CN116268572A - Aerosol generating device and heater for aerosol generating device - Google Patents

Abstract

The present application discloses an aerosol generating device and a heater for the aerosol generating device; wherein the aerosol generating device includes: a chamber for receiving an aerosol generating product; a heater including a free front end and a free end, and: The first receptor has a first section, a second section and a third section arranged in sequence along the free front end toward the end; the maximum outer diameter of the second section is smaller than the maximum outer diameter of the first section and the third section diameter, thereby defining a first groove between the first section and the third section on the surface of the first susceptor; the induction coil is accommodated or held in the first groove, and is configured to surround the second area part. The above aerosol generating device is advantageous for miniaturization by forming a groove for accommodating and maintaining the induction coil on the first receptor, and making the induction coil accommodated and retained on the first receptor.

Description

Aerosol generating device and heater for aerosol generating device

technical field

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

Background technique

Smoking articles (eg, 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 compounds without burning them.

An example of this type of product is a heating device. As shown in FIG. 1 , a magnetic field is generated by an induction coil 1 , and a susceptor 2 arranged in the coil induces heat to heat tobacco products. The induction coil in this type of heating device occupies a large space, which is unfavorable for the miniaturization of the heating device.

Contents of the invention

One embodiment of the present application provides an aerosol generating device for heating an aerosol generating product to generate an aerosol; comprising:

a chamber for receiving an aerosol-generating article;

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

The first receptor is configured to extend between the free front end and the end, and has a first section, a second section, and a third section arranged in sequence along the free front end toward the end; the second The maximum outer diameter of the section is smaller than the maximum outer diameter of the first section and the third section, thereby defining a first section between the first section and the third section on the surface of the first susceptor. groove; and

An induction coil for generating a changing magnetic field, the induction coil is housed or held in the first groove and configured to surround the second section.

In a preferred implementation, the extension length of the second section is greater than the extension length of the first section and/or the third section.

In a preferred implementation, the heater further includes: an elongated conductive pin connected to the induction coil for supplying power to the induction coil;

The third section is provided with a second groove configured to extend axially along the first susceptor and terminate at the end; the conductive pin is at least partially accommodated and retained in the second susceptor. inside the groove.

In a preferred implementation, the cross-section of the wire material of the conductive pin is configured as a flat shape.

In a preferred implementation, the heater also includes:

The first galvanic wire and the second galvanic wire are connected to the first receptor; the first galvanic wire and the second galvanic wire have different materials, so that the first galvanic wire and the second galvanic wire have different materials. A thermocouple for sensing the temperature of the first receptor is formed between the two galvanic wires.

In a preferred implementation, the third section is provided with a third groove configured to extend along the axial direction of the first susceptor and terminate at the end; the first galvanic wire and the second The two galvanic wires are at least partially accommodated and held in the third groove.

In a preferred implementation, the cross section of the wire material of the induction coil is configured such that the dimension extending along the axial direction of the induction coil is larger than the dimension extending along the radial direction.

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

In a preferred implementation, the heater also includes:

A base or a flange is combined with the third section; the aerosol generating device supports the heater by holding the base or the flange.

In a preferred implementation, the heater also includes:

A protective layer surrounds and covers the outer surface of the second section to confine at least part of the induction coil within the first groove.

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

In a preferred implementation, the heater also includes:

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

Yet another embodiment of the present application also proposes a heater for an aerosol generating device, the heater is configured as an elongated pin or needle or column or sheet, and has a free space opposite to each other along the length direction. front end and end; said heater includes:

The first receptor is configured to extend between the free front end and the end, and has a first section, a second section, and a third section arranged in sequence along the free front end toward the end; the second The maximum outer diameter of the section is smaller than the maximum outer diameter of the first section and the third section, thereby defining a first section between the first section and the third section on the surface of the first susceptor. groove;

An induction coil is used to generate a changing magnetic field; the induction coil is accommodated or held in the first groove and configured to surround the second section.

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

a chamber for receiving an aerosol-generating article;

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

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

An induction coil at least partially surrounds the first susceptor and is configured to generate a changing magnetic field; conductive pins are provided on the induction coil for powering the induction coil;

The first susceptor is provided with a second groove, the second groove is configured to extend along the axial direction of the first susceptor and terminate at the end; the conductive pin at least partially accommodates and holds in the second groove.

Yet another embodiment of the present application also proposes a heater for an aerosol generating device, the heater is configured as an elongated pin or needle or column or sheet, and has a free space opposite to each other along the length direction. front end and end; said heater also includes:

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

An induction coil at least partially surrounds the first susceptor and is configured to generate a changing magnetic field; conductive pins are provided on the induction coil for powering the induction coil;

The first susceptor is provided with a second groove, the second groove is configured to extend along the axial direction of the first susceptor and terminate at the end; the conductive pin at least partially accommodates and holds in the second groove.

The above aerosol generating device is advantageous for miniaturization by forming a groove for accommodating and maintaining the induction coil on the first receptor, and making the induction coil accommodated and retained on the first receptor.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute a limitation to the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the drawings are not limited to scale.

Fig. 1 is the structural representation of existing heating device;

Fig. 2 is a schematic structural diagram of an aerosol generating device provided by an embodiment of the present application;

Fig. 3 is an exploded schematic view of each part of the heater in Fig. 2 before assembly;

Fig. 4 is a schematic cross-sectional view of a viewing angle of the heater in Fig. 2;

Figure 5 is a schematic diagram of a receptor in yet another embodiment;

Fig. 6 is a schematic diagram of an induction coil in another embodiment;

Fig. 7 is a schematic cross-sectional view of a viewing angle of the induction coil in Fig. 6;

Fig. 8 is an enlarged view of a viewing angle of the second conductive pin in Fig. 6;

Fig. 9 is a schematic diagram of another perspective of the receptor in Fig. 5;

Fig. 10 is an exploded schematic diagram of a viewing angle of a heater according to yet another embodiment;

Fig. 11 is a schematic cross-sectional view of a viewing angle after the heater in Fig. 10 is assembled;

Fig. 12 is an exploded schematic diagram of a viewing angle of a heater according to yet another embodiment;

Fig. 13 is a schematic diagram of a receptor according to yet another embodiment.

Detailed ways

In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific implementation methods.

An embodiment of the present application proposes an aerosol generating device, the structure of which can be seen from Figure 2 to Figure 4, including:

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

The heater 30 extends at least partly in the chamber, and can be inserted into the aerosol generating product A received in the chamber; the heater 30 can be penetrated by a changing magnetic field to generate heat, and then the aerosol generating product A, such as a cigarette, can be heated. heating to volatilize at least one component of the aerosol-generating article A to form an aerosol for inhalation;

The magnetic field generator 32, such as an induction coil, is used to generate a changing magnetic field under an alternating current;

The cell 10 is a rechargeable DC cell that can output DC current;

The circuit 20 is connected to the rechargeable battery core 10 through a suitable electrical connection, and is used to convert the DC current output by the battery core 10 into an alternating current with a suitable frequency and then supply it to the magnetic field generator 32, so that the magnetic field generator 32 to generate a changing magnetic field.

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

In a preferred embodiment, the DC power 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 provided by the battery cell 10 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 in turn is advantageous for insertion into the aerosol-generating article A. As shown in FIG. Meanwhile, the heaters 30 may have a length of about 12-19 mm and a diameter of 2.0-2.6 mm; these heaters 30 may include grade 430 stainless steel (SS430), may also include grade 420 stainless steel (SS420), and iron-containing Nickel alloy materials (such as permalloy) can be penetrated by a changing magnetic field and generate heat.

Further in an optional implementation, the aerosol-generating product A preferably uses a tobacco-containing material that releases volatile compounds from the matrix when heated; or it can also be a non-tobacco material that is suitable for electric heating and smoking after heating. The aerosol-generating product A preferably adopts a solid substrate, which may include one or more of powder, granules, shredded strips, strips or flakes of one or more of vanilla leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; Alternatively, the solid matrix may contain additional tobacco or non-tobacco volatile flavor compounds to be released when the matrix is heated.

Further referring to Fig. 2 to Fig. 4, after assembly, the heater 30 is configured as a pin or needle or column or rod or sheet extending at least partially in the chamber; the heater 30 includes:

The receptor 31 is configured in the shape of a pin or a needle or a column or a rod or a sheet, and has a length of about 12 to 20 mm; the receptor 31 is made of a sensitive material or at least includes a sensitive material, and can be used in use. The changing magnetic field penetrates and generates heat; the susceptor 31 has a free front end 310 and an end 320 opposite along the length direction; the shape and structure of the susceptor 31 includes:

The first section 311, near the free front end 3110, has a length of about 2.0-3.0mm; in this preferred implementation, the outer diameter of the first section 311 is configured to gradually decrease along the direction near the free front end 3110, and then It is advantageous for insertion into the aerosol-generating article A that the first section 311 has a conical shape and delimits a pointed free front end 3110;

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

The second section 312 is located between the first section 311 and the third section 313; the outer diameter of the second section 312 is smaller than the outer diameter of the third section 313, and is smaller 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 and an extension length of 8-15 mm; furthermore, the second section 312 defines a groove 3122 formed on the surface of the base body 31; of course, the concave The groove 3122 is annular around the second section 312 and is located between the first section 311 and the third section 313 .

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

The induction coil 323 , and the first conductive pin 321 and the 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 then an alternating current is provided to the induction coil 323 through the first conductive pin 321 and the second conductive pin 322 to cause the induction coil 323 to generate alternating magnetic field.

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

In specific implementation, the induction coil 323 has a first end close to the free front end 310, and a second end close to the end 320; The first end extends to the second end; the second conductive pin 322 is connected to the second end of the induction coil 323 .

In some optional implementations, the length of the induction coil 323 is substantially the same as the groove 3122; then after assembly, the first end of the induction coil 323 is against the first section 311, and the second end is against the third section 313 . And, the induction coil 323 basically matches the length and depth of the groove 3122; the induction coil 323 is basically flush with the surfaces of the first section 311 and the third section 313 after assembly, at least after assembly The coil 323 does not protrude significantly relative to the surfaces of the first section 311 and the third section 313 or is in a concave shape.

In some conventional implementations, the wire material of the induction coil 323 is a wire material with a circular cross section. The wire material of the induction coil 323 includes low-resistivity gold, silver, copper, nickel or alloy materials containing them, or copper plated with silver, nickel plated with silver, 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 by redundant parts at both ends of a long and thin wire wound into the induction coil 323 .

And in an optional implementation, the induction coil 323 and the susceptor 31 are insulated. In some specific implementations, the induction coil 323 has a surface insulating layer, for example, the induction coil 323 made of enameled wire keeps the insulation between the induction coil 323 and the receptor 31; An insulating layer may be formed on the surface of the susceptor 31 and then the induction coil 323 is wound to keep insulation between them.

And the heater 30 also includes a temperature sensor for sensing the temperature of the receptor 31; in the implementation of Fig. 2 to Fig. 4, the temperature sensor includes:

The first galvanic wire 341 and the second galvanic wire 342 connected to the receptor 31; A thermocouple for detecting the temperature of the susceptor 31 may be formed. For example, the first galvanic wire 341 and the second galvanic wire 342 are made of two different materials of galvanic materials such as nickel, nickel-chromium alloy, nickel-silicon alloy, nickel-chromium-copper, consonant bronze, and iron-chromium alloy. of.

In the specific implementation shown in FIG. 3 , the first galvanic wire 341 is connected to the receptor 31 by means of welding or the like at the first connection position B1 on the receptor 31; The second connection position B2 is connected to the receptor 31 by means of welding or the like.

In the preferred implementation in the figure, the first connection position B1 and the second connection position B2 are basically located in the highest area of the receptor 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 receptor 31 is between one third and one half of the length of the receptor 31 . Or in still some implementation changes, the first connection position B1 and the second connection position B2 are arranged close to the third section 313 and away from the first section 3130 .

And, grooves 3131 and 3132 extending in the axial direction are further provided on the surface of the third section 313 of the susceptor 31 . In assembly, the first conductive pin 321 of the induction coil 323 passes through the groove 3131 and extends out of the end 320; and the second conductive pin 322 of the induction coil 323 passes through the groove 3132 and extends out of the end 320; It is advantageous for connection with the circuit 20 . After assembly, the first conductive pin 321 is at least partially constrained and accommodated in the groove 3131 , and the second conductive pin 322 is at least partially constrained and accommodated in the groove 3132 .

And, a groove 3133 and a groove 3134 extending in the axial direction are further provided on the surface of the third section 313 of the susceptor 31 . During assembly, the first galvanic wire 341 passes through the groove 3133 and extends out of the end 320 to connect with the circuit 20 ; the second galvanic wire 342 passes through the groove 3134 and extends out of the end 320 to connect with the circuit 20 . After assembly, the first galvanic wire 341 is at least partially constrained and contained within the groove 3133 , and the second galvanic wire 342 is at least partially constrained and contained within the groove 3134 .

Further in the above implementation, the groove 3131 and the groove 3132 are adapted to the shapes of the first conductive pin 321 and the second conductive pin 322 respectively; after assembly, the first conductive pin 321 and the second conductive pin 322 is substantially flush with the surface of the third section 313 .

And in the above implementation, the grooves 3131 , the grooves 3132 , the grooves 3133 and the grooves 3134 are arranged at intervals along the circumference of the third section 313 . The groove 3131 and the groove 3132 are arranged oppositely along the radial direction of the third section 313 ; and the groove 3133 and the groove 3134 are arranged oppositely along the radial direction of the third section 313 .

Further according to Fig. 2 to Fig. 4, the heater 30 also includes:

base or flange 35, the base or flange 35 is surrounded, installed or positioned on the third section 313, then the aerosol generating device can clamp or hold the base or flange 35, and then make the The heater 30 can be held stably within the aerosol generating device. In the figure, the base or flange 35 is made of heat-resistant materials such as PEEK, ceramics such as ZrO ₂ ceramics and Al ₂ O ₃ ceramics. In terms of production, the base or flange 35 is fixed on the third section 313 by high temperature adhesive bonding, molding such as in-mold injection molding, or welding. As further shown in the figures, the inner diameter of the base or flange 35 is larger than the outer diameter of the third section 313 .

And further referring to shown in Figure 4, the heater 30 also includes:

The protective layer 33 is formed or covered on the outer surface of the susceptor 31 . The protective layer 33 limits the induction coil 323 in the groove 3122 and protects the exposed surface of the induction coil 323 and the susceptor 31 . In some implementations, the protective layer 33 may include inorganic non-metallic materials such as oxides (such as MgO, SiO ₂ , Al ₂ O ₃ , B ₂ O _{3 ,} etc.), nitrides (Si ₃ N ₄ , B ₃ N ₄ , Al ₃ N ₄ , etc.) and other insulating materials, or other high thermal conductivity composite ceramic materials.

In some implementations, the protective layer 33 may be formed on the surfaces of the susceptor 31 and the induction coil 323 by spraying or depositing. In a specific implementation, the protective layer 33 is a ceramic film or a glass glaze layer.

Or in some other optional implementations, the protective layer 33 is formed by adding organic additives to the raw materials to make a paste-like or slurry-like feed with suitable fluidity; then the feed is cast through a casting process A thinner membrane, such as 10-100 μm; and then the membrane is wound outside the susceptor 31 with the induction coil 323 , and the wound membrane is cured by heating and drying or sintering to form the protective layer 33 .

Further, the protective layer 33 is formed by spraying or depositing, and the surface of the heater 30 is smooth and smooth, which is beneficial for preventing the adhesion and deposition of organic matters and residues of the aerosol generating product A on the surface of the heater 30 . Further in a more preferred implementation, the protective layer 33 is made of non-transparent material, such as black glaze; the induction coil 323 covered or covered by the protective layer 33 is not visible through the protective layer 33 .

In some typical implementations, coating 33 has a thickness of about 50-200 μm. Or in the implementation of some other changes, the coating 33 is a high thermal conductivity material for uniform heat, for example, the thermal conductivity of the high thermal conductivity coating material is generally greater than 50W/mK; the material can be carbide such as silicon carbide/aluminum carbide, Nitride, such as calcium nitride/aluminum nitride, carbon body, metal film, etc.; the coating of materials with a thermal conductivity greater than 100W/mK is preferred. Through the coating 33 of high thermal conductivity material, the temperature of the surface of the heater 30 is substantially uniform during operation.

And or in some other implementations, the surface of the susceptor 31, the first galvanic wire 341 and the second galvanic wire 342, as well as the induction coil 323 and the first conductive pin 321 and the second conductive pin 322 may have Insulation layers to increase insulation reliability, i.e. the risk of them shorting to each other. For example, ceramic coatings can be deposited by PVD, thermal spraying (including plasma spraying, supersonic spraying) ceramic coatings, such as alumina, alumina and titanium dioxide composites, silicon dioxide, ceramic materials containing silicon oxygen and carbon, etc. An insulating layer is formed on their surfaces to insulate them from each other.

Or refer to Fig. 5 to Fig. 9, which shows a schematic diagram of a heater 30 in another variation embodiment, in which the heater 30 in this embodiment includes:

The receptor 31a, the third section 313a of the receptor 31a has an axially extending groove 3131a, groove 3132a, groove 3133a and groove 3134a;

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

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

Preferably, the cross section of the induction coil 323a has a rectangular shape, forming the entire cross section of the induction coil 323a. In these embodiments, the induction coil 323a is helically formed from a wire material having a rectangular cross-section, whereby forming a helical flat coil is easy to manufacture. This has the additional advantage of minimizing the outer diameter, after the reduced energy loss, which allows a range of outer diameter sizes for the heating element 32a to be manufactured which is 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 also made of flat or rectangular wire material. For example, as shown in FIG. 8, 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 32a; An extension dimension d1 is greater than the second extension dimension d2; specifically, the first extension dimension d1 is about 1-3 mm, and the second extension dimension d2 is about 0.1-1 mm.

Adaptively, the groove 3131a and the groove 3132a are arranged in a flat shape.

Further, Fig. 10 and Fig. 11 show a schematic diagram of a heater 30b in another embodiment, the heater 30b in this embodiment includes:

The non-sensitivity shell or receptor 33b is a pin or needle-like or columnar shape with a hollow 331b; after assembly, the free front end 310b of the heater 30b is defined by the non-sensitivity shell or the tapered tip of the receptor 33b, and the non-sensitivity The other end of the susceptor shell or susceptor 33b facing away from the tapered tip defines the end 320b forming the heater 30b;

The susceptor 31b and the magnetic field generator 32b are accommodated and held in the non-sensitivity shell or the hollow 331b of the susceptor 33b;

The first galvanic wire 341b and the second galvanic wire 342b are connected to the receptor 31b by means of welding or the like, and then used to sense the temperature of the receptor 31b;

A base or flange 35b surrounds and engages the surface of the non-responsive housing or susceptor 33b near the end 320b.

Among them, in some implementations, the non-sensitive shell 33b can be made of ceramics, quartz, inorganic oxides (such as MgO, SiO ₂ , Al ₂ O ₃ , B ₂ O ₃ , etc.), nitrides (Si ₃ N ₄ , B ₃ N ₄ , Al ₃ N _{4 ,} etc.), the product A is generated by heating the aerosol only by conducting the heat of the receptor 31b. Or in some implementations, the susceptor 33b is made of a susceptibility material, such as stainless steel; then in implementation, the susceptor 33b can also be penetrated by the magnetic field of the magnetic field generator 32b while receiving the heat of the susceptor 31b And generate heat to generate product A by heating the aerosol.

Or further Fig. 12 shows a schematic diagram of a heater 30c in another embodiment; the heater 30c of this embodiment includes:

The receptor 31b is in the shape of a pin or a needle; it has a first segment 311c, a second segment 312c and a third segment 313c arranged in sequence along the length direction; the first segment 311c is in the shape of a tapered tip, and then After assembly, the free front end 310c of the heater 30c is bounded by the first section 311c; the second section 312c is in the shape of a rod with a substantially constant outer diameter; the outer diameter of the third section 313c is larger than that of the second section 312c, and is formed by the third Section 313c defines an end 320c of heater 30c;

The magnetic field generator 32c is arranged around the second section 312c, and the first conductive pin 321c and the second conductive pin 322c extend to the outside of the end 320c after passing through the groove on the third section 313c, which is suitable for connecting with the circuit 20 convenient;

Housing or susceptor 33c, is the tubular shape that extends along the length direction of heater 30c; After assembly, housing or susceptor 33c surrounds and encloses magnetic field generator 32c; And, the end of housing or susceptor 33c near free front end 310c is against the first section 311c.

After assembly, the first section 311c of the receptor 31c is exposed outside the shell or the receptor 33c; it is jointly defined by the outer surface of the first section 311c of the receptor 31c and the outer surface of the casing or the receptor 33c The appearance of the heater 30c.

And, the base or flange 34c, after assembly, surrounds and combines with the part of the shell or susceptor 33c near the end 320c.

Or in the implementation of some changes, the shell or the susceptor 33c has a shorter extension length; after assembly, the shell or the susceptor 33c only completely surrounds the second section 312c of the magnetic field generator 32c and the susceptor 31b, and feels A third section 313c of body 31b is at least partially exposed outside the housing or susceptor 33c; and a rear base or flange 34c surrounds and engages the third section 313c exposed outside the housing or susceptor 33c.

Alternatively, FIG. 13 shows a schematic diagram of a susceptor 31d in yet another variant embodiment; the susceptor 31d has a tapered first section 311d and a slender rod-shaped second section 312d. The groove 3131d, the groove 3132d, the groove 3133d and the groove 3134d are formed on the portion near the end of the second section 312d and extend in the axial direction. The groove 3131d, the groove 3132d, the groove 3133d and the groove 3134d have a length of about 3-5 mm, and are used to accommodate and hold the conductive pin or galvanic wire in the groove 3131d, the groove 3132d, the groove 3133d and groove 3134d, and extends to the outside of the end.

It should be noted that the preferred embodiments of the application are given in the description of the application and its drawings, but they are not limited to the embodiments described in the description. Further, for those of ordinary skill in the art, they can Improvements or transformations are made according to the above description, and all these improvements and transformations shall fall within the scope of protection of the appended claims of this application.

Claims (15)

1. An aerosol generating device for heating an aerosol generating product to generate an aerosol; it is characterized in that, comprising: a chamber for receiving an aerosol-generating article; a heater extending at least partially within the chamber and having a free front end and an end facing away from the free front end for insertion into the aerosol-generating article to heat the aerosol-generating article, the heater comprising: The first receptor is configured to extend between the free front end and the end, and has a first section, a second section, and a third section arranged in sequence along the free front end toward the end; the second The maximum outer diameter of the section is smaller than the maximum outer diameter of the first section and the third section, thereby defining a first section between the first section and the third section on the surface of the first susceptor. groove; and An induction coil for generating a changing magnetic field, the induction coil is housed or held in the first groove and configured to surround the second section. 2. The aerosol generating device according to claim 1, wherein the extension length of the second section is greater than the extension length of the first section and/or the third section. 3. The aerosol generating device according to claim 1 or 2, wherein 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 configured to extend axially along the first susceptor and terminate at the end; the conductive pin is at least partially accommodated and retained in the second susceptor. inside the groove. 4. The aerosol generating device according to claim 3, characterized in that, the cross-section of the wire material of the conductive pin is configured as a flat shape. 5. The aerosol generating device according to claim 1 or 2, wherein the heater further comprises: The first galvanic wire and the second galvanic wire are connected to the first receptor; the first galvanic wire and the second galvanic wire have different materials, so that the first galvanic wire and the second galvanic wire have different materials. A thermocouple for sensing the temperature of the first receptor is formed between the two galvanic wires. 6. The aerosol generating device according to claim 5, wherein the third section is provided with a third groove configured to extend along the axial direction of the first receptor and terminate at the The end; the first galvanic wire and the second galvanic wire are at least partially accommodated and held in the third groove. 7. The aerosol generating device according to claim 1 or 2, characterized in that, the section of the wire material of the induction coil is configured such that the dimension extending along the axial direction of the induction coil is larger than the dimension extending along the radial direction. 8. The aerosol-generating device of claim 1 or 2, wherein the first groove is annular around the second section. 9. The aerosol generating device according to claim 1 or 2, wherein the heater further comprises: A base or a flange is combined with the third section; the aerosol generating device supports the heater by holding the base or the flange. 10. The aerosol generating device according to claim 1 or 2, wherein the heater further comprises: A protective layer surrounds and covers the outer surface of the second section to confine at least part of the induction coil within the first groove. 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 according to claim 1 or 2, wherein the heater further comprises: A non-responsive housing, or second susceptor, surrounds the induction coil and at least partially defines the outer surface of the heater. 13. A heater for an aerosol generating device, characterized in that the heater is configured as an elongated pin or needle or column or sheet, and has a free front end and an end facing away from each other along the length direction ; The heater comprises: The first receptor is configured to extend between the free front end and the end, and has a first section, a second section, and a third section arranged in sequence along the free front end toward the end; the second The maximum outer diameter of the section is smaller than the maximum outer diameter of the first section and the third section, thereby defining a first section between the first section and the third section on the surface of the first susceptor. groove; An induction coil is used to generate a changing magnetic field; the induction coil is accommodated or held in the first groove and configured to surround the second section. 14. An aerosol generating device for heating an aerosol generating product to generate an aerosol; it is characterized in that it comprises: a chamber for receiving an aerosol-generating article; a heater extending at least partially within the chamber and having a free front end and an end facing away from the free front end for insertion into the aerosol-generating article to heat the aerosol-generating article; the heater comprising: a first susceptor configured to extend between said free front end and end; An induction coil at least partially surrounds the first susceptor and is configured to generate a changing magnetic field; conductive pins are provided on the induction coil for powering the induction coil; The first susceptor is provided with a second groove, the second groove is configured to extend along the axial direction of the first susceptor and terminate at the end; the conductive pin at least partially accommodates and holds in the second groove. 15. A heater for an aerosol generating device, characterized in that the heater is configured as an elongated pin or needle or column or sheet, and has a free front end and an end opposite to each other along the length direction ; The heater also includes: a first susceptor configured to extend between said free front end and end; An induction coil at least partially surrounds the first susceptor and is configured to generate a changing magnetic field; conductive pins are provided on the induction coil for powering the induction coil; The first susceptor is provided with a second groove, the second groove is configured to extend along the axial direction of the first susceptor and terminate at the end; the conductive pin at least partially accommodates and holds in the second groove.

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