Aerosol generating device and heater for aerosol generating device

Abstract

The utility model provides a mist generating device and a heater for the mist generating device. Wherein the aerial fog generating device comprises a heater; the heater comprises a first end and a second end which are opposite in the longitudinal direction; the heating element is located between the first end and the second end, a first interval area is defined by the heating element and the first end, and a second interval area is defined by the heating element and the second end; the first interdigital electrode comprises at least two first interdigital parts, and the first interdigital parts at least partially extend from the first interval area to the second interval area on the heating element; the second interdigital electrode comprises at least two second interdigital parts, and the second interdigital parts at least partially extend on the heating element from the second interval area to the first interval area; the first and second interdigital portions are alternately arranged in a circumferential direction of the heater. According to the aerial fog generating device, the heating element is separated by the interdigital electrodes to form a plurality of heating areas which are connected in parallel, and the total resistance value is reduced exponentially, so that the aerial fog generating device has higher power and heating efficiency.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of heat-not-burn aerosol generation, and in particular to an aerosol generating device and a heater for an aerosol generating device. Background Art

[0002] During the use of tobacco products (such as cigarettes, cigars, etc.), tobacco is burned to produce tobacco smoke. People have tried to replace these tobacco-burning products by manufacturing products that release compounds without burning.

[0003] An example of such a product is a heating device that releases compounds by heating rather than burning materials. For example, the material can be an aerosol-generating article of tobacco or other non-tobacco products, which may or may not contain nicotine. In known heating devices, in order to heat the aerosol-generating article to a temperature capable of releasing volatile components that can form an aerosol, an aerosol-generating article is usually surrounded by a tubular substrate, and a resistive or infrared heating coating is formed or arranged outside the tubular substrate, and the aerosol-generating article inside the tubular substrate is heated by resistive Joule heating or infrared radiation to generate an aerosol. Summary of the Utility Model

[0004] An embodiment of the present application provides an aerosol generating device configured to heat an aerosol-generating article to generate an aerosol; the aerosol generating device includes:

[0005] A heater for heating the aerosol-generating article; the heater includes:

[0006] A first end and a second end facing away from each other in the longitudinal direction;

[0007] A heating element located between the first end and the second end, and defining a first spaced area between the heating element and the first end, and a second spaced area between the heating element and the second end;

[0008] A first interdigital electrode and a second interdigital electrode for guiding current on the heating element; the first interdigital electrode includes at least two first interdigital portions, and the first interdigital portions are arranged to at least partially extend on the heating element from the first spaced area to the second spaced area; the second interdigital electrode includes at least two second interdigital portions, and the second interdigital portions are arranged to at least partially extend on the heating element from the second spaced area to the first spaced area; the first interdigital portions and the second interdigital portions are alternately arranged in the circumferential direction of the heater.

[0009] In some embodiments, the aerosol generating device includes:

[0010] A chamber for receiving the aerosol-generating article;

[0011] The heater further comprises:

[0012] A tubular substrate, arranged to extend between the first end and the second end and at least partially surround or define the chamber; the heating element is formed on or integrated with the substrate.

[0013] In some embodiments, the first finger portion and / or the second finger portion are arranged to extend longitudinally along the heater and the extension length spans the heating element.

[0014] In some embodiments, the first finger electrode further comprises a first base located in the first spacer region; the first finger portion is arranged to extend from the first base to the second spacer region;

[0015] And / or, the second finger electrode further comprises a second base located in the second spacer region; the second finger portion is arranged to extend from the second base to the first spacer region;

[0016] And / or, the first base and the second base are spaced from the heating element.

[0017] In some embodiments, each of the at least two first finger portions at least partially extends between two adjacent second finger portions; and each of the at least two second finger portions at least partially extends between two adjacent first finger portions.

[0018] In some embodiments, the heating element is circumferentially separated or defines a plurality of heating regions located between adjacent first finger portions and second finger portions; when current is conducted through the first finger electrode and the second finger electrode on the heating element, the plurality of heating regions operate simultaneously in parallel.

[0019] Another embodiment of the present application further provides an aerosol generating device configured to heat an aerosol generating article to generate an aerosol; comprising:

[0020] A chamber for receiving an aerosol generating article;

[0021] A heater for heating the aerosol generating article; the heater comprises:

[0022] A first end and a second end facing away from each other in the longitudinal direction;

[0023] A first heating element and a second heating element arranged at longitudinal intervals and at least partially surrounding the chamber; the first heating element is closer to the first end than the second heating element;

[0024] A first interdigital electrode, a second interdigital electrode, and a third interdigital electrode for guiding current on the first heating element and the second heating element; the first interdigital electrode includes a first base located between the first heating element and the first end, and at least two first interdigital fingers extending from the first base to the first heating element; the second interdigital electrode includes a second base located between the second heating element and the second end, and at least two second interdigital fingers extending from the second base to the second heating element; the third interdigital electrode includes a third base located between the first heating element and the second heating element, at least two third interdigital fingers extending from the third base to the first heating element, and at least two fourth interdigital fingers extending from the third base to the second heating element;

[0025] Along the circumferential direction of the heater, the first interdigital fingers and the third interdigital fingers are alternately arranged, and the second interdigital fingers and the fourth interdigital fingers are alternately arranged.

[0026] In some embodiments, there is a second interdigital finger longitudinally aligned with each of the first interdigital fingers;

[0027] And / or, the third interdigital fingers and the fourth interdigital fingers are longitudinally aligned on the heater

[0028] And / or, the width of the first interdigital fingers is different from the width of the second interdigital fingers;

[0029] And / or, the width of the third interdigital fingers is different from the width of the fourth interdigital fingers.

[0030] In some embodiments, the second base is non-closed in the circumferential direction and defines a notch;

[0031] At least one of the fourth interdigital fingers extends into or through the notch.

[0032] Another embodiment of the present application further provides a heater for an aerosol generating device; including:

[0033] A tubular substrate having a first end and a second end facing away from each other in the longitudinal direction;

[0034] A heating element is coupled to the substrate and is located between the first end and the second end; a first spacer region is defined between the heating element and the first end, and a second spacer region is defined between the heating element and the second end;

[0035] A first interdigital electrode and a second interdigital electrode for guiding current on the heating element; the first interdigital electrode includes at least two first interdigital portions, and the first interdigital portions are arranged to extend at least partially on the heating element from the first spacing region to the second spacing region; the second interdigital electrode includes at least two second interdigital portions, and the second interdigital portions are arranged to extend at least partially on the heating element from the second spacing region to the first spacing region; the first interdigital portions and the second interdigital portions are alternately arranged in the circumferential direction of the heater.

[0036] Another embodiment of the present application further provides a heater for an aerosol generating device; comprising:

[0037] A tubular substrate having a first end and a second end facing away from each other in the longitudinal direction;

[0038] A first heating element and a second heating element, combined on the substrate and arranged at intervals along the longitudinal direction of the substrate; the first heating element is closer to the first end than the second heating element;

[0039] A first interdigital electrode, a second interdigital electrode and a third interdigital electrode for guiding current on the first heating element and the second heating element; the first interdigital electrode includes a first base located between the first heating element and the first end, and at least two first interdigital portions extending from the first base to the first heating element; the second interdigital electrode includes a second base located between the second heating element and the second end, and at least two second interdigital portions extending from the second base to the second heating element; the third interdigital electrode includes a third base located between the first heating element and the second heating element, at least two third interdigital portions extending from the third base to the first heating element, and at least two fourth interdigital portions extending from the third base to the second heating element;

[0040] In the circumferential direction of the substrate, the first interdigital portions and the third interdigital portions are alternately arranged, and the second interdigital portions and the fourth interdigital portions are alternately arranged.

[0041] In the above aerosol generating device, the heating element is separated by the interdigital electrode to form a plurality of parallel heating regions, and the total resistance value is reduced by several times, so as to have greater power and heating efficiency. Description of the Drawings

[0042] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, the drawings in the drawings do not constitute a proportional limitation.

[0043] Figure 1 is a schematic view of an aerosol generating device provided by an embodiment;

[0044] Figure 2 is a schematic structural view of a heater of an embodiment from a perspective;

[0045] Figure 3 is Figure 2 an exploded schematic view of the heater in from a perspective;

[0046] Figure 4 is Figure 2 a schematic view of the working current of the heater in after circumferential expansion;

[0047] Figure 5 is a schematic structural view of a heater of another embodiment from a perspective;

[0048] Figure 6 is Figure 5 a schematic structural view of the heater in from another perspective;

[0049] Figure 7 is Figure 5 an exploded schematic view of the heater in from a perspective;

[0050] Figure 8 is Figure 5 a schematic view of the working current after circumferential expansion in an electrical connection state of the heater in. Detailed implementation manners

[0051] For ease of understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific implementation manners.

[0052] An embodiment of the present application provides an aerosol generating device 100 that heats rather than burns an aerosol generating article 1000 such as a cigarette, so as to volatilize or release at least one component of the aerosol generating article 1000 to form an aerosol for inhalation, such as Figure 1 shown.

[0053] In an alternative embodiment, the aerosol generating article 1000 preferably uses a tobacco-containing material that releases volatile compounds from a matrix when heated; or it can also be a non-tobacco material that is suitable for electrically heated smoking after heating. The aerosol generating article 1000 preferably uses a solid matrix, which may include one or more of powder, granule, fragment, strip, or sheet of vanilla leaf, tobacco leaf, homogenized tobacco, expanded tobacco; or the solid matrix may contain additional tobacco or non-tobacco volatile flavor compounds to be released when the matrix is heated.

[0054] According to Figure 1As shown, when the aerosol-generating article 1000 is received in the aerosol-generating device 100, part of it, such as the filter tip, is exposed outside the aerosol-generating device 100, which is beneficial for the user to suck.

[0055] The structure of the aerosol-generating device 100 according to an embodiment of the present application can be referred to Figure 1 As shown, the overall shape of the device is generally constructed in a longitudinally elongated shape. The aerosol-generating device 100 includes:

[0056] A chamber having an opening 40; in use, the aerosol-generating article 1000 can be removably received in the chamber through the opening 40 of the chamber;

[0057] A heater 30, at least partially arranged around or defining 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 it, so that the aerosol-generating article 1000 releases a variety of volatile compounds, and these volatile compounds are formed only by heat treatment;

[0058] 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;

[0059] A circuit board 20, such as a PCB board or an FPC board, is provided with a circuit for guiding current between the battery cell 10 and the heater 30.

[0060] In Figure 1 In the illustrated embodiment, the heater 30 is arranged in a tubular shape, and at least part of the tubular hollow 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 the outer periphery of the aerosol-generating article 1000. And, when the aerosol-generating article 1000 is received in the chamber, it is at least partially received and held within the heater 30.

[0061] Figures 2 to 4 A schematic diagram of a heater 30 according to an embodiment is shown,

[0062] A tubular substrate 31; in use, at least part of the inner hollow of the substrate 31 defines a chamber for receiving and holding the aerosol-generating article 1000; and,

[0063] A heating element 32 formed or arranged on the substrate 31; in some embodiments, the heating element 32 is formed on the outer surface of the substrate 31 by means of deposition, spraying, printing or wrapping, etc. Or in some other embodiments, the heating element 32 is formed on the inner surface of the substrate 31.

[0064] In some embodiments, the circumferential length or perimeter of the substrate 31 is greater than the length of the substrate 31 in the longitudinal direction. In some embodiments, the longitudinal length of the substrate 31 does not exceed 15 mm or is less than 15 mm. In some embodiments, the substrate 31 may have a longitudinal length of approximately 10 millimeters to 15 millimeters and an inner diameter dimension of approximately 5.8 mm to 10 mm. In some specific embodiments, the substrate 31 may have a longitudinal length of 12 mm; the substrate 31 may have an inner diameter of 7.6 mm.

[0065] In some embodiments, the heating element 32 is closed in the circumferential direction of the heater 30; the heating element 32 is a closed ring. In some embodiments, the length of the heating element 32 is 8 to 12 mm.

[0066] In some embodiments, the heating element 32 is a coating or thin layer formed on the substrate 31 by deposition, spraying, printing, etc. Or in some other embodiments, the heating element 32 is a thin film wrapped or bonded to the substrate 31. Or in some other alternative embodiments, the resistive heating element 32 may also be a resistive heating film wound or bonded to the substrate 31, etc.

[0067] In some embodiments, the thickness of the heating element 32 in the form of a resistive coating can preferably be controlled to be 10 μm to 300 μm; and the heating element 32 can be formed on the surface of the tubular substrate 31 by being sprayed on the outer surface of the tubular substrate 31 by atmospheric plasma spraying and then cured.

[0068] In some embodiments, the heating element 32 is a resistive heating layer; by guiding an electric current through the heating element 32, the heating element 32 can generate heat through resistive Joule heating, thereby heating the aerosol generating article 1000. And, in some embodiments, the heating element 32 used for heating by generating resistive Joule heat may include graphite or resistive metals or alloys; wherein, the metals or alloys are, for example, nickel-chromium alloys, nickel-iron alloys, platinum, tungsten, silver, aluminum, titanium, molybdenum, manganese or alloys containing them, etc.

[0069] When applied to the heating element 32 that is heated by resistance heating as described above, the material of the base 31 is a material with good thermal conductivity, such as ceramics, glass, metal or alloy with surface insulation such as anodized aluminum, aluminum alloy, copper alloy, stainless steel, etc. And in some embodiments, the thermal conductivity of the base 31 is at least 10 W / m·K, preferably at least 100 W / m·K; or in some embodiments, the thermal conductivity of the base 31 is greater than 200 W / m·K or higher. In some embodiments, the base 31 includes metals with high thermal conductivity coefficients such as aluminum, copper, titanium, or alloys containing at least one of them. In some embodiments, the wall thickness of the base 31 is between 0.1 and 0.5 mm; more specifically, for example, the wall thickness of the base 31 is between 0.15 and 0.2 mm.

[0070] In still other embodiments, the heating element 32 is an infrared emission layer, such as an electro-induced infrared emission layer; by applying a DC voltage to the heating element 32, the heating element 32 can radiate infrared rays under voltage drive, thereby heating the aerosol generating article 1000. When applied to the heating element 32 that is heated by radiating infrared rays as described above, the material of the base 31 is a material that can transmit infrared rays, such as quartz, glass, ceramics, etc. In some embodiments, the heating element 32 for radiating infrared rays may be a coating prepared from ceramic-based materials such as zirconium, or Fe-Mn-Cu-based, tungsten-based, or transition metal and their oxide materials. For example, in some embodiments, the heating element 32 for radiating infrared rays is composed of oxides of at least one metal element such as Mg, Al, Ti, Zr, Mn, Fe, Co, Ni, Cu, Cr, Zn, etc. These metal oxides can radiate infrared rays with heating effect when heated to an appropriate heating temperature.

[0071] According to Figures 2 to 4 the embodiment shown, the base 31 includes:

[0072] a first end 311 and a second end 312 that are opposite to each other in the longitudinal direction; in the embodiment, the first end 311 and the second end 312 in the length direction of the base 31 respectively define both ends of the heater 30; and at least the inner hollow of the base 31 defines a chamber for receiving the aerosol generating article 1000; wherein, the first end 311 is closer to or oriented towards the opening 40.

[0073] The heating element 32 is arranged to extend between the first end 311 and the second end 312. And, on the outer surface of the base 31, there is also defined:

[0074] a first spacer region 313, located between the first end 311 and the heating element 32;

[0075] a second spacer region 314, located between the heating element 32 and the second end 312.

[0076] In some embodiments, along the longitudinal direction of the base body 31, the first spaced-apart region 313 and / or the second spaced-apart region 314 have substantially the same dimensions. For example, in some alternative embodiments, the first spaced-apart region 313 and / or the second spaced-apart region 314 have a length of approximately 0.5 to 2 mm; more specifically, for example, the first spaced-apart region 313 and / or the second spaced-apart region 314 have a length of approximately 1.0 mm. In assembly, the aerosol generating device 100 is coupled to the first spaced-apart region 313 near the first end 311 and the second spaced-apart region 314 near the second end 312 through a clamping member or the like, thereby holding and fixing the heater 30.

[0077] According to Figures 2 to 4 As shown, the heater 30 further includes:

[0078] A first interdigital electrode 33 and a second interdigital electrode 34 for guiding current on the heating element 32. In some embodiments, the first interdigital electrode 33 and the second interdigital electrode 34 are coatings formed of an electrode material with low resistivity. In some alternative embodiments, the materials of the first interdigital electrode 33 and the second interdigital electrode 34 are gold, silver, copper with low resistivity or alloys thereof. Or in still some other variant embodiments, the first interdigital electrode 33 and the second interdigital electrode 34 can also be replaced with a thinner sheet-like structure, which is formed outside the base body 31 by welding or being closely attached.

[0079] In use, the first interdigital electrode 33 and the second interdigital electrode 34 are respectively connected to the circuit board 20 by welding conductive leads or the like, so that the circuit board 20 operably connects one of the first interdigital electrode 33 and the second interdigital electrode 34 to the positive electrode of the battery cell 10 and the other to the negative electrode of the battery cell 10, and then supplies power to the heating element 32 through the first interdigital electrode 33 and the second interdigital electrode 34.

[0080] In a specific configuration, the first interdigital electrode 33 includes:

[0081] A first base portion 331, which is configured to be an annular shape around the base body 31; the first base portion 331 is combined within the first spaced-apart region 313, or the first base portion 331 is located between the heating element 32 and the first end 311; the first base portion 331 is spaced from the heating element 32;

[0082] At least two or more first finger portions, such as first finger portion 332 and first finger portion 333, are arranged along the longitudinal direction of the heater 30; at least two or more first finger portions are arranged at intervals in the circumferential direction of the heater 30; at least two or more first finger portions extend from the first base portion 331 to the heating element 32 and are combined with the heating element 32; specifically, the extension length of the first finger portion crosses the heating element 32 and terminates at the second spacing region 314.

[0083] In a specific configuration, the second finger electrode 34 includes:

[0084] A second base portion 341, which is configured to be in an annular shape around the base body 31; the second base portion 341 is combined within the second spacing region 314, or the second base portion 341 is located between the heating element 32 and the second end 312; the second base portion 341 is spaced from the heating element 32;

[0085] At least two or more second finger portions, such as second finger portion 342 and second finger portion 343, are arranged along the longitudinal direction of the heater 30; at least two or more second finger portions are arranged at intervals in the circumferential direction of the heater 30; at least two or more second finger portions extend from the second base portion 341 to the heating element 32 and are combined with the heating element 32; specifically, the extension length of the second finger portion crosses the heating element 32 and terminates at the first spacing region 313.

[0086] In an embodiment, at least two or more first finger portions and at least two or more second finger portions are arranged alternately in the circumferential direction of the heater 30. And specifically, according to Figure 4 In the illustrated embodiment, each of the plurality of first finger portions at least partially extends between two adjacent second finger portions; and each of the plurality of second finger portions at least partially extends between two adjacent first finger portions. In an embodiment, by alternately arranging the first finger portions and the second finger portions, the heating element 32 is separated into a plurality of heating regions located between adjacent first finger portions and second finger portions in the circumferential direction; each heating region conducts current in the circumferential direction by the adjacent first finger portion and second finger portion.

[0087] Specifically Figure 4 A schematic diagram showing the conduction of current on the heating element 32 by the first finger portion 332 and the first finger portion 333 during use is shown; according to Figure 4As shown, the heating element 32 is circumferentially divided into heating regions 321, 322, 323, and 324 arranged in sequence; among them, the heating region 321 is formed or defined between the first interdigital portion 332 and the second interdigital portion 342, the heating region 322 is formed or defined between the first interdigital portion 332 and the second interdigital portion 343, the heating region 323 is formed or defined between the first interdigital portion 333 and the second interdigital portion 343, and the heating region 324 is formed or defined between the first interdigital portion 333 and the second interdigital portion 342. Each heating region is guided by the first interdigital portion and the second interdigital portion that separate or define them to conduct current circumferentially, for example Figure 4 the current i11 on the heating region 321, the current i12 on the heating region 322, the current i13 on the heating region 323, and the current i14 on the heating region 324 in Figure 4 .

[0088] In an embodiment, the heating element 32 is separated by the first interdigital electrode 33 and the second interdigital electrode 34 to form multiple heating regions that work simultaneously in parallel. The total resistance value of the heating element 32 during operation is equivalent to 1 / 4 of the original resistance value; during operation, the total resistance value of the heating element 32 is reduced to an ultra-low resistance value, controlled at about 0.5 Ω, so that it has greater power and heating efficiency during operation.

[0089] In some embodiments, the width dimensions of the first interdigital portion of the first interdigital electrode 33 and the second interdigital portion of the second interdigital electrode 34 are approximately 0.5 - 3 mm. In some embodiments, the resistance value of the heating element 32 during operation can also be changed or adjusted by increasing or decreasing the width dimensions of the first interdigital portion of the first interdigital electrode 33 and the second interdigital portion of the second interdigital electrode 34.

[0090] Figures 5 to 8 The schematic diagram of the heater 30a in another embodiment is shown; in this embodiment, the heater 30a includes:

[0091] a tubular substrate 31a that at least partially surrounds or defines a chamber; having a first end 311a and a second end 312a that face away from each other longitudinally; the circumferential length of the substrate 31a is greater than the longitudinal length;

[0092] a first heating element 32a and a second heating element 36a that are formed or arranged on the substrate 31a at intervals; the first heating element 32a and the second heating element 36a are configured to be in an annular shape, and the first heating element 32a and the second heating element 36a are closed in the circumferential direction; the first heating element 32a and the second heating element 36a are formed or bonded to the outer surface of the substrate 31a; the first heating element 32a is closer to the first end 311a than the second heating element 36a, and the second heating element 36a is closer to the second end 312a than the first heating element 36a.

[0093] In this embodiment, it is advantageous that the first heating element 32a and the second heating element 36a can heat different sections of the aerosol-generating article 1000 respectively, so as to provide segmented heating of the aerosol-generating article 1000.

[0094] In some embodiments, the first heating element 32a and the second heating element 36a are resistive heating elements or infrared heating elements, such as coatings or thin films formed by spraying, depositing, printing, or wrapping on the outer surface of the substrate 31a.

[0095] In Figures 5 to 8 In the illustrated embodiment, on the outer surface of the substrate 31a, there are defined:

[0096] A first spacer region 313a, formed or defined between the first heating element 32a and the first end 311a;

[0097] A second spacer region 314a, formed or defined between the second heating element 36a and the second end 312a;

[0098] A third spacer region 315a, formed or defined between the first heating element 32a and the second heating element 36a.

[0099] In Figures 5 to 8 In the illustrated embodiment, the heater 30a further includes:

[0100] A first interdigital electrode 33a, a second interdigital electrode 34a, and a third interdigital electrode 35a, for guiding current on the first heating element 32a and the second heating element 36a.

[0101] In a specific arrangement, the first interdigital electrode 33a includes:

[0102] A first base 331a, which is substantially annular or arranged around at least a part of the substrate 31a; the first base 331a is arranged in the first spacer region 313a; the first base 331a is spaced from the first heating element 32a;

[0103] At least two or more first finger portions, such as a first finger portion 332a, a first finger portion 333a, and a first finger portion 334a, are arranged along the longitudinal direction of the heater 30a; at least two or more first finger portions are arranged at intervals in the circumferential direction of the heater 30a; at least two or more first finger portions extend from the first base 331a to the first heating element 32a and are combined with the first heating element 32a; specifically, the extending length of the first finger portion spans the first heating element 32a and terminates in the third spacer region 315a. At least two or more first finger portions avoid the second heating element 36a.

[0104] In a specific arrangement, the second interdigital electrode 34a includes:

[0105] A second base portion 341a, which is substantially annular or arranged around at least a part of the base body 31a; the second base portion 341a is arranged in the second spacing region 314a; the second base portion 341a is spaced from the second heating element 36a;

[0106] At least two or more second interdigital portions, such as the second interdigital portion 342a, the second interdigital portion 343a, and the second interdigital portion 344a, are arranged to extend along the longitudinal direction of the heater 30a; at least two or more second interdigital portions are arranged at intervals in the circumferential direction of the heater 30a; at least two or more second interdigital portions extend from the second base portion 341a to the second heating element 36a and are combined with the second heating element 36a; specifically, the extension length of the second interdigital portion crosses the second heating element 36a and terminates in the third spacing region 315a. At least two or more second interdigital portions avoid the first heating element 32a.

[0107] In a specific arrangement, the third interdigital electrode 35a includes:

[0108] A third base portion 351a, which is substantially annular or arranged around at least a part of the base body 31a; the third base portion 351a is arranged in the third spacing region 315a; the third base portion 351a is spaced from the first heating element 32a and the second heating element 36a;

[0109] At least two or more third interdigital portions, such as the second interdigital portion 352a, the second interdigital portion 353a, and the third interdigital portion 354a, are arranged to extend along the longitudinal direction of the heater 30a; at least two or more second interdigital portions are arranged at intervals in the circumferential direction of the heater 30a; at least two or more second interdigital portions extend from the third base portion 351a to the first heating element 32a and are combined with the first heating element 32a; specifically, the extension length of the third interdigital portion crosses the first heating element 32a and terminates in the first spacing region 313a;

[0110] At least two or more fourth interdigital portions, such as the fourth interdigital portion 355a, the fourth interdigital portion 356a, and the fourth interdigital portion 357a, are arranged to extend along the longitudinal direction of the heater 30a; at least two or more fourth interdigital portions are arranged at intervals in the circumferential direction of the heater 30a; at least two or more fourth interdigital portions extend from the third base portion 351a to the second heating element 36a and are combined with the second heating element 36a; specifically, the extension length of the fourth interdigital portion crosses the second heating element 36a and terminates in the second spacing region 314a.

[0111] In an embodiment, the third finger portions of the third interdigital electrode 35a and the first finger portions of the first interdigital electrode 33a are alternately arranged in the circumferential direction of the heater 30a. In the embodiment, by alternately arranging the first finger portions and the third finger portions, the first heating element 32a is circumferentially divided into a plurality of heating regions located between adjacent first finger portions and third finger portions; each heating region is guided by the adjacent first finger portions and third finger portions to conduct current in the circumferential direction.

[0112] In an embodiment, the fourth finger portions of the third interdigital electrode 35a and the second finger portions of the second interdigital electrode 34a are alternately arranged in the circumferential direction of the heater 30a. In the embodiment, by alternately arranging the second finger portions and the fourth finger portions, the second heating element 36a is circumferentially divided into a plurality of heating regions located between adjacent second finger portions and fourth finger portions; each heating region is guided by the adjacent second finger portions and fourth finger portions to conduct current in the circumferential direction.

[0113] In an embodiment, each of the plurality of first finger portions of the first interdigital electrode 33a is longitudinally aligned with each of the plurality of second finger portions of the second interdigital electrode 34a in the heater 30a. Also, each of the plurality of third finger portions of the third interdigital electrode 35a is longitudinally aligned with each of the plurality of fourth finger portions in the heater 30a.

[0114] In an embodiment, a first electrical connection element 371a is arranged on the first interdigital electrode 33a; the first electrical connection element 371a is combined with the first base portion 331a and / or the first finger portions of the first interdigital electrode 33a by abutting or contacting or welding, etc., and then is electrically connected to the first interdigital electrode 33a; the first electrical connection element 371a is further connected to the circuit board 20 by welding a conductive lead 381a for connecting the first interdigital electrode 33a to the circuit. Similarly, a second electrical connection element 372a is arranged on the second interdigital electrode 34a, and the second electrical connection element 372a is further connected to the circuit board 20 by welding a conductive lead 382a for connecting the second interdigital electrode 34a to the circuit. Similarly, a third electrical connection element 373a is arranged on the third interdigital electrode 35a, and the third electrical connection element 373a is further connected to the circuit board 20 by welding a conductive lead 383a for connecting the third interdigital electrode 35a to the circuit.

[0115] In some embodiments, the first electrical connection element 371a and / or the second electrical connection element 372a and / or the third electrical connection element 373a is prepared from sheet-like gold, silver, copper, or a metal or alloy with low resistivity; the first electrical connection element 371a and / or the second electrical connection element 372a and / or the third electrical connection element 373a is in an arc-shaped sheet shape.

[0116] In some embodiments, the circuit operably connects one of the positive or negative electrodes of the cell 10 to the first interdigital electrode 33a and the second interdigital electrode 34a, and connects the other of the positive or negative electrodes of the cell 10 to the third interdigital electrode 35a, so as to conduct current through the first heating element 32a and the second heating element 36a simultaneously. For example Figure 8 As shown in Figure 8 , the third interdigital electrode 35a is used as a common negative electrode, which is grounded and connected to the negative electrode of the cell 10, and connects the first interdigital electrode 33a and the second interdigital electrode 34a to the positive electrode of the cell 10 simultaneously; then six heating regions that work in parallel are formed on each of the first heating element 32a and the second heating element 36a. During the overall operation, the first heating element 32a and the second heating element 36a are in parallel, so the total resistance value of the first heating element 32a and the second heating element 36a can be further reduced to 1 / 12 of the circumferential resistance value of the first heating element 32a / second heating element 36a, which is beneficial for increasing the power more. In some embodiments, the width of the third finger portion of the third interdigital electrode 35a is different from the width of the fourth finger portion, so that the resistance value on the first heating element 32a is different from the resistance value on the second heating element 36a, thereby forming different temperatures on the first heating element 32a and the second heating element 36a, so as to heat different sections of the aerosol generating article 1000 at different temperature differences respectively. Specifically, in some embodiments, the width of the third finger portion of the third interdigital electrode 35a is greater than the width of the fourth finger portion, so that the first heating element 32a has a smaller resistance value and thus a higher temperature or power.

[0117] Or in some variant embodiments, the first finger portion of the first interdigital electrode 33a and the second finger portion of the second interdigital electrode 34a have different widths, so that the resistance value on the first heating element 32a is different from the resistance value on the second heating element 36a, thereby forming different temperatures on the first heating element 32a and the second heating element 36a.

[0118] Or in yet some other variant embodiments, the circuit operably connects only one of the positive or negative electrodes of the cell 10 to one of the first interdigital electrode 33a and the second interdigital electrode 34a, and connects the other of the positive or negative electrodes of the cell 10 to the third interdigital electrode 35a, so as to conduct current only through one of the first heating element 32a and the second heating element 36a alone, and then only one of the first heating element 32a and the second heating element 36a works alone. For example, the circuit connects the first interdigital electrode 33a to the positive electrode of the cell 10 and connects the third interdigital electrode 35a to the negative electrode of the cell 10, so as to start only the first heating element 32a for heating alone.

[0119] According to Figures 5 to 8As shown, the second base 341a of the second interdigital electrode 34a is non-closed in the circumferential direction; and, the second base 341a has a notch 3411a; at least one fourth interdigital portion of the third interdigital electrode 35a extends through the notch 3411a to the second end 312a. Alternatively, at least one fourth interdigital portion extends into the notch 3411a. The third electrical connection element 373a contacts the fourth interdigital portion in the notch 3411a to form an electrical connection. It is advantageous to assemble the third electrical connection element 373a near the second end 312a to connect and conduct electricity with the third interdigital electrode 35a.

[0120] It should be noted that the description and drawings of the present application provide preferred embodiments of the present application, but are not limited to the embodiments described in this specification. Further, for those of ordinary skill in the art, improvements or transformations can be made based on the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present application.

Claims

1. An aerosol generating device configured to heat an aerosol generating article to generate an aerosol; characterized in that, Comprising: A heater for heating an aerosol-generating article; the heater comprising: A first end and a second end facing away from each other in a longitudinal direction; A heating element located between the first end and the second end, and defining a first spacing region between the heating element and the first end, and a second spacing region between the heating element and the second end; A first interdigital electrode and a second interdigital electrode for guiding current across the heating element; the first interdigital electrode comprising at least two first interdigital fingers arranged to extend at least partially across the heating element from the first spacing region towards the second spacing region; the second interdigital electrode comprising at least two second interdigital fingers arranged to extend at least partially across the heating element from the second spacing region towards the first spacing region; the first interdigital fingers and the second interdigital fingers being arranged alternately in the circumferential direction of the heater.

2. The aerosol generating device according to claim 1, wherein Comprising: A chamber for receiving an aerosol-generating article; The heater further comprising: A tubular substrate arranged to extend between the first end and the second end and at least partially surrounding or defining the chamber; The heating element being formed or incorporated on the substrate.

3. The aerosol generating device according to claim 1 or 2, characterized in that, The first interdigital fingers and / or the second interdigital fingers are arranged to extend along the longitudinal extent of the heater and extend across the heating element.

4. The aerosol generating device according to claim 1 or 2, characterized in that, The first interdigital electrode further comprises a first base located in the first spacing region; the first interdigital fingers being arranged to extend from the first base to the second spacing region; And / or, the second interdigital electrode further comprises a second base located in the second spacing region; the second interdigital fingers being arranged to extend from the second base to the first spacing region; And / or, the first base and the second base are spaced from the heating element.

5. The aerosol generating device according to claim 1 or 2, characterized in that, Each of the at least two first interdigital fingers extends at least partially between two adjacent second interdigital fingers; and each of the at least two second interdigital fingers extends at least partially between two adjacent first interdigital fingers.

6. The aerosol generating device according to claim 1 or 2, characterized in that, The heating element is circumferentially separated or defines a plurality of heating regions located between adjacent first interdigital fingers and second interdigital fingers; when current is guided across the heating element by the first interdigital electrode and the second interdigital electrode, the plurality of heating regions operate simultaneously in parallel.

7. An aerosol generating device configured to heat an aerosol generating article to generate an aerosol; characterized in that, Comprising: A chamber for receiving an aerosol-generating article; A heater for heating an aerosol-generating article; the heater comprising: A first end and a second end facing away from each other in a longitudinal direction; A first heating element and a second heating element arranged longitudinally spaced apart and at least partially surrounding the chamber; the first heating element being closer to the first end than the second heating element; A first interdigital electrode, a second interdigital electrode, and a third interdigital electrode for guiding current on the first heating element and the second heating element; the first interdigital electrode includes a first base portion located between the first heating element and the first end, and at least two first interdigital portions extending from the first base portion to the first heating element; the second interdigital electrode includes a second base portion located between the second heating element and the second end, and at least two second interdigital portions extending from the second base portion to the second heating element; the third interdigital electrode includes a third base portion located between the first heating element and the second heating element, at least two third interdigital portions extending from the third base portion to the first heating element, and at least two fourth interdigital portions extending from the third base portion to the second heating element; Along the circumferential direction of the heater, the first interdigital portions and the third interdigital portions are alternately arranged, and the second interdigital portions and the fourth interdigital portions are alternately arranged.

8. The aerosol generating device according to claim 7, wherein, For each of the first interdigital portions, there is a second interdigital portion longitudinally aligned therewith; And / or, the third interdigital portions and the fourth interdigital portions are aligned in the longitudinal direction of the heater; And / or, the width of the first interdigital portions is different from the width of the second interdigital portions; And / or, the width of the third interdigital portions is different from the width of the fourth interdigital portions.

9. The aerosol generating device according to claim 7, wherein, The second base portion is non-closed in the circumferential direction and defines a notch; At least one of the fourth interdigital portions extends into or through the notch.

10. A heater for an aerosol generating device; characterized in that, Comprising: A tubular substrate having a first end and a second end facing away from each other in the longitudinal direction; A heating element bonded to the substrate and located between the first end and the second end; a first spacer region is defined between the heating element and the first end, and a second spacer region is defined between the heating element and the second end; A first interdigital electrode and a second interdigital electrode for guiding current on the heating element; the first interdigital electrode includes at least two first interdigital portions arranged to extend at least partially on the heating element from the first spacer region to the second spacer region; the second interdigital electrode includes at least two second interdigital portions arranged to extend at least partially on the heating element from the second spacer region to the first spacer region; the first interdigital portions and the second interdigital portions are alternately arranged in the circumferential direction of the heater.

11. A heater for an aerosol generating device; characterized in that, Comprising: A tubular substrate having a first end and a second end facing away from each other in the longitudinal direction; A first heating element and a second heating element bonded to the substrate and arranged longitudinally spaced apart along the substrate; the first heating element is closer to the first end than the second heating element; The first interdigital electrode, the second interdigital electrode, and the third interdigital electrode are used to conduct current on the first heating element and the second heating element; the first interdigital electrode includes a first base located between the first heating element and the first end, and at least two first interdigital portions extending from the first base to the first heating element; the second interdigital electrode includes a second base located between the second heating element and the second end, and at least two second interdigital portions extending from the second base to the second heating element; the third interdigital electrode includes a third base located between the first heating element and the second heating element, at least two third interdigital portions extending from the third base to the first heating element, and at least two fourth interdigital portions extending from the third base to the second heating element; Along the circumferential direction of the substrate, the first interdigital portions and the third interdigital portions are alternately arranged, and the second interdigital portions and the fourth interdigital portions are alternately arranged.

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