Aerosol generating device, system, and control method

Abstract

The present application discloses an aerosol generating device, a system, and a control method. The aerosol generating device comprises: a battery cell; a first heater and a second heater, wherein the first heater is configured to be at least partially inserted into an aerosol generating product for heating, and the second heater is configured to surround and heat at least part of the aerosol generating product; and a controller, which is configured to control the heating energy supplied to the first heater and the second heater by the battery cell, so that within the entire heating cycle, the temperature of the first heater is greater than the temperature of the second heater. According to the aerosol generating device, the system, and the control method, by controlling the first heater to perform main heating, and the second heater to perform auxiliary heating, the aerosol generating product can be fully baked, thereby increasing the amount of release of an aerosol, and releasing the aerosol smoothly.

Description

Aerosol generating device, system and control method

[0001] Cross-references to related documents

[0002] This application claims priority to the prior application with application number 202410168510.3 filed with the State Intellectual Property Office of China on February 5, 2024, entitled “Aerosol Generating Device, System and Control Method”. The contents of the above-mentioned prior application are incorporated into this text by introduction. Technical Field

[0003] The present application relates to the field of aerosol generation technology, and in particular to an aerosol generation device, system and control method. Background Art

[0004] The heater of the aerosol-generating device may be configured to be inserted into the aerosol-generating article for heating, commonly known as central or internal heating. The heater may also be configured to surround at least part of the aerosol-generating article for heating, commonly known as peripheral or circumferential heating.

[0005] Using either a central heating structure or a circumferential heating structure alone presents various drawbacks, such as large temperature gradients within the product, resulting in uneven heating and low product baking efficiency. To avoid these drawbacks, existing aerosol generating devices typically employ a combination of central and circumferential heating. However, this approach suffers from issues such as uneven aerosol release, poor consistency, and a poor puffing experience. Summary of the Invention

[0006] The present application provides an aerosol generating device, system and control method to solve the problem of uneven aerosol release in aerosol generating devices that use a combination of central heating and circumferential heating.

[0007] The present application provides an aerosol generating device, comprising:

[0008] Battery cells, used to provide electricity;

[0009] a first heater configured to be at least partially inserted into an interior of an aerosol-generating article for heating, and a second heater configured to surround at least a portion of the aerosol-generating article for heating;

[0010] The controller is configured to control the heating energy supplied by the battery cell to the first heater and the second heater so that the temperature of the first heater is greater than the temperature of the second heater throughout the entire heating cycle.

[0011] The present application also provides an aerosol generating system, comprising an aerosol generating device and an aerosol generating article; the aerosol generating article is provided with a first heater, the first heater being configured to generate heat when penetrated by a changing magnetic field;

[0012] The aerosol generating device comprises:

[0013] Battery cells, used to provide electricity;

[0014] A magnetic field generator, used to generate a changing magnetic field;

[0015] a second heater configured to heat around at least a portion of the aerosol-generating article;

[0016] The controller is configured to control the heating energy supplied by the battery cell to the first heater and the second heater so that the temperature of the first heater is greater than the temperature of the second heater throughout the entire heating cycle.

[0017] The present application also provides a method for controlling an aerosol generating device, wherein the aerosol generating device comprises:

[0018] Battery cells, used to provide electricity;

[0019] a first heater configured to be at least partially inserted into an interior of an aerosol-generating article for heating, and a second heater configured to surround at least a portion of the aerosol-generating article for heating;

[0020] The control method includes:

[0021] The heating energy supplied by the battery cell to the first heater and the second heater is controlled so that the temperature of the first heater is greater than the temperature of the second heater throughout the entire heating cycle.

[0022] The aerosol generating device, system, and control method provided in the embodiments of the present application can fully bake the aerosol generating product, increase the amount of aerosol released, and release the aerosol smoothly by controlling the first heater to perform primary heating and the second heater to perform auxiliary heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] FIG1 is a cross-sectional schematic diagram of an aerosol generating system provided in an embodiment of the present application;

[0025] FIG2 is a partial schematic diagram of FIG1 ;

[0026] FIG3 is a schematic diagram of FIG2 in an extraction state;

[0027] FIG4 is a cross-sectional schematic diagram of another aerosol generating system provided in an embodiment of the present application;

[0028] FIG5 is a partial enlarged schematic diagram of FIG4;

[0029] FIG6 is a circuit block diagram of an aerosol generating device provided in an embodiment of the present application;

[0030] FIG7 is a schematic diagram of a temperature curve of an aerosol generating device provided in an embodiment of the present application;

[0031] FIG8 is another schematic diagram of a temperature curve of the aerosol generating device provided in an embodiment of the present application;

[0032] FIG9 is another schematic diagram of a temperature curve of the aerosol generating device provided in an embodiment of the present application;

[0033] FIG10 is another schematic diagram of a temperature curve of the aerosol generating device provided in an embodiment of the present application;

[0034] FIG11 is another schematic diagram of a temperature curve of the aerosol generating device provided in an embodiment of the present application;

[0035] FIG12 is a schematic diagram of a control method for an aerosol generating device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The present application is described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but are not intended to limit the present application in any form. It should be noted that those skilled in the art may make several variations and improvements without departing from the scope of the present application. These all fall within the scope of protection of the present application.

[0037] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0038] It should be noted that, if there is no conflict, the various features in the embodiments of the present application can be combined with each other and are all within the scope of protection of the present application. In addition, although the functional modules are divided in the device schematic and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a different order than the module division in the device or the order in the flow chart. In addition, the words "first", "second", "third", etc. used herein do not limit the data and execution order, but only distinguish between the same items or similar items with basically the same functions and effects.

[0039] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0040] In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0041] Referring to Figures 1 to 3 , an embodiment of the present application provides an aerosol generating device, comprising: a bracket 1 , an extractor 2 , a first heater 3 and a temperature detector 4 .

[0042] The bracket 1 has a first accommodating cavity 11 therein, and the first heater 3 is configured in a sheet or needle shape extending axially along the first accommodating cavity 11 .

[0043] The extractor 2 includes a second heater 21, a support portion 22, and a base 23. The second heater 21 extends axially and has a second accommodating cavity 211 for removably receiving at least a portion of the aerosol-generating article 6. The first heater 3 and the second heater 21 at least partially overlap in the axial direction of the aerosol-generating article 6. When the extractor 2 is coupled to the bracket 1, the bracket 1 supports the support portion 22; the second heater 21 is at least partially disposed in the first accommodating cavity 11, surrounding the aerosol-generating article 6 received in the second accommodating cavity 211 and heating it at least partially; the first heater 3 passes through the base 23 and enters the second accommodating cavity 211, so as to be inserted into the aerosol-generating article 6 received in the second accommodating cavity 211 and thereby heat it.

[0044] The first heater 3 and the second heater 21 cooperate with each other to heat the circumference and center of the aerosol generating product 6, which helps to achieve a uniform heating effect on the aerosol generating product 6 and improve the baking rate and smoking experience of the aerosol generating product 6.

[0045] The temperature detector 4 is provided on the extractor 2 to detect the temperature of the second heater 21. The temperature detector 4 is configured to move relative to the support 1 along with the extractor 2. By installing the temperature detector 4 on the extractor 2, the circumferential heating temperature of the extractor 2 can be monitored.

[0046] In one example, the temperature detector 4 includes a detection head 41, a conductive terminal 42, and a lead 43 connecting the conductive terminal 42 and the detection head 41. The detection head 41 is attached to or embedded in the outer surface of the second heater 21 to increase the accuracy and sensitivity of temperature detection, and at the same time prevent the detection head 41 from falling off from the second heater 21 during the movement of the extractor 2. The detection head 41 can be made of conductive materials such as nickel, nickel-chromium, aluminum, stainless steel, carbon film, etc. The conductive terminal 42 is electrically connected to the detection head 41 through the lead 43. Specifically, the lead 43 is attached to, printed on, or embedded in the surface of the second heater 21 to prevent the lead 43 from loosening from the surface of the second heater 21.

[0047] It should be noted that the temperature detector 4 may be a temperature sensor device such as a thermocouple, an NTC thermistor (Negative Temperature Coefficient, negative temperature coefficient thermistor) or a PTC thermistor (Positive Temperature Coefficient, positive temperature coefficient thermistor).

[0048] In a specific example, the temperature detector 4 includes a thermistor element, which can be an NTC thermistor element or a PTC thermistor element; the thermistor element forms a detection head 41 of the temperature detector 4, and the detection head 41 is electrically connected to the conductive terminal 42 through a lead 43. The detection head 41 is attached to or embedded in the outer surface of the second heater 21 to increase the accuracy and sensitivity of temperature detection, and the temperature of the second heater 21 is calculated by monitoring the resistance change.

[0049] In another specific example, the temperature detector 4 includes a thermocouple element, and the thermocouple includes a first thermocouple wire and a second thermocouple wire; one end of the first thermocouple wire and the second thermocouple wire are electrically connected to each other, and the electrically connected ends are twisted to form a detection head 41 of the temperature detector 4. The other ends of the first thermocouple wire and the second thermocouple wire are electrically connected to a conductive terminal 42, and the temperature of the second heater 21 is calculated by detecting the potential difference generated between the first thermocouple wire and the second thermocouple wire. It should be noted that the first thermocouple wire and the second thermocouple wire are made of different metal wires, and the metal wires can be nickel, nickel-chromium alloy, nickel-silicon alloy, nickel-chromium-copper, constanton, iron-chromium alloy, etc., which have a high melting point and can maintain a stable shape without melting at the sintering temperature.

[0050] The aerosol generating device also includes a power supply component and an electric contact 12 electrically connected to the power supply component. The electric contact 12 is fixed to the bracket 1. The bracket 1 can be made of an insulating material or the outer side of the bracket 1 can be wrapped with an insulating layer to insulate the electric contact 12 from the bracket 1. When the extractor 2 moves to the working position, the conductive terminal 42 abuts the electric contact 12 to form an electrical connection, thereby forming an electrical circuit between the detection head 41 and the electric contact 12 through the wire 43 and the conductive terminal 42. Furthermore, the electric contact 12 is also connected to the controller, so that the controller forms an electrical connection with the temperature detector 4 through the electric contact 12 to obtain the detection data of the temperature detector 4.

[0051] In one example, the support 1 is coupled to a magnetic field generator 5 for generating a varying magnetic field. The first heater 3 includes a susceptor material that generates heat when penetrated by the varying magnetic field, thereby heating the aerosol-generating article 6 received in the second receiving chamber 211. The susceptor material includes nickel alloys, iron alloys, nickel-iron alloys, iron-cobalt alloys, iron-silicon alloys, iron-aluminum alloys, and iron-niobium alloys. In some implementations, the susceptor material includes, for example, grade 430 stainless steel (SS430), grade 420 stainless steel (SS420), and alloys containing iron and nickel (such as permalloy).

[0052] In a specific example, the magnetic field generator 5 includes an induction coil arranged on the bracket 1, and a resonant circuit (including a series and / or parallel resonant circuit) formed by the induction coil and the capacitor is used to form an alternating current flowing through the induction coil during the resonance process, so that the induction coil generates an alternating magnetic field to induce the first heater 3 to heat up.

[0053] In some examples, the induction coil may be a coil formed by winding Litz wire as is known in the art. Alternatively, the coil may be formed by winding a thin conductive tape to reduce the lateral dimension of the aerosol generating device, where the lateral dimension is substantially perpendicular to the axial direction of the coil.

[0054] In some examples, the second heater 21 may also include a resistance material or an infrared electric heating material to heat the aerosol generating article 6 received in the second receiving cavity 211 by resistance or infrared heating.

[0055] It is understandable that in other examples, the first heater 3 can adopt a resistance or infrared heating method, and the second heater 21 can also include a sensing material, which generates heat when penetrated by the changing magnetic field, thereby heating the aerosol generating product 6 received in the second accommodating cavity 211.

[0056] The aerosol generating device also includes a battery cell and circuit 7. The battery cell provides power for operating the aerosol generating device. For example, the battery cell can provide power to the first heater 3 and the second heater 21, causing the heaters to generate heat and generate heating energy. Furthermore, the battery cell can provide power for operating other components provided in the aerosol generating device. The battery cell can be a rechargeable battery or a disposable battery. The battery cell can be, but is not limited to, a lithium iron phosphate (LiFePO4) battery. For example, the battery cell can be a lithium cobalt oxide (LiCoO2) battery or a lithium titanate battery.

[0057] The circuit 7 controls the overall operation of the aerosol generating device. As shown in FIG6 , in one example, the circuit 7 includes a controller 71 , a first switching circuit 72 , a resonant circuit 73 , a detection circuit 74 , and a second switching circuit 75 .

[0058] The first switching circuit 72 can be a circuit composed of transistors, such as a half-bridge circuit composed of two transistors connected in series, and the transistors include but are not limited to IGBTs, MOS tubes, etc. The resonant circuit 73 is composed of an induction coil and a capacitor, and can be, for example, an LCC series resonant circuit. The controller 71 can control the transistors of the first switching circuit 72 to alternately turn on and off so that the resonant circuit 73 resonates, thereby causing the resonant circuit 73 to form an alternating current flowing through the induction coil during the resonance process, thereby causing the induction coil to generate an alternating magnetic field to induce heating of the first heater 3.

[0059] Furthermore, the first heater 3 includes a sensing material, which includes a metal material. The first heater 3 has the TCR characteristics of a metal material, that is, as the temperature of the first heater 3 rises, its resistance also changes accordingly. Correspondingly, the electrical parameter values ​​of the resonant circuit 73 also change accordingly. For example, as the temperature of the first heater 3 rises, its resistance increases; correspondingly, the quality factor Q of the resonant circuit 73 decreases, and the resonant voltage and resonant current decrease. Based on this characteristic, the electrical parameter values ​​of the resonant circuit 73 can be detected by the detection circuit 74 and fed back to the controller 71. The controller 71 can control the heating energy supplied to the first heater 3 based on the detected electrical parameter values, thereby controlling the heating temperature of the first heater 3, so that the first heater 3 operates according to a predetermined desired temperature curve.

[0060] The second switching circuit 75 is also a circuit composed of transistors, such as transistors electrically connected between the battery cell and the second heater 21. The controller 71 can control the transistors of the second switching circuit 75 to alternately turn on and off, thereby causing the second heater 21 to heat at a corresponding voltage. Furthermore, as previously described, the temperature of the second heater 21 is detected by the temperature detector 4 and fed back to the controller 71. Based on the detected temperature information of the second heater 21, the controller 71 can control the heating energy supplied to the second heater 21, thereby controlling the temperature of the second heater 21 so that the second heater 21 operates according to a predetermined desired temperature curve.

[0061] It should be noted that the aerosol generating system composed of the above-mentioned aerosol generating device and aerosol generating article 6 can also have other variations. For example, as shown in Figures 4 and 5, in one variation, the first heater 3 can also be built into the aerosol generating article 6, that is, disposed within the aerosol generating article 6. For example, the aerosol generating article 6 includes a filter segment and a tobacco segment, and the first heater 3 is disposed within the tobacco segment. The first heater 3 can be in the form of a sheet, granules, or a tube, etc. In this variation, the aerosol generating device does not include the first heater 3; the aerosol generating device can also not include the extractor 2. The second heater 21 extends axially along the first accommodating chamber 11, thereby surrounding at least a portion of the aerosol generating article 6 received in the first accommodating chamber 11 and heating it. The temperature detector 4 can be disposed on the outer surface of the second heater 21.

[0062] FIG7 is a schematic diagram of a temperature curve of the aerosol generating device provided in an embodiment of the present application.

[0063] As shown in FIG7 , curve A in the figure is a curve showing the relationship between the temperature of the first heater 3 and time, and curve B in the figure is a curve showing the relationship between the temperature of the second heater 21 and time.

[0064] During the time period t0 to t2, which is the preheating stage, upon detecting a puff start signal, the controller controls the first heater 3 and the second heater 21 to simultaneously start heating. The puff start signal may be a signal generated by a button, a puff sensor, or the like.

[0065] Specifically, the controller 71 controls the temperature of the first heater 3 to rapidly increase, for example, from an initial temperature T10 to a preset temperature T11, and then maintain the preset temperature T11 for a duration as shown in the insulation phase from t1 to t2 in the figure. The preset temperature T11 is between 200°C and 400°C. For example, the preset temperature T11 can be 250°C, 280°C, 300°C, 320°C, 340°C, 360°C, or 380°C, etc., to generate aerosol or to generate a satisfactory amount of aerosol to meet the user's puffing needs. In some embodiments, the preheating time can be t0 to t2, for example, a preheating time between 5s and 30s; for example, a preheating time between 5s and 20s. In other examples, the insulation phase shown in t1 to t2 may not be present.

[0066] Correspondingly, the controller 71 controls the second heater 21 to increase the temperature from the initial temperature T20 to the preset temperature T21 and then maintain the preset temperature T21. The preset temperature T21 is between 100°C and 250°C, and can be 120°C, 160°C, 180°C, 200°C, 220°C, or 240°C, etc.

[0067] During the time period t0 to t2, the controller 71 controls the total energy provided by the battery cell to the first heater 3 to be greater than the total energy provided to the second heater 21, so that the temperature of the first heater 3 rises to the preset temperature T11, and the temperature of the second heater 21 rises to the preset temperature T21, wherein the preset temperature T11 is greater than the preset temperature T21.

[0068] It is understood that the initial temperature T10 and the initial temperature T20 can be the same or different. The figure only uses the initial temperature T10 and the initial temperature T20 as an example for illustration. For example, when the first heater is activated first and the second heater is activated later, the initial temperature of the second heater will be higher than the ambient temperature due to the effect of heat transfer.

[0069] At time t2, the controller 71 outputs a prompt signal indicating that the aerosol can be inhaled, prompting the user to inhale. The prompt may be in the form of vibration, sound, light (such as a constant or flashing LED light), etc. It should be noted that the time period from t2 to t4 is the inhalation phase.

[0070] During time period t2 to t3, after the inhalable aerosol prompt signal is output, the controller 71 controls the temperature of the first heater 3 to decrease from a preset temperature T11 to a preset temperature T12 and maintain it at the preset temperature T12. The controller 71 controls the second heater 21 to maintain the preset temperature T21. The preset temperature T12 is greater than the preset temperature T21.

[0071] During time period t3-t4, the temperature of first heater 3 needs to be lowered to reduce the risk of harmful substances being generated. As shown in Figure 7 , controller 71 controls the temperature of first heater 3 to drop from preset temperature T12 to preset temperature T13 and maintain it at preset temperature T13 until the end of puffing at time t4. Controller 71 controls second heater 21 to maintain preset temperature T21. Preset temperature T13 is also greater than preset temperature T21.

[0072] As shown in Figure 7, during the entire heating cycle, i.e., time period t0 to t4, the first heater 3 performs primary heating, i.e., providing the temperature required for puffing; while the second heater 21 performs auxiliary heating, i.e., providing a temperature lower than that required for puffing. During the entire heating period, neither the first heater 3 nor the second heater 21 switches between primary and auxiliary heating; in other words, the first heater 3 does not switch from primary to auxiliary heating, nor does the second heater 21 switch from auxiliary to primary heating. The auxiliary heating provided by the second heater 21 not only achieves uniform heating of the product, improving the baking efficiency, but also supplements the aerosol release while the first heater 3 is heating the product.

[0073] FIG8 is another schematic diagram of a temperature curve of the aerosol generating device provided in an embodiment of the present application.

[0074] Different from the example in Figure 7, during the time period t3 to t4, the controller 71 controls the temperature of the first heater 3 to decrease in a step-by-step manner. Specifically, the temperature of the first heater 3 first decreases from the preset temperature T12 to the preset temperature T13 and is maintained at the preset temperature T13 (as shown in the time period t3 to t31 in the figure); the temperature of the first heater 3 then decreases from the preset temperature T13 to the preset temperature T14 and is maintained at the preset temperature T14 (as shown in the time period t31 to t32 in the figure); then the temperature of the first heater 3 decreases from the preset temperature T14 to the preset temperature T15 and is maintained at the preset temperature T15 until the end of the puffing at t4 (as shown in the time period t32 to t4 in the figure). In other words, the temperature of the first heater 3 is controlled to decrease in a step-by-step manner. In this way, the risk of harmful substances being generated can be further reduced, and the problem of the temperature of the first heater 3 dropping too much, resulting in a sudden decrease in the amount of aerosol released, can be avoided.

[0075] FIG9 is another schematic diagram of a temperature curve of the aerosol generating device provided in an embodiment of the present application.

[0076] Unlike the example in FIG8 , during the time period t3 to t4, the controller 71 controls the temperature of the second heater 21 to increase in a stepwise manner corresponding to the temperature of the first heater 3. Specifically, when the temperature of the first heater 3 decreases from the preset temperature T12 to the preset temperature T13 and is maintained at the preset temperature T13, the temperature of the second heater 21 is controlled to increase from the preset temperature T21 to the preset temperature T22 and is maintained at the preset temperature T22 (shown in the time period t3 to t31 in the figure); when the temperature of the first heater 3 decreases from the preset temperature T13 to the preset temperature T14 and is maintained at the preset temperature T14, the temperature of the second heater 21 is controlled to increase from the preset temperature T22 to the preset temperature T23 and is maintained at the preset temperature T23 (shown in the time period t31 to t32 in the figure); and when the temperature of the first heater 3 decreases from the preset temperature T14 to the preset temperature T15 and is maintained at the preset temperature T15, the temperature of the second heater 21 is controlled to increase from the preset temperature T23 to the preset temperature T24 and is maintained at the preset temperature T24 (shown in the time period t32 to t4 in the figure). In this manner, by increasing the temperature of the second heater 21 , the amount of aerosol released can be increased and the aerosol can be released smoothly.

[0077] FIG10 is another schematic diagram of a temperature curve of the aerosol generating device provided in an embodiment of the present application.

[0078] Unlike the example in FIG9 , when the puff-initiating signal is detected, the first heater 3 activates heating before the second heater 21. The second heater 21 activates heating at time t2, i.e., when the controller 71 outputs the aerosol-ready prompt signal. Of course, the activation time of the second heater 21 can be later than time t2, or between times t0 and t2.

[0079] FIG11 is another schematic diagram of a temperature curve of the aerosol generating device provided in an embodiment of the present application.

[0080] Unlike the example in FIG7 , during time period t3 to t4, the temperature of the second heater 21 first increases in a stepwise manner and then decreases in a stepwise manner. Specifically, during time period t3 to t31, the temperature of the second heater 21 increases from a preset temperature T21 to a preset temperature T22 and is maintained at the preset temperature T22. During time period t31 to t32, the temperature of the second heater 21 first increases from a preset temperature T23 to a preset temperature T24 and is maintained at the preset temperature T24. The temperature of the second heater 21 then increases from the preset temperature T24 to a preset temperature T25 and is maintained at the preset temperature T25. The temperature of the second heater 21 then decreases from the preset temperature T25 to a preset temperature T26 and is maintained at the preset temperature T26. Finally, the temperature of the second heater 21 decreases from the preset temperature T26 to a preset temperature T27 and is maintained at the preset temperature T27.

[0081] As can be seen above, during the time period t3 to t31, the temperature of the second heater 21 increases or decreases in a single step; while during the time period t31 to t32, the temperature of the second heater 21 increases or decreases in two steps. In some examples, a multi-step increase or decrease can be configured. In other examples, the temperature of the second heater 21 can first decrease in steps and then increase in steps.

[0082] With such an arrangement, the amount of aerosol released can be supplemented more flexibly during the heating of the product by the first heater 3 , thereby releasing the aerosol smoothly throughout the entire puffing stage, thereby improving the user's puffing experience.

[0083] It should be understood that the temperature curves shown in Figures 7-11 are ideal curves and may differ in actual operation. For example, during time period t3-t4, the temperature of the first heater 3 or the second heater 21 does not change linearly over time, but may fluctuate. For example, due to the control method, the actual temperature curve of the test may fluctuate depending on a certain sampling frequency. Alternatively, the temperature samples can be smoothed using conventional mathematical methods.

[0084] Based on the above configuration, in one example, the controller is configured to control the heating energy supplied by the battery cell to the first heater and the second heater so that the temperature of the first heater is greater than the temperature of the second heater throughout the entire heating cycle.

[0085] In some embodiments, the temperature of the first heater is 1.5-2.5 times, for example, 2 times, the temperature of the second heater, which is adjusted according to the specific characteristics of the aerosol-generating article.

[0086] The target temperature is the preset temperature that the heater reaches when the controller controls the heating energy supplied to the battery cell. For example, FIG7 illustrates the preset temperatures corresponding to different stages.

[0087] During the time period t2 to t4, i.e., the puffing phase, the primary heating target temperature or the auxiliary heating target temperature can have multiple values. For example, in Figure 9 , the first heater 3 used for primary heating has multiple different target temperatures T12, T13, T14, and T15 during the time period t2 to t4; while the second heater 21 used for auxiliary heating also has multiple different target temperatures T21, T22, T23, and T24 during the time period t2 to t4.

[0088] In this example, the first heater or the second heater does not switch between the primary heating and the auxiliary heating. For example, during the time period t0 to t4, the first heater 3 is always used for primary heating, and the second heater 21 is always used for auxiliary heating.

[0089] In one example, the controller is configured to control the heating energy supplied by the battery cell to the first heater and the second heater based on the electrical parameter value of the resonant circuit detected by the detection circuit and / or the temperature information of the second heater detected by the temperature detector, so that the first heater performs main heating and the second heater performs auxiliary heating, that is, the temperature of the first heater is greater than the temperature of the second heater.

[0090] Taking Figure 9 as an example, during time period t3-t4, the first heater 3 performs primary heating, while the second heater 21 performs auxiliary heating. During time period t3-t31, for example, approximately 80-120 seconds after the puff start signal is detected (i.e., time t3), the controller controls the heating energy supplied to the first heater 3 so that the temperature of the first heater 3 begins to decrease from a preset temperature T12. Simultaneously, based on the electrical parameter values ​​of the resonant circuit 73 detected by the detection circuit 74, the controller controls the heating energy supplied to the first heater 3 so that the temperature of the first heater 3 remains at the preset temperature T13 as the temperature of the first heater 3 decreases from the preset temperature T12 to the preset temperature T13. The electrical parameter values ​​of the resonant circuit 73 include at least one of the resonant voltage, the resonant current, and the quality factor.

[0091] Similarly, the controller controls the heating energy supplied to the second heater 21 so that the temperature of the second heater 21 starts to rise from the preset temperature T21. At the same time, based on the temperature information of the second heater 21 detected by the temperature detector 4, when the temperature of the second heater 21 rises from the preset temperature T21 to the preset temperature T22, the controller controls the heating energy supplied to the second heater 21 so that the temperature of the second heater 21 is maintained at the preset temperature T22.

[0092] In a specific implementation, the controller can control the first switch circuit 72 to be alternately turned on and off, thereby controlling the heating energy supplied to the first heater 3; and control the second switch circuit 75 to be alternately turned on and off, thereby controlling the heating energy supplied to the second heater 21.

[0093] In one example, the controller is configured to control the heating energy supplied by the battery cell to the first heater during at least part of the inhalation phase, so that the first heater is first maintained at a first preset temperature and then decreases from the first preset temperature to a second preset temperature.

[0094] As shown in FIG. 7 , during the time period t2 to t4 , the controller 71 controls the first heater 3 to first maintain the preset temperature T12 , and then controls the temperature of the first heater 3 to drop from the preset temperature T12 to the preset temperature T13 .

[0095] In one example, the controller is configured to control the heating energy supplied by the battery cell to the second heater during the at least partial puffing phase so that the temperature of the second heater is maintained at a third preset temperature; the third preset temperature is lower than the second preset temperature.

[0096] As shown in FIG. 7 or FIG. 8 , during the period t2 to t4 , the controller 71 controls the second heater 21 to maintain the preset temperature T21 .

[0097] In one example, the controller is configured to, during the at least partial puffing phase, while the temperature of the first heater is maintained at the first preset temperature, control the heating energy supplied by the battery cell to the second heater so that the temperature of the second heater is maintained at a fourth preset temperature; and when the temperature of the first heater drops from the first preset temperature to the second preset temperature, control the heating energy supplied by the battery cell to the second heater so that the temperature of the second heater rises from the fourth preset temperature to a fifth preset temperature, and both the fourth preset temperature and the fifth preset temperature are lower than the second preset temperature.

[0098] As shown in FIG9 , during the time period t2 to t3, the controller 71 controls the first heater 3 to maintain the preset temperature T12, and controls the second heater 21 to maintain the preset temperature T21. During the time period t3 to t31, the temperature of the first heater 3 is controlled to decrease from the preset temperature T12 to the preset temperature T13, and the controller 71 controls the second heater 21 to increase from the preset temperature T21 to the preset temperature T22.

[0099] In one example, the controller is configured to control the heating energy supplied by the battery cell to the second heater during the at least partial puffing phase so that the temperature of the second heater first increases in a step-by-step manner and then decreases in a step-by-step manner; or to control the heating energy supplied by the battery cell to the second heater so that the temperature of the second heater first decreases in a step-by-step manner and then increases in a step-by-step manner.

[0100] As shown in FIG. 11 , during the time period t3 to t4 , the controller 71 controls the temperature of the second heater 21 to first increase in a stepwise manner and then decrease in a stepwise manner.

[0101] In some embodiments, the circuit 7 includes a memory, etc., for storing program instructions corresponding to the control method in any of the following method embodiments, thereby implementing the control method in any of the following method embodiments. The control methods provided in some embodiments of the present application are described below in conjunction with exemplary applications and implementations of the aerosol generating devices provided in the embodiments of the present application. Please refer to Figure 12, which is a schematic flow chart of the control methods provided in some embodiments of the present application. It is understood that the execution entity of the control method can be one or more controllers of the circuit.

[0102] As shown in FIG12 , the method S10 may specifically include the following steps:

[0103] S11 : controlling the heating energy supplied by the battery cell to the first heater and the second heater so that the temperature of the first heater is greater than the temperature of the second heater throughout the entire heating cycle.

[0104] In one example, based on the electrical parameter value of the resonant circuit detected by the detection circuit and / or the temperature information of the second heater detected by the temperature detector, the heating energy supplied by the battery core to the first heater and the second heater is controlled so that the temperature of the first heater is greater than the temperature of the second heater.

[0105] In one example, the first switching circuit is controlled to be alternately turned on and off, thereby controlling the heating energy supplied to the first heater; and the second switching circuit is controlled to be alternately turned on and off, thereby controlling the heating energy supplied to the second heater.

[0106] In one example, the electrical parameter value of the resonant circuit includes at least one of a resonant voltage, a resonant current, and a quality factor.

[0107] In one example, during the at least partial inhalation phase, the heating energy supplied by the battery cell to the first heater is controlled so that the first heater is first maintained at a first preset temperature and then drops from the first preset temperature to a second preset temperature.

[0108] In one example, during the at least partial puffing phase, the heating energy supplied by the battery cell to the second heater is controlled so that the temperature of the second heater is maintained at a third preset temperature; the third preset temperature is lower than the second preset temperature.

[0109] In one example, during the at least partial puffing phase, while the temperature of the first heater is maintained at the first preset temperature, the heating energy supplied by the battery cell to the second heater is controlled so that the temperature of the second heater is maintained at a fourth preset temperature; when the temperature of the first heater drops from the first preset temperature to the second preset temperature, the heating energy supplied by the battery cell to the second heater is controlled so that the temperature of the second heater rises from the fourth preset temperature to a fifth preset temperature, and both the fourth preset temperature and the fifth preset temperature are lower than the second preset temperature.

[0110] In one example, during the at least partial puffing phase, the heating energy supplied by the battery cell to the second heater is controlled so that the temperature of the second heater first increases in a step-by-step manner and then decreases in a step-by-step manner; or, the heating energy supplied by the battery cell to the second heater is controlled so that the temperature of the second heater first decreases in a step-by-step manner and then increases in a step-by-step manner.

[0111] In one example, the temperature difference between the first heater and the second heater is first increased and then decreased.

[0112] The temperature difference may be gradually reduced in a smooth and continuous manner or in a stepped manner. Alternatively, one of the first heater and the second heater may be smoothly and continuously reduced, while the other may be stepped.

[0113] In one example, the temperature difference between the first heater and the second heater reaches a maximum value at the end of the preheating stage.

[0114] In one example, the first heater is controlled to start heating before the second heater, or the first heater and the second heater are controlled to start heating at the same time.

[0115] It should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0116] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, or of course by hardware. Those skilled in the art can understand that all or part of the processes in the above embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Based on the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present application as described above. For the sake of simplicity, they are not provided in detail. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An aerosol generating device, characterized in that include: Battery cells, used to provide electricity; a first heater configured to be at least partially inserted into an interior of an aerosol-generating article for heating, and a second heater configured to surround at least a portion of the aerosol-generating article for heating; The controller is configured to control the heating energy supplied by the battery cell to the first heater and the second heater so that the temperature of the first heater is greater than the temperature of the second heater throughout the entire heating cycle.

2. The aerosol generating device according to claim 1, wherein The device further comprises a magnetic field generator for generating a changing magnetic field; and a capacitor forming a resonant circuit together with the magnetic field generator. A detection circuit, used to detect an electrical parameter value of the resonant circuit; and a temperature detector for detecting temperature information of the second heater; The first heater is configured to generate heat when penetrated by a changing magnetic field; The controller is configured to control the heating energy supplied by the battery cell to the first heater and the second heater based on the electrical parameter value of the resonant circuit detected by the detection circuit and / or the temperature information of the second heater detected by the temperature detector, so that the temperature of the first heater is greater than the temperature of the second heater.

3. The aerosol generating device according to claim 2, wherein: Also includes a first switching circuit and a second switching circuit; The controller is configured to control the first switching circuit to be alternately turned on and off, thereby controlling the heating energy supplied to the first heater; and control the second switching circuit to be alternately turned on and off, thereby controlling the heating energy supplied to the second heater.

4. The aerosol generating device according to claim 2, wherein: The electrical parameter value of the resonant circuit includes at least one of a resonant voltage, a resonant current, and a quality factor.

5. The aerosol generating device according to claim 1, wherein: The controller is configured to control the heating energy supplied by the battery cell to the first heater during at least part of the inhalation phase, so that the first heater is first maintained at a first preset temperature and then decreases from the first preset temperature to a second preset temperature.

6. The aerosol generating device according to claim 5, characterized in that The controller is configured to control the heating energy supplied by the battery cell to the second heater during the at least partial puffing phase so that the temperature of the second heater is maintained at a third preset temperature; the third preset temperature is lower than the second preset temperature.

7. The aerosol generating device according to claim 5, characterized in that The controller is configured to, during the at least partial puffing phase, while the temperature of the first heater is maintained at the first preset temperature, control the heating energy supplied by the battery cell to the second heater so that the temperature of the second heater is maintained at a fourth preset temperature; and when the temperature of the first heater drops from the first preset temperature to the second preset temperature, control the heating energy supplied by the battery cell to the second heater so that the temperature of the second heater rises from the fourth preset temperature to a fifth preset temperature, wherein both the fourth preset temperature and the fifth preset temperature are lower than the second preset temperature.

8. The aerosol generating device according to claim 5, wherein: The controller is configured to control the heating energy supplied by the battery cell to the second heater during the at least partial puffing phase so that the temperature of the second heater first increases in steps and then decreases in steps; or to control the heating energy supplied by the battery cell to the second heater so that the temperature of the second heater first decreases in steps and then increases in steps.

9. The aerosol generating device according to claim 1, wherein: The controller is configured to cause the temperature difference between the first heater and the second heater to first increase and then decrease.

10. The aerosol generating device according to claim 9, characterized in that The controller is configured to make the temperature difference between the first heater and the second heater reach a maximum value at the end of the preheating stage.

11. The aerosol generating device according to claim 1, wherein The controller is configured to control the first heater to start heating before the second heater, or to control the first heater and the second heater to start heating at the same time.

12. The aerosol generating device according to claim 1, wherein The first heater and the second heater at least partially overlap in an axial direction of the aerosol-generating article.

13. An aerosol generating system comprising an aerosol generating device and an aerosol generating article; characterized in that: The aerosol-generating article has a first heater disposed therein, the first heater being configured to generate heat when penetrated by a varying magnetic field; The aerosol generating device comprises: Battery cells, used to provide electricity; A magnetic field generator, used to generate a changing magnetic field; a second heater configured to heat around at least a portion of the aerosol-generating article; The controller is configured to control the heating energy supplied by the battery cell to the first heater and the second heater so that the temperature of the first heater is greater than the temperature of the second heater throughout the entire heating cycle.

14. A method for controlling an aerosol generating device, characterized in that: The aerosol generating device comprises: Battery cells, used to provide electricity; a first heater configured to be at least partially inserted into an interior of an aerosol-generating article for heating, and a second heater configured to surround at least a portion of the aerosol-generating article for heating; The control method includes: The heating energy supplied by the battery cell to the first heater and the second heater is controlled so that the temperature of the first heater is greater than the temperature of the second heater throughout the entire heating cycle.

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