WO2025161885A1 - Aerosol generating system, aerosol generating product, and heating device - Google Patents

Abstract

Provided in the present application are an aerosol generating system, an aerosol generating product, and a heating device. The aerosol generating system comprises: a replaceable aerosol generating product, which comprises a substantially planar substrate and an aerosol generating matrix, wherein the substrate is configured to be in the shape of a mesh with several openings, and can be penetrated by a variable magnetic field to generate heat so as to heat the aerosol generating matrix to generate an aerosol; and a reusable heating device, which comprises a receiving chamber for receiving the aerosol generating product, and at least one planar spiral coil, wherein when the aerosol generating product is received in the receiving chamber, the planar spiral coil is arranged substantially parallel to and spaced apart from the substrate, and the planar spiral coil is configured to generate the variable magnetic field penetrating the substrate. The aerosol generating system is beneficial for more uniform formation and distribution of heat on the substrate during magnetic hysteresis heating.

Description

Aerosol generating system, aerosol generating product and heating device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application number 202410161235.2, filed with the Patent Office of China on February 4, 2024, entitled “Aerosol Generating System, Aerosol Generating Product and Heating Device,” the entire contents of which are incorporated herein by reference.

Technical Field

The embodiments of the present application relate to the technical field of heat-not-burn aerosol generation technology, and in particular to an aerosol generating system, an aerosol generating product, and a heating device.

Background Art

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.

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.

Application Contents

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

A replaceable aerosol-generating article comprises a substantially planar substrate and an aerosol-generating substrate; the substrate is configured to be penetrated by a changing magnetic field to generate heat, thereby heating the aerosol-generating substrate to generate an aerosol; the substrate is configured to be in the shape of a mesh having a plurality of meshes;

Reusable heating device, comprising:

a receiving chamber for receiving the aerosol-generating article;

at least one planar spiral coil; when the aerosol-generating article is received in the receiving cavity, the planar spiral coil is arranged substantially parallel to and spaced apart from the substrate, and the planar spiral coil is configured to generate a changing magnetic field that penetrates the substrate.

In some embodiments, when the aerosol-generating article is received in the receiving cavity, the spacing between the planar spiral coil and the substrate is less than 15 mm.

In some embodiments, the diameter of the mesh holes on the substrate is between 0.5 and 2 mm.

In some embodiments, the ratio of the total area of the meshes on the substrate to the area of the substrate is greater than 30%.

In some embodiments, the ratio of the total area of the meshes on the substrate to the area of the substrate is between 50% and 70%.

In some embodiments, when the aerosol-generating article is received in the receiving cavity, a projection of the substrate within the plane of the planar spiral coil is substantially entirely located within the planar spiral coil.

In some embodiments, the area of the substrate is smaller than the area of the planar spiral coil.

In some embodiments, the aerosol-generating article comprises a plurality of said substrates;

The heating device comprises a plurality of planar spiral coils; when the aerosol-generating article is received in the receiving chamber, each of the plurality of substrates is opposite to each of the plurality of planar spiral coils, so that each of the plurality of substrates can be penetrated by the magnetic field generated by the corresponding planar spiral coil and generate heat;

The heating device is configured to control the plurality of planar spiral coils to sequentially generate a changing magnetic field one after another in a predetermined order, so as to enable one of the substrates to heat the aerosol-generating substrate individually each time to generate an aerosol sufficient for one inhalation.

In some embodiments, the planar helical coil is substantially circular; and the base is substantially square.

In some embodiments, the ratio of the area of the substrate to the area of the planar spiral coil is between 0.3 and 0.7.

Yet another embodiment of the present application provides an aerosol-generating article, wherein the aerosol-generating article is configured to be substantially sheet-like or planar; the aerosol-generating article comprises:

At least one planar substrate capable of being penetrated by a changing magnetic field to generate heat; the substrate being constructed in a mesh shape having a plurality of meshes;

An aerosol-generating substrate is bonded to the base and can be heated to generate an aerosol.

Yet another embodiment of the present application further provides an aerosol generating system, comprising:

A replaceable aerosol-generating article comprising a substantially planar base and an aerosol-generating substrate; the base is configured to be penetrated by a changing magnetic field to generate heat, thereby heating the aerosol-generating substrate to generate an aerosol; the base is configured to be annular;

Reusable heating device, comprising:

a receiving chamber for receiving the aerosol-generating article;

A planar spiral coil is arranged in a ring shape; when the aerosol-generating article is received in the receiving cavity, the axis of the planar spiral coil is arranged to substantially coincide with the axis of the substrate, and the planar spiral coil is configured to generate a changing magnetic field that penetrates the substrate.

In some embodiments, the outer diameter of the substrate is smaller than or equal to the outer diameter of the planar spiral coil, and the inner diameter of the substrate is smaller than or equal to the inner diameter of the planar spiral coil.

In some embodiments, a ratio of an area of the substrate to an area of the planar spiral coil is between 0.8 and 1.0.

Yet another embodiment of the present application provides an aerosol-generating article, wherein the aerosol-generating article is configured to be substantially sheet-like or planar; the aerosol-generating article comprises:

A plurality of substantially planar substrates capable of being penetrated by a changing magnetic field to generate heat; the substrates are configured to be annular with a central hole;

The aerosol-generating substrate comprises a plurality of substrate units; each of the plurality of substrate units is respectively located on each of the plurality of bases and can be heated to generate an aerosol.

Yet another embodiment of the present application provides a heating device for heating a substantially sheet-shaped aerosol-generating article to generate an aerosol; the heating device comprises:

a receiving chamber for receiving the aerosol-generating article;

a substantially planar substrate adjacent to the receiving cavity or at least partially defining the boundary of the receiving cavity; the substrate being constructed in the shape of a mesh having a plurality of meshes and configured to be penetrated by the varying magnetic field to generate heat and thereby heat the aerosol-generating article received in the receiving cavity to generate an aerosol;

At least one planar spiral coil is arranged substantially parallel to and spaced apart from the substrate, and the planar spiral coil is configured to generate a varying magnetic field penetrating the substrate.

The above aerosol generating system is advantageous for forming and distributing heat on the substrate more uniformly during hysteresis heating.

BRIEF DESCRIPTION OF THE DRAWINGS

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.

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

FIG2 is a schematic diagram of the aerosol generating article being removed or replaced after the door cover of the heating device in FIG1 is opened;

FIG3 is an exploded schematic diagram of the aerosol generating article in FIG2 from one perspective;

FIG4 is an exploded schematic diagram of the heating device in FIG2 from one perspective;

FIG5 is a cross-sectional schematic diagram of the aerosol generating system in FIG1 from one perspective;

FIG6 is a cross-sectional schematic diagram of the aerosol generating system in FIG1 from another perspective;

FIG7 is a structural schematic diagram of the substrate in FIG4 from another perspective;

FIG8 is a schematic structural diagram of the substrate and the planar spiral coil in FIG4 from another perspective;

FIG9 is a graph showing a temperature rise test of substrates with different opening areas in one embodiment;

FIG10 is a schematic diagram of a coupling state between a substrate of an aerosol-generating article and a planar spiral coil of a heating device of an aerosol-generating system according to yet another embodiment;

FIG11 is a structural schematic diagram of the coupling state of the substrate and the planar spiral coil in FIG10 from another perspective.

DETAILED DESCRIPTION

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 implementation methods.

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.

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.

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:

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.

In the embodiment shown in Figures 1 and 2, the heating device 100 includes several components disposed within an outer shell (which may be referred to as a housing). The overall design of the housing may vary, and the type or configuration of the housing, which may define the overall size and shape of the heating device 100, may vary. Typically, the elongated body may be formed from a single, integral housing, or the longitudinally elongated housing may be formed from two or more separable bodies. 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, ceramic, and the like. In the embodiment shown in Figures 1 and 2, the heating device 100 is substantially flat; the longitudinal length of the heating device 100 is greater than its width, and the width is greater than its thickness.

In some embodiments, the housing of the heating device 100 substantially defines the outer surface of the heating device 100. In the embodiment shown in Figures 1 and 2, the heating device 100 includes:

The housing may include one or more reusable components; the housing has a proximal end 110 and a distal end 120 opposite to each other in the longitudinal direction, a first side 130 and a second side 140 opposite to each other in the width direction, and a front side 150 and a rear side 160 opposite to each other in the thickness direction.

During use, the proximal end 110 is configured as the end through which the user inhales the aerosol, and is provided with a mouthpiece 111 for the user to inhale; while the distal end 120 is the end away from the user. The distal end 120 is provided with a charging port 121; the charging port 121 is used to charge the heating device 100 and/or the battery cell 10 within the heating device 100. In some embodiments, the charging port 121 is a USB Type-C port; or in other variations, the charging port 121 can also be a USB 2.0, USB 3.0, or USB 4-pin port.

In some embodiments, the nozzle piece 111 and the housing/second shell 180 are separately prepared and assembled; the nozzle piece 111 and the housing are detachably connected; thus, during use, the nozzle piece 111 can be detached or removed from the housing; and a sealing ring, such as an O-ring, can be used to form an airtight seal therebetween. Alternatively, in other embodiments, the nozzle piece 111 and the housing/second shell 180 are integrally molded from a moldable material and are not detachable or separable from each other.

In use, the front side 150 is the side where the door cover 190 is opened by a user to receive or remove the aerosol-generating article 200 ; the rear side 160 is the side where the magnetic field generator 30 is arranged.

As shown in FIG1 and FIG2 , the housing of the heating device 100 includes:

The first shell 170 and the second shell 180 ; the first shell 170 is close to or defines the front side 150 , and the second shell 180 is close to or defines the rear side 160 .

In the embodiments of Figures 1 and 2, the heating device 100 and/or the outer shell of the heating device 100 is in a longitudinal cylindrical shape; and in the embodiments, the length of the heating device 100 and/or the outer shell of the heating device 100 is greater than the width, and the width is greater than the thickness, thereby making the heating device 100 and/or the outer shell of the heating device 100 configured to be flat.

In some embodiments, the length dimension of the heating device 100 and/or the shell of the heating device 100 is between 60 and 160 mm; and the width dimension of the heating device 100 and/or the shell of the heating device 100 is between 22 and 50 mm; and the thickness dimension of the heating device 100 and/or the shell of the heating device 100 is between 5 and 20 mm.

2 , the aerosol-generating article 200 is generally configured in the shape of a sheet or flake; a sheet or flake can be characterized as the aerosol-generating article 200 having a length greater than or equal to a width, and a width at least three times or at least five times greater than a thickness.

Accordingly, the heating device 100 comprises:

A receiving cavity 510 is located within the housing; the receiving cavity 510 is substantially adapted to the shape of the aerosol-generating article 200 for receiving the aerosol-generating article 200. In some embodiments, the length of the receiving cavity 510 is greater than or equal to the width, and the width is greater than the thickness; and the receiving cavity 510 is arranged in a plane parallel to the longitudinal direction and the width direction of the heating device 100.

1 and 2 , the receiving cavity 510 defines an opening 171 on the front side 150 of the housing. In an embodiment, the opening 171 is formed or defined by the first shell 170 of the housing. In use, the aerosol-generating article 200 can be removably received in or removed from the receiving cavity 510 through the opening 171.

As shown in FIG1 and FIG2 , the heating device 100 further includes:

The movable door cover 190 is movably coupled to the outer shell of the heating device 100 and can move relative to the outer shell to selectively move between an open position and a closed position; when the door cover 190 is in the open position, the opening 171 is opened to enable the user to removably receive the aerosol generating product 200 in the receiving chamber 510 or remove it; when the door cover 190 is in the closed position, the opening 171 is blocked and closed to prevent the user from removably receiving the aerosol generating product 200 in the receiving chamber 510 or removing it.

As shown in Figures 1, 2, and 4, the second housing 180 of the housing is provided with a longitudinally arranged pin 181 on the first side 130. A door cover 190 is hingedly connected to the housing via the pin 181 and can rotate about the pin 181, as indicated by arrow R1 in Figure 2. Furthermore, the door cover 190 can be selectively configured between an open position and a closed position by rotation, thereby selectively opening or closing the opening 171. Alternatively, in other alternative embodiments, the pin 181 can be disposed on the second side 140 of the housing; the door cover 190 is pivotally connected to the housing at the second side 140. Alternatively, in other alternative embodiments, the pin 181 can be located on the door cover 190.

Or in some other variant embodiments, the door cover 190 is attached to the surface of the front side 150 of the first shell 170 and can move linearly relative to the first shell 170 in the longitudinal direction; and then selectively configured between the open position and the closed position during the movement, thereby selectively opening or closing the opening 171.

2 and 3 , the aerosol-generating article 200 includes a first end 210 and a second end 220 that are opposite to each other along the length direction. Furthermore, the aerosol-generating article 200 includes:

A first air inlet 251 and a second air inlet 252 isolated from each other are formed or defined at the second end 220;

A first air outlet 261 and a second air outlet 262 isolated from each other are formed or defined at the first end 210;

A first air channel R21 extends from the first air inlet 251 to the first air outlet 261, and a second air channel R22 extends from the second air inlet 252 to the second air outlet 262. The first air channel R21 and/or the second air channel R22 are arranged to extend along the length direction of the aerosol-generating article 200. The first air channel R21 and the second air channel R22 are isolated from each other. The first air channel R21 and/or the second air channel R22 extend straight.

As shown in Figures 2 and 3, the aerosol generating article 200 includes:

The outer body 230, which defines an enclosed volume, is rigid and is bounded by a cover plate 231 and a tray 232. Specifically, the cover plate 231 and the tray 232 are combined along the thickness direction of the aerosol-generating article 200 to form or define the outer body 230 of the aerosol-generating article 200. The tray 232 is provided with at least one or more discrete or arrayed cavities. Specifically, the cavities include at least one or more first cavities 271 spaced apart in the longitudinal direction and at least one or more second cavities 272 spaced apart in the longitudinal direction. At least one or more first cavities 271 are arranged along the first air passage R21, and at least one or more second cavities 272 are arranged along the second air passage R22.

In some embodiments, the cover plate 231 and the tray 232 are securely connected by means of an interference fit or a tight fit. In some embodiments, a separating flange 235 is disposed on the cover plate 231 and/or the tray 232, extending longitudinally from the first end 210 to the second end 220. When the cover plate 231 and the tray 232 are coupled together, the separating flange 235 separates the first air channel R21 from the second air channel R22. In some embodiments, the first air channel R21 and/or the first air inlet 251 and/or the first air outlet 261 are disposed on one side of the separating flange 235, while the second air channel R22 and/or the second air inlet 252 and/or the second air outlet 262 are disposed on the other side of the separating flange 235.

Multiple substrates 241 and aerosol-generating matrices 242 formed or bonded to each of the substrates 241 are arranged between the cover 231 and the tray 232. The substrates 241 are penetrated by the changing magnetic field, generating heat that in turn heats the aerosol-generating matrices 242 bonded thereto, generating aerosol. The aerosol-generating matrices 242 are solid or gel-like sheets or blocks.

In some embodiments, the substrate 241 is sheet-shaped. The substrate 241 has a thickness of approximately 0.03 to 1.0 mm. In a more preferred embodiment, the substrate 241 has a thickness of approximately 0.03 to 0.2 mm. In some specific embodiments, the substrate 241 has a thickness of 0.26 mm.

In some embodiments, the aerosol-generating substrate 242 is a continuous thin layer disposed on the substrate 241; for example, the aerosol-generating substrate 242 substantially completely covers at least one side surface of the substrate 241. Alternatively, in other embodiments, the aerosol-generating substrate 242 is formed on both sides of the substrate 241.

In some embodiments, aerosol-generating substrate 242 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 form an aerosol by heating aerosol-generating substrate 242. In some typical embodiments, aerosol-generating substrate 242 is or can include a solid or gel at room temperature.

In some embodiments, the aerosol-generating substrate 242 may include one or more of powder, particles, shredded strips, ribbons, or flakes of one or more of herb leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; or, the solid aerosol-generating substrate 242 may contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

In some embodiments, the aerosol-generating substrate 242 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 one 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 one 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.

In some optional embodiments, the aerosol-generating substrate 242 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 242 upon heating.

In some optional embodiments, the aerosol-generating substrate 242 further includes 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 includes at least one of glycerin, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and the like.

In some optional embodiments, the aerosol generating matrix 242 further includes: an adhesive; the adhesive promotes the bonding of the components in the aerosol generating matrix 242 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.

In some optional embodiments, the aerosol-generating substrate 242 further comprises reinforcing fibers. The reinforcing fibers generally have a higher fiber strength than the tobacco plant fibers in the active substrate, thereby enhancing the strength and plasticity of the aerosol-generating substrate 242 during use. For example, in some specific embodiments, the reinforcing fibers include at least one of softwood fibers, hardwood fibers, hemp fibers or flax fibers, and bamboo fibers.

In a specific embodiment, the aerosol-generating matrix 242 includes: 65-90 wt% of active substrate, 3-10 wt% of reinforcing fiber, 0-5 wt% of adhesive, 5-15 wt% of flavor, and 10-20 wt% of aerosol former or smoke generator.

Or in another specific embodiment, the aerosol generating matrix 242 includes: 65-90 wt% of active substrate, 3-10 wt% of reinforcing fiber, 1-5 wt% of adhesive, 5-15 wt% of flavor, and 15-40 wt% of aerosol former or smoke generator.

In some embodiments, the aerosol-generating substrate 242 has an areal density of 20 to 150 g/m ² .

In some embodiments, the thickness of the aerosol-generating substrate 242 is 0.1 to 0.6 mm. In some embodiments, the thickness of the aerosol-generating substrate 242 is greater than the thickness of the base 241 .

In some embodiments, the water content of the aerosol-generating substrate 242 is 6-14 wt %.

In some embodiments, aerosol-generating substrate 242 may include multiple sublayers. For example, in some optional embodiments, aerosol-generating substrate 242 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, while the second sublayer primarily includes a flavoring. 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.

Alternatively, in some embodiments, the aerosol-generating substrate 242 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, and the second sublayer may include a flavoring agent and 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 0-20 wt% of flavoring agents, 80-100 wt% of adhesives, 0-0.2 wt% of moisture barrier agents, 0-0.5 wt% of mildew inhibitors, and 0-0.5 wt% of antimicrobial agents.

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.

In some other embodiments, the thickness of the second sublayer of the aerosol generating matrix 242 is 0.001 to 0.1 mm; during preparation, the second sublayer is coated on the substrate 241 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 242.

Alternatively, in yet other variations, the aerosol-generating substrate 242 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 that, at rest, has a dynamic viscosity greater than 1 Pa·s, 5 Pa·s, or 10 Pa·s.

In one embodiment, a recognizable marking is disposed on the aerosol-generating substrate 242 and/or the base 241. 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.

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.

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 242, such as peach, mint, or orange.

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 242 , such as the nicotine content.

In the embodiments shown in Figures 2 and 3, substrate 241 is rigid or hard. In some embodiments, substrate 241 is made of a receptive metal or alloy; thus, during use, substrate 241 can be heated by electromagnetic induction or by being penetrated by a changing magnetic field, which in turn heats aerosol-generating matrix 242 to produce an aerosol. In some specific embodiments, the receptive metal or alloy used to prepare or form substrate 241 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 241 comprises permalloy with an alloy grade of 1J50 or 1J85; for example, the mass percentage of iron in permalloy substrate 241 is between 15% and 85% by weight, and the mass percentage of nickel does not exceed 85% by weight.

Specifically, as shown in FIG. 2 and FIG. 3 , the plurality of substrates 241 are accommodated and held in the plurality of first cavities 271 and the plurality of second cavities 272 .

The multiple aerosol-generating substrates 242 located in the first concave cavity 271 are exposed to or located in the first air channel R21, and the aerosols generated can be output from the first air channel R21 to the first air outlet 261; and the multiple aerosol-generating substrates 242 located in the second concave cavity 272 are exposed to or located in the second air channel R22, and the aerosols generated can be output from the second air channel R22 to the second air outlet 262.

In some embodiments, the cover plate 231 and/or the tray 232 are made of a material with low thermal conductivity and low mass heat capacity, such as zirconium oxide, glass, or PEEK (polyetheretherketone), and their long-term temperature resistance needs to be no less than 250° C. Alternatively, in some alternative embodiments, the cover plate 231 and/or the tray 232 include or are made of paper; for example, the cover plate 231 and/or the tray 232 include fiber paper made from wood fiber, hemp fiber, flax fiber, bamboo fiber, or the like.

In some embodiments, the matrix 241 may be in the form of a dense sheet.

As shown in FIG4 to FIG6 , the heating device 100 further includes:

The battery core 10 is arranged between the receiving cavity 510 and the distal end 120 in the longitudinal direction to supply power to the heating device 100 and/or the magnetic field generator 30;

The charging circuit board 23 is located between the battery cell 10 and the distal end 120 ; a charging IC (i.e., a charging management chip) is arranged on the charging circuit board 23 to control the charging of the battery cell 10 through the charging interface 121 ;

The main circuit board 20 integrates or arranges a control circuit or MCU controller; the main circuit board 20 includes a first portion 21 and a second portion 22 arranged in the longitudinal direction; at least a portion of the second portion 22 is located between the battery cell 10 and the rear side 160; the first portion 21 is at least partially located between the receiving cavity 510 and/or the magnetic field generator 30 and the rear side 160.

In some embodiments, the charging circuit board 23 is connected to the second portion 22 of the main circuit board 20 via conductive leads or laminated conductive traces, etc. Also, the battery cell 10 abuts against and is connected to the second portion 22 of the main circuit board 20 .

The first portion 21 of the main circuit board 20 is equipped with an MCU controller, etc., for controlling the power supply to the magnetic field generator 30. Alternatively, the first portion 21 of the main circuit board 20 is used to control the power supply to the magnetic field generator 30. Specifically, for example, the magnetic field generator 30 includes or is a planar spiral coil 30. The first portion 21 of the main circuit board 20 is equipped with at least one inverter circuit for converting the direct current output by the battery cell 10 into an alternating current that is provided to the at least one planar spiral coil 30, thereby causing the planar spiral coil 30 to generate a varying magnetic field. In some embodiments, the at least one inverter circuit includes at least one capacitor. The at least one capacitor is operable to form an LC oscillator with the at least one planar spiral coil 30. The oscillation of the LC oscillator generates the alternating current that is provided to the at least one planar spiral coil 30.

As shown in FIG. 2 to FIG. 6 , the heating device 100 further includes:

The first support 50 at least partially defines a receiving cavity 510 for receiving and accommodating the aerosol-generating article 200. At least a portion of the first support 50 is disposed between the planar spiral coil 30 and the front side 150. The first support 50 is at least partially concave in shape, surrounding and defining the receiving cavity 510. In some embodiments, the first support 50 is made of a non-receptive rigid material; for example, the first support 50 is made of a polymer plastic or ceramic.

As shown in FIG. 2 to FIG. 6 , the suction nozzle 111 is hollow; the suction nozzle 111 has an air inlet 113 at the proximal end 110 ; and an air outlet channel 112 is arranged inside the suction nozzle 111 .

The air outlet channel 112 is in airflow communication with the receiving chamber 510 through a first air outlet opening 513 and a second air outlet opening 514 arranged on the bracket 50, thereby outputting the aerosol to the inhalation port 113, as indicated by arrow R30 in Figure 5. The first air outlet opening 513 and the second air outlet opening 514 are arranged on the side of the receiving chamber 510 facing the proximal end 110.

As shown in Figures 2 to 6, the first bracket 50 is further provided with a first air inlet 515 and a second air inlet 516 on the other side of the distal end 120, for supplying air into the receiving cavity 510 during suction. As shown in Figures 2 to 5, the first side 130 of the housing is provided with a first air inlet 131 for supplying external air during suction; the second side 140 of the housing is provided with a second air inlet 141. The first bracket 50 also has an extension portion 52 extending toward the distal end 120 and/or the battery cell 10. In an embodiment, the extension portion 52 is located between the receiving cavity 510 and the battery cell 10. In an embodiment, the extension portion 52 is hollow and has at least one cavity therein.

As shown in FIG. 2 to FIG. 6 , the extension portion 52 of the first bracket 50 is further provided with:

A first air intake passage R11 extending from the first air intake port 131 to the first air intake communication port 515;

The second air intake passage R12 extends from the second air intake port 141 to the second air intake communication port 516 .

5 and 6 , when the aerosol-generating article 200 is received in the receiving cavity 510 of the first holder 50, the first air inlet 251 of the second end 220 of the aerosol-generating article 200 is aligned with and in airflow communication with the first air inlet opening 515; and the second air inlet 252 of the second end 220 of the aerosol-generating article 200 is aligned with and in airflow communication with the second air inlet opening 515. Furthermore, as shown in FIG5 , when the aerosol-generating article 200 is received in the receiving cavity 510 of the first holder 50, the first air outlet 261 of the first end 210 of the aerosol-generating article 200 is aligned with and in airflow communication with the first air outlet opening 513; and the second air outlet 262 of the first end 210 of the aerosol-generating article 200 is aligned with and in airflow communication with the second air outlet opening 514.

Furthermore, in use, the first air inlet channel R11 of the first support 50, the first air channel R21 of the aerosol-generating article 200, and the air outlet channel 112 within the mouthpiece 111 collectively define a first airflow channel extending from the first air inlet 131 to the inhalation port 113. Furthermore, the first airflow channel passes through the aerosol-generating article 200, thereby delivering aerosol generated by the plurality of aerosol-generating substrates 242 located in the first airflow channel to the inhalation port 113. Furthermore, in use, the second air inlet channel R12 of the first support 50, the second air channel R22 of the aerosol-generating article 200, and the air outlet channel 112 within the mouthpiece 111 collectively define a second airflow channel extending from the second air inlet 141 to the inhalation port 113. Furthermore, the second airflow channel passes through the aerosol-generating article 200, thereby delivering aerosol generated by the plurality of aerosol-generating substrates 242 located in the first airflow channel to the inhalation port 113.

In some embodiments, the first air flow channel is isolated from the second air channel R22 of the aerosol-generating article 200 ; and the second air flow channel is isolated from the first air channel R21 of the aerosol-generating article 200 .

As for the connection and communication structure between the various portions of the first airflow channel and/or the second airflow channel, the extension portion 52 of the first bracket 50 is provided with a first joint 521 extending along the width direction toward the first side 130, and a second joint 522 extending along the width direction toward the second side 140. The first joint 521 is used to connect the first air inlet channel R11 with the first air inlet port 131; the second joint 522 is used to connect the second air inlet channel R12 with the second air inlet port 141.

As shown in FIG. 4 to FIG. 6 , a partition wall 53 is further arranged in the extension portion 52 , extending toward and terminating at the end 530 , for isolating the first air intake passage R11 from the second air intake passage R12 .

As shown in FIG. 2 to FIG. 6 , the heating device 100 further includes:

Second bracket 40 is used to accommodate and support planar spiral coil 30. Second bracket 40 is arranged near rear side 160; or second bracket 40 is located between planar spiral coil 30 and second housing 180. Specifically, after assembly, first bracket 50 and second bracket 40 accommodate and retain planar spiral coil 30 therebetween.

As shown in Figures 2 to 6 , the second bracket 40 is provided with an annular ridge 41 and an annular ridge 42 on its surface facing the front side 150 and/or the first bracket 50. The annular ridge 41 and the annular ridge 42 define at least one or more accommodating cavities 43. After assembly, the planar spiral coils 30 are accommodated and mounted within the cavities 43, each surrounded by the annular ridge 41. The annular ridge 41 also has several notches for the conductive leads of the planar spiral coils 30 to pass through the notches to the outside of the annular ridge 41, then pass through the second bracket 40 and connect to the main circuit board 20.

As shown in FIG4 to FIG6 , the heating device 100 further includes:

At least one or more magnetic field generators 30 are disposed between the receiving cavity 510 and the rear side 160; the at least one or more magnetic field generators 30 can be powered by the main circuit board 20. In the embodiments shown in Figures 4 to 7, the at least one or more magnetic field generators 30 are configured as electromagnetic induction heaters capable of generating a varying magnetic field to induce heating of the substrate 241 of the aerosol-generating article 200 through the magnetic field. When the aerosol-generating article 200 is received in the receiving cavity, the at least one or more magnetic field generators 30 induce heating of the aerosol-generating article 200 through the generated magnetic field.

Specifically, as shown in Figures 4 to 7, when the aerosol-generating article 200 is received in the receiving cavity 510, each of the multiple magnetic field generators 30 is respectively opposite to each of the aerosol-generating substrates 242 and/or the bases 241, so that each magnetic field generator 30 can heat the relative base 241.

In the embodiments shown in Figures 4 to 6 , the magnetic field generator 30 is substantially planar. In some embodiments, the magnetic field generator 30 comprises a planar spiral coil 30. Furthermore, the substrate 241 is planar. When the aerosol-generating article 200 is received in the receiving chamber, the magnetic field generator 30 is arranged substantially parallel to the substrate 241. In Figures 4 to 6 , the planar spiral coil 30 and/or the substrate 241 are circular in shape; alternatively, in other alternative embodiments, the planar spiral coil 30 and/or the substrate 241 are square, oval, or the like.

In some embodiments, when the aerosol-generating article 200 is received in the receiving chamber, the planar spiral coil 30 is arranged substantially parallel to the substrate 241. Furthermore, the spacing between the planar spiral coil 30 and the substrate 241 is less than 15 mm; more preferably, the spacing between the planar spiral coil 30 and the substrate 241 is less than 10 mm. In some embodiments, the spacing between the planar spiral coil 30 and the substrate 241 is less than the diameter of the planar spiral coil 30.

In some embodiments, at least one or more planar spiral coils 30 are arranged discretely or in an array.

In some embodiments, at least one or more planar spiral coils 30 can be independently connected to the first portion 21 of the main circuit board 20 and can be independently powered by the main circuit board 20. For example, in some embodiments, multiple planar spiral coils 30 are connected to the main circuit board 20, and the main circuit board 20 can independently supply alternating current to each of the planar spiral coils 30, causing each of the planar spiral coils 30 to independently generate magnetic fields, thereby independently initiating heating. For example, in some embodiments, several or more planar spiral coils 30 are independently activatable, allowing each planar spiral coil 30 to independently heat the substrate 241 facing the coil, thereby heating the aerosol-generating substrate 242 on the substrate 241 and generating aerosol. For another example, in some embodiments, the main circuit board 20 is configured to control the heating of the several or more planar spiral coils 30 to be sequentially activated in a predetermined order. In some embodiments, the main circuit board 20 is configured to control the heating of the several or more planar spiral coils 30 to be initiated at different times, such that, for example, during each puff by a user, the main circuit board 20 controls only one planar spiral coil 30 to activate heating to generate aerosol sufficient for a single puff. In some embodiments, during each puff, the main circuit board 20 controls one of the several planar spiral coils 30 to heat the aerosol generating article 200 separately, and the amount of total particulate matter (TPM) generated by one substrate 241 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, and about 5 mg to about 10 mg.

4 to 6 , the plurality of planar spiral coils 30 are substantially discretely arranged and substantially all located in the same plane.

In some embodiments, during multiple puffs by a user, the main circuit board 20 controls a predetermined sequence of the planar spiral coils 30, sequentially activating heating one after another. Specifically, for example, as shown in Figures 4 to 6 , during the user's first puff, the main circuit board 20 provides power to the first planar spiral coil 30 closest to the left (from top to bottom) for heating, thereby heating the opposing substrate 241 and aerosol-generating substrate 242 to generate aerosol for one puff. During the user's next puff, the main circuit board 20 provides power to the second planar spiral coil 30 closest to the left (from top to bottom) for heating, thereby heating the opposing substrate 241 and aerosol-generating substrate 242 to generate aerosol for one puff. This process continues in this order until all planar spiral coils 30 are heated and all aerosol-generating substrate 242 in the aerosol-generating article 200 is consumed, prompting the user to replace the aerosol-generating article 200. In the above embodiment, activating the planar spiral coils 30 individually in sequence rather than simultaneously for heating minimizes unnecessary consumption of the aerosol-generating substrate and reduces energy waste. Alternatively, in some other implementations, the order in which the planar spiral coils 30 are activated in a predetermined sequence is along the direction of the array arrangement.

Alternatively, in some alternative implementations, the main circuit board 20 controls the multiple planar spiral coils 30 to be individually activated sequentially, without interruption along the arrangement direction of the planar spiral coils 30. Alternatively, in some alternative implementations, the main circuit board 20 controls the multiple planar spiral coils 30 to be individually activated sequentially, with interruptions or in a skipped manner.

In some embodiments, several or more planar helical coils 30 can be energized sequentially, ie, once per user puff, to consistently generate aerosol on a puff-by-puff basis.

In some embodiments, the heating device 100 includes:

An airflow sensor (not shown), such as a microphone or MEMS sensor, is used to sense the user's puffing action. Based on the sensing results of the airflow sensor, the main circuit board 20 sequentially supplies energy to one or more planar spiral coils 30. In a preferred embodiment, the main circuit board 20 controls the sequential activation of the planar spiral coils 30 in a predetermined order, which is based on the user's puffing action. In other variants, the main circuit board 20 controls the sequential activation of the planar spiral coils 30 in accordance with a predetermined interval; for example, the predetermined interval is between approximately 30 seconds and 300 seconds.

In some embodiments, the main circuit board 20 controls the sequential activation of the plurality of planar spiral coils 30 in a predetermined order, based on the removal or replacement of the aerosol-generating article 200. Specifically, in some embodiments, after the main circuit board 20 controls the sequential activation of the planar spiral coils 30, 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.

Alternatively, 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 30 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.

In some embodiments, the main circuit board 20 controls the sequential activation of the planar spiral coils 30 in a cyclical manner. For example, in some embodiments, the cycle repeats a predetermined number of times, such as six times. Specifically, when the number of activations of the planar spiral coils 30 and/or the number of puffs taken by the user reaches a predetermined number, a new cycle begins, controlling the sequential activation of the planar spiral coils 30. For another example, in some embodiments, the cycle repeats according to the removal or replacement of the aerosol-generating article 200.

In some embodiments, the main circuit board 20 controls the planar spiral coils 30 to generate a magnetic field to induce heating of the opposing substrates 241 according to the same heating curve. For example, in some specific embodiments, the main circuit board 20 controls the generation of a magnetic field to induce heating of the opposing substrates 241 to a temperature of 300°C. Alternatively, in other variations, the main circuit board 20 controls the planar spiral coils 30 to induce heating of the opposing substrates 241 according to different heating curves or heating temperatures. For example, in some implementations, the main circuit board 20 controls the planar spiral coils 30 to induce the heating temperatures of the opposing substrates 241 to increase or decrease sequentially along the heating start sequence.

For example, in some embodiments, the main circuit board 20 is configured to sequentially supply power to the planar spiral coil 30 at a given power level, causing the opposing substrate 241 to reach an operating temperature within a predetermined time. For example, each time the main circuit board 20 supplies power to the planar spiral coil 30, the opposing substrate 241 reaches a temperature of at least 200°C, at least 300°C, or at least 400°C within 0.5 seconds, maintains the temperature for approximately 2.5 seconds, and then stops.

In some embodiments, the planar spiral coil 30 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 the planar spiral coil 30 has a circular cross-sectional shape; in other embodiments, the wire material used to wind the planar spiral coil 30 has a rectangular, oval, or triangular cross-sectional shape. In some embodiments, the wire material used to wind the planar spiral coil 30 is a Litz wire having multiple or multiple conductive filaments.

Alternatively, in some alternative embodiments, the planar spiral coil 30 is a track or line formed on a planar substrate by printing, depositing, or spraying a conductive paste. For example, in some specific embodiments, the planar spiral coil 30 is formed as a thin layer by printing, depositing, or spraying on a rigid or flexible electrically insulating substrate such as ceramic, glass, quartz, or PI film.

In some embodiments, when the aerosol-generating article 200 is received in the receiving cavity 510 , the base 241 is opposite to the planar spiral coil 30 . More preferably or precisely, the center of the base 241 is aligned with the center of the planar spiral coil 30 .

In some embodiments, the shape of base 241 is the same as the shape of planar spiral coil 30 .

In the embodiments shown in Figures 7 and 8, the area of the substrate 241 is smaller than that of the planar spiral coil 30. Specifically, in the embodiment shown in Figure 8, the ratio of the area of the substrate 241 to the area of the planar spiral coil 30 is between 0.3 and 0.7. Consequently, the projection of the substrate 241 within the plane of the planar spiral coil 30 is substantially entirely within the planar spiral coil 30. This lack of projection of the substrate 241 within the plane of the planar spiral coil 30 is beneficial for maximizing uniform magnetic field penetration of the substrate 241, thereby generating hysteresis heating. For example, in the embodiment shown in Figure 8, the diameter D1 of the planar spiral coil 30 is between 8 and 15 mm. The substrate 241 is configured in a substantially square shape. The length and/or width D2 of the substrate 241 is approximately 4 to 10 mm.

As shown in Figures 7 and 8, a plurality of mesh holes 2411 are arranged on the substrate 241, thereby making the substrate 2411 fluid-permeable. In some embodiments, the substrate 241 having the mesh holes 2411 is formed by mechanically punching, chemically etching, or laser drilling a dense sheet-like precursor; mechanical drilling methods include punching or drilling with a drill. The mesh-like substrate 241 is advantageous in that it allows for more uniform heat generation and distribution across the substrate 241 during hysteresis heating. In some embodiments, the diameter of the mesh holes 2411 ranges from 0.5 to 2 mm; more preferably, the diameter of the mesh holes 2411 ranges from 0.8 to 1.5 mm.

In some embodiments, the ratio of the area of the mesh 2411 on the substrate 241 to the area of the square substrate 241 is greater than 30%; in some specific embodiments, the ratio of the area of the mesh 2411 on the substrate 241 to the area of the substrate 241 is between 50% and 70%.

For example, Figure 9 shows a comparison of the heating curves of substrates 241 with mesh 2411 area ratios of 40%, 50%, and 60%, respectively, when subjected to induction heating using the same planar spiral coil 30 and the same constant power mode. Curve S1 in Figure 9 shows the heating curve when the mesh 2411 area ratio is 60%, curve S2 shows the heating curve when the mesh 2411 area ratio is 50%, and curve S3 shows the heating curve when the mesh 2411 area ratio is 40%. All of these curves can reach 300°C within 1.5 seconds. As shown in Figure 9, the larger the mesh 2411 area, the faster the substrate 241 heats up. When the mesh 2411 area ratio exceeds 50%, the substrate 241 can reach a temperature of nearly 500°C or above in approximately 2 seconds.

In some embodiments, the pore sizes and areas of the meshes 2411 on the plurality of substrates 241 within the aerosol-generating article 200 are the same.

In yet other optional embodiments, the pores 2411 on the plurality of substrates 241 within the aerosol-generating article 200 have varying pore sizes and/or areas. For example, in some specific embodiments, the pore sizes and/or areas of the pores 2411 on the plurality of substrates 241 gradually decrease as they approach the air outlet. This arrangement allows the substrates 241 further away from the first air outlet 261 and/or the second air outlet 262 to have a higher temperature or velocity, ensuring that the aerosols generated by the more distant aerosol-generating substrates 242 and the closer aerosol-generating substrates 242 have substantially the same temperature or taste when delivered to the first air outlet 261 and/or the second air outlet 262.

Alternatively, in some alternative embodiments, the mesh-shaped planar substrate 241 is integrated or disposed within the heating device 100; specifically, the mesh-shaped planar substrate 241 is adjacent to or partially defines the receiving cavity 510 and is inductively coupled to the planar spiral coil 30, thereby being penetrated by the magnetic field generated by the planar spiral coil 30 and generating heat. Furthermore, the aerosol-generating article 200 includes an aerosol-generating substrate 242. When the aerosol-generating article 200 is received within the receiving cavity 510, the aerosol-generating substrate 242 contacts or conducts heat to the mesh-shaped planar substrate 241, causing the substrate 241 to heat the aerosol-generating substrate 242 to generate an aerosol.

Alternatively, Figures 10 and 11 illustrate a planar spiral coil 30a and a substrate 241a of an aerosol-generating system in a coupled state, according to yet another embodiment. In this embodiment, the planar spiral coil 30a is annular with a central hole 31a. The substrate 241a is annular with a central hole 2412a. When the aerosol-generating article 200 is received in the receiving chamber 510, the axis of the inductively coupled substrate 241a and the axis of the planar spiral coil 30a are substantially aligned.

In some embodiments, the outer diameter D11 of the annular planar spiral coil 30a is between 8 and 15 mm; and the inner diameter D12 of the planar spiral coil 30a or the diameter D12 of the central hole 31a is between 2 and 6 mm.

The outer diameter D21 of the annular base 241a is slightly smaller than or equal to the outer diameter D11 of the planar spiral coil 30a; the outer diameter D21 of the annular base 241a is substantially similar to the outer diameter D11 of the planar spiral coil 30a. Furthermore, the inner diameter D22 of the annular base 241a is slightly larger than or equal to the inner diameter D12 of the planar spiral coil 30a; the inner diameter D22 of the annular base 241a is substantially similar to the inner diameter D12 of the planar spiral coil 30a. Specifically, the outer diameter D21 of the annular base 241a is between 7 and 14 mm, and the inner diameter D22 of the annular base 241a is between 3 and 7 mm. When the aerosol-generating article 200 is received in the receiving chamber 510, the projection of the substrate 241a within the plane of the planar spiral coil 30a is substantially entirely within the planar spiral coil 30a; no portion of the projection of the substrate 241a within the plane of the planar spiral coil 30a lies outside the planar spiral coil 30a. This arrangement of the substrate 241a and the planar spiral coil 30a is beneficial for reducing magnetic flux leakage and improving uniform heating of the substrate 241a. In this embodiment, the ratio of the area of the substrate 241a to the area of the planar spiral coil 30a is between 0.8 and 1.0.

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 (16)

An aerosol generating system, characterized by comprising: A replaceable aerosol-generating article comprising a substantially planar base and an aerosol-generating substrate; the base is configured to be meshed with a plurality of meshes and is configured to be penetrated by a varying magnetic field to generate heat and thereby heat the aerosol-generating substrate to generate aerosol; Reusable heating device, comprising: a receiving chamber for receiving the aerosol-generating article; at least one planar spiral coil; when the aerosol-generating article is received in the receiving cavity, the planar spiral coil is arranged substantially parallel to and spaced apart from the substrate, and the planar spiral coil is configured to generate a changing magnetic field that penetrates the substrate. The aerosol generating system of claim 1, wherein when the aerosol generating article is received in the receiving cavity, the spacing between the planar spiral coil and the substrate is less than 15 mm. The aerosol generating system according to claim 1 or 2, wherein the diameter of the mesh holes on the substrate is between 0.5 and 2 mm. The aerosol generating system according to claim 1 or 2, wherein the ratio of the total area of the mesh holes on the substrate to the area of the substrate is greater than 30%. The aerosol generating system according to claim 4, wherein the ratio of the total area of the mesh holes on the substrate to the area of the substrate is between 50% and 70%. The aerosol generating system according to claim 1 or 2, characterized in that when the aerosol generating article is received in the receiving cavity, the projection of the substrate in the plane of the planar spiral coil is substantially entirely located within the planar spiral coil. An aerosol generating system according to claim 1 or 2, characterized in that the area of the substrate is smaller than the area of the planar spiral coil. The aerosol generating system according to claim 1 or 2, wherein the aerosol generating article comprises a plurality of said substrates; The heating device comprises a plurality of planar spiral coils; when the aerosol-generating article is received in the receiving chamber, each of the plurality of substrates is opposite to each of the plurality of planar spiral coils, so that each of the plurality of substrates can be penetrated by the magnetic field generated by the corresponding planar spiral coil and generate heat; The heating device is configured to control the plurality of planar spiral coils to sequentially generate a changing magnetic field one after another in a predetermined order, so as to enable one of the substrates to heat the aerosol-generating substrate individually each time to generate an aerosol sufficient for one inhalation. An aerosol generating system according to claim 1 or 2, wherein the planar spiral coil is substantially circular; and wherein the base is substantially square. The aerosol generating system according to claim 9, wherein the ratio of the area of the substrate to the area of the planar spiral coil is between 0.3 and 0.7. An aerosol-generating article, characterized in that the aerosol-generating article is configured to be substantially sheet-like or planar; the aerosol-generating article comprises: At least one planar substrate is constructed in a mesh shape having a plurality of meshes and can be penetrated by a changing magnetic field to generate heat; An aerosol-generating substrate is bonded to the base and is capable of being heated to generate an aerosol. An aerosol generating system, characterized by comprising: A replaceable aerosol-generating article comprising a substantially planar base and an aerosol-generating substrate; the base is annular and configured to be penetrated by a varying magnetic field to generate heat, thereby heating the aerosol-generating substrate to generate aerosol; Reusable heating device, comprising: a receiving chamber for receiving the aerosol-generating article; A planar spiral coil is arranged in a ring shape; when the aerosol-generating article is received in the receiving cavity, the axis of the planar spiral coil is arranged to substantially coincide with the axis of the substrate, and the planar spiral coil is configured to generate a changing magnetic field that penetrates the substrate. The aerosol generating system according to claim 12, characterized in that the outer diameter of the substrate is less than or equal to the outer diameter of the planar spiral coil, and the inner diameter of the substrate is less than or equal to the inner diameter of the planar spiral coil. The aerosol generating system according to claim 12 or 13, wherein the ratio of the area of the substrate to the area of the planar spiral coil is between 0.8 and 1.0. An aerosol-generating article, characterized in that the aerosol-generating article is configured to be substantially sheet-like or planar; the aerosol-generating article comprises: A plurality of substantially planar substrates are configured in a ring shape with a central hole and can be penetrated by a changing magnetic field to generate heat; The aerosol-generating substrate comprises a plurality of substrate units; each of the plurality of substrate units is respectively located on each of the plurality of bases and can be heated to generate an aerosol. A heating device for heating a substantially sheet-shaped aerosol-generating article to generate an aerosol; characterized in that the heating device comprises: a receiving chamber for receiving the aerosol-generating article; a substantially planar substrate adjacent to the receiving cavity or at least partially defining the boundary of the receiving cavity; the substrate being constructed in the shape of a mesh having a plurality of meshes and configured to be penetrated by the varying magnetic field to generate heat and thereby heat the aerosol-generating article received in the receiving cavity to generate an aerosol; At least one planar spiral coil is arranged substantially parallel to and spaced apart from the substrate, and the planar spiral coil is configured to generate a varying magnetic field penetrating the substrate.