magnetic field generator (300) is substantially planar and has a first side and a second side; the aerosol generation product (200) is received on the first side; and at least part of the at least one first magnetic shielding member (171) is located on or near the second side of the at least one magnetic field generator (300), such that, during usage, the varying magnetic field generated by the at least one magnetic field generator (300) is concentrated or distorted towards the first side of the at least one magnetic field generator (300).

Description

Aerosol generating system and heating device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the prior application with application number 202410077305.6 filed with the State Intellectual Property Office of China on January 18, 2024, entitled “Aerosol Generating System and Heating 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-not-burn aerosol generation, and in particular to an aerosol generation system and a heating 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] An example of such a product is a heating device that releases compounds by heating rather than burning a material. For example, the material may be tobacco or other non-tobacco products, which may or may not contain nicotine. U.S. Patent No. 5,479,948A proposes a heating device that gradually transfers sections or locations of a tape-like aerosol-generating substrate to a heating element for heating. This heating device heats the tape-like aerosol-generating substrate in a manner that allows for accurate and consistent aerosol delivery to the consumer with each puff. Summary of the Invention

[0006] One embodiment of the present application provides an aerosol generating system, comprising:

[0007] A replaceable aerosol-generating article comprising a base and an aerosol-generating substrate; the aerosol-generating substrate being configured to generate an aerosol when heated; the base being configured to be penetrated by a changing magnetic field to generate heat, thereby heating the aerosol-generating substrate;

[0008] Reusable heating device, comprising:

[0009] at least one magnetic field generator configured to be substantially planar and having first and second opposite sides, the at least one magnetic field generator being capable of generating a varying magnetic field that penetrates the substrate when the aerosol-generating article is received or positioned on the first side;

[0010] At least one first magnetic shield is at least partially located on or near the second side of the magnetic field generator to concentrate or distort the varying magnetic field generated by the magnetic field generator towards the first side of the magnetic field generator in use.

[0011] In some embodiments, the magnetic field generator includes or is a planar spiral coil.

[0012] In some embodiments, the first magnetic shield is planar or sheet-shaped; and the first magnetic shield is arranged in parallel with the magnetic field generator.

[0013] In some embodiments, the first magnetic shield is adhered to or bonded to the surface of the second side of the magnetic field generator.

[0014] In some embodiments, an area of ​​the first magnetic shield is greater than or equal to an area of ​​the magnetic field generator.

[0015] In some embodiments, the first magnetic shield has a laminated structure or a multi-layer structure.

[0016] In some embodiments, the first magnetic shield comprises:

[0017] a functional layer for providing magnetic shielding;

[0018] A flexible supporting layer is provided, wherein the functional layer is combined with the flexible supporting layer and supported by the flexible supporting layer.

[0019] In some embodiments, the heating device further comprises:

[0020] At least one second magnetic shield is arranged around the circumference of the magnetic field generator to provide magnetic field shielding outside the circumference of the magnetic field generator.

[0021] In some embodiments, the heating device further comprises:

[0022] a receiving cavity, adjacent to or located on a first side of the magnetic field generator, for receiving the aerosol-generating article;

[0023] The first bracket is located between the magnetic field generator and the receiving cavity and at least partially defines the receiving cavity.

[0024] In some embodiments, the aerosol-generating article is configured to be substantially planar or sheet-like in shape; when the aerosol-generating article is received in the receiving cavity, the aerosol-generating article is in substantially planar contact with the first support.

[0025] In some embodiments, when the aerosol-generating article is received in the receiving cavity, the aerosol-generating article rests against the first support and defines a gap between the aerosol-generating article and the first support.

[0026] In some embodiments, the heating device further comprises:

[0027] The second bracket is close to or located at a second side of the magnetic field generator and at least partially accommodates or supports the magnetic field generator.

[0028] In some embodiments, at least one cavity is arranged on the second bracket, and the magnetic field generator is accommodated or retained in the cavity.

[0029] In some embodiments, the second bracket is provided with:

[0030] At least one annular rim surrounds the magnetic field generator.

[0031] In some embodiments, the first magnetic shield is located between the second bracket and the magnetic field generator.

[0032] In some embodiments, the aerosol-generating substrate comprises a plurality of substrate units arranged discretely or in an array on the base;

[0033] The heating device includes a plurality of magnetic field generators; the heating device is configured to control the plurality of magnetic field generators to sequentially generate a changing magnetic field one after another in a predetermined order, so as to heat one of the matrix units individually each time to generate an aerosol sufficient for one inhalation.

[0034] Yet another embodiment of the present application provides a heating device configured to heat a substantially sheet-shaped aerosol-generating article to generate an aerosol; the heating device comprising:

[0035] a receiving chamber for receiving the aerosol-generating article;

[0036] at least one magnetic field generator, being substantially planar and configured to generate a varying magnetic field penetrating the receiving cavity; the magnetic field generator having a first side facing the receiving cavity and a second side facing away from the first side;

[0037] At least one first magnetic shield is at least partially located on or near the second side of the magnetic field generator to concentrate or distort the changing magnetic field generated by the at least one magnetic field generator towards the first side of the magnetic field generator and / or the receiving cavity in use.

[0038] Yet another embodiment of the present application provides a heating device configured to heat a substantially sheet-shaped aerosol-generating article to generate an aerosol; the heating device comprising:

[0039] a receiving chamber for receiving the aerosol-generating article;

[0040] at least one magnetic field generator, constructed to be substantially planar and configured to generate a varying magnetic field penetrating the receiving cavity, the magnetic field generator being arranged substantially parallel to the receiving cavity;

[0041] At least one second magnetic shield is arranged around the circumference of the magnetic field generator to provide magnetic field shielding outside the circumference of the magnetic field generator.

[0042] The aerosol generating system provided by the above embodiment enables the magnetic field generated by the planar magnetic field generator of the heating device to be concentrated toward the first side, which is beneficial for improving the utilization rate of the magnetic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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.

[0044] FIG1 is a schematic diagram of an aerosol generating system provided by one embodiment;

[0045] FIG2 is an exploded schematic diagram of the aerosol generating system in FIG1 from one perspective;

[0046] FIG3 is a schematic diagram of the heater and the bracket in FIG2 after assembly;

[0047] FIG4 is a schematic diagram of the heater, bracket, first magnetic shield and second magnetic shield in FIG2 before assembly from another perspective;

[0048] 5 is a cross-sectional schematic diagram of the heater, bracket, first magnetic shield and second magnetic shield in FIG. 4 after assembly from one viewing angle;

[0049] FIG6 is a schematic cross-sectional view of the aerosol generating article in FIG2 from one perspective;

[0050] FIG7 is a cross-sectional schematic diagram of an aerosol-generating article according to another embodiment from one perspective;

[0051] FIG8 is a cross-sectional schematic diagram of a heater, a bracket and a magnetic shielding member after being assembled according to another embodiment from one viewing angle.

[0052] Reference numerals: 100, heating device; 110, first housing; 111, air inlet; 112, air outlet; 120, second housing; 130, battery cell; 140, circuit board; 150, first bracket; 160, second bracket; 161, annular ridge; 162, notch; 163, cavity; 171, first magnetic shield; 172, second magnetic shield; 200, aerosol-generating article; 210, base; 211, groove; 220, aerosol-generating matrix; 300, magnetic field generator (planar spiral coil); 310, conductive lead; 400, bracket; 160a, bracket; 161a, annular ridge; 170a, magnetic shield; 171a, first portion; 172a, second portion; 200a, aerosol-generating article; 210a, substrate; 211a, cavity or hole; 220a, aerosol-generating matrix; 230a, support layer; 300a, planar spiral coil. DETAILED DESCRIPTION

[0053] In order to facilitate the understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" / "fixed to" another element, it can be directly on the other element, or one or more intermediate elements can exist therebetween. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements can exist therebetween. The terms "upper", "lower", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0054] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0055] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0056] In the embodiments of the present application, the "installation" includes fixing or restricting a component or device to a specific position or place by welding, screwing, clamping, bonding, etc. The component or device can remain stationary at a specific position or place or can move within a limited range. After the component or device is fixed or restricted to a specific position or place, it may or may not be disassembled, which is not limited in the embodiments of the present application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0058] Example 1:

[0059] One embodiment of the present application provides an aerosol generating system for heating an aerosol generating article that can be a consumable material to generate an aerosol.

[0060] In some embodiments, the aerosol generating system may include a reusable heating device and replaceable consumables such as an aerosol generating article. The replaceable consumables such as an aerosol generating article are received or combined with the reusable heating device to form the aerosol generating system.

[0061] For example, FIG1 and FIG2 show schematic diagrams of an aerosol generating system according to an embodiment; in this embodiment, the aerosol generating system includes:

[0062] The aerosol-generating product 200 is a replaceable consumable, and the heating device 100 accommodates and receives the aerosol-generating product 200 and heats it.

[0063] In the embodiment shown in Figures 1 and 2, the heating device 100 includes several components disposed within an outer body or housing (which may be referred to as a shell). The overall design of the outer body or housing may vary, and the type or configuration of the outer body, which may define the overall size and shape of the heating device 100, may vary. Generally, the elongated body may be formed from a single, unitary shell, or the elongated shell may be formed from two or more separable bodies.

[0064] For example, the heating device 100 may have a control body on one side having a housing containing one or more reusable components (e.g., a battery such as a rechargeable battery and / or a rechargeable supercapacitor, and various electronic devices for controlling the operation of the article) and a heating mechanism for heating the aerosol-generating article 200 on the other side.

[0065] In some embodiments, the outer body or housing of the heating device 100 substantially defines the outer surface of the heating device 100. In the specific embodiment shown in Figures 1-2, the heating device 100 includes:

[0066] The housing may include one or more reusable components; the housing has a first side and a second side that are opposite to each other in the thickness direction; in use, the first side is the side of the housing that is opened by a user to receive or remove the aerosol-generating article 200; the second side is a side of the electronic chamber. In some examples, all or only a portion of the housing may be formed of a metal or alloy such as stainless steel or aluminum, or other suitable materials include various plastics (e.g., polycarbonate), metal-plated plastic, ceramic, and the like.

[0067] In some embodiments, the housing of the heating device 100 is formed by several components. As shown in Figures 1 and 2, the housing of the heating device 100 includes:

[0068] The first housing 110 and the second housing 120 are configured such that the first housing 110 is adjacent to and defines a first side, and the second housing 120 is adjacent to and defines a second side. In embodiments, the first housing 110 is removable from the second housing 120 to facilitate operation for replacing or receiving the aerosol-generating article 200. In some embodiments, the first housing 110 and the second housing 120 are detachably connected via protrusions or grooves, snaps, magnets, or other connection methods; the first housing 110 can be removed from the second housing 120. When the first housing 110 is separated or removed from the second housing 120, the user can then receive the aerosol-generating article 200 into the heating device 100 or replace or remove it.

[0069] As shown in FIG1 to FIG3 , the heating device 100 further includes:

[0070] a rechargeable battery cell 130 for power supply;

[0071] The circuit board 140 is, for example, a PCB (Printed Circuit Board) or an FPC (Flexible Printed Circuit Board), and is provided with circuits.

[0072] The battery cells 130 and the circuit board 140 are disposed in the second housing 120 .

[0073] In some embodiments, the output voltage of the battery cell 130 is in the range of 2.5V (V represents volts) to 6V, the output current is in the range of 2A (A represents amperes) to 10A, and the output power is in the range of 5W (W represents watts) to 60W.

[0074] As shown in FIG1 to FIG3 , the heating device 100 further includes:

[0075] A heating mechanism, located in the first housing 110 , for receiving the aerosol-generating article 200 and capable of being powered by the circuit board 140 to heat the aerosol-generating article 200 ; the heating mechanism comprises a plurality of magnetic field generators 300 arranged in an array;

[0076] The bracket 400 is combined with or mounted on the second housing 120 . The bracket 400 is used to support and hold the heating mechanism and is located between the heating mechanism and the second side and / or the electronic chamber and / or the circuit board 140 .

[0077] As shown in FIG1 to FIG5 , the heating device 100 further includes:

[0078] The receiving cavity is defined between the heating mechanism and the first shell 110 for receiving the aerosol-generating product 200 ; and when the aerosol-generating product 200 is received in the receiving cavity, the aerosol-generating product 200 is clamped and fixed by the first shell 110 and the heating mechanism.

[0079] As shown in Figures 1 to 6, the aerosol-generating article 200 is generally configured in a sheet-like shape; the sheet-like shape can be characterized as the length of the aerosol-generating article 200 being greater than or equal to the width, and the width being greater than the thickness. The aerosol-generating article 200 includes:

[0080] A base 210 , and an aerosol-generating substrate 220 disposed on the base 210 .

[0081] In some embodiments, the substrate 210 is sheet-shaped. The substrate 210 has a thickness of approximately 0.03 mm to 1.0 mm (mm represents millimeters). In a more preferred embodiment, the substrate 210 has a thickness of approximately 0.03 mm to 0.2 mm. In some specific embodiments, the substrate 210 has a thickness of 0.26 mm.

[0082] In some embodiments, the aerosol-generating substrate 220 is a continuous thin layer disposed on the substrate 210 ; for example, the aerosol-generating substrate 220 substantially completely covers at least one side surface of the substrate 210 .

[0083] As shown in Figures 1 to 6 , the aerosol-generating substrate 220 includes at least one or more discretely arranged substrate units. The substrate 210 is provided with at least one or more discretely arranged grooves 211; the at least one or more substrate units of the aerosol-generating substrate 220 are respectively arranged in the at least one or more grooves 211. Specifically, each of the plurality of substrate units of the aerosol-generating substrate 220 is respectively held in one of the plurality of grooves 211 of the substrate 210.

[0084] In some embodiments, the aerosol-generating substrate 220 and / or substrate unit can be used to refer to a substrate capable of releasing volatile compounds that can form an aerosol. The volatile compounds can be released to generate an aerosol by heating the aerosol-generating substrate 220 and / or substrate unit. In some typical embodiments, the aerosol-generating substrate 220 and / or substrate unit is or can include a solid or gel at room temperature.

[0085] In some embodiments, the aerosol-generating substrate 220 and / or substrate unit may include one or more of powder, particles, shredded strips, ribbons or flakes of one or more of herb leaves, tobacco leaves, homogenized tobacco, expanded tobacco; or, the solid aerosol-generating substrate 220 and / or substrate unit may contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

[0086] In some embodiments, the aerosol-generating substrate 220 and / or the substrate unit may include an active substrate; the active substrate includes or is derived from one or more plant products or components thereof; for example, in some specific embodiments, the active substrate includes plant leaves, bark, fibrous tissue, stems, roots, petals, fruits, etc.; for example, in a specific embodiment, the active substrate includes or is derived from one or more plant species or components, derivatives, or extracts thereof, and the plant species is tobacco. For example, in a specific embodiment, the active substrate includes a mixture of plants such as tobacco and Chinese herbal medicine. The active substrate may include tobacco or tobacco-containing materials; for example, the active substrate may include any of the following: tobacco leaves, tobacco leaf vein segments, reconstituted tobacco, homogenized tobacco, extruded tobacco, tobacco slurry, cast leaf tobacco, and expanded tobacco.

[0087] In some optional embodiments, the aerosol-generating substrate 220 and / or the substrate unit further comprises: a flavorant; the flavorant may comprise a volatile flavor component. For example, in typical embodiments, the flavorant may provide a flavor selected from menthol, lemon, vanilla, orange, wintergreen, cherry, and cinnamon; the flavorant may comprise a volatile tobacco flavoring compound that is released from the aerosol-generating substrate 220 and / or the substrate unit upon heating.

[0088] In some optional embodiments, the aerosol-generating substrate 220 and / or the substrate unit further comprises an aerosol-forming agent or a smoke-generating agent, which facilitates the formation of a dense and stable aerosol during use. In some specific embodiments, the aerosol-forming agent or a smoke-generating agent is or comprises at least one of glycerin, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and the like.

[0089] In some optional embodiments, the aerosol generating matrix 220 and / or the matrix unit further includes: an adhesive; the adhesive promotes the bonding of the components in the aerosol generating matrix 220 and / or the matrix unit during use; for example, in some specific embodiments, the adhesive is or includes at least one of gum arabic, casein, dextrin, sodium carboxymethyl cellulose, starch, polyvinyl alcohol, guar gum, etc.

[0090] In some optional embodiments, the aerosol-generating substrate 220 and / or the substrate unit further comprises reinforcing fibers. The reinforcing fibers generally have a fiber strength greater than that of the tobacco plant fibers in the active substrate, thereby enhancing the strength and plasticity of the aerosol-generating substrate 220 and / or the substrate unit during use. For example, in some specific embodiments, the reinforcing fibers comprise at least one of softwood fibers, hardwood fibers, hemp fibers or flax fibers, bamboo fibers, and the like.

[0091] In a specific embodiment, the aerosol generating matrix 220 and / or matrix unit includes: 65 to 90 wt% (wt% represents mass percentage) of active substrate, 3 wt% to 10 wt% of reinforcing fiber, 0 wt% to 5 wt% of adhesive, 5 wt% to 15 wt% of flavor, and 10 wt% to 20 wt% of aerosol former or smoke generator.

[0092] Or in another specific embodiment, the aerosol generating matrix 220 and / or matrix unit includes: 65wt% to 90wt% active substrate, 3wt% to 10wt% reinforcing fiber, 0wt% to 5wt% adhesive, 5wt% to 15wt% flavor, and 15wt% to 40wt% aerosol former or smoke generator.

[0093] In some embodiments, the aerosol-generating substrate 220 and / or substrate units have an areal density of 20 to 150 g / m 2 (g / m 2 Indicates grams per square meter).

[0094] In some embodiments, the thickness of the aerosol-generating substrate 220 and / or the substrate units is 0.1 mm to 0.6 mm. In some embodiments, the thickness of the aerosol-generating substrate 220 and / or the substrate units is greater than the thickness of the base 210.

[0095] In some embodiments, the water content of the aerosol-generating substrate 220 and / or substrate elements is from 6 wt % to 14 wt %.

[0096] In some embodiments, the aerosol-generating substrate 220 and / or substrate unit may include multiple sublayers. For example, in some optional embodiments, the aerosol-generating substrate 220 and / or substrate unit may include a first sublayer and a second sublayer in a laminated or stacked arrangement. The first sublayer may include an active substrate, reinforcing fibers, an aerosol-forming agent or a smoke-generating agent, etc., while the second sublayer primarily includes a flavoring agent. During use, the first sublayer is used to generate the aerosol, while the second sublayer is used to adjust or modify the aerosol's flavor or aroma.

[0097] Alternatively, in some embodiments, the aerosol-generating substrate 220 and / or substrate unit having multiple sublayers may include a first sublayer and a second sublayer in a laminated or stacked arrangement. The first sublayer may include an active substrate, such as tobacco; the second sublayer may include a flavoring agent, and any one or more functional additives such as an adhesive, a moisture barrier, a mildew inhibitor, and an antimicrobial agent. For example, the second sublayer may include 0 to 20 wt% of a flavoring agent, 80 to 100 wt% of an adhesive, 0 to 0.2 wt% of a moisture barrier, 0 to 0.5 wt% of a mildew inhibitor, and 0 to 0.5 wt% of an antimicrobial agent.

[0098] In this embodiment, the adhesive of the second sublayer includes at least one of gum arabic, casein, dextrin, sodium carboxymethyl cellulose, starch, polyvinyl alcohol, and guar gum; the moisture-proof agent may include at least one of dimethyl fumarate, anhydrous calcium chloride, and a super absorbent resin; the mildew-proof agent includes at least one of biphenyl, o-phenylphenol, 2-pyridinethiol-1-zinc oxide, ammonium persulfate, and calcium phosphate; and the antibacterial agent may be a metal oxide or metal ion inorganic antibacterial agent.

[0099] In some other embodiments, the thickness of the second sublayer of the aerosol generating matrix 220 and / or the matrix unit is 0.001 mm to 0.1 mm; during preparation, the second sublayer is coated on the substrate 210 by spraying, brushing, film transfer, etc., and then the first sublayer is combined with the surface of the second sublayer by rolling or casting to form a multi-sublayer aerosol generating matrix 220 and / or matrix unit.

[0100] Alternatively, in yet other variations, the aerosol-generating substrate 220 and / or the substrate elements may comprise a gel and / or a paste. A gel may be defined as a substantially dilute, cross-linked system that does not exhibit flow in a steady state. A paste may be defined as a viscous fluid such as a paste or slurry; for example, a paste may be a fluid having a dynamic viscosity at rest of greater than 1 Pa·S (Pa·S stands for Pascal·second), 5 Pa·S, or 10 Pa·S.

[0101] In one embodiment, a recognizable marking is disposed on the aerosol-generating substrate 220 and / or the base 210. The marking may be arranged as a recognizable pattern; or in other variations, the marking may be a recognizable color, pattern, number, text, QR code, or the like. In some embodiments, the marking is used to provide an identification indication related to the unique properties of the aerosol-generating article 200. A user or the heating device 100 can obtain the unique properties of the aerosol-generating article 200 by identifying the marking.

[0102] In some embodiments, the unique properties of the aerosol-generating article 200 include various information about the aerosol-generating article 200, such as authenticity information, expiration date, and place of manufacture. In some embodiments, the various information about the aerosol-generating article 200 can be obtained through identification, thereby determining whether the aerosol-generating article 200 is authentic, when the aerosol-generating article 200 has expired, and where the aerosol-generating article 200 was manufactured. As a result, users may not inadvertently use an inauthentic aerosol-generating article 200, an expired aerosol-generating article 200, or an aerosol-generating article 200 from an unexpected source location.

[0103] In yet other embodiments, the unique properties of the aerosol-generating article 200 may include the flavor of the flavorant contained in the aerosol-generating substrate 220, such as peach, mint, or orange.

[0104] As another example, in some embodiments, a unique property of the aerosol-generating article 200 may include the strength of nicotine contained in the aerosol-generating substrate 220 , such as the nicotine content.

[0105] In the embodiments shown in Figures 1 to 6, substrate 210 is rigid or hard. In some embodiments, substrate 210 is made of a receptive metal or alloy; thus, during use, substrate 210 can be heated by electromagnetic induction or by being penetrated by a changing magnetic field, which in turn heats aerosol-generating matrix 220 to produce an aerosol. In some specific embodiments, the receptive metal or alloy used to prepare or form substrate 210 is, for example, at least one of iron or an iron alloy, nickel or a nickel alloy, cobalt or a cobalt alloy, graphite, ordinary carbon steel, stainless steel, ferritic stainless steel, and permalloy. In some specific embodiments, substrate 210 comprises permalloy with an alloy grade of 1J50 or 1J85; for example, the permalloy substrate 210 may contain an iron content of between 15% and 85% by weight, and a nickel content of no more than 85% by weight.

[0106] In the embodiment shown in Figures 1 to 6, the aerosol-generating substrate 220 and / or the substrate unit is disposed on only one side surface of the substrate 210. For example, when the aerosol-generating article 200 is received in the heating device 100 during use, the aerosol-generating substrate 220 and / or the substrate unit is located on the side surface of the substrate 210 facing the first side. During use, the heating mechanism of the heating device 100 applies heat to the second side of the substrate 210, causing aerosol to be released from the first side of the substrate 210.

[0107] In the embodiment shown in FIG. 1 to FIG. 6 , the heating mechanism of the heating device 100 includes:

[0108] At least one or more magnetic field generators 300 are arranged in an array or discretely spaced apart. When the aerosol-generating article 200 is received in the receiving chamber, the plurality of magnetic field generators 300 induce heating of the aerosol-generating article 200 by generating a magnetic field.

[0109] Specifically, as shown in Figures 1 to 6, when the aerosol-generating article 200 is received in the receiving chamber, the multiple magnetic field generators 300 are respectively opposite to the substrate units of the aerosol-generating substrate 220, and each magnetic field generator 300 can heat the opposite substrate unit separately.

[0110] In the embodiment shown in Figures 1 to 6 , the magnetic field generator 300 is substantially planar. In an embodiment, the magnetic field generator 300 comprises a planar spiral coil 300. When the aerosol-generating article 200 is received in the receiving chamber, the magnetic field generator 300 is arranged substantially parallel to the base 210 and / or the substrate elements of the aerosol-generating substrate 220. In Figures 1 to 6 , the planar spiral coil 300 is circular in shape; in other alternative embodiments, the planar spiral coil 300 is square, oval, or the like.

[0111] In some embodiments, when the aerosol-generating article 200 is received in the receiving chamber, the planar spiral coil 300 is arranged substantially parallel to the substrate 210. Furthermore, the spacing between the planar spiral coil 300 and the substrate 210 is 15 mm; more preferably, the spacing between the planar spiral coil 300 and the substrate 210 is 10 mm. In some embodiments, the spacing between the planar spiral coil 300 and the substrate 210 is less than the diameter of the planar spiral coil 300.

[0112] In an embodiment, multiple planar spiral coils 300 are connected to a circuit board 140. Circuit board 140 can independently supply alternating currents to each of the multiple planar spiral coils 300, causing each to independently generate magnetic fields, thereby independently activating heating. For example, in some embodiments, several or more planar spiral coils 300 can be independently activated, allowing each planar spiral coil 300 to heat only the corresponding substrate unit.

[0113] In some embodiments, the circuit board 140 is configured to control the heating of the plurality of planar spiral coils 300, one after another, in a predetermined order. In some embodiments, the circuit board 140 is configured to control the heating of the plurality of planar spiral coils 300 at different times; for example, during each puff by a user, the circuit board 140 controls only one planar spiral coil 300 to heat and generate aerosol sufficient for one puff. In some embodiments, during each puff, the circuit board 140 controls one of the plurality of planar spiral coils 300 to heat individually. The amount of total particulate matter (TPM) generated by one unit of the aerosol-generating substrate 220 may be at least 1.5 mg, at least 1.7 mg, at least 2.0 mg, at least 2.5 mg, at least 3.0 mg, about 1.0 mg to about 5.0 mg, about 1.5 mg to about 4.0 mg, about 2.0 mg to about 4.0 mg, or about 2.0 mg to about 3.0 mg, at least 3 mg to about 7 mg, about 4 mg to about 8 mg, or about 5 mg to about 10 mg.

[0114] In some embodiments, during multiple puffs by a user, the circuit board 140 controls the predetermined sequence of the planar spiral coils 300, activating heating one after another. Specifically, as shown in FIG1 , during the user's first puff, the circuit board 140 provides power to the first planar spiral coil 300 closest to the left for heating, generating aerosol for one puff. During the user's next puff, the circuit board 140 provides power to the second planar spiral coil 300 closest to the left for heating, generating aerosol for one puff. This process continues until all planar spiral coils 300 are heated, the aerosol-generating substrate 220 has been puffed through, and the user is prompted to replace the aerosol-generating article 200. In the above embodiments, activating the planar spiral coils 300 individually rather than simultaneously means minimizing unnecessary consumption of the aerosol-generating substrate and reducing energy waste. Alternatively, in other embodiments, the order in which the multiple planar spiral coils 300 are activated in a predetermined sequence is along the direction of the array arrangement.

[0115] Alternatively, in some alternative implementations, the circuit board 140 controls the individual activation of the plurality of planar spiral coils 300 sequentially and without intervals along the arrangement direction of the planar spiral coils 300. Alternatively, in some alternative implementations, the circuit board 140 controls the individual activation of the plurality of planar spiral coils 300 sequentially and without intervals or in a skipped manner.

[0116] For example, in some embodiments, several or more planar spiral coils 300 can be energized sequentially, i.e., energized once per user puff, thereby consistently generating aerosol with each puff. Accordingly, in some embodiments, each user puff can be sensed by an airflow sensor, such as a microphone or a MEMS (Micro-Electro-Mechanical Systems) sensor; based on the airflow sensor's sensing results, the circuit board 140 sequentially energizes the several or more planar spiral coils 300. In a preferred embodiment, the circuit board 140 controls the sequential activation of the several planar spiral coils 300 in a predetermined order, based on the user's puffing action. In further variations, the circuit board 140 controls the sequential activation of the several planar spiral coils 300 at predetermined intervals; for example, the predetermined interval is between approximately 30 seconds and 300 seconds.

[0117] For example, in some other embodiments, the circuit board 140 controls the sequential activation of the plurality of planar spiral coils 300 in a predetermined order based on the operational input signals from the heating device 100. For example, the heating device 100 may be provided with input elements, such as switch buttons, touch screens, and knobs, which can be operated by a user to generate input signals. Based on the operational input signals generated by the user operating the input elements, the circuit board 140 controls the sequential activation of the plurality of planar spiral coils 300 in a predetermined order.

[0118] In some embodiments, the circuit board 140 controls the sequential activation of the plurality of planar spiral coils 300 in a predetermined order, based on the removal or replacement of the aerosol-generating article 200. Specifically, in some embodiments, after the circuit board 140 controls the sequential activation of the planar spiral coils 300, the user is notified that the aerosol-generating article 200 has been consumed and is prompted to replace the aerosol-generating article 200 with a new one.

[0119] In some embodiments, upon detecting that a new aerosol-generating article 200 has been re-received into the receiving chamber of the heating device 100, the planar spiral coils 300 are reactivated sequentially according to a predetermined sequence. Detection of a user replacing an aerosol-generating article 200 with a new one can be performed using a sensor; for example, the aerosol-generating device can be provided with a light sensor or a pressure sensor to sense the engagement or removal of the aerosol-generating article 200 into or from the receiving chamber, and to determine the user's replacement or consumption of the aerosol-generating article 200 based on the engagement or removal.

[0120] In some embodiments, circuit board 140 controls the sequential activation of planar spiral coils 300 in a cyclical manner. For example, in some embodiments, the cycle repeats a predetermined number of times, such as 10 times. Specifically, when the number of activations of planar spiral coils 300, and / or the number of puffs taken by the user, and / or the number of input signals received by the input element, reaches a predetermined number, a new cycle begins, controlling the sequential activation of planar spiral coils 300.

[0121] As another example, in some embodiments, the cycle is performed based on the removal or replacement of the aerosol-generating article 200 .

[0122] In some embodiments, the circuit board 140 controls the plurality of planar spiral coils 300 to generate magnetic fields to induce heating of the opposing portions of the substrate 210 according to the same heating curve. For example, in some specific embodiments, the circuit board 140 controls the generation of magnetic fields to induce heating of the opposing portions of the substrate 210 according to a temperature of 300° C. (° C. represents degrees Celsius).

[0123] Alternatively, in some alternative embodiments, the circuit board 140 controls the plurality of planar spiral coils 300 to induce heating of the opposing portions of the substrate 210 according to different heating curves or temperatures. For example, in some implementations, the circuit board 140 controls the plurality of planar spiral coils 300 to induce the heating temperatures of the opposing portions of the substrate 210 to increase or decrease sequentially along a heating activation sequence.

[0124] For example, in some embodiments, circuit board 140 is configured to sequentially activate several or more planar spiral coils 300, such that no two spatially adjacent planar spiral coils 300 are activated consecutively. Advantageously, this can minimize preheating of portions of substrate 210 that are respectively opposite to the plurality of planar spiral coils 300, which can reduce the likelihood of thermal decomposition of adjacent substrate units.

[0125] For example, in some embodiments, the circuit board 140 is configured to sequentially supply power to the planar spiral coil 300 at a given power level, such that the opposing portion of the substrate 210 reaches an operating temperature within a predetermined time. For example, each time the circuit board 140 supplies power to the planar spiral coil 300, the opposing portion of the substrate 210 reaches a temperature of at least approximately 200 degrees Celsius, at least 300 degrees Celsius, or at least 400 degrees Celsius within 0.5 seconds (s represents seconds), maintains the temperature for approximately 2.5 seconds, and then stops.

[0126] In some embodiments, planar spiral coil 300 is helically wound from a low-resistivity wire material, such as a conductive copper wire or silver wire. In some embodiments, the wire material used to wind planar spiral coil 300 has a circular cross-sectional shape; in other embodiments, the wire material used to wind planar spiral coil 300 has a rectangular, oval, or triangular cross-sectional shape. In some embodiments, the wire material used to wind planar spiral coil 300 is Litz wire, which has multiple or multiple conductive filaments.

[0127] As shown in FIG1 , an air inlet 111 and an air outlet 112 are disposed at both ends of the first housing 110 in the longitudinal direction. An airflow channel is formed within the heating device 100 between the air inlet 111 and the air outlet 112. When the aerosol-generating article 200 is received within the heating device 100, the aerosol-generating substrate 220 is exposed to the airflow channel. Therefore, when a user inhales at the air outlet 112, the inhaled airflow delivers the aerosol to the air outlet 112, as indicated by arrow R2 in FIG1 .

[0128] As shown in Figures 1 to 6, the heating mechanism further includes:

[0129] The first support 150 is used to support the aerosol-generating article 200 .

[0130] The first bracket 150 is positioned proximate to the first side, or positioned between the planar spiral coil 300 and the receiving cavity. After assembly, the spacing between the first bracket 150 and the first housing 110 defines a receiving cavity for receiving the aerosol-generating article 200. When the aerosol-generating article 200 is received within the heating device 100, the aerosol-generating article 200 abuts against and contacts the first bracket 150. In the embodiments of Figures 1 to 6, the surface of the first bracket 150 facing the first side, or the surface of the first bracket 150 exposed to the receiving cavity, is flat. When the aerosol-generating article 200 is received within the heating device 100, the aerosol-generating article 200 contacts the flat surface of the first bracket 150, or the substrate 210 and the first bracket 150 are in substantially planar contact.

[0131] Alternatively, in some alternative embodiments, the surface of the first bracket 150 facing the receiving cavity or the surface of the first bracket 150 exposed to the receiving cavity is non-flat; for example, the surface of the first bracket 150 facing the first side or the surface of the first bracket 150 exposed to the receiving cavity is uneven, and the surface of the first bracket 150 facing the first side or the surface of the first bracket 150 exposed to the receiving cavity has a plurality of raised structures and recessed structures. When the aerosol-generating article 200 is received in the heating device 100, the aerosol-generating article 200 and / or the substrate 210 abuts against and contacts the raised structures on the surface of the first bracket 150, and a plurality of gaps are defined between the aerosol-generating article 200 and the surface of the first bracket 150 to prevent or reduce heat transfer from the substrate 210 to the first bracket 150. Alternatively, in some other embodiments, the air flow channel defined between the air inlet 111 and the air outlet 112 flows through the gap defined between the aerosol generating article 200 and / or the substrate 210 and the surface of the first bracket 150; it is beneficial to carry away heat through the air flow and thereby reduce conduction to the first bracket 150.

[0132] In some embodiments, the aerosol-generating article 200 includes a magnetic material, or the substrate 210 is magnetic, and can be magnetically attracted by a magnetic element, such as a magnet. Accordingly, a magnetic element, such as a magnet, is disposed within the heating device 100. Thus, when the aerosol-generating article 200 is received within the heating device 100 / receiving chamber, it is attracted by the magnetic element of the heating device 100, thereby stably receiving the aerosol-generating article 200 within the receiving chamber. In some embodiments, the magnetic element is disposed or mounted on the first bracket 150.

[0133] In some embodiments, the heating device further comprises:

[0134] At least one or more temperature sensors, such as thermocouples, etc. When the aerosol generating article 200 is received in the receiving chamber, the at least one or more temperature sensors abut against the substrate 210 to sense the heating temperature of the substrate 210 generated by the magnetic field.

[0135] As shown in Figures 1 to 6 , the heating mechanism further includes a second bracket 160 for accommodating and supporting the planar spiral coil 300. Second bracket 160 is positioned near the second side, or alternatively, between the planar spiral coil 300 and the second housing 120. Specifically, after assembly, the first bracket 150 and the second bracket 160 combine to form a hollow interior box, thereby accommodating and retaining the planar spiral coil 300 therebetween.

[0136] As shown in Figures 1 to 6 , the second bracket 160 is provided with a plurality of annular protrusions 161 on the surface facing the first side and / or the first bracket 150. The annular protrusions 161 surround or define a cavity 163. After assembly, the plurality of planar spiral coils 300 are respectively accommodated and mounted within the cavities 163 defined by the annular protrusions 161, and are thereby surrounded and isolated by the annular protrusions 161. Each annular protrusion 161 is also provided with a notch 162. After assembly, the conductive leads 310 of the planar spiral coils 300 pass from within the annular protrusion 161 through the notch 162 to the outside of the annular protrusion 161, then pass through the second bracket 160 and connect to the circuit board 140. The conductive leads 310 are used to conduct current through the planar spiral coils 300.

[0137] In some embodiments, the first support 150 and the second support 160 are non-sensitive. In some embodiments, the first support 150 and / or the second support 160 are made of non-sensitive materials such as organic polymers, ceramics, and glass.

[0138] As shown in FIG1 to FIG6 , the heating device 100 further includes:

[0139] First magnetic shield 171 is generally configured in a planar or sheet-like shape. It is generally parallel to planar spiral coil 300. It is positioned between planar spiral coil 300 and second bracket 160; alternatively, it can be positioned between planar spiral coil 300 and circuit board 140 / battery core 130. Consequently, first magnetic shield 171 minimizes the magnetic field generated by planar spiral coil 300 from reaching circuit board 140 / battery core 130, thereby concentrating or distorting the magnetic field energy as much as possible toward base 210 or the receiving cavity.

[0140] In some embodiments, the first magnetic shield 171 is attached or bonded to the surface of the second side of the planar spiral coil 300 . Alternatively, the first magnetic shield 171 is attached or bonded to the surface of the second bracket 160 .

[0141] As shown in FIG1 to FIG6 , the heating device 100 further includes:

[0142] The second magnetic shield 172 is generally annular in shape and is circumferentially arranged around the planar spiral coil 300 to reduce the magnetic field radially outward from the planar spiral coil 300. The diameter of the second magnetic shield 172 is greater than the axial dimension of the second magnetic shield 172.

[0143] In an embodiment, the second magnetic shield 172 is coupled to or disposed on the annular flange 161 of the second bracket 160 . The second magnetic shield 172 is supported by the annular flange 161 of the second bracket 160 .

[0144] In some embodiments, the first magnetic shield 171 and / or the second magnetic shield 172 may also be provided in the form of a thin sheet material or a coating, for example.

[0145] In some embodiments, the first magnetic shield 171 and / or the second magnetic shield 172 may comprise, for example, ferrite. Ferrite may refer to a magnetic material based on a magnetic metal oxide, including magnetic ceramics. Typically, ferrite may comprise an oxide or composite oxide of a ferromagnetic metal. The first magnetic shield 171 and / or the second magnetic shield 172 comprised of ferrite material may have high electrical conductivity and high magnetic permeability. Alternatively, in yet other embodiments, the first magnetic shield 171 and / or the second magnetic shield 172 may be comprised of a highly magnetically permeable alloy, such as an iron-based alloy, and may be included in the first magnetic shield 171 and / or the second magnetic shield 172.

[0146] Alternatively, in some other embodiments, the first magnetic shield 171 and / or the second magnetic shield 172 have a laminated or multi-layer structure. For example, the first magnetic shield 171 and / or the second magnetic shield 172 may include at least: a magnetic shielding functional layer and a flexible support layer. The magnetic shielding functional layer may be made of the above-mentioned ferrite material or high-permeability alloy to provide magnetic shielding; the flexible support layer may include polyethylene terephthalate (PET) or polyimide (PI) to provide a buffer for assembly and extrusion, thereby reducing cracking or powdering of the magnetic shielding functional layer.

[0147] Alternatively, in some other embodiments, the first magnetic shield 171 and / or the second magnetic shield 172 may further include an adhesive layer bonded to the magnetic shielding functional layer or the flexible support layer, for assembling and securing the first magnetic shield 171 and / or the second magnetic shield 172 by adhesive bonding; for example, the first magnetic shield 171 may be bonded to the second side of the planar spiral coil 300, or the second magnetic shield 172 may be bonded to the outside of the annular flange 161 of the second bracket 160. The adhesive layer may be made of, for example, at least one of epoxy resin, polyparaxylene polymer, or polyparaxylene polymer.

[0148] In some embodiments, the first magnetic shield 171 is substantially in the shape of a square or circular sheet. The area of ​​the first magnetic shield 171 is greater than or equal to the area of ​​the planar spiral coil 300. In some embodiments, the planar spiral coil 300 has a diameter of approximately 5 mm to 10 mm; accordingly, the area of ​​the first magnetic shield 171 is 50 mm. 2 Up to 200mm 2 (mm 2 represents square millimeters).

[0149] In some embodiments, the first magnetic shield 171 and / or the second magnetic shield 172 has a thickness of approximately 0.2 mm to 2.0 mm. The first magnetic shield 171 and / or the second magnetic shield 172 is configured in the form of a thin film.

[0150] In the first embodiment described above, second bracket 160 is made of a conventional material such as polymer or ceramic. Alternatively, in other embodiments, second bracket 160 may comprise a ferrite material or a magnetic alloy. Second bracket 160 is used to minimize the magnetic field on the second side of planar spiral coil 300, thereby concentrating or distorting the magnetic field generated by planar spiral coil 300 toward the first side and / or the receiving cavity. In this embodiment, second bracket 160 not only accommodates and supports planar spiral coil 300 but also provides magnetic flux concentration, which facilitates the omission of first and second magnetic shields 171 and 172.

[0151] Example 2:

[0152] FIG7 shows a schematic diagram of an aerosol-generating article 200 a according to another embodiment. In the second embodiment, the aerosol-generating article 200 a comprises:

[0153] A sheet-like support layer 230a having a plurality of discrete or arrayed cavities or holes 211a;

[0154] A plurality of substrates 210a are discretely or arrayedly arranged in the cavities or holes 211a of the support layer 230a; each of the plurality of substrates 210a is respectively arranged in one of the plurality of cavities or holes 211a of the support layer 230a;

[0155] The aerosol generating substrate 220a includes a plurality of substrate units, each of which is located within the plurality of cavities or holes 211a and is in thermal conductivity or contact with the substrate 210a. Each of the plurality of substrate units is bonded to one of the plurality of substrates 210a.

[0156] In the embodiment shown in FIG7 , the support layer 230a is mainly used to support the base 210a and the aerosol generating matrix 220a. In some embodiments, the support layer 230a includes or is paper; for example, the support layer 230a includes fiber paper made from wood fiber, hemp fiber or flax fiber, bamboo fiber, etc. Or in some other variations, the support layer 230a can be made of metal, ceramic, glass, plastic, etc. The support layer 230a is insulating. The support layer 230a is made of a material with low thermal conductivity and low mass heat capacity, such as zirconium oxide, glass, PEEK (Polyetheretherketone), etc., and the long-term temperature resistance needs to be no less than 250°C.

[0157] In the embodiment shown in FIG7 , substrate 210a is made of a receptive metal or alloy. When the aerosol-generating article 200a is received in a heating device, the plurality of substrates 210a are inductively coupled relative to the plurality of planar spiral coils 300a. Thus, during use, the planar spiral coils 300 generate a magnetic field to induce heating of the substrate 210a relative to the substrate 210a, thereby causing the substrate 210a to heat the substrate units of the aerosol-generating substrate 220a in thermal contact or in direct contact with the substrate 210a. The substrate 210a is primarily composed of aluminum, nickel, and ferromagnetic materials such as iron-based alloys, nickel-based alloys, stainless steels such as 420 stainless steel or 430 stainless steel, graphite, and carbon. Alternatively, the Curie temperature of the substrate 210a is not less than 300°C; more preferably, the Curie temperature of the substrate 210a is not less than 400°C.

[0158] In Example 1 or Example 2:

[0159] FIG8 shows a schematic diagram of a heating device according to another embodiment; the heating device shown in FIG8 comprises:

[0160] A plurality of planar spiral coils 300a for generating a magnetic field to induce the opposing portion of the substrate 210 or the substrate 210a to heat the substrate units of the aerosol generating substrate 220 / 200a;

[0161] Bracket 160a is at least partially located on the second side of the plurality of planar spiral coils 300a and accommodates and supports the plurality of planar spiral coils 300a on the second side of the planar spiral coils 300a. Bracket 160a is provided with a plurality of annular flanges 161a, and the plurality of planar spiral coils 300a are respectively accommodated and retained within the plurality of annular flanges 161a.

[0162] The heating device shown in FIG8 further includes:

[0163] The magnetic shield 170a is configured to be concave. The magnetic shield 170a includes:

[0164] The first portion 171 a is located on the second side of the planar spiral coil 300 a to minimize the magnetic field generated outside the planar spiral coil 300 a ;

[0165] The second portion 172a is formed by extending the first portion 171a. The second portion 172a is annular and circumferentially surrounds the planar spiral coil 300a to provide magnetic field shielding on the circumferential outer side of the planar spiral coil 300a.

[0166] In the embodiment shown in FIG8 , the first portion 171a and the second portion 172a of the magnetic shield 170a are connected or integral. For example, in some embodiments, the magnetic shield 170a can be a coating formed by spraying or depositing the aforementioned ferrite material on the inside of the annular flange 161a, or a magnetic shielding film adhered to the inside of the annular flange 161a, thereby connecting or integrally forming the first portion 171a and the second portion 172a.

[0167] 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. An aerosol generating system, characterized in that, Comprising: A replaceable aerosol-generating article, including a substrate and an aerosol-generating substrate; the aerosol-generating substrate is configured to be capable of generating an aerosol when heated; The substrate is configured to be penetrated by a varying magnetic field and generate heat, thereby heating the aerosol-generating substrate; A reusable heating device, including: At least one magnetic field generator, which is substantially configured to be planar and has opposite first and second sides; when the aerosol-generating article is received or located on the first side, the at least one magnetic field generator can generate a varying magnetic field that penetrates the substrate; At least one first magnetic shielding member, at least partially located at or near the second side of the magnetic field generator, to concentrate or distort the varying magnetic field generated by the magnetic field generator toward the first side of the magnetic field generator during use.

2. The aerosol generating system according to claim 1, characterized in that, The magnetic field generator includes or is a planar spiral coil.

3. The aerosol generating system according to claim 1 or 2, characterized in that, The first magnetic shielding member is planar or sheet-like; the first magnetic shielding member is arranged parallel to the magnetic field generator.

4. The aerosol generating system according to claim 1 or 2, characterized in that, The first magnetic shielding member is adhered or bonded to the surface of the second side of the magnetic field generator.

5. The aerosol generating system according to claim 3, wherein, The area of the first magnetic shielding member is greater than or equal to the area of the magnetic field generator.

6. The aerosol generating system according to claim 1 or 2, characterized in that The first magnetic shielding member has a laminated structure or a multi-layer structure.

7. The aerosol generating system according to claim 1 or 2, wherein The first magnetic shielding member includes: A functional layer for providing magnetic shielding; A flexible support layer, the functional layer is bonded to the flexible support layer and is supported by the flexible support layer.

8. The aerosol generating system according to claim 1 or 2, characterized in that, The heating device further includes: At least one second magnetic shielding member, arranged circumferentially around the magnetic field generator, for providing magnetic shielding outside the circumference of the magnetic field generator.

9. The aerosol generating system according to claim 1 or 2, characterized in that, The heating device further includes: A receiving cavity, near or located on the first side of the magnetic field generator, for receiving the aerosol-generating article; A first bracket, located between the magnetic field generator and the receiving cavity and at least partially defining the receiving cavity.

10. The aerosol generating system according to claim 9, characterized in that, The aerosol-generating article is substantially configured to be planar or sheet-like in shape; when the aerosol-generating article is received in the receiving cavity, the aerosol-generating article is in substantially planar contact with the first bracket.

11. The aerosol generating system according to claim 9, wherein When the aerosol-generating article is received in the receiving cavity, the aerosol-generating article abuts against the first bracket and there is a gap defined between the aerosol-generating article and the first bracket.

12. The aerosol generating system according to claim 1 or 2, characterized in that, The heating device further includes: A second bracket, near or located on the second side of the magnetic field generator, and at least partially accommodating or supporting the magnetic field generator.

13. The aerosol generating system according to claim 12, characterized in that, At least one concave cavity is arranged on the second bracket, and the magnetic field generator is accommodated or held in the concave cavity.

14. The aerosol generating system according to claim 12, wherein Arranged on the second bracket are: At least one annular convex edge, surrounding the magnetic field generator.

15. The aerosol-generating system according to claim 12, wherein, The first magnetic shielding member is located between the second bracket and the magnetic field generator.

16. The aerosol generating system according to claim 1 or 2, characterized in that, The aerosol-generating substrate includes a plurality of substrate units arranged discretely or in an array on the substrate; The heating device includes a plurality of the magnetic field generators; the heating device is configured to control the plurality of magnetic field generators one after another in a predetermined order to sequentially generate a varying magnetic field, so as to heat one of the substrate units individually each time to generate an aerosol sufficient for one puff.

17. A heating device configured to heat an aerosol - generating article that is substantially sheet - shaped to generate an aerosol; characterized in that, The heating device comprises: a receiving cavity for receiving the aerosol-generating article; at least one magnetic field generator, which is substantially configured to be planar and is configured to be able to generate a changing magnetic field penetrating the receiving cavity; the magnetic field generator has a first side facing the receiving cavity and a second side facing away from the first side; at least one first magnetic shielding member, at least partially located at or near the second side of the magnetic field generator to concentrate or distort, in use, the changing magnetic field generated by the at least one magnetic field generator towards the first side of the magnetic field generator and / or the receiving cavity.

18. A heating device configured to heat an aerosol - generating article substantially in sheet form to generate an aerosol; characterized in that, The heating device comprises: a receiving cavity for receiving the aerosol-generating article; at least one magnetic field generator, which is substantially configured to be planar and is configured to be able to generate a changing magnetic field penetrating the receiving cavity, the magnetic field generator being arranged substantially parallel to the receiving cavity; at least one second magnetic shielding member, arranged circumferentially around the magnetic field generator for providing magnetic shielding outside the circumference of the magnetic field generator.

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