Aerosol generating system and heating device

Abstract

The invention provides an aerosol generating system and a heating device. The aerosol generating system comprises a replaceable aerosol generating product which comprises a base body and an aerosol generating substrate; the substrate can be penetrated by a changing magnetic field to generate heat, and the aerosol generating substrate is heated to generate aerosol; a reusable heating device comprising: at least one magnetic field generator capable of generating a varying magnetic field; the magnetic field generator is substantially planar and has a first side and a second side; the aerosol-generating article is received at the first side; at least one first magnetic shield at least partially located at or near the second side of the at least one magnetic field generator to concentrate or distort, in use, the varying magnetic field generated by the at least one magnetic field generator toward the first side of the at least one magnetic field generator. According to the aerosol generating system, the magnetic field generated by the planar magnetic field generator of the heating device is concentrated towards the first side, so that the utilization rate of the magnetic field is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of heat-not-burn aerosol generation, and particularly to an aerosol generation system and a heating device. Background Art

[0002] During the use of tobacco products (such as cigarettes, cigars, etc.), tobacco is burned to generate tobacco smoke. People have tried to replace these tobacco-burning products by manufacturing products that release compounds without burning.

[0003] Examples of such products are heating devices that release compounds by heating rather than burning materials. For example, the material can be tobacco or other non-tobacco products, which may or may not contain nicotine. The heating device proposed in US Patent US5479948A drives a tape-type aerosol generation substrate to gradually drive a part or position of the aerosol generation substrate onto a heating element for heating; such a heating device drives and heats the tape-type aerosol generation substrate to allow a consistent aerosol delivery amount to be accurately provided to consumers in each puff. Summary of the Invention

[0004] An embodiment of the present application provides an aerosol generation system, including:

[0005] A replaceable aerosol generation article, including a substrate and an aerosol generation matrix; the aerosol generation matrix is configured to be able to generate an aerosol when heated; the substrate is configured to be penetrated by a changing magnetic field and generate heat, thereby heating the aerosol generation matrix;

[0006] A reusable heating device, including:

[0007] At least one magnetic field generator, which is basically configured to be planar and has opposite first and second sides; when the aerosol generation article is received or located on the first side, the at least one magnetic field generator can generate a changing magnetic field that penetrates the substrate;

[0008] 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 changing magnetic field generated by the magnetic field generator toward the first side of the magnetic field generator during use.

[0009] In some embodiments, the magnetic field generator includes or is a planar spiral coil.

[0010] In some embodiments, the first magnetic shielding member is planar or sheet-shaped; the first magnetic shielding member is arranged parallel to the magnetic field generator.

[0011] In some embodiments, the first magnetic shielding member is pasted or bonded to the surface of the second side of the magnetic field generator.

[0012] In some embodiments, the area of the first magnetic shielding member is greater than or equal to the area of the magnetic field generator.

[0013] In some embodiments, the first magnetic shielding member has a laminated structure or a multi-layer structure.

[0014] In some embodiments, the first magnetic shielding member includes:

[0015] A functional layer for providing magnetic shielding;

[0016] A flexible support layer, the functional layer is bonded to the flexible support layer and is supported by the flexible support layer.

[0017] In some embodiments, the heating device further includes:

[0018] At least one second magnetic shielding member, arranged circumferentially around the magnetic field generator, for providing magnetic field shielding on the outer side of the circumference of the magnetic field generator.

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

[0020] A receiving cavity, near or located on the first side of the magnetic field generator, for receiving the aerosol-generating article;

[0021] A first bracket, located between the magnetic field generator and the receiving cavity, and at least partially defining the receiving cavity.

[0022] In some embodiments, the aerosol-generating article is substantially configured to be planar or sheet-shaped; when the aerosol-generating article is received in the receiving cavity, the aerosol-generating article is in substantially planar contact with the first bracket.

[0023] In some embodiments, 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.

[0024] In some embodiments, the heating device further includes:

[0025] 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.

[0026] In some embodiments, at least one concave cavity is arranged on the second bracket, and the magnetic field generator is received or held in the concave cavity.

[0027] In some embodiments, the second bracket is provided with:

[0028] At least one annular flange surrounds the magnetic field generator.

[0029] In some embodiments, the first magnetic shield is located between the second bracket and the magnetic field generator.

[0030] In some embodiments, the aerosol-generating substrate comprises a plurality of substrate units arranged discretely or in an array on the base;

[0031] The heating device comprises 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.

[0032] Yet another embodiment of the present application further provides a heating device, which is configured to heat a substantially sheet-shaped aerosol-generating article to generate an aerosol; the heating device comprises:

[0033] a receiving chamber for receiving the aerosol generating article;

[0034] at least one magnetic field generator, substantially planar in structure 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;

[0035] At least one first magnetic shield is at least partially located at or near the second side of the magnetic field generator to focus 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.

[0036] Yet another embodiment of the present application further provides a heating device, which is configured to heat a substantially sheet-shaped aerosol-generating article to generate an aerosol; the heating device comprises:

[0037] a receiving chamber for receiving the aerosol generating article;

[0038] at least one magnetic field generator, which is substantially planar and configured to generate a changing magnetic field penetrating the receiving cavity, the magnetic field generator being arranged substantially parallel to the receiving cavity;

[0039] 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.

[0040] The above aerosol generating system is beneficial for improving the magnetic field utilization rate by concentrating the magnetic field generated by the magnetic field generator on the plane of the heating device towards the first side. Description of the Drawings

[0041] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit 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 a scale limitation.

[0042] Figure 1 is a schematic diagram of an aerosol generating system provided by an embodiment;

[0043] Figure 2 is Figure 1 an exploded schematic diagram of the aerosol generating system from one perspective in;

[0044] Figure 3 is Figure 2 a schematic diagram of the heater and the bracket after assembly in;

[0045] Figure 4 is Figure 2 a schematic diagram of another perspective of the heater, the bracket, the first magnetic shielding member and the second magnetic shielding member before assembly in;

[0046] Figure 5 is Figure 4 a schematic cross-sectional view of one perspective of the heater, the bracket, the first magnetic shielding member and the second magnetic shielding member after assembly in;

[0047] Figure 6 is Figure 2 a schematic cross-sectional view of one perspective of the aerosol generating article in;

[0048] Figure 7 is a schematic cross-sectional view of one perspective of the aerosol generating article of another embodiment;

[0049] Figure 8 is a schematic cross-sectional view of one perspective of the heater, the bracket and the magnetic shielding member after assembly of another embodiment. Detailed Description of the Embodiments

[0050] To facilitate the understanding of the present application, the present application will be described in more detail below with reference to the drawings and specific embodiments.

[0051] An embodiment of the present application provides an aerosol generating system for heating an aerosol generating article that can be used as a consumable to generate an aerosol.

[0052] In some embodiments, an aerosol-generating system may include a reusable heating device and a replaceable consumable such as an aerosol-generating article. The replaceable consumable such as an aerosol-generating article is received or coupled to the reusable heating device to form an aerosol-generating system.

[0053] For example Figures 1 to 2 FIG. shows a schematic view of an aerosol-generating system according to an embodiment; in this embodiment, the aerosol-generating system includes:

[0054] An aerosol-generating article 200 as a replaceable consumable, and a heating device 100 that houses and receives the aerosol-generating article 200 and heats it.

[0055] In Figure 1 and Figure 2 In the illustrated embodiment, the heating device 100 includes several components disposed within an external body or housing (which may be referred to as a casing). The overall design of the external body or housing may vary, and the type or configuration of the external body that defines the overall size and shape of the heating device 100 may vary. Generally, the elongated body may be formed from a single integral casing, or the elongated casing may be formed from two or more separable bodies.

[0056] For example, the heating device 100 may have a control body on one side, the control body having a casing that contains one or more reusable components (e.g., a storage 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.

[0057] In some embodiments, the external body or housing of the heating device 100 substantially defines the outer surface of the heating device 100; in Figures 1 to 2 the illustrated specific embodiment, the heating device 100 includes:

[0058] A housing that may contain one or more reusable components; the housing has a first side and a second side that face away from each other in the thickness direction; in use, the first side is the side by which the user operates to open the housing to receive or remove the aerosol-generating article 200; the second side is the side of the electronic chamber. In some examples, all or only a portion of the housing may be formed from a metal or alloy such as stainless steel, aluminum, or other suitable materials including various plastics (e.g., polycarbonate), metal-plating over plastic, ceramics, etc.

[0059] In some embodiments, the housing of the heating device 100 is formed by several components together. According to Figure 1 and Figure 2As shown, the housing of the heating device 100 includes:

[0060] A first housing 110 and a second housing 120; wherein, 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 an embodiment, the first housing 110 can be removed from the second housing 120, so as to facilitate the operation for replacing or receiving the aerosol-generating article 200. In some embodiments, a detachable connection is formed between the first housing 110 and the second housing 120 through connection means such as protrusions or grooves, snaps, magnetic attraction, etc.; 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, at this time, the user can operate to receive the aerosol-generating article 200 in the heating device 100 or replace and remove it.

[0061] According to Figures 1 to 3 As shown, the heating device 100 further includes:

[0062] A rechargeable battery cell 130 for power supply;

[0063] A circuit board 140, such as a PCB board or an FPC board, with circuits arranged thereon.

[0064] The battery cell 130 and the circuit board 140 are arranged in the second housing 120.

[0065] In some embodiments, the output voltage of the battery cell 130 is in the range of 2.5V to 6V, the output current is in the range of 2A to 10A, and the power that can be output is in the range of 5W to 60W.

[0066] According to Figures 1 to 3 As shown, the heating device 100 further includes:

[0067] 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 includes a plurality of or a plurality of magnet generators 300 arranged in an array;

[0068] A bracket 400, which is coupled or mounted to the second housing 120; the bracket 400 is used to support and hold the heating mechanism. The bracket 400 is located between the heating mechanism and the second side and / or the electronic chamber and / or the circuit board 140.

[0069] According to Figures 1 to 5 As shown, the heating device 100 further includes:

[0070] A receiving cavity, defined between the heating mechanism and the first housing 110, for receiving the aerosol-generating article 200; and when the aerosol-generating article 200 is received in the receiving cavity, the aerosol-generating article 200 is clamped and fixed by the first housing 110 and the heating mechanism.

[0071] As shown in Figures 1 to 6 FIG. 2, the aerosol - generating article 200 is generally configured to be in a sheet - like shape; the sheet - like shape can be characterized in that the length of the aerosol - generating article 200 is greater than or equal to the width, and the width is greater than the thickness. The aerosol - generating article 200 includes:

[0072] a substrate 210 and an aerosol - generating substrate 220 disposed on the substrate 210.

[0073] In some embodiments, the substrate 210 is sheet - like. The substrate 210 has a thickness of approximately 0.03 - 1.0 mm. In a more preferred embodiment, the substrate 210 has a thickness of approximately 0.03 - 0.2 mm. In some specific embodiments, the thickness of the substrate 210 is 0.26 mm.

[0074] 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.

[0075] As shown in Figures 1 to 6 FIG. 3, the aerosol - generating substrate 220 includes at least one or more discretely - arranged substrate units. At least one or more discretely - arranged cavities 211 are disposed on the substrate 210; at least one or more substrate units of the aerosol - generating substrate 220 are respectively disposed in at least one or more cavities 211. Specifically, each of the plurality of substrate units of the aerosol - generating substrate 220 is respectively held in one of the plurality of cavities 211 of the substrate 210.

[0076] In some embodiments, the aerosol - generating substrate 220 and / or the substrate unit can be used to mean a substrate capable of releasing volatile compounds that can form an aerosol. The volatile compounds can be released by heating the aerosol - generating substrate 220 and / or the substrate unit to generate an aerosol. In some general embodiments, the aerosol - generating substrate 220 and / or the substrate unit is or can include a solid or a gel at room temperature.

[0077] In some embodiments, the aerosol - generating substrate 220 and / or the substrate unit can include one or more of powder, granules, fragments, strips, or flakes of vanilla leaves, tobacco leaves, homogenized tobacco, expanded tobacco; or, the solid aerosol - generating substrate 220 and / or the substrate unit can contain additional tobacco or non - tobacco volatile flavor compounds to be released when the substrate is heated.

[0078] In some embodiments, the aerosol - generating substrate 220 and / or the substrate unit may include an active substrate; the active substrate comprises or is derived from one or more plant products or their components; for example, in some specific embodiments, the active substrate includes the leaves, bark, fibrous tissues, stems, roots, petals, fruits, etc. of plants; for example, in a specific embodiment, the active substrate comprises or is derived from one or more plant varieties or their components, derivatives or extracts, and the plant variety is tobacco. For example, in a specific embodiment, the active substrate includes a mixture of plants such as tobacco and Chinese herbal medicines. The active substrate may include tobacco or tobacco - containing materials; for example, the active substrate may include any one of the following: tobacco leaves, tobacco vein fragments, reconstituted tobacco, homogenized tobacco, extruded tobacco, tobacco slurry, cast - leaf tobacco, and expanded tobacco.

[0079] In some alternative embodiments, the aerosol - generating substrate 220 and / or the substrate unit further includes: a flavor; the flavor may contain volatile fragrance components. For example, in common embodiments, the flavor may provide a fragrance selected from menthol, lemon, vanilla, orange, wintergreen, cherry, and cinnamon; the flavor may include volatile tobacco fragrance compounds released from the aerosol - generating substrate 220 and / or the substrate unit upon heating.

[0080] In some alternative embodiments, the aerosol - generating substrate 220 and / or the substrate unit further includes: an aerosol - forming agent or a fuming agent; the aerosol - forming agent or the fuming agent helps to densify and stabilize the formation of the aerosol during use. In some specific embodiments, the aerosol - forming agent or the fuming agent is or includes at least one of glycerol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, etc.

[0081] In some alternative embodiments, the aerosol - generating substrate 220 and / or the substrate unit further includes: an adhesive; the adhesive promotes the bonding of the components in the aerosol - generating substrate 220 and / or the substrate 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.

[0082] In some alternative embodiments, the aerosol - generating substrate 220 and / or the substrate unit further includes: reinforcing fibers; the fiber strength of the reinforcing fibers is generally higher than that of the tobacco plants 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 include at least one of softwood fibers, hardwood fibers, hemp fibers or linen fibers, bamboo fibers, etc.

[0083] In a specific embodiment, the aerosol - generating substrate 220 and / or the substrate unit includes: 65 - 90 wt% of an active substrate, 3 - 10 wt% of reinforcing fibers, 0 - 5 wt% of an adhesive, 5 - 15 wt% of a flavor, and 10 - 20 wt% of an aerosol - forming agent or a fuming agent.

[0084] Alternatively, in yet another specific embodiment, the aerosol - generating substrate 220 and / or the substrate unit includes: 65 - 90 wt% of an active substrate, 3 - 10 wt% of reinforcing fibers, 0 - 5 wt% of an adhesive, 5 - 15 wt% of a flavor, and 15 - 40 wt% of an aerosol - forming agent or a fuming agent.

[0085] In some embodiments, the areal density of the aerosol - generating substrate 220 and / or the substrate unit is 20 - 150 g / m 2 .

[0086] In some embodiments, the thickness of the aerosol - generating substrate 220 and / or the substrate unit is 0.1 - 0.6 mm. And in some embodiments, the thickness of the aerosol - generating substrate 220 and / or the substrate unit is greater than the thickness of the substrate 210.

[0087] In some embodiments, the water content in the aerosol - generating substrate 220 and / or the substrate unit is 6 - 14 wt%.

[0088] In some embodiments, the aerosol - generating substrate 220 and / or the substrate unit may include multiple sub - layers; for example, in some alternative embodiments, the aerosol - generating substrate 220 and / or the substrate unit may include a first sub - layer and a second sub - layer arranged in a laminated or stacked manner. Among them, the first sub - layer may include an active substrate, reinforcing fibers, an aerosol - forming agent or a fuming agent, etc.; the second sub - layer mainly includes a flavor. Then, in use, the first sub - layer is used to generate aerosol, and the second sub - layer is used to adjust or change properties such as the taste or fragrance of the aerosol.

[0089] Alternatively, in yet some other embodiments, the aerosol - generating substrate 220 and / or the substrate unit having multiple sub - layers may include a first sub - layer and a second sub - layer arranged in a laminated or stacked manner. Among them, the first sub - layer may include an active substrate, such as tobacco; the second sub - layer includes a flavor and any one or several of functional additives such as an adhesive, a moisture - proof agent, a mildew - proof agent, and an antibacterial agent. For example, the second sub - layer includes 0 - 20 wt% of essence flavor, 80 - 100 wt% of an adhesive, 0 - 0.2 wt% of a moisture - proof agent, 0 - 0.5 wt% of a mildew - proof agent, and 0 - 0.5 wt% of an antibacterial agent.

[0090] In this embodiment, the binder of the second sub-layer includes at least one of gum arabic, casein, dextrin, sodium carboxymethyl cellulose, starch, polyvinyl alcohol, guar gum, etc.; the moisture-proof agent may include at least one of dimethyl fumarate, anhydrous calcium chloride, superabsorbent resin, etc.; the mildew-proof agent includes at least one of biphenyl, o-phenylphenol, 2-pyridinethiol-1-zinc oxide, ammonium persulfate, calcium phosphate, etc.; the antibacterial agent can be a metal oxide or a metal ion inorganic antibacterial agent, etc.

[0091] In some other embodiments, the thickness of the second sub-layer of the aerosol-generating substrate 220 and / or the substrate unit is 0.001-0.1 mm; in the preparation, the second sub-layer is coated on the substrate 210 by means such as spraying, brushing, film transfer, etc., and then the first sub-layer is bonded to the surface of the second sub-layer by rolling or casting, etc. to form the multi-sub-layer aerosol-generating substrate 220 and / or the substrate unit.

[0092] Or in some other variant embodiments, the aerosol-generating substrate 220 and / or the substrate unit may include a gel and / or a paste. The gel can be defined as a substantially diluted cross-linked system that does not exhibit flow when in a steady state. The paste can be defined as a viscous fluid such as paste-like or slurry-like; for example, the paste can be a fluid that has a dynamic viscosity greater than 1 Pa·S or 5 Pa·S or 10 Pa·S when at rest.

[0093] In one embodiment, an identifiable identifier is arranged on the aerosol-generating substrate 220 and / or the substrate 210. The identifier can be arranged as an identifiable pattern; or in some other variant embodiments, the identifier is an identifiable color, texture, number, text, two-dimensional code, etc. In some embodiments, the identifier is used to provide an identification indication related to the unique properties of the aerosol-generating article 200. The user or the heating device 100 obtains the unique properties of the aerosol-generating article 200 by identifying the identifier.

[0094] In some embodiments, the unique properties of the aerosol-generating article 200 include various information of the aerosol-generating article 200, for example, authenticity information, expiration date, and place of origin. In some embodiments, the above various information of the aerosol-generating article 200 can be obtained through the identifier, so as to determine whether the aerosol-generating article 200 is genuine, or when the aerosol-generating article 200 has expired and where the aerosol-generating article 200 is manufactured. Therefore, the user may not inadvertently use an inauthentic aerosol-generating article 200, an expired aerosol-generating article 200, or an aerosol-generating article 200 from an undesired source location.

[0095] In some other embodiments, the unique properties of the aerosol-generating article 200 may include the flavor of the fragrance contained in the aerosol-generating substrate 220, such as peach flavor, mint flavor, orange flavor.

[0096] For example, in some embodiments, the unique properties of the aerosol-generating article 200 may include the strength of nicotine contained in the aerosol-generating substrate 220, such as the nicotine content.

[0097] In Figures 1 to 6 In the illustrated embodiment, the substrate 210 is rigid or hard. In some embodiments, the substrate 210 is made of a susceptive metal or alloy; thus, in use, the substrate 210 can be heated by electromagnetic induction or by being penetrated by a changing magnetic field, and then further heat the aerosol-generating substrate 120 to generate an aerosol. In some specific embodiments, the susceptive metal or alloy for preparing or forming the substrate 210 is at least one of, for example, iron or ferrous alloy, nickel or nickel alloy, cobalt or cobalt alloy, graphite, plain carbon steel, stainless steel, ferritic stainless steel, permalloy, etc. In some specific embodiments, the substrate 210 includes a permalloy with an alloy grade of 1J50 or 1J85; for example, in the permalloy substrate 210, the mass percentage of iron ranges from 15 wt% to 85 wt%, and the mass percentage of nickel does not exceed 85 wt%.

[0098] In Figures 1 to 6 In the illustrated embodiment, the aerosol-generating substrate 220 and / or the substrate unit is only arranged on one side surface of the substrate 210; for example, in use, when the aerosol-generating article 200 is received in the heating device 100, the aerosol-generating substrate 220 and / or the substrate unit is located on the side surface of the substrate 210 facing the first side. In use, the heating mechanism of the heating device 100 heats from the second side of the substrate 210, and the aerosol is released from the first side of the substrate 210.

[0099] In Figures 1 to 6 In the illustrated embodiment, the heating mechanism of the heating device 100 includes:

[0100] At least one or more magnetic field generators 300, which are arranged in an array or discretely spaced. When the aerosol-generating article 200 is received in the receiving cavity, the plurality of magnetic field generators 300 induce heating of the aerosol-generating article 200 by generating a magnetic field.

[0101] Specifically, as shown in Figures 1 to 6 When the aerosol-generating article 200 is received in the receiving cavity, the plurality of magnetic field generators 300 are respectively opposite to the substrate units of the aerosol-generating substrate 220, and thus each magnetic field generator 300 can individually heat the opposite substrate unit.

[0102] In Figures 1 to 6In the illustrated embodiment, the magnetic field generator 300 is substantially planar. In an embodiment, the magnetic field generator 300 includes a planar spiral coil 300. When the aerosol-generating article 200 is received in the receiving cavity, the magnetic field generator 300 is arranged substantially parallel to the substrate 210 and / or the matrix unit of the aerosol-forming substrate 220. In Figures 1 to 6 this case, the planar spiral coil 300 is circular in shape; or in some other alternative embodiments, the planar spiral coil 300 is square, oval, or the like.

[0103] In some embodiments, when the aerosol-generating article 200 is received in the receiving cavity, the planar spiral coil 300 is arranged substantially parallel to the substrate 210. And 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.

[0104] In an embodiment, a plurality of planar spiral coils 300 are connected to the circuit board 140, and then an alternating current can be independently provided by the circuit board 140 to enable the plurality of planar spiral coils 300 to independently generate a magnetic field, thereby separately starting heating. For example, in some embodiments, several or a plurality of planar spiral coils 300 are all separately startable; so that each planar spiral coil 300 can only separately heat the corresponding matrix unit.

[0105] In some embodiments, the circuit board 140 is configured to control several or a plurality of planar spiral coils 300 to be heated one after another in a predetermined order. In some embodiments, the circuit board 140 is configured to control several or a plurality of planar spiral coils 300 not to be heated simultaneously; so that, for example, each time the user takes a puff, the circuit board 140 only controls one planar spiral coil 300 to heat to generate an aerosol satisfying one puff. In some embodiments, in each puff, the circuit board 140 controls one of several planar spiral coils 300 to separately heat, and the amount of total particulate matter (TPM) generated by one matrix unit of the aerosol-forming substrate 200 can 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, and about 5 mg to about 10 mg.

[0106] In some embodiments, during multiple puffs by the user, the circuit board 140 controls the predetermined order of several planar spiral coils 300 to start heating one after another in sequence. Specifically, for example, inFigure 1 As shown in the figure: during the user's first puff, the circuit board 140 supplies power to the first planar spiral coil 300 closest to the left side for heating to generate the aerosol for one puff; during the user's next puff, the circuit board 140 supplies power to the second planar spiral coil 300 closest to the left side for heating to generate the aerosol for one puff; and so on. Until all the planar spiral coils 300 have been heated, the matrix units of the aerosol generation matrix 200 have been completely puffed, prompting the user to replace the new aerosol generation article 200. In the above implementation, starting the planar spiral coils 300 sequentially and individually instead of simultaneously means minimizing the unnecessary consumption of the aerosol generation matrix and reducing the waste of energy. Or in some other embodiments, the order in which the multiple planar spiral coils 300 are sequentially started in a predetermined order is along the direction of the array arrangement.

[0107] Or in some other variant embodiments, the circuit board 140 controls the multiple planar spiral coils 300 to be sequentially started individually without interruption along the arrangement direction of the planar spiral coils 300. Or in some other variant embodiments, the circuit board 140 controls several of the planar spiral coils 300 to be sequentially started individually at intervals or in a jumping manner.

[0108] For example, in some embodiments, several or multiple planar spiral coils 300 can be sequentially energized, that is, each time the user puffs, it is energized once, so as to consistently generate aerosol based on each puff. Correspondingly, in some embodiments, each user puffing action can be sensed by an airflow sensor such as a microphone or a MEMS sensor, etc.; the circuit board 140 sequentially supplies power to several or multiple planar spiral coils 300 based on the sensing result of the airflow sensor. In a preferred implementation, the circuit board 140 controls several of the planar spiral coils 300 to be sequentially started in a predetermined order according to the user's puffing action. And in some other variant embodiments, the circuit board 140 controls the sequential start of several of the planar spiral coils 300 at a predetermined interval; for example, the predetermined interval is between about 30 seconds and 300 seconds.

[0109] For example, in some other embodiments, the circuit board 140 controls several of the planar spiral coils 300 to be sequentially started in a predetermined order based on the operation input signal on the above heating device 300. For example, an input element is arranged on the heating device 300, and the input element can include input elements such as a switch button, a touch operation screen, a knob, etc., which can be operated by the user to generate an input signal; the circuit board 140 controls several of the planar spiral coils 300 to be sequentially started in a predetermined order based on the operation input signal formed by the user operating the input element.

[0110] In some embodiments, the circuit board 140 controls a plurality of planar spiral coils 300 to be sequentially activated 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 above-mentioned planar spiral coils 300 to be sequentially activated, the user is prompted that the aerosol generating article 200 has been consumed, and the user is prompted to replace the new aerosol generating article 200.

[0111] And in some embodiments, after detecting that a new aerosol generating article 200 is received again in the receiving cavity of the heating device 300, the planar spiral coils 300 are restarted in a predetermined order. The detection of the user replacing the new aerosol generating article 200 can be detected by a sensor; for example, a light sensor or a pressure sensor is provided in the aerosol generating device to sense the aerosol generating article 200 being combined in or removed from the receiving cavity, and determine the replacement or consumption of the aerosol generating article 200 by the user based on the combination and removal.

[0112] In some embodiments, the circuit board 140 controls the above-mentioned planar spiral coils 300 to be sequentially activated in a cycle. For example, in some embodiments, the cycle is performed a predetermined number of times; for example, 10 times. Specifically, when the number of times the planar spiral coil 300 is activated, and / or the number of times the user inhales, and / or the number of input signals received from the input element reaches a predetermined number, a new cycle is entered to control the planar spiral coils 300 to be sequentially activated.

[0113] Or in some other variant embodiments, the cycle is performed according to the removal or replacement of the aerosol generating article 200.

[0114] In some embodiments, the circuit board 140 controls a plurality of planar spiral coils 300 to generate a magnetic field to induce a portion of the opposing matrix layer 210 to be heated according to the same heating curve. For example, in some specific embodiments, the circuit board 140 controls the generation of a magnetic field to induce a portion of the opposing matrix layer 210 to be heated at a temperature of 300 °C.

[0115] Or in some other variant embodiments, the circuit board 140 controls a plurality of planar spiral coils 300 to induce a portion of the opposing matrix layer 210 to be heated according to different heating curves or heating temperatures. For example, in some embodiments, the circuit board 140 controls a plurality of planar spiral coils 300 to induce the heating temperature of a portion of the opposing matrix layer 210 to increase or decrease sequentially along the heating start order.

[0116] For example, in some embodiments, the circuit board 140 is configured to sequentially activate several or multiple planar spiral coils 300 such that no two spatially adjacent planar spiral coils 300 are activated consecutively. Advantageously, this can minimize the preheating of multiple portions of the substrate layer 210 that are respectively opposite to the multiple planar spiral coils 300, which can reduce the likelihood of thermal decomposition of adjacent multiple substrate units.

[0117] For example, in some embodiments, the circuit board 140 is configured to sequentially supply power to the planar spiral coils 300 in a given power sequence such that portions of the opposite substrate layer 210 reach the operating temperature at a predetermined time. For example, each time the circuit board 140 supplies power to the planar spiral coils 300, portions of the opposite substrate layer 210 reach a temperature of about at least 200 degrees, or at least 300 degrees, or at least 400 degrees within 0.5 s and stop after maintaining for about 2.5 s.

[0118] In some embodiments, the planar spiral coils 300 are helically wound from a wire material with low resistivity. For example, the planar spiral coils 300 are helically wound from conductive copper wire or silver wire, etc. In some embodiments, the wire material for winding the planar spiral coils 300 has a circular cross-sectional shape; or in still other embodiments, the wire material for winding the planar spiral coils 300 has a cross-sectional shape such as rectangular, oval, or triangular. In some embodiments, the wire material for winding the planar spiral coils 300 is Litz wire, which has multiple or multi-strand conductive filaments.

[0119] According to Figure 1 As shown, air inlets 111 and air outlets 112 are further arranged at both ends of the first housing 110 in the length direction; an air flow channel located between the air inlets 111 and the air outlets 112 is formed in the heating device 100. When the aerosol-generating article 200 is received in the heating device 100, the aerosol-generating matrix 220 is exposed to the air flow channel, so that when the user sucks at the air outlet 112, the suction air flow delivers the aerosol to the air outlet 112, as Figure 1 shown by the arrow R2 in

[0120] According to Figures 1 to 6 As shown, the heating mechanism further includes:

[0121] A first bracket 150 for supporting the aerosol-generating article 200.

[0122] Among them, the first bracket 150 is arranged close to the first side; or the first bracket 150 is located between the planar spiral coil 300 and the receiving cavity; after assembly, a receiving cavity for receiving the aerosol generating article 200 is defined by the spacing space between the first bracket 150 and the first housing 110. When the aerosol generating article 200 is received in the heating device 100, the aerosol generating article 200 abuts against and contacts the first bracket 150. In Figures 1 to 6 In an embodiment, 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 in the heating device 100, the aerosol generating article 200 contacts at the flat surface of the first bracket 150; or, the matrix 210 is in substantially planar contact with the first bracket 150.

[0123] Or in some other 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 an uneven surface, and there are a number of protruding structures and recessed structures on the surface of the first bracket 150 facing the first side or the surface of the first bracket 150 exposed to the receiving cavity. When the aerosol generating article 200 is received in the heating device 100, the aerosol generating article 200 and / or the matrix 210 abut against and contact the protruding structures on the surface of the first bracket 150, and there are a number of gaps defined between the aerosol generating article 200 and / or the matrix 210 and the surface of the first bracket 150, so as to prevent or reduce the heat conduction of the matrix 210 to the first bracket 150. Or in some other embodiments, the airflow channel defined between the air inlet 111 and the air outlet 112 flows through the gaps defined between the aerosol generating article 200 and / or the matrix 210 and the surface of the first bracket 150; it is beneficial to carry away the heat through the airflow and thus reduce the conduction to the first bracket 150.

[0124] In some embodiments, the aerosol generating article 200 includes a magnetic material, or the matrix 210 is magnetic, and thus can be magnetically adsorbed by a magnetic element such as a magnet. Correspondingly, a magnetic element such as a magnet is arranged in the heating device 100. Thus, when the aerosol generating article 200 is received in the heating device 100 / the receiving cavity, it can be adsorbed by the magnetic element of the heating device 100, so that the aerosol generating article 200 is stably received in the receiving cavity. In some embodiments, the magnetic element is arranged or mounted on the first bracket 150.

[0125] In some embodiments, the heating device further includes:

[0126] At least one or more temperature sensors, such as thermocouples. When the aerosol generating article 200 is received in the receiving cavity, at least one or more temperature sensors abut against the base body 210, so as to sense the heating temperature of the base body 210 heated by the penetration of the magnetic field.

[0127] According to Figures 1 to 6 As shown, the heating mechanism further includes: a second bracket 160 for accommodating and supporting the planar spiral coil 300. The second bracket 160 is arranged close to the second side; or the second bracket 160 is located between the planar spiral coil 300 and the second housing 120. Specifically, after assembly, the first bracket 150 and the second bracket 160 are combined to form an inner hollow box, and then the planar spiral coil 300 is accommodated and held between them.

[0128] According to Figures 1 to 6 As shown, a plurality of annular ridges 161 are arranged on the surface of the second bracket 160 facing the first side and / or the first bracket 150. The annular ridges 161 surround or define the concave cavity 163. After assembly, a plurality of planar spiral coils 300 are respectively accommodated and installed in the concave cavities 163 defined by being surrounded by the plurality of annular ridges 161, and then are respectively surrounded and isolated by the plurality of annular ridges 161. A notch 162 is also arranged on each annular ridge 161; after assembly, the conductive leads 310 of the planar spiral coil 300 pass through from inside the annular ridge 161 to the outside of the annular ridge 161 via the notch 162, and then penetrate through the second bracket 160 and are connected to the circuit board 140. The conductive leads 310 are used to conduct current on the planar spiral coil 300.

[0129] In some embodiments, the first bracket 150 and the second bracket 160 are non-magnetic sensitive. In some embodiments, the first bracket 150 and / or the second bracket 160 are made of non-magnetic sensitive materials such as organic polymers, ceramics, glass, etc.

[0130] According to Figures 1 to 6 As shown, the heating device 100 further includes:

[0131] A first magnetic shielding member 171, which is basically configured to be planar or sheet-shaped. The first magnetic shielding member 171 is basically parallel to the planar spiral coil 300. The first magnetic shielding member 171 is arranged between the planar spiral coil 300 and the second bracket 160; or the first magnetic shielding member 171 is arranged between the planar spiral coil 300 and the circuit board 140 / cell 130. Thus, the first magnetic shielding member 171 minimizes the magnetic field generated by the planar spiral coil 300 reaching the circuit board 140 / cell 130, and further concentrates or twists the magnetic field energy as much as possible towards the base body 210 or the receiving cavity.

[0132] In some embodiments, the first magnetic shielding member 171 is adhered or bonded to the surface of the second side of the planar spiral coil 300. Alternatively, the first magnetic shielding member 171 is adhered or bonded to the surface of the second bracket 160.

[0133] As shown in accordance with Figures 1 to 6 , the heating device 100 further includes:

[0134] A second magnetic shielding member 172, which is substantially configured in an annular shape; the second magnetic shielding member 172 is arranged circumferentially around the planar spiral coil 300 to reduce the magnetic field on the outer side in the radial direction of the planar spiral coil 300. The diameter of the second magnetic shielding member 172 is greater than the axial dimension of the second magnetic shielding member 172.

[0135] In an embodiment, the second magnetic shielding member 172 is combined or arranged on the annular flange 161 of the second bracket 160. The second magnetic shielding member 172 is supported by the annular flange 161 of the second bracket 160.

[0136] In some embodiments, the first magnetic shielding member 171 and / or the second magnetic shielding member 172 may also be provided, for example, in the form of a thin sheet material or a coating.

[0137] In some embodiments, the first magnetic shielding member 171 and / or the second magnetic shielding member 172 may include, for example, ferrite; ferrite may represent a magnetic body based on magnetic metal oxides including magnetic body ceramics, and generally ferrite may include oxides or composite oxides of ferromagnetic metals. The first magnetic shielding member 171 and / or the second magnetic shielding member 172 including ferrite material may have high electrical conductivity and high magnetic permeability. Or in still other embodiments, the first magnetic shielding member 171 and / or the second magnetic shielding member 172 may also employ a highly permeable alloy with strong magnetism such as an iron-based alloy, which may correspond to being included in the first magnetic shielding member 171 and / or the second magnetic shielding member 172.

[0138] Or in still other embodiments, the first magnetic shielding member 171 and / or the second magnetic shielding member 172 has a laminated structure or a multi-layer structure. For example, the first magnetic shielding member 171 and / or the second magnetic shielding member 172 may at least include: a functional layer for magnetic shielding and a flexible support layer. Among them, the functional layer for magnetic shielding may be prepared from the above ferrite material or highly permeable alloy to provide magnetic shielding; the flexible support layer may include polyethylene terephthalate (PET) or polyimide (PI) to provide buffering for assembly and extrusion to reduce cracking or powdering of the functional layer for magnetic shielding.

[0139] Alternatively, in some other embodiments, the first magnetic shielding member 171 and / or the second magnetic shielding member 172 may further include an adhesive layer combined with a functional layer or a flexible support layer for magnetic shielding, so as to assemble and fix the first magnetic shielding member 171 and / or the second magnetic shielding member 172 by adhesion; for example, the first magnetic shielding member 171 is adhered to the second side of the planar spiral coil 300, or the second magnetic shielding member 172 is adhered to the outside of the annular flange 161 of the second bracket 160. The material of the adhesive layer is, for example, at least one of epoxy resin, parylene polymer or parylene polymer, etc.

[0140] In some embodiments, the first magnetic shielding member 171 is substantially square or circular in sheet shape. The area of the first magnetic shielding member 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 about 5 - 10 mm; correspondingly, the area of the first magnetic shielding member 171 is 50 mm 2 ~200 mm 2 .

[0141] In some embodiments, the first magnetic shielding member 171 and / or the second magnetic shielding member 172 has a thickness of about 0.2 - 2.0 mm. The first magnetic shielding member 171 and / or the second magnetic shielding member 172 is configured in the form of a thin film.

[0142] In the above embodiments, the second bracket 160 is made of conventional materials such as polymers and ceramics. Alternatively, in some other embodiments, the second bracket 160 includes a ferrite material, a magnetic alloy, etc. The second bracket 160 is used to minimize the reduction of the magnetic field on the second side of the planar spiral coil 300, so that the magnetic field generated by the planar spiral coil 300 is concentrated or distorted towards the first side and / or the receiving cavity. Then in this embodiment, while accommodating and supporting the planar spiral coil 300, the second bracket 160 can also provide magnetic flux concentration, which is beneficial for omitting the first magnetic shielding member 171 and the second magnetic shielding member 172.

[0143] Or Figure 7 The schematic diagram of an aerosol - generating article 200a showing another embodiment is presented; in this embodiment, the aerosol - generating article 200a includes:

[0144] A sheet - shaped support layer 230a having a plurality of cavities or holes 211a arranged discretely or in an array;

[0145] A plurality of substrates 210a arranged discretely or in an array within the cavities or holes 211a of the support layer 230a; each of the plurality of substrates 210a is respectively arranged in one of the cavities or holes 211a of the plurality of cavities or holes 211a of the support layer 230a;

[0146] An aerosol - generating substrate 220a, comprising a plurality of substrate units; the plurality of substrate units are respectively located within a plurality of cavities or pores 211a and are in thermal conduction or contact with a substrate 210a. Each of the plurality of substrate units is combined with one of the plurality of substrates 210a respectively.

[0147] In Figure 7 In the illustrated embodiment, the support layer 230a is mainly used to support the substrate 210a and the aerosol - generating substrate 220a. In some embodiments, the support layer 230a comprises or is paper; for example, the support layer 230a comprises fiber paper prepared from wood fibers, hemp fibers, flax fibers, bamboo fibers, etc. Or in some other alternative embodiments, the support layer 230a can be made of materials such as metal, ceramic, glass, and plastic. The support layer 230a is insulating. The support layer 230a is a material with a low thermal conductivity and a low mass heat capacity, such as zirconia, glass, PEEK (polyetheretherketone), etc., and its long - term heat resistance needs to be not less than 250 °C.

[0148] In Figure 7 In the illustrated embodiment, the substrate 210a is made of a susceptive metal or alloy; when the aerosol - generating article 200a is received within the heating device 100, the plurality of substrates 210a are respectively opposite to a plurality of planar spiral coils 300 to form an inductive coupling. Thus, in use, a magnetic field can be generated by the planar spiral coils 300 to induce the opposite substrates 210a to heat up, and then the substrates 210a heat the substrate units of the aerosol - generating substrate 220a that are in thermal conduction or contact with them. The substrate 210a mainly comprises aluminum, nickel, and ferromagnetic materials, such as iron - based alloys, nickel - based alloys, stainless - steel series such as 420 stainless steel or 430 stainless steel, graphite, carbon, etc. Or, 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.

[0149] Or Figure 8 A schematic diagram of a heating device showing another embodiment is presented; in this embodiment, the heating device comprises:

[0150] A plurality of planar spiral coils 300a, for generating a magnetic field to induce heating of parts of the opposite substrates 210 or the substrate units of the aerosol - generating substrate 220 / 200a by the substrates 210a;

[0151] A bracket 160a, at least partially located on a second side of the plurality of planar spiral coils 300a; and accommodating and supporting the plurality of planar spiral coils 300a on the second side of the planar spiral coils 300a. A plurality of annular ridges 161a are arranged on the bracket 160a, and the plurality of planar spiral coils 300a are respectively accommodated and held within the plurality of annular ridges 161a.

[0152] In Figure 8In the heating device shown, it further includes:

[0153] A magnetic shielding member 170a, which is configured to be in a concave shape. The magnetic shielding member 170a includes:

[0154] A first part 171a, located on a second side of the planar spiral coil 300a to minimize the generated magnetic field outside the planar spiral coil 300a;

[0155] A second part 172a, formed by extending from the first part 171a; the second part 172a is in an annular shape and circumferentially surrounds the planar spiral coil 300a to provide magnetic field shielding on the circumferential outer side of the planar spiral coil 300a.

[0156] In this embodiment, the first part 171a and the second part 172a of the magnetic shielding member 170a are connected or integral. For example, in some embodiments, the magnetic shielding member 170a can be a coating formed by spraying or depositing the above ferrite material within the annular convex edge 161a, or a magnetic shielding film pasted within the annular convex edge 161a, so that the first part 171a and the second part 172a are connected or integral.

[0157] It should be noted that the description and drawings of the present application give preferred embodiments of the present application, but are not limited to the embodiments described in this specification. Further, for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present 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 changing magnetic field and generate heat, thereby heating the aerosol-generating substrate. A reusable heating device, including: At least one magnetic field generator, which is basically 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 changing 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 changing magnetic field generated by the magnetic field generator towards the first side of the magnetic field generator during use.

2. The aerosol generating system according to claim 1, wherein 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, characterized in that, 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 basically 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 rib, 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 by one in a predetermined order to sequentially generate a changing 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 - forming article that is substantially sheet - shaped to generate an aerosol; characterized in that, The heating device includes: 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 capable of generating 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 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 during use.

18. A heating device configured to heat an aerosol - forming article that is substantially sheet - shaped to generate an aerosol; characterized in that, The heating device includes: 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 capable of generating a changing magnetic field penetrating the receiving cavity, and the magnetic field generator is substantially arranged 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.

Images