WO2025161929A1 - Aerosol generation system and heating apparatus - Google Patents

Abstract

The present application provides an aerosol generation system and a heating apparatus. The aerosol generation system comprises: a replaceable aerosol generation product, which can be heated to generate aerosol; and a heating apparatus, which can be repeatedly used and comprises: a receiving chamber, which is used for receiving the aerosol generation product; a first planar spiral coil and a second planar spiral coil, which are spaced apart and used for heating the aerosol generation product received in the receiving chamber; and a circuit, which is operably connected to the first planar spiral coil and the second planar spiral coil, so as to control the first planar spiral coil and the second planar spiral coil to simultaneously heat the aerosol generation product. In the aerosol generation system, the first planar spiral coil and the second planar spiral coil simultaneously heat the aerosol generation product, helping to accelerate or promote aerosol formation.

Description

Aerosol generating system and heating device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application number 202410160545.2, filed with the Patent Office of China on February 4, 2024, entitled “Aerosol Generating System 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, and in particular to an aerosol generation system 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 that can be heated to generate an aerosol;

Reusable heating device, comprising:

a receiving chamber for receiving the aerosol-generating article;

a first planar spiral coil and a second planar spiral coil arranged in a spaced relationship for heating the aerosol-generating article received in the receiving cavity;

Circuitry operatively connects the first planar spiral coil and the second planar spiral coil to control the first planar spiral coil and the second planar spiral coil to simultaneously heat the aerosol-generating article.

In some embodiments, the first planar spiral coil and the second planar spiral coil are arranged in parallel;

And/or, the first planar spiral coil and the second planar spiral coil are substantially located on the same plane.

In some embodiments, the circuit is configured to simultaneously provide an alternating current to the first planar spiral coil and the second planar spiral coil, thereby causing the first planar spiral coil and the second planar spiral coil to simultaneously generate a changing magnetic field to induce heating of the aerosol-generating article by induction.

In some embodiments, the first planar spiral coil and the second planar spiral coil are connected to the circuit in series or in parallel, so that the circuit controls the first planar spiral coil and the second planar spiral coil to heat simultaneously.

In some embodiments, a first electrical connector is disposed on the first planar spiral coil, and a second electrical connector is disposed on the second planar spiral coil; the first planar spiral coil and the second planar spiral coil are connected in series between the first electrical connector and the second electrical connector;

The circuit is configured to provide current flowing through the first planar spiral coil and the second planar spiral coil simultaneously through the first electrical connector and the second electrical connector, thereby causing the first planar spiral coil and the second planar spiral coil to be heated simultaneously.

In some embodiments, the first planar spiral coil and the second planar spiral coil have parallel axes;

The directions of the changing magnetic fields simultaneously generated by the first planar spiral coil and the second planar spiral coil are opposite along the axis.

In some embodiments, the first planar spiral coil and the second planar spiral coil are arranged on the same side of the receiving cavity.

In some embodiments, the aerosol-generating article comprises an aerosol-generating substrate; the aerosol-generating substrate is configured to generate an aerosol when heated;

The first and second planar helical coils are arranged to simultaneously heat different regions or portions of the aerosol-generating substrate to generate an aerosol.

In some embodiments, the receiving cavity includes a first side and a second side that are opposite to each other;

The first planar spiral coil is arranged on a first side of the receiving cavity, and the second planar spiral coil is arranged on a second side of the receiving cavity.

In some embodiments, the axes of the first planar spiral coil and the second planar spiral coil are substantially coincident.

In some embodiments, the first planar helical coil and the second planar helical coil are configured to generate a varying magnetic field, thereby inducing heating of the aerosol-generating article by induction.

In some embodiments, the heating device further comprises:

A first magnetic shielding element is at least partially located on a side of the first planar spiral coil facing away from the receiving cavity, so as to concentrate or distort the changing magnetic field generated by the first planar spiral coil toward the receiving cavity; and/or a second magnetic shielding element is at least partially located on a side of the second planar spiral coil facing away from the receiving cavity, so as to concentrate or distort the changing magnetic field generated by the second planar spiral coil toward the receiving cavity.

In some embodiments, the first planar spiral coil and the second planar spiral coil are formed by continuously spirally winding the same wire material.

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

A replaceable aerosol-generating article that can be heated to generate an aerosol;

Reusable heating device, comprising:

a receiving chamber for receiving the aerosol-generating article;

At least one planar spiral coil is provided for heating the aerosol-generating article received in the receiving cavity; the planar spiral coil comprises at least a first planar spiral layer and a second planar spiral layer arranged in a stacked manner.

In some embodiments, the first planar helical layer and the second planar helical layer are formed by continuously spirally winding a same wire.

In some embodiments, the first planar helical layer and the second planar helical layer are both wound in a clockwise or counterclockwise spiral.

In some embodiments, the first planar helical layer and the second planar helical layer are in different planes.

In some embodiments, it further includes:

The circuit is configured to provide an alternating current to the planar spiral coil so that the first planar spiral layer and the second planar spiral layer generate a changing magnetic field, thereby heating the aerosol generating article by induction; the directions of the magnetic fields generated by the first planar spiral layer and the second planar spiral layer are the same along the axis of the planar spiral coil.

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

a receiving chamber for receiving the aerosol-generating article;

a first planar spiral coil and a second planar spiral coil arranged in a spaced relationship for heating the aerosol-generating article received in the receiving cavity;

Circuitry operatively connects the first planar spiral coil and the second planar spiral coil to control the first planar spiral coil and the second planar spiral coil to simultaneously heat the aerosol-generating article.

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

At least one planar spiral coil is provided for heating the aerosol-generating article received in the receiving cavity; the planar spiral coil comprises at least a first planar spiral layer and a second planar spiral layer arranged in a stacked manner.

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

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

Reusable heating device, comprising:

at least one planar helical coil; said at least one magnetic field generator capable of generating a varying magnetic field penetrating said substrate when said aerosol-generating article is received or positioned on said first side;

The planar spiral coil has a first direction and a second direction perpendicular to the first direction; the planar spiral coil has a first dimension along the first direction and a second dimension along the second direction; the first dimension is greater than the second dimension.

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

At least one planar spiral coil for heating the aerosol-generating product received in the receiving chamber; the planar spiral coil has a first direction and a second direction perpendicular to the first direction; the planar spiral coil has a first dimension along the first direction and a second dimension along the second direction; the first dimension is larger than the second dimension.

In some embodiments, the first direction is the length of the planar spiral coil; the second direction is the width of the planar spiral coil. In some embodiments, the first dimension is the length of the planar spiral coil; the second direction is the width of the planar spiral coil.

The above aerosol generating system, which heats the aerosol-generating article simultaneously by the first planar spiral coil and the second planar spiral coil, is advantageous for accelerating or enhancing the formation of aerosol.

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 in one embodiment of the present application;

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 an exploded schematic diagram of the plurality of planar spiral coils in FIG5 before assembly;

FIG7 is a schematic diagram of the current flowing through the two planar spiral coils connected in series in FIG6;

FIG8 is a schematic diagram of currents flowing through two planar spiral coils connected in series in yet another embodiment of the present application;

FIG9 is a schematic diagram of a circuit for driving two planar spiral coils connected in series in one embodiment of the present application;

FIG10 is a cross-sectional exploded schematic diagram of an aerosol generating system according to another embodiment of the present application;

FIG11 is a schematic diagram of the aerosol-generating article in FIG10 received in the heating device, with the plurality of substrates respectively positioned between the plurality of first planar spiral coils and the plurality of second planar spiral coils;

FIG12 is a schematic diagram of a circuit for driving the first planar spiral coil and the second planar spiral coil relative to each other in FIG10;

FIG13 is a schematic diagram of an aerosol generating system according to another embodiment of the present application;

FIG14 is a schematic structural diagram of the planar spiral coil in FIG13 from another perspective;

FIG15 is a cross-sectional schematic diagram of the planar spiral coil in FIG14 from another perspective;

FIG16 is an exploded schematic diagram of a heating device according to another embodiment of the present application from one perspective;

FIG17 is a schematic diagram of an embodiment of a partial circuit arranged on the circuit board in FIG16;

FIG18 is a schematic diagram of the basic components of one embodiment of the circuit of FIG17;

FIG19 is a schematic diagram of an equivalent model of the third switching transistor in FIG18 during operation;

FIG20 is a schematic diagram of a switch control and protection unit according to another embodiment of the present application;

FIG21 is an exploded schematic diagram of an aerosol-generating article according to another embodiment of the present application from one perspective;

FIG22 is a schematic diagram of the crossbeam and the number of FIG21 assembled in the pallet;

FIG23 is an exploded schematic diagram of an aerosol-generating article according to another embodiment of the present application from one perspective;

FIG24 is a schematic diagram of one of the plurality of substrates and one of the plurality of planar spiral coils when the aerosol-generating article is received in a heating device according to another embodiment of the present application;

FIG25 is a schematic diagram of a planar spiral coil according to another embodiment of the present application;

FIG26 is a schematic diagram of a substrate according to yet another embodiment of the present application.

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 independently prepared and then assembled and connected; and 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 an airtight seal can be formed between them by a sealing ring, such as an O-ring. 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 on which 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 on which the induction heater 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 a flake. The sheet or flake shape can be characterized as the aerosol-generating article 200 having a length greater than or equal to a width, and a width 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 .

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 matrix 241 may be in the form of a dense sheet; or in other embodiments, the matrix 241 may be in the form of a net having mesh openings, thereby making the matrix 241 fluid permeable.

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.

As shown in FIG4 to FIG5 , the heating device 100 further includes:

The battery cell 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 heater;

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 an MCU controller; the main circuit board 20 includes a first portion 21 and a second portion 22 arranged in a longitudinal direction; at least a portion of the second portion 22 is located between the battery cell 10 and the rear side 160; and the first portion 21 is at least partially located between the receiving cavity 510 and/or the induction heater 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 houses an MCU controller, etc., for controlling the power supply to the heater. Alternatively, the first portion 21 of the main circuit board 20 is used to control the power supply to the heater. The first portion 21 of the main circuit board 20 houses at least one inverter circuit for converting the direct current output by the battery cell 10 into an alternating current that is supplied 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 that 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 supplied to the at least one planar spiral coil 30.

As shown in FIG. 2 to FIG. 5 , 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. 5 , 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 5, 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 some embodiments, the extension portion 52 is located between the receiving cavity 510 and the battery cell 10. In some embodiments, the extension portion 52 is hollow and has at least one cavity therein.

As shown in FIG. 2 to FIG. 5 , 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 , 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 and FIG. 5 , a partition wall 53 is further arranged in the extension portion 52 and extends toward and terminates at the end 530 , so as to separate the first air intake passage R11 from the second air intake passage R12 .

As shown in FIG. 2 to FIG. 5 , 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 5 , the second bracket 40 is provided with a first annular flange 41 and a second annular flange 42 on its surface facing the front side 150 and/or the first bracket 50. The first annular flange 41 and the second annular flange 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, and are then surrounded by the first annular flange 41. The first annular flange 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 first annular flange 41, then through the second bracket 40 and connect to the main circuit board 20.

As shown in FIG. 4 to FIG. 7 , the heating device 100 further includes:

At least one or more induction heaters are disposed between the receiving cavity 510 and the rear side 160; the at least one or more induction heaters can be powered by the main circuit board 20. In the embodiments shown in Figures 4 to 7, the at least one or more induction heaters 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 induction heaters induce heating of the aerosol-generating article 200 through the 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 induction heaters is respectively opposite to the aerosol-generating matrix 242 and/or each of the bases 241, so that each induction heater can heat the relative base 241.

Alternatively, in more varied embodiments, the heating device 100 further includes one or more heaters, including at least one of a resistive heater, an infrared heater, or a light heater. When the aerosol-generating article 200 is received in the receiving chamber, the heater generates heat through resistive Joule heating, which in turn transfers heat to heat the aerosol-generating substrate 242 of the aerosol-generating article 200. Alternatively, the heater radiates infrared light to heat the aerosol-generating substrate 242 of the aerosol-generating article 200.

In the embodiments shown in Figures 4 to 7 , the induction heater is substantially planar. In an embodiment, the induction heater comprises a planar spiral coil 30. When the aerosol-generating article 200 is received in the receiving chamber, the induction heater is arranged substantially parallel to the substrate 241. In Figures 4 to 10 , the planar spiral coil 30 is circular in shape; in other alternative embodiments, the planar spiral coil 30 is 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 a substrate 241 of the aerosol-generating article 200 individually, and the amount of total particulate matter (TPM) generated 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 7 , the plurality of planar spiral coils 30 are substantially discretely arranged and substantially all located in the same plane.

In the embodiments shown in Figures 4 to 7 , the plurality of planar spiral coils 30 are not independently connected to the main circuit board 20. In the embodiments shown in Figures 4 to 7 , at least two of the plurality of planar spiral coils 30 are connected in series, thereby simultaneously generating a magnetic field during use. Alternatively, the plurality of planar spiral coils 30 are connected in series in pairs.

For example, according to the embodiments shown in Figures 4 to 7 , the plurality of planar spiral coils 30 are respectively designated as or include: planar spiral coil 30A, planar spiral coil 30B, planar spiral coil 30C, planar spiral coil 30D, planar spiral coil 30E, and planar spiral coil 30F. Planar spiral coil 30A and planar spiral coil 30B are connected in series, planar spiral coil 30C and planar spiral coil 30D are connected in series, and planar spiral coil 30E and planar spiral coil 30F are connected in series.

FIG6 illustrates a series configuration of two planar spiral coils 30. In FIG6 , planar spiral coil 30A is provided with electrical connectors 311 and 312. Electrical connector 311 extends from a radially inner first end of planar spiral coil 30A, while electrical connector 312 extends from a radially outer second end of planar spiral coil 30A. Similarly, planar spiral coil 30B is provided with electrical connectors 321 and 322. Electrical connector 321 extends from a radially inner first end of planar spiral coil 30B, while electrical connector 322 extends from a radially outer second end of planar spiral coil 30B. Planar spiral coils 30A and 30B are connected in series by connecting electrical connectors 311 and 322. These are then connected to the main circuit board 20 via electrical connectors 312 and 321, respectively. The main circuit board 20 then supplies alternating current to the series-connected planar spiral coils 30A and 30B via electrical connectors 312 and 321, respectively. As shown in FIG. 7 , when current flows through the planar spiral coil 30A and the planar spiral coil 30B, the current i11 on the planar spiral coil 30A and the current i12 on the planar spiral coil 30B are both clockwise spirals. According to the right-hand spiral rule, when the planar spiral coil 30A and the planar spiral coil 30B operate simultaneously, the directions of the magnetic fields they generate are the same along the axis.

Alternatively, FIG8 illustrates a series connection arrangement of planar spiral coil 30A and planar spiral coil 30B in yet another alternative embodiment. As shown in FIG8 , planar spiral coil 30A and planar spiral coil 30B are connected in series by connecting electrical connector 311 and electrical connector 321a. Main circuit board 20 then supplies alternating current to planar spiral coil 30A and planar spiral coil 30B via electrical connector 312a and electrical connector 322a. As shown in FIG8 , when current flows through planar spiral coil 30A and planar spiral coil 30B, one of current i11 in planar spiral coil 30A and current i12 in planar spiral coil 30B spirals clockwise, while the other spirals counterclockwise. Therefore, according to the right-hand spiral rule, when planar spiral coil 30A and planar spiral coil 30B operate simultaneously, the directions of the magnetic fields they generate are opposite along their axes.

In some embodiments, planar spiral coil 30A and planar spiral coil 30B are independently wound in a planar spiral from a conductive material, and then their respective electrical connections are welded together via conductive wires to form a series connection. Alternatively, in other variations, planar spiral coil 30A and planar spiral coil 30B are continuously wound in a spiral from the same conductive material. In some embodiments, the length of the conductive wire providing the series connection between planar spiral coil 30A and planar spiral coil 30B is minimized. This portion of the conductive wire is ineffective during use, while excessive length simply increases internal resistance.

FIG9 is a schematic diagram of a portion of a circuit disposed on main circuit board 20 in one embodiment, for connecting planar spiral coil 30A and planar spiral coil 30B in series to provide alternating current to planar spiral coil 30A and planar spiral coil 30B in series. As shown in FIG9 , the circuit includes:

A bridge circuit, for example, includes a half-bridge consisting of a first switch tube Q1 and a second switch tube Q2;

A switch transistor driver 211, such as a commonly used MOS transistor driver chip FD2204, is used to drive the first switch transistor Q1 and the second switch transistor Q2 to be turned on and off;

Capacitors, such as capacitors C1 and C2, are used to form an LC oscillator with the planar spiral coil 30A and the planar spiral coil 30B connected in series. For example, in FIG9 , capacitors C1 and C2 respectively form a symmetrical half-bridge LC oscillator with the planar spiral coil 30A and the planar spiral coil 30B connected in series.

The MCU controller on the main circuit board 20 controls the switch driver 211 to alternately turn on and off the first switch Q1 and the second switch Q2, thereby generating an alternating current flowing through the planar spiral coil 30A and the planar spiral coil 30B. This causes the series-connected planar spiral coils 30A and 30B to simultaneously generate a varying magnetic field, inducing eddy current heating in the opposing substrates 241. Similarly, the main circuit board 20 can also connect the series-connected planar spiral coils 30C and 30D, and the series-connected planar spiral coils 30E and 30F, using the same circuit arrangement to provide alternating current to each of them.

In the embodiments shown in Figures 4 to 6, the six planar spiral coils 30 are connected in series in pairs and then respectively connected to the main circuit board 20; during use, the main circuit board 20 can supply power to the two planar spiral coils 30 connected in series during each inhalation of the user, thereby simultaneously heating the two bases 241 and the two aerosol-generating substrates 242 in the aerosol-generating article 200 to generate aerosol.

Or in some alternative embodiments, more of the plurality of planar spiral coils 30 are connected in series; for example, three or four of the six planar spiral coils 30 are connected in series.

Alternatively, in some alternative embodiments, two of the multiple planar spiral coils 30, for example, the planar spiral coil 30A and the planar spiral coil 30B, are simultaneously connected in parallel to the main circuit board 20; thus, the main circuit board 20 can supply power to the two parallel planar spiral coils 30 during each inhalation of the user, thereby simultaneously heating the two substrates 241 and the two aerosol-generating matrices 242 in the aerosol-generating article 200 to generate aerosol.

FIG10 shows a schematic diagram of an aerosol generating system according to another embodiment; in this embodiment, the aerosol generating system comprises:

A replaceable aerosol-generating article 200a is provided as a consumable, and a heating device 100a receives and heats the aerosol-generating article 200a.

The aerosol generating article 200a includes:

A sheet-like tray 210a having a plurality of discrete or arrayed cavities or holes 211a;

A plurality of substrates 220a are discretely or arrayed in the cavities or holes 211a of the tray 210a; each of the plurality of substrates 220a is respectively arranged in one of the plurality of cavities or holes 211a of the tray 210a;

The aerosol-generating substrate 230a comprises a plurality of discrete substrate units, each of which is located within the plurality of cavities or holes 211a and in thermal conductivity or contact with the substrate 220a. Each of the plurality of substrate units is bonded to one of the plurality of substrates 220a.

In the embodiment shown in FIG10 , the tray 210a is primarily used to support the base 220a and the aerosol-generating matrix 230a. In some embodiments, the tray 210a includes or is paper; for example, the tray 210a includes fiber paper made from wood fiber, hemp fiber, flax fiber, bamboo fiber, or the like. Alternatively, in still other variations, the tray 210a may be made of metal, ceramic, glass, or plastic. The tray 210a is insulating. The tray 210a is made of a material with low thermal conductivity and low mass heat capacity, such as zirconium oxide, glass, or PEEK (polyetheretherketone), and its long-term temperature resistance needs to be no less than 250°C. The base 220a is made of the receptive metal or alloy material described above, and can be induced to generate heat during use to heat the matrix units of the aerosol-generating matrix 230a to form an aerosol.

In the embodiment shown in FIG10 , the heating device 100 a comprises:

The housing 180a defines the outer surface of the heating device 100a. The housing 180a defines a receiving cavity 510a for receiving the aerosol-generating article 200a. The housing 180a defines at least one air inlet 114a and at least one air outlet 113a. During inhalation, air enters through the air inlet 114a, flows through the receiving cavity 510a, and carries the aerosol generated by the heated aerosol-generating article 200a to the air outlet 113a, as indicated by arrow R2 in FIG. 10 .

Battery cell 10a and main circuit board 20a;

The axes of the first planar spiral coils 30a and the second planar spiral coils 70a are substantially aligned with each other.

In some embodiments, the aerosol-generating article 200a is substantially sheet-like, with a length greater than or equal to a width, and a width greater than a thickness.

As shown in FIG11 , when the aerosol-generating article 200a is received in the receiving chamber 510a of the heating device 100a, each of the plurality of substrates 220a of the aerosol-generating article 200a is positioned between a first planar spiral coil 30a and a second planar spiral coil 70a, respectively, facing each other. Furthermore, during use, each of the plurality of substrates 220a can be simultaneously induced to generate heat by a magnetic field generated from both sides by the first planar spiral coil 30a and the second planar spiral coil 70a. By inducing heating of the substrate 220a by the two planar spiral coils simultaneously generating a magnetic field from both sides, the substrate 220a can more quickly absorb magnetic field energy and, therefore, be heated more quickly.

In an embodiment, the plurality of first planar spiral coils 30a are respectively opposed to or aligned with the plurality of second planar spiral coils 70a. The opposed first planar spiral coils 30a and second planar spiral coils 70a are substantially coaxial; and the first planar spiral coils 30a and second planar spiral coils 70a are parallel.

In some embodiments, the opposing first and second planar spiral coils 30a and 70a can be connected in series or in parallel, and then connected to the main circuit board 20a. The main circuit board 20a then simultaneously supplies alternating current to both coils, causing them to simultaneously generate magnetic fields. For example, in the embodiment shown in FIG11 , the electrical connector 311a of the first planar spiral coil 30a and the electrical connector 711a of the opposing second planar spiral coil 70a can be connected in series via conductive wires. The electrical connector 312a of the first planar spiral coil 30a and the electrical connector 712a of the second planar spiral coil 70a can then be connected to the main circuit board 20a to conduct the alternating current. Alternatively, in other embodiments, the electrical connector 311a of the first planar spiral coil 30a and the electrical connector 711a of the opposing second planar spiral coil 70a can be soldered together, and the electrical connector 312a and the electrical connector 712a can be soldered together. These can then be connected in parallel to the main circuit board 20a to conduct the alternating current.

For example, FIG12 shows a schematic diagram of a circuit arranged on a main circuit board 20a in one embodiment, which connects a first planar spiral coil 30a and a second planar spiral coil 70a in parallel and conducts an alternating current through the first planar spiral coil 30a and the second planar spiral coil 70a. In the embodiment shown in FIG12, the circuit includes:

The bridge circuit includes, for example, a half-bridge composed of a first switch tube Q3 and a second switch tube Q4;

The switch transistor driver 211a, such as a commonly used MOS transistor driver chip FD2204, is used to drive the first switch transistor Q3 and the second switch transistor Q4 to be turned on and off;

Capacitors, such as capacitors C3 and C4, are used to form an LC oscillator with the planar spiral coil 30A and the planar spiral coil 30B connected in series. For example, in FIG9 , capacitors C1 and C2 respectively form a symmetrical half-bridge LC oscillator with the first planar spiral coil 30a and the second planar spiral coil 70a connected in parallel.

The MCU controller on the main circuit board 20a controls the switch tube driver 211a to alternately turn on and off the first switch tube Q3 and the second switch tube Q4, thereby forming an alternating current flowing through the first planar spiral coil 30a and the second planar spiral coil 70a, so that the first planar spiral coil 30a and the second planar spiral coil 70a simultaneously generate a changing magnetic field to induce eddy current heating in their respective relative substrates 220a.

As shown in FIG10 , a first magnetic shielding element 33a is disposed on a side of the first planar spiral coil 30a facing away from the receiving cavity 510a and/or the second planar spiral coil 70a. The first magnetic shielding element 33a is generally configured in a planar or sheet-like shape. The first magnetic shielding element 33a is substantially parallel to the first planar spiral coil 30a. The first magnetic shielding element 33a concentrates or distorts the magnetic field energy generated by the first planar spiral coil 30a toward the base 220a or the receiving cavity 510a as much as possible.

As shown in FIG10 , a second magnetic shielding element 71a is disposed on a side of the second planar spiral coil 70a facing away from the receiving cavity 510a and/or the first planar spiral coil 70a. The second magnetic shielding element 71a is generally configured to be planar or sheet-like. The second magnetic shielding element 71a is generally parallel to the second planar spiral coil 70a. The second magnetic shielding element 71a concentrates or distorts the magnetic field energy generated by the second planar spiral coil 70a toward the base 220a or the receiving cavity 510a as much as possible.

In some embodiments, the first magnetic shield element 33a and/or the second magnetic shield element 71a have a thickness of approximately 0.2 to 2.0 mm. The first magnetic shield element 33a and/or the second magnetic shield element 71a are configured as thin films. The first magnetic shield element 33a is generally square or circular, sheet-like in shape. The area of the first magnetic shield element 33a is equal to or greater than the area of the planar spiral coil 300. In some embodiments, the planar spiral coil 300 has a diameter of approximately 5 to 10 mm; accordingly, the area of the first magnetic shield element 33a is 50 mm² to 200 mm².

In some embodiments, the first magnetic shield element 33a and/or the second magnetic shield element 71a has a thickness of about 0.2 to 2.0 mm. The first magnetic shield element 33a and/or the second magnetic shield element 71a is configured in the form of a thin film.

In some embodiments, the first magnetic shield element 33a and/or the second magnetic shield element 71a may comprise, for example, ferrite. Ferrite can refer to a magnetic material based on a magnetic metal oxide, including magnetic ceramics. Typically, ferrite may comprise an oxide or composite oxide of a ferromagnetic metal. The first magnetic shield element 33a and/or the second magnetic shield element 71a comprising ferrite material may have high electrical conductivity and high magnetic permeability. Alternatively, in yet other embodiments, the first magnetic shield element 33a and/or the second magnetic shield element 71a may comprise a highly magnetically permeable alloy, such as an iron-based alloy, and may be included in the first magnetic shield element 33a and/or the second magnetic shield element 71a.

Alternatively, in some other embodiments, the first magnetic shielding element 33a and/or the second magnetic shielding element 71a may have a laminated or multi-layered structure. For example, the first magnetic shielding element 33a and/or the second magnetic shielding element 71a may include at least: a magnetic shielding functional layer and a flexible support layer. The magnetic shielding functional layer may be made of the aforementioned ferrite material or high-permeability alloy to provide magnetic shielding; the flexible support layer may include polyethylene terephthalate (PET) or polyimide (PI) to provide a cushion during assembly and extrusion, thereby reducing cracking or powdering of the magnetic shielding functional layer.

Alternatively, in some other embodiments, the first magnetic shielding element 33a and/or the second magnetic shielding element 71a may further include an adhesive layer bonded to the magnetic shielding functional layer or the flexible support layer, for assembling and securing the first magnetic shielding element 33a and/or the second magnetic shielding element 71a by adhesive bonding. For example, the first magnetic shielding element 33a may be bonded to the side surface of the first planar spiral coil 30a, or the second magnetic shielding element 71a may be bonded to the side surface of the second planar spiral coil 70a. The adhesive layer may be made of, for example, at least one of epoxy resin, polyparaxylene polymer, or polyparaxylene polymer.

In some embodiments, the first magnetic shielding element 33a is attached or bonded to the surface of the first planar spiral coil 30a facing away from the receiving cavity 510a. In some embodiments, the second magnetic shielding element 71a is attached or bonded to the surface of the first planar spiral coil 30a facing away from the receiving cavity 510a.

In some preferred embodiments, when the opposing first planar spiral coil 30a and second planar spiral coil 70a simultaneously generate magnetic fields, the directions of the magnetic fields generated by the first planar spiral coil 30a and the second planar spiral coil 70a are opposite in the direction of the axis. In some optional embodiments, the electrical connectors of the first planar spiral coil 30a and the second planar spiral coil 70a can be connected to the main circuit board 20a so that the spiral directions of the currents in the first planar spiral coil 30a and the second planar spiral coil 70a are opposite. For example, when operating simultaneously, a clockwise current flows through one of the opposing first planar spiral coil 30a and second planar spiral coil 70a, while a counterclockwise current flows through the other. Simultaneously inducing eddy current heating in the substrate 220a on both sides of the substrate 220a with opposing magnetic field directions is beneficial for improving the heating efficiency of the substrate 220a.

For example, FIG13 shows a schematic diagram of an aerosol generating system according to another embodiment; in this embodiment, a heating device 100b comprises:

The housing 180b defines the outer surface of the heating device 100b. The housing 180b defines a receiving cavity 510b for receiving the aerosol-generating article 200b. The housing 180b defines at least one air inlet 114b and at least one air outlet 113b. During inhalation, air enters through the air inlet 114b, flows through the receiving cavity 510b, and carries the aerosol generated by the heated aerosol-generating article 200b to the air outlet 113b.

Battery cell 10b and main circuit board 20b;

Multiple planar spiral coils 30b are arranged on one side of the receiving chamber 510b. When the aerosol-generating article 200b is received in the receiving chamber 510b of the heating device 100b, each of the multiple substrates 220b of the aerosol-generating article 200b faces each of the multiple planar spiral coils 30b. Furthermore, during use, each of the multiple substrates 220b can be induced to generate heat due to the magnetic field generated from one side by the opposing planar spiral coils 30b, which in turn heats the substrate units of the aerosol-generating substrate 230b bonded to the substrate 220b to generate an aerosol.

14 and 15 , the planar spiral coil 30 b is a double-layered spiral coil. The planar spiral coil 30 b includes a first planar spiral layer 31 b and a second planar spiral layer 32 b . The first planar spiral layer 31 b and the second planar spiral layer 32 b are arranged substantially in a stacked manner.

In some embodiments, planar spiral coil 30b having first planar helical layer 31b and second planar helical layer 32b is formed by continuously spirally winding a single wire in two planes. Alternatively, in other embodiments, planar spiral coil 30b having first planar helical layer 31b and second planar helical layer 32b is formed by stacking two planar spiral coils and then connecting them with electrical connectors.

As shown in Figures 14 and 15 , the first and second planar helical layers 31b, 32b of planar spiral coil 30b have substantially the same diameter or area. Planar spiral coil 30b is provided with an electrical connector 311b extending radially from one side of first planar helical layer 31b, and an electrical connector 312b extending radially from the other side of first planar helical layer 31b.

As shown in Figures 14 and 15 , when a planar spiral coil 30b is formed by spirally winding the same wire in two planes, the wire is wound in either a clockwise or counterclockwise direction. For example, in the embodiments shown in Figures 14 and 15 , the first planar spiral layer 31b is formed by spirally winding the wire radially inward in a clockwise direction from the electrical connector 311b, while the second planar spiral layer 32b is formed by spirally winding the wire radially outward in a clockwise direction from the radial center to the electrical connector 321b. When alternating current is applied to generate a magnetic field through the electrical connectors 311b and 312b, the currents in the first and second planar spiral layers 31b and 32b have the same spiral direction, resulting in the magnetic fields generated by the first and second planar spiral layers 31b and 32b having the same direction. This is beneficial for preventing the magnetic fields generated by the first and second planar spiral layers 31b and 32b from canceling each other out.

As shown in Figures 14 and 15 , the planar spiral coil 30b includes only two planar spiral layers, a first planar spiral layer 31b and a second planar spiral layer 32b. Alternatively, in some alternative embodiments, the planar spiral coil 30b may include more planar spiral layers, such as a third planar spiral layer, a fourth planar spiral layer, and so on.

Alternatively, FIG16 shows a schematic diagram of a heating device 100c according to another embodiment; in this embodiment, the heating device 100c includes:

A plurality of planar spiral coils 30c, arranged discretely or in an array, are configured to generate aerosol by generating a varying magnetic field to induce heating of the aerosol-generating article within the receiving cavity 510c of the first holder 50c. Furthermore, the plurality of planar spiral coils 30c are individually connected to the main circuit board 20c, so that the main circuit board 20 can individually supply an alternating current to each of the plurality of planar spiral coils 30c, thereby causing each of the plurality of planar spiral coils 30c to generate a magnetic field to induce heating of the substrate of the aerosol-generating article.

For example, FIG17 shows a block diagram of a portion of a circuit capable of individually providing an alternating current to each of a plurality of planar spiral coils 30c in one embodiment. As shown in FIG17 , the circuit includes:

The inverter 212c is controlled by the MCU controller 211c and is used to convert the DC current provided by the battery cell 10c into AC current;

Each of the plurality of planar spiral coils 30c is operably connected to the inverter 212c via a switch, so as to provide an alternating current to each of the plurality of planar spiral coils 30c during use, so as to activate one of the plurality of planar spiral coils 30c for heating in each heating operation.

FIG18 shows a schematic diagram of a circuit capable of individually providing an alternating current to each of a plurality of planar spiral coils 30 c in a specific embodiment. As shown in FIG18 , the inverter 212 c of the circuit includes:

A bridge circuit, comprising a half-bridge consisting of a first switch tube Q11 and a switch tube Q12;

The half-bridge driver 2121c is controlled by the MCU controller 211c to drive the first switch tube Q11 and the switch tube Q12 to be alternately turned on and off;

Capacitor C11;

Multiple third switching transistors include a third switching transistor Q21, a third switching transistor Q22, a third switching transistor Q23, a third switching transistor Q24, a third switching transistor Q25, and a third switching transistor Q26. Each of the multiple switches is respectively used to operably connect one of the multiple planar spiral coils 30c to the capacitor C11, thereby operably forming an asymmetric half-bridge LC oscillator with one of the multiple planar spiral coils 30c and the capacitor C11. The first switching transistor Q11 and the second switching transistor Q12 are then alternately turned on and off to enable the LC oscillator, thereby forming an alternating current flowing through the planar spiral coil 30c.

In the specific device connection shown in Figure 18, the first end of each of the multiple planar spiral coils 30c is connected to the capacitor C11, and the second end is grounded through the third switch tube to form an LC oscillator. For example, the second ends of the multiple planar spiral coils 30c in Figure 18 are grounded through the third switch tubes Q21, Q22, Q23, Q24, Q25, and Q26 respectively. When one of the third switch tubes Q21, Q22, Q23, Q24, Q25, and Q26 is turned on and the others are turned off, the turned-on third switch tube connects the corresponding planar spiral coil 30c and the capacitor C11 to form an LC oscillator.

In some embodiments, during multiple puffs taken by a user, the MCU controller 211c controls one of the third switches Q21-Q26 to conduct sequentially in a predetermined order. Consequently, only one planar spiral coil 30c is connected to the capacitor C11 to form an LC oscillator, thereby generating an alternating current flowing through the planar spiral coil 30c. Consequently, during each puff, only one of the planar spiral coils 30c induces heating of the opposing substrate.

FIG19 shows a schematic diagram of an equivalent model of the third switching transistors Q21-Q26, which utilize N-MOSFETs, during operation. As shown in FIG19 , the third switching transistors Q21-Q26 have a relatively high withstand voltage (Vds) during operation. This withstand voltage must be greater than the peak resonant voltage, otherwise the high AC voltage at the d-pole will break down the MOSFET. Furthermore, the equivalent impedances of Cgd (the equivalent capacitance between the g-pole and d-pole) and Cds (the equivalent capacitance between the d-pole and s-pole) must be as large as possible at the operating frequency of the LC oscillator's resonant voltage to minimize AC power losses. Since the withstand voltage between Vgs (the gate-source voltage between the g-pole and s-pole) is generally limited, the voltage from the d-pole to the g-pole represents the resonant voltage of the LC oscillator during operation and is generally relatively high. Therefore, Vgs must be protected to prevent damage and the AC voltage on the g-pole from crosstalking to the NMOSFET when the NMOSFET is not turned on, which may cause the NMOSFET to be turned on frequently. Therefore, the voltage between Vgs must be limited to the minimum turn-on voltage.

Furthermore, in the specific device connection shown in FIG18 , the circuit further includes:

Multiple switch control and protection units 213c are respectively used to control and protect the conduction and disconnection of multiple third switch tubes, namely the third switch tube Q21, the third switch tube Q22, the third switch tube Q23, the third switch tube Q24, the third switch tube Q25 and the third switch tube Q26; each switch control and protection unit 213c includes a diode D and a switch K, and the MCU controller 211c provides a signal through the diode D to turn on or off the third switch tubes, namely Q21-Q26.

Diode D in the switch control and protection unit 213c is connected between the MCU controller 211c and the gates of the third switching transistors, Q21-Q26. Diode D provides protection by preventing damage to low-voltage components on the control side, such as the MCU controller 211c, when the resonant high-voltage AC current generated by the planar spiral coil 30c is applied to the drains of the connected third switching transistors, Q21-Q26, and then flows through the equivalent capacitors within the third switching transistors, Q21-Q26, to the gates.

The switch K in the switch control and protection unit 213c is configured to protect the connected third switching transistors Q21-Q26. Specifically, the third switching transistors Q21-Q26 generally have a relatively low withstand voltage, typically less than 20V. When high-voltage AC current is applied to the gates of the third switching transistors Q21-Q26 during oscillation, the switch K is turned on and opened promptly, discharging a large current to protect the third switching transistors Q21-Q26 from breakdown.

In the specific embodiment shown in Figure 18, the switch control and protection unit 213c may further include one or more current limiting resistors. The one or more current limiting resistors may be connected between the diode D and the MCU controller 211c, or between the switch K and the MCU controller 211c.

Alternatively, FIG. 20 shows a schematic diagram of a switch control and protection unit 213c according to another embodiment of the present invention. As shown in FIG. 20 , the improved switch control and protection unit 213c includes:

Diode D is arranged between the MCU controller 211c and the third switching tubes Q21-Q26 to prevent the resonant high-voltage AC current from flowing through the equivalent capacitors inside the third switching tubes Q21-Q26 to the gate, thereby protecting the MCU controller 211c at the control end from being damaged;

The voltage divider resistor R21 and the resistor R22 connected in series are used to divide the control voltage provided by the MCU controller 211c;

The switch K1 is connected to the gates of the third switching transistors Q21 to Q26 via the resistor R23; the gate of the switch K1 is connected between the resistor R21 and the resistor R22;

The switch K2 connects the gates of the third switching transistors Q21 - Q26 to ground; the gate of the switch K2 is connected between the switch K1 and the resistor R23 .

In this embodiment, the switch control and protection unit 213c includes current dump switches of switches K1 and K2, which can more accurately eliminate the AC voltage on the gates of the non-conducting third switch tubes, i.e., Q21-Q26, and thus limit the Vgs voltage of the non-conducting third switch tubes, i.e., Q21-Q26, to 0V, thereby preventing the third switch tubes, i.e., Q21-Q26, from being micro-conducted.

21 and 22 show schematic diagrams of an aerosol-generating article 200d according to yet another embodiment; in this embodiment, the aerosol-generating article 200d comprises:

The outer body defining the enclosed volume is jointly defined by the cover plate 231d and the tray 232d; specifically, the cover plate 231d and the tray 232d are combined along the thickness direction of the aerosol generating article 200d to form or define the outer body of the aerosol generating article 200d.

The tray 232d is provided with a first flange 233d on one side in the width direction and a second flange 234d on the other side in the width direction; the first flange 233d and the second flange 234d extend from one end to the other end of the tray 232d in the length direction; and a recessed portion 235d is defined between the first flange 233d and the second flange 234d, which passes through the tray 232d in the length direction.

The aerosol-generating article 200d further comprises:

A vertical beam 236d extending along the length of the aerosol-generating article 200d; at least one vertical beam 236d is mounted in the recessed portion 235d of the tray 232d and is located between the first ledge 233d and the second ledge 234d;

a plurality of cross beams 237d extending along the width of the aerosol-generating article 200d and mounted within the recessed portion 235d of the tray 232d; the plurality of cross beams 237d being partially located between the first ledge 233d and the vertical beam 236d, and partially located between the vertical beam 236d and the second ledge 234d;

After assembly, the vertical beams 236d and the plurality of horizontal beams 237d separate the recessed portion 235d of the tray 232d into a plurality of concave cavities 238d, as shown in FIG20 ;

A plurality of substrates 241d and aerosol-generating substrates 242d respectively formed on or bonded to the plurality of substrates 241d; each of the plurality of substrates 241d and the aerosol-generating substrates 242d is respectively disposed in each of the plurality of cavities 238d.

Alternatively, the aerosol-generating article 200d includes a plurality of bases 241d positioned between a cover plate 231d and a tray 232d, and aerosol-generating substrates 242d formed or bonded to the bases 241d. The bases 241d and the aerosol-generating substrates 242d are separated by vertical beams 236d and horizontal beams 237d positioned on the bases 241d.

In this embodiment, the height of the vertical beam 236d is higher than the height of the horizontal beam 237d. Consequently, after assembly, the vertical beam 236d abuts and engages with the cover plate 231d, while a gap is formed between the horizontal beam 237d and the cover plate 231d to provide a passage for air or aerosol to flow through. Alternatively, after assembly, the aerosol-generating article 200d defines two air passages located on either side of the vertical beam 236d for aerosol output.

Alternatively, FIG. 23 shows a schematic diagram of an aerosol-generating article 200e according to yet another embodiment; in this embodiment, the aerosol-generating article 200e comprises:

The outer body defining the closed volume is defined by the cover plate 231e and the tray 232e; the cover plate 231e and the tray 232e are substantially sheet-shaped;

Two vertical beams 236e are located between the cover plate 231e and the tray 232e; and the two vertical beams 236e are arranged on either side of the width of the aerosol-generating article 200e; thereby defining a cavity between the cover plate 231e and the tray 232e;

Multiple cross beams 237e extend along the width of the aerosol generating article 200e and are arranged at intervals along the length direction; the multiple cross beams 237e are located between the two vertical beams 236e, thereby dividing the cavity between the two vertical beams 236e into multiple accommodation spaces, which are respectively used to accommodate multiple substrates 241e and aerosol generating matrices 242e respectively formed or combined on the multiple substrates 241e.

In this embodiment, the aerosol-generating article 200e includes only one air channel defined between two vertical beams 236e; the air channel extends lengthwise through the outer body of the aerosol-generating article 200e. A plurality of aerosol-generating substrates 242e separated by a plurality of horizontal beams 237e are exposed within the air channel. Furthermore, the height of the horizontal beams 237e is less than that of the vertical beams 236e, thereby allowing air to flow across the horizontal beams 237e.

Alternatively, Figure 24 shows a schematic diagram of one of the multiple substrates 220e of the aerosol generating article of an aerosol generating system in another embodiment and one of the multiple planar spiral coils 30e of the heating device; as shown in Figure 24, the planar spiral coil 30e is arranged into a shape similar to a runway or an ellipse.

As shown in Figure 24 , the planar spiral coil 30e has a length direction and a width direction perpendicular to the length direction. The length dimension W11 of the planar spiral coil 30e along the length direction is greater than the width dimension W12 along the width direction. Correspondingly, the base 220e also has a shape similar to a racetrack or an ellipse. During use, the length direction of the base 220e is parallel to the length direction of the planar spiral coil 30e, and the width direction of the base 220e is parallel to the width direction of the planar spiral coil 30e. The length dimension W21 of the base 220e is greater than the width dimension W22.

In an embodiment, the length W21 of the base 220e is less than or equal to the length W11 of the planar spiral coil 30e, and the width W22 of the base 220e is less than or equal to the width W12 of the planar spiral coil 30e. This is more advantageous for improving the base 220e's ability to receive a magnetic field.

As shown in FIG. 24 , the racetrack-shaped planar spiral coil 30 e further has a central hole 314 e ; the central hole 314 e is a strip-shaped hole with a length greater than a width.

Alternatively, FIG. 25 shows a schematic diagram of a planar spiral coil 30f for an aerosol generating system according to another embodiment. In this embodiment, the planar spiral coil 30f comprises a plurality of planar spiral layers, for example, a first planar spiral layer 31f and a second planar spiral layer 32f, stacked in the thickness direction. The first planar spiral layer 31f and the second planar spiral layer 32f are shaped like a racetrack or an ellipse, and the length of the first planar spiral layer 31f and the second planar spiral layer 32f are greater than the width.

Alternatively, Figure 26 shows a schematic diagram of a substrate 220g for an aerosol generating system according to another embodiment. In this embodiment, the substrate 220g is provided with a plurality of meshes 221g, thereby making the substrate 220g fluid-permeable. In some embodiments, the substrate 220g having the meshes 221g is formed by mechanically punching, chemically etching, or laser drilling a dense sheet-like precursor; mechanical drilling can be performed by punching or drilling. The mesh-like substrate 220g is advantageous in that heat is more evenly generated and distributed on the substrate 220g during hysteresis heating. Furthermore, it is advantageous in causing the substrate 220g to heat up more rapidly during hysteresis heating.

In some embodiments, the ratio of the area of the mesh 221g on the substrate 220g to the area of the square substrate 220g is greater than 30%; in some specific embodiments, the ratio of the area of the mesh 221g on the substrate 220g to the area of the substrate 220g is between 50% and 70%.

As shown in Figure 26, the base 220g further has a central hole 222g. In use, the central hole 222g of the base 220g is coaxially aligned with the central hole 314e of the racetrack-shaped planar spiral coil 30e, which is beneficial for enhancing magnetic field utilization.

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 (22)

An aerosol generating system, characterized by comprising: A replaceable aerosol-generating article that can be heated to generate an aerosol; Reusable heating device, comprising: a receiving chamber for receiving the aerosol-generating article; a first planar spiral coil and a second planar spiral coil arranged in a spaced relationship for heating the aerosol-generating article received in the receiving chamber; Circuitry operatively connects the first planar spiral coil and the second planar spiral coil to control the first planar spiral coil and the second planar spiral coil to simultaneously heat the aerosol-generating article. The aerosol generating system of claim 1, wherein the first planar spiral coil and the second planar spiral coil are arranged in parallel; And/or, the first planar spiral coil and the second planar spiral coil are substantially located on the same plane. The aerosol generating system according to claim 1 or 2, characterized in that the circuit is configured to simultaneously provide an alternating current to the first planar spiral coil and the second planar spiral coil, thereby causing the first planar spiral coil and the second planar spiral coil to simultaneously generate a changing magnetic field to induce heating of the aerosol generating article by induction. The aerosol generating system according to claim 1 or 2, characterized in that the first planar spiral coil and the second planar spiral coil are connected to the circuit in series or in parallel so that the circuit controls the first planar spiral coil and the second planar spiral coil to be heated simultaneously. The aerosol generating system according to claim 1 or 2, wherein a first electrical connector is arranged on the first planar spiral coil, and a second electrical connector is arranged on the second planar spiral coil; the first planar spiral coil and the second planar spiral coil are connected in series between the first electrical connector and the second electrical connector; The circuit is configured to provide current flowing through the first planar spiral coil and the second planar spiral coil simultaneously through the first electrical connector and the second electrical connector, thereby causing the first planar spiral coil and the second planar spiral coil to be heated simultaneously. The aerosol generating system of claim 3, wherein the first planar spiral coil and the second planar spiral coil have parallel axes; The directions of the changing magnetic fields simultaneously generated by the first planar spiral coil and the second planar spiral coil are opposite along the axis. The aerosol generating system according to claim 1 or 2, characterized in that the first planar spiral coil and the second planar spiral coil are arranged on the same side of the receiving cavity. The aerosol-generating system of claim 7, wherein the aerosol-generating article comprises an aerosol-generating substrate; the aerosol-generating substrate is configured to generate an aerosol when heated; The first and second planar helical coils are arranged to simultaneously heat different regions or portions of the aerosol-generating substrate to generate an aerosol. The aerosol generating system according to claim 1 or 2, wherein the receiving chamber comprises a first side and a second side opposite to each other; The first planar spiral coil is arranged on a first side of the receiving cavity, and the second planar spiral coil is arranged on a second side of the receiving cavity. An aerosol generating system according to claim 9, wherein the axes of the first planar spiral coil and the second planar spiral coil are substantially coincident. The aerosol generating system of claim 9, wherein the first planar spiral coil and the second planar spiral coil are configured to generate a changing magnetic field, thereby inducing heating of the aerosol generating article by induction. The aerosol generating system according to claim 11, wherein the heating device further comprises: A first magnetic shielding element is at least partially located on a side of the first planar spiral coil facing away from the receiving cavity, so as to concentrate or distort the changing magnetic field generated by the first planar spiral coil toward the receiving cavity; and/or a second magnetic shielding element is at least partially located on a side of the second planar spiral coil facing away from the receiving cavity, so as to concentrate or distort the changing magnetic field generated by the second planar spiral coil toward the receiving cavity. The aerosol generating system according to claim 1 or 2, wherein the first planar spiral coil and the second planar spiral coil are formed by continuously spirally winding the same wire material. An aerosol generating system, characterized by comprising: A replaceable aerosol-generating article that can be heated to generate an aerosol; Reusable heating device, comprising: a receiving chamber for receiving the aerosol-generating article; At least one planar spiral coil is provided for heating the aerosol-generating article received in the receiving cavity; the planar spiral coil comprises at least a first planar spiral layer and a second planar spiral layer arranged in a stacked manner. The aerosol generating system according to claim 14, wherein the first planar helical layer and the second planar helical layer are formed by continuously spirally winding a same wire. The aerosol generating system according to claim 15, wherein the first planar helical layer and the second planar helical layer are both wound in a clockwise or counterclockwise spiral. An aerosol generating system according to any one of claims 14 to 16, wherein the first planar helical layer and the second planar helical layer are in different planes. The aerosol generating system according to any one of claims 14 to 16, further comprising: The circuit is configured to provide an alternating current to the planar spiral coil so that the first planar spiral layer and the second planar spiral layer generate a changing magnetic field, thereby heating the aerosol generating article by induction; the directions of the magnetic fields generated by the first planar spiral layer and the second planar spiral layer are the same along the axis of the planar spiral coil. A heating device configured to heat 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 first planar spiral coil and a second planar spiral coil arranged in a spaced relationship for heating the aerosol-generating article received in the receiving cavity; Circuitry operatively connects the first planar spiral coil and the second planar spiral coil to control the first planar spiral coil and the second planar spiral coil to simultaneously heat the aerosol-generating article. A heating device configured to heat a substantially sheet-shaped aerosol-generating article to generate an aerosol; characterized in that the heating device comprises: At least one planar spiral coil is provided for heating the aerosol-generating article received in the receiving cavity; the planar spiral coil comprises at least a first planar spiral layer and a second planar spiral layer arranged in a stacked manner. An aerosol generating system, characterized by comprising: A replaceable aerosol-generating article comprising a base and an aerosol-generating substrate; the aerosol-generating substrate being configured to generate an aerosol when heated; the base being configured to be penetrated by a changing magnetic field to generate heat, thereby heating the aerosol-generating substrate; Reusable heating device, comprising: at least one planar helical coil; said at least one magnetic field generator capable of generating a varying magnetic field penetrating said substrate when said aerosol-generating article is received or positioned on said first side; The planar spiral coil has a first direction and a second direction perpendicular to the first direction; the planar spiral coil has a first dimension along the first direction and a second dimension along the second direction; the first dimension is greater than the second dimension. A heating device configured to heat a substantially sheet-shaped aerosol-generating article to generate an aerosol; characterized in that the heating device comprises: At least one planar spiral coil for heating the aerosol-generating product received in the receiving chamber; the planar spiral coil has a first direction and a second direction perpendicular to the first direction; the planar spiral coil has a first dimension along the first direction and a second dimension along the second direction; the first dimension is larger than the second dimension.