Control method and aerosol generating device

Abstract

A control method and an aerosol generating device. The control method (S100) comprises: when receiving a heating starting instruction, on the basis of mapping relationships between time periods and energy parameters, respectively controlling, within a plurality of time periods, a power supply to provide corresponding energy for an induction coil, wherein the energy provided in each time period is composed of a plurality of high-frequency drive pluses, and the duration of the time period is greater than or equal to 500 ms (S10). Compared with conventional control modes depending on the real-time temperature of a heater and a temperature curve, the present control mode involves control of energy supply in different time periods; thus, the taste and vaping experience can be improved, dependence on temperature measurement devices can be eliminated, and hardware costs can be effectively reduced.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202310942740.6, entitled "CONTROL METHOD AND AEROSOL GENERATING DEVICE" filed with the China National Intellectual Property Administration on July 28, 2023, which is incorporated by reference in its entirety.TECHNICAL FIELD

[0002] Embodiments of this application relate to the field of electronic atomization technologies, and in particular, to a control method and an aerosol generating device.BACKGROUND

[0003] An aerosol generating device heats and bakes an aerosol generating substrate by using a heater, to generate an aerosol for a user to use. Generally, in the existing aerosol generating device, a temperature of the heater is adjusted by changing power outputted by a power supply, and the temperature of the heater is controlled based on a preset temperature curve.

[0004] In some solutions known by the inventor of this application, a real-time temperature of the heater is collected through a temperature sensor, and the power is regulated based on a deviation between the real-time temperature and an ideal temperature on a temperature curve, so that the temperature of the heater conforms to the ideal temperature on the temperature curve. However, this manner depends on accuracy of the temperature sensor and reasonableness of the temperature curve.SUMMARY

[0005] Some embodiments of this application provide a control method applied to an aerosol generating device, to provide energy in time periods based on an energy requirement in a process of baking an aerosol generating substrate, thereby improving taste and inhalation experience.

[0006] According to a first aspect, some embodiments of this application provide a control method, applied to an aerosol generating device, the aerosol generating device including an induction heater assembly and a power supply, the induction heater assembly including an induction coil configured to generate a changing magnetic field when a changing current flows and a sensor configured to be penetrated by the changing magnetic field generated by the induction coil to generate heat, to heat an aerosol generating substrate to generate an aerosol, and the power supply being configured to provide energy to the induction heater assembly.

[0007] The method includes: controlling, after receiving a heating initiation instruction, the power supply to provide corresponding energy to the induction coil respectively within a plurality of time periods based on a mapping relationship between a time period and an energy parameter, where the energy provided in the time period includes a plurality of high-frequency driving pulses, and a duration of the time period is greater than or equal to 500 ms.

[0008] In some embodiments, the controlling the power supply to provide corresponding energy to the induction coil respectively within a plurality of time periods includes: controlling, within a current time period, the power supply to continuously output the plurality of high-frequency driving pulses, to provide the energy to the induction coil; and controlling, if the provided energy reaches set energy of the current time period, the power supply to stop energy supply of the current time period for a period of time.

[0009] In some embodiments, the controlling the power supply to provide corresponding energy to the induction coil respectively within a plurality of time periods includes: controlling, within a current time period, the power supply to continuously output the plurality of high-frequency driving pulses, to provide the energy to the induction coil; and controlling, if a total output duration of the high-frequency driving pulses reaches a preset output duration of the current time period, the power supply to stop energy supply of the current time period for a period of time.

[0010] In some embodiments, the method further includes: determining a duration for which the power supply stops the energy supply of the current time period; and if the duration satisfies a preset deadline threshold of the current time period, ending the current time period, and controlling the power supply to activate the induction coil to output energy supply of a next time period.

[0011] In some embodiments, the method further includes: if a sum of a duration for which the power supply continuously outputs the plurality of high-frequency driving pulses and a duration for which the power supply stops the energy supply of the current time period satisfies a duration of a preset time period, ending the current time period, and controlling the power supply to activate the induction coil to output energy supply of a next time period.

[0012] In some embodiments, the aerosol generating device further includes a temperature sensor configured to determine a temperature of the sensor, and the method further includes: obtaining a real-time temperature of the sensor that is measured by the temperature sensor; and if the real-time temperature is less than or equal to a preset low-temperature threshold, ending the current time period, and controlling the power supply to activate the induction coil to output energy supply of a next time period.

[0013] In some embodiments, the method further includes: obtaining a resonance voltage of the induction coil; and if the resonance voltage is less than or equal to a preset low-pressure threshold, ending the current time period, and controlling the power supply to activate the induction coil to output energy supply of a next time period.

[0014] In some embodiments, the controlling, after receiving a heating initiation instruction, the power supply to provide corresponding energy to the induction coil respectively within a plurality of time periods based on a mapping relationship between a time period and an energy parameter includes: entering a heat-up stage after receiving the heating initiation instruction, the heat-up stage including a first time period; and controlling, based on a mapping relationship between the first time period and the energy parameter, the power supply to provide the corresponding energy to the induction coil at a maximum power within the first time period.

[0015] In some embodiments, the controlling, after receiving a heating initiation instruction, the power supply to provide corresponding energy to the induction coil respectively within a plurality of time periods based on a mapping relationship between a time period and an energy parameter includes: entering a heat insulation stage after receiving the heating initiation instruction, the heat insulation stage including a plurality of second time periods; and controlling, based on a mapping relationship between the second time period and the energy parameter, the power supply to provide the corresponding energy to the induction coil respectively within the plurality of second time periods.

[0016] In some embodiments, durations of the second time periods are the same, or durations of at least two of the second time periods are different.

[0017] In some embodiments, set energy of the plurality of second time periods is the same, or set energy of at least two of the second time periods is different.

[0018] In some embodiments, a duration range of the second time period ranges from 1s to 2s.

[0019] In some embodiments, the controlling, after receiving a heating initiation instruction, the power supply to provide corresponding energy to the induction coil respectively within a plurality of time periods based on a mapping relationship between a time period and an energy parameter includes: entering an inhalation stage after receiving the heating initiation instruction, the inhalation stage including a plurality of third time periods; and controlling, based on a mapping relationship between the third time period and the energy parameter, the power supply to provide the corresponding energy to the induction coil respectively within the plurality of third time periods.

[0020] In some embodiments, durations of the third time periods are the same, or durations of at least two of the third time periods are different.

[0021] In some embodiments, set energy of the plurality of third time periods is the same, or set energy of at least two of the third time periods is different.

[0022] In some embodiments, a duration range of the third time period is greater than 10s.

[0023] In some embodiments, energy corresponding to at least one third time period located at an early inhalation stage is greater than energy corresponding to at least one third time period located at a late inhalation stage.

[0024] In some embodiments, at the inhalation stage, a temperature difference between a highest temperature of the real-time temperature of the sensor and a lowest temperature of the real-time temperature of the sensor ranges from 10 °C to 50 °C.

[0025] In some embodiments, a real-time temperature of the sensor gradually increases, and then gradually decreases within a single time period.

[0026] In some embodiments, a resonance voltage of the induction coil is obtained, where the resonance voltage of the induction coil gradually increases, and then gradually decreases within a single time period.

[0027] In some embodiments, a resonance voltage of the induction coil is obtained; and alarm information is outputted if the resonance voltage is greater than a preset voltage threshold.

[0028] According to a second aspect, some embodiments of this application provide an aerosol generating device, including: an induction heater assembly, including an induction coil and a sensor, the induction coil being configured to generate a changing magnetic field when a changing current flows, and the sensor being configured to be penetrated by the changing magnetic field generated by the induction coil to generate heat, to heat an aerosol generating substrate to generate an aerosol; a power supply, configured to provide energy to the induction heater assembly; and a controller, the controller being connected to the induction heater assembly and the power supply and being configured to perform the control method according to the first aspect.

[0029] In some embodiments, a circuit in which the induction coil is located includes a resonance circuit and a half-wave rectification circuit, the resonance circuit includes an induction coil and a capacitor that are connected in series, and the half-wave rectification circuit is connected to the capacitor and is configured to perform half-wave rectification on a voltage signal of the capacitor, to output a resonance voltage of the induction coil.

[0030] Embodiments of this application provide a control method, applied to an aerosol generating device, the aerosol generating device including an induction heater assembly and a power supply, the induction heater assembly including an induction coil configured to generate a changing magnetic field when a changing current flows and a sensor configured to be penetrated by the changing magnetic field generated by the induction coil to generate heat, to heat an aerosol generating substrate to generate an aerosol, and the power supply being configured to provide energy to the induction heater assembly. The control method includes: after receiving a heating initiation instruction, controlling, based on a mapping relationship between each of several time periods and set energy, the power supply to provide energy to the induction coil in time periods, where the set energy includes a plurality of high-frequency driving pulses.

[0031] In this embodiment, based on an energy requirement feature in a process of baking an aerosol generating substrate, the entire baking process is divided into a plurality of time periods, and a plurality of high-frequency driving pulses corresponding to each time period is set for each time period, so that the aerosol generating substrate receives, in time periods, heat outputted by the sensor. Therefore, the baked aerosol can rapidly reach an inhalable state and maintain the inhalable state. Compared with a conventional control manner depending on a real-time temperature and a temperature curve of a heater, in this control manner, based on an energy requirement feature in a process of baking an aerosol generating substrate, set energy in each time period adapts to the feature of the baking process, and energy supply is controlled in time periods, so that the aerosol having good taste can be generated, and a quantity of aerosols can be maintained in the inhalable state, thereby improving taste and inhalation experience. In addition, the energy supply is controlled in time periods, so that dependency on a temperature measurement device can be eliminated, thereby avoiding a problem of insufficient or excessive heat absorption of the aerosol generating substrate caused by inaccurate temperature measurement. In addition, hardware costs can be effectively reduced.BRIEF DESCRIPTION OF THE DRAWINGS

[0032] One or more embodiments are exemplarily described with reference to the corresponding figures in the accompanying drawings, and the descriptions do not constitute a limitation to the embodiments. Components in the accompanying drawings that have same reference numerals are represented as similar components, and unless otherwise particularly stated, the figures in the accompanying drawings are not drawn to scale. FIG. 1 is a schematic diagram of inserting an aerosol generating product into an aerosol generating device according to some embodiments of this application; FIG. 2 is a schematic structural diagram of an aerosol generating device according to some embodiments of this application; FIG. 3 is a schematic structural diagram of an aerosol generating product according to some embodiments of this application; FIG. 4 is a schematic diagram of an operating principle of an induction heater assembly according to some embodiments of this application; FIG. 5 is a schematic diagram of a high-frequency driving pulse of a voltage according to some embodiments of this application; FIG. 6 is a schematic structural diagram of an induction heater assembly according to some embodiments of this application; FIG. 7 is a schematic flowchart of a control method according to some embodiments of this application; FIG. 8 is a schematic diagram of a comparison between a temperature change of a sensor and a voltage with a high-frequency driving pulse according to some embodiments of this application; FIG. 9 is a schematic diagram of a relationship between a voltage Ufb and a temperature of a sensor according to some embodiments of this application; and FIG. 10 is a schematic structural diagram of a circuit in which an induction coil is located according to some embodiments of this application. DETAILED DESCRIPTION

[0033] This application is described in detail below with reference to specific embodiments. The following embodiments help a person skilled in the art to further understand this application, but do not limit this application in any form. It should be noted that, a person of ordinary skill in the art may make various changes and improvements without departing from the concept of this application. These all fall within the protection scope of this application.

[0034] To make the objectives, technical solutions, and advantages of this application clearer, this application is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that, the specific embodiments described herein are merely used for explaining this application, but are not intended to limit this application.

[0035] It should be noted that, if no conflict occurs, features in the embodiments of this application may be combined with each other, and all fall within the protection scope of this application. In addition, although functional modules are divided in the schematic diagram of the device, and a logic sequence is shown in the flowchart, in some cases, the shown or described steps may be performed in a module division different from that in the apparatus, or in a sequence different from that in the flowchart. In addition, the terms such as "first", "second", and "third" used in this specification do not limit data and an execution order, and only distinguish same items or similar items having basically same functions and effects.

[0036] Unless otherwise defined, meanings of all technical and scientific terms used in this specification are the same as that usually understood by a person skilled in the technical field to which this application belongs. The terms used in this specification of this application are merely intended to describe objectives of the specific embodiments, and are not intended to limit this application. The term "and / or" used in this specification includes any or all combinations of one or more related listed items.

[0037] In addition, technical features described below in respective implementations of this application may be combined with each other provided that the technical features do not conflict with each other.

[0038] FIG. 1 and FIG. 2 show an aerosol generating device 10 according to some embodiments of this application. The aerosol generating device 10 includes a cavity 11, an induction heater assembly 12, a power supply 14, and a controller 15. The controller 15 is electrically connected to the power supply 14 and the induction heater assembly 12.

[0039] The cavity 11 is configured to receive an aerosol generating product 20. The aerosol generating product 20 may be inserted into or extracted from the cavity 11 through an opening A of the aerosol generating device 10.

[0040] As shown in FIG. 3, in some embodiments, the aerosol generating product 20 includes a filter segment 21 and a substrate material segment 22. The substrate material segment 22 includes an aerosol generating substrate. The aerosol generating substrate is a substrate that can release a volatile compound that can form an aerosol. The volatile compound may be released by heating the aerosol generating substrate. The aerosol generating substrate may be a solid-state aerosol generating substrate. Alternatively, the aerosol generating substrate may include a solid component and a liquid component.

[0041] In some embodiments, the aerosol generating substrate may include a tobacco-including material including a volatile tobacco flavor compound that is released from the substrate during heating. Alternatively, the aerosol generating substrate may include a non-tobacco material. The aerosol generating substrate may further include an aerosol former. Suitable examples of the aerosol former include glycerol and propylene glycol.

[0042] An aerosol generated by heating the substrate material segment 22 is delivered to a user through the filter segment 21, and the filter segment 21 may be a cellulose acetate filter. The filter segment 21 may be sprayed with flavoring liquid to provide aromas, or, a separate fiber coated with the flavoring liquid may be inserted into the filter segment to improve persistence of a flavor delivered to a user. The filter segment 21 may further have a spherical or cylindrical-shaped capsule, and the capsule may include content of flavoring substances.

[0043] FIG. 3 only shows components of the aerosol generating product 20 related to this embodiment. Correspondingly, a person skilled in the art related to this embodiment need to be understood that, the aerosol generating product 20 may further include common components other than the components shown in FIG. 3. For example, a cooling section is used to cool the aerosol generated by heating the substrate material segment 22, so that the user may inhale the aerosol cooled to an appropriate temperature.

[0044] The power supply 14 provides power configured to operate the aerosol generating device 10. For example, the power supply 14 may provide power to the induction heater assembly 12, and after receiving the power, the induction heater assembly 12 generates heating energy, which is power required by a display device, a sensor, a motor, and the like. In addition, the power supply 14 may provide power required for operating other components provided in the aerosol generating device 10, for example, power required for the display device, the sensor, and the motor. The power supply 14 may be a reusable battery or a disposable battery. The power supply 14 may be, but is not limited to, a lithium iron phosphate (LiFePO4) battery. For example, the power supply 14 may be a lithium cobalt oxide (LiCoO2) battery or a lithium titanate battery.

[0045] When the aerosol generating product 20 is inserted into an interior of the cavity 11, through power provided by the power supply 14, the induction coil in the induction heater assembly 12 may cause the sensor to generate heating energy, and the heating energy is transferred to the aerosol generating product 20, so that a temperature of the aerosol generating substrate in the aerosol generating product 20 is increased, to generate the aerosol. The generated aerosol is transferred through the filter segment 21 of the aerosol generating product 20 to the user for inhalation.

[0046] The induction heater assembly 12 is configured to heat the aerosol generating substrate in the aerosol generating product 20, to generate an inhalable aerosol. The induction heater assembly 12 includes an induction coil 121 and a sensor 122. When a changing current flows through the induction coil 121, the induction coil 121 generates a changing magnetic field. When the changing magnetic field penetrates the sensor 122, the sensor 122 heats up, thereby heating the aerosol generating substrate to generate the aerosol.

[0047] In some embodiments, referring to FIG. 4, the induction coil 121 includes a resonance circuit, and the resonance circuit includes an induction coil and a capacitor that are connected in series and two switches (K1 and K2). Specifically, a heating principle of the induction heater assembly is that a capacitor C and an induction coil L form an LC oscillator, and because the switches K1 and K2 are alternately turned on, a direct current voltage of the power supply is provided to the LC oscillator in a high-frequency driving pulse manner. As shown in FIG. 5, FIG. 5 is a schematic diagram of a high-frequency driving pulse of a voltage. The LC oscillator generates inverse vibration through alternate energy storage and discharging of the capacitor C, to form an alternating current flowing through the induction coil L, so that the induction coil L generates an alternating magnetic field. The sensor 122 is induced to generate eddy current heating in the alternating magnetic field.

[0048] Referring to (a) in FIG. 6 and (b) in FIG. 6, in some embodiments, the induction coil is disposed on an outer surface of a tubular base body. The tubular base body is a tubular component that is along an axis of the cavity and surrounds the cavity. In some embodiments, the tubular base body may be a tubular component made of a thermal insulation material.

[0049] It may be understood that, the sensor 122 is made of a metal material. The sensor 122 may include a metal or carbon. In an embodiment, the sensor 122 may include a ferromagnetic material, such as ferrite, ferromagnetic steel, or stainless steel. In an embodiment, the sensor 122 includes a nickel-iron alloy. In an embodiment, the sensor 122 includes 400-series stainless steel, and the 400-series stainless steel includes 410-grade stainless steel, 420-grade stainless steel, or 430-grade stainless steel. In an embodiment, the sensor 122 includes graphite or a graphite alloy. Therefore, the sensor 122 can generate heat in the changing magnetic field generated by the induction coil, to convert the electric energy into thermal energy. A shape of the sensor 122 may be set by a person skilled in the art. Referring to (a) in FIG. 6, in some embodiments, the sensor 122 is tubular, and may be used as an inner wall of the cavity 11. When the aerosol generating product 20 is inserted into the cavity 11, an inner wall of the sensor 122 is close to or in contact with an outer periphery of the aerosol generating product 20. Therefore, when the sensor 122 generates heat, the heat can be effectively transferred to the aerosol generating product 20, to bake the aerosol generating substrate.

[0050] Referring to (b) in FIG. 6, in some embodiments, the sensor 122 is in the shape of a slice, a needle, or a pin, and is disposed in the cavity. When the aerosol generating product is inserted into the cavity, the sensor 122 penetrates into an interior of the aerosol generating product 20, and is in contact with the aerosol generating substrate. Therefore, when the sensor 122 generates heat, the heat can be effectively transferred to the aerosol generating product 20, to bake the aerosol generating substrate.

[0051] In some embodiments, a metal sheet or a metal pin is disposed in the aerosol generating product 20. When the aerosol generating product 20 is inserted into the cavity 11, the metal sheet or the metal pin disposed in the aerosol generating product 20 is used as the sensor 122, and generates heat under an effect of the changing magnetic field generated by the induction coil 121, to bake the aerosol generating substrate. It may be understood that, in this embodiment, the sensor 122 is disposable and is discarded after the aerosol generating product 20 is used.

[0052] In some embodiments, the sensor 122 is disposed on an upstream of an air inlet channel, and is not in direct contact with the aerosol generating substrate. When the sensor 122 generates heat, the heat can be effectively transferred to the air, to heat the air, and then the heated air enters the aerosol generating product 20, to bake the aerosol generating substrate.

[0053] The controller 15 may control operations of the entire aerosol generating device 10. Specifically, the controller 15 controls operations of the power supply 14 and the induction heater assembly 12, and may further control operations of other components. In some embodiments, the controller 15 includes a memory configured to store program instructions corresponding to the control method in any one of the following method embodiments, and further includes a monitoring circuit or a timer configured to monitor a power-on time, a measurement circuit or a temperature sensor configured to measure a temperature, and the like. Therefore, through the control method in any one of the following method embodiments, energy supply is controlled in time periods, to generate an aerosol having a good taste, and a volume of the aerosol can be maintained in an inhalable state, thereby improving taste and inhalation experience. In addition, dependency on a temperature measurement device is eliminated, thereby avoiding a problem of insufficient or excessive heat absorption of the aerosol generating substrate caused by inaccurate temperature measurement, and further effectively reducing hardware costs.

[0054] The control methods provided in some embodiments of this application are described below with reference to exemplary applications and implementations of the aerosol generating device provided in the embodiments of this application. Referring to FIG. 7, FIG. 7 is a schematic flowchart of a control method according to some embodiments of this application. It may be understood that, the control method may be executed by one or more controllers.

[0055] As shown in FIG. 7, a control method S100 includes the following steps.

[0056] S10: Control, after receiving a heating initiation instruction, a power supply to provide corresponding energy to an induction coil respectively within a plurality of time periods based on a mapping relationship between a time period and an energy parameter, where the energy provided in the time period includes a plurality of high-frequency driving pulses, and a duration of the time period is greater than or equal to 500 ms.

[0057] The mapping relationship includes a one-to-one correspondence between each of the several time periods and the energy parameter. The several time periods are distributed at a baking stage of an aerosol generating product, that is, a time period from starting baking the aerosol generating substrate to the aerosol generating substrate being consumed or almost consumed. In other words, an entire baking process (a service life) of the aerosol generating product is divided into a plurality of time periods, and each time period corresponds to an energy parameter. In some embodiments, the energy parameter includes a parameter that can represent energy, such as set energy, a quantity of high-frequency driving pulses, or a continuous output duration of the high-frequency driving pulse.

[0058] Based on the foregoing heating principle of the induction heater assembly, it can be learned that the induction heater assembly first converts electric energy of the power supply into magnetic field energy, and then converts the magnetic field energy into heating energy. In other words, the heating energy is provided and obtained by converting a direct current voltage of the power supply in a high-frequency driving pulse manner.

[0059] The energy parameter in each time period is determined based on an energy requirement feature in a process of baking the aerosol generating substrate. In some embodiments, the energy parameter may be an experimental value or may be an empirical value obtained based on a large quantity of tests and experiments of the applicant with reference to a specific material or the like of the aerosol generating substrate after a device mounting design of the aerosol generating device is completed. It may be understood that, an example in which the energy parameter is the set energy is used. The set energy may be adjusted based on a heat insulation performance of the induction heater assembly, or may be adjusted based on a heat transfer rate between the aerosol generating substrate and the sensor, or the like.

[0060] It may be understood that, in some embodiments, the mapping relationship may be prestored in a memory of the aerosol generating device for the controller to invoke. In some embodiments, the mapping relationship is stored in an external device that is in communication connection with the aerosol generating device, for example, a cloud server, a charging box memory, or a memory of the aerosol generating device that is in connection with the cloud server. The controller may invoke, in an operating process, the mapping relationship from an external memory or a server.

[0061] Therefore, after receiving the heating initiation instruction, the controller invokes the mapping relationship, and controls, based on each of the several time periods and the energy parameter that are in a one-to-one correspondence, the power supply to provide energy to the induction coil in time periods.

[0062] The heating initiation instruction may be a signal generated by a user operating an input component, or may be a signal obtained by depending on a detection signal of the sensor. For example, a trigger signal indicating that the aerosol generating product 20 is inserted into the aerosol generating device 10 in position is detected through a pressure sensor, an electrical parameter sensor, or the like, or a signal activated through inhalation of the user is detected through a gas flow sensor.

[0063] It may be understood that, a plurality of time periods may be distributed at an entire operating stage of a heat-up stage, a heat insulation stage, and an inhalation stage of the aerosol generating device 10, may be distributed only at the heat insulation stage, or may be distributed only at the inhalation stage.

[0064] The heat-up stage refers to a period of time in which the aerosol generating device starts to generate heat after being activated. At the heat-up stage, the aerosol generating device needs to rapidly increase a temperature of the aerosol generating substrate, to reach a pre-heat temperature at which a satisfied amount of the aerosol generating substrate is generated. The heat insulation stage refers to a period of time in which a pre-heat temperature or a temperature slightly lower than the pre-heat temperature needs to be maintained, and the aerosol may be generated at this stage, but is usually unlikely to be inhaled out of the aerosol generating device by the user. The inhalation stage refers to a stage in which the aerosol may be generated at a satisfied rate by the aerosol generating device and inhaled by the user.

[0065] In some embodiments, the controller controls the power supply to supply energy to the induction heater assembly based on the mapping relationship, and energy supply in a single time period is performed based on a preset energy parameter corresponding to this time period.

[0066] In this embodiment, based on an energy requirement feature in a process of baking an aerosol generating substrate, the entire baking process is divided into a plurality of time periods, and a plurality of high-frequency driving pulses (namely, the set energy) corresponding to each time period is set for each time period, so that the aerosol generating substrate receives, in time periods, heat outputted and transferred by the induction heater assembly. Therefore, the baked aerosol can rapidly reach an inhalable state and maintain the inhalable state. Compared with a conventional control manner depending on a real-time temperature and a temperature curve of a heater, in this control manner, based on an energy requirement feature in a process of baking an aerosol generating substrate, energy provided in each time period adapts to the feature of the baking process, and energy supply is controlled in time periods, so that the aerosol having good taste can be generated, and a quantity of aerosols can be maintained in the inhalable state, thereby improving taste and inhalation experience. In addition, the energy supply is controlled in time periods, so that dependency on a temperature measurement device can be eliminated, thereby avoiding a problem of insufficient or excessive heat absorption of the aerosol generating substrate caused by inaccurate temperature measurement. In addition, the foregoing control manner can further effectively reduce hardware costs.

[0067] In some embodiments, step S10 specifically includes the following steps.

[0068] S11: Enter a heat-up stage after receiving the heating initiation instruction, the heat-up stage including a first time period.

[0069] S12: Control, based on a mapping relationship between the first time period and the energy parameter, the power supply to provide the corresponding energy to the induction coil at a maximum power within the first time period.

[0070] Referring to FIG. 8, at the heat-up stage, a heat requirement is to enable the induction heater assembly to rapidly reach the pre-heat temperature Tmax, to improve a heat transfer rate between the induction heater assembly and the aerosol generating substrate, thereby improving the heat transfer rate.

[0071] In this embodiment, the heat-up stage corresponds to the first time period in the foregoing mapping relationship. For example, the first time period may be a first time period in the mapping relationship. It may be understood that, the first time period corresponds to the energy parameter, and the energy parameter can reflect energy that needs to be provided in the first time period. Energy reflected by the energy parameter enables the sensor to reach the pre-heat temperature Tmax.

[0072] In some embodiments, to shorten a time for reaching the pre-heat temperature and increase a heat-up rate, the power supply is controlled to provide, at the maximum power, the energy reflected by the energy parameter corresponding to the first time period to the induction coil. For example, if the maximum power is 20W, and the energy corresponding to the first time period is 160J, the power supply is controlled to perform continuous output for 8s at the maximum power 20W, and after the energy reaches 160J, output in the first time period is stopped. It may be understood that, in some embodiments, as shown in FIG. 8, output is continuously performed at the maximum power within a time period (t0 to t1), and after the temperature reaches Tmax, the temperature decreases due to natural cooling, and transitions to a subsequent heat insulation stage.

[0073] In this embodiment, at the heat-up stage, the power supply is controlled to output the energy needed in the first time period at the maximum power, so that a heat-up rate can be increased, thereby enabling the sensor to rapidly reach the pre-heat temperature, which is beneficial to improving the subsequent heat transfer rate.

[0074] In some embodiments, step S10 further specifically includes the following steps.

[0075] S13: Enter a heat insulation stage after the heating initiation instruction is received, the heat insulation stage including a plurality of second time periods, and control, based on a mapping relationship between the second time period and the energy parameter, the power supply to provide the corresponding energy to the induction coil respectively within the plurality of second time periods.

[0076] The heat insulation stage refers to the period of time in which the pre-heat temperature or the temperature slightly lower than the pre-heat temperature needs to be maintained, and the aerosol is continuously generated at this stage. It may be understood that, at the heat insulation stage, a heat-up requirement is to maintain heat transfer between the aerosol generating substrate and the heater, so that the aerosol generating substrate can continue to absorb heat from the induction heater assembly for a period of time (for example, 5s to 8s), to generate the aerosol.

[0077] In this embodiment, referring to FIG. 8 again, a duration of the heat insulation stage is divided into the plurality of second time periods. In other words, the heat insulation stage corresponds to the plurality of second time periods in the foregoing mapping relationship. For example, a total duration (t2 to t3) of a single second time period ranges from 5s to 8s.

[0078] Each second time period corresponds to the energy parameter, and the energy parameter reflects energy provided to the second time period. It may be understood that, based on the first time period in which the sensor reaches the pre-heat temperature, the energy reflected by the energy parameter corresponding to the second time period is far less than the energy reflected by the energy parameter in the first time period, and only a heat loss of the sensor needs to be compensated for, to maintain the temperature of the sensor at the pre-heat temperature or the temperature slightly lower than the pre-heat temperature. In some embodiments, the set energy of the second time period may be 10J to 20J.

[0079] In this embodiment, the power supply is controlled to provide corresponding energy to the induction coil within each second time period based on a partial mapping relationship corresponding to the heat insulation stage, so that the aerosol generating substrate can continue to absorb heat from the induction heater assembly, to generate the needed aerosol for first inhalation.

[0080] In some embodiments, the set energy of the first time period is greater than a sum of the set energy of the plurality of second time periods.

[0081] It may be understood that, the foregoing heat-up stage and heat insulation stage constitute a pre-heat stage of the aerosol generating product. At the heat-up stage, the sensor needs to be rapidly increased from an ordinary temperature to the pre-heat temperature Tmax, and at the heat insulation stage, the sensor is maintained at a heat insulation temperature (equal to the pre-heat temperature or slightly less than the pre-heat temperature), so that there is sufficient time for heat exchange between the aerosol generating product and the sensor, to further absorb heat to generate the aerosol.

[0082] In some embodiments, the set energy of the first time period is greater than a sum of the set energy of the plurality of second time periods, that is, set energy of the heat-up stage is greater than a sum of set energy of the entire heat insulation stage. The foregoing method is beneficial to rapidly generating a sufficient and desirable aerosol by the aerosol generating substrate, and effectively avoiding a heat waste at the heat insulation stage.

[0083] In some embodiments, durations of the second time periods are the same, or durations of the second time periods are not completely the same.

[0084] Generally, the total duration (t2 to t3) of the plurality of second time periods ranges from 5s to 8s, and the durations of the second time periods may be the same or may not be completely the same. A person skilled in the art may set the duration according to an actual situation. It may be understood that, within one second time period, there are a heating period in which energy is provided and a natural cooling period in which no energy is provided. Referring to FIG. 8, a duration of any second time period is equal to a sum of the heating period t+ and the natural cooling period t-. In the heating period t+, because of the energy supply, the temperature of the sensor increases to Ta, and in the natural cooling period t-, because of a heat dissipation loss, the temperature may decrease to Tb. After the temperature decreases to Tb, the temperature is rapidly increased to Ta because of energy supply within a next second time period, and then the temperature is naturally cooled to Tb. Through this circulation, the temperature changes in a wave shape, and an average temperature can be maintained at the heat insulation temperature Tc.

[0085] In some embodiments, the duration of the second time period may be greater than or equal to 500 ms. For example, the heating period t+ is approximately 300 ms, and the natural cooling period t- is approximately 200 ms, so that the sensor can be maintained at the heat insulation temperature Tc. Based on that there is a temperature difference between the aerosol generating product and the sensor, and that heat is transferred from a high-temperature object to a low-temperature object, heat is transferred from the sensor to the aerosol generating product. After absorbing heat, the aerosol generating product bakes the aerosol generating substrate, to generate the aerosol. In some embodiments, a duration range of any second time period ranges from 1s to 2s.

[0086] A person skilled in the art may determine the duration of the second time period according to actual situations such as a heat insulation performance of the aerosol generating device and a baking feature of the aerosol generating product.

[0087] It should be noted that, a duration range of the second time period is greater than or equal to 500 ms, and the controller controls the power supply to continuously supply energy at a low frequency based on the time period. In addition, to output precise power, an output frequency of a conventional pulse-width modulation (PWM) control is approximately 100 Hz, which is a high-frequency output, and the intention of the conventional PWM control is different from the intention of this solution.

[0088] In some embodiments, the set energy of the plurality of second time periods is the same.

[0089] In some embodiments, the set energy of the plurality of second time periods is reduced at least once. It may be understood that, after the heat insulation stage ends, the inhalation stage is entered, and when the inhalation stage is entered, a transition from a heat insulation temperature to an inhalation temperature needs to be performed. In addition, as the heat insulation stage is performed, sufficient heat accumulation is already performed on the aerosol generating substrate. Therefore, little energy is provided at the late heat insulation stage, so that sufficient generation of the aerosol can also be ensured, and energy consumption can also be reduced.

[0090] In some embodiments, the energy in the second time periods is regulated in the following manner. For example, an input voltage of the induction coil is changed, a resonance frequency is adjusted by regulating a resonance capacitor, or energy is adjusted by controlling a duration of outputting the plurality of high-frequency pulses.

[0091] In some embodiments, the set energy of the plurality of second time periods may be implemented in a plurality of forms. For example, within the plurality of second time periods, the set energy decreases in a step-like manner as time changes, where a second time period covered by each step and a decrease amplitude may be adjusted according to an actual requirement. For example, within the plurality of second time periods, the set energy linearly decreases as time changes, where the energy may linearly decrease with a constant slope, or linearly decreases with a changing slope. For another example, within the plurality of second time periods, the set energy wavily changes as time changes, that is, the set energy increases or decreases as time changes.

[0092] In some embodiments, step S10 further specifically includes the following steps.

[0093] S14: Enter the inhalation stage after the heating initiation instruction is received, the inhalation stage including a plurality of third time periods, and control, based on a mapping relationship between the third time period and the energy parameter, the power supply to provide the corresponding energy to the induction coil respectively within the plurality of third time periods.

[0094] At the inhalation stage, the aerosol generating device needs to generate the aerosol at the satisfied rate when the user performs inhalation. It may be understood that, at the inhalation stage, a heating requirement is to compensate for heat loss carried away by the cold air during inhalation, so that the aerosol generating product can generate the aerosol at a sufficient rate.

[0095] In this embodiment, referring to FIG. 8 again, the inhalation stage is divided into the plurality of third time periods. In other words, the inhalation stage corresponds to a plurality of third time periods in the foregoing mapping relationship. Each third time period corresponds to the energy parameter, and the energy parameter reflects the set energy. It may be understood that, in a case that the aerosol generating product already accumulates a large amount of heat and reaches an aerosol generating state, in the third time period, a small amount of energy is needed to compensate for the heat loss. In some embodiments, the set energy reflected by the energy parameter corresponding to the third time period may be 5J to 15J.

[0096] In this embodiment, the power supply is controlled, based on a partial mapping relationship corresponding to the inhalation stage, to provide energy to the induction coil in time periods, to compensate for the heat loss carried away by the cold air during inhalation in time, so that the aerosol generating product generates an enough-to-be-inhaled aerosol.

[0097] In some embodiments, durations of the third time periods are the same, or durations of at least two of the third time periods are different.

[0098] It may be understood that, the inhalation stage includes the plurality of third time periods, and the durations of the third time periods may be the same or may not be completely the same. A person skilled in the art may set the duration according to an actual situation. It may be understood that, within one third time period, there are a heating period in which energy is provided and a natural cooling period in which no energy is provided. Still referring to FIG. 8, a duration of any third time period is equal to the sum of the heating period t+ and the natural cooling period t-. In the heating period t+, because of the energy supply, the temperature of the sensor increases to Td, and in the natural cooling period t-, because of the heat dissipation loss, the temperature may decrease to Te. After the temperature decreases to Te, the temperature is rapidly increased to Td because of energy supply within a next third time period, and then the temperature is naturally cooled to Te. Through this circulation, the temperature changes in a wave shape. In this process, an average temperature of the sensor is approximately Tf.

[0099] It may be understood that, in a case that energy provided by the energy parameter is specified, a longer duration of the third time period corresponds to a longer natural cooling period and a larger temperature drop, and a shorter duration of the third time period corresponds to a shorter natural cooling period and a smaller temperature drop.

[0100] In some embodiments, the duration of the third time period may be greater than or equal to 500 ms. For example, the heating period t+ is approximately 300 ms, and the natural cooling period t- is approximately 200 ms. Based on that there is a temperature difference between the aerosol generating product and the sensor, and that heat is transferred from a high-temperature object to a low-temperature object, heat is transferred from the sensor to the aerosol generating product, so that after the aerosol generating product absorbs the heat, the aerosol generating substrate is baked, to generate a sufficient aerosol for one inhalation.

[0101] A person skilled in the art may determine the duration of the third time period according to actual situations such as a heat insulation performance of the aerosol generating device, and a baking feature and an inhalation feature of the aerosol generating product.

[0102] It should be noted that, a duration range of the third time period is greater than or equal to 500 ms, preferably, 1s to 10s, or greater than 10s, and the controller controls the power supply to continuously supply energy at a low frequency. In addition, to output precise power, an output frequency of a conventional PWM control is approximately 100 Hz, which is a high-frequency output, and the intention of the conventional PWM control is different from the intention of this solution.

[0103] In some embodiments, energy corresponding to at least one third time period located at an early inhalation stage is greater than energy corresponding to at least one third time period located at a late inhalation stage.

[0104] It may be understood that, it is set that the energy corresponding to the at least one third time period located at the early inhalation stage is greater than energy corresponding to the at least one third time period located at the late the inhalation stage, so that the aerosol generating device can generate a sufficient aerosol at the early inhalation stage. Based on heat accumulation of the aerosol generating substrate, at the late inhalation stage, even if less set energy is provided relative to the early inhalation stage, the aerosol generating substrate is fully baked, so that inhalation and taste are not affected, and energy can be effectively saved.

[0105] In some embodiments, the energy in the third time periods is regulated in the following manner. For example, an input voltage of the induction coil is changed, a resonance frequency is adjusted by regulating a resonance capacitor, or energy may be adjusted by controlling a duration of outputting the plurality of high-frequency pulses.

[0106] In some embodiments, at the inhalation stage, a temperature difference between a highest temperature of the real-time temperature of the sensor and a lowest temperature of the real-time temperature of the sensor ranges from 10 °C to 50 °C.

[0107] It may be understood that, referring to FIG. 8 again, at the inhalation stage, the energy corresponding to the energy parameter is provided in time periods, and the natural cooling period in which no energy is provided exists within each time period, so that the temperature of the sensor changes approximately in a wave shape by using the time period as a cycle. A temperature difference range between a highest temperature and a lowest temperature in the third time period is 10 °C to 50 °C.

[0108] For example, at the inhalation stage, a difference between td and te is 50 °C, that is, the sensor floats between ± 25 °C of the average temperature tf of the sensor at the inhalation stage. For another example, at the heat insulation stage, a difference between ta and tb is 10 °C, that is, the sensor floats between ± 5 °C of the average temperature tc of the sensor.

[0109] In this embodiment, energy is supplied in time periods, the temperature of the sensor changes approximately in a wave shape by using the time period as a cycle, and a temperature difference between the highest temperature and the lowest temperature ranges from 10 °C to 50 °C, so that the aerosol generating substrate receives heat transferred in time periods, and generates an aerosol having good taste.

[0110] In some embodiments, the real-time temperature of the sensor gradually increases, and then gradually decreases within one time period.

[0111] It can be known from the foregoing descriptions that, a time period includes the heating period t+ and the natural cooling period t-. In the heating period t+, energy is provided to the induction coil in the induction heater assembly, and the real-time temperature of the sensor gradually increases. In the natural cooling period t-, no energy is provided to the induction coil in the induction heater assembly, and the real-time temperature of the sensor gradually decreases.

[0112] In some embodiments, using an example in which the energy parameter is the set energy, the controlling the power supply to provide corresponding energy to the induction coil respectively within a plurality of time periods includes the following steps.

[0113] A101: Control, within a current time period, the power supply to continuously output the plurality of high-frequency driving pulses, to provide the energy to the induction coil.

[0114] A102: Control, if the provided energy reaches set energy of the current time period, the power supply to stop energy supply of the current time period for a period of time.

[0115] It may be understood that, the current time period is any time period in the mapping relationship. After heating is started, if an accumulated heat time falls within a time period a, this time period is the current time period.

[0116] The controller invokes the energy parameter in the current time period, and the controller controls, based on the energy parameter, the power supply to continuously output the plurality of high-frequency driving pulses, to provide energy to the induction coil.

[0117] The set energy is energy reflected by the energy parameter. A process in which the controller controls the power supply to output the plurality of high-frequency driving pulses may be continuously outputting the plurality of high-frequency driving pulses without interruption, which can better compensate for heat loss of the induction heater assembly and the aerosol generating substrate.

[0118] When controlling the power supply to output the plurality of high-frequency driving pulses, the controller synchronously collects statistics on accumulated provided energy that is outputted.

[0119] If the provided energy reaches the set energy corresponding to the current time period, the power supply is controlled to stop energy supply of the current time period for a period of time.

[0120] Continuing for a period of time refers to a period from a moment at which the controller stops supplying energy to the induction heater assembly to a moment at which the current time period ends, and this is also referred to as the natural cooling period described above.

[0121] In some embodiments, if the provided energy reaches the set energy (the energy reflected by the energy parameter) corresponding to the current time period, the power supply is controlled to maintain output of small energy for a period of time. It may be understood that, the output of the small energy does not cause the temperature of the sensor to increase in the natural cooling period.

[0122] In this embodiment, statistics about whether the provided energy reaches the set energy corresponding to the current time period are collected, so that the power supply is controlled to stop energy supply of the current time period, which can precisely and rapidly provide the set energy to the current time period.

[0123] In some embodiments, using an example in which the energy parameter is a quantity of high-frequency driving pulses, the controlling the power supply to provide corresponding energy to the induction coil respectively within a plurality of time periods includes the following steps.

[0124] A103: Control, within a current time period, the power supply to continuously output the plurality of high-frequency driving pulses, to provide the energy to the induction coil.

[0125] A104: Control, if a quantity of outputted high-frequency driving pulses reaches a preset quantity of pulses of the current time period, the power supply to stop energy supply of the current time period for a period of time.

[0126] It may be understood that, the current time period is any time period in the mapping relationship. After heating is started, if an accumulated heat time falls within a time period a, this time period is the current time period.

[0127] The controller invokes the energy parameter in the current time period, and the controller controls, based on the energy parameter, the power supply to continuously output the plurality of high-frequency driving pulses, to provide energy to the induction coil.

[0128] When controlling the power supply to output the plurality of high-frequency driving pulses, the controller synchronously collects statistics on the quantity of outputted high-frequency driving pulses. Based on that each high-frequency driving pulse corresponds to specific energy, the preset quantity of pulses (specific energy) may be set. When the quantity of outputted high-frequency driving pulses reaches the preset quantity of pulses of the current time period, the power supply is controlled to stop energy supply of the current time period for a period of time.

[0129] Continuing for a period of time refers to a period from a moment at which the controller stops supplying energy to the induction heater assembly to a moment at which the current time period ends, and this is also referred to as the natural cooling period described above.

[0130] In this embodiment, statistics about whether the quantity of outputted high-frequency driving pulses reaches the preset quantity of pulses of the current time period are collected, so that the power supply is controlled to stop energy supply of the current time period, which can precisely and rapidly provide the set energy to the current time period.

[0131] In some embodiments, using an example in which the energy parameter is a total output duration of the high-frequency driving pulses, the controlling the power supply to provide corresponding energy to the induction coil respectively within a plurality of time periods includes the following steps.

[0132] A105: Control, within a current time period, the power supply to continuously output the plurality of high-frequency driving pulses, to provide the energy to the induction coil.

[0133] A106: Control, if a total output duration of the high-frequency driving pulses reaches a preset output duration of the current time period, the power supply to stop energy supply of the current time period for a period of time.

[0134] It may be understood that, the controller invokes the energy parameter in the current time period, and the controller controls, based on the energy parameter, the power supply to continuously output the plurality of high-frequency driving pulses, to provide energy to the induction coil.

[0135] When controlling the power supply to output the plurality of high-frequency driving pulses, the controller synchronously collects statistics on the total output duration of the high-frequency driving pulses. Based on that each high-frequency driving pulse corresponds to specific energy, output frequencies of the high-frequency driving pulses are consistent, so that the preset output duration can be set (a quantity of high-frequency driving pulses within the preset output duration is specific, that is, energy is specific). When the total output duration of the high-frequency driving pulses reaches a preset output duration of the current time period, the power supply is controlled to stop energy supply of the current time period for a period of time.

[0136] Continuing for a period of time refers to a period from a moment at which the controller stops supplying energy to the induction heater assembly to a moment at which the current time period ends, and this is also referred to as the natural cooling period described above.

[0137] In this embodiment, statistics about whether the total output duration of the high-frequency driving pulses reaches the total output duration of the high-frequency driving pulses are collected, so that the power supply is controlled to stop energy supply of the current time period, which can precisely and rapidly provide the set energy to the current time period.

[0138] In some embodiments, the method further includes the following steps.

[0139] A107: Determine a duration for which the power supply stops the energy supply of the current time period.

[0140] A108: If the duration satisfies a preset deadline threshold of the current time period, end the current time period, and control the power supply to activate the induction coil to output energy supply of a next time period.

[0141] In this embodiment, the natural cooling period is preset, and is related to factors such as the heat insulation performance of the induction heater assembly or a heat transfer requirement between the induction heater assembly and the aerosol generating substrate. Therefore, after energy supply of the current time period is completed, in a preset natural cooling period, the controller controls the power supply to stop supplying energy to the induction heater assembly, and determines, through timing, whether a duration for which energy supply is stopped reaches the preset deadline threshold. If the duration reaches the preset deadline threshold, the current time period is ended, and the power supply is controlled to activate the induction coil to output energy supply of a next time period.

[0142] In this embodiment, the natural cooling period is preset based on a heat transfer feature, so that the induction heater assembly performs heating in time periods, to provide an aerosol having good taste, and a temperature measurement device does not need to be depended on.

[0143] In some embodiments, the method further includes the following steps.

[0144] A109: If a sum of a duration for which the power supply continuously outputs the plurality of high-frequency driving pulses and a duration for which the power supply stops the energy supply of the current time period satisfies a duration of a preset time period, end the current time period, and control the power supply to activate the induction coil to output energy supply of a next time period.

[0145] It may be understood that, a period corresponding to which the power supply continuously outputs the plurality of high-frequency driving pulses is the foregoing heating period t+, and a period in which the power supply stops energy supply of the current time period is the foregoing natural cooling period t-. Therefore, the sum of the duration for which the power supply continuously outputs the plurality of high-frequency driving pulses and the duration for which the power supply stops energy supply of the current time period is a sum of the heating period t+ and the natural cooling period t-.

[0146] If the sum of the heating period t+ and the natural cooling period t- (that is, a time period) satisfies the duration of the preset time period, the current time period is ended, and the power supply is controlled to activate the induction coil to output energy supply of a next time period.

[0147] In this embodiment, the duration of the time period is monitored, and an end of the current time period and a start of a next time period are controlled, so that the induction heater assembly performs heating in time periods, to provide an aerosol having good taste, and the temperature measurement device does not need to be depended on.

[0148] In some embodiments, the aerosol generating device further includes a temperature sensor configured to determine a temperature of the sensor.

[0149] After the foregoing step A20, the method may further include the following steps.

[0150] A50: Obtain a real-time temperature of the sensor that is measured by the temperature sensor.

[0151] A60: If the real-time temperature is less than or equal to a preset low-temperature threshold, end the current time period, and control the power supply to activate the induction coil to output energy supply of a next time period.

[0152] The preset low-temperature threshold is a lower temperature limit of the temperature of the sensor. In some embodiments, a person skilled in the art may set the low-temperature threshold based on a pre-heat temperature and / or a heat insulation performance of the induction heater assembly.

[0153] Specifically, in the natural cooling period, if it is detected that the real-time temperature of the sensor is less than the low-temperature threshold, it indicates that there is excessive heat loss, which affects whether the sensor can reach or maintain a target temperature (for example, a heat insulation temperature or an inhalation temperature), the power supply needs to be controlled to activate the induction coil to output energy supply of a next time period, to ensure the temperature of the sensor. In this case, it is equivalent to ending the current time period and entering a next time period.

[0154] In this embodiment, the low-temperature threshold is set as a trigger threshold for ending a natural cooling stage and starting a next time period, so that the induction heater assembly performs heating in time periods, and provides an aerosol having good taste.

[0155] In some embodiments, after the foregoing step A20, the method may further include the following steps.

[0156] A70: Obtain a resonance voltage of the induction coil.

[0157] A80: If the resonance voltage is less than or equal to a preset low-pressure threshold, end the current time period, and control the power supply to activate the induction coil to output energy supply of a next time period.

[0158] Referring to FIG. 9, a resonance voltage Ufb of the induction coil is in a step linear relationship with the temperature of the sensor. Therefore, the temperature of the sensor may be deduced through the step linear relationship between the resonance voltage Ufb and the temperature of the sensor.

[0159] In some embodiments, within at least a single second time period or a third time period, in a process of outputting the plurality of continuous high-frequency driving pulses, the resonance voltage of the induction coil gradually increases as the temperature of the sensor gradually increases, and subsequently, in the natural cooling period, the resonance voltage gradually attenuates and decreases because of an impact of damped oscillation and a resistance of the sensor.

[0160] In some embodiments, referring to FIG. 10, a circuit in which the induction coil is located includes a resonance circuit and a half-wave rectification circuit. With reference to FIG. 4, the resonance circuit includes an induction coil and a capacitor that are connected in series. The half-wave rectification circuit is connected to the capacitor, to perform half-wave rectification on a voltage signal of the capacitor, and use a rectified voltage as the resonance voltage of the induction coil.

[0161] Specifically, as shown in FIG. 10, a voltage of the power supply is in a range of 3.3V to 4.2V, and is boosted to 5V by using a Boost circuit. The switches K1 and K2 are alternately turned on, and a direct current voltage of the power supply is provided to the LC oscillator (the induction coil L and the capacitor C) in a high-frequency driving pulse manner. The LC oscillator generates inverse vibration through alternate energy storage and discharging of the capacitor C, to form an alternating current flowing through the induction coil L, so that the induction coil L generates an alternating magnetic field. The sensor is induced to generate eddy current heating in the alternating magnetic field.

[0162] The half-wave rectification circuit is connected to the capacitor C in parallel, to perform half-wave rectification on the voltage signal of the capacitor, and output the half-wave rectification as the resonance voltage of the induction coil. In some embodiments, as shown in FIG. 10, the half-wave rectification circuit includes a first resistance R1, a second resistance R2, and a diode. The first resistance R1 and the second resistance R2 that are connected in series are connected to the capacitor C in parallel, and the diode is connected is connected to the first resistance R1 in parallel. An output terminal of the diode is a voltage detection terminal (ADC). The half-wave rectification circuit is set in the foregoing manners, so that a voltage wave (an alternating voltage) across the capacitor C is divided by the first resistance R1, and then is inputted to the diode. Based on the diode, only one half cycle of the alternating voltage is allowed to pass, and the other half cycle on a direct current side is prevented. Therefore, the diode converts the alternating current voltage into the direct current voltage for output. Therefore, it is convenient to collect an accurate real-time voltage Ufb at the voltage detection terminal (ADC), and subsequently, it is convenient to indirectly determine a real-time temperature through the step linear relationship shown in FIG. 9. In other embodiments, the half-wave rectification circuit in the foregoing embodiment may be replaced with a full-wave rectification circuit, and a structure thereof is not described in detail herein again.

[0163] The preset low-pressure threshold is obtained by converting the low-temperature threshold through the step linear relationship. When the real-time voltage is less than or equal to the preset low-pressure threshold, it indicates that the temperature of the sensor is less than the low-temperature threshold, and excessive heat is lost, which affects whether the sensor can reach or maintain the target temperature (for example, the heat insulation temperature or the inhalation temperature). Therefore, the power supply needs to be controlled to immediately provide heating energy to the induction heater assembly, to ensure the temperature of the sensor. In this case, it is equivalent to ending the current time period and entering a next time period.

[0164] In this embodiment, the temperature of the sensor is indirectly known by detecting the resonance voltage of the induction coil, to determine whether the natural cooling period ends. In the foregoing method, the temperature sensor may be omitted, thereby effectively reducing product costs.

[0165] In this embodiment, because of an association relationship between the resonance voltage of the induction coil and the temperature of the sensor, it may be learned that the resonance voltage of the induction coil also gradually increases, and then gradually decreases within a single time period, for example, within the second time period or the third time period.

[0166] In some embodiments, alarm information is outputted if it is detected that the resonance voltage is greater than a preset voltage threshold. The preset voltage threshold is obtained by converting the high-temperature threshold through the step linear relationship. If the resonance voltage is greater than the preset voltage threshold, it indicates that the temperature reaches a high-temperature threshold. Therefore, the alarm information is outputted to perform high-temperature warning, to protect safety of the aerosol generating device.

[0167] In conclusion, according to the control method in this embodiment of this application, based on an energy requirement feature in a process of baking an aerosol generating substrate, the entire baking process is divided into a plurality of time periods, and a corresponding energy parameter (including a plurality of high-frequency driving pulses, which correspond to specific energy) is set for each time period, so that the aerosol generating substrate receives, in time periods, heat outputted and transferred by the sensor in the induction heater assembly. Therefore, the baked aerosol can rapidly reach an inhalable state and maintain the inhalable state. Compared with a conventional control manner depending on a real-time temperature and a temperature curve of a heater, in this control manner, based on an energy requirement feature in a process of baking an aerosol generating substrate, an energy parameter (corresponding to specific energy) of each time period adapts to the feature of the baking process, and energy supply is controlled in time periods, so that the aerosol having good taste can be generated, and a quantity of aerosols can be maintained in the inhalable state, thereby improving taste and inhalation experience. In addition, the energy supply is controlled in time periods, so that dependency on a temperature measurement device can be eliminated, thereby avoiding a problem of insufficient or excessive heat absorption of the aerosol generating substrate caused by inaccurate temperature measurement. In addition, hardware costs can also be effectively reduced.

[0168] It should be noted that, the described device embodiments are merely exemplary. The units described as separate components may or may not be physically separate, and components displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected based on actual requirements to implement the objectives of the solutions of this embodiment.

[0169] Based on the foregoing descriptions of the implementations, a person skilled in the art may clearly understand that the implementations may be implemented by using software and a universal hardware platform, or by using hardware certainly. A person of ordinary skill in the art may understand that all or some of the processes of the methods in the embodiments may be implemented by indicating related hardware through a program. The program may be stored in a computer-readable storage medium. When the program is executed, the computer-readable instructions may include the processes of the foregoing method embodiments. The storage medium may be a magnetic disk, an optical disc, a read-only memory (ROM), a random access memory (RAM), or the like.

[0170] In conclusion, it should be noted that, the foregoing embodiments are merely used for describing the technical solutions of this application, but are not intended to limit the technical solutions of this application. In the idea of this application, technical features of the foregoing embodiments or different embodiments may also be combined, steps may be implemented in any sequence, and many other variations exist in different aspects of this application as described above. For brevity, they are not provided in detail. Although this application is described in detail with reference to the foregoing embodiments, it should be understood by a person skilled in the art the technical solutions described in the foregoing embodiments can still be modified, or some or all of technical features can be replaced by equivalents. However, these modifications or replacements do not cause the essence of corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of this application.

Claims

1. A control method, applied to an aerosol generating device, wherein: the aerosol generating device comprises an induction heater assembly and a power supply, the induction heater assembly comprising an induction coil configured to generate a changing magnetic field when a changing current flows and a sensor configured to be penetrated by the changing magnetic field generated by the induction coil to generate heat, to heat an aerosol generating substrate to generate an aerosol, and the power supply being configured to provide energy to the induction heater assembly; and the method comprises: controlling, after receiving a heating initiation instruction and based on mapping relationships between a plurality of time periods and energy parameters, the power supply to provide corresponding energy to the induction coil within respective ones of the plurality of time periods, wherein the energy provided in the time periods comprises a plurality of high-frequency driving pulses, and a duration of each of the time periods is greater than or equal to 500 ms.

2. The method according to claim 1, wherein the controlling the power supply to provide corresponding energy to the induction coil within respective ones of the plurality of time periods comprises: controlling, within a current time period, the power supply to continuously output the plurality of high-frequency driving pulses, to provide the energy to the induction coil; and controlling, if the provided energy reaches set energy for the current time period, the power supply to stop energy supply for the current time period for a period of time.

3. The method according to claim 1, wherein the controlling the power supply to provide corresponding energy to the induction coil within respective ones of the plurality of time periods comprises: controlling, within a current time period, the power supply to continuously output the plurality of high-frequency driving pulses, to provide the energy to the induction coil; and controlling, if a quantity of outputted high-frequency driving pulses reaches a preset quantity of pulses for the current time period, the power supply to stop energy supply for the current time period for a period of time.

4. The method according to claim 1, wherein the controlling the power supply to provide corresponding energy to the induction coil respectively within respective ones of the plurality of time periods comprises: controlling, within a current time period, the power supply to continuously output the plurality of high-frequency driving pulses, to provide the energy to the induction coil; and controlling, if a total output duration of the high-frequency driving pulses reaches a preset output duration for the current time period, the power supply to stop energy supply for the current time period for a period of time.

5. The method according to any one of claims 2 to 4, further comprising: determining a duration for which the power supply stops the energy supply for the current time period; and if the duration satisfies a preset deadline threshold of the current time period, ending the current time period, and controlling the power supply to activate the induction coil to output energy supply for a next time period.

6. The method according to any one of claims 2 to 4, further comprising: if a sum of a duration for which the power supply continuously outputs the plurality of high-frequency driving pulses and a duration for which the power supply stops the energy supply for the current time period satisfies a duration of a preset time period, ending the current time period, and controlling the power supply to activate the induction coil to output energy supply for a next time period.

7. The method according to any one of claims 2 to 4, wherein the aerosol generating device further comprises a temperature sensor configured to determine a temperature of the sensor, and the method further comprises: obtaining a real-time temperature of the sensor that is measured by the temperature sensor; and if the real-time temperature is less than or equal to a preset low-temperature threshold, ending the current time period, and controlling the power supply to activate the induction coil to output energy supply for a next time period.

8. The method according to any one of claims 2 to 4, further comprising: obtaining a resonance voltage of the induction coil; and if the resonance voltage is less than or equal to a preset low-pressure threshold, ending the current time period, and controlling the power supply to activate the induction coil to output energy supply for a next time period.

9. The method according to claim 1, wherein the controlling, after receiving a heating initiation instruction and based on mapping relationships between a plurality of time periods and energy parameters, the power supply to provide corresponding energy to the induction coil within respective ones of the plurality of time periods comprises: entering a heat-up stage after receiving the heating initiation instruction, the heat-up stage comprising a first time period; and controlling, based on a mapping relationship between the first time period and an energy parameter, the power supply to provide the corresponding energy to the induction coil at a maximum power within the first time period.

10. The method according to claim 1, wherein the controlling, after receiving a heating initiation instruction and based on mapping relationships between a plurality of time periods and energy parameters, the power supply to provide corresponding energy to the induction coil within respective ones of the plurality of time periods comprises: entering a heat insulation stage after receiving the heating initiation instruction, the heat insulation stage comprising a plurality of second time periods; and controlling, based on mapping relationships between the second time periods and energy parameters, the power supply to provide corresponding energy to the induction coil within respective ones of the plurality of second time periods.

11. The method according to claim 10, wherein durations of the second time periods are the same, or durations of at least two of the second time periods are different.

12. The method according to claim 10, wherein set energy for the plurality of second time periods is the same, or set energy for at least two of the second time periods is different.

13. The method according to claim 10, wherein a duration range of each of the second time periods ranges from 1 s to 2 s.

14. The method according to claim 1, wherein the controlling, after receiving a heating initiation instruction and based on mapping relationships between a plurality of time periods and energy parameters, the power supply to provide corresponding energy to the induction coil within respective ones of the plurality of time periods comprises: entering an inhalation stage after receiving the heating initiation instruction, the inhalation stage comprising a plurality of third time periods; and controlling, based on mapping relationships between the third time periods and energy parameters, the power supply to provide corresponding energy to the induction coil respectively within respective ones of the plurality of third time periods.

15. The method according to claim 14, wherein durations of the third time periods are the same, or durations of at least two of the third time periods are different.

16. The method according to claim 14, wherein set energy for the plurality of third time periods is the same, or set energy for at least two of the third time periods is different.

17. The method according to claim 14, wherein a duration range of each of the third time periods is greater than 10 s.

18. The method according to claim 14, wherein energy corresponding to at least one third time period located at an early inhalation stage is greater than energy corresponding to at least one third time period located at a late inhalation stage.

19. The method according to claim 14, wherein at the inhalation stage, a temperature difference between a highest temperature of the real-time temperature of the sensor and a lowest temperature of the real-time temperature of the sensor ranges from 10°C to 50°C.

20. The method according to claim 1, wherein within a single time period, a real-time temperature of the sensor gradually increases and then gradually decreases.

21. The method according to claim 1, further comprising: obtaining a resonance voltage of the induction coil, wherein within a single time period, the resonance voltage of the induction coil gradually increases and then gradually decreases.

22. The method according to claim 1, further comprising: obtaining a resonance voltage of the induction coil; and outputting alarm information if the resonance voltage is greater than a preset voltage threshold.

23. An aerosol generating device, comprising: an induction heater assembly, comprising an induction coil and a sensor, the induction coil being configured to generate a changing magnetic field when a changing current flows, and the sensor being configured to be penetrated by the changing magnetic field generated by the induction coil to generate heat, to heat an aerosol generating substrate to generate an aerosol; a power supply, configured to provide energy to the induction heater assembly; and a controller, connected to the induction heater assembly and the power supply and configured to perform the control method according to any one of claims 1 to 22.

24. The aerosol generating device according to claim 23, wherein a circuit in which the induction coil is located comprises a resonance circuit and a half-wave rectification circuit, wherein the resonance circuit comprises an induction coil and a capacitor that are connected in series, and the half-wave rectification circuit is connected to the capacitor and is configured to perform half-wave rectification on a voltage signal of the capacitor, to output a resonance voltage of the induction coil.

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