Aerosol generating device and heater for aerosol generating device

Abstract

The utility model provides an aerosol generating device and a heater for the aerosol generating device. Wherein the aerosol-generating device comprises: a chamber for receiving an aerosol-generating article; the first heating body and the second heating body are continuously arranged in the longitudinal direction of the cavity; the first heating body and the second heating body are arranged around at least one part of the cavity; the battery cell is used for supplying power; the circuit operably supplies the electric power of the battery cell to the first heating body, so that the first heating body heats the aerosol generating product by generating heat; the second heating body is connected with the first heating body in a heat conduction manner, and is heated by receiving heat transmitted by the first heating body so as to heat the aerosol generating product. The above aerosol-generating device differently heats different portions of an aerosol-generating article by a first heating body heated by resistive Joule heat and a second heating body heated by receiving heat conducted by the first heating body.

Description

Technical Field

[0001] The present application relates 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 Art

[0002] 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.

[0003] An example of such a product is a heating device that releases a compound by heating rather than burning a material. For example, the material may be an aerosol-generating article containing tobacco or other non-tobacco products that may or may not contain nicotine. A known heating device contains and heats the aerosol-generating article by a tubular heater made of a conductive ceramic material, and by arranging electrodes at opposite ends of the conductive ceramic tubular heater in the axial direction, thereby directing current in the axial direction of the tubular heater to generate Joule heat. Utility Model Content

[0004] The present application provides an aerosol generating device, which is configured to heat an aerosol generating article to generate an aerosol; comprising:

[0005] a chamber for receiving the aerosol-generating article;

[0006] A first heating body and a second heating body are arranged continuously along the longitudinal direction of the chamber; the first heating body and the second heating body are arranged around at least a part of the chamber;

[0007] Battery cells, used for power supply;

[0008] a circuit operable to provide power from the battery cell to the first heating body so that the first heating body heats the aerosol-generating article by generating heat;

[0009] The second heating body is thermally connected to the first heating body and heats the aerosol generating article by receiving heat transferred by the first heating body.

[0010] In some embodiments, the chamber has an opening; in use, the aerosol-generating article can be at least partially received in or removed from the chamber through the opening; and the first heating body is closer to the opening than the second heating body.

[0011] In some embodiments, the first heating body is a conductive ceramic heating body; and / or the second heating body is a stainless steel piece.

[0012] In some embodiments, the thermal conductivity of the second heating body is less than the thermal conductivity of the first heating body.

[0013] In some embodiments, the thermal conductivity of the first heating body is greater than 20 W / mk; and / or, the thermal conductivity of the first heating body is between 25 and 40 W / mk;

[0014] And / or, the thermal conductivity of the second heating body is less than 20 W / mk; and / or, the thermal conductivity of the second heating body is between 10 and 20 W / mk.

[0015] In some embodiments, the second heating body has a connecting portion for connecting with the first heating body; the connecting portion is arranged around a portion of the first heating body and is connected to the first heating body by interference fit or tight fit.

[0016] In some embodiments, it also includes:

[0017] A first electrode and a second electrode are arranged at intervals along the circumference of the first heating body to guide current on the first heating body;

[0018] The circuit is arranged to supply power of the battery cell to the first heating body by connecting one of the first electrode and the second electrode to the positive electrode of the battery cell and the other to the negative electrode of the battery cell.

[0019] In some embodiments, the first heating body is configured to be tubular; and / or the circumference of the first heating body is greater than the axial length of the first heating body;

[0020] And / or, the second heating body is configured to be tubular; and / or, the circumference of the second heating body is greater than the axial length of the second heating body.

[0021] In some embodiments, the wall thickness of the first heating body is greater than or equal to the wall thickness of the second heating body.

[0022] Another embodiment of the present application further provides a heater for an aerosol generating device, comprising:

[0023] A first heating body and a second heating body are arranged in sequence and continuously in a longitudinal direction; the first heating body and the second heating body are configured in a tubular shape;

[0024] The first heating body is provided with a first electrode and a second electrode arranged at intervals in the circumferential direction, so as to conduct current on the first heating body, so that the first heating body can generate heat through Joule heat; the second heating body is thermally connected to the first heating body, and can generate heat by receiving heat transferred by the first heating body; the thermal conductivity of the second heating body is smaller than the thermal conductivity of the first heating body.

[0025] The above aerosol generating device heats different parts of the aerosol generating article differently by a first heating body and a second heating body, wherein the first heating body is heated by resistive Joule heat, and the second heating body is heated by receiving heat conducted by the first heating body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 is a schematic diagram of an aerosol generating device provided by an embodiment;

[0028] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle heater from one perspective;

[0029] Figure 3 yes Figure 2 An exploded schematic diagram of a view of the central heater;

[0030] Figure 4 yes Figure 2 An exploded schematic diagram of a cross-sectional view of the central heater;

[0031] Figure 5 yes Figure 2 A schematic cross-sectional view of a central heater from one perspective;

[0032] Figure 6 yes Figure 2 Schematic diagram of the working current of the central heater along the circumferential expansion angle. DETAILED DESCRIPTION

[0033] 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.

[0034] One embodiment of the present application provides an aerosol generating device 100 that heats, rather than burns, an aerosol generating product 1000, such as a cigarette, so that at least one component of the aerosol generating product 1000 is volatilized or released to form an aerosol for inhalation, for example Figure 1 shown.

[0035] In an optional embodiment, 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 flakes of one or more of herb leaves, tobacco leaves, homogenized tobacco, expanded tobacco, dried flowers, tea leaves, etc.; or, the solid substrate can contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

[0036] according to Figure 1 As shown, when the aerosol generating article 1000 is received in the aerosol generating device 100, a portion thereof is exposed outside the aerosol generating device 100, such as a filter tip, which is advantageous for a user to inhale.

[0037] The structure of the aerosol generating device 100 according to one embodiment of the present application can be seen in Figure 1 As shown, the overall appearance of the device is generally constructed in a longitudinal shape, and the aerosol generating device 100 includes:

[0038] 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;

[0039] A heater 30 is arranged at least partially around or bounding the chamber; when the aerosol generating article 1000 is received in the chamber, the heater 30 surrounds the aerosol generating article 1000 from the outside and heats the aerosol generating article 1000, so that the aerosol generating article 1000 releases a plurality of volatile compounds, and these volatile compounds are formed only by the heating process;

[0040] A battery cell 10 for supplying power; more preferably, the battery cell 10 is a rechargeable DC battery cell 10 and can be charged by connecting to an external power source;

[0041] The circuit board 20 , such as a PCB board or an FPC board, is provided with a circuit for conducting current between the battery cell 10 and the heater 30 .

[0042] exist Figure 1 and Figure 2In the illustrated embodiment, the heater 30 is arranged to be tubular in shape, and a chamber for receiving the aerosol-generating article 1000 is formed or defined by at least a portion of the tubular hollowness of the heater 30. When the aerosol-generating article 1000 is received in the chamber, the heater 30 at least partially surrounds or encloses the aerosol-generating article 1000 and heats the aerosol-generating article 1000 from the periphery thereof. Furthermore, when the aerosol-generating article 1000 is received in the chamber, it is at least partially contained and retained within the heater 30.

[0043] In some embodiments, the heater 30 may have an inner diameter of about 5.8 mm to 10 mm. In some embodiments, the heater 30 may have a length of about 10 mm to 15 mm. In an embodiment, the circumferential length or circumference of the heater 30 is greater than the length of the heater 30 in the axial direction. In some embodiments, the axial length of the heater 30 does not exceed 15 mm or is less than 15 mm; preferably, the axial length of the heater 30 is between 9 and 15 mm. In some specific embodiments, the heater 30 may have an inner diameter of 7.6 mm; the heater 30 may have a length of 11 mm.

[0044] according to Figures 2 to 6 In the illustrated embodiment, the heater 30 comprises:

[0045] The first heating body 31 and the second heating body 32 are sequentially arranged in the axial direction.

[0046] In some embodiments, the first heating body 31 is provided with first electrodes 313 and second electrodes 314 spaced apart in the circumferential direction for guiding current on the first heating body 31 , so that the first heating body 31 generates heat through resistive Joule heat.

[0047] In some embodiments, the second heating body 32 is not connected to the circuit board 20. The second heating body 32 generates heat only by receiving the heat conducted by the first heating body 31, and in turn heats the aerosol generating article 1000. In some embodiments, the second heating body 32 and the first heating body 31 are in contact and conduct heat to each other.

[0048] In an embodiment, the first heating body 31 and the second heating body 32 are prepared separately and then combined or connected to each other. In an embodiment, the first heating body 31 and the second heating body 32 are not made of the same material as a whole. In an embodiment, the first heating body 31 and the second heating body 32 are arranged continuously; or, the first heating body 31 and the second heating body 32 are not spaced apart.

[0049] In some embodiments, the first heating body 31 is made of a conductive ceramic material. In some embodiments, the first heating body 31 is tubular. In some embodiments, the first heating body 31 is dense. In some specific embodiments, the porosity of the first heating body 31 is less than 5%; more preferably, the porosity of the first heating body 31 is less than 3%. In some embodiments, the wall thickness of the first heating body 31 is between 0.3 and 2.0 mm. In some specific embodiments, the wall thickness of the first heating body 31 is 0.6 mm.

[0050] In some embodiments, the tubular first heating body 31 made of conductive ceramic material is prepared by injection molding the raw material of the conductive ceramic material in a mold, and then sintering and curing it. For example, the preparation process may include: mixing the raw material of the conductive ceramic material with a liquid solvent to form an injectable slurry; then injecting the slurry into the mold cavity of the mold to form a tubular green embryo, demolding the green embryo, and then sintering and curing it to obtain the first heating body 31.

[0051] In some embodiments, the first heating body 31 is formed by independently molding a conductive ceramic material. In an embodiment, the tubular first heating body 31 made of a conductive ceramic material only includes or has a single heating element, rather than a composite heating element formed by combining multiple functional elements of different materials. For example, the composite heating element includes a heating element formed by an electrically insulating substrate (such as an electrically insulating ceramic or surface insulating metal, etc.) providing support, a resistive heating track or coating or etching mesh combined with the surface of the electrically insulating substrate by printing, deposition, wrapping or mounting, etc. In some embodiments, the first heating body 31 is or only includes a conductive ceramic body.

[0052] In some embodiments, the thermal conductivity of the first heating body 31 is designed to be higher than that of conventional ordinary glass or ceramics; generally, the thermal conductivity of glass is about 1W / mk, and generally, the thermal conductivity of ceramics is less than 20W / mk or less than 10W / mk. In an embodiment, the thermal conductivity of the first heating body 31 is greater than 20W / mk; more preferably, the thermal conductivity of the first heating body 31 is between 20 and 50W / mk. In an embodiment, the thermal conductivity of the first heating body 31 is greater than 25W / mk; in some specific embodiments, the thermal conductivity of the first heating body 31 made of conductive ceramic material is between 25 and 40W / mk. Or in some other specific embodiments, the thermal conductivity of the first heating body 31 is about 30W / mk. In an embodiment, by making the thermal conductivity of the first heating body 31 have the above range, it is beneficial to form a temperature field with a difference in the axial direction of the first heating body 31 by arranging the first electrode 313 and the second electrode 314.

[0053] In some embodiments, the relatively improved thermal conductivity of the first heating body 31 is to increase the metal oxide component as a ceramic phase and with relatively high thermal conductivity, such as aluminum oxide, titanium oxide, etc., so that the first heating body 31 reaches the above thermal conductivity. In some embodiments, the relatively improved thermal conductivity of the first heating body 31 is to add a conductive metal such as gold, silver, copper, etc. that improves the thermal conductivity to the conductive ceramic material, so that the first heating body 31 reaches the above thermal conductivity.

[0054] In some embodiments, the resistivity of the first heating body 31 made of conductive ceramic material is between 1×10 -4 Ω·cm~1.3×10 -1 Ω·cm. Figure 2 and Figure 3 In the embodiment, when the current is guided to the first heating body 31 through the first electrode 313 and the second electrode 314, the resistance value of the first heating body 31 measured by the first electrode 313 and the second electrode 314 is between 0.5 and 5Ω. In some preferred embodiments, the resistance value of the first heating body 31 measured by the first electrode 313 and the second electrode 314 is between 0.8 and 1.5Ω. In a specific embodiment, the resistance value of the first heating body 31 measured by the first electrode 313 and the second electrode 314 is approximately 1.0Ω.

[0055] In some embodiments, the battery cell 10 has an output voltage of about 3.7 to 4.5 V; when the circuit board 20 supplies power to the first heating body 31 through the first electrode 313 and the second electrode 314 during use, the working power of the first heating body 31 is about 10 to 40 W.

[0056] In some embodiments, the conductive ceramic material of the first heating body 31 includes a main component and a doping component. In some embodiments, the main component accounts for more than 80% and less than or equal to 98% of the conductive ceramic by mass; the doping component accounts for more than 1% and less than or equal to 20% of the conductive ceramic by mass.

[0057] In some embodiments, the main component includes a first metal oxide, and the doping component includes a second metal oxide; the valence of the metal in the first metal oxide is different from the valence of the metal in the second metal oxide. In some embodiments, the valence of the metal in the first metal oxide is less than the valence of the metal in the second metal oxide; or in some embodiments, the valence of the metal in the first metal oxide is greater than the valence of the metal in the second metal oxide. In some embodiments, the valence of the metal in the second metal oxide is higher than 3.

[0058] In some embodiments, the main component includes zinc oxide; the doping component includes at least one of aluminum oxide, zirconium dioxide, titanium dioxide, or niobium pentoxide. In some embodiments, the mass percentage of zinc oxide in the conductive ceramic is between 94% and 97%. In some embodiments, the doping component includes aluminum oxide, and the mass percentage of aluminum oxide in the conductive ceramic is between 0.5% and 5%.

[0059] In some embodiments, the main component includes titanium dioxide, and the doping component includes at least niobium pentoxide. In some embodiments, the mass percentage of titanium dioxide in the conductive ceramic is between 85% and 95%, and the mass percentage of niobium pentoxide in the conductive ceramic is between 5% and 20%.

[0060] In some embodiments, the host component includes tantalum pentoxide; and the doping component includes at least one of titanium dioxide or zirconium dioxide.

[0061] In some embodiments, the main component includes at least one of a conductive metal boride, a metal nitride, or a metal carbide; and the doping component includes at least one of a non-conductive metal oxide or a metal nitride.

[0062] In some embodiments, the host component includes at least one of titanium boride, titanium nitride, or titanium carbide. In some embodiments, the doping component includes at least one of silicon dioxide and zirconium dioxide.

[0063] In some embodiments, the main component accounts for 20% to 80% of the conductive ceramic by weight. In some embodiments, the doping component accounts for 30% to 80% of the conductive ceramic by weight.

[0064] In some embodiments, the conductive ceramic material of the first heating body 31 further includes a conductive resistivity / thermal conductivity regulating component for controlling the resistivity or thermal conductivity of the conductive ceramic within a target range. In some embodiments, the conductive resistivity / thermal conductivity regulating component includes at least one of a conductive metal carbide, a metal boride, carbon powder, or a conductive metal powder. In some embodiments, the metal carbide includes silicon carbide; and / or the metal boride includes titanium boride. In some embodiments, the conductive metal powder includes at least one of gold powder, silver powder, or copper powder.

[0065] In some embodiments, the conductive resistivity / thermal conductivity adjusting component accounts for 10% to 50% by weight of the conductive ceramic.

[0066] In some optional embodiments, the conductive ceramic material of the first heating body 31 includes 94-97% by mass of zinc oxide, 0.8-5% by mass of aluminum oxide, 0-1% by mass of titanium dioxide, and 0-0.5% by mass of zirconium dioxide.

[0067] In some optional embodiments, the conductive ceramic material of the first heating body 31 includes 85% to 95% by mass of titanium dioxide and 5% to 20% by mass of niobium pentoxide.

[0068] In some optional embodiments, the conductive ceramic material of the first heating body 31 includes 5-10% by mass of titanium boride, 80-90% by mass of zinc oxide, and 1-5% by mass of aluminum oxide.

[0069] In some optional embodiments, the conductive ceramic material of the first heating body 31 includes 50-80% by mass of titanium boride, 20-50% by mass of silicon carbide, and 0.1-2% by mass of silicon dioxide.

[0070] In some optional embodiments, the conductive ceramic material of the first heating body 31 includes 40-70% by mass of titanium boride, 30-60% by mass of zirconium dioxide, and 0.1-5% by mass of silicon dioxide.

[0071] In some optional embodiments, the conductive ceramic material of the first heating body 31 includes 20-50% by mass of titanium boride, 30-50% by mass of zirconium dioxide, and 10-30% by mass of copper powder, silver powder, or gold powder.

[0072] In some embodiments, the thermal conductivity of the second heating body 32 is less than 20 W / mk. In some embodiments, the second heating body 32 is made of metal or alloy, ceramic, etc. In some embodiments, the thermal conductivity of the second heating body 32 is between 10 and 20 W / mk; for example, in some specific embodiments, the second heating body 32 is made of stainless steel with a thermal conductivity of about 17 W / mk.

[0073] In some embodiments, the wall thickness of the second heating body 32 is less than or equal to the wall thickness of the first heating body 31. In some optional embodiments, the wall thickness of the second heating body 32 is between 0.1 and 0.4 mm. For example, in some specific embodiments, the wall thickness of the second heating body 32 is about 0.25 mm.

[0074] In some embodiments, the inner diameters of the first heating body 31 and the second heating body 32 are the same; when the aerosol generating article 1000 is received in the heater 30 for heating, the first heating body 31 and the second heating body 32 are in contact with and against the outer surface of the aerosol generating article 1000.

[0075] In some embodiments, the axial lengths of the first heating body 31 and the second heating body 32 are substantially the same; for example, in some embodiments, the axial lengths of the first heating body 31 and the second heating body 32 are approximately 4 to 8 mm; more specifically, the axial lengths of the first heating body 31 and the second heating body 32 are 6 mm. In some embodiments, the circumference of the first heating body 31 and the second heating body 32 is greater than the axial length.

[0076] according to Figures 2 to 6 As shown, the first heating body 31 includes:

[0077] The first end 311 and the second end 312 are opposite to each other in the axial direction; the first end 311 is arranged toward the opening 40 ; in use, the aerosol generating article 1000 can be received into the first heating body 31 or removed from the first heating body 31 from the first end 311 .

[0078] according to Figures 2 to 6 As shown, the first electrode 313 and the second electrode 314 are combined on the outer surface of the first heating body 31 and are arranged opposite to each other in the radial direction of the first heating body 31 .

[0079] In some embodiments, the first electrode 313 and / or the second electrode 314 include at least one of an electrode ring, an electrode cap, an electrode sheet, a track electrode or an electrode coating. In some embodiments, the first electrode 313 and / or the second electrode 314 are made of a metal or alloy with low resistivity. For example, the first electrode 313 and / or the second electrode 314 include gold, silver, copper or an alloy containing at least one of them. In some embodiments, the first electrode 313 and / or the second electrode 314 are formed by printing or spraying or depositing a conductive paste containing the above low resistivity metal or alloy on the outer surface of the first heating body 31 and then curing it. For example, the first electrode 313 and / or the second electrode 314 are obtained by printing a conductive silver paste on the outer surface of the first heating body 31 and then curing it. In some embodiments, the first electrode 313 and / or the second electrode 314 are arranged in a substantially square or rectangular shape; or in some other variations, the first electrode 313 and / or the second electrode 314 are arranged in a circular, elliptical, polygonal, etc. shape.

[0080] according to Figures 2 to 6 As shown, the first electrode 313 and / or the second electrode 314 are arranged relatively closer to the first end 311. For example, in some embodiments, the first distance between the first electrode 313 and / or the second electrode 314 and the first end 311 is 1.5 mm, and the second distance between the first electrode 313 and / or the second electrode 314 and the second end 312 is 2.5 mm. In this embodiment, the first distance is slightly smaller than the second distance.

[0081] Or in some other embodiments, the first distance between the first electrode 313 and / or the second electrode 314 and the first end 311 is equal to the second distance between the first electrode 313 and / or the second electrode 314 and the second end 312. For example, the first distance and the second distance are 2.0 mm.

[0082] In some embodiments, the first electrode 313 and / or the second electrode 314 has a first dimension or height extending along the axial direction of the first heating body 31 , and the first dimension or height is approximately 2 mm.

[0083] according to Figures 2 to 6 As shown, the first electrode 313 and / or the second electrode 314 has a second dimension or width dimension along the circumferential direction of the first heating body 31, which is greater than the first dimension or height. In some optional embodiments, the second dimension or width dimension is approximately between 3 and 10 mm.

[0084] In an embodiment, the first electrode 313 is electrically connected to the circuit board 20 via an arranged first electrical connection element 351, and the second electrode 314 is electrically connected to the circuit board 20 via an arranged second electrical connection element 352; thereby, in use, the circuit board 20 can operably connect the first electrode 313 and the second electrode 314 to the positive / negative poles of the battery cell 10, respectively, thereby guiding current on the first heating body 31.

[0085] according to Figure 6 As shown in FIG, when the first heating body 31 is powered by the first electrode 313 and the second electrode 314, a current i1 flowing from the first electrode 313 to the second electrode 314 is formed on the first heating body 31. In operation, the current i1 is basically a current in the circumferential direction of the first heating body 31. In the embodiment, the current i1 is mainly located or formed on the first heating body 31, and there is basically no current on the second heating body 32.

[0086] In use according to Figure 6 As shown in FIG. 1 , when the first heating body 31 is powered by the first electrode 313 and the second electrode 314, the first heating body 31 generates heat through the resistance Joule heat. The second heating body 32 itself does not generate heat, but Figure 6 As shown by the middle arrow R1 , heat is generated by receiving heat transferred by the first heating body 31 .

[0087] In some embodiments, the circuit on the circuit board 20 is configured to control the power provided to the first heating body 31 according to a predetermined heating curve, so that the first heating body 31 heats the aerosol generating article 1000 according to the predetermined heating curve. For example, the applicant provides a variety of details about the heating curve of the predetermined time in Chinese patent CN112335940A, etc., and the above documents are fully incorporated herein by reference.

[0088] In the heating process of supplying power to the first heating body 31 through the first electrode 313 and the second electrode 314, the temperature change of the heater 30 includes:

[0089] In the first time stage or preheating stage, the first heating body 31 is heated from room temperature to a predetermined temperature; in the first time stage, since the second heating body 32 can only generate heat by receiving heat transferred by the first heating body 31, the temperature of the first heating body 31 is greater than the temperature of the second heating body 32;

[0090] In the second time stage or heating stage, the first heating body 31 is kept heated within a predetermined temperature range; in the second time stage, the second heating body 32 receives the conducted heat and gradually reaches a temperature that is substantially the same as or similar to that of the second heating body 32 .

[0091] according to Figures 2 to 6 As shown, the second heating body 32 is arranged with:

[0092] The connecting portion 321 and the heating portion 322 are arranged in sequence along the axial direction; the inner diameter of the connecting portion 321 is larger than the inner diameter of the heating portion 322; during assembly, the second heating body 32 is connected to the first heating body 31 through the connecting portion 321. Specifically, a step 323 is formed between the connecting portion 321 and the heating portion 322; during assembly, the second end 312 of the first heating body 31 is inserted into the connecting portion 321 and abuts against the step 323, and then connected to the second heating body 32. In some embodiments, the first heating body 31 and the connecting portion 321 are combined by interference or tight fit.

[0093] according to Figures 2 to 6 As shown, the heater 30 also includes:

[0094] The temperature sensor 38, such as a thermocouple, PT1000, or thermistor, is combined on the outer surface of the first heating body 31 to sense the temperature of the first heating body 31. In an embodiment, the temperature sensor 38 is away from the first electrode 313 and the second electrode 314. Figure 2 In the embodiment, the temperature sensor 38 is located between the first electrode 313 and the second electrode 314 .

[0095] In an embodiment, the temperature sensor 38 is welded or connected to the circuit board 20 via conductive wires, so that the circuit board 20 can receive the sensing result of the temperature sensor 38 and control the power provided to the first heating body 31 according to the sensing result of the temperature sensor 38 .

[0096] according to Figures 2 to 6 As shown, the heater 30 also includes:

[0097] A proximal end 310 disposed toward or close to the opening 40, and a distal end 320 axially away from the proximal end 310; the first heating body 31 and the second heating body 32 are sequentially arranged from the proximal end 310 to the distal end 320;

[0098] A flexible first sealing element 33, such as a silicone sealing ring, is located at the proximal end 310 and is coupled to the first end 311 of the first heating body 31; the aerosol generating device 100 at least partially holds the heater 30 by clamping or holding the first sealing element 33; the first sealing element 33 is basically configured to be annular in shape;

[0099] The flexible second sealing element 34 , such as a silicone sealing ring, is configured to be substantially annular in shape; the second sealing element 34 at least partially surrounds or wraps the first heating body 31 and the connecting portion 321 from the outside to provide sealing for their joint gap.

[0100] according to Figures 2 to 6 As shown, the heater 30 also includes:

[0101] A first electrical connection element 351, used to provide an electrical connection between the circuit board 20 and the first electrode 313;

[0102] The second electrical connection element 352 is used to provide an electrical connection between the circuit board 20 and the second electrode 314 .

[0103] according to Figures 2 to 6 As shown, the first electrical connection element 351 and / or the second electrical connection element 352 are configured to be in a longitudinal shape. The first electrical connection element 351 elastically abuts against and contacts the first electrode 313, thereby conducting electricity with the first electrode 313. The second electrical connection element 352 elastically abuts against and contacts the second electrode 314, thereby conducting electricity with the second electrode 314.

[0104] In some embodiments, the first electrical connection element 351 and / or the second electrical connection element 352 are formed by continuously bending a conductive sheet of metal or alloy. For example, in some embodiments, the first electrical connection element 351 and / or the second electrical connection element 352 are formed by bending a copper sheet.

[0105] according to Figures 2 to 6 As shown, the first electrical connection element 351 includes:

[0106] The abutment end 3511 is arranged perpendicular to the longitudinal direction of the first electrical connection element 351 and is used to abut against the first sealing element 33 in the longitudinal direction;

[0107] The electrical contact part 3512 is basically arranged along the longitudinal extension of the first electrical connection element 351, and is at least partially arc-shaped or elastically bent; the electrical contact part 3512 elastically abuts against the first electrode 313 to form electrical conduction with the first electrode 313; after assembly, the electrical contact part 3512 is longitudinally held between the first sealing element 33 and the second sealing element 34;

[0108] The extension portion 3513 is arranged along the longitudinal extension of the first electrical connection element 351; and the extension portion 3513 extends from the electrical contact portion 3512 to the outside of the distal end 320 of the heater 30, and then connected to the circuit board 20 by welding or other methods.

[0109] The width of the electrical contact part 3512 is greater than the width of other parts of the first electrical connection element 351; or, the electrical contact part 3512 of the first electrical connection element 351 has an increased width, so that the electrical contact part 3512 can have a suitable contact area and stably contact and conduct electricity with the first electrode 313, which is beneficial.

[0110] In some embodiments, the electrical contact portion 3512 has a plurality of through holes, which is beneficial for facilitating the electrical contact portion 3512 to bend more easily during preparation, thereby generating elasticity.

[0111] In some embodiments, the second electrical connection element 352 has the same shape and structure as the first electrical connection element 351 , and after assembly, the electrical contact portion of the second electrical connection element 352 elastically abuts against the second electrode 314 to form electrical conduction.

[0112] In some embodiments, the heater 30 may further include:

[0113] The fastening element surrounds or wraps the first electrical connection element 351 and / or the second electrical connection element 352 from the outside, so as to stably combine the first electrical connection element 351 and / or the second electrical connection element 352 to the outside of the first heating body 31 .

[0114] 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

1. An aerosol generating device, configured to heat an aerosol generating article to generate an aerosol; characterized in that: include: a chamber for receiving the aerosol-generating article; A first heating body and a second heating body are arranged continuously along the longitudinal direction of the chamber, and the first heating body and the second heating body are arranged around at least a part of the chamber; Battery cells, used for power supply; A circuit operable to provide power from the battery cell to the first heating body so that the first heating body generates heat to heat the aerosol generating article; The second heating body is thermally connected to the first heating body and heats the aerosol generating article by receiving heat transferred by the first heating body.

2. The aerosol generating device according to claim 1, characterized in that The chamber has an opening through which an aerosol-generating article can be at least partially received in or removed from the chamber in use; the first heating body is closer to the opening than the second heating body.

3. The aerosol generating device according to claim 1 or 2, characterized in that: The first heating body is a conductive ceramic heating body; and / or the second heating body is a stainless steel member.

4. The aerosol generating device according to claim 1 or 2, characterized in that: The thermal conductivity of the second heating body is smaller than the thermal conductivity of the first heating body.

5. The aerosol generating device according to claim 1 or 2, characterized in that: The thermal conductivity of the first heating body is greater than 20 W / mk; and / or the thermal conductivity of the first heating body is between 25 and 40 W / mk; And / or, the thermal conductivity of the second heating body is less than 20 W / mk; and / or, the thermal conductivity of the second heating body is between 10 and 20 W / mk.

6. The aerosol generating device according to claim 1 or 2, characterized in that: The second heating body has a connecting portion for connecting with the first heating body; the connecting portion is arranged around a portion of the first heating body and is connected to the first heating body by interference fit or tight fit.

7. The aerosol generating device according to claim 1 or 2, characterized in that: Also includes: A first electrode and a second electrode are arranged at intervals along the circumference of the first heating body to guide current on the first heating body; The circuit is arranged to supply power of the battery cell to the first heating body by connecting one of the first electrode and the second electrode to the positive electrode of the battery cell and the other to the negative electrode of the battery cell.

8. The aerosol generating device according to claim 1 or 2, characterized in that: The first heating body is configured to be tubular; and / or, the circumference of the first heating body is greater than the axial length of the first heating body; And / or, the second heating body is configured to be tubular; And / or, the circumference of the second heating body is greater than the axial length of the second heating body.

9. The aerosol generating device according to claim 1 or 2, characterized in that: The wall thickness of the first heating body is greater than or equal to the wall thickness of the second heating body.

10. A heater for an aerosol generating device, characterized in that: include: A first heating body and a second heating body are arranged in sequence in a longitudinal direction; the first heating body and the second heating body are configured in a tubular shape; The first heating body is provided with a first electrode and a second electrode which are arranged at intervals in the circumferential direction, so as to guide the current on the first heating body, thereby enabling the first heating body to generate heat through Joule heat; The second heating body is thermally connected to the first heating body, and can generate heat by receiving heat transferred by the first heating body; The thermal conductivity of the second heating body is smaller than the thermal conductivity of the first heating body.

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