WO2024078346A1

WO2024078346A1 - Aerosol generating device and heater for aerosol generating device

Info

Publication number: WO2024078346A1
Application number: PCT/CN2023/122205
Authority: WO
Inventors: 曾文; 彭亮; 朱赛胜; 胡水钊; 程洪森; 贺景松; 张文博; 吴泽鑫; 徐中立; 李永海
Original assignee: 深圳市合元科技有限公司
Priority date: 2022-10-10
Filing date: 2023-09-27
Publication date: 2024-04-18
Also published as: CN117898481A

Abstract

An aerosol generating device, configured to heat an aerosol generating product (1000) to generate an aerosol. The aerosol generating device comprises: a heater (30) having a free front end (311) and a tail end (312) facing away from each other, and a heating portion at least partially extending between the free front end (311) and the tail end (312) for insertion into the aerosol generating product (1000) for heating; a first annular element (331) which surrounds or is combined with the heating portion; a second annular element (332) which surrounds or is combined with the heating portion, the second annular element (332) and the first annular element (331) being arranged at an interval in the length direction of the heating portion; and a base (34) formed by molding at least part of a moldable material around part of the heating portion between the first annular element (331) and the second annular element (332).

Description

Aerosol generating device and heater for aerosol generating device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to a Chinese patent application filed with the Chinese Patent Office on October 10, 2022, with application number 202211235276.9 and entitled “Aerosol Generating Device and Heater for an Aerosol Generating Device”, the entire contents of which are incorporated by reference into this application.

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 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. People have attempted to replace these tobacco-burning articles by creating products that release compounds without combustion.

Examples of such products are heating devices that release compounds by heating rather than burning a material. For example, the material may be tobacco or other non-tobacco products that may or may not contain nicotine. Known heating devices heat tobacco or other non-tobacco products by inserting a pin or needle-shaped resistive heater into the product.

Summary of the invention

One embodiment of the present application provides an aerosol generating device, which is configured to heat an aerosol generating article to generate an aerosol; comprising:

A heater for heating an aerosol-generating article; the heater comprising a free front end and a rear end that are separated from each other in a length direction, and:

a heating portion extending at least partially between the free front end and the distal end for insertion into the aerosol generating article for heating;

at least one annular element surrounding or coupled to the heating portion;

A base at least partially surrounds the heating part and is arranged to provide structural support to the heating part so as to hold the heating part to the aerosol generating device; the base includes a coupling portion coupled to the outer surface of the heating part, the coupling portion abuts against the annular element along the length direction of the heating part to prevent the base from moving relative to the heating part along the length direction of the heating part.

In some implementations, the heating portion includes:

The housing at least partially extends between the free front end and the end; the housing is provided with a first cavity;

The resistance heating coil is located in the first cavity.

In some implementations, the resistive heating coil is configured as a solenoid coil;

The cross-section of the conductor material of the resistance heating coil has a larger extension dimension in the axial direction than in the radial direction.

In some implementations, the at least one annular element comprises a metal or an alloy.

In some implementations, the outer surface of the at least one annular element has a color that is different from the outer surface of the heating portion.

In some implementations, the extension dimension of the at least one annular element along the length direction of the heating portion is 0.5 to 2 mm;

And/or, an extension dimension of the at least one annular element along the length direction of the heating portion is smaller than an extension dimension of the base along the length direction of the heating portion.

In some implementations, the wall thickness of the annular element is 0.1-0.5 mm.

In some implementations, the base is molded from a moldable material around a portion of the heating portion to couple the base to the heating portion.

In some implementations, the base includes an organic polymer.

In some implementations, the at least one annular element is flush with the end.

In some implementations, the base includes a first surface proximate to or toward the free front end;

The at least one annular element is enclosed within the base and is flush with the first surface.

In some implementations, the at least one annular element is located at a distance greater than 0.5 mm from the end.

The at least one annular element partially extends from within the base to outside the first surface.

In some implementations, the base is further provided with:

One or more connecting parts are arranged around the circumference of the base, and the base is fastened to the aerosol generating device through the connecting parts.

In some implementations, the at least one annular element includes at least:

The first annular element and the second annular element are arranged at intervals along the length direction of the heating portion; and the combining portion is at least partially located between the first annular element and the second annular element.

In some implementations, the base includes:

an inner side wall close to or at least partially coupled to the heating portion and an outer side wall facing away from the inner side wall;

At least one second cavity is located between the inner sidewall and the outer sidewall to provide thermal insulation between the inner sidewall and the outer sidewall.

In some implementations, the base includes a first side close to or toward the free front end, and a second side facing away from the first side;

The at least one second cavity is open at the second side, and the at least one second cavity is closed at the first side.

In some implementations, there is no gap between the combining portion and the heating portion;

And/or, a gap between the combining portion and the heating portion is less than 0.05 mm.

The angle between the central axis of the heating portion and the normal line perpendicular to the first surface is less than 1°.

In some implementations, the resistance heating coil includes a first end close to the free front end and a second end close to the terminal end along its axial direction;

The heating part further comprises: a first conductive pin and a second conductive pin for supplying power to the resistance heating coil; wherein,

The first conductive pin is connected to the first end and at least partially extends from the first end to outside the terminal end;

The second conductive pin is connected to the second end and at least partially extends from the second end to outside the terminal end;

The distance between the first conductive pin and the second conductive pin is between 0.7 mm and 0.9 mm.

In some implementations, the method further includes:

Battery cells, used to provide electricity;

The circuit is configured to control the battery cell to provide power to the heater to keep the temperature of the heating portion surrounded by the base below 340°C.

Another embodiment of the present application further provides an aerosol generating device, which is configured to heat an aerosol generating article to generate an aerosol; comprising:

at least one annular element surrounding or coupled to the heating portion;

A base is molded of a moldable material around the heating portion and a portion of the at least one annular element to couple the base to the heating portion and the at least one annular element.

a first annular element surrounding or coupled to the heating portion;

A second annular element surrounding or combined with the heating portion; the second annular element and the first annular element are arranged at intervals along the length direction of the heating element;

A base is molded of a moldable material at least partially around a portion of the heating portion between the first and second annular elements.

a housing extending at least partially between the free front end and the distal end for insertion into the aerosol-generating article;

a resistance heating coil housed and held within the housing;

at least one groove or cavity defined by the outer surface of the housing and disposed around the housing along the circumference of the housing;

A base is molded of moldable material around a portion of the housing and extends at least partially into the at least one groove or cavity to prevent movement of the base relative to the housing along the length of the housing.

A base at least partially surrounds or is combined with the heating portion; the aerosol generating device provides support for the heater through the base; the base comprises:

an inner surface surrounding or coupled to the heating portion, and an outer surface facing away from the inner surface;

At least one second cavity is located between the inner surface and the outer surface to reduce the transfer of heat from the heating portion to the outer surface.

Another embodiment of the present application further provides a heater for an aerosol generating device, the heater comprising a free front end and a rear end which are separated from each other along a length direction, and:

at least one annular element surrounding or coupled to the heating portion;

A base at least partially surrounds the heating part to provide structural support for the heating part; the base includes a bonding portion coupled to the outer surface of the heating part, the bonding portion abuts against the at least one annular element along the length direction of the heating part to prevent the base from moving relative to the heating part along the length direction of the heating part.

A base at least partially surrounds or is combined with the heating portion to provide structural support for the heating portion; the base comprises:

a base at least partially surrounding the heating portion and arranged to provide structural support to the heating portion to retain the heating portion to the aerosol generating device;

The base includes a first surface close to or facing the free front end;

An aerosol generating device is configured to heat an aerosol generating article to generate an aerosol; comprising:

A heater for heating the aerosol generating article; the heater comprising:

A heating portion for insertion into the aerosol generating article for heating, and having a free front end and a rear end which are separated from each other in the length direction;

A base is molded around a portion of the heating portion from a moldable material and is arranged to provide structural support to the heating portion; the base and the end of the heating portion have The spacing between the base and the heating portion defines a step near the end;

The spacing between the base and the end of the heating portion is greater than 0.5 mm.

In the above aerosol generating device, it is advantageous for the heater to provide a stop for the base outside the heating portion by means of an annular element.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

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

FIG2 is a schematic structural diagram of the heater in FIG1 from a viewing angle;

FIG3 is an exploded schematic diagram of the heater in FIG2 from one viewing angle;

FIG4 is a cross-sectional schematic diagram of the heater in FIG2 from one viewing angle;

FIG5 is a schematic structural diagram of a base according to one embodiment;

FIG6 is a schematic diagram of a housing of yet another embodiment;

FIG7 is a schematic structural diagram of a heater according to another embodiment;

FIG8 is a schematic structural diagram of a heater according to another embodiment;

FIG9 is a schematic structural diagram of a heater according to another embodiment;

FIG10 is a schematic structural diagram of a heater according to another embodiment;

FIG11 is a schematic structural diagram of a mold for molding a base outside a housing in one embodiment;

FIG12 is a schematic diagram of the mold being closed;

FIG. 13 is a schematic diagram of demoulding after molding the base.

Detailed ways

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

An embodiment of the present application provides an aerosol generating device, the structure of which can be seen in FIG1 , including:

a chamber having an opening 40; in use, an aerosol-generating article 1000 can be removably received in the chamber through the opening 40 of the chamber;

The heater 30 extends at least partially within the chamber and is inserted into the aerosol generating article 1000 to heat the aerosol generating article 1000 when the aerosol generating article 1000 is received in the chamber, so that the aerosol generating article 1000 releases a plurality of volatile compounds, and these volatile compounds are only released by heating. Process to form;

Battery cell 10, used for power supply;

The circuit 20 is used to guide the current between the battery cell 10 and the heater 30 .

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 ampere 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, a needle, a rod, a bar, a column, a sheet or a plate, which is advantageous for insertion into the aerosol generating article 1000; at the same time, the heater 30 can have a length of approximately 12 to 20 mm and an outer diameter of approximately 2 to 4 mm.

Further in an optional implementation, the aerosol generating article 1000 preferably uses a tobacco-containing material that releases volatile compounds from the substrate when heated; or it can also be a non-tobacco material that can be heated and suitable for electric heating and smoking. The aerosol generating article 1000 preferably uses a solid substrate, which can include one or more of powder, particles, fragments, strips or sheets of one or more of herb leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; or, the solid substrate can contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

In implementations, the heater 30 may generally include a resistive heating element, and an auxiliary substrate to assist in the preparation of the resistive heating element fixation, etc. For example, in some implementations, the resistive heating element is in the shape or form of a spiral coil. Or in some other implementations, the resistive heating element is in the form of a conductive track bonded to a substrate. Or in some other implementations, the resistive heating element is in the shape of a thin sheet.

Further, FIGS. 2 to 4 show schematic diagrams of a heater 30 according to an embodiment; the heater 30 according to the embodiment comprises a free front end 311 and a rear end 312 opposite to each other along the length direction; wherein the free front end 311 is a tapered tip for being inserted into the aerosol generating article 1000; specifically, the heater 30 comprises:

The housing 31 is configured to be in the shape of a pin, needle, column or rod; and the two opposite ends of the housing 31 along the length direction respectively define a free front end 311 and a terminal end 312 of the heater 30; and the housing 31 has a cavity 313 extending between the free front end 311 and the terminal end 312. The cavity 313 is opened or exposed at the terminal end 312, so as to facilitate the assembly of various functional components therein.

In some embodiments, the shell 31 is heat-conductive; the shell 31 is made of a heat-conductive material, such as ceramics such as alumina ceramics, zirconia ceramics, or glass, or metals or alloys such as iron-aluminum alloys, stainless steel, and the like.

In this embodiment, the cavity 313 of the housing 31 is provided with:

Resistance heating coil 32;

Furthermore, the conductive pin 321 and the conductive pin 322 are respectively connected to the two ends of the resistance heating coil 32 to supply power to the resistance heating coil 32; the conductive pin 321 and the conductive pin 322 at least partially extend from the cavity 313 to the outside of the end 312, which is beneficial for connecting with the circuit 20. Furthermore, the conductive pin 321 is connected to the upper end of the resistance heating coil 32 by welding or the like, and penetrates the resistance heating coil 32 to the outside of the end 312; the conductive pin 322 is directly connected to the lower end of the resistance heating coil 32 by welding or the like. The conductive pin 321 and the conductive pin 322 have a diameter of about 0.1 to 0.5 mm. Or in some specific embodiments, the conductive pin 321 and the conductive pin 322 have a diameter of 0.3 mm.

In practice, the housing 31 and the resistance heating coil 32 held in the housing 31 constitute a heating portion for heating when inserted into the aerosol generating article 1000 .

Alternatively, in some other variations, a heating portion for inserting into the aerosol generating article 1000 for heating is defined by a rod-shaped heating component; for example, the heating component may also include: a rod-shaped electrically insulating substrate such as ceramic, polymer, etc., and a resistive heating track formed or bonded to the electrically insulating substrate, etc.

In some implementations, the housing 31 has an outer diameter of about 2.0-2.8 mm and a wall thickness of about 0.1-0.3 mm; the inner diameter of the cavity 313 of the housing 31 is about 1.5-2.1 mm, and the length of the cavity 313 is about 12-15 mm.

In an optional implementation, the material of the resistance heating coil 32 is a composite material of metal material, metal alloy, graphite, carbon, conductive ceramic or other ceramic material and metal material with appropriate impedance. Among them, the appropriate metal or alloy material includes at least one of nickel, cobalt, zirconium, titanium, nickel alloy, cobalt alloy, zirconium alloy, titanium alloy, nickel-chromium alloy, nickel-iron alloy, iron-chromium alloy, iron-chromium-aluminum alloy, iron-manganese-aluminum-based alloy or stainless steel. Of course, after assembly, the resistance heating coil 32 and the inner wall of the cavity 313 of the shell 31 are insulated from each other. And in use, the shell 31 heats the aerosol generating product 1000 by receiving or transmitting the heat of the resistance heating coil 32. In some embodiments, the surface of the resistance heating coil 32 is sprayed or deposited or surface oxidized to form an insulating layer, so as to provide insulation between the resistance heating coil 32 and the inner wall of the cavity 313 of the shell 31.

And in some embodiments, the conductive pin 321 and/or the conductive pin 322 has a diameter of approximately 0.1 to 0.5 mm; and the conductive pin 321 and/or the conductive pin 322 has a length of approximately 20 to 40 mm. And the conductive pin 321 and/or the conductive pin 322 are made of a metal or alloy with low resistivity, such as gold, silver, copper or an alloy containing them; or in some other embodiments, the conductive pin 321 and/or the conductive pin 322 are made of copper wire or copper wire with a coating such as a nickel layer on the surface. Or in some other embodiments, the conductive pin 321 and/or the conductive pin 322 may also be sprayed or coated with an insulating layer, such as a ceramic layer, a glaze layer, or an organic layer For example, in some embodiments, the conductive pin 321 and/or the conductive pin 322 is covered with a Teflon insulating tube, which is beneficial for providing insulation.

Furthermore, the conductive pins 321 and 322 are spaced apart from each other; and the spacing between the conductive pins 321 and 322 is between 0.8 mm±0.1 mm; and the spacing between the conductive pins 321 and 322 is between 0.7 mm and 0.9 mm.

And, the resistive heating coil 32 is not in contact with the aerosol generating article 1000.

According to the embodiment shown in Figures 3 and 4, the cross-sectional shape of the wire material of the resistance heating coil 32 configured as a solenoid coil is different from the conventional circular shape. In the implementation shown in Figures 3 and 4, the cross-sectional shape of the wire material of the resistance heating coil 32 has a dimension extending in the axial direction that is greater than the dimension extending in the radial direction perpendicular to the axial direction, so that the cross-sectional shape of the wire material of the resistance heating coil 32 is a flat rectangular shape.

In short, the resistance heating coil 32 of the above structure is completely or at least flattened in the form of the wire material compared to the conventional spiral heating coil formed by the circular cross-section wire. Therefore, the wire material extends to a lesser extent in the radial direction. By this measure, the energy loss in the resistance heating coil 32 can be reduced. In particular, the heat generated by the resistance heating coil 32 can be promoted to be transferred radially toward the housing 31.

Or in some other variations, the wire material of the resistance heating coil 32 may have a circular cross-section.

And, and further referring to FIG. 2 , the heater 30 further includes:

The base 34 at least partially surrounds or is combined with the housing 31; the base 34 is basically arranged near the end 312, and the aerosol generating device clamps or holds the base 34 so that the heater 30 is stably installed and fixed in the device. In addition, the base 34 is basically away from the resistance heating coil 32; or, the base 34 is basically located at the end of the resistance heating coil 32 near the end 312. Or in some other embodiments, the base 34 is closer to the end 312 than the resistance heating coil 32; or in some other embodiments, the base 34 is staggered with the resistance heating coil 32 along the length of the heater 30; or in some other embodiments, the distance between the base 34 and the resistance heating coil 32 along the length of the heater 30 is greater than 1 mm.

In some embodiments, the base 34 is independently prepared and then combined with the housing 31 by riveting or mechanical fixing.

Alternatively, in some other embodiments, the base 34 is molded from a moldable material around the housing 31. The base 34 is made of an organic polymer such as PEEK, polytetrafluoroethylene, polyurethane, polyresin, etc., or a moldable material such as ceramic.

And in some embodiments, the circuit 20 controls the power provided by the battery cell 21 to the heater 30 so that the temperature of the heating portion and/or the portion of the housing 31 surrounded by the base 34 is lower than 340° C. in use; or in some other embodiments, in operation, the heating portion and/or the housing 31 The temperature of the portion surrounded by the susceptor 34 is lower than 320°C.

As further shown in FIGS. 2 to 4 , the base 34 has a first side 3410 and a second side 3420 that are opposite to each other in the longitudinal direction. In implementation, the first side 3410 is toward or close to the free front end 311, and the second side 3420 is toward or close to the end 312. After assembly, the surface of the first side 3410 of the base 34 is flush with the inner bottom wall of the chamber away from the opening 40. After assembly, the surface of the first side 3410 of the base 34 is at least partially exposed to the chamber.

The surface of the first side 3410 of the base 34 is substantially perpendicular to the central axis of the housing 31 and/or the heating portion. Alternatively, in some embodiments, the angle between the central axis of the housing 31 and/or the heating portion and the normal to the surface of the first side 3410 of the base 34 is less than 1°; or in some embodiments, the angle between the central axis of the housing 31 and/or the heating portion and the normal to the surface of the first side 3410 of the base 34 is less than 0.5°.

And further referring to FIGS. 2 to 4 , the base 34 includes:

An outer wall 341 and an inner wall 342 that are radially opposed to each other; wherein the outer wall 341 defines an outer surface that circumferentially surrounds the base 34, and the inner wall 342 defines an inner surface that surrounds the housing 31;

The cavity 343 is located between the outer side wall 341 and the inner side wall 342 ; the cavity 343 is closed at the first side 3410 , and the cavity 343 is open at the second side 3420 .

And, the outer side wall 341 and the inner side wall 342 are connected at the first side 3410, and are not connected at the second side 3420. And, the space of the cavity 343 is filled with air to at least prevent the heat of the housing 31 from being transferred to the outer side wall 341. Alternatively, the cavity 343 is used to provide thermal insulation.

In some embodiments, the base 34 has an outer contour shape that is substantially circular, square, polygonal, or the like.

As further shown in FIGS. 2 to 4 , the second side 3420 of the base 34 is substantially flush with the end 312 of the housing 31 .

And in some embodiments, the extension dimension of the base 34 along the longitudinal direction of the heater 30 is 3 to 6 mm.

Further referring to FIGS. 2 to 4 , the base 34 further includes:

One or more connecting parts 344 are arranged circumferentially around the base 34 and/or the outer wall 341; the connecting part 344 may be provided with a screw hole 345 or a connecting hole or a connecting groove or other fastening structure, and during assembly, screws, hooks, etc. are used to cooperate with the screw holes 345 or other fastening structures of the connecting part 344 to fasten the base 34 and/or the heater 30 in the aerosol generating device.

In the embodiment of FIGS. 2 to 4 , the connection portion 344 extends radially from the outer side wall 341 , and the connection portion 344 protrudes relative to the outer side wall 341 , and the screw hole 345 penetrates the connection portion 344 along the longitudinal direction of the base 34 .

In the embodiment shown in FIG. 4 , the inner sidewall 342 is slightly more protruding than the outer sidewall 341 on the second side 3420; for example, in FIG. 4 , the inner sidewall 342 is 0.4 mm more protruding than the outer sidewall 341 on the second side 3420. Alternatively, in some implementations, the outer sidewall 341 and the inner sidewall 342 are flush at the second side 3420. Alternatively, in yet other embodiments, the outer sidewall 341 is relatively slightly more protruding than the inner sidewall 342 on the second side 3420.

Or FIG. 5 shows a schematic diagram of a base 34c of another variant embodiment, in which the base 34c comprises:

The outer wall 341c is provided with a groove 3411c, which surrounds the outer wall 341c and/or the base 34c in a circumferential direction. During assembly, the aerosol generating device at least partially extends into the groove 3411c, thereby preventing the base 34c from moving in the axial direction. At the same time, the base 34 and/or the heater 30 can be fastened in the aerosol generating device by at least partially extending into the groove 3411c in a compacting manner.

Or in the embodiment of FIG. 5 , the base 34c further includes:

A connecting portion 344c extends from the outer side wall 341c to the outside of the second side 3420c; the number of the connecting portion 344c may be one or more, and the plurality of connecting portions 344c may also be arranged circumferentially around the outer side wall 341c.

The connecting portion 344c protrudes relative to the second side 3420c in the longitudinal direction. During assembly, the screw holes 345c on the connecting portion 344c are screwed to fasten the base 34c and/or the heater 30 in the aerosol generating device.

And further referring to FIG. 2 to FIG. 4 , the heater 30 further includes:

At least one annular element, such as the annular element 331 and the annular element 332, surrounds and is coupled to at least a portion of the outer surface of the housing 31. Furthermore, the annular element 331 and the annular element 332 are arranged at intervals along the longitudinal direction of the housing 31;

Furthermore, the inner wall 342 of the base 34 has a portion 3421 that is inserted between the annular element 331 and the annular element 332; and thus after assembly, the portion 3421 is in abutment against the annular element 331 and/or the annular element 332 in the longitudinal direction; or, the portion 3421 is clamped by the annular element 331 and the annular element 332; thereby, the annular element 331 and the annular element 332 are used to prevent the base 34 from moving relative to the housing 31 in the longitudinal direction of the housing 31.

There is no gap between part 3421 of the molded base 34 and the outer surface of the shell 31, or the gap or clearance is less than 0.05 mm; compared with the method of independently preparing and then riveting or mechanically fixing the base 34 to the outer surface of the shell 31, there may be an assembly gap of 0.05 mm. The abutment between part 3421 and the annular element 331 and/or the annular element 332 is more stable.

In some implementations, the annular element 331 and the annular element 332 are combined with the outer surface of the housing 31 by riveting or the like.

In some implementations, the ring element 331 and the ring element 332 are made of metal or alloy. Prepared by, for example, stainless steel, brass, aluminum alloy, titanium alloy, etc.

In some specific implementations, the annular element 331 and/or the annular element 332 has a different color from the outer surface of the housing 31. For example, the housing 31 is made of stainless steel, and the outer surface of the housing 31 is silver; the annular element 331 and/or the annular element 332 is made of brass, and the annular element 331 and/or the annular element 332 is yellow. In the preparation, it is advantageous for the equipment to identify and locate the position of the annular element 331 and/or the annular element 332, and then assemble and prepare the base 34 around the annular element 331 and/or the annular element 332.

In an implementation, the base 34 completely surrounds the annular element 331 and/or the annular element 332; that is, after assembly, the annular element 331 and/or the annular element 332 does not extend or is exposed outside the base 34. In addition, the annular element 331 is closer to the first side 3410 of the base 34, and the annular element 332 is closer to the second side 3420 of the base 34.

As further shown in FIG4 , after assembly, the annular element 331 and/or the annular element 332 are surrounded or enclosed by the inner wall of the base 34. The annular element 331 and/or the annular element 332 are wrapped or shielded by the base 34. For example, in the embodiment shown in FIG4 , the surface of the first side 3410 of the base 34 is closer to the free front end 311 than the annular element 331.

And in some embodiments, the annular element 332 is closer to the end 312 than the annular element 331; and, the annular element 332 is close to or located at the end 312 of the shell 31; and in Figure 4, the annular element 332 and the end 312 of the shell 31 are basically spaced apart; the spacing between the annular element 332 and the end 312 of the shell 31 is greater than or equal to 0.5 mm.

And in some embodiments, the extension size of the annular element 331 and/or the annular element 332 along the axial direction is the same. In some specific embodiments, the extension size of the annular element 331 and/or the annular element 332 along the axial direction is 0.5-2 mm. And in some embodiments, the spacing between the annular element 331 and the annular element 332 is between 0.5-1 mm.

In some implementations, the wall thickness of the annular element 331 and the annular element 332 is 0.1-0.5 mm. The outer surface of the annular element 331 and/or the annular element 332 is protruding relative to the outer surface of the housing 31, and the protruding height is 0.1-0.5 mm.

Or in some other embodiments, the extension dimensions of the annular element 331 and the annular element 332 along the axial direction are different. For example, the extension dimension of the annular element 331 along the axial direction is greater than the extension dimension of the annular element 332 along the axial direction.

6 and 7 further show a schematic diagram of a heater 30 of another embodiment. In this embodiment, the heater 30 includes:

The housing 31a has at least one groove or cavity 314a formed on the outer surface of the housing 31a and surrounding the housing 31a; and the housing 31a is close to the end 312a;

The base 34a surrounds or is combined with the housing 31a; and the inner side wall 342a of the base 34a has a portion 3421a extending into or inserted into the groove or cavity 314a.

It is therefore advantageous that after assembly, the portion 3421a extends or snaps into the groove or cavity 314a, thereby preventing the base 34a from moving relative to the housing 31a in the longitudinal direction of the housing 31a.

Or FIG. 8 shows a schematic diagram of a heater 30 of another variant embodiment. In this embodiment, the heater 30 includes:

The outer shell 31b has only one annular element 331b; the annular element 331b may be formed on the outer surface of the outer shell 31b by riveting or the like;

The base 34b surrounds and is combined with the shell 31b, and the base 34b surrounds the annular element 331b; therefore, after assembly, the annular element 331b prevents the base 34b from moving relative to the shell 31b along the longitudinal direction of the shell 31b.

The annular element 331b is located between the first side 3410b and the second side 3420 of the base 34b. The annular element 331b is spaced apart from the end 312b and is spaced apart from the first side 3410b.

Or FIG. 9 shows a schematic diagram of a heater 30 of another variant embodiment. In this embodiment, the heater 30 includes:

The housing 31d defines a free front end 311d and a rear end 312d that are separated from each other;

The annular element 331d and the annular element 332d are sequentially spaced and combined outside the housing 31d; the extending length of the annular element 331d along the axial direction is greater than the extending length of the annular element 332d along the axial direction; the annular element 332d is closer to the end 312d than the annular element 331d; and the annular element 332d and the end 312d maintain a spacing greater than or equal to 0.5 mm; or in some other embodiments, the annular element 332d and the end 312d may be flush;

The base 34d surrounds and is coupled to the housing 31d, and the base 34d completely surrounds the annular element 331d and completely surrounds the annular element 332d; and the inner side wall 342d of the base 34d has a portion 3421d extending between the annular element 332d and the annular element 331d, thereby preventing the base 34d from moving longitudinally relative to the housing 31d.

In this embodiment, the annular element 331d is flush with the first side 3410d of the base 34d; and the annular element 332d is flush with the second side 3420d of the base 34d. The annular element 331d is flush with the first side 3410d of the base 34d, which is beneficial for the precise control and positioning of the injection amount of the injection molding material during the molding process of the base 34d.

In this embodiment, there is a distance d12 between the base 34d and the end 312d of the shell 31d; and the distance d12 is greater than 0.5 mm; and in the implementation, a step 3430d is defined between the base 34d and the end 312d of the shell 31d. In the molding, the equipment or mold completes the material injection of the base 34d at this position, which is beneficial to prevent the molding slurry from overflowing outside the end 312d during the injection molding process and improve the verticality of the second base 34d and the shell 31d. In the implementation, the step 3430d is beneficial for the curing and demolding of the base 34d.

Or FIG. 10 shows a schematic diagram of a heater 30 of another variant embodiment. In this embodiment, the heater 30 includes:

The housing 31e defines a free front end 311e and a rear end 312e that are separated from each other;

The annular element 331e and the annular element 332e are sequentially spaced and combined outside the housing 31e; the extending length of the annular element 331e along the axial direction is greater than the extending length of the annular element 332e along the axial direction; the annular element 332e is closer to the end 312e than the annular element 331e; and the annular element 332e and the end 312e may maintain a spacing or may be substantially flush;

The base 34e surrounds and is coupled to the housing 31e, and the base 34e only surrounds a portion of the annular element 331e, and completely surrounds the annular element 332e; and the inner wall 342e of the base 34e has a portion 3421e extending between the annular element 332e and the annular element 331e, thereby preventing the base 34e from moving longitudinally relative to the housing 31e.

And after assembly, the annular element 331e at least partially protrudes relative to the first side 3410e of the base 34e, or the annular element 331e at least partially extends out or is exposed outside the first side 3410e of the base 34e.

And in the embodiment, the length or dimension d11 of the annular element 331e extending or exposed outside the first side 3410e of the base 34e is 1.0-2.0 mm. For example, in a specific embodiment, the length d11 of the annular element 331e extending outside the first side 3410e of the base 34e is 1.3 mm. This is beneficial for preventing the base 34e from scratching the exposed surface of the housing 31e near the free front end 311e during assembly or preparation.

Further, Figures 11 to 13 show schematic diagrams of molding the base 34 outside the housing 31 by a mold in one embodiment; as shown in the figure, the mold includes an upper mold 500, a lower mold 600 and a movable fixture 700. Among them:

The lower mold 600 has a holding cavity 610 for accommodating and holding the housing 31 on its surface opposite to the upper mold 500, and a mold cavity 620 surrounding the holding cavity 610 and for injection molding the base 34;

The movable jig 700 is provided with a tubular support component 710 , and the housing 31 is inserted into the support component 710 and thus retained; the support component 710 of the movable jig 700 passes from the lower side of the lower mold 600 to the upper side of the retaining cavity 610 .

In some embodiments, after the movable jig 700 and the lower mold 600 are assembled, the support member 710 always passes through the upper side of the holding cavity 610, so as to facilitate the assembly of the housing 31 on the support member 710. After assembly, the movable jig 700 is moved downward to move the housing 31 held on the support member 710 to a predetermined position in the holding cavity 610.

Then, the upper mold 500 and the lower mold 600 are molded together, and the upper mold 500 closes the cavity 620;

In addition, the upper mold 500 is provided with an avoidance hole 510 for allowing the shell 31 held in the holding cavity 610 to extend therein when the mold is closed; and, the upper mold 500 is also provided with an injection port 520, which is connected to the mold cavity 620, and is further used to inject a moldable material for forming the base 34 into the mold cavity 620 through the injection port 520, and the moldable material is solidified outside the shell 31 to form the base 34.

The mold closing process is shown in FIG11 and includes:

As shown by arrow R11 in FIG. 12 , the movable fixture 700 is first moved downward to move the housing 31 on the supporting member 710 to a predetermined position in the holding cavity 610 ;

Then, as shown by arrow R12 in FIG. 12 , the upper mold 500 is moved to the lower mold 600 to close the mold, and the cavity 620 is closed, and then injection molding can be performed.

The demoulding process is shown in FIG13 and includes:

As shown by arrow R21 in FIG. 13 , first separate the upper mold 500 from the lower mold 600 to open the cavity 620 ;

Then, the jig 700 is moved as indicated by the arrow R22 in FIG. 13 to eject the housing 31 molded with the base 34 from the upper side of the cavity 620 ; and then, the housing 31 molded with the base 34 is removed from the supporting member 710 of the jig 700 , thereby obtaining the heater 30 .

And in implementation, the annular element 331 and the annular element 332 outside the housing 31 can also be used to position the movable fixture 700 during movement.

And in some implementations, the tolerance or error of the wall thickness of the tube wall of the housing 31 is controlled to be less than 0.015 mm; this is beneficial for preventing flashing and sagging during the injection molding and demolding processes of the molded base 34 .

It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but are not limited to the embodiments described in the specification. Furthermore, it is possible for a person of ordinary skill 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 the present application.

Claims

An aerosol generating device is configured to heat an aerosol generating article to generate an aerosol; characterized by comprising:

A heater for heating an aerosol-generating article; the heater comprising a free front end and a rear end that are separated from each other in a length direction, and:

a heating portion extending at least partially between the free front end and the distal end for insertion into the aerosol generating article for heating;

at least one annular element surrounding or coupled to the heating portion;

A base at least partially surrounds the heating part and is arranged to provide structural support to the heating part so as to hold the heating part to the aerosol generating device; the base includes a coupling portion coupled to the outer surface of the heating part, the coupling portion abuts against the annular element along the length direction of the heating part to prevent the base from moving relative to the heating part along the length direction of the heating part.
The aerosol generating device according to claim 1, characterized in that the heating portion comprises:

A housing extending at least partially between the free front end and the end; a first cavity is defined in the housing;

The resistance heating coil is located in the first cavity.
The aerosol generating device according to claim 2, wherein the resistive heating coil is configured as a solenoid coil;

The cross-section of the conductor material of the resistance heating coil has a larger extension dimension in the axial direction than in the radial direction.
An aerosol generating device according to any one of claims 1 to 3, wherein the at least one annular element comprises metal or an alloy.
An aerosol generating device according to any one of claims 1 to 3, characterized in that the color of the outer surface of the at least one annular element is different from the color of the outer surface of the heating portion.
The aerosol generating device according to any one of claims 1 to 3, characterized in that the extension dimension of the at least one annular element along the length direction of the heating portion is 0.5 to 2 mm;

And/or, an extension dimension of the at least one annular element along the length direction of the heating portion is smaller than an extension dimension of the base along the length direction of the heating portion.
The aerosol generating device according to any one of claims 1 to 3, characterized in that the wall thickness of the annular element is 0.1 to 0.5 mm.
An aerosol generating device according to any one of claims 1 to 3, wherein the base is moulded from a mouldable material around a portion of the heating portion to couple the base to the heating portion.
The aerosol generating device of claim 8, wherein the base comprises an organic polymer.
An aerosol generating device according to any one of claims 1 to 3, wherein the at least one annular element is flush with the end.
The aerosol generating device according to any one of claims 1 to 3, characterized in that the distance between the at least one annular element and the end is greater than 0.5 mm.
The aerosol generating device according to any one of claims 1 to 3, characterized in that the base comprises a first surface close to or facing the free front end;

The at least one annular element is enclosed within the base and is flush with the first surface.
The aerosol generating device according to any one of claims 1 to 3, characterized in that the base comprises a first surface close to or facing the free front end;

The at least one annular element partially extends from within the base to outside the first surface.
The aerosol generating device according to any one of claims 1 to 3, characterized in that the base is further provided with:

One or more connecting parts are arranged around the circumference of the base, and the base is fastened to the aerosol generating device through the connecting parts.
The aerosol generating device according to any one of claims 1 to 3, characterized in that the at least one annular element comprises at least:

The first annular element and the second annular element are arranged at intervals along the length direction of the heating portion; and the combining portion is at least partially located between the first annular element and the second annular element.
The aerosol generating device according to any one of claims 1 to 3, characterized in that the base comprises: an inner side wall close to or at least partially combined with the heating part, and a back an outer side wall away from the inner side wall;

At least one second cavity is located between the inner sidewall and the outer sidewall to provide thermal insulation between the inner sidewall and the outer sidewall.
The aerosol generating device according to claim 16, characterized in that the base includes a first side close to or toward the free front end, and a second side facing away from the first side;

The at least one second cavity is open at the second side, and the at least one second cavity is closed at the first side.
The aerosol generating device according to any one of claims 1 to 3, characterized in that there is no gap between the combining portion and the heating portion;

And/or, a gap between the combining portion and the heating portion is less than 0.05 mm.
The aerosol generating device according to any one of claims 1 to 3, characterized in that the base comprises a first surface close to or facing the free front end;

The angle between the central axis of the heating portion and the normal line perpendicular to the first surface is less than 1°.
The aerosol generating device according to claim 2, characterized in that the resistance heating coil includes a first end close to the free front end and a second end close to the terminal end along its axial direction;

The heating part further comprises: a first conductive pin and a second conductive pin for supplying power to the resistance heating coil; wherein,

The first conductive pin is connected to the first end and at least partially extends from the first end to outside the terminal end;

The second conductive pin is connected to the second end and at least partially extends from the second end to outside the terminal end;

The distance between the first conductive pin and the second conductive pin is between 0.7 mm and 0.9 mm.
The aerosol generating device according to any one of claims 1 to 3, further comprising:

Battery cells, used to provide electricity;

The circuit is configured to control the power provided by the battery cell to the heater to keep the temperature of the portion of the heating portion surrounded by the base below 340°C.
An aerosol generating device is configured to heat an aerosol generating article to generate an aerosol; characterized by comprising:

A heater for heating an aerosol-generating article; the heater comprising a free front end and a rear end that are separated from each other in a length direction, and:

a heating portion extending at least partially between the free front end and the distal end for insertion into the aerosol generating article for heating;

at least one annular element surrounding or coupled to the heating portion;

A base is molded of a moldable material around the heating portion and a portion of the at least one annular element to couple the base to the heating portion and the at least one annular element.
An aerosol generating device is configured to heat an aerosol generating article to generate an aerosol; characterized by comprising:

A heater for heating an aerosol generating product; the heater comprises a plurality of The free front and end of the divergence, and:

a heating portion extending at least partially between the free front end and the distal end for insertion into the aerosol generating article for heating;

a first annular element surrounding or coupled to the heating portion;

A second annular element surrounding or combined with the heating portion; the second annular element and the first annular element are arranged at intervals along the length direction of the heating element;

A base is molded of a moldable material at least partially around a portion of the heating portion between the first and second annular elements.
An aerosol generating device is configured to heat an aerosol generating article to generate an aerosol; characterized by comprising:

A heater for heating an aerosol-generating article; the heater comprising a free front end and a rear end that are separated from each other in a length direction, and:

a housing extending at least partially between the free front end and the distal end for insertion into the aerosol-generating article;

a resistance heating coil housed and held within the housing;

at least one groove or cavity defined by an outer surface of said housing;

A base is molded of moldable material around a portion of the housing and extends at least partially into the at least one groove or cavity to prevent movement of the base relative to the housing along the length of the housing.
An aerosol generating device is configured to heat an aerosol generating article to generate an aerosol; characterized by comprising:

A heater for heating an aerosol-generating article; the heater comprising a free front end and a rear end that are separated from each other in a length direction, and:

a heating portion extending at least partially between the free front end and the distal end for insertion into the aerosol generating article for heating;

A base, at least partially surrounding or combined with the heating part; the aerosol generating device provides support for the heater through the base; the base includes: an inner surface surrounding or combined with the heating part, and an outer surface facing away from the inner surface;

At least one second cavity is located between the inner surface and the outer surface to reduce the transfer of heat from the heating portion to the outer surface.
A heater for an aerosol generating device, characterized in that the heater comprises a free front end and a rear end which are separated from each other along a length direction, and:

a heating portion extending at least partially between the free front end and the distal end for insertion into the aerosol generating article for heating;

at least one annular element surrounding or coupled to the heating portion;

A base at least partially surrounds the heating part to provide structural support for the heating part; the base includes a bonding portion coupled to the outer surface of the heating part, the bonding portion abuts against the at least one annular element along the length direction of the heating part to prevent the base from moving relative to the heating part along the length direction of the heating part.
A heater for an aerosol generating device, characterized in that the heater comprises a free front end and a rear end which are separated from each other along a length direction, and:

a heating portion extending at least partially between the free front end and the distal end for insertion into the aerosol generating article for heating;

A base at least partially surrounds or is combined with the heating portion to provide structural support for the heating portion; the base comprises:

an inner surface surrounding or coupled to the heating portion, and an outer surface facing away from the inner surface;

At least one second cavity is located between the inner surface and the outer surface to reduce the transfer of heat from the heating portion to the outer surface.
An aerosol generating device is configured to heat an aerosol generating article to generate an aerosol; characterized by comprising:

A heater for heating an aerosol-generating article; the heater comprising a free front end and a rear end that are separated from each other in a length direction, and:

a heating portion extending at least partially between the free front end and the distal end for insertion into the aerosol generating article for heating;

a base at least partially surrounding the heating portion and arranged to provide structural support to the heating portion to retain the heating portion to the aerosol generating device;

The base includes a first surface close to or facing the free front end;

The angle between the central axis of the heating portion and the normal line perpendicular to the first surface is less than 1°.
An aerosol generating device is configured to heat an aerosol generating article to generate an aerosol; characterized by comprising:

A heater for heating the aerosol generating article; the heater comprising:

A heating portion for insertion into the aerosol generating article for heating, and having a free front end and a rear end which are separated from each other in the length direction;

a base molded from a moldable material around a portion of the heating portion and arranged to provide structural support to the heating portion; the base is spaced apart from a distal end of the heating portion, and a step is defined between the base and the heating portion near the distal end;

The spacing between the base and the end of the heating portion is greater than 0.5 mm.
The aerosol generating device according to claim 29, characterized in that the heating portion comprises:

A housing extending at least partially between the free front end and the end; a first cavity is defined in the housing;

The resistance heating coil is located in the first cavity.
The aerosol generating device of claim 30, wherein the resistive heating coil is configured as a solenoid coil;

The cross-section of the conductor material of the resistance heating coil has a larger extension dimension in the axial direction than in the radial direction.
The aerosol generating device according to any one of claims 29 to 31, characterized in that the base comprises:

an inner surface surrounding or coupled to the heating portion, and an outer surface facing away from the inner surface;

At least one second cavity is located between the inner surface and the outer surface to reduce the transfer of heat from the heating portion to the outer surface.