Aerosol generating device and heater for aerosol generating device

Abstract

The invention provides an aerosol generating device and a heater for the aerosol generating device. The aerial fog generating device comprises a chamber, a gas generator and a gas generator, a heating body surrounding or defining at least a portion of the chamber and for heating the aerosol-generating article; the heating body comprises a first end close to the opening and a second end deviating from the first end; the first electrode and the second electrode are longitudinally arranged on the heating body at intervals; the first electrode and the second electrode extend in the circumferential direction of the heating body, at least part of the first electrode is opposite to at least part of the second electrode in the longitudinal direction of the heating body, and then current is guided by the first electrode and the second electrode in the longitudinal direction of the heating body; the first electrode is closer to the first end than the second electrode; the distance between the second electrode and the first end is smaller than that between the second electrode and the second end. According to the aerial fog generating device, the current is longitudinally guided only on the part, close to the first end, of the heating body, and a gradient temperature field is favorably formed in the longitudinal direction.

Description

Technical Field

[0001] This application relates to the field of heated non-combustible aerosol generation technology, and in particular to an aerosol generation device and a heater for the aerosol generation device. Background Technology

[0002] Tobacco products (such as cigarettes, cigars, etc.) produce tobacco smoke by burning tobacco during use. Efforts are being made to replace these tobacco-burning products by creating products that release compounds without combustion.

[0003] Examples of such products are heating devices that release compounds by heating rather than burning materials. For instance, the material could be an aerosol-generating article containing tobacco or other non-tobacco products, which may or may not contain nicotine. Known heating devices contain and heat the aerosol-generating article within a tubular heating body made of a conductive ceramic material, with annular electrodes arranged at opposite longitudinal ends of the tubular conductive ceramic heating body, thereby guiding current along the entire longitudinal direction of the tubular heating body to generate Joule heating. Summary of the Invention

[0004] One embodiment of this application provides an aerosol generating apparatus configured to heat an aerosol generating article to generate an aerosol; comprising:

[0005] A chamber having an opening; in use, the aerosol-generating article can be at least partially received into or removed from the chamber through the opening;

[0006] A heating element surrounds or defines at least a portion of the chamber and is used to heat the aerosol-generating article; the heating element includes a first end near the opening and a second end away from the first end;

[0007] A first electrode and a second electrode are arranged at intervals on the heating element along its longitudinal direction; the first electrode and the second electrode extend circumferentially along the heating element, at least a portion of the first electrode is opposite to at least a portion of the second electrode in the longitudinal direction of the heating element, thereby guiding current in the longitudinal direction of the heating element during use; the first electrode is closer to the first end than the second electrode, or the first electrode is located between the first end and the second electrode; the distance between the second electrode and the first end is less than the distance between the second electrode and the second end.

[0008] In some embodiments, the heating element is prepared by molding and sintering a conductive ceramic material;

[0009] Alternatively, the heating element may be a conductive ceramic body.

[0010] In some embodiments, the temperature coefficient of resistance of the heating element material is between -1500 and -2500 ppm / ℃.

[0011] In some embodiments, the thermal conductivity of the heating element is greater than 20 W / mk.

[0012] In some embodiments, the first electrode and / or the second electrode are closed rings.

[0013] In some embodiments, the first electrode and / or the second electrode are configured to be non-closed in the circumferential direction;

[0014] The first electrode has a first notch, and / or the second electrode has a second notch.

[0015] In some embodiments, the first notch and the second notch are staggered in the longitudinal direction of the heating element.

[0016] In some embodiments, the arc of the first notch and / or the second notch extending circumferentially along the heating element is between 0.1π and 0.8π.

[0017] In some embodiments, the arc of the first electrode and / or the second electrode extending circumferentially along the heating element is between 0.03π and 2π.

[0018] In some embodiments, the first electrode and the second electrode extend in the same arc along the circumferential direction of the heating element;

[0019] Alternatively, the first electrode and the second electrode may extend at different circumferential arcs along the heating element.

[0020] In some embodiments, the first electrode has at least one first segment, and the second electrode has at least one second segment; at least one first segment and at least one second segment are opposite each other in the longitudinal direction of the heating element.

[0021] In some embodiments, the first segment and / or the second segment extend in circumferential arc of the heating element by 0.03π to 1.75π.

[0022] In some embodiments, the first electrode has two spaced first segments, and the second electrode has two spaced second segments.

[0023] In some embodiments, it also includes:

[0024] A conductive transition adhesive layer is formed or disposed between the first electrode and / or the second electrode and the heating element to provide adhesion between the first electrode and / or the second electrode and the heating element.

[0025] In some embodiments, the thickness of the transition adhesive layer is between 0.01 mm and 1.0 mm.

[0026] In some embodiments, the coefficient of thermal expansion of the transition adhesive layer is less than that of the first electrode and / or the second electrode.

[0027] In some embodiments, there is a first distance between the first electrode and the first end, a second distance between the first electrode and the second electrode, and a third distance between the second electrode and the second end; the second distance is greater than the first distance and the second distance is less than the third distance.

[0028] In some embodiments, the heating element includes:

[0029] A first portion, adjacent to or defining the first end; a second portion, adjacent to or defining the second end; the first electrode and / or the second electrode are disposed on the first portion and away from the second portion;

[0030] When current is guided through the first electrode and the second electrode on the heating element, the first part can generate heat through resistive Joule heating, and the second part generates heat by receiving the heat transferred from the first part.

[0031] In some embodiments, the heating element does not have electrodes for guiding current on the second portion.

[0032] Another embodiment of this application also proposes an aerosol generating device, configured to heat an aerosol generating article to generate an aerosol; comprising:

[0033] A chamber having an opening; in use, the aerosol-generating article can be at least partially received into or removed from the chamber through the opening;

[0034] A heating element surrounds or defines at least a portion of the chamber and is used to heat an aerosol-generating article; a first electrode and a second electrode are arranged on the heating element at longitudinal intervals; the first electrode and the second electrode are arranged to extend circumferentially along the heating element, with at least a portion of the first electrode facing at least a portion of the second electrode in the longitudinal direction of the heating element, thereby guiding current in the longitudinal direction of the heating element by the first electrode and the second electrode during use;

[0035] The first electrode and / or the second electrode are configured to be non-closed in the circumferential direction.

[0036] Another embodiment of this application also proposes an aerosol generating device, configured to heat an aerosol generating article to generate an aerosol; comprising:

[0037] A chamber having an opening; in use, the aerosol-generating article can be at least partially received into or removed from the chamber through the opening;

[0038] A heating element made of conductive ceramic material surrounds or defines at least a portion of the chamber and is used to heat an aerosol-generating article; the heating element includes a first portion and a second portion arranged sequentially in a longitudinal direction;

[0039] A first electrode and a second electrode are arranged longitudinally at intervals on the first portion and away from the second portion; the first electrode and the second electrode are arranged to extend circumferentially along the heating body, so that in use, the first electrode and the second electrode guide current on the first portion, so that the first portion heats the aerosol-generated article by resistive Joule heating; the second portion heats up by receiving the heat transferred from the first portion, thereby heating the aerosol-generated article.

[0040] Another embodiment of this application also proposes an aerosol generating device, configured to heat an aerosol generating article to generate an aerosol; comprising:

[0041] A chamber having an opening; in use, the aerosol-generating article can be at least partially received into or removed from the chamber through the opening;

[0042] A heating element surrounds or defines at least a portion of the chamber and is used to heat the aerosol-generated article;

[0043] The first electrode and the second electrode are arranged at intervals on the heating element for guiding current on the heating element;

[0044] A conductive transition adhesive layer is formed or disposed between the first electrode and / or the second electrode and the heating element to provide adhesion between the first electrode and / or the second electrode and the heating element.

[0045] Another embodiment of this application provides a heater for an aerosol generating device, comprising:

[0046] The first and second ends, which are opposite each other along the longitudinal direction;

[0047] A tubular heating element extends from the first end to the second end;

[0048] A first electrode and a second electrode are arranged at intervals on the heating element along its longitudinal direction; the first electrode and the second electrode extend circumferentially along the heating element, at least a portion of the first electrode is opposite to at least a portion of the second electrode in the longitudinal direction of the heating element, thereby guiding current in the longitudinal direction of the heating element during use; the first electrode is closer to the first end than the second electrode, or the first electrode is located between the first end and the second electrode; the distance between the second electrode and the first end is less than the distance between the second electrode and the second end.

[0049] Another embodiment of this application provides a heater for an aerosol generating device, comprising:

[0050] Tubular heating element;

[0051] A first electrode and a second electrode are arranged at intervals on the heating body along the longitudinal direction of the heating body; the first electrode and the second electrode are arranged to extend circumferentially along the heating body, and at least a portion of the first electrode is opposite to at least a portion of the second electrode in the longitudinal direction of the heating body, thereby guiding current in the longitudinal direction of the heating body by the first electrode and the second electrode during use;

[0052] The first electrode and / or the second electrode are configured to be non-closed in the circumferential direction.

[0053] Another embodiment of this application provides a heater for an aerosol generating device, comprising:

[0054] A tubular heating element made of conductive ceramic material; the heating element includes a first part and a second part arranged sequentially along the longitudinal direction;

[0055] A first electrode and a second electrode are arranged longitudinally at intervals on the first portion and away from the second portion; the first electrode and the second electrode are arranged to extend circumferentially along the heating body, so that in use, the first electrode and the second electrode guide current on the first portion, so that the first portion heats the aerosol-generated article by resistive Joule heating; the second portion heats up by receiving the heat transferred from the first portion, thereby heating the aerosol-generated article.

[0056] Another embodiment of this application provides a heater for an aerosol generating device, comprising:

[0057] Tubular heating element;

[0058] The first electrode and the second electrode are arranged at intervals on the heating element for guiding current on the heating element;

[0059] A conductive transition adhesive layer is formed or disposed between the first electrode and / or the second electrode and the heating element to provide adhesion between the first electrode and / or the second electrode and the heating element.

[0060] The above-described aerosol generating device guides the current longitudinally only in the portion of the heating element near the first end, which is advantageous for creating a gradient temperature field in the longitudinal direction. Attached Figure Description

[0061] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0062] Figure 1 This is a schematic diagram of an aerosol generating device provided in one embodiment;

[0063] Figure 2 yes Figure 1 A schematic diagram of the structure of the heater from one perspective;

[0064] Figure 3 yes Figure 2 A schematic diagram of the circumferential unfolding view of the central heater;

[0065] Figure 4 This is a schematic diagram of the heater from one perspective of yet another embodiment;

[0066] Figure 5 yes Figure 4 An exploded view of the heater from one perspective;

[0067] Figure 6 yes Figure 4 A schematic diagram of the circumferential unfolding view of the central heater;

[0068] Figure 7 This is a schematic diagram of the heater in circumferential unfolding view of yet another embodiment;

[0069] Figure 8 This is a schematic diagram of the heater from one perspective of another embodiment. Detailed Implementation

[0070] To facilitate understanding of this application, a more detailed description of this application will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0071] One embodiment of this application provides an aerosol generating device 100 that heats, rather than burns, an aerosol generating article 100, such as a cigarette, to cause at least one component of the aerosol generating article 1000 to volatilize or release, forming an aerosol for inhalation. Figure 1 As shown.

[0072] In optional embodiments, the aerosol-generating article 1000 preferably uses a tobacco-containing material from which volatile compounds are released from the matrix upon heating; or it may be a non-tobacco material suitable for electric heating and smoke generation after heating. The aerosol-generating article 1000 preferably uses a solid matrix, which may include one or more of the following: powder, granules, fragments, strips, or sheets of vanilla leaves, tobacco leaves, homogenized tobacco, expanded tobacco, dried flowers, tea leaves, etc.; or, the solid matrix may contain additional tobacco or non-tobacco volatile aroma compounds to be released when the matrix is ​​heated.

[0073] according to Figure 1 As shown, when the aerosol generating product 1000 is received by the aerosol generating device 100, a portion of it, such as a filter tip, protrudes outside the aerosol generating device 100, which is advantageous for the user to inhale.

[0074] The structure of the aerosol generating device 100 according to one embodiment of this application can be found in [reference needed]. Figure 1 As shown, the overall shape of the device is generally elongated. The aerosol generating device 100 includes:

[0075] The chamber has an opening 40; in use, the aerosol-generating article 1000 can be removably received in the chamber through the opening 40.

[0076] The heater 30 is arranged to at least partially surround or define the chamber; when the aerosol generating article 1000 is received in the chamber, the heater 30 surrounds and heats the aerosol generating article 1000 from the outside, thereby causing the aerosol generating article 1000 to release a variety of volatile compounds, which are formed only by heat treatment.

[0077] The battery cell 10 is used for power supply; more preferably, the battery cell 10 is a rechargeable DC battery cell 10, which can be charged by connecting to an external power source.

[0078] Circuit board 20, such as a PCB board or FPC board, has circuitry arranged for guiding current between cell 10 and heater 30.

[0079] exist Figure 1 and Figure 2In the illustrated embodiment, the heater 30 is arranged in a tubular shape, and at least a portion of the tubular hollow portion of the heater 30 forms or defines a chamber for receiving the aerosol generating article 1000. 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 it from its outer periphery. Furthermore, when the aerosol generating article 1000 is received in the chamber, it is at least partially contained and held within the heater 30.

[0080] In some embodiments, the heater 30 may have an inner diameter d11 of approximately 5.8 mm to 10 mm. In some embodiments, the heater 30 may have a length d12 of approximately 10 mm to 15 mm. In embodiments, the circumferential length or circumference of the heater 30 is greater than the longitudinal length d12 of the heater 30. In some embodiments, the longitudinal length d12 of the heater 30 is not more than 15 mm or less; preferably, the longitudinal length d12 of the heater 30 is between 9 and 15 mm. In some specific embodiments, the heater 30 may have an inner diameter d11 of 7.6 mm; the heater 30 may have a length d12 of 11 mm.

[0081] exist Figure 2 and Figure 3 In the illustrated embodiment, the heater 30 includes:

[0082] A tubular heating element 31 made of conductive ceramic material; and,

[0083] A first electrode 321 and a second electrode 322 are formed on the outer surface of the heating element 31.

[0084] In some embodiments, the heating element 31 is dense. In some specific embodiments, the porosity of the heating element 31 is less than 5%; more preferably, the porosity of the heating element 31 is less than 3%.

[0085] In some embodiments, the wall thickness of the heating element 31 is between 0.3 and 2.0 mm. In some specific embodiments, the wall thickness of the heating element 31 is 0.6 mm.

[0086] In some embodiments, the tubular heating element 31 made of conductive ceramic material is prepared by injection molding the raw material of conductive ceramic material into a mold and then sintering and solidifying it. For example, the preparation process may include: mixing the raw material of conductive ceramic material with a liquid solvent to form an injectable slurry; then injecting the slurry into the cavity of the mold to form a tubular green body; demolding to obtain the green body and then sintering and solidifying it to obtain the heating element 31.

[0087] In some embodiments, the heating element 31 is independently molded from a conductive ceramic material. Therefore, in these embodiments, the tubular heating element 31 made of conductive ceramic material includes or has only a single heating element, rather than a composite heating element formed by combining multiple functional elements of different materials. For example, a composite heating element may include a supporting electrically insulating substrate (e.g., electrically insulating ceramic or surface insulating metal), a heating element formed by printing, depositing, wrapping, or mounting resistance heating traces, coatings, or etched meshes bonded to the surface of the electrically insulating substrate. In some embodiments, the heating element 31 is or only includes a conductive ceramic body.

[0088] In some embodiments, the thermal conductivity of the heating element 31 is designed to be higher than that of conventional glass or ceramics; typically, the thermal conductivity of glass is approximately 1 W / mK, and the thermal conductivity of ceramics is typically less than 20 W / mK or even lower, less than 10 W / mK. In this embodiment, the thermal conductivity of the heating element 31 is greater than 20 W / mK; more preferably, the thermal conductivity of the heating element 31 is between 20 and 50 W / mK.

[0089] In some embodiments, the thermal conductivity of the heating element 31 is greater than 25 W / mK; in some specific embodiments, the thermal conductivity of the heating element 31, made of conductive ceramic material, is between 25 and 40 W / mK. Alternatively, in still other specific embodiments, the thermal conductivity of the heating element 31 is approximately 30 W / mK. In these embodiments, by having the thermal conductivity of the heating element 31 within the above range, it is advantageous for creating Joule heating and a temperature field difference in a portion of the heating area by arranging the first electrode 321 and the second electrode 322.

[0090] In some embodiments, the relatively improved thermal conductivity of the heating element 31 is achieved by increasing the content of a metal oxide component with relatively high thermal conductivity, such as alumina or titanium oxide, which is a ceramic phase, thereby enabling the heating element 31 to achieve the above-mentioned thermal conductivity. In some embodiments, the relatively improved thermal conductivity of the heating element 31 is achieved by adding a conductive metal, such as gold, silver, or copper, that improves thermal conductivity to the conductive ceramic material, thereby enabling the heating element 31 to achieve the above-mentioned thermal conductivity.

[0091] In some embodiments, the resistivity of the heating element 31, made of conductive ceramic material, is between 1 × 10⁻⁶. -4 Ω·cm~1.3×10 -1 Ω·cm. In Figure 2 and Figure 3In some embodiments, when current is guided through the first electrode 321 and the second electrode 322 into the heating element 31, the resistance value of the heating element 31 measured by the first electrode 321 and the second electrode 322 is between 0.5 and 5 Ω. In some preferred embodiments, the resistance value of the heating element 31 measured by the first electrode 321 and the second electrode 322 is between 0.8 and 1.5 Ω. In one specific embodiment, the resistance value of the heating element 31 measured by the first electrode 321 and the second electrode 322 is approximately 1.4 Ω.

[0092] In some embodiments, the battery cell 10 has an output voltage of approximately 3.7 to 4.5V; then, during use, when the circuit board 20 supplies power to the heating element 31 through the first electrode 321 and the second electrode 322, the operating power of the heating element 31 is approximately between 10 and 40W.

[0093] In some embodiments, the conductive ceramic material of the heating element 31 includes a main component and a doped component. In some embodiments, the main component accounts for a mass percentage of the conductive ceramic that is greater than 80% and less than or equal to 98%; the doped component accounts for a mass percentage of the conductive ceramic that is greater than 1% and less than or equal to 20%.

[0094] In some embodiments, the main component includes a first metal oxide, and the dopant 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 valence tri.

[0095] In some embodiments, the main component includes zinc oxide; the dopant includes at least one selected from aluminum oxide, zirconium dioxide, titanium dioxide, or niobium pentoxide. In some embodiments, zinc oxide accounts for 94% to 97% of the mass of the conductive ceramic. In some embodiments, the dopant includes aluminum oxide, which accounts for 0.5% to 5% of the mass of the conductive ceramic.

[0096] In some embodiments, the main component includes titanium dioxide; the dopant component includes at least niobium pentoxide. In some embodiments, the mass percentage of titanium dioxide in the conductive ceramic is between 85% and 95%; the mass percentage of niobium pentoxide in the conductive ceramic is between 5% and 20%.

[0097] In some embodiments, the main component includes tantalum pentoxide; the dopant component includes at least one of titanium dioxide or zirconium dioxide.

[0098] In some embodiments, the main component includes at least one of a conductive metal boride, metal nitride, or metal carbide; the dopant component includes at least one of a non-conductive metal oxide or metal nitride.

[0099] In some embodiments, the main component includes at least one of titanium boride, titanium nitride, or titanium carbide. In some embodiments, the dopant includes at least one of silicon dioxide or zirconium dioxide.

[0100] In some embodiments, the main component accounts for 20% to 80% of the mass percentage of the conductive ceramic. In some embodiments, the dopant component accounts for 30% to 80% of the mass percentage of the conductive ceramic.

[0101] In some embodiments, the conductive ceramic material of the heating element 31 further includes a conductive resistivity / thermal conductivity regulating component to control 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 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.

[0102] In some embodiments, the conductive resistivity / thermal conductivity modulating component accounts for 10% to 50% of the mass percentage of the conductive ceramic.

[0103] In some optional embodiments, the conductive ceramic material of the heating element 31 includes 94-97% zinc oxide, 0.8-5% aluminum oxide, 0-1% titanium dioxide, and 0-0.5% zirconium dioxide by mass.

[0104] In some optional embodiments, the conductive ceramic material of the heating element 31 includes 85% to 95% titanium dioxide and 5% to 20% niobium pentoxide by mass.

[0105] In some optional embodiments, the conductive ceramic material of the heating element 31 includes 5-10% by mass titanium boride, 80-90% by mass zinc oxide, and 1-5% by mass aluminum oxide.

[0106] In some optional embodiments, the conductive ceramic material of the heating element 31 includes 50-80% by mass titanium boride, 20-50% by mass silicon carbide, and 0.1-2% by mass silicon dioxide.

[0107] In some optional embodiments, the conductive ceramic material of the heating element 31 includes 40-70% titanium boride, 30-60% zirconium dioxide, and 0.1-5% silicon dioxide by mass.

[0108] In some optional embodiments, the conductive ceramic material of the heating element 31 includes 20-50% by mass titanium boride, 30-50% by mass zirconium dioxide, and 10-30% by mass copper powder, silver powder, or gold powder.

[0109] In some embodiments, the heating element 31, made of conductive ceramic material, has a negative temperature coefficient of resistance. Therefore, during operation, as the temperature of the heating element 31 rises, its resistance decreases. For example, in some embodiments, the temperature coefficient of resistance of the heating element 31 made of conductive ceramic material is between -1500 and -2500 ppm / ℃. Figure 2 and Figure 3 In the embodiment shown, when current is guided through the first electrode 321 and the second electrode 322 on the heating element 31 at room temperature, the initial resistance of the heating element 31 is 1.4Ω; when the temperature of the heating element 31 rises to about 350°C, the resistance of the heating element 31 decreases to about 0.5Ω.

[0110] according to Figure 2 and Figure 3 As shown, the heating element 31 includes:

[0111] A first end 310 and a second end 320 are opposite to each other in the longitudinal direction. The first end 310 is arranged toward the opening 40; in use, the aerosol generating article 1000 can be received into or removed from the heating body 31 from the first end 310.

[0112] according to Figure 2 and Figure 3 As shown, the heating element 31 further includes a first portion 311 and a second portion 312 arranged longitudinally; wherein the first portion 311 is adjacent to or defines the first end 310, and the second portion 312 is adjacent to and defines the second end 320. In the embodiment, the first portion 311 and the second portion 312 are continuous; there is no separation or separation boundary between the first portion 311 and the second portion 312.

[0113] Alternatively, in some other embodiments, a transition bonding layer is provided between the first electrode 321 and / or the second electrode 322 and the heating element 31; in the embodiments, the transition bonding layer forms a tight bond between the metallic first electrode 321 and / or the second electrode 322 and the ceramic heating element 31.

[0114] In some embodiments, the thickness of the transition adhesive layer is approximately 0.01 mm to 1.0 mm. Alternatively, in a more preferred embodiment, the thickness of the transition adhesive layer is approximately 0.05 mm to 0.8 mm.

[0115] In some embodiments, the coefficient of thermal expansion of the transition adhesive layer is less than that of the first electrode 321 and / or the second electrode 322. This is advantageous for suppressing deformation of the first electrode 321 and / or the second electrode 322 during use.

[0116] In some embodiments, the transition adhesive layer is conductive.

[0117] For example, in some embodiments, the material of the transition adhesive layer can be a metal or an alloy, such as silver, aluminum, titanium, or alloys thereof.

[0118] For example, in some embodiments, the transition bonding layer can be a composite material of ceramics and metals. This allows the transition bonding layer to simultaneously possess material compatibility with both the metallic first electrode 321 and / or the second electrode 322, and the ceramic heating element 31. For instance, in some optional embodiments, the transition bonding layer material may include 10-80% metal and 20-90% ceramics. The metal in the transition bonding layer may include at least one of gold, silver, copper, aluminum, nickel, titanium, zirconium, platinum, etc. The ceramic in the transition bonding layer may include oxides or nitrides such as alumina, zirconium oxide, titanium oxide, iron oxide, and silicon oxide.

[0119] In some embodiments, the transition adhesive layer is obtained by printing or coating the above materials onto the outer surface of the heating element 31 and then sintering it.

[0120] according to Figure 2 and Figure 3 As shown, the first electrode 321 and the second electrode 322 are bonded to the outer surface of the heating element 31 and are arranged at intervals along the longitudinal direction of the heating element 31.

[0121] according to Figure 2 and Figure 3 As shown, the first electrode 321 and / or the second electrode 322 are arranged extending circumferentially along the heating element 31. The first electrode 321 and / or the second electrode 322 are annular around the heating element 31. According to... Figure 2 and Figure 3 As shown, the first electrode 321 and / or the second electrode 322 are closed in the circumferential direction; or, the first electrode 321 and / or the second electrode 322 are closed rings.

[0122] In some embodiments, the first electrode 321 and / or the second electrode 322 includes 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 321 and / or the second electrode 322 is made of a metal or alloy with low resistivity. For example, the first electrode 321 and / or the second electrode 322 includes gold, silver, copper, or an alloy containing at least one of them. In some embodiments, the first electrode 321 and / or the second electrode 322 are obtained by forming a conductive paste containing the aforementioned low-resistivity metal or alloy on the outer surface of the heating element 31 by printing, spraying, or depositing, and then curing it. For example, the first electrode 321 and / or the second electrode 322 are obtained by printing conductive silver paste on the outer surface of the heating element 31 and then curing it.

[0123] according to Figure 2 and Figure 3 As shown, the first electrode 321 and / or the second electrode 322 are located in the first portion 311 of the heating element 31 and avoid the second portion 312. The second portion 312 has no electrodes for conducting current thereon.

[0124] according to Figure 2 and Figure 3 As shown, the first electrode 321 is closer to the first end 310 than the second electrode 322. According to... Figure 2 and Figure 3 As shown, the distance between the first electrode 321 and / or the second electrode 322 and the first end 310 is less than the distance to the second end 320. The first electrode 321 and / or the second electrode 322 are arranged closer to the first end 310; and the first electrode 321 and / or the second electrode 322 are farther away from the second end 320.

[0125] exist Figure 2 and Figure 3 In the first electrode 321, there is a first distance d31 between the first electrode 321 and the first end 310. There is a second distance d32 between the first electrode 321 and the second electrode 322. There is a third distance d33 between the second electrode 322 and the second end 320.

[0126] In some embodiments, the first spacing d31 is smaller than the third spacing d33 between the second electrode 322 and the second end 320. The first spacing d31 is smaller than the second spacing d32. The second spacing d32 is smaller than the third spacing d33.

[0127] In some embodiments, the first spacing d21 is between 0.5 and 2.0 mm. The second spacing d32 is between 1 and 4 mm. In some optional embodiments, the first spacing d21 is approximately 1 mm. The second spacing d32 is approximately 2 mm. Alternatively, in some embodiments, the ratio of the second spacing d32 to the longitudinal length of the heating element 31 is between 5% and 50%; or in a more preferred embodiment, the ratio of the second spacing d32 to the longitudinal length of the heating element 31 is between 5% and 40%.

[0128] exist Figure 2 and Figure 3 In this embodiment, the ratio of the third distance d33 between the second electrode 322 and the second end 320 to the longitudinal length of the heating element 31 is between 0% and 85%. Alternatively, in a more preferred embodiment, the ratio of the third distance d33 to the longitudinal length of the heating element 31 is between 40% and 80%.

[0129] In some embodiments, the dimensions of the first electrode 321 and / or the second electrode 322 along the longitudinal direction of the heating element 31 are between 1 and 4 mm. In some optional embodiments, the dimensions of the first electrode 321 and / or the second electrode 322 along the longitudinal direction of the heating element 31 are approximately 2 mm. In some optional embodiments, the ratio of the dimensions of the first electrode 321 and / or the second electrode 322 along the longitudinal direction of the heating element 31 to the longitudinal length of the heating element 31 is between 1% and 40%; more preferably, the ratio of the dimensions of the first electrode 321 and / or the second electrode 322 along the longitudinal direction of the heating element 31 to the longitudinal length of the heating element 31 is between 5% and 40%; more preferably, the ratio of the dimensions of the first electrode 321 and / or the second electrode 322 along the longitudinal direction of the heating element 31 to the longitudinal length of the heating element 31 is between 10% and 30%.

[0130] In the embodiment, the first electrode 321 and the second electrode 322 are electrically connected to the circuit board 20 by welding conductive leads, etc.; thus, in use, the circuit board 20 can operably connect the first electrode 321 and the second electrode 322 to the positive / negative poles of the battery cell 10 respectively, thereby guiding current on the heating element 31.

[0131] according to Figure 3 As shown, when the heating element 31 is powered through the first electrode 321 and the second electrode 322, a current i1 is formed on the heating element 31 flowing from the first electrode 321 to the second electrode 322. The current i1 is substantially along the longitudinal direction of the heating element 31. In operation, the current i1 is essentially a current along the longitudinal direction of the heating element 31. In this embodiment, the current i1 is primarily located in or formed in the first portion 311 of the heating element 31, while the second portion 312 is essentially free of current.

[0132] In this embodiment, the heater 30 includes only a first electrode 321 and a second electrode 322. Therefore, in use, when power is supplied to the heating element 31 through the first electrode 321 and the second electrode 322, the first portion 311 of the heating element 31 heats up through resistive Joule heating. The second portion 312 itself generates virtually no heat, but rather... Figure 3 The heating element 31 generates heat by receiving heat transferred from the first part 311, as indicated by the middle arrow R1. There are no electrodes on the second part 312 that conduct current.

[0133] In some embodiments, the circuitry on the circuit board 20 is configured to control the supply of power to the heating element 31 according to a predetermined heating curve, thereby causing the heating element 31 to heat the aerosol-generating article 1000 according to the predetermined heating curve. For example, the applicant has provided details of various heating curves for predetermined times in Chinese Patent CN112335940A, etc., the full text of which is incorporated herein by reference.

[0134] During use, in the heating process where the heating element 31 is powered by the first electrode 321 and the second electrode 322, the temperature changes of the first part 311 and the second part 312 include:

[0135] In the first time phase or preheating phase, the first part 311 is raised from room temperature to a predetermined temperature; in this first time phase, since the second part 312 can only generate heat by receiving heat transferred from the first part 311, the temperature of the first part 311 is greater than the temperature of the second part 312.

[0136] In the second time phase or heating phase, the first part 311 is kept within a predetermined temperature range for heating; in this second time phase, since the heating element 31 has the aforementioned improved thermal conductivity, the second part 312 receives the conducted heat more quickly and thus its temperature is substantially the same as or close to that of the first part 311.

[0137] or Figures 4 to 6 A schematic diagram of a heater 30a according to yet another embodiment is shown; in this embodiment, the heater 30a includes:

[0138] A tubular heating element 31a extending between a first end 310a and a second end 320a;

[0139] The first electrode 321a and the second electrode 322a are formed or combined on the outer surface of the heating body 31a and are arranged at intervals along the longitudinal direction of the heating body 31a.

[0140] exist Figures 4 to 6As shown, the heating element 31a includes a first portion 311a and a second portion 312a arranged continuously along the longitudinal direction. A first electrode 321a and a second electrode 322a are coupled to the first portion 311a. Figure 6 As shown, during use, the first electrode 321a and the second electrode 322a are electrically connected to the circuit board 20 via conductive leads or other means. The circuit board 20 then guides a current i1a through the first electrode 321a and the second electrode 322a onto the first portion 311a of the heating element 31a. The current i1a is essentially along the longitudinal direction of the heating element 31a. In operation, the first portion 311a heats up through resistive Joule heating; the second portion 312a primarily heats up by receiving the heat transferred from the first portion 311a. The heat transfer is as follows... Figure 6 As indicated by the middle arrow R1.

[0141] In one embodiment, the first electrode 321a and / or the second electrode 322a are arranged to extend circumferentially along the heating element 31a. In another embodiment, the first electrode 321a and / or the second electrode 322a are not closed circumferentially along the heating element 31a. Alternatively, at least one of the first electrode 321a and the second electrode 322a is not closed circumferentially.

[0142] exist Figures 4 to 6 As shown, the first electrode 321a and / or the second electrode 322a are arcuate shapes extending circumferentially along the heating body 31a. At least a portion of the first electrode 321a and at least a portion of the second electrode 322a are opposite each other in the longitudinal direction of the heating body 31a; or, in the longitudinal direction of the heating body 31a, the first electrode 321a and the second electrode 322a are not completely staggered. In some alternative embodiments, the first electrode 321a and the second electrode 322a have the same arcuate extension along the circumferential direction of the heating body 31a; or in still other alternative embodiments, the first electrode 321a and the second electrode 322a have different arcuate extensions along the circumferential direction of the heating body 31a. For example, the arcuate extension of the first electrode 321a along the circumferential direction of the heating body 31a is smaller than the arcuate extension of the second electrode 322a along the circumferential direction of the heating body 31a. Figures 4 to 6 As shown, the arc of the first electrode 321a and / or the second electrode 322a extending circumferentially along the heating body 31a is between π and 2π.

[0143] exist Figures 4 to 6As shown, the first electrode 321a defines a first notch 3211a; the second electrode 322a defines a second notch 3221a. In one embodiment, the first notch 3211a and the second notch 3221a are completely offset in the longitudinal direction of the heating element 31a. Alternatively, in some other embodiments, the first notch 3211a and the second notch 3221a are partially offset in the longitudinal direction of the heating element 31a. Or, in some other optional embodiments, the first notch 3211a and the second notch 3221a are arranged opposite to each other in the radial direction of the heating element 31a.

[0144] exist Figures 4 to 6 As shown, the circumferential extension arc d41 of the first notch 3211a in the heating body 31a and the circumferential extension arc d42 of the second notch 3221a in the heating body 31a are the same. Alternatively, in some embodiments, the circumferential extension arc d41 of the first notch 3211a in the heating body 31a and the circumferential extension arc d42 of the second notch 3221a in the heating body 31a are different; for example, in an optional embodiment, the extension arc d41 of the first notch 3211a is greater than the extension arc d42 of the second notch 3221a. In some embodiments, the extension arc d41 of the first notch 3211a and / or the extension arc d42 of the second notch 3221a are approximately between 0.1π and 0.8π. For example, in... Figures 4 to 6 As shown, the extension arc d41 of the first notch 3211a and / or the extension arc d42 of the second notch 3221a are approximately 0.3π to 0.5π.

[0145] exist Figures 4 to 6 As shown, in the longitudinal direction of the heating element 31a, the first electrode 321a has at least one or more first segments longitudinally opposite to the second electrode 322a. Correspondingly, the second electrode 322a has at least one or more second segments longitudinally opposite to the first electrode 321a. Specifically in... Figures 4 to 6 As shown, the first electrode 321a has two first segments longitudinally opposite to the second electrode 322a, namely first segment 3212a and first segment 3213a; the second electrode 322a has two second segments longitudinally opposite to the first electrode 321a, namely second segment 3222a and second segment 3223a. Specifically, the first segment 3212a and second segment 3222a are longitudinally opposite, and the first segment 3213a and second segment 3223a are longitudinally opposite. Figure 6 As shown, the first segment is spaced out, that is, the first segment 3212a and the first segment 3213a are spaced out; the second segment is spaced out, that is, the second segment 3222a and the second segment 3223a are spaced out.

[0146] exist Figures 4 to 6As shown, the circumferential extension arc of each first segment and / or each second segment is between 0.03π and π; or, the circumferential extension angle of each first segment and / or each second segment is between 5° and 180°. In a preferred embodiment, the circumferential extension arc of each first segment and / or each second segment is between π / 3 and 2π / 3. For example, in some specific embodiments, the circumferential extension angle of the first segment 3212a / first segment 3213a / second segment 3222a / second segment 3223a is 60°, 90°, or 180°.

[0147] exist Figures 4 to 6 As shown, when current is guided onto the heating element 31a through the first electrode 321a and the second electrode 322a, the current i1a on the heating element 31a is mainly generated in the first region between the first segment 3212a and the second segment 3222a, and in the second region between the first segment 3213a and the second segment 3223a. Thus, during operation, resistive Joule heating is mainly generated in the first region between the first segment 3212a and the second segment 3222a, and in the second region between the first segment 3213a and the second segment 3223a; this is advantageous for creating a differential temperature field on the heating element 31a.

[0148] In some embodiments, the length of the first segment 3213a is less than the length of the first segment 3212a; or, the length of the second segment 3222a is less than the length of the second segment 3223a. In this case, the area of ​​the first region is greater than the area of ​​the second region. Alternatively, in still other embodiments, the length of the first segment 3213a is equal to the length of the first segment 3212a; or, the length of the second segment 3222a is equal to the length of the second segment 3223a. In this case, the area of ​​the first region is equal to the area of ​​the second region.

[0149] or Figure 7 A schematic diagram of a heater 30b according to yet another embodiment is shown; in this embodiment, the heater 30b includes:

[0150] A tubular heating element 31b extending between a first end 310b and a second end 320b;

[0151] The first electrode 321b and the second electrode 322b are formed or combined on the heating body 31b and are arranged at intervals along the longitudinal direction of the heating body 31b.

[0152] exist Figure 7In the illustrated embodiment, the first electrode 321b and the second electrode 322b are not closed in the circumferential direction. The first electrode 321b has a first notch 3211b, and the second electrode 322b has a second notch 3221b. The first notch 3211b and the second notch 3221b are at least partially offset in the longitudinal direction. The circumferential extension arc of the first electrode 321b and the second electrode 322b in the heating body 31b is between 0.03π and 2π. More preferably, the circumferential extension arc of the first electrode 321b and the second electrode 322b in the heating body 31b is between π and 1.75π.

[0153] exist Figure 7 In the illustrated embodiment, in the longitudinal direction of the heating element 31b, the first electrode 321b has a first segment 3212b longitudinally opposite to the second electrode 322b. Correspondingly, the second electrode 322b has a second segment 3222b longitudinally opposite to the first electrode 321b. The circumferential extension radian d51 of the first segment 3212b and / or the second segment 3222b is between 0.03π and 1.75π. For example, in some specific embodiments, the circumferential extension angle of the first segment 3212b and / or the second segment 3222b is 60°, 90°, 180°, or 270°.

[0154] exist Figure 7 In the illustrated embodiment, the first segment 3212b is continuous rather than spaced; the second segment 3222b is continuous rather than spaced.

[0155] exist Figure 7 In the illustrated embodiment, the circumferential extension length of the first electrode 321b is less than the circumferential extension length of the second electrode 322b. Alternatively, in some other embodiments, the circumferential extension length of the first electrode 321b is equal to the circumferential extension length of the second electrode 322b.

[0156] or Figure 8 A schematic diagram of a heater 30c according to yet another embodiment is shown; in this embodiment, the heater 30c includes:

[0157] A tubular heating element 31c extends between a first end 310c and a second end 320c;

[0158] A first electrode 321c and a second electrode 322c are formed or attached to a heating element 31c and are arranged at intervals along the longitudinal direction of the heating element 31c. The first electrode 321c and the second electrode 322c can be configured to extend circumferentially along the heating element 31c. The first electrode 321c is not closed in the circumferential direction and has a first notch 3211c; the second electrode 322c is not closed in the circumferential direction and has a second notch 3221c. Figure 8In the illustrated embodiment, the first electrode 321c is close to the first end 310c and has a first distance d61 between it and the first end 310c. The first electrode 321c and the second electrode 322c have a second distance d62 between them. The second electrode 322c is close to the second end 320c and has a third distance d63 between it and the second end 320c.

[0159] exist Figure 8 In the illustrated embodiment, the second spacing d62 is greater than the first spacing d61 and / or the third spacing d63. Alternatively, the second spacing d62 is greater than or equal to 1 / 3 of the longitudinal length of the heating element 31c. This results in a larger area of ​​resistive Joule heating on the heating element 31c during operation.

[0160] It should be noted that the preferred embodiments of this application are given in the specification and accompanying drawings, but are not limited to the embodiments described in this specification. Furthermore, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An aerosol generating device, configured to heat an aerosol generating product to generate an aerosol; characterized in that, include: The chamber has an open opening; During use, the aerosol-generated article can be at least partially received into or removed from the chamber through the opening; A heating element surrounds or defines at least a portion of the chamber and is used to heat the aerosol-generating article; the heating element includes a first end near the opening and a second end away from the first end; A first electrode and a second electrode are arranged at intervals on the heating element along its longitudinal direction; the first electrode and the second electrode extend circumferentially along the heating element, at least a portion of the first electrode is opposite to at least a portion of the second electrode in the longitudinal direction of the heating element, thereby guiding current in the longitudinal direction of the heating element during use; the first electrode is closer to the first end than the second electrode, or the first electrode is located between the first end and the second electrode; the distance between the second electrode and the first end is less than the distance between the second electrode and the second end.

2. The aerosol generating device as described in claim 1, characterized in that, The heating element is prepared by molding and sintering conductive ceramic material. Alternatively, the heating element may be a conductive ceramic body.

3. The aerosol generating device as described in claim 2, characterized in that, The temperature coefficient of resistance of the material of the heating element is between -1500 and -2500 ppm / ℃.

4. The aerosol generating apparatus according to any one of claims 1 to 3, characterized in that, The thermal conductivity of the heating element is greater than 20 W / mk.

5. The aerosol generating apparatus according to any one of claims 1 to 3, characterized in that, The first electrode and / or the second electrode are closed rings.

6. The aerosol generating apparatus according to any one of claims 1 to 3, characterized in that, The first electrode and / or the second electrode are configured to be non-closed in the circumferential direction; The first electrode has a first notch, and / or the second electrode has a second notch.

7. The aerosol generating device as described in claim 6, characterized in that, The first notch and the second notch are staggered in the longitudinal direction of the heating element.

8. The aerosol generating device as described in claim 6, characterized in that, The arc of the first notch and / or the second notch extending circumferentially along the heating element is between 0.1π and 0.8π.

9. The aerosol generating device as described in claim 6, characterized in that, The arc of the first electrode and / or the second electrode extending circumferentially along the heating body is between 0.03π and 2π.

10. The aerosol generating device as described in claim 6, characterized in that, The first electrode and the second electrode extend in the same arc along the circumference of the heating body; Alternatively, the first electrode and the second electrode may extend at different circumferential arcs along the heating element.

11. The aerosol generating device as described in claim 6, characterized in that, The first electrode has at least one first segment, and the second electrode has at least one second segment; at least one first segment and at least one second segment are opposite each other in the longitudinal direction of the heating element.

12. The aerosol generating device as described in claim 11, characterized in that, The first section and / or the second section extend in circumferential arc of the heating body by 0.03π to 1.75π.

13. The aerosol generating device as described in claim 11, characterized in that, The first electrode has two spaced first segments, and the second electrode has two spaced second segments.

14. The aerosol generating apparatus according to any one of claims 1 to 3, characterized in that, Also includes: A conductive transition adhesive layer is formed or disposed between the first electrode and / or the second electrode and the heating element to provide adhesion between the first electrode and / or the second electrode and the heating element.

15. The aerosol generating device as described in claim 14, characterized in that, The thickness of the transition adhesive layer is between 0.01 mm and 1.0 mm.

16. The aerosol generating device as described in claim 14, characterized in that, The coefficient of thermal expansion of the transition bonding layer is less than that of the first electrode and / or the second electrode.

17. The aerosol generating apparatus according to any one of claims 1 to 3, characterized in that, The first electrode and the first end have a first distance, the first electrode and the second electrode have a second distance, and the second electrode and the second end have a third distance; the second distance is greater than the first distance and the second distance is less than the third distance.

18. The aerosol generating apparatus according to any one of claims 1 to 3, characterized in that, The heating element includes: A first portion, adjacent to or defining the first end; a second portion, adjacent to or defining the second end; the first electrode and / or the second electrode are disposed on the first portion and away from the second portion; When current is guided through the first electrode and the second electrode on the heating element, the first part can generate heat through resistive Joule heating, and the second part generates heat by receiving the heat transferred from the first part.

19. The aerosol generating device as described in claim 18, characterized in that, The heating element has no electrodes for guiding current in the second part.

20. An aerosol generating apparatus, configured to heat an aerosol generating product to generate an aerosol; characterized in that, include: The chamber has an open opening; During use, the aerosol-generated article can be at least partially received into or removed from the chamber through the opening; A heating element surrounds or defines at least a portion of the chamber and is used to heat an aerosol-generating article; a first electrode and a second electrode are arranged on the heating element at longitudinal intervals; the first electrode and the second electrode are arranged to extend circumferentially along the heating element, with at least a portion of the first electrode facing at least a portion of the second electrode in the longitudinal direction of the heating element, thereby guiding current in the longitudinal direction of the heating element by the first electrode and the second electrode during use; The first electrode and / or the second electrode are configured to be non-closed in the circumferential direction.

21. An aerosol generating device, configured to heat an aerosol generating product to generate an aerosol; characterized in that, include: A chamber having an opening; in use, the aerosol-generating article can be at least partially received into or removed from the chamber through the opening; A heating element made of conductive ceramic material surrounds or defines at least a portion of the chamber and is used to heat an aerosol-generating article; the heating element includes a first portion and a second portion arranged sequentially in a longitudinal direction; The first electrode and the second electrode are arranged longitudinally at intervals on the first portion and avoid the second portion; The first electrode and the second electrode are arranged to extend circumferentially along the heating body, thereby guiding current on the first portion by the first electrode and the second electrode in use, so that the first portion is heated by resistance Joule heating to generate an article from an aerosol. The second part generates heat by receiving heat transferred from the first part, thereby heating the aerosol to produce the product.

22. An aerosol generating device, configured to heat an aerosol generating product to generate an aerosol; characterized in that, include: The chamber has an open opening; During use, the aerosol-generated article can be at least partially received into or removed from the chamber through the opening; A heating element surrounds or defines at least a portion of the chamber and is used to heat the aerosol-generated article; The first electrode and the second electrode are arranged at intervals on the heating element for guiding current on the heating element; A conductive transition adhesive layer is formed or disposed between the first electrode and / or the second electrode and the heating element to provide adhesion between the first electrode and / or the second electrode and the heating element.

23. A heater for an aerosol generating device, characterized in that, include: The first and second ends, which are opposite each other along the longitudinal direction; A tubular heating element extends from the first end to the second end; A first electrode and a second electrode are arranged at intervals on the heating element along its longitudinal direction; the first electrode and the second electrode extend circumferentially along the heating element, at least a portion of the first electrode is opposite to at least a portion of the second electrode in the longitudinal direction of the heating element, thereby guiding current in the longitudinal direction of the heating element during use; the first electrode is closer to the first end than the second electrode, or the first electrode is located between the first end and the second electrode; the distance between the second electrode and the first end is less than the distance between the second electrode and the second end.

24. A heater for an aerosol generating device, characterized in that, include: Tubular heating element; The first electrode and the second electrode are arranged at intervals on the heating body along the longitudinal direction of the heating body; The first electrode and the second electrode are arranged to extend circumferentially along the heating body, with at least a portion of the first electrode facing at least a portion of the second electrode in the longitudinal direction of the heating body, thereby guiding current in the longitudinal direction of the heating body by the first electrode and the second electrode during use; The first electrode and / or the second electrode are configured to be non-closed in the circumferential direction.

25. A heater for an aerosol generating device, characterized in that, include: A tubular heating element made of conductive ceramic material; The heating element comprises a first part and a second part arranged sequentially along the longitudinal direction; The first electrode and the second electrode are arranged longitudinally at intervals on the first portion and avoid the second portion; The first electrode and the second electrode are arranged to extend circumferentially along the heating body, thereby guiding current on the first portion by the first electrode and the second electrode in use, so that the first portion is heated by resistance Joule heating to generate an article from an aerosol. The second part generates heat by receiving heat transferred from the first part, thereby heating the aerosol to produce the product.

26. A heater for an aerosol generating device, characterized in that, include: Tubular heating element; The first electrode and the second electrode are arranged at intervals on the heating element for guiding current on the heating element; A conductive transition adhesive layer is formed or disposed between the first electrode and / or the second electrode and the heating element to provide adhesion between the first electrode and / or the second electrode and the heating element.

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