Aerosol generating device

Abstract

The utility model provides an aerosol generating device which comprises a heating element at least partially surrounding or defining a cavity; a first spiral electrode and a second spiral electrode spaced apart from each other and coupled to the heating element in a spiral shape extending in the longitudinal direction of the heating element; the windings of the first spiral electrodes and the windings of the second spiral electrodes alternate in the longitudinal direction of the heating element; and the circuit can provide direct current for the heating element through the first spiral electrode and the second spiral electrode so as to enable the heating element to heat, and can also provide alternating current for the first spiral electrode or the second spiral electrode so as to generate a changing magnetic field to induce the susceptor to heat. According to the aerial fog generating device, direct current can be guided on the heating element through the first spiral electrode or the second spiral electrode, and the first spiral electrode or the second spiral electrode can serve as an inductance coil, so that a magnetic field is generated to induce heating of the susceptor when alternating current is provided.

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. Background Art

[0002] Smoking articles (eg, cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. People have attempted to replace these tobacco-burning articles by creating products that release compounds without combustion.

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

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

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

[0006] a heating element at least partially surrounding or defining the chamber;

[0007] A first spiral electrode and a second spiral electrode are spaced apart and are configured to be spirally shaped and extend in the longitudinal direction of the heating element and are coupled to the heating element; the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element;

[0008] The circuit is configured to provide a direct current to the heating element through the first spiral electrode and the second spiral electrode so that the heating element heats the aerosol generating product from the outside; and the circuit is also configured to provide an alternating current to the first spiral electrode or the second spiral electrode so that the first spiral electrode or the second spiral electrode generates a changing magnetic field to induce a receptor to heat the aerosol generating product.

[0009] In some embodiments, the susceptor is arranged to extend at least partially within the chamber; when the aerosol-generating article is received within the chamber, the susceptor is at least partially inserted into the aerosol-generating article;

[0010] Alternatively, the susceptor is arranged on the aerosol-generating article.

[0011] In some embodiments, the circuit is configured to selectively provide a direct current to the heating element and an alternating current to the first spiral electrode or the second spiral electrode;

[0012] And / or, the circuit is configured not to simultaneously provide a direct current to the heating element and an alternating current to the first spiral electrode or the second spiral electrode.

[0013] In some embodiments, the circuit is configured to alternately provide a direct current to the heating element and an alternating current to the first helical electrode or the second helical electrode during at least a portion of the time period.

[0014] In some embodiments, the circuit is configured to sequentially provide an alternating current to the first spiral electrode or the second spiral electrode during a first time period, and then provide a direct current to the heating element during a second time period;

[0015] Alternatively, the circuit is configured to sequentially provide a direct current to the heating element during a first time period, and then provide an alternating current to the first spiral electrode or the second spiral electrode during a second time period.

[0016] In some embodiments, the circuit is configured to alternately provide a direct current to the heating element and an alternating current to the first spiral electrode or the second spiral electrode during a third time period.

[0017] In some embodiments, the first spiral electrode and / or the second spiral electrode has 3 to 8 turns.

[0018] In some embodiments, the length of the first helical electrode and / or the second helical electrode is greater than the length of the receptor.

[0019] In some embodiments, the first spiral electrode and / or the second spiral electrode is configured to be a coating bonded to the heating element;

[0020] The width of the first spiral electrode and / or the second spiral electrode is between 0.5 and 3.5 mm.

[0021] In some embodiments, the windings of the first helical electrode and the second helical electrode are arranged to surround the heating element.

[0022] In some embodiments, the heating element has an exposed area not covered by the first spiral electrode and the second spiral electrode, and the exposed area is a continuous spiral shape.

[0023] In some embodiments, the heating element has a first end and a second end opposite to each other in a longitudinal direction, and the first spiral electrode and the second spiral electrode extend from the first end to the second end.

[0024] In some embodiments, the first spiral electrode and / or the second spiral electrode are arranged around the entire circumference of the heating element;

[0025] And / or, the first spiral electrode and the second spiral electrode are arranged around the same part of the heating element.

[0026] In some embodiments, the first helical electrode and / or the second helical electrode have a varying pitch.

[0027] Another embodiment of the present application further provides a control method for an aerosol generating device, the aerosol generating device comprising:

[0028] a chamber for receiving the aerosol generating article;

[0029] a heating element at least partially surrounding or defining the chamber;

[0030] A first spiral electrode and a second spiral electrode are spaced apart and are configured to be spirally shaped and extend in the longitudinal direction of the heating element and are coupled to the heating element; the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element;

[0031] The method comprises:

[0032] In a first time period, an alternating current is supplied to the first spiral electrode or the second spiral electrode to generate a changing magnetic field that penetrates the chamber, and then a direct current is supplied to the heating element in a second time period; or, a direct current is supplied to the heating element in a first time period, and then an alternating current is supplied to the first spiral electrode or the second spiral electrode in a second time period to generate a changing magnetic field that penetrates the chamber.

[0033] The above aerosol generating device can not only guide direct current on the heating element through the first spiral electrode or the second spiral electrode, but also use the first spiral electrode or the second spiral electrode as an inductor to generate a magnetic field to induce heating of the receptor when providing alternating current. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0035] Figure 1is a schematic diagram of an aerosol generating device provided by an embodiment;

[0036] Figure 2 yes Figure 1 A schematic structural diagram of an embodiment of a middle heater;

[0037] Figure 3 yes Figure 2 An exploded schematic diagram of a view of the central heater;

[0038] Figure 4 is a schematic diagram of some basic components of a circuit of an embodiment;

[0039] Figure 5 is a schematic diagram of an aerosol-generating article according to yet another alternative embodiment. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] One embodiment of the present application provides an aerosol generating device 100 that heats, rather than burns, an aerosol generating product 1000, such as a cigarette, so that at least one component of the aerosol generating product 1000 is volatilized or released to form an aerosol for inhalation, for example Figure 1 shown.

[0042] In an optional embodiment, the aerosol generating article 1000 preferably uses a tobacco-containing material that releases volatile compounds from the substrate when heated; or it can also be a non-tobacco material that can be heated and suitable for electric heating and smoking. The aerosol generating article 1000 preferably uses a solid substrate, which can include one or more of powder, particles, fragments, strips or sheets of one or more of herb leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; or, the solid substrate can contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

[0043] according to Figure 1 As shown, when the aerosol generating article 1000 is received in the aerosol generating device 100, a portion thereof is exposed outside the aerosol generating device 100, such as a filter tip, which is advantageous for a user to inhale.

[0044] The structure of the aerosol generating device 100 according to one embodiment of the present application can be seen in Figure 1 As shown, the overall appearance of the device is generally constructed in a longitudinal shape, and the aerosol generating device 100 includes:

[0045] a chamber having an opening 40; in use, an aerosol-generating article 1000 can be removably received in the chamber through the opening 40 of the chamber;

[0046] The heater 30 is arranged at least partially around or bounding the chamber; when the aerosol generating article 1000, such as a cigarette, is received in the chamber, the heater 30 surrounds the aerosol generating article 1000 from the outside and heats it to form an aerosol for inhalation;

[0047] The receptor 50 is configured to generate heat when penetrated by the changing magnetic field, thereby heating the aerosol generating product 1000, such as a cigarette, so that at least one component of the aerosol generating product 1000 is volatilized to form an aerosol for inhalation;

[0048] 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;

[0049] The circuit board 20 , such as a PCB board or an FPC board, is provided with a circuit for conducting current between the battery cell 10 and the heater 30 .

[0050] In one embodiment, the DC supply voltage provided by the battery cell 10 is in the range of about 2.5V to about 9.0V, and the amperage of the DC current provided by the battery cell 10 is in the range of about 2.5A to about 20A. In a specific embodiment, the DC supply voltage provided by the battery cell 10 is 3.2V to 4.2V.

[0051] exist Figure 1 In the illustrated embodiment, the heater 30 is arranged to be tubular in shape, and a chamber for receiving the aerosol-generating article 1000 is formed or defined by at least a portion of the tubular hollowness of the heater 30. When the aerosol-generating article 1000 is received in the chamber, the heater 30 at least partially surrounds or encloses the aerosol-generating article 1000 and heats the aerosol-generating article 1000 from the periphery. Also, when the aerosol-generating article 1000 is received in the chamber, the aerosol-generating article 1000 is at least partially contained and retained in the heater 30.

[0052] In some embodiments, the susceptor 50 is an induction heater that can be penetrated by a changing magnetic field and generate heat. The susceptor 50 is made of a metal or alloy having sensitivity, for example, the susceptor 50 can be made of grade 430 stainless steel (SS430), grade 420 stainless steel (SS420), and an alloy material containing iron and nickel, such as Permalloy.

[0053] exist Figure 1In the illustrated embodiment, the susceptor 50 is configured to be arranged to extend at least partially within the chamber for insertion into the aerosol generating article 1000 for heating. For example, in some embodiments, the susceptor 50 is configured to be in the shape of a pin, a blade, or a needle. In some specific embodiments, the susceptor 50 has a length of 8 mm to 15 mm; and the susceptor 50 has a diameter of 1.5 mm to 4 mm. Or in some other embodiments, the susceptor 50 is configured to be tubular for heating from the outside of the aerosol generating article 1000. Or in some other embodiments, the susceptor 50 can be configured to be in the shape of a solenoid, or more shapes such as a bend, a cylinder, etc.

[0054] Figures 2 to 3 A schematic diagram of a heater 30 according to an embodiment is shown, in which the heater 30 comprises:

[0055] a tubular substrate 31; in use, a chamber for accommodating and holding the aerosol generating article 1000 is at least partially defined by the inner hollow of the substrate 31; and,

[0056] The heating element 32 is 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 deposition, spraying, printing or wrapping. Or in some other embodiments, the heating element 32 is formed on the inner surface of the substrate 31.

[0057] In some embodiments, the circumferential length or circumference of the substrate 31 is greater than the length of the substrate 31 along 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 about 10 mm to 15 mm and an inner diameter of about 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.

[0058] 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.

[0059] 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 film wrapped or bonded to the substrate 31. Or in some other optional embodiments, the resistive heating element 32 can also be a resistive heating film wound or bonded to the substrate 31.

[0060] 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 spraying it on the outer surface of the tubular substrate 31 through atmospheric plasma spraying and then curing it.

[0061] In some embodiments, the heating element 32 is a resistive heating element; by directing an electric current through the heating element 32, the heating element 32 can be heated by resistive Joule heating, thereby heating the aerosol generating article 1000. Also, in some embodiments, the heating element 32 used for heating by generating resistive Joule heating can include graphite or a resistive metal or alloy; wherein the metal or alloy is, for example, nickel-chromium alloy, nickel-iron alloy, platinum, tungsten, silver, aluminum, titanium, molybdenum, manganese, or alloys containing them.

[0062] When the heating element 32 is applied to the above heating element 32 heated by resistive heating, the material of the substrate 31 is a material with good thermal conductivity, such as ceramic, glass, surface insulating metal or alloy such as anodized aluminum, aluminum alloy, copper alloy, stainless steel, etc. And in some embodiments, the thermal conductivity of the substrate 31 is at least 10W / mk, preferably or at least 100W / mk; or in some embodiments, the thermal conductivity of the substrate 31 is greater than 200W / mk or higher. In some embodiments, the substrate 31 includes a metal suitable for the above high thermal conductivity such as aluminum, copper, titanium, or an alloy containing at least one of them. In some embodiments, the wall thickness of the substrate 31 is between 0.1 and 0.5 mm; more specifically, for example, the wall thickness of the substrate 31 is between 0.15 and 0.2 mm.

[0063] In some other embodiments, the heating element 32 is an infrared emitting layer, such as an electrically induced infrared emitting layer; by providing a DC voltage to the heating element 32, the heating element 32 can be driven by the voltage to radiate infrared rays, thereby heating the aerosol generating product 1000. When the heating element 32 used for heating by radiating infrared rays is applied, the material of the substrate 31 is a material that is infrared-transmissive, such as quartz, glass, ceramic, etc. In some embodiments, the heating element 32 for radiating infrared rays can be a coating made of ceramic materials such as zirconium, Fe-Mn-Cu system, tungsten system, or transition metals 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., and these metal oxides can radiate infrared rays with heating effect when heated to an appropriate heating temperature.

[0064] according to Figures 2 to 3 In the embodiment shown, the base body 31 comprises:

[0065] The first end 311 and the second end 312 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 substrate 31 respectively define two ends of the heater 30; and the inner hollow of the substrate 31 at least defines a chamber for receiving the aerosol generating article 1000; wherein the first end 311 is arranged closer to or toward the opening 40;

[0066] The heating element 32 is arranged to extend between a first end 311 and a second end 312 .

[0067] according to Figures 2 to 3 As shown, the heater 30 also includes:

[0068] The first spiral electrode 33 and the second spiral electrode 34 are used to guide the current on the heating element 32. In some embodiments, the first spiral electrode 33 and the second spiral electrode 34 are electrode coatings formed by spraying, printing, deposition and other processes with low resistivity electrode materials. In some optional embodiments, the first spiral electrode 33 and the second spiral electrode 34 are made of low resistivity gold, silver, copper or their alloys. Or in some other variant embodiments, the first spiral electrode 33 and the second spiral electrode 34 can also be replaced with a thinner sheet structure, which is formed outside the substrate 31 by welding or close contact.

[0069] according to Figure 2 and Figure 3 As shown, the first spiral electrode 33 and / or the second spiral electrode 34 cover or are combined on the surface of the heating element 32. Figure 2 and Figure 3 As shown, the first spiral electrode 33 and / or the second spiral electrode 34 are configured to be spirally shaped extending in the longitudinal direction of the heater 30. The first spiral electrode 33 and / or the second spiral electrode 34 are arranged around the heating element 32. Alternatively, the first spiral electrode 33 and / or the second spiral electrode 34 are arranged around the entire circumference of the heating element 32.

[0070] In an embodiment, the first spiral electrode 33 and / or the second spiral electrode 34 extend from the first end 311 to the second end 312. Alternatively, the first spiral electrode 33 and / or the second spiral electrode 34 have substantially the same length and are disposed around the same portion of the heating element 32 in the longitudinal direction of the heating element 32 / heater 30, rather than the first spiral electrode 33 and the second spiral electrode 34 being disposed around different portions of the heating element 32 in the longitudinal direction.

[0071] In an embodiment, the first spiral electrode 33 and the second spiral electrode 34 are wound around each other to form a double spiral structure. In an embodiment, the windings of the first spiral electrode 33 and the windings of the second spiral electrode 34 are alternated in the longitudinal direction of the heating element 32 / heater 30.

[0072] according to Figure 2 and Figure 3 In the embodiment shown, a portion of the heating element 32 is covered by the first spiral electrode 33 and the second spiral electrode 34; and the heating element 32 also has an exposed area between the first spiral electrode 33 and the second spiral electrode 34. In use, by connecting the first spiral electrode 33 and the second spiral electrode 34 to the positive and negative electrodes of the battery cell 10, respectively, current can be guided on the exposed area of ​​the heating element 32 so that the exposed area of ​​the heating element 32 generates resistive Joule heat and generates heat, for example Figure 2 The current i1 flows from the first spiral electrode 33 to the second spiral electrode 34 via the exposed area; the heat of the exposed area is then transferred to other parts of the heating element 32 so that the heating element 32 is heated as a whole, and finally the aerosol generating article is heated by the heating element 32. In an embodiment, the exposed area is a continuous spiral.

[0073] according to Figure 2 and Figure 3 In the embodiment shown, the spacing between the windings of the adjacent first spiral electrode 33 and the windings of the second spiral electrode 34 is constant in the longitudinal direction of the heater 30. In some embodiments, the spacing between the windings of the adjacent first spiral electrode 33 and the windings of the second spiral electrode 34 is between 0.2 and 4 mm. Accordingly, the width of the exposed area of ​​the heating element 32 is also between 0.2 and 4 mm.

[0074] exist Figure 2 and Figure 3 In the illustrated embodiment, the first spiral electrode 33 and the second spiral electrode 34 have a constant pitch, thereby forming a constant spacing between them. In some embodiments, for example, the first spiral electrode 33 has a first pitch, the second spiral electrode 34 has a second pitch, and the first pitch is equal to the second pitch; so that the spacing between them in the double spiral structure formed by them is constant in the longitudinal direction. Among them, the pitch or spiral pitch is a term in the field of physics and mathematics, which refers to the distance between two adjacent points of a spiral object in the axial direction. Or in some specific scenarios, the pitch or spiral pitch is the length of a complete winding of a spiral object in the axial direction.

[0075] Or in some other variant embodiments, the spacing between the windings of the adjacent first spiral electrodes 33 and the windings of the second spiral electrodes 34 varies or is non-constant in the longitudinal direction of the heater 30. Or, the spacing between the windings of the adjacent first spiral electrodes 33 and the windings of the second spiral electrodes 34 varies in the longitudinal direction of the heater 30; accordingly, the width of the exposed area of ​​the heating element 32 also varies accordingly in the longitudinal direction. During operation, the exposed area of ​​the heating element 32 has different current densities in the longitudinal direction, thereby forming different working power and heating temperature in the longitudinal direction of the heating element 32. For example, the spacing between the windings of the adjacent first spiral electrodes 33 and the windings of the second spiral electrodes 34 gradually increases in the direction close to the second end 312; during operation, the working power and heating temperature in the longitudinal direction of the heating element 32 gradually decrease in the direction close to the second end 312. Or for example, the spacing between the windings of the adjacent first spiral electrode 33 and the windings of the second spiral electrode 34 gradually decreases in the direction approaching the second end 312; during operation, the longitudinal working power and heating temperature of the heating element 32 gradually increase in the direction approaching the second end 312.

[0076] according to Figure 3 As shown, conductive leads are welded or arranged on the first spiral electrode 33 and the second spiral electrode 34, respectively, so as to conductively connect the first spiral electrode 33 and the second spiral electrode 34 to the circuit board 20. Specifically, a first conductive lead 331 is arranged on the first spiral electrode 33 by welding or the like, and is connected to the circuit board 20 through the first conductive lead 331; a second conductive lead 341 is arranged on the second spiral electrode 34 by welding or the like, and is connected to the circuit board 20 through the second conductive lead 341. The circuit board 20 outputs a direct current to the heating element 32 through the first spiral electrode 33 and the second spiral electrode 34, so that the heating element 32 heats the aerosol generating article 1000.

[0077] In some embodiments, the circuit board 20 is configured to provide an alternating current to at least one of the first spiral electrode 33 or the second spiral electrode 34, so that at least one of the first spiral electrode 33 or the second spiral electrode 34 generates a changing magnetic field that can penetrate the chamber / receptor 50 to induce eddy current heating in the receptor 50 to heat the aerosol generating article 1000.

[0078] For example, Figure 3 In the specific embodiment shown, an alternating current is provided to the spiral first spiral electrode 33, so that the spiral first spiral electrode 33 acts as an inductor to generate a changing magnetic field to induce eddy current heating in the susceptor 50. Figure 3In the illustrated embodiment, a third conductive lead 332 is also arranged on the first spiral electrode 33, and is connected to the circuit board 20 via a second conductive lead 341. Figure 3 As shown, the third conductive lead 332 and the first conductive lead 331 are respectively connected to two ends of the first spiral electrode 33. In use, the circuit board 20 provides an alternating current to the first spiral electrode 33 through the first conductive lead 331 and the third conductive lead 332.

[0079] In some embodiments, the first spiral electrode 33 and / or the second spiral electrode 34 have an extension length of 6 to 15 mm. In some embodiments, the first spiral electrode 33 and / or the second spiral electrode 34 have approximately 3 to 8 turns. The length of the susceptor 50 is less than the length of the first spiral electrode 33 and / or the second spiral electrode 34; the susceptor 50 is substantially completely located within the first spiral electrode 33 and / or the second spiral electrode 34.

[0080] In some embodiments, the width of the first spiral electrode 33 and / or the second spiral electrode 34 acting as an inductor is between 0.5 and 3.5 mm. Figure 3 In the specific embodiment of FIG. 5 , the width d1 of the first spiral electrode 33 serving as an inductor is approximately 1.5 mm.

[0081] In some embodiments, it is advantageous that the pitch of the first helical electrode 33 and / or the second helical electrode 34 acting as inductive coils is varied so as to make the magnetic fields generated by them have different strengths in the longitudinal direction of the chamber.

[0082] In some embodiments, the frequency of the alternating current provided by the circuit board 20 to the first spiral electrode 33 or the second spiral electrode 34 is between 80KHz and 2000KHz; more specifically, the frequency may be in the range of approximately 200KHz to 800KHz; more specifically, the frequency may be in the range of approximately 400KHz to 800KHz; more specifically, the frequency may be in the range of approximately 600KHz to 1500KHz.

[0083] In some embodiments, Figure 4 A schematic diagram of a circuit arranged on a circuit board 20 of an embodiment is shown. In this embodiment, the circuit includes a DC output module and an AC output module to selectively output DC and AC.

[0084] The DC output module includes:

[0085] A first access point 211 for connection and access of a first spiral electrode 33;

[0086] A second access point 212 for connection and access of a second spiral electrode 34;

[0087] The first switch S1 is connected between the voltage output end of the battery cell 10, such as the positive electrode and the first access point 211, and is connected to the negative electrode of the battery cell 10 by grounding through the second access point 212; thus, the DC output module controls the first switch S1 to conduct and provides the DC voltage output by the battery cell 10 to the heating element 32 via the first spiral electrode 33 and the second spiral electrode 34.

[0088] Among them, the AC output module includes:

[0089] The inverter 222 includes an LC oscillator composed of a capacitor C1 and the first spiral electrode 33 , and an inverter bridge driving the LC oscillator to oscillate to form an alternating current flowing through the first spiral electrode 33 ;

[0090] The third access point 213 and the fourth access point 214 are used for connecting and accessing the two ends of the first spiral electrode 33, so that the first spiral electrode 33 acting as an inductor and the capacitor C1 form an LC oscillator;

[0091] The second switch S2 is connected between the voltage output end of the battery cell 10 , for example, the positive electrode, and the inverter 222 ; wherein the inverter 222 is used to convert the DC voltage output by the battery cell 10 into an AC current and provide it to the first spiral electrode 33 .

[0092] Specifically in Figure 4 In the embodiment, the LC oscillator is a series LC oscillator in which the capacitor C1 is connected in series with the first spiral electrode 33; accordingly, the inverter bridge includes a half bridge consisting of a switch tube Q1 and a switch tube Q2. Alternatively, in some other variant embodiments, the LC oscillator 222 may also be a parallel LC oscillator in which the capacitor C1 is connected in parallel with the first spiral electrode 33, or an LCC oscillator, etc.; correspondingly, the inverter bridge may also include a full bridge, an H bridge, etc., which includes four switch tubes.

[0093] In some embodiments, the circuit of the circuit board 20 can only selectively output a direct current to the heating element 32 through the first spiral electrode 33 and the second spiral electrode 34 , or output an alternating current to one of the first spiral electrode 33 and the second spiral electrode 34 .

[0094] In some embodiments, the circuit of the circuit board 20 is configured to output a direct current to the heating element 32 according to a first heating curve with a predetermined heating duration and / or a first power mode, so that the heating element 32 heats the aerosol generating article 1000 according to the first heating curve. And in some embodiments, the circuit of the circuit board 20 is configured to output an alternating current to one of the first spiral electrode 33 and the second spiral electrode 34 according to a second heating curve with a predetermined heating duration and / or a first power mode, so that the susceptor 50 heats the aerosol generating article 1000 according to the second heating curve. For example, the applicant provides a variety of modes and content details about heating the aerosol generating article 1000 according to a heating curve for a predetermined time in Chinese patent CN112335940A, etc., and the above-mentioned documents are fully incorporated herein by reference.

[0095] In some embodiments, the aerosol generating article 1000 received in the chamber is heated for a predetermined time, and the predetermined time is based on the time a user usually smokes a cigarette, for example, 240 seconds. Or in some embodiments, the predetermined time is the time from when the aerosol generating article 1000 is heated to generate aerosol to when the components are substantially volatilized. Accordingly, the battery cell 10 may have sufficient power to allow the aerosol generating article 1000 to be continuously heated to generate aerosol for about 240 seconds, corresponding to the typical time consumed to smoke a conventional cigarette, or for a multiple of about 240 seconds.

[0096] In some further embodiments, the process of heating the aerosol generating article 1000 by the circuit control of the circuit board 20 for a predetermined period of time includes:

[0097] In the first time period (0 to t1), the control is to output an alternating current to one of the first spiral electrode 33 or the second spiral electrode 34, thereby inducing the susceptor 50 to form eddy current heating and thus heat the aerosol generating article 1000;

[0098] During the second time period (time t1 to t2), the first spiral electrode 33 and the second spiral electrode 34 are controlled to output direct current to the heating element 32, so that the heating element 32 heats the aerosol generating article 1000 from the outside.

[0099] In the above heating process, the receptor 50 is first controlled to quickly form eddy current heat to heat the aerosol generating product 1000 from the inside, and then the heating element 32 heats the aerosol generating product 1000 from the outside, so that the aerosol generating product 1000 as a whole can be fully heated.

[0100] Alternatively, in some embodiments, the process of heating the aerosol generating article 1000 by the circuit control of the circuit board 20 further includes:

[0101] In the third time period (t2 to end), direct current is supplied to the heating element 32 and alternating current is output to one of the first spiral electrode 33 or the second spiral electrode 34, so that the first heating element 32 and the susceptor 50 are heated alternately.

[0102] In some embodiments, the first time period is approximately between 40 and 80 seconds; and / or, the second time period is approximately between 40 and 80 seconds; and / or, the third time period is approximately between 80 and 160 seconds.

[0103] In some embodiments, when controlling to output DC and AC alternately, the duration of outputting DC and the duration of outputting AC are less than 5s; for example, the DC is alternately output for a duration of 3s, followed by the AC output for a duration of 3s.

[0104] In some embodiments, when outputting DC and AC alternately, the duration of outputting DC and the duration of outputting AC are the same; for example, both outputting DC and outputting AC are alternately controlled according to the duration of 3s. In some other embodiments, when outputting DC and AC alternately, the duration of outputting DC and the duration of outputting AC are different; specifically, for example, the duration of outputting DC is greater than the duration of outputting AC. For example, DC is output alternately according to the duration of 3s, and AC is output alternately according to the duration of 2s.

[0105] or Figure 5 A schematic diagram of an aerosol generating article 1000a of another embodiment is shown; in this embodiment, the susceptor 50a is prepared or arranged in the aerosol generating article 1000a; the susceptor 50a is arranged substantially along the longitudinal extension of the aerosol generating article 1000a; and the susceptor 50a is arranged substantially along the central axis of the aerosol generating article 1000a. When the aerosol generating article 1000a is received in the chamber of the aerosol generating device 100, the susceptor 50a can be inductively coupled with the first spiral electrode 33 or the second spiral electrode 34, and then penetrated by the magnetic field generated by the first spiral electrode 33 and the second spiral electrode 34 to generate heat, thereby heating from the inside of the aerosol generating article 1000a to generate an aerosol.

[0106] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but are not limited to the embodiments described in the specification. Furthermore, it is possible for a person of ordinary skill in the art to make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present application.

Claims

1. An aerosol generating device, configured to heat an aerosol generating article to generate an aerosol; characterized in that: include: a chamber for receiving the aerosol generating article; a heating element at least partially surrounding or defining the chamber; A first spiral electrode and a second spiral electrode are spaced apart and are configured to be spirally shaped and extend in the longitudinal direction of the heating element and are coupled to the heating element; the windings of the first spiral electrode and the windings of the second spiral electrode are alternated in the longitudinal direction of the heating element; The circuit is configured to provide a direct current to the heating element through the first spiral electrode and the second spiral electrode so that the heating element heats the aerosol generating product; and the circuit is also configured to provide an alternating current to the first spiral electrode or the second spiral electrode so that the first spiral electrode or the second spiral electrode generates a changing magnetic field to induce a receptor to heat the aerosol generating product.

2. The aerosol generating device according to claim 1, characterized in that The susceptor is arranged to extend at least partially within the chamber; when the aerosol-generating article is received in the chamber, the susceptor is at least partially inserted into the aerosol-generating article; Alternatively, the susceptor is arranged on the aerosol-generating article.

3. The aerosol generating device according to claim 1 or 2, characterized in that: The circuit is configured to selectively provide a direct current to the heating element and an alternating current to the first spiral electrode or the second spiral electrode; And / or, the circuit is configured not to simultaneously provide a direct current to the heating element and an alternating current to the first spiral electrode or the second spiral electrode.

4. The aerosol generating device according to claim 1 or 2, characterized in that: The circuit is configured to alternately provide a direct current to the heating element and an alternating current to the first spiral electrode or the second spiral electrode during at least a portion of a time period.

5. The aerosol generating device according to claim 1 or 2, characterized in that: The circuit is configured to sequentially provide an alternating current to the first spiral electrode or the second spiral electrode during a first time period, and then provide a direct current to the heating element during a second time period; Alternatively, the circuit is configured to sequentially provide a direct current to the heating element during a first time period, and then provide an alternating current to the first spiral electrode or the second spiral electrode during a second time period.

6. The aerosol generating device according to claim 5, characterized in that The circuit is configured to alternately provide a direct current to the heating element and an alternating current to the first spiral electrode or the second spiral electrode during a third time period.

7. The aerosol generating device according to claim 1 or 2, characterized in that: The first spiral electrode and / or the second spiral electrode has 3 to 8 turns.

8. The aerosol generating device according to claim 1 or 2, characterized in that: The length of the first spiral electrode and / or the second spiral electrode is greater than the length of the receptor.

9. The aerosol generating device according to claim 1 or 2, characterized in that: The first spiral electrode and / or the second spiral electrode are configured to be bonded to a coating of the heating element; The width of the first spiral electrode and / or the second spiral electrode is between 0.5 and 3.5 mm.

10. The aerosol generating device according to claim 1 or 2, characterized in that: The windings of the first helical electrode and the second helical electrode are arranged to surround the heating element.

11. The aerosol generating device according to claim 10, characterized in that The heating element has an exposed area not covered by the first spiral electrode and the second spiral electrode, and the exposed area is in a continuous spiral shape.

12. The aerosol generating device according to claim 1 or 2, characterized in that: The heating element has a first end and a second end opposite to each other in a longitudinal direction, and the first spiral electrode and the second spiral electrode extend from the first end to the second end.

13. The aerosol generating device according to claim 1 or 2, characterized in that: The first spiral electrode and / or the second spiral electrode are arranged around the entire circumference of the heating element; And / or, the first spiral electrode and the second spiral electrode are arranged around the same part of the heating element.

14. The aerosol generating device according to claim 1 or 2, characterized in that: The first helical electrode and / or the second helical electrode have a varying pitch.

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