Control method and aerosol generating device

Abstract

The embodiment of the invention relates to the technical field of electronic atomization, and discloses a control method and an aerosol generating device.The control method comprises the steps that after a heating starting instruction is received, a power source is controlled to provide corresponding energy for an induction coil in multiple time periods according to the mapping relation between the time periods and energy parameters, and the corresponding energy is supplied to the induction coil; wherein the energy provided by the time period consists of a plurality of high-frequency driving pulses, and the duration of the time period is greater than or equal to 500ms. Compared with a conventional mode which depends on the real-time temperature and the temperature curve of the heater for control, on one hand, starting from the energy demand characteristics in the aerosol-forming substrate baking process, the set energy in each time period adapts to the baking process characteristics, and energy supply is controlled in different time periods; the aerosol with good taste can be generated, and the taste and the smoking experience can be improved. And on the other hand, the dependence on a temperature detection device can be eliminated, the problem of insufficient or excessive heat absorption of the aerosol forming substrate caused by inaccurate temperature detection is avoided, and the hardware cost can be effectively reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electronic atomization technology, and in particular to a control method and an aerosol generating device. Background Art

[0002] The aerosol generating device uses a heater to heat and bake the aerosol forming substrate to generate an aerosol for use by the user. Generally, the existing aerosol generating device adjusts the temperature of the heater by changing the power output of the power supply, and controls the temperature according to a preset temperature curve.

[0003] In some solutions known to the inventors of the present application, the real-time temperature of the heater is collected by a temperature sensor, and the power is adjusted according to the deviation between the real-time temperature and the ideal temperature on the temperature curve so that the temperature of the heater meets the ideal temperature on the temperature curve. However, this method depends on the accuracy of the temperature sensor and the rationality of the temperature curve. Summary of the invention

[0004] Some embodiments of the present application provide a control method for an aerosol generating device, which provides energy in time periods based on the energy demand during the baking process of an aerosol-forming substrate to improve taste and smoking experience.

[0005] In a first aspect, some embodiments of the present application provide a control method, which is applied to an aerosol generating device, wherein the aerosol generating device includes an induction heater component and a power supply, wherein the induction heater component includes an induction coil, which is configured to generate a changing magnetic field when a changing current flows through the induction coil; a susceptor, which is configured to be penetrated by the changing magnetic field generated by the induction coil to generate heat, thereby heating an aerosol-forming substrate to generate an aerosol, and the power supply is used to provide energy to the induction heater component;

[0006] Methods include:

[0007] After receiving the instruction to start heating, according to the mapping relationship between the time period and the energy parameter, the power supply is controlled to provide corresponding energy to the induction coil in a plurality of time periods respectively;

[0008] The energy provided by the time period is composed of a plurality of high-frequency driving pulses, and the duration of the time period is greater than or equal to 500 ms.

[0009] In some embodiments, the controlling the power supply to provide corresponding energy to the induction coil in the plurality of time periods respectively includes:

[0010] In the current time period, controlling the power supply to continuously output a plurality of high-frequency driving pulses to provide energy to the induction coil;

[0011] If the supplied energy reaches the set energy for the current time period, the power supply is controlled to stop supplying energy for the current time period and continue for a period of time.

[0012] In some embodiments, the controlling the power supply to provide corresponding energy to the induction coil in the plurality of time periods respectively includes:

[0013] In the current time period, controlling the power supply to continuously output a plurality of high-frequency driving pulses to provide energy to the induction coil;

[0014] If the total output duration of the high-frequency driving pulse reaches the preset output duration of the current time period, the power supply is controlled to stop the energy supply of the current time period and continue for a period of time.

[0015] In some embodiments, it also includes:

[0016] Determine the duration of the power supply stopping the energy supply in the current time period;

[0017] If the duration meets the preset end time threshold of the current time period, the current time period ends, and the power supply is controlled to start outputting energy supply to the induction coil for the next time period.

[0018] In some embodiments, it also includes:

[0019] If the sum of the duration of the power supply continuously outputting multiple high-frequency drive pulses and the duration of the power supply stopping the energy supply of the current time period meets the preset time period length, the current time period ends, and the power supply is controlled to start outputting energy supply to the induction coil for the next time period.

[0020] In some embodiments, the aerosol generating device further comprises a temperature sensor configured to determine a temperature of the susceptor; the method further comprises:

[0021] Acquire the real-time temperature of the receptor detected by the temperature sensor;

[0022] If the real-time temperature is less than or equal to the preset low temperature threshold, the current time period ends, and the power supply is controlled to start outputting energy supply for the next time period to the induction coil.

[0023] In some embodiments, the method further comprises:

[0024] obtaining a resonant voltage of the induction coil;

[0025] If the resonant voltage is less than or equal to the preset low-voltage threshold, the current time period ends, and the power supply is controlled to start outputting energy supply to the induction coil for the next time period.

[0026] In some embodiments, after receiving the instruction to start heating, according to the mapping relationship between the time period and the energy parameter, controlling the power supply to provide corresponding energy to the induction coil in multiple time periods respectively includes:

[0027] After receiving the heating start instruction, entering the heating stage, the heating stage includes a first time period;

[0028] In the first time period, according to the mapping relationship between the first time period and the energy parameter, the power supply is controlled to provide corresponding energy to the induction coil in a maximum power manner.

[0029] In some embodiments, after receiving the instruction to start heating, according to the mapping relationship between the time period and the energy parameter, controlling the power supply to provide corresponding energy to the induction coil in multiple time periods respectively includes:

[0030] After receiving the instruction to start heating, entering the heat preservation stage, the heat preservation stage includes a plurality of second time periods;

[0031] In a plurality of the second time periods, the power supply is controlled to provide corresponding energy to the induction coil according to the mapping relationship between the second time periods and the energy parameters.

[0032] In some embodiments, the durations of the second time periods are the same; or, the durations of at least two of the second time periods are different.

[0033] In some embodiments, the set energies of the multiple second time periods are the same; or, the set energies of at least two of the second time periods are different.

[0034] In some embodiments, the duration of the second time period ranges from 1s to 2s.

[0035] In some embodiments, after receiving the instruction to start heating, according to the mapping relationship between the time period and the energy parameter, controlling the power supply to provide corresponding energy to the induction coil in multiple time periods respectively includes:

[0036] After receiving the instruction to start heating, entering the suction stage, the suction stage is provided with a plurality of third time periods;

[0037] In the plurality of third time periods, the power supply is controlled to provide corresponding energy to the induction coil according to the mapping relationship between the third time periods and the energy parameters.

[0038] In some embodiments, the durations of the third time periods are the same; or, the durations of at least two of the third time periods are different.

[0039] In some embodiments, the set energies of the plurality of third time periods are the same; or, the set energies of at least two of the third time periods are different.

[0040] In some embodiments, the third time period has a duration of more than 10 seconds.

[0041] In some embodiments, the energy corresponding to at least one third time period located in the early stage of the inhalation phase is greater than the energy corresponding to at least one third time period located in the late stage of the inhalation phase.

[0042] In some embodiments, during the inhalation phase, the temperature difference between the highest temperature and the lowest temperature of the real-time temperature of the susceptor ranges from 10°C to 50°C.

[0043] In some embodiments, within a single period of time, the real-time temperature of the susceptor gradually increases and then gradually decreases.

[0044] In some embodiments, the resonant voltage of the induction coil is obtained, wherein, within a single time period, the resonant voltage of the induction coil gradually increases and then gradually decreases.

[0045] In some embodiments, obtaining a resonant voltage of the induction coil;

[0046] If the resonant voltage is greater than a preset voltage threshold, an alarm message is output.

[0047] In a second aspect, some embodiments of the present application provide an aerosol generating device, comprising:

[0048] an induction heater assembly, comprising an induction coil and a susceptor, the induction coil being configured to generate a varying magnetic field when a varying current flows therethrough, the susceptor being configured to be penetrated by the varying magnetic field generated by the induction coil to generate heat, thereby heating an aerosol-forming substrate to generate an aerosol;

[0049] a power source for providing energy to the induction heater assembly;

[0050] A controller is connected to the induction heater assembly and a power source, and is used to execute the control method according to the first aspect.

[0051] In some embodiments, the induction coil includes a resonant circuit and a half-wave rectifier circuit. The resonant circuit includes an induction coil and a capacitor connected in series. The half-wave rectifier circuit is connected to the capacitor and is used to perform half-wave rectification on the voltage signal of the capacitor to output the resonant voltage of the induction coil.

[0052] The control method provided in the embodiment of the present application is applied to an aerosol generating device, which includes an induction heater component and a power supply, the induction heater component includes an induction coil, which is configured to generate a changing magnetic field when a changing current flows through it; a sensor, which is configured to be penetrated by the changing magnetic field generated by the induction coil to generate heat, thereby heating the aerosol-forming matrix to generate an aerosol, and the power supply is used to provide energy to the induction heater component. The control method includes, after receiving a heating start instruction, controlling the power supply to provide energy to the induction coil in a time-sharing manner according to a mapping relationship between a plurality of time periods and set energy, wherein the set energy includes a plurality of high-frequency drive pulses.

[0053] In this embodiment, the entire baking process is divided into multiple time periods based on the energy demand characteristics of the aerosol-forming substrate during baking, and multiple high-frequency driving pulses corresponding to each time period are set, so that the aerosol-forming substrate receives the heat output by the receptor in different time periods, and the aerosol generated after baking can quickly reach the inhalable state and maintain the inhalable state. Compared with the conventional control method that relies on the real-time temperature and temperature curve of the heater for control, this control method, on the one hand, based on the energy demand characteristics of the aerosol-forming substrate during baking, makes the set energy of each time period adapt to the characteristics of the baking process, controls the energy supply in different time periods, can produce an aerosol with a good taste, and the amount of aerosol can be maintained in an inhalable state, thereby improving the taste and suction quality. On the other hand, controlling the energy supply in different time periods can get rid of the dependence on the temperature detection device, avoid the problem of insufficient or excessive heat absorption of the aerosol-forming substrate due to inaccurate temperature detection, and effectively reduce the hardware cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0055] Figure 1 It is a schematic diagram of inserting an aerosol-forming article into an aerosol-generating device in some embodiments of the present application;

[0056] Figure 2 This is a schematic diagram of the structure of an aerosol generating device in some embodiments of the present application;

[0057] Figure 3 This is a schematic diagram of the structure of an aerosol-forming article in some embodiments of the present application;

[0058] Figure 4 This is a schematic diagram of the working principle of the induction heater assembly in some embodiments of the present application;

[0059] Figure 5 A schematic diagram of a high-frequency driving pulse of a voltage in some embodiments of the present application;

[0060] Figure 6 This is a schematic diagram of the structure of the induction heater assembly in some embodiments of the present application;

[0061] Figure 7 This is a flow chart of the control method in some embodiments of the present application;

[0062] Figure 8 A schematic diagram showing the comparison between the temperature change of the sensor and the high-frequency driving pulse voltage in some embodiments of the present application;

[0063] Fig. 9 This is a schematic diagram of the relationship between the voltage Ufb and the temperature of the sensor in some embodiments of the present application;

[0064] Fig.10 Schematic diagram of the circuit structure of the induction coil in some embodiments of the present application. DETAILED DESCRIPTION

[0065] The present application is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements can also be made without departing from the concept of the present application. These all belong to the protection scope of the present application.

[0066] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0067] 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, all within the scope of protection of the present application. In addition, although the functional module division is performed in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a sequence different from the module division in the device or the flow chart. In addition, the words "first", "second", "third", etc. used herein do not limit the data and execution order, but only distinguish the same items or similar items with basically the same functions and effects.

[0068] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning 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" used in this specification includes any and all combinations of one or more of the related listed items.

[0069] 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.

[0070] Figure 1 and Figure 2 An aerosol generating device 10 provided in some embodiments of the present application includes: a chamber 11, an induction heater assembly 12, a power source 14 and a controller 15. The controller 15 is electrically connected to the power source 14 and the induction heater assembly 12.

[0071] The chamber 11 is used to receive the aerosol-forming article 20. The aerosol-forming article 20 can be inserted into or removed from the chamber 11 through the opening A on the aerosol generating device 10.

[0072] like Figure 3 As shown, in some embodiments, the aerosol-forming article 20 includes a filter segment 21 and a matrix material segment 22. The matrix material segment 22 includes an aerosol-forming matrix. The aerosol-forming matrix is ​​a matrix that can release volatile compounds that can form an aerosol. Such volatile compounds can be released by heating the aerosol-forming matrix. The aerosol-forming matrix can be a solid aerosol-forming matrix. Alternatively, the aerosol-forming matrix can include solid and liquid components.

[0073] In certain embodiments, the aerosol-forming substrate may include a tobacco-containing material that includes volatile tobacco flavor compounds released from the substrate when heated. Alternatively, the aerosol-forming substrate may include a non-tobacco material. The aerosol-forming substrate may further include an aerosol former. The example of a suitable aerosol former is glycerol and propylene glycol.

[0074] The aerosol generated by heating the matrix material segment 22 is delivered to the user through the filter segment 21, which may be a cellulose acetate filter. The filter segment 21 may be sprayed with a flavoring liquid to provide a flavor, or a separate fiber coated with a flavoring liquid may be inserted into the filter segment to improve the durability of the flavor delivered to the user. The filter segment 21 may also have a capsule in a spherical or cylindrical shape, which may contain a content of a flavoring substance.

[0075] exist Figure 3Only the components of the aerosol-forming article 20 related to this embodiment are shown. Accordingly, those skilled in the art related to this embodiment should understand that the aerosol-forming article 20 may also include components other than Figure 3 For example, a cooling section for cooling the aerosol generated by heating the matrix material section 22 so that the user can inhale the aerosol cooled to a suitable temperature.

[0076] The power source 14 provides power for operating the aerosol generating device 10. For example, the power source 14 can provide power to the induction heater assembly 12, and the induction heater assembly 12 generates heat after receiving power to generate heating energy, and the power required by the display device, sensor, motor, etc. In addition, the power source 14 can provide the power required to operate other components provided in the aerosol generating device 10, such as the power required by the display device, sensor, motor, etc. The power source 14 can be a rechargeable battery or a disposable battery. The power source 14 can be, but is not limited to, a lithium iron phosphate (LiFePO4) battery. For example, the power source 14 can be a lithium cobalt oxide (LiCo02) battery or a lithium titanate battery.

[0077] When the aerosol-forming article 20 is inserted into the chamber 11, the power provided by the power source 14 can cause the induction coil in the induction heating assembly 12 to induce the susceptor to generate heating energy, and the heating energy is transmitted to the aerosol-forming article 20, so that the temperature of the aerosol-forming substrate therein is increased to generate aerosol. The generated aerosol is transmitted to the user through the filter segment 21 of the aerosol-forming article 20 for inhalation.

[0078] The induction heater assembly 12 is used to heat the aerosol-forming substrate in the aerosol-forming article 20 to generate an inhalable aerosol. The induction heater assembly 12 includes an induction coil 121 and a susceptor 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 susceptor 122, the susceptor 122 generates heat, thereby heating the aerosol-forming substrate to generate an aerosol.

[0079] In some embodiments, see Figure 4 The induction coil 121 includes a resonant circuit, which includes an induction coil and a capacitor connected in series, and two switches (K1 and K2). Specifically, the heating principle of the induction heater assembly is: the capacitor C and the induction coil L form an LC oscillator, and since the switches K1 and K2 are alternately turned on, the DC voltage of the power supply is provided to the LC oscillator in the form of high-frequency driving pulses. Figure 5, which is a schematic diagram of a high-frequency driving pulse of a voltage. The LC oscillator generates an inverter oscillation through the alternating energy storage and discharge of the capacitor C, forming 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 form eddy currents and generate heat in the alternating magnetic field.

[0080] See also Figure 6 (a) and Figure 6 In (b), in some embodiments, the induction coil is disposed on the outer surface of the tubular substrate. The tubular substrate is a tubular component along the axial direction of the chamber and surrounding the chamber. In some embodiments, the tubular substrate can be a tubular component made of a heat-insulating material.

[0081] It is understood that the susceptor 122 is made of a metal material, wherein the susceptor 122 may include metal or carbon. In one embodiment, the susceptor 122 may include a ferromagnetic material, such as ferrite, ferromagnetic steel or stainless steel. In one embodiment, the susceptor 122 includes a nickel-iron alloy. In one embodiment, the susceptor 122 includes 400 series stainless steel, and the 400 series stainless steel includes 410 grade, 420 grade or 430 grade stainless steel. In one embodiment, the susceptor 122 includes graphite or a graphite alloy. Thus, the susceptor 122 can generate heat in the changing magnetic field generated by the induction coil to convert electrical energy into thermal energy. The shape of the susceptor 122 can be set by a person skilled in the art. Please refer to Figure 6 In (a), in some embodiments, the susceptor 122 is tubular and can serve as the inner wall of the chamber 11. When the aerosol-forming article 20 is inserted into the chamber 11, the inner wall of the susceptor 122 is close to or in contact with the outer periphery of the aerosol-forming article 20. Thus, when the susceptor 122 generates heat, the heat can be effectively transferred to the aerosol-forming article 20 to bake the aerosol-forming substrate.

[0082] See also Figure 6 In (b), in some embodiments, the susceptor 122 is in the form of a sheet, needle or pin and is disposed in the chamber. When the aerosol-forming article is inserted into the chamber, the susceptor 122 penetrates into the interior of the aerosol-forming article 20 and contacts the aerosol-generating substrate. Thus, when the susceptor 122 heats up, the heat can be effectively transferred to the aerosol-forming article 20 to bake the aerosol-forming substrate.

[0083] In some embodiments, a metal sheet or metal needle is built into the aerosol-forming article 20. When the aerosol-forming article 20 is inserted into the chamber 11, the metal sheet or metal needle built therein acts as a susceptor 122, which generates heat under the action of the changing magnetic field generated by the induction coil 121 to bake the aerosol-forming matrix. It is understood that in this embodiment, the susceptor 122 is disposable and is discarded after the aerosol-forming article 20 is used.

[0084] In some embodiments, the receptor 122 is disposed upstream of the air inlet channel and is not in direct contact with the aerosol-generating substrate. Instead, when the receptor 122 generates heat, the heat can be effectively transferred to the air to heat the air, and the heated air then enters the aerosol-forming product 20 to bake the aerosol-forming substrate.

[0085] The controller 15 can control the overall operation of the aerosol generating device 10. Specifically, the controller 15 controls the operation of the power supply 14 and the induction heater assembly 12, and can also control the operation of other devices. In some embodiments, the controller 15 includes a memory for storing program instructions corresponding to the control method in any of the following method embodiments, and also includes a monitoring circuit or timer for monitoring the power supply time, a detection circuit or temperature sensor for detecting the temperature, etc. Thus, by implementing the control method in any of the following method embodiments, the energy supply is controlled in time periods to produce an aerosol with a good taste, and the amount of the aerosol can be maintained in a smokable state, thereby improving the taste and suction experience. In addition, it gets rid of the dependence on the temperature detection device, avoids the problem of insufficient or excessive heat absorption of the aerosol forming matrix due to inaccurate temperature detection, and can effectively reduce hardware costs.

[0086] The following describes the control methods provided in some embodiments of the present application in conjunction with the exemplary application and implementation of the aerosol generating device provided in the embodiments of the present application. Figure 7 , Figure 7 It is a flow chart of the control method provided by some embodiments of the present application. It can be understood that the execution subject of the control method can be one or more controllers.

[0087] like Figure 7 As shown, the control method S100 includes:

[0088] S10: After receiving the instruction to start heating, according to the mapping relationship between the time period and the energy parameter, the power supply is controlled to provide corresponding energy to the induction coil in multiple time periods; wherein the energy provided in the time period is composed of multiple high-frequency drive pulses, and the duration of the time period is greater than or equal to 500ms.

[0089] Among them, the mapping relationship includes a one-to-one correspondence between several time periods and energy parameters. These several time periods are distributed in the baking stage of the aerosol-forming product, that is, the time period from the start of baking the aerosol-generating matrix to the time when the aerosol-generating matrix is ​​consumed or substantially consumed. In other words, the entire baking process (service life) of the aerosol-forming product is divided into multiple time periods. Each time period corresponds to an energy parameter. In some embodiments, the energy parameters include parameters that can characterize the energy, such as the set energy, the number of high-frequency drive pulses, or the continuous output duration of the high-frequency drive pulse.

[0090] Based on the heating principle of the aforementioned induction heater assembly, it can be known that the induction heater assembly first converts the electrical 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 by the DC voltage of the power supply in the form of high-frequency driving pulses and converted.

[0091] Among them, the energy parameters of each time period are determined based on the energy demand characteristics during the baking process of the aerosol-forming substrate. In some embodiments, the energy parameters can be experimental values ​​obtained based on a large number of test experiments of the applicant in combination with the material of the specific aerosol-forming substrate after the installation design of the aerosol generating device is completed, or they can be empirical values. It can be understood that, taking the energy parameter as an example of setting the energy, the setting energy can be adjusted based on the thermal insulation performance of the induction heater assembly, or based on the heat transfer rate between the aerosol-generating substrate and the receptor, etc.

[0092] It is understood that, in some embodiments, the mapping relationship may be pre-stored in the memory of the aerosol generating device for the controller to call. In some embodiments, the mapping relationship is stored in an external device that is communicatively connected to the aerosol generating device, such as a cloud server, a charging box memory, or a memory of the aerosol generating device connected thereto. The controller may call the mapping relationship from the external memory or server during operation.

[0093] Therefore, after receiving the instruction to start heating, the controller calls the mapping relationship and controls the power supply to provide energy to the induction coil in a time-sharing manner according to a number of one-to-one corresponding time periods and energy parameters.

[0094] Among them, the start heating instruction can be a signal generated by the user operating the input element, or it can be obtained by relying on the detection signal of the sensor, such as a trigger signal of the aerosol-forming product 20 being inserted into the aerosol generating device 10 through a pressure sensor or an electrical parameter sensor, or a signal detected by an airflow sensor to start the aerosol by the user's inhalation.

[0095] It is understandable that these multiple time periods may be distributed in the entire working stages of the aerosol generating device 10, namely, the heating stage, the heat preservation stage and the inhalation stage, or may be distributed only in the heat preservation stage or only in the inhalation stage.

[0096] The temperature rise stage refers to the period of time from when the aerosol generating device starts to heat up after it is started. During the temperature rise stage, the temperature of the aerosol-forming substrate needs to be increased quickly to reach the preheating temperature for generating a satisfactory amount of aerosol. The heat preservation stage refers to the temperature that needs to be maintained at or slightly below the preheating temperature. Aerosol can be generated during this stage, but it 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 can be generated by the aerosol generating device at a satisfactory rate and inhaled by the user.

[0097] The controller controls the power supply to supply energy to the induction heater assembly according to the mapping relationship, and the energy supply in a single time period is carried out according to the energy parameters corresponding to the pre-set time period.

[0098] In this embodiment, the entire baking process is divided into multiple time periods based on the energy demand characteristics of the aerosol-forming substrate during baking, and multiple high-frequency driving pulses (i.e., energy is set) are set for each time period, so that the aerosol-forming substrate receives the heat output and transmission of the induction heating component in different time periods, and the aerosol generated after baking can quickly reach the inhalable state and maintain the inhalable state. Compared with the conventional control method that relies on the real-time temperature and temperature curve of the heater for control, this control method, on the one hand, based on the energy demand characteristics of the aerosol-forming substrate during baking, makes the energy provided in each time period adapt to the characteristics of the baking process, controls the energy supply in different time periods, can produce an aerosol with a good taste, and the amount of the aerosol can be maintained in an inhalable state, thereby improving the taste and the suction experience. On the other hand, controlling the energy supply in different time periods can get rid of the dependence on the temperature detection device, avoid the problem of insufficient or excessive heat absorption of the aerosol-forming substrate due to inaccurate temperature detection, and effectively reduce the hardware cost.

[0099] In some embodiments, step S10 specifically includes:

[0100] S11: After receiving the heating start instruction, the heating stage is entered, and the heating stage is provided with a first time period.

[0101] S12: In the first time period, according to the mapping relationship between the first time period and the energy parameter, the power supply is controlled to provide corresponding energy to the induction coil in a maximum power manner.

[0102] See also Figure 8 During the heating stage, the heating requirement is to enable the induction heater assembly to quickly reach the preheating temperature Tmax to increase the heat transfer rate between the induction heater assembly and the aerosol-forming substrate.

[0103] In this embodiment, the temperature rise stage corresponds to a first time period in the aforementioned mapping relationship, for example, the first time period may be the first time period in the mapping relationship. It is understandable that the first time period corresponds to an energy parameter, and the energy parameter can reflect the energy required to be provided in the first time period. The energy reflected by the energy parameter can enable the susceptor to reach the preheating temperature Tmax.

[0104] In some embodiments, in order to shorten the time to reach the preheating temperature and increase the heating rate, the control power supply provides the energy reflected by the energy parameter corresponding to the first time period to the induction coil in the form of maximum power. For example, if the maximum power is 20W and the energy corresponding to the first time period is 160J, the control power supply outputs at the maximum power of 20W for 8s and stops the output of the first time period after reaching 160J. It can be understood that in some embodiments, such as Figure 8 As shown, during the time period (t0-t1), the maximum power is continuously output. After the temperature reaches Tmax, it will decrease due to natural cooling and transition to the subsequent insulation stage.

[0105] In this embodiment, by controlling the power supply to output the energy required for the first time period at maximum power during the heating stage, the heating rate can be increased so that the sensor can quickly reach the preheating temperature, which is beneficial to improving the subsequent heat transfer rate.

[0106] In some embodiments, step S10 further specifically includes:

[0107] S13: After receiving the instruction to start heating, the heat preservation stage is entered. The heat preservation stage includes multiple second time periods. In the multiple second time periods, according to the mapping relationship between the second time periods and the energy parameters, the power supply is controlled to provide corresponding energy to the induction coil.

[0108] The insulation stage refers to the need to maintain the preheating temperature or a temperature slightly lower than the preheating temperature, and the aerosol continues to be generated during this stage. It is understandable that in the insulation stage, the heating requirement is to maintain the heat transfer between the aerosol-forming substrate and the heater, so that the aerosol-forming substrate can continue to absorb heat from the induction heater assembly for a period of time (e.g., 5s-8s) to generate aerosol.

[0109] In this example, please continue to see Figure 8 , the duration of the heat preservation stage is divided into multiple second time periods. That is, the heat preservation stage corresponds to multiple second time periods in the aforementioned mapping relationship. For example, the total duration (t2-t3) of a single second time period is 5s-8s.

[0110] Each second time period corresponds to an energy parameter, and the energy parameter reflects the energy provided to the second time period. It is understandable that, on the basis that the susceptor has reached the preheating temperature in the first time period, the energy reflected by the energy parameter corresponding to the second time period is much less than the energy reflected by the energy parameter in the first time period, and it is only necessary to compensate for the heat loss of the susceptor and maintain the temperature of the susceptor at the preheating temperature or a temperature slightly lower than the preheating temperature. In some embodiments, the set energy of the second time period can be 10J-20J.

[0111] In this embodiment, according to the partial mapping relationship corresponding to the insulation stage, the power supply is controlled to provide corresponding energy to the induction coil in each second time period, so that the aerosol-forming matrix can continue to absorb heat from the induction heater assembly to generate an aerosol required for the first puff.

[0112] In some embodiments, the setting energy of the first time period is greater than the sum of the setting energies of the plurality of second time periods.

[0113] It can be understood that the aforementioned temperature rise stage and temperature keeping stage constitute the preheating stage of the aerosol-forming product. In the temperature rise stage, it is necessary to quickly raise the temperature of the susceptor from room temperature to the preheating temperature Tmax. In the temperature keeping stage, the susceptor is maintained at the temperature keeping temperature (equal to the preheating temperature or slightly lower than the preheating temperature), so that there is enough time for heat exchange to occur between the aerosol-forming product and the susceptor, and further absorb heat to generate aerosol.

[0114] In some embodiments, the set energy of the first time period is greater than the sum of the set energies of multiple second time periods, that is, the set energy of the heating stage is greater than the sum of the set energies of the entire insulation stage. This is conducive to the aerosol generating matrix to quickly and sufficiently produce the expected aerosol, and can also effectively avoid heat waste in the insulation stage.

[0115] In some embodiments, the durations of the second time periods are the same, or the durations of the second time periods are not completely the same.

[0116] Generally, the total duration of multiple second time periods (t2-t3) is 5s-8s, wherein the duration of each second time period may be the same or different. Those skilled in the art may set it according to actual conditions. It is understood that within a second time period, there is a heating period with energy provided, and a natural cooling period without energy provided. Figure 8, the duration of any second time period is equal to the sum of the heating period t+ and the natural cooling period t-. During the heating period t+, due to the energy supply, the temperature of the sensor rises to Ta; during the natural cooling period t-, due to the heat loss, the temperature drops to Tb. After the temperature drops to Tb, it will be quickly raised to Ta due to the energy supply in the next second time period, and then naturally cool to Tb. This cycle makes the temperature change in a wave-like manner, and the average temperature can be maintained at the insulation temperature Tc.

[0117] In some embodiments, the duration of the second time period may be greater than or equal to 500ms, for example, the heating period t+ is about 300ms, and the natural cooling period t- is about 200ms, which can maintain the susceptor at the insulation temperature Tc. Based on the temperature difference between the aerosol-forming article and the susceptor, it can be known from the fact that heat is transferred from a high-temperature object to a low-temperature object that heat is transferred from the susceptor to the aerosol-forming article, so that after the aerosol-forming article absorbs the heat, the aerosol-forming matrix is ​​baked to generate an aerosol. In some embodiments, the duration of any second time period ranges from 1s to 2s.

[0118] Those skilled in the art may determine the duration of the second time period based on actual conditions such as the heat preservation performance of the aerosol generating device and the baking characteristics of the aerosol-forming product.

[0119] It is worth noting that the duration of the second time period is greater than or equal to 500ms, and the controller controls the power supply to supply energy continuously in a low-frequency manner according to the time period. Conventional PWM control usually outputs precise power at an output frequency of about 100Hz, which is a high-frequency output, which is different from the intention of this solution.

[0120] In some embodiments, the set energies of the multiple second time periods are the same.

[0121] In some embodiments, the set energy of the plurality of second time periods is reduced at least once. It is understandable that after the heat preservation stage ends, the suction stage is entered, and when entering the suction stage, it is necessary to transition from the heat preservation temperature to the suction temperature. In addition, as the heat preservation stage proceeds, after the aerosol generating substrate has accumulated sufficient heat, providing relatively less energy in the later stage of the heat preservation stage can also ensure sufficient aerosol generation and save energy consumption.

[0122] In some embodiments, the energy during the second time period is adjusted in the following manners, such as adjusting the input voltage of the induction coil, adjusting the resonant frequency by adjusting the resonant capacitor, or controlling the duration of multiple high-frequency pulse outputs to adjust the energy.

[0123] In some embodiments, the set energy of multiple second time periods can be implemented in multiple forms. For example, in these multiple second time periods, the set energy decreases in multiple steps over time, wherein the second time period covered by each step and the reduction amplitude can be adjusted according to actual needs. For example, in these multiple second time periods, the set energy decreases linearly over time, wherein it can decrease linearly with a constant slope or with a variable slope. For another example, in these multiple second time periods, the set energy changes in waves over time, that is, the set energy rises and falls over time.

[0124] In some embodiments, step S10 further specifically includes:

[0125] S14: After receiving the instruction to start heating, the suction stage is entered. The suction stage is provided with a plurality of third time periods. In the plurality of third time periods, the power supply is controlled to provide corresponding energy to the induction coil according to the mapping relationship between the third time periods and the energy parameters.

[0126] During the inhalation phase, the aerosol generating device needs to generate aerosol at a satisfactory rate when the user inhales. It is understood that during the inhalation phase, the heating requirement is to compensate for the heat loss taken away by the cold air drawn in, so that the aerosol-forming article can generate aerosol at a sufficient rate.

[0127] In this example, please continue to see Figure 8 , the puffing stage is divided into multiple third time periods. That is, the puffing stage corresponds to multiple third time periods in the aforementioned mapping relationship. Each third time period corresponds to an energy parameter, and the energy parameter reflects the set energy. It can be understood that when the aerosol-forming product has accumulated a lot of heat and reached the aerosol generation state, the third time period requires less energy to compensate for the heat loss. In some embodiments, the set energy reflected by the energy parameter corresponding to the third time period can be 5J-15J.

[0128] In this embodiment, according to the partial mapping relationship corresponding to the inhalation stage, the power supply is controlled to provide energy to the induction coil in a time-sharing manner, which can timely compensate for the heat loss taken away by the cold air sucked in, so that the aerosol-forming product produces aerosol sufficient for inhalation.

[0129] In some embodiments, the durations of the third time periods are the same, or the durations of at least two third time periods are different.

[0130] It is understood that the suction stage includes multiple third time periods, wherein the duration of each second time period may be the same or different. Those skilled in the art may set it according to actual conditions. It is understood that within a third time period, there is a heating period with energy provided, and a natural cooling period without energy provided. Please continue to refer to Figure 8 , the duration of any third time period is equal to the sum of the heating period t+ and the natural cooling period t-. During the heating period t+, the temperature of the sensor rises to Td due to energy supply; during the natural cooling period t-, the temperature drops to Te due to heat dissipation loss. After the temperature drops to Te, it will be quickly raised to Td due to the energy supply in the next second time period, and then naturally cool to Te. This cycle causes the temperature to change in a wave-like manner. During this process, the average temperature of the sensor is approximately Tf.

[0131] It can be understood that, when the energy provided by the energy parameter is constant, the longer the third time period is, the longer the corresponding natural cooling period is, and the greater the temperature drop is; the shorter the third time period is, the shorter the corresponding natural cooling period is, and the smaller the temperature drop is.

[0132] 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 about 300 ms, and the natural cooling period t- is about 200 ms. Based on the temperature difference between the aerosol-forming article and the receptor, it can be known from the fact that heat is transferred from a high-temperature object to a low-temperature object that heat is transferred from the receptor to the aerosol-forming article, so that after the aerosol-forming article absorbs the heat, the aerosol-generating matrix is ​​baked to produce an aerosol sufficient for one puff.

[0133] Those skilled in the art may determine the duration of the third time period based on actual conditions such as the heat preservation performance of the aerosol generating device, the baking characteristics and the suction characteristics of the aerosol-forming product.

[0134] It is worth noting that the duration of the third time period is greater than or equal to 500ms, preferably 1s-10s, or more than 10s, and the controller controls the power supply to supply energy continuously once in a low-frequency manner. Conventional PWM control usually outputs precise power at an output frequency of about 100Hz, which is a high-frequency output, which is different from the intention of this solution.

[0135] In some embodiments, the energy corresponding to at least one third time period located in the early stage of the inhalation phase is greater than the energy corresponding to at least one third time period located in the late stage of the inhalation phase.

[0136] It is understandable that the energy corresponding to at least one third time period in the early stage of the puffing stage is set to be greater than the energy corresponding to at least one third time period in the late stage of the puffing stage, so that the aerosol generating device can generate sufficient aerosol in the early stage of the puffing stage. Based on the heat accumulation of the aerosol generating substrate, in the late stage of the puffing stage, even if a relatively small set energy is provided compared to the early stage, the aerosol generating substrate can be fully baked, which does not affect the puffing and taste, and can effectively save energy.

[0137] In some embodiments, the energy during the third time period is adjusted in the following manners, such as adjusting the input voltage of the induction coil, adjusting the resonant frequency by adjusting the resonant capacitor, or controlling the duration of multiple high-frequency pulse outputs to adjust the energy.

[0138] In some embodiments, during the inhalation phase, the temperature difference between the highest temperature and the lowest temperature of the real-time temperature of the susceptor ranges from 10°C to 50°C.

[0139] Understandably, please refer again Figure 8 In the suction stage, the energy corresponding to the energy parameter is provided in the time period, and there is a natural cooling period in each time period without providing energy, so that the temperature of the sensor changes roughly in a wave-like manner with the time period as a cycle. The temperature difference between the highest temperature and the lowest temperature in a third time period ranges from 10℃ to 50℃.

[0140] For example, during the suction phase, the difference between td and te is 50°C, that is, the susceptor floats within ±25°C of its average temperature tf during the suction phase. For example, during the insulation phase, the difference between ta and tb is 10°C, that is, the susceptor floats within ±5°C of its average temperature tc.

[0141] In this embodiment, energy is supplied in time periods, and the temperature of the receptor changes roughly in a wave-like manner with the time period as a cycle. The temperature difference between the highest temperature and the lowest temperature ranges from 10°C to 50°C. As a result, the aerosol generating matrix receives heat from the heat transfer in time periods to produce an aerosol with a good taste.

[0142] In some embodiments, within a period of time, the real-time temperature of the susceptor gradually increases and then gradually decreases.

[0143] As can be seen from the above, a time period includes a heating period t+ and a natural cooling period t-. During the heating time t+, energy is provided to the induction coil in the induction heating component, and the real-time temperature of the susceptor gradually rises. During the natural cooling period t-, no energy is provided to the induction coil in the induction heating component, and the real-time temperature of the susceptor gradually decreases.

[0144] In some embodiments, taking the energy parameter as setting energy as an example, the aforementioned controlling the power supply to provide corresponding energy to the induction coil in multiple time periods respectively includes:

[0145] A101: During the current time period, the control power supply continuously outputs a plurality of high-frequency drive pulses to provide energy to the induction coil.

[0146] A102: If the energy supplied reaches the set energy for the current time period, the control power supply stops supplying energy for the current time period and continues for a period of time.

[0147] It can be understood that the current time period is any time period in the mapping relationship. When the heating is turned on, if the accumulated heating time falls within time period a, then this time period is the current time period.

[0148] The controller retrieves the energy parameters of the current time stage, and according to the energy parameters, the controller controls the power supply to continuously output a plurality of high-frequency driving pulses to provide energy to the induction coil.

[0149] The set energy is the energy reflected by the energy parameter. The controller can control the power supply to output multiple high-frequency drive pulses in a continuous and uninterrupted manner, which can better supplement the heat loss of the induction heater component and the aerosol generating matrix.

[0150] When the controller controls the power supply to output a plurality of high-frequency drive pulses, it synchronously counts the accumulated supplied energy that has been output.

[0151] If the supplied energy reaches the set energy corresponding to the current time period, the control power supply stops supplying energy in the current time period and continues for a period of time.

[0152] The continuous period of time refers to the time from when the controller stops supplying energy to the induction heater assembly to the end of the current time period, which is also referred to as the natural cooling period mentioned above.

[0153] In some embodiments, if the supplied energy reaches the set energy corresponding to the current time period (the energy reflected by the energy parameter), the power supply is controlled to maintain a relatively small energy output for a period of time. It is understandable that the relatively small energy output does not cause the temperature of the sensor to rise during the natural cooling period.

[0154] In this embodiment, by counting whether the supplied energy reaches the set energy corresponding to the current time period, the power supply is controlled to stop supplying energy in the current time period, so that the set energy can be provided accurately and quickly for the current time period.

[0155] In some embodiments, taking the energy parameter as the number of high-frequency drive pulses as an example, the aforementioned controlling the power supply to provide corresponding energy to the induction coil in multiple time periods respectively includes:

[0156] A103: During the current time period, the control power supply continuously outputs multiple high-frequency drive pulses to provide energy to the induction coil.

[0157] A104: If the number of high-frequency drive pulses outputted reaches the preset number of pulses in the current time period, the control power supply stops the energy supply in the current time period and continues for a period of time.

[0158] It can be understood that the current time period is any time period in the mapping relationship. When the heating is turned on, if the accumulated heating time falls within time period a, then this time period is the current time period.

[0159] The controller retrieves the energy parameters of the current time stage, and according to the energy parameters, the controller controls the power supply to continuously output a plurality of high-frequency driving pulses to provide energy to the induction coil.

[0160] When the controller controls the power supply to output multiple high-frequency drive pulses, it simultaneously counts the number of high-frequency drive pulses that have been output. Based on the fact that each high-frequency drive pulse corresponds to a certain amount of energy, a preset number of pulses (a certain amount of energy) can be set. When the number of high-frequency drive pulses that have been output reaches the preset number of pulses in the current time period, the control power supply stops supplying energy in the current time period and continues for a period of time.

[0161] The continuous period of time refers to the time from when the controller stops supplying energy to the induction heater assembly to the end of the current time period, which is also referred to as the natural cooling period mentioned above.

[0162] In this embodiment, by counting whether the number of high-frequency drive pulses outputted reaches the preset number of pulses in the current time period, the power supply is controlled to stop supplying energy in the current time period, thereby being able to accurately and quickly provide the set energy for the current time period.

[0163] In some embodiments, taking the energy parameter as the total output duration of the high-frequency drive pulse as an example, the aforementioned controlling the power supply to provide corresponding energy to the induction coil in multiple time periods respectively includes:

[0164] A105: During the current time period, the control power supply continuously outputs multiple high-frequency drive pulses to provide energy to the induction coil.

[0165] A106: If the total output duration of the high-frequency drive pulse reaches the preset output duration of the current time period, the control power supply stops the energy supply of the current time period and continues for a period of time.

[0166] It can be understood that the controller retrieves the energy parameters of the current time period, and according to the energy parameters, the controller controls the power supply to continuously output a plurality of high-frequency drive pulses to provide energy to the induction coil.

[0167] When the controller controls the power supply to output multiple high-frequency drive pulses, it synchronously counts the total output duration of the high-frequency drive pulses. Since each high-frequency drive pulse corresponds to a certain amount of energy, the output frequency of the high-frequency drive pulses is consistent, so a preset output duration can be set (the number of high-frequency drive pulses within the preset output duration is constant, that is, the energy is constant). When the total output duration of the high-frequency drive pulse reaches the preset output duration of the current time period, the control power supply stops the energy supply of the current time period and continues for a period of time.

[0168] The continuous period of time refers to the time from when the controller stops supplying energy to the induction heater assembly to the end of the current time period, which is also referred to as the natural cooling period mentioned above.

[0169] In this embodiment, by counting whether the total output duration of the high-frequency drive pulse reaches the total output duration of the high-frequency drive pulse, the power supply is controlled to stop supplying energy in the current time period, thereby being able to accurately and quickly provide the set energy for the current time period.

[0170] In some embodiments, the method further comprises:

[0171] A107: Determines the duration of the power supply stopping the energy supply for the current time period.

[0172] A108: If the duration meets the preset end time threshold of the current time period, the current time period ends, and the power supply is controlled to start outputting energy supply for the next time period to the induction coil.

[0173] In this embodiment, the natural cooling period is pre-set, which is related to factors such as the heat preservation performance of the induction heater assembly or the heat transfer requirements between the induction heater assembly and the aerosol forming substrate. Therefore, after completing the energy supply of the current time stage, within the preset natural cooling period, the controller controls the power supply to stop supplying energy to the induction heater assembly, and determines by timing whether the duration of stopping the energy supply reaches the preset cut-off time threshold. If reached, the current time period ends, and the control power supply starts to output the energy supply of the next time period to the induction coil.

[0174] In this embodiment, based on the heat transfer characteristics, a natural cooling period is preset so that the induction heater assembly is heated in time periods to provide an aerosol with a good taste without relying on a temperature detection device.

[0175] In some embodiments, the method further comprises:

[0176] A109: If the sum of the duration of the power supply continuously outputting multiple high-frequency drive pulses and the duration of the power supply stopping the energy supply of the current time period meets the preset time period length, the current time period ends, and the power supply is controlled to start outputting energy supply to the induction coil for the next time period.

[0177] It can be understood that the period corresponding to the power supply continuously outputting multiple high-frequency drive pulses is the heating period t+ mentioned above. The period during which the power supply stops supplying energy in the current time period is the natural cooling period t- mentioned above. Here, the sum of the duration during which the power supply continuously outputs multiple high-frequency drive pulses and the duration during which the power supply stops supplying energy in the current time period is the sum of the heating period t+ and the natural cooling period t-.

[0178] If the sum of the heating period t+ and the natural cooling period t- (i.e., a time period) meets the preset time period length, the current time period ends, and the power supply is controlled to start outputting energy supply for the next time period to the induction coil.

[0179] In this embodiment, by monitoring the duration of the time period and controlling the end of the current time period and the beginning of the next time period, the induction heater assembly can heat in time periods to provide an aerosol with a good taste without relying on a temperature detection device.

[0180] In some embodiments, the aerosol generating device further comprises a temperature sensor configured to determine the temperature of the susceptor.

[0181] After the aforementioned step A20, the following steps may also be included:

[0182] A50: Get the real-time temperature of the temperature sensor.

[0183] A60: If the real-time temperature is less than or equal to the preset low temperature threshold, the current time period ends, and the power supply is controlled to start outputting energy supply to the induction coil for the next time period.

[0184] The preset low temperature threshold is the lower temperature limit of the temperature of the sensor. In some embodiments, those skilled in the art can set the low temperature threshold according to the preheating temperature and / or the heat preservation performance of the induction heater assembly.

[0185] Specifically, during the natural cooling period, if the real-time temperature of the sensor is detected to be lower than the low temperature threshold, it means that the heat loss is too much, which will affect whether the sensor can reach or maintain the target temperature (such as the insulation temperature or the suction temperature). In this case, it is necessary to control the power supply to the induction coil to start outputting the energy supply for the next time period to ensure the temperature of the sensor. This is equivalent to ending the current time period and entering the next time period.

[0186] In this embodiment, by setting a low temperature threshold as a trigger threshold for ending the natural cooling stage and starting the next time period, the induction heater assembly can heat in time periods to provide an aerosol with a good taste.

[0187] In some embodiments, after the aforementioned step A20, the following may also be included:

[0188] A70: Get the resonant voltage of the induction coil;

[0189] A80: If the resonant voltage is less than or equal to the preset low-voltage threshold, the current time period ends and the control power supply starts outputting energy supply for the next time period to the induction coil.

[0190] See also Fig. 9 , the resonant voltage Ufb of the induction coil is in a step-linear relationship with the temperature of the sensor. Therefore, the temperature of the sensor can be derived from the resonant voltage Ufb and the step-linear relationship.

[0191] In some embodiments, at least in a single second time period or a third time period, the resonant voltage of the induction coil gradually increases during the output of a plurality of consecutive high-frequency driving pulses as the temperature of the receptor gradually increases, and then during the natural cooling period, the resonant voltage gradually decays and decreases due to the influence of damped oscillation and receptor resistance.

[0192] In some embodiments, see Fig.10 , the induction coil includes a resonant circuit and a half-wave rectifier circuit. Figure 4 The resonant circuit includes an inductor and a capacitor connected in series. A half-wave rectifier circuit is connected to the capacitor to perform half-wave rectification on the voltage signal of the capacitor, and the voltage obtained after rectification is used as the resonant voltage of the induction coil.

[0193] Specifically, Fig.10 As shown, the power supply voltage is 3.3V-4.2V, which is boosted to 5V by the Boost circuit. Switches K1 and K2 are turned on alternately, and the DC voltage of the power supply is provided to the LC oscillator (induction coil L and capacitor C) in the form of high-frequency drive pulses. The LC oscillator generates inverter oscillations through the alternating energy storage and discharge of capacitor C, forming 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 form eddy current heating in the alternating magnetic field.

[0194] A half-wave rectifier circuit is connected in parallel with the capacitor C to perform half-wave rectification on the voltage signal of the capacitor and output it as the resonant voltage of the induction coil. Fig.10As shown, the half-wave rectifier circuit includes a first resistor R1, a second resistor R2 and a diode. The first resistor R1 and the second resistor R2 connected in series are connected in parallel with the capacitor C, and the diode is connected in parallel with the first resistor R1. The output end of the diode is the voltage detection end (ADC). By setting the half-wave rectifier circuit in the above manner, the voltage wave (AC voltage) at both ends of the capacitor C is input into the diode after being divided by the first resistor R1. The diode only allows one and a half cycles of the AC voltage to pass through, and blocks the other half cycle of the DC side. Thus, the diode converts the AC voltage into a DC voltage output. Thus, it is convenient to collect the accurate real-time voltage Ufb at the voltage detection end (ADC), which is convenient for subsequent detection such as Fig. 9 The step linear relationship shown in is used to indirectly determine the real-time temperature. In other embodiments, the half-wave rectifier circuit in the above embodiment can be replaced by a full-wave rectifier circuit, and its structure will not be described in detail here.

[0195] The preset low-voltage threshold is obtained by converting the aforementioned low-temperature threshold through a step-by-step linear relationship. When the real-time voltage is less than or equal to the preset low-voltage threshold, it means that the temperature of the sensor is lower than the low-temperature threshold, indicating that the heat loss is too much, which will affect whether the sensor can reach or maintain the target temperature (such as the insulation temperature or the suction temperature). In this case, the power supply needs to be controlled to immediately provide heating energy to the induction heater component to ensure the temperature of the sensor. At this time, it is equivalent to ending the current time period and entering the next time period.

[0196] In this embodiment, the temperature of the sensor is indirectly known by detecting the resonant voltage of the induction coil to determine whether the natural cooling period is over. The temperature sensor can be omitted, effectively reducing product cost.

[0197] In this embodiment, due to the correlation between the resonant voltage of the induction coil and the temperature of the sensor, it can be obtained that within a single time period, such as the second time period or the third time period, the resonant voltage of the induction coil also gradually increases and then gradually decreases.

[0198] In some embodiments, if the monitored resonant voltage is greater than a preset voltage threshold, an alarm message is output. The preset voltage threshold is obtained by converting the high temperature threshold through a step linear relationship. If the resonant voltage is greater than the preset voltage threshold, it means that the temperature has reached the high temperature threshold, and therefore, an alarm message is output to provide a high temperature warning to protect the aerosol generating device.

[0199] In summary, the control method in the embodiment of the present application, starting from the energy demand characteristics of the aerosol-forming matrix during the baking process, divides the entire baking process into multiple time periods, and sets corresponding energy parameters (including multiple high-frequency drive pulses, corresponding to a certain energy) for each time period, so that the aerosol-forming matrix receives the heat output and transmission of the sensor in the induction heating component in time periods, and the aerosol generated after baking can quickly reach the inhalable state and maintain the inhalable state. This control method is relative to the conventional method of relying on the real-time temperature and temperature curve of the heater for control. On the one hand, starting from the energy demand characteristics of the aerosol-forming matrix during the baking process, the energy parameters of each time period (corresponding to a certain energy) are adapted to the characteristics of the baking process, and the energy supply is controlled in time periods, which can produce an aerosol with a good taste, and the amount of the aerosol can be maintained in an inhalable state, thereby improving the taste and suction physical examination. On the other hand, controlling the energy supply in time periods can get rid of the dependence on the temperature detection device, avoid the problem of insufficient or excessive heat absorption of the aerosol-forming matrix due to inaccurate temperature detection, and effectively reduce the hardware cost.

[0200] 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 separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0201] Through the description of the above implementation methods, ordinary technicians in this field can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Ordinary technicians in this field can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing related 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-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0202] 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. Under 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 changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. 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. A control method, applied to an aerosol generating device, characterized in that: The aerosol generating device comprises an induction heater assembly and a power source, wherein the induction heater assembly comprises an induction coil configured to generate a changing magnetic field when a changing current flows through the induction coil; a susceptor configured to be penetrated by the changing magnetic field generated by the induction coil to generate heat, thereby heating an aerosol-forming substrate to generate an aerosol, and the power source is used to provide energy to the induction heater assembly; The method comprises: After receiving the instruction to start heating, according to the mapping relationship between the time period and the energy parameter, the power supply is controlled to provide corresponding energy to the induction coil in a plurality of time periods respectively; The energy provided by the time period is composed of a plurality of high-frequency driving pulses, and the duration of the time period is greater than or equal to 500 ms.

2. The method according to claim 1, characterized in that The controlling the power supply to provide corresponding energy to the induction coil in the plurality of time periods respectively includes: In the current time period, controlling the power supply to continuously output a plurality of high-frequency driving pulses to provide energy to the induction coil; If the supplied energy reaches the set energy for the current time period, the power supply is controlled to stop supplying energy for the current time period and continue for a period of time.

3. The method according to claim 1, characterized in that The controlling the power supply to provide corresponding energy to the induction coil in the plurality of time periods respectively includes: In the current time period, controlling the power supply to continuously output a plurality of high-frequency driving pulses to provide energy to the induction coil; If the number of high-frequency driving pulses outputted reaches the preset number of pulses in the current time period, the power supply is controlled to stop supplying energy in the current time period and continue for a period of time.

4. The method according to claim 1, characterized in that: The controlling the power supply to provide corresponding energy to the induction coil in the plurality of time periods respectively includes: In the current time period, controlling the power supply to continuously output a plurality of high-frequency driving pulses to provide energy to the induction coil; If the total output duration of the high-frequency driving pulse reaches the preset output duration of the current time period, the power supply is controlled to stop the energy supply of the current time period and continue for a period of time.

5. The method according to any one of claims 2 to 4, characterized in that: Also includes: Determine the duration of the power supply stopping the energy supply in the current time period; If the duration meets the preset end time threshold of the current time period, the current time period ends, and the power supply is controlled to start outputting energy supply to the induction coil for the next time period.

6. The method according to any one of claims 2 to 4, characterized in that: Also includes: If the sum of the duration of the power supply continuously outputting multiple high-frequency drive pulses and the duration of the power supply stopping the energy supply of the current time period meets the preset time period length, the current time period ends, and the power supply is controlled to start outputting energy supply to the induction coil for the next time period.

7. The method according to any one of claims 2 to 4, characterized in that: The aerosol generating device further comprises a temperature sensor configured to determine a temperature of the susceptor; the method further comprising: Acquire the real-time temperature of the receptor detected by the temperature sensor; If the real-time temperature is less than or equal to the preset low temperature threshold, the current time period ends, and the power supply is controlled to start outputting energy supply for the next time period to the induction coil.

8. The method according to any one of claims 2 to 4, characterized in that: The method further comprises: obtaining a resonant voltage of the induction coil; If the resonant voltage is less than or equal to the preset low-voltage threshold, the current time period ends, and the power supply is controlled to start outputting energy supply to the induction coil for the next time period.

9. The method according to claim 1, characterized in that: After receiving the instruction to start heating, according to the mapping relationship between the time period and the energy parameter, respectively controlling the power supply to provide corresponding energy to the induction coil in a plurality of time periods, comprises: After receiving the heating start instruction, entering the heating stage, the heating stage includes a first time period; In the first time period, according to the mapping relationship between the first time period and the energy parameter, the power supply is controlled to provide corresponding energy to the induction coil in a maximum power manner.

10. The method according to claim 1, characterized in that After receiving the instruction to start heating, according to the mapping relationship between the time period and the energy parameter, respectively controlling the power supply to provide corresponding energy to the induction coil in a plurality of time periods, comprises: After receiving the instruction to start heating, entering the heat preservation stage, the heat preservation stage includes a plurality of second time periods; In a plurality of the second time periods, the power supply is controlled to provide corresponding energy to the induction coil according to the mapping relationship between the second time periods and the energy parameters.

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

12. The method according to claim 10, characterized in that The set energies of the multiple second time periods are the same; or, the set energies of at least two of the second time periods are different.

13. The method according to claim 10, characterized in that The duration of the second time period ranges from 1s to 2s.

14. The method according to claim 1, characterized in that After receiving the instruction to start heating, according to the mapping relationship between the time period and the energy parameter, respectively controlling the power supply to provide corresponding energy to the induction coil in a plurality of time periods, comprises: After receiving the instruction to start heating, entering the suction stage, the suction stage is provided with a plurality of third time periods; In the plurality of third time periods, the power supply is controlled to provide corresponding energy to the induction coil according to the mapping relationship between the third time periods and the energy parameters.

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

16. The method according to claim 14, characterized in that The set energies of the multiple third time periods are the same; or, the set energies of at least two of the third time periods are different.

17. The method according to claim 14, characterized in that The duration of the third time period is greater than 10 seconds.

18. The method according to claim 14, characterized in that The energy corresponding to at least one third time period located in the early stage of the inhalation phase is greater than the energy corresponding to at least one third time period located in the late stage of the inhalation phase.

19. The method according to claim 14, characterized in that During the inhalation phase, the temperature difference between the highest temperature and the lowest temperature of the real-time temperature of the susceptor ranges from 10°C to 50°C.

20. The method according to claim 1, characterized in that In the single time period, the real-time temperature of the susceptor gradually increases and then gradually decreases.

21. The method according to claim 1, characterized in that Also includes: obtaining a resonant voltage of the induction coil; Wherein, within a single time period, the resonant voltage of the induction coil gradually increases and then gradually decreases.

22. The method according to claim 1, characterized in that Also includes: obtaining a resonant voltage of the induction coil; If the resonant voltage is greater than a preset voltage threshold, an alarm message is output.

23. An aerosol generating device, characterized in that: include: an induction heater assembly, comprising an induction coil and a susceptor, the induction coil being configured to generate a varying magnetic field when a varying current flows therethrough, the susceptor being configured to be penetrated by the varying magnetic field generated by the induction coil to generate heat, thereby heating an aerosol-forming substrate to generate an aerosol; a power source for providing energy to the induction heater assembly; A controller, wherein the controller is connected to the induction heater assembly and the power supply, and is used to execute the control method according to any one of claims 1 to 22.

24. The aerosol generating device according to claim 23, characterized in that The induction coil includes a resonant circuit and a half-wave rectifier circuit. The resonant circuit includes an induction coil and a capacitor connected in series. The half-wave rectifier circuit is connected to the capacitor and is used to perform half-wave rectification on the voltage signal of the capacitor to output the resonant voltage of the induction coil.

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