CN116268572A

CN116268572A - Gas mist generating device and heater for gas mist generating device

Info

Publication number: CN116268572A
Application number: CN202111569098.9A
Authority: CN
Inventors: 张淑媛; 徐中立; 李永海
Original assignee: Shenzhen FirstUnion Technology Co Ltd
Current assignee: Shenzhen FirstUnion Technology Co Ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2023-06-23

Abstract

The application discloses an aerosol-generating device and a heater for the aerosol-generating device; wherein the aerosol-generating device comprises: a chamber for receiving an aerosol-generating article; a heater comprising a free front end and a rear end, and: a first susceptor having a first section, a second section, and a third section arranged in order from a free front end to a tip end; the maximum outer diameter of the second section is smaller than the maximum outer diameters of the first section and the third section, and a first groove between the first section and the third section is further defined on the surface of the first susceptor; an induction coil is received or held within the first recess and is configured to surround the second section. The above aerosol-generating device is advantageous in terms of miniaturization by forming a recess for accommodating and holding the induction coil in the first susceptor and allowing the induction coil to be accommodated and held in the first susceptor.

Description

Gas mist generating device and heater for gas mist generating device

Technical Field

The embodiment of the application relates to the technical field of aerosol generation, in particular to an aerosol generating device and a heater for the aerosol generating device.

Background

Smoking articles (e.g., cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. Attempts have been made to replace these tobacco-burning products by making products that release the compounds without burning.

An example of such a product is a heating device, as shown in fig. 1, which generates a magnetic field through an induction coil 1 and inductively heats a tobacco product through a susceptor 2 arranged in the coil. The induction coil occupies a large space in such a heating device, which is disadvantageous for miniaturization of the heating device.

Disclosure of Invention

One embodiment of the present application provides an aerosol-generating device for heating an aerosol-generating article to generate an aerosol; comprising the following steps:

a chamber for receiving an aerosol-generating article;

a heater extending at least partially within the chamber and having a free front end and a distal end facing away from the free front end for insertion into an aerosol-generating article to heat the aerosol-generating article, the heater comprising:

a first susceptor configured to extend between the free front end and the distal end and having a first section, a second section, and a third section disposed sequentially along the free front end toward the distal end; the second section having a maximum outer diameter less than the maximum outer diameters of the first and third sections, thereby defining a first groove between the first and third sections at the first susceptor surface; and

an induction coil for generating a varying magnetic field, the induction coil being received or held within the first recess and configured to surround the second section.

In a preferred embodiment, the second section has an extension greater than the extension of the first section and/or the third section.

In a preferred implementation, the heater further comprises: an elongated conductive pin connected to the induction coil for powering the induction coil;

the third section is provided with a second groove which is configured to extend along the axial direction of the first susceptor and end at the tail end; the conductive pin is at least partially received and retained within the second recess.

In a preferred embodiment, the cross section of the wire material of the conductive pins is configured in a flat shape.

In a preferred implementation, the heater further comprises:

a first wire and a second wire connected to the first susceptor; the first and second wires have different materials to form a thermocouple between the first and second wires for sensing the temperature of the first susceptor.

In a preferred embodiment, the third section is provided with a third groove configured to extend in the axial direction of the first susceptor and terminate at the tip; the first and second galvanic wires are at least partially received and retained within the third groove.

In a preferred embodiment, the cross section of the conductor material of the induction coil is configured such that the dimension extending in the axial direction of the induction coil is greater than the dimension extending in the radial direction.

In a preferred implementation, the first groove is annular around the second section.

In a preferred implementation, the heater further comprises:

a base or flange coupled to the third section; the aerosol-generating device provides support for the heater by retaining the base or flange.

In a preferred implementation, the heater further comprises:

a protective layer surrounding and covering an outer surface of the second section to confine at least a portion of the induction coil within the first recess.

In a preferred implementation, the protective layer is opaque and the induction coil is not visible through the protective layer.

In a preferred implementation, the heater further comprises:

a non-susceptor housing or second susceptor surrounds the induction coil and at least partially defines an outer surface of the heater.

Yet another embodiment of the present application also proposes a heater for an aerosol-generating device, the heater being configured as an elongate pin or needle or column or sheet and having free front and rear ends opposite in length; the heater includes:

a first susceptor configured to extend between the free front end and the distal end and having a first section, a second section, and a third section disposed sequentially along the free front end toward the distal end; the second section having a maximum outer diameter less than the maximum outer diameters of the first and third sections, thereby defining a first groove between the first and third sections at the first susceptor surface;

an induction coil for generating a varying magnetic field; the induction coil is received or retained within the first recess and is configured to surround the second section.

Yet another embodiment of the present application also proposes an aerosol-generating device for heating an aerosol-generating article to generate an aerosol; comprising the following steps:

a chamber for receiving an aerosol-generating article;

a heater extending at least partially within the chamber for insertion into an aerosol-generating article to heat the aerosol-generating article; the heater includes a free front end located within the chamber and an end facing away from the free front end, and:

a first susceptor configured to extend between the free front end and the distal end;

an induction coil at least partially surrounding the first susceptor and configured to generate a varying magnetic field; the induction coil is provided with a conductive pin for supplying power to the induction coil;

the first susceptor is provided with a second groove which is configured to extend along the axial direction of the first susceptor and end at the tail end; the conductive pin is at least partially received and retained in the second recess.

Yet another embodiment of the present application also proposes a heater for an aerosol-generating device, the heater being configured as an elongate pin or needle or column or sheet and having free front and rear ends opposite in length; the heater further includes:

The above aerosol-generating device is advantageous in terms of miniaturization by forming a recess for accommodating and holding the induction coil in the first susceptor and allowing the induction coil to be accommodated and held in the first susceptor.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a schematic view of a conventional heating apparatus;

FIG. 2 is a schematic diagram of an aerosol-generating device according to an embodiment of the present disclosure;

FIG. 3 is an exploded view of the heater of FIG. 2, before the parts are assembled;

FIG. 4 is a schematic cross-sectional view of the heater of FIG. 2 from one perspective;

FIG. 5 is a schematic view of a susceptor of yet another embodiment;

FIG. 6 is a schematic diagram of an induction coil of yet another embodiment;

FIG. 7 is a schematic cross-sectional view of the induction coil of FIG. 6 from one perspective;

FIG. 8 is an enlarged view of the second conductive pin of FIG. 6 from one perspective;

FIG. 9 is a schematic view of the susceptor of FIG. 5 from another perspective;

FIG. 10 is an exploded view of a heater according to yet another embodiment from one perspective;

FIG. 11 is a schematic cross-sectional view of the heater of FIG. 10 from one perspective after assembly;

FIG. 12 is an exploded view of a heater according to yet another embodiment from one perspective;

FIG. 13 is a schematic view of a susceptor of another embodiment.

Detailed Description

In order to facilitate an understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and detailed description.

An embodiment of the present application proposes an aerosol-generating device, the configuration of which may be seen in fig. 2 to 4, comprising:

a chamber having an opening 40; in use, an aerosol-generating article a, such as a cigarette, can be removably received within the chamber through the opening 40;

a heater 30 extending at least partially within the chamber and insertable into the aerosol-generating article a received in the chamber; the heater 30 is capable of generating heat under penetration of a varying magnetic field, thereby heating the aerosol-generating article a, such as a cigarette, to volatilize at least one component of the aerosol-generating article a to form an aerosol for inhalation;

a magnetic field generator 32, such as an induction coil, for generating a varying magnetic field under an alternating current;

the battery cell 10 is a chargeable battery cell and can output direct current;

the circuit 20 is connected to the rechargeable battery cell 10 by suitable electrical connection for converting the direct current output from the battery cell 10 into an alternating current of a suitable frequency and supplying it to the magnetic field generator 32 so that the magnetic field generator 32 generates a varying magnetic field.

In a more preferred implementation, the frequency of the alternating current supplied to the induction coil by circuit 20 is between 80KHz and 400KHz; more specifically, the frequency may be in the range of about 200KHz to 300 KHz.

In a preferred embodiment, the DC supply voltage provided by the battery cell 10 is in the range of about 2.5V to about 9.0V, and the amperage of the DC current that the battery cell 10 can provide is in the range of about 2.5A to about 20A.

In a preferred embodiment, the heater 30 is generally in the shape of a pin or needle, which is further advantageous for insertion into the aerosol-generating article a. Meanwhile, the heater 30 may have a length of about 12 to 19 mm, a diameter of 2.0 to 2.6 mm; these heaters 30 may include grade 430 stainless steel (SS 430), grade 420 stainless steel (SS 420), and iron-nickel containing alloy materials (e.g., permalloy) that are penetrable by varying magnetic fields to generate heat.

Further in an alternative implementation, the aerosol-generating article a preferably employs a tobacco-containing material that releases volatile compounds from a matrix upon heating; or may be a non-tobacco material capable of being heated and thereafter adapted for electrical heating for smoking. The aerosol-generating article a preferably employs a solid matrix, which may comprise one or more of powders, granules, shredded strips, ribbons or flakes of one or more of vanilla leaves, tobacco leaves, homogenized tobacco, expanded tobacco; alternatively, the solid substrate may contain additional volatile flavour compounds, either tobacco or non-tobacco, to be released when the substrate is heated.

Referring further to fig. 2-4, the assembled heater 30 is configured as a pin or cylinder or rod or plate extending at least partially within the chamber; the heater 30 includes:

a susceptor 31 configured in a pin or needle or column or bar or sheet shape and having a length of about 12 to 20 mm; the susceptor 31 is made of or at least comprises a sensitive material, and is capable of being penetrated by a changing magnetic field to generate heat in use; the susceptor 31 has a free front end 310 and a rear end 320 opposite in length; the outer shape of the susceptor 31 includes:

the first section 311, proximate the free front end 3110, has a length of about 2.0-3.0 mm; in this preferred embodiment, the outer diameter of the first section 311 is configured to gradually decrease in a direction towards the free front end 3110, thereby tapering the first section 311 and defining a pointed free front end 3110, for insertion into the aerosol-generating article a;

a third section 313, adjacent the end 320, having a length of about 3-5 mm and an outer diameter of about 2-4 mm;

a second section 312 located between the first section 311 and the third section 313; the second section 312 has an outer diameter less than the outer diameter of the third section 313 and less than the maximum outer diameter of the first section 311; specifically, the second section 312 has an outer diameter of about 1.5-2.0 mm, an extension length of 8-15 mm; further, the second section 312 defines a groove 3122 formed on the surface of the substrate 31; of course, the recess 3122 is annular about the second section 312 and is located between the first section 311 and the third section 313.

Further according to fig. 3 and 4, the magnetic field generator 32 of the heater 30 includes:

an induction coil 323, and a first conductive pin 321 and a second conductive pin 322 respectively connected to two ends of the induction coil 323. In use, the first conductive pin 321 and the second conductive pin 322 are connected to the circuit 20, and thereby an alternating current is supplied to the induction coil 323 via the first conductive pin 321 and the second conductive pin 322 such that the induction coil 323 generates an alternating magnetic field.

Further, the induction coil 323 is received and held in the recess 3122 and surrounds the second section 312; the induction coil 323 has about 6 to 20 turns and an extension length of about 8 to 12 mm. And the induction coil 323 has an inner diameter of about 1.5 to 2.0mm and an outer diameter of about 2.0 to 2.6 mm.

In particular implementations, the inductive coil 323 has a first end proximate the free front end 310 and a second end proximate the end 320; the first conductive pin 321 is connected to a first end of the induction coil 323 and extends from the first end to a second end outside the induction coil 323; the second conductive pin 322 is connected to a second end of the induction coil 323.

In some alternative implementations, the length of the inductive coil 323 is substantially the same fit as the recess 3122; the first end of the induction coil 323 is against the first section 311 and the second end is against the third section 313 after assembly. And, the induction coil 323 is substantially matched to the length and depth of the recess 3122; the assembled induction coil 323 is substantially flush with the surfaces of the first section 311 and the third section 313, at least after assembly the induction coil 323 does not significantly protrude or be in a recessed configuration relative to the surfaces of the first section 311 and the third section 313.

In some conventional implementations, the wire material of the induction coil 323 is a wire material that is circular in cross-section. The wire material of the induction coil 323 includes gold, silver, copper, nickel or alloy materials containing the same with low resistivity or copper silver plating, nickel silver plating, etc. The first conductive pin 321 and the second conductive pin 322 are also made of the above low-resistivity material. In some implementations, the first conductive pin 321 and the second conductive pin 322 are formed from an elongated wire wound into an excess portion of the two ends of the inductive coil 323.

And in an alternative implementation, the inductive coil 323 is insulated from the susceptor 31. In some implementations, the induction coil 323 is provided with a surface insulation layer, such as an induction coil 323 made of enameled wire, etc., to keep the induction coil 323 insulated from the susceptor 31; alternatively, in a further alternative embodiment, an insulating layer may be formed on the surface of susceptor 31, and then induction coil 323 may be wound so as to maintain insulation between them.

And the heater 30 further includes a temperature sensor for sensing the temperature of the sensing body 31; in the implementations of fig. 2-4, the temperature sensor includes:

a first wire 341 and a second wire 342 connected to the susceptor 31; and the first and

second wires

341 and 342 are respectively made of different wire materials, so that a thermocouple for detecting the temperature of the susceptor 31 can be formed therebetween. For example, the first thermocouple wire 341 and the second thermocouple wire 342 are made of two different materials of nickel, nickel-chromium alloy, nickel-silicon alloy, nickel-chromium-copper alloy, bronze alloy, iron-chromium alloy and other thermocouple materials.

In the embodiment shown in fig. 3, the first galvanic wire 341 is connected to the susceptor 31 at the first connection position B1 on the susceptor 31 by welding or the like; the second galvanic wire 342 is connected to the susceptor 31 by welding or the like at a second connection position B2 on the susceptor 31.

In the preferred embodiment of the figure, the first connection position B1 and the second connection position B2 are substantially in the highest region of the susceptor 31. Specifically, the distance between the first connection position B1 and/or the second connection position B2 and the free front end 310 of the susceptor 31 is between one third and one half of the length of the susceptor 31. Or in yet other variations, the first connection location B1 and the second connection location B2 are disposed proximate to the third section 313 and distal to the first section 3130.

And,

grooves

3131 and 3132 extending in the axial direction are also provided on the surface of the third section 313 of the susceptor 31. In assembly, first conductive pin 321 of induction coil 323 passes through recess 3131 and extends beyond end 320; and, a second conductive pin 322 of the inductive coil 323 passes through the recess 3132 and extends beyond the end 320; is advantageous for connection to the circuit 20. After assembly, the first conductive pin 321 is at least partially restrained and received within the recess 3131, and the second conductive pin 322 is at least partially restrained and received within the recess 3132.

And,

grooves

3133 and 3134 extending in the axial direction are also provided on the surface of the third section 313 of the susceptor 31. In assembly, first wire 341 extends through recess 3133 and beyond end 320 to connect to circuit 20; the second wire 342 passes through the recess 3134 and extends out of the end 320 to connect with the circuit 20. After assembly, the first wire 341 is at least partially restrained and received within the recess 3133, and the second wire 342 is at least partially restrained and received within the recess 3134.

Further in the above implementation, the

grooves

3131 and 3132 are adapted to the shape of the first conductive pin 321 and the second conductive pin 322, respectively; the first conductive pin 321 and the second conductive pin 322 are substantially flush with the surface of the third section 313 when assembled.

And in the above implementation,

grooves

3131, 3132, 3133, and 3134 are spaced apart along the circumference of third section 313. The

grooves

3131 and 3132 are disposed opposite in the radial direction of the third section 313; and

grooves

3133 and 3134 are disposed opposite in the radial direction of the third section 313.

Further referring to fig. 2 to 4, the heater 30 further includes:

a base or flange 35, the base or flange 35 being wrapped around, mounted or positioned on the third section 313, the aerosol-generating device may be held by clamping or holding the base or flange 35, thereby enabling the heater 30 to be held stably within the aerosol-generating device. In the figures the base or flange 35 is PEEK, a ceramic such as ZrO ₂ Ceramics and Al ₂ O ₃ Ceramic, etc. In preparation, the base or flange 35 is secured to the third section 313 by high temperature adhesive bonding, molding, such as in-mold injection molding, or welding. Further according to the illustration, the inner diameter of the base or flange 35 is greater than the outer diameter of the third section 313.

And further referring to fig. 4, the heater 30 further includes:

a protective layer 33 formed or coated on the outer surface of susceptor 31. The induction coil 323 is confined in the recess 3122 by the protective layer 33 and forms a protection for the exposed surfaces of the induction coil 323 and the susceptor 31. In some implementations, the protective layer 33 may include an inorganic non-metallic material, such as an oxide (e.g., mgO, siO ₂ 、Al ₂ O ₃ 、B ₂ O ₃ Etc.), nitride (Si ₃ N ₄ 、B ₃ N ₄ 、Al ₃ N ₄ Etc.), or other highly thermally conductive composite ceramic materials.

In some implementations, protective layer 33 may be formed on the surfaces of susceptor 31 and induction coil 323 by spraying or deposition, or the like. In one particular implementation, the protective layer 33 is a ceramic film or glass frit.

Or in yet other alternative implementations, the protective layer 33 is a paste or slurry-like feed having suitable fluidity by adding the raw materials with organic auxiliaries; then casting the feed material into a thin film, such as 10-100 μm, by a casting process; then, the film is wound around the susceptor 31 having the induction coil 323, and the wound film is cured by heating, drying, sintering, or the like to form the protective layer 33.

Further, the protective layer 33 is formed by spraying or deposition or the like, and the surface of the heater 30 is smoothly flattened, which is advantageous in preventing adhesion and deposition of organic matters, residues or the like of the aerosol-generating article a on the surface of the heater 30. Further in a more preferred implementation, the protective layer 33 is of a non-transparent material, such as black glaze; the induction coil 323 covered or covered by the protective layer 33 is not visible from through the protective layer 33.

In some typical implementations, the coating 33 has a thickness of about 50-200 μm. Or in yet other variations, the coating 33 is a highly thermally conductive material for soaking, e.g., the thermal conductivity of the highly thermally conductive coating material is typically greater than 50W/mK; the material may be carbide such as silicon carbide/aluminum carbide, nitride such as calcium nitride/aluminum nitride, carbonaceous body, metal film, etc.; preferably a coating of material having a thermal conductivity greater than 100W/mK. The temperature of the surface in the heater 30 is made substantially uniform during operation by the coating 33 of highly thermally conductive material.

And or in yet other implementations, the susceptor 31, the first and second

galvanic wires

341 and 342, and the induction coil 323 and the first and second

conductive pins

321 and 322 may each have an insulating layer on their surfaces to increase the reliability of the insulation, i.e., the risk of shorting between each other. For example, ceramic coatings may be deposited by PVD, thermal spray (plasma-containing, supersonic spray) ceramic coatings such as alumina, alumina-titania composites, silicon dioxide-and carbon-containing ceramic materials, and the like, forming an insulating layer on their surfaces to insulate them from each other.

Or referring to fig. 5 to 9, there is shown a schematic diagram of a heater 30 of yet another alternative embodiment, in which the heater 30 includes:

the susceptor 31a, the third section 313a of the susceptor 31a has axially extending

grooves

3131a, 3132a, 3133a and 3134a thereon;

the magnetic field generator 32a includes an induction coil 323a surrounding the second section 312a of the susceptor 31 a; the cross-sectional shape of the wire material of the induction coil 323a is a wide or flat shape other than a conventional circular shape. For example, the cross section of the wire material of the induction coil 323a has a dimension extending in the axial direction that is larger than a dimension extending in the radial direction, so that the induction coil 323a takes a flat rectangular shape.

Briefly, the induction coil 323a of the above construction is completely or at least flattened in the form of a wire material, as compared to a conventional helical heating coil formed of a circular cross-section wire. Thus, the wire material extends in the radial direction to a lesser extent. By this measure, the energy loss in the induction coil 323a can be reduced. In particular, heat transfer can be promoted.

The above preferably, the cross section of the induction coil 323a has a rectangular shape, forming the entire cross section of the induction coil 323 a. In these embodiments, the induction coil 323a is spirally formed of a wire material having a rectangular cross section, thereby forming a spiral-shaped flat coil that is easy to manufacture. After the reduced energy loss, it has the additional advantage of minimizing the outer diameter, which allows the outer diameter size range of the heating element 32a to be prepared to be advantageous.

Similarly, the first conductive pin 321a connected to the first end of the induction coil 323a and the second conductive pin 322a connected to the second end of the induction coil 323a are made of a conductive wire material having a flat or rectangular cross section. As shown in fig. 8, for example, the first conductive pin 321a has a first extension dimension d1 along the circumferential direction of the magnetic field generator 32a, and has a second extension dimension d2 extending along the radial direction of the magnetic field generator 32 a; the first extension d1 is greater than the second extension d2; specifically, the first extension d1 is about 1 to 3mm, and the second extension d2 is about 0.1 to 1mm.

Then, adaptively, the

grooves

3131a and 3132a are arranged in a flat shape.

Further fig. 10 and 11 show schematic diagrams of a heater 30b of yet another embodiment, the heater 30b of which includes:

the non-sensitive shell or susceptor 33b is in the form of a pin or needle or column with a hollow 331 b; the free front end 310b of the heater 30b is defined by the tapered tip of the non-susceptor shell or susceptor 33b after assembly, and the end 320b of the heater 30b is defined by the other end of the non-susceptor shell or susceptor 33b facing away from the tapered tip;

the susceptor 31b and the magnetic field generator 32b are both housed and held within a hollow 331b of a non-receptive shell or susceptor 33 b;

the first thermocouple wire 341b and the second thermocouple wire 342b are connected to the susceptor 31b by welding or the like, and are further used for sensing the temperature of the susceptor 31 b;

a base or flange 35b surrounds and engages the surface of the non-receptive shell or susceptor 33b adjacent the end 320 b.

Wherein, the non-sensitive shell 33b can be ceramic, quartz, inorganic oxide (such as MgO, siO) with good heat conductivity ₂ 、Al ₂ O ₃ 、B ₂ O ₃ Etc.), nitride (Si ₃ N ₄ 、B ₃ N ₄ 、Al ₃ N ₄ Etc.) and the like, and the aerosol-generating article a is heated merely by conduction of the heat of the susceptor 31 b. Or in yet other implementations, susceptor 33b is made of a susceptor material, such as stainless steel; in practice, the susceptor 33b, while receiving the heat of the susceptor 31b, can also be penetrated by the magnetic field of the magnetic field generator 32b to generate heat to heat the aerosol-generating article a.

Or further figure 12 shows a schematic view of a heater 30c of yet another embodiment; the heater 30c of this embodiment includes:

a susceptor 31b in the form of pins or needles; having a first section 311c, a second section 312c, and a third section 313c arranged in order along the length direction; the first section 311c is in the shape of a tapered tip, whereby the free front end 310c of the heater 30c is defined by the first section 311c after assembly; the second section 312c is rod-shaped with a substantially constant outer diameter; the third section 313c has a larger outer diameter than the second section 312c and defines an end 320c of the heater 30c by the third section 313c;

the magnetic field generator 32c is disposed about the second section 312c and the first conductive pin 321c and the second conductive pin 322c extend beyond the end 320c through the recess in the third section 313c for convenient connection to the circuit 20;

a housing or susceptor 33c having a tubular shape extending along the longitudinal direction of the heater 30 c; after assembly, the housing or susceptor 33c surrounds and encloses the magnetic field generator 32c; and, the end of the housing or susceptor 33c near the free front end 310c is abutted against the first section 311 c.

After assembly, first section 311c of susceptor 31c is exposed outside of housing or susceptor 33 c; the outer surface of the first section 311c of susceptor 31c and the outer surface of the housing or susceptor 33c together define the exterior of heater 30 c.

And a base or flange 34c that, when assembled, surrounds and is bonded to the housing or susceptor 33c near the end 320 c.

Or in yet other variations, the housing or susceptor 33c has a shorter extension; after assembly, the housing or susceptor 33c completely surrounds only the magnetic field generator 32c and the second section 312c of the susceptor 31b, and the third section 313c of the susceptor 31b is at least partially exposed outside the housing or susceptor 33 c; and then the base or flange 34c surrounds and is bonded to a third section 313c exposed outside the housing or susceptor 33 c.

Or FIG. 13 shows a schematic view of a susceptor 31d of yet another alternative embodiment; the susceptor 31d has a tapered first section 311d, and an elongated rod-shaped second section 312d.

Grooves

3131d, 3132d, 3133d, and 3134d are formed on the second section 312d near the tip end, and extend in the axial direction. The

grooves

3131d, 3132d, 3133d and 3134d have a length of about 3 to 5mm, and are used for accommodating and holding conductive pins or wires inside the

grooves

3131d, 3132d, 3133d and 3134d, and extend outside the tip.

It should be noted that the description and drawings of the present application show preferred embodiments of the present application, but are not limited to the embodiments described in the present application, and further, those skilled in the art can make modifications or changes according to the above description, and all such modifications and changes should fall within the scope of the appended claims.

Claims

1. An aerosol-generating device for heating an aerosol-generating article to generate an aerosol; characterized by comprising the following steps:

a chamber for receiving an aerosol-generating article;

2. The aerosol-generating device according to claim 1, wherein the second section has an extension greater than the extension of the first and/or third section.

3. The aerosol-generating device of claim 1 or 2, wherein the heater further comprises: an elongated conductive pin connected to the induction coil for powering the induction coil;

4. The aerosol-generating device of claim 3, wherein a cross-section of the wire material of the conductive pin is configured to be flat.

5. The aerosol-generating device of claim 1 or 2, wherein the heater further comprises:

6. The aerosol-generating device of claim 5, wherein the third section is provided with a third groove configured to extend in an axial direction of the first susceptor and terminate at the tip; the first and second galvanic wires are at least partially received and retained within the third groove.

7. An aerosol-generating device according to claim 1 or 2, wherein the cross-section of the wire material of the induction coil is configured such that the dimension extending in the axial direction of the induction coil is greater than the dimension extending in the radial direction.

8. An aerosol-generating device according to claim 1 or 2, wherein the first recess is annular about the second section.

9. The aerosol-generating device of claim 1 or 2, wherein the heater further comprises:

10. The aerosol-generating device of claim 1 or 2, wherein the heater further comprises:

11. The aerosol-generating device of claim 10, wherein the protective layer is opaque and the induction coil is not visible through the protective layer.

12. The aerosol-generating device of claim 1 or 2, wherein the heater further comprises:

13. A heater for an aerosol-generating device, the heater being configured as an elongate pin or needle or cylinder or sheet and having free front and rear ends facing away from each other in a length direction; the heater includes:

14. An aerosol-generating device for heating an aerosol-generating article to generate an aerosol; characterized by comprising the following steps:

a chamber for receiving an aerosol-generating article;

a heater extending at least partially within the chamber and having a free front end and a distal end facing away from the free front end for insertion into an aerosol-generating article to heat the aerosol-generating article; the heater includes:

15. A heater for an aerosol-generating device, the heater being configured as an elongate pin or needle or cylinder or sheet and having free front and rear ends facing away from each other in a length direction; the heater further includes: