Heating method based on aerosol generating device and aerosol generating device

Abstract

The invention discloses a heating method based on an aerosol generating device and the aerosol generating device. The aerosol generating device comprises an induction coil, a susceptor for heating an aerosol generating substrate to generate aerosol, a capacitive circuit, a controller and a power supply for supplying power to the induction coil. The heating method comprises the following steps: determining a current time phase of the aerosol generating device; according to the current time stage of the aerosol generating device, the capacitance value of the capacitive circuit is adjusted to correspond to the preset capacitance value of the current time stage; wherein after the induction coil and the capacitive circuit with the adjusted capacitance value generate resonance, the induction coil generates a stable changing magnetic field, so that the sensing body generates eddy current in the changing magnetic field to increase the temperature. In this way, the energy consumption of the aerosol generating device in the using process can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol, and particularly to a heating method based on an aerosol generating device and an aerosol generating device. Background Art

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

[0003] An example of such a product is a heating device that releases compounds by heating rather than burning materials. For example, the material can be an aerosol generating article containing tobacco or other non-tobacco products, and these non-tobacco products may or may not contain nicotine. In known heating devices, a changing magnetic field is generated by an induction coil, and eddy currents are generated in a susceptor in the changing magnetic field to heat the aerosol generating article. However, there is still a relatively large energy consumption during the use of this heating form at present. Summary of the Invention

[0004] Embodiments of the present application provide a heating method based on an aerosol generating device and an aerosol generating device, which can reduce the energy consumption during the use of the aerosol generating device.

[0005] Embodiments of the present application provide a heating method based on an aerosol generating device. The aerosol generating device includes an induction coil, a susceptor for heating an aerosol generating substrate to generate an aerosol, a capacitive circuit, a controller, and a power supply for supplying power to the induction coil. The heating method includes:

[0006] Determine the current time stage of the aerosol generating device;

[0007] According to the current time stage of the aerosol generating device, adjust the capacitance value of the capacitive circuit to make it correspond to the preset capacitance value of the current time stage;

[0008] Wherein, after resonance occurs between the induction coil and the capacitive circuit with the adjusted capacitance value, a stable changing magnetic field is generated in the sensing coil, so that eddy currents are generated in the susceptor in the changing magnetic field to increase the temperature.

[0009] In some embodiments, according to the current time stage of the aerosol generating device, adjusting the capacitance value of the capacitive circuit to make it correspond to the current time stage includes:

[0010] When the current time stage is the first time stage, adjust the capacitance value of the capacitive circuit so that the capacitance value of the capacitive circuit remains at the maximum capacitance value, where the first time stage is the stage when the temperature of the susceptor increases from the initial temperature to the first temperature.

[0011] In some embodiments, adjusting the capacitance value of the capacitive circuit according to the current time phase of the aerosol generating device so that it corresponds to the current time phase includes:

[0012] When the current time phase is the second time phase, adjusting the capacitance value of the capacitive circuit so that the capacitance value of the capacitive circuit is reduced below the maximum capacitance value, where the second time phase is the phase between reaching the first temperature and sending out a puff start signal, and within the second time phase, the temperature of the susceptor drops below the first temperature.

[0013] In some embodiments, adjusting the capacitance value of the capacitive circuit according to the current time phase of the aerosol generating device so that it corresponds to the current time phase further includes:

[0014] When the current time phase is the third time phase, adjusting the capacitance value of the capacitive circuit so that the capacitance value of the capacitive circuit is reduced below the maximum capacitance value, where the third time phase is the phase of generating aerosol, and within the third time phase, the temperature of the susceptor drops below the first temperature and is within a preset temperature range.

[0015] In some embodiments, the third time phase includes multiple energy supply time periods, and the heating method further includes:

[0016] During the energy supply time period, after the induction coil resonates with the capacitive circuit after adjusting the capacitance value, the sensing coil generates a stable changing magnetic field, so that eddy currents are generated in the susceptor in the changing magnetic field to increase the temperature;

[0017] Wherein, a natural cooling time period is set between at least some adjacent energy supply time periods.

[0018] In some embodiments, the heating method further includes:

[0019] During the natural cooling time period, determining the temperature of the susceptor, and according to the temperature of the susceptor, determining to end the current natural cooling time period and enter the next energy supply time period; and / or,

[0020] During the energy supply time period, determining the temperature of the susceptor, and according to the temperature of the susceptor, determining to end the current energy supply time period and enter the next natural cooling time period.

[0021] In some embodiments, the heating method further includes:

[0022] During the energy supply time period, determining the energy supply duration, and according to the energy supply duration, determining to end the current energy supply time period and enter the next natural cooling time period; and / or,

[0023] During the natural cooling time period, determine the natural cooling duration. Based on the natural cooling duration, determine to stop the current natural cooling time period and enter the next energy supply time period.

[0024] In some embodiments, when the current time stage is the third time stage, adjust the capacitance value of the capacitive circuit so that the capacitance value of the capacitive circuit is reduced below the maximum capacitance value, including:

[0025] When the current time stage is the third time stage, adjust the capacitance value of the capacitive circuit at least once so that the energy supply amount or the energy supply speed changes during the adjusted energy supply time period.

[0026] In some embodiments, the capacitive circuit includes N capacitive branches connected in parallel. At least N - 1 of the N capacitive branches include switches, any one of the N capacitive branches includes a capacitor, and the switch of any one of the N capacitive branches is connected in series with the capacitor, where N is an integer greater than or equal to 2; adjusting the capacitance value of the capacitive circuit includes:

[0027] Adjust the number of switches turned off in at least N - 1 capacitive branches.

[0028] In some embodiments, the capacitive circuit includes at least M - 1 switches and M capacitors. The M capacitors are connected in series in sequence, and each of at least M - 1 capacitors is connected in parallel with a switch, where M is an integer greater than or equal to 2; adjusting the capacitance value of the capacitive circuit includes:

[0029] Adjust the number of switches turned off in at least M - 1 switches.

[0030] In some embodiments, the time stage includes a first time stage and a third time stage. The first time stage is when the temperature of the receptor increases from the initial temperature to the first temperature, and the third time stage is when the temperature of the receptor drops below the first temperature and within a preset temperature range; according to the current time stage of the aerosol generating device, adjust the capacitance value of the capacitive circuit so that it corresponds to the preset capacitance value of the current time stage, including:

[0031] When the current time stage is the first time stage, correspondingly control all switches to close so that the capacitance value of the capacitive circuit reaches the maximum capacitance value; when the current time stage of the aerosol generating device is the third time stage, correspondingly control at least some switches to open so that the capacitance value of the capacitive circuit is less than the maximum capacitance value.

[0032] In some embodiments, according to the current time stage of the aerosol generating device, adjust the capacitance value of the capacitive circuit, including:

[0033] Adjust the capacitance value and output voltage of the capacitive circuit according to the current time stage of the aerosol generating device so that they correspond to the preset capacitance value and preset voltage of the current time stage.

[0034] An embodiment of the present application further provides an aerosol generating device, including:

[0035] An induction coil for generating a changing magnetic field;

[0036] A susceptor, which is arranged inside the aerosol generating device or inside the aerosol generating substrate, and is configured to generate eddy currents and heat up in the changing magnetic field, thereby heating the aerosol generating substrate to generate aerosol;

[0037] A power supply and a capacitive circuit, the induction coil is electrically connected between the power supply and the capacitive circuit, and the capacitive circuit is configured to resonate with the induction coil when the power supply is powered on so that the energy stored in the induction coil is equal to the energy stored in the capacitive circuit. Wherein, the capacitive circuit includes at least two capacitors and at least one switch, and the at least two capacitors and the at least one switch are electrically connected;

[0038] A controller, the controller is electrically connected to at least one switch, and the controller is used to execute the heating method as described above.

[0039] In some embodiments, the capacitive circuit includes N capacitive branches connected in parallel, at least N - 1 of the N capacitive branches include switches, and any one of the N capacitive branches includes a capacitor, where N is an integer greater than or equal to 2;

[0040] The switch and the capacitor of any one of the at least N - 1 capacitive branches are connected in series.

[0041] In some embodiments, the capacitive circuit includes at least M - 1 switches and M capacitors, where M is an integer greater than or equal to 2;

[0042] The M capacitors are connected in series in sequence, and each of at least M - 1 capacitors is connected in parallel with a switch.

[0043] The heating method based on the aerosol generating device provided in the embodiment of the present application includes determining the current time stage of the aerosol generating device, and adjusting the capacitance of the capacitive circuit according to the current time stage of the aerosol generating device so that it corresponds to the preset capacitance of the current time stage. Among them, after the induction coil resonates with the capacitive circuit after the capacitance is adjusted, the sensing coil generates a stable changing magnetic field so that the sensing body generates eddy currents in the changing magnetic field and heats up. Therefore, when the power is turned on, the capacitance of the capacitive circuit can be adjusted in a targeted manner in different working stages of the aerosol generating device to adjust the amount of energy stored in the induction coil, thereby meeting the energy requirements of different working stages to prevent energy waste, in other words, to achieve the purpose of reducing the energy consumption during the use of the aerosol generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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.

[0045] Figure 1 A schematic diagram of the structure of an aerosol generating device provided in an embodiment of the present application;

[0046] Figure 2 A schematic diagram of the structure of another aerosol generating device provided in an embodiment of the present application;

[0047] Figure 3 A schematic diagram of a capacitive circuit according to an embodiment of the present application;

[0048] Figure 4 A schematic diagram of a circuit structure of a capacitive circuit provided in an embodiment of the present application;

[0049] Figure 5 A schematic diagram of the circuit structure of another capacitive circuit provided in an embodiment of the present application;

[0050] Figure 6 A flow chart of a heating method for an aerosol generating device provided in an embodiment of the present application;

[0051] Figure 7 A schematic diagram of the temperature change of a susceptor over time provided in an embodiment of the present application;

[0052] Figure 8 Another schematic diagram of the temperature change of the susceptor over time provided in an embodiment of the present application;

[0053] Figure 9 Another schematic diagram of the temperature variation of a susceptor over time provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0055] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the aerosol generating device provided by the embodiment of this application. As Figure 1 shown, the aerosol generating device 100 includes a receiving cavity having an opening 10, and an aerosol generating substrate 20, such as a cigarette, is removably received in the receiving cavity through the opening 50.

[0056] Among them, the aerosol generating substrate 20 can be a tobacco-containing material that releases volatile compounds from the substrate when heated; or it can also be a non-tobacco material that is suitable for electrically heated smoking after heating. The aerosol generating substrate 20 can also be a solid substrate, which can include one or more of powder, granule, fragment, strip, or sheet of vanilla leaf, tobacco leaf, homogenized tobacco, expanded tobacco, etc.; or the solid substrate can contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

[0057] The aerosol generating device 100 further includes a susceptor 30, which is prepared from a soft magnetic alloy material with a Curie temperature not lower than 350 °C; the preparation materials of the susceptor 30 are, for example, stainless steel, iron-nickel alloy, iron-aluminum alloy, etc.; in use, the susceptor 30 can generate eddy currents and heat in a changing magnetic field, and then heat the aerosol generating substrate 20 to generate aerosol. Among them, the susceptor 30 can include an elongated rod-shaped portion and a tapered portion. When the cigarette is received in the receiving cavity, the tapered portion of the susceptor 30 can be inserted into the aerosol generating substrate 20 for heating, so that some active substances in the aerosol generating substrate 20 are heated and volatilized to generate aerosol. In another embodiment, the susceptor 30 can also be disposed inside the aerosol generating substrate 20.

[0058] The aerosol generating device 100 further includes an induction coil 40. The induction coil 40 is a common solenoid coil for generating a changing magnetic field. In some embodiments, the induction coil 40 can also be a flat coil with a square cross-sectional shape. In use, conductive pins are provided on the induction coil 40 and connected to the circuit 60 through the conductive pins, thereby guiding a changing current to the induction coil 40. In practice, the material of the induction coil 40 is preferably a good conductor material with a low resistivity and a heat resistance higher than 500 °C, such as silver, copper, aluminum, nickel, etc., to improve the quality factor Q value of the LC oscillator formed after coupling to the circuit 60. Also, the lead material of the conductive pins of the induction coil 40 is preferably a high electrical conductivity metal material with a heat resistance higher than 400 °C, such as nickel, silver, etc. The induction coil 40 has approximately 6 to 15 turns and a length of approximately 8 to 15 mm. After assembly, the induction coil 40 surrounds or encircles the receiving cavity. The cross-section of the wire material of the induction coil 40 is in a rectangular shape. Specifically, in the cross-section of the wire material of the induction coil 40, the dimension in the axial direction is greater than the dimension in the radial direction, thereby making the wire material of the induction coil 40 in a flat shape.

[0059] The aerosol generating device 100 further includes a power source 50. The power source 50 is a rechargeable DC battery and can output a DC current. In some embodiments, the DC supply voltage provided by the power source 50 is in the range of about 2.5V to about 9.0V, and the amperage of the DC current that the power source 50 can provide is in the range of about 2.5A to about 20A.

[0060] The aerosol generating device 100 further includes a circuit 60. The circuit 60 is appropriately electrically connected to the rechargeable power source 50 and is used to convert the DC current output by the power source 50 into an alternating current with a suitable frequency and then supply it to the induction coil 40, so that the induction coil 40 generates a changing magnetic field. In some embodiments, the frequency of the alternating current supplied by the circuit 60 to the induction coil is between 80KHz and 400KHz. More specifically, the frequency can be in the range of about 200KHz to 300KHz.

[0061] In some embodiments, the circuit 60 includes a capacitive circuit and a controller. Among them, the capacitive circuit can resonate with the induction coil 40 when the power source 50 is powered on, and the controller is used to adjust the capacitance value of the capacitive circuit. In other embodiments, the circuit 60 further includes a boost circuit. The boost circuit is electrically connected between the power source 50 and the induction coil 40, and the boost circuit is used to boost the voltage of the power source 50 and then input it to the induction coil 40.

[0062] Among them, the controller can execute the heating method based on the aerosol generating device in any embodiment of the present application. The controller can adopt a microcontroller unit (MCU) or a digital signal processing (DSP) controller, etc.

[0063] It should be noted that, as Figure 1 shown, the hardware structure of the aerosol generating device 100 is only an example, and the aerosol generating device 100 may have more or fewer components than those shown in the figure, two or more components may be combined, or different component configurations may be provided. The various components shown in the figure may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and / or application specific integrated circuits.

[0064] For example, Figure 2 an aerosol generating device 100 adopting another heating method is exemplarily shown. As Figure 2 shown, in this embodiment, the receptor 30 is a hollow structure, specifically a hollow tubular body. The induction coil 40 surrounds the receptor 30.

[0065] When the aerosol generating substrate 20 (such as a cigarette stick) is received in the hollow structure, the receptor 30 heats the aerosol generating substrate 20 in the circumferential direction, so that part of the active substances in the aerosol generating substrate 20 are heated and volatilized to generate aerosol. Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of the capacitive circuit provided by the embodiment of the present application.

[0066] As Figure 3 shown, the induction coil 40 is electrically connected between the power supply 50 and the capacitive circuit 61. The capacitive circuit 61 includes at least two capacitors 611 and at least one switch 612, and the at least two capacitors 611 and the at least one switch 612 are electrically connected.

[0067] Among them, in this embodiment, taking the at least two capacitors 611 including the first capacitor C1, the second capacitor C2,..., the Kth capacitor CK as an example, and taking the at least one switch 612 including the first switch S1, the second switch S2,..., the Ith switch SI as an example. Wherein, K is an integer ≥2, and I is an integer ≥1. The capacitive circuit 61 is configured to resonate with the induction coil 40 when the power supply 50 is powered on, so that the energy stored in the induction coil 40 (i.e., the energy input to the induction coil 40) is equal to the energy stored in the capacitive circuit 61.

[0068] The controller 62 is electrically connected to at least one switch 612, that is, the controller 62 is electrically connected to the first switch S1, the second switch S2, ..., and the first switch S1, respectively. The controller 62 is used to control the closing or opening of each switch in the at least one switch to adjust the capacitance of the capacitive circuit 61. That is, the controller 62 can control the closing or opening of the first switch S1, the second switch S2, ..., and the first switch S1 to adjust the capacitance of the first capacitor C1, the second capacitor C2, ..., and the Kth capacitor CK. Since the first capacitor C1, the second capacitor C2, ..., and the Kth capacitor CK resonate with the induction coil 40 when the power supply 50 is powered on, the energy stored in the induction coil 40 is equal to the energy stored in the first capacitor C1, the second capacitor C2, ..., and the Kth capacitor CK. At the same time, the energy stored in the first capacitor C1, the second capacitor C2, ..., and the Kth capacitor CK after the combination is determined by the capacitance of the whole, so by adjusting the capacitance of the first capacitor C1, the second capacitor C2, ..., and the Kth capacitor CK after the combination is combined, the energy stored in the first capacitor C1, the second capacitor C2, ..., and the Kth capacitor CK after the combination is combined can be adjusted, and then the purpose of adjusting the energy stored in the induction coil 40 is achieved. Based on this, by configuring the induction coil 40 and the capacitive circuit to resonate, the input energy of the induction coil 40 can be adjusted by adjusting the capacitance of the capacitive circuit, and the total energy during the use of the aerosol generating device 100 can be reduced, thereby achieving the purpose of reducing the energy consumption during the use of the aerosol generating device 100.

[0069] That is to say, through the above method, the capacitance of the capacitive circuit can be specifically adjusted in different working stages of the aerosol generating device 100 to adjust the amount of energy stored in the induction coil, thereby adjusting the energy output to the sensor 30, so that the sensor 30 has corresponding energy input in different working stages of the aerosol generating device 100, which can reduce energy waste. In other words, the purpose of reducing the energy consumption during the use of the aerosol generating device is achieved.

[0070] It should be noted that, in some embodiments, each switch (such as the first switch) can be configured as at least one of a relay, a triode or a metal oxide semi-conductor field effect transistor. Of course, in other embodiments, each switch can also be configured as any other controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.

[0071] Please refer to Figure 4 , Figure 4 A circuit structure of the capacitive circuit 61 is shown as an example.

[0072] As shown Figure 4 in FIG. 1, the capacitive circuit 61 includes N capacitive branches connected in parallel. At least N - 1 of the N capacitive branches include switches, and any one of the N capacitive branches includes a capacitor, where N is an integer greater than or equal to 2. The N capacitive branches include a first capacitive branch B1, a second capacitive branch B2, …, and an Nth capacitive branch BN. The first capacitive branch B1 includes a first capacitor C1; the second capacitive branch B2 includes a second capacitor C2 and a first switch S1; the third capacitive branch B3 includes a third capacitor C3 and a second switch S2, …, and the Nth capacitive branch BN includes an Nth capacitor CN and an (N - 1)th switch SN-1.

[0073] Among them, the switch and the capacitor of any one of at least N - 1 capacitive branches are connected in series. That is, the second capacitor C2 is connected in series with the first switch S1; the third capacitor C3 is connected in series with the second switch S2, …, and the Nth capacitor CN is connected in series with the (N - 1)th switch SN-1.

[0074] Moreover, the first switch S1, the second switch S2, …, and the (N - 1)th switch SN-1 are all controlled by the controller 62. When the controller 60 controls any switch to close, the capacitor connected to the closed switch is related to the capacitance value of the capacitive branch 61; conversely, when the controller 60 controls any switch to open, the capacitor connected to the open switch is irrelevant to the capacitance value of the capacitive branch 61. For example, assume that the controller 60 controls the first switch S1 to close and controls the second switch S2 to the (N - 1)th switch SN-1 to open, then the capacitance value of the capacitive branch 61 is the capacitance value after the first capacitor C1 and the second capacitor C2 are connected in parallel. Thus, it can be seen that by controlling the closing or opening of the first switch S1, the second switch S2, …, and the (N - 1)th switch SN-1, the controller 62 can achieve the purpose of adjusting the capacitance value of the capacitive branch 61.

[0075] It can be understood that in this embodiment, the capacitive branch 61 includes N capacitors and N - 1 switches as an example. In other embodiments, the corresponding number of capacitors and switches can also be set as needed, and the embodiments of the present application do not make specific limitations on this.

[0076] Please refer to Figure 5 , Figure 5 which exemplarily shows another circuit structure of the capacitive circuit 61.

[0077] As shown Figure 5 in FIG. 2, the capacitive circuit includes at least M - 1 switches and M capacitors, where M is an integer greater than or equal to 2. At least M - 1 switches include a first switch S1, a second switch S2, …, and an (M - 1)th switch SM-1. The M capacitors include a first capacitor C1, a second capacitor C2, …, and an Mth capacitor CM.

[0078] Among them, M capacitors are connected in series in sequence, and each of at least M - 1 capacitors is connected in parallel with a switch. The first capacitor C1, the second capacitor C2, …, the Mth capacitor CM are connected in series in sequence. The second capacitor C2 is connected in parallel with the first switch S1; the third capacitor C3 is connected in parallel with the second switch S2, …, the Mth capacitor CM is connected in parallel with the (M - 1)th switch SM - 1.

[0079] Moreover, the first switch S1, the second switch S2, …, the (M - 1)th switch SM - 1 are all controlled by the controller 62. When the controller 60 controls any switch to close, the capacitance of the capacitor connected to the closed switch has nothing to do with the capacitance value of the capacitive branch 61; on the contrary, when the controller 60 controls any switch to open, the capacitance of the capacitor connected to the open switch is related to the capacitance value of the capacitive branch 61. For example, assume that the controller 60 controls the first switch S1 to open, and controls the second switch S2 to the (M - 1)th switch SM - 1 to close, then the capacitance value of the capacitive branch 61 is the capacitance value after the first capacitor C1 and the second capacitor C2 are connected in series. Thus, it can be seen that by controlling the closing or opening of the first switch S1, the second switch S2, …, the (M - 1)th switch SM - 1, the controller 62 can achieve the purpose of adjusting the capacitance value of the capacitive branch 61.

[0080] It can be understood that in this embodiment, an example is given where the capacitive branch 61 includes M capacitors and M - 1 switches. In other embodiments, the corresponding number of capacitors and switches can also be set as needed, and the embodiments of the present application do not make specific limitations on this.

[0081] In some embodiments, the capacitance values of the capacitors in the capacitive branch 61 are equal. By setting the capacitance values of the capacitors in the capacitive branch 61 to be equal, the energy input to the corresponding induction coil 40 is the same for each capacitor, which is convenient for configuring the number of switches that need to be disconnected.

[0082] Please refer to Figure 6 , Figure 6 which is the flowchart of the heating method based on the aerosol generating device provided by the embodiments of the present application. Among them, the aerosol generating device includes an induction coil, a susceptor for heating an aerosol generating substrate to generate an aerosol, a capacitive circuit, a controller, and a power supply for supplying power to the induction coil. In some embodiments, the aerosol generating device can refer to the detailed description for Figures 1-5 and will not be elaborated here.

[0083] As Figure 6 shown, the heating method based on the aerosol generating device includes the following steps:

[0084] Step S601: Determine the current time stage of the aerosol generating device.

[0085] The controller can obtain the current time stage of the aerosol generating device 100 according to the temperature feedback by the temperature sensing element. For example, when the temperature of the susceptor 30 feedback by the temperature sensing element has not reached the first temperature, the controller can determine that the aerosol generating device 100 is currently in the first time stage; when the temperature feedback by the temperature sensing element is below the first temperature and outside the preset temperature range in the third time stage, the controller can determine that the aerosol generating device 100 is currently in the second time stage; when the temperature of the susceptor 30 feedback by the temperature sensing element is within the preset temperature range in the third time stage, the controller can determine that the aerosol generating device 100 is currently in the third time stage.

[0086] Alternatively, in some embodiments, the aerosol generating device 100 can also determine the current time stage it is in by the heating duration. The aerosol generating device 100 usually presets a first duration for the first time stage and a second duration for the second time stage. The first duration and the second duration can vary according to the different aerosol generating matrix 20 or the internal structure of the aerosol generating device 100.

[0087] When the heating duration is within the first duration range, the controller can determine that the aerosol generating device 100 is currently in the first time stage; when the heating duration is within the second duration range, the controller can determine that the aerosol generating device 100 is currently in the second time stage; when the heating duration exceeds the second duration, the controller can determine that the aerosol generating device 100 is currently in the third time stage.

[0088] Step S602: According to the current time stage of the aerosol generating device, adjust the capacitance value of the capacitive circuit to make it correspond to the current time stage.

[0089] Step S603: After the induction coil and the capacitive circuit with the adjusted capacitance value resonate, the sensing coil generates a stable changing magnetic field, so that eddy currents are generated in the susceptor in the changing magnetic field to heat up.

[0090] In one embodiment, the specific implementation process of adjusting the capacitance value of the capacitive circuit to make it correspond to the current time stage of the aerosol generating device in step S602 includes the following steps: when the aerosol generating device 100 is in the first time stage, adjust the capacitance value of the capacitive circuit so that the capacitance value of the capacitive circuit remains at the maximum capacitance value, where the first time stage is the stage when the temperature of the susceptor 30 increases from the initial temperature to the first temperature.

[0091] The initial temperature is the temperature of the receptor 30 when the aerosol generating device 100 starts to work, and the first temperature is a preset temperature. The aerosol generating device 100 may be provided with a temperature sensing element to detect the temperature of the receptor 30. The first temperature may be the highest temperature in the entire heating process, so that the aerosol generating matrix 20 can be preheated quickly; of course, the first temperature may also be set accordingly according to other needs.

[0092] When the aerosol generating device 100 is in the first time stage, the controller may control Figure 4 All switches in the control are closed, or the control Figure 5 All switches in the circuit are closed, so that the capacitance of the capacitive circuit 61 is maximized, and then the energy input to the induction coil 40 is maximized, and the energy obtained by the susceptor 30 is also maximized, so that the susceptor 30 is quickly heated to the first temperature under the action of the eddy current. The first time stage can also be called the preheating stage. After the preheating stage is completed, the temperature of the susceptor 30 reaches the first temperature.

[0093] In some embodiments, the specific implementation process of adjusting the capacitance of the capacitive circuit to correspond to the current time stage according to the current time stage of the aerosol generating device in step S602 includes the following steps: when the aerosol generating device is in the second time stage, adjusting the capacitance of the capacitive circuit to reduce the capacitance of the capacitive circuit to below the maximum capacitance, wherein the second time stage is the stage between reaching the first temperature and sending the inhalation start signal, and within the second time stage, the temperature of the receptor is usually reduced to below the first temperature, which can avoid the aerosol generating matrix 20 from being over-baked and provide sufficient time for the aerosol generating matrix 20 to absorb heat from the receptor 30 and reach a temperature sufficient to generate aerosol.

[0094] The puff start signal is a signal that the aerosol generating device 100 feeds back to the user to start puffing. For example, if a buzzer is provided in the aerosol generating device 100, the puff start signal is the buzzing sound of the buzzer. After the first time stage is over, if the user hears the buzzing sound of the buzzer, it means that the user can start puffing; alternatively, a vibration motor may be provided in the aerosol generating device 100, and the puff start signal is the vibration of the vibration motor. After the first time stage is over, if the user feels the aerosol generating device 100 vibrating, it means that the user can start puffing.

[0095] During the second time period, the controller can control Figure 4 At least one switch is open, or the control Figure 5At least one switch is closed, so that the capacitance value of the capacitive circuit 61 is less than the maximum capacitance value in the first stage, and the energy obtained by the susceptor 30 is also less than the energy obtained by the susceptor 30 in the first time stage. Since the energy obtained by the susceptor 30 decreases, the temperature of the susceptor 30 starts to drop below the first temperature at this time, so that the temperature inside and outside the aerosol-forming substrate 20 gradually becomes uniform. In the first time stage, due to the large energy of the susceptor 30, the temperature of the susceptor 30 quickly rises to the first temperature. At this time, when the susceptor 30 heats the aerosol-forming substrate 20, the outer surface temperature of the aerosol-forming substrate 20 will be relatively high, while the temperature inside the aerosol-forming substrate 20 has not reached the ideal temperature. By making the internal temperature of the aerosol-forming substrate 20 gradually increase in the second time stage, the temperature inside and outside the aerosol-forming substrate 20 can be made uniform.

[0096] In some embodiments, the specific implementation process of adjusting the capacitance value of the capacitive circuit according to the current time stage of the aerosol generating device in step S602 to make it correspond to the current time stage includes the following steps: when the aerosol generating device 100 is in the third time stage, adjust the capacitance value of the capacitive circuit 61 so that the capacitance value of the capacitive circuit 61 is reduced below the maximum capacitance value, where the third time stage is the stage of generating aerosol. Generally, in the third time stage, the temperature of the susceptor drops below the first temperature and within a preset temperature range.

[0097] The stage of generating aerosol is also the stage when the user can use the aerosol-forming substrate 20 for suction, that is, the stage after the user receives the suction start signal. When the temperature in the second time stage drops to the preset temperature range in the third time stage, the controller can control the above buzzer or vibration motor to work to generate a suction start signal.

[0098] In this stage, the temperature of the susceptor 30 can be maintained at a single preset temperature value within a certain temperature range, or can be maintained at multiple preset temperature values within a certain temperature range in stages. In another embodiment, in this stage, the temperature of the susceptor 30 can also fluctuate within a preset temperature range to maintain the temperature of the aerosol-forming substrate 20 within a certain temperature range. Generally, at this time, the temperature on the susceptor 30 is lower than the first temperature. Within this preset temperature range, heating the aerosol-forming substrate 20 by the susceptor 30 can generate an aerosol with a better taste. Since in the third time stage, the interior of the aerosol-forming substrate 20 already has a certain temperature, the power supply 50 only needs to provide a relatively small power to maintain the temperature of the aerosol-forming substrate 20 within the corresponding temperature range. Therefore, by adjusting the capacitance value of the capacitive circuit 61, the capacitive circuit 61 can have a relatively small capacitance value, so that the energy input by the induction coil 40 is also relatively small, so that the power supply 50 outputs a relatively small power to maintain the temperature of the aerosol-forming substrate 20 within the corresponding temperature range. Of course, in the case of other heating requirements, the temperature of the susceptor 30 can also be higher than the first temperature.

[0099] In some embodiments, when entering the third time stage, the capacitance value of the capacitive circuit 61 can be not adjusted, that is, the preset capacitance value in the third time stage can be the same as some of the preset capacitance values in the second time stage.

[0100] In summary, in the first time stage, the aerosol-forming substrate 20 needs to quickly absorb a large amount of heat to quickly increase its temperature. By the third time stage, the aerosol-forming substrate 20 already has a certain temperature and is in a state of generating aerosol. At this time, the aerosol-forming substrate 20 no longer needs to absorb a large amount of heat, and only needs to supplement a little heat to maintain it within a certain temperature range. If a large amount of heat is provided at this time to make the susceptor 30 generate heat, but the aerosol-forming substrate 20 absorbs not much heat, resulting in most of the heat being dissipated outward and wasted. However, by the method in this embodiment, the capacitance value of the capacitive circuit 61 can be adjusted according to the corresponding time stage in which the aerosol generating device 100 is currently located to provide corresponding energy, which can avoid heat dissipation and waste, that is, reduce power consumption.

[0101] In one embodiment, the third time stage includes multiple energy supply time periods, and a natural cooling time period is set between at least some adjacent energy supply time periods.

[0102] In the energy supply period, after the induction coil resonates with the capacitive circuit after adjusting the capacitance, the sensing coil generates a stable changing magnetic field, so that the sensing body 30 generates eddy currents in the changing magnetic field and heats up. The energy supply period is a stage in which the temperature of the sensing body 30 rises by providing energy to the sensing body 30. The natural cooling period is a stage in which the temperature of the sensing body 30 decreases by stopping the power supply or reducing the energy provided to the sensing body 30. The temperature of the sensing body 30 is adjusted by setting the energy supply period and the natural cooling period, so that the temperature of the sensing body 30 is kept within a preset temperature range to maintain a better suction effect.

[0103] In some embodiments, a process for setting an energy supply time period and a natural cooling time period to adjust the temperature of the sensor 30 is provided. Specifically, the heating method also includes the following steps: in the natural cooling time period, determining the temperature of the sensor, and according to the temperature of the sensor, determining to end the current natural cooling time period and enter the next energy supply time period.

[0104] Among them, it is determined that the temperature of the sensor 30 corresponding to the end of the current natural cooling time period is the low temperature threshold of the preset temperature range in the third time stage. In summary, in the natural cooling time period, when the temperature of the sensor 30 gradually decreases to the low temperature threshold of the preset temperature range, the energy supply time period is entered, and energy is provided to the sensor 30 so that the temperature of the sensor 30 gradually rises. When the temperature rises to the high temperature threshold of the preset temperature range, or when the energy output reaches the energy set in the current energy supply time period, or when the fixed power output is used, it can be determined whether the current energy supply duration reaches the preset duration, and then the next natural cooling time period is entered. In this way, the natural cooling time period and the energy supply time period are switched alternately, so that the temperature of the sensor 30 is kept within the preset temperature range to maintain a better suction effect.

[0105] In some embodiments, a process for setting an energy supply time period and a natural cooling time period to adjust the temperature of the sensor 30 is provided. Specifically, the heating method also includes the following steps: within the energy supply time period, determining the energy supply duration, and determining to end the current energy supply time period and enter the next natural cooling time period based on the energy supply duration; and / or, during the natural cooling time period, determining the natural cooling duration, and determining to stop the current natural cooling time period and enter the next energy supply time period based on the natural cooling duration.

[0106] Among them, the energy supply duration and the natural cooling duration are both pre-set durations, and both can be set based on the actual application scenario, and the embodiments of the present application do not impose specific restrictions on this. Specifically, in the natural cooling time period, the temperature of the sensor 30 gradually decreases from the natural cooling time period until the natural cooling time period ends, and then enters the energy supply time period, the energy supply time period starts and energy is provided to the sensor 30 so that the temperature of the sensor 30 gradually rises, until the energy supply time period ends and enters the natural cooling time period again. In this way, there is no need to monitor the real-time temperature of the sensor 30, and the natural cooling time period and the energy supply time period can be alternately switched, so that the temperature of the sensor 30 is kept within the preset temperature range to maintain a better suction effect.

[0107] In some embodiments, the first time period or the second time period may also include multiple energy supply time periods, wherein a natural cooling time period is set between at least some adjacent energy supply time periods. The switching rules between the energy supply time period and the natural cooling time period may refer to the above embodiments.

[0108] In some embodiments, the heating method further includes: when the current time stage is the third time stage, adjusting the capacitance of the capacitive circuit at least once so that the energy supply amount and / or the energy supply speed changes within the energy supply time period after the adjustment.

[0109] Specifically, when entering the third time stage, the capacitance of the capacitive circuit 61 can be adjusted once to reduce the capacitance of the capacitive circuit 61, so that the energy input by the induction coil 40 is also smaller, so that the power supply 50 outputs a smaller power to maintain the temperature of the aerosol generating matrix 20, and then during the energy supply period of the entire third time stage, the capacitance of the capacitive circuit 61 remains unchanged, that is, the capacitance of the capacitive circuit 61 is adjusted only once in the third time stage.

[0110] like Figure 8 In the temperature curve shown in FIG. 1 , the first time stage is from time T0 to time T1, the second time stage is from time T1 to time T2, the third time stage is entered after time T2, and the energy supply time periods from time T3 to time T4, from time T5 to time T6, ..., from time Tk to time Tk+1 are all the energy supply time periods of the third time stage. In these energy supply time periods, the capacitance value of the capacitive circuit 61 remains unchanged, that is, the capacitance value of the capacitive circuit 61 is not adjusted in each energy supply time period, so from Figure 8It can be seen from the temperature curve in that when the capacitance value of the capacitive circuit 61 remains unchanged during the energy supply period, and the energy supply duration is the same, the energy supply speed is basically the same in each energy supply period from time T3 to T4, from time T5 to T6, and until time Tk to Tk+1; further, when the timing of starting the energy supply is the same, the maximum temperature Tmax reached after the energy supply is also basically the same.

[0111] Alternatively, in some embodiments, the capacitance value of the capacitive circuit 61 can be adjusted multiple times in the third time stage.

[0112] For example, in the third time stage, according to requirements, the number of switches turned off can be adjusted to adjust the energy input to the induction coil 40, and further adjust the supply rate and / or supply duration of different energy supply periods. Specifically, the third time stage can be divided into multiple periods, and the number of switches turned off can be adjusted accordingly in different periods to change the supply rate and / or supply duration of the energy supply periods in different periods, such as first fast then slow, or first slow then fast, or gradually slow down, or gradually speed up, or slow-fast-slow-fast; or fast-slow-fast-slow.

[0113] The following takes Figure 4 the circuit structure shown as an example, and in combination with Figure 7 shown, the time period between time T0 and time T1 is the first time stage, and the temperature of the susceptor 30 rises. The time period between time T1 and time T2 is the second time stage, and the temperature of the susceptor 30 remains basically stable. At time T2, the third time stage begins, and the temperature of the susceptor 30 fluctuates stably within a preset temperature range.

[0114] Among them, Tset2 is the high-temperature threshold, and Tset3 is the low-temperature threshold. At time T3, the controller 62 controls some of the switches from the first switch S1 to the (N - 1)th switch to be turned off, so that in the time period from T3 to T4, the temperature of the susceptor 30 gradually increases from Tset3 to Tset2. In the time period from T4 to T5, the controller 62 controls the power supply to stop supplying power to the induction coil, or the controller 62 outputs a very small power to the induction coil. For example, the controller 62 controls most or all of the switches in the first switch S1 and the (N - 1)th switch to be turned off, so that the susceptor 30 can only receive very little energy. At this time, the temperature of the susceptor 30 gradually decreases from Tset2 to Tset3. At time T6, the controller 62 controls some of the switches from the second switch S2 to the (N - 1)th switch to be turned off, so that in the time period from T6 to T7, the temperature of the susceptor 30 gradually increases from Tset3 to Tset2, but the energy supply duration in the time period from T6 to T7 is longer than that in the time period from T3 to T4. This is because the number of switches turned off in the time period from T6 to T7 is greater than the number of switches turned off in the time period from T3 to T4, so that the capacitance value of the capacitive branch 61 in the time period from T6 to T7 is smaller than the capacitance value of the capacitive branch 61 in the time period from T3 to T4. Therefore, under the same energy supply amount, the energy supply speed will also change.

[0115] Taking the Figure 5 shown circuit structure as an example, combined with Figure 7 shown, the time period between time T0 and time T1 is the first time stage, and the temperature of the susceptor 30 rises. The time period between time T1 and time T2 is the second time stage, and the temperature of the susceptor 30 remains basically stable. Starting from time T2, it enters the third time stage, and the temperature of the susceptor 30 fluctuates stably within the preset temperature range.

[0116] Wherein, Tset2 is a high temperature threshold, and Tset3 is a low temperature threshold. At time T3, the controller 62 controls at least part of the switches from the first switch S1 to the M-1 switch to be disconnected, so that in the T3-T4 time period, the temperature of the sensor 30 gradually increases from Tset3 to Tset2. In the T4-T5 time period, the controller 62 controls the power supply to stop supplying power to the induction coil, or the controller 62 outputs very small power to the induction coil, for example, the controller 62 controls the first switch S1 and most or all of the switches from the M-1 switch to be closed, so that the sensor 30 can only receive very small energy, and the temperature of the sensor 30 gradually decreases from Tset2 to Tset3. At time T6, the controller 62 controls part of the switches from the first switch S2 to the M-1 switch to be disconnected, so that in the T6-T7 time period, the temperature of the sensor 30 gradually increases from Tset3 to Tset2, but the energy supply duration in the T6-T7 time period is longer than the energy supply duration in the T3-T4 time period. This is because the number of switches disconnected in the T6-T7 period is greater than the number of switches disconnected in the T3-T4 period, so that the capacitance of the capacitive branch 61 in the T6-T7 period is smaller than the capacitance of the capacitive branch 61 in the T3-T4 period. Therefore, when the energy supply amount is the same, the energy supply speed will also change.

[0117] It can be seen that, whether it is a parallel capacitive branch 61 or a series capacitive branch 61, by increasing the number of switch disconnections to reduce the capacitance of the capacitive branch 61, that is, by adjusting the capacitance of the capacitive circuit 61 multiple times in the third time stage, the energy input by the induction coil 40 can be reduced, thereby extending the time for the temperature of the sensor 30 to increase from the low temperature threshold to the high temperature threshold. Therefore, under the premise of keeping the output energy of the energy supply time period unchanged, the energy supply time can be extended, and the effect of reducing energy consumption can be achieved.

[0118] In some embodiments, the maximum temperature that the susceptor 30 can reach after energy is supplied for a single energy supply period is not preset, or the maximum temperature that the susceptor 30 can reach may not be monitored. Figure 9 As shown, in the T3-T4 time period, the temperature of the sensor 30 rises from Tmin to Tmax1; and in the T9-T10 time period, the temperature of the sensor 30 can rise from Tmin to Tmax2. In the case of smoke attenuation in the late stage of the inhalation phase, this will help to further improve the smoke. The change in the maximum temperature in these two time periods can be derived from the adjustment of the energy supply amount, or from the simultaneous adjustment of the energy supply amount and the energy supply speed. In some embodiments, the adjustment of the energy supply amount can rely on the adjustment of the output power, or the adjustment of the energy supply duration, or a combination of the two.

[0119] When the heating method provided by the embodiments of the present application is applied to Figure 4 the circuit structure shown in

[0120] Specifically, in one embodiment, when adjusting the capacitance value of the capacitive circuit according to the current time stage of the aerosol generating device in step S602 to make it correspond to the preset capacitance value of the current time stage, the specific implementation process includes the following steps: when the current time stage is the first time stage, correspondingly control all switches to close so that the capacitance value of the capacitive circuit reaches the maximum capacitance value; when the current time stage of the aerosol generating device is the third time stage, correspondingly control at least some switches to open so that the capacitance value of the capacitive circuit is less than the maximum capacitance value.

[0121] Specifically, when the power supply 50 starts to power on, the first time stage starts, and the susceptor 30 is in the preheating and temperature rising process. At this time, the controller 62 controls the first switch S1 to the (N - 1)th switch SN - 1 to be all closed. The capacitance value of the capacitive branch 61 is the capacitance value after the first capacitor C1, the second capacitor C2... the Nth capacitor CN are connected in parallel, and the capacitance value of the capacitive branch 61 is the maximum value. The susceptor 30 can rapidly heat up at the maximum power to reach the first temperature.

[0122] Subsequently, in the second time stage after the end of the first time stage, the controller 62 controls at least J switches among the first switch S1 to the (N - 1)th switch SN - 1 to open, and the other switches except the J switches remain closed. For example, when J = 1, the controller 62 controls the (N - 1)th switch SN - 1 to open, and the first switch S1 to the (N - 2)th switch SN - 2 remain closed. At this time, the capacitance value of the capacitive branch 61 is the capacitance value after the first capacitor C1, the second capacitor C2... the (N - 1)th capacitor CN - 1 are connected in parallel. This capacitance value is less than the capacitance value after the first capacitor C1, the second capacitor C2... the Nth capacitor CN are connected in parallel. It can be seen that in the second time stage, the capacitance value of the capacitive branch 61 is reduced to reduce the energy input to the induction coil 40, so as to reduce the energy obtained on the susceptor 30 and make the internal and external temperatures of the aerosol generating matrix 20 uniform.

[0123] In the third time stage after the end of the second time stage, the controller can adjust the capacitance value of the capacitive branch 61 according to specific requirements, so as to adjust the energy supply amount and / or energy supply speed in each energy supply time period in the third time stage.

[0124] When the heating method provided by the embodiments of the present application is applied to Figure 5 the circuit structure shown in

[0125] Further, in one embodiment, the specific implementation process of adjusting the capacitance value of the capacitive circuit according to the current time stage of the aerosol generating device in step S602 to make it correspond to the preset capacitance value of the current time stage includes the following steps: when the current time stage is the first time stage, correspondingly control all switches to close so that the capacitance value of the capacitive circuit reaches the maximum capacitance value; when the current time stage of the aerosol generating device is the third time stage, correspondingly control at least some switches to open so that the capacitance value of the capacitive circuit is less than the maximum capacitance value.

[0126] Specifically, when the power supply 50 starts to power on, the susceptor 30 is in the preheating and warming-up process. At this time, the controller 62 controls the first switch S1 to the (M - 1)th switch SM - 1 to be all closed, and the capacitance value of the capacitive branch 61 is the capacitance value of the first capacitor C1, and the capacitance value of the capacitive branch 61 is the maximum value. The susceptor 30 can quickly heat up to the first temperature at the maximum power.

[0127] Subsequently, at the moment when the susceptor 30 increases to the first temperature, the controller 62 controls J switches among the first switch S1 to the (M - 1)th switch SM - 1 to open, and the other switches except the J switches remain closed. For example, when J = 1, the controller 62 controls the first switch S1 to open, and the second switch S2 to the (M - 1)th switch SM - 1 remain closed. At this time, the capacitance value of the capacitive branch 61 is the capacitance value after the first capacitor C1 and the second capacitor C2 are connected in series. This capacitance value is less than the capacitance value of the first capacitor C1. It can be seen that after the susceptor 30 increases to the first temperature, the capacitance value of the capacitive branch 61 is reduced to reduce the energy input to the induction coil 40, thereby reducing the input power. On the one hand, the aerosol generating matrix 20 can reach a uniform internal and external temperature in the second time stage; on the other hand, since the energy input to the induction coil 40 is reduced, the purpose of reducing energy consumption can be achieved.

[0128] In some embodiments, the specific implementation process of adjusting the capacitance value of the capacitive circuit according to the current time stage of the aerosol generating device in step S602 includes the following steps: according to the current time stage of the aerosol generating device, adjust the capacitance value and output voltage of the capacitive circuit to make them correspond to the preset capacitance value and preset voltage of the current time stage.

[0129] In this embodiment, the energy supply amount to the susceptor 30 or the speed of supplying energy to the susceptor 30 can be adjusted either by hardware or by software. The hardware method is achieved by adjusting the capacitance value of the capacitive circuit; the software method is achieved by adjusting the output voltage. Thus, the adjustment process can be realized by combining software and hardware, which can improve the adjustment efficiency.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present application as described above. For the sake of brevity, they are not provided in detail; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heating method based on an aerosol generating device, characterized in that, The aerosol generating device includes an induction coil, a susceptor for heating an aerosol generating substrate to generate an aerosol, a capacitive circuit, a controller, and a power source for supplying power to the induction coil. The heating method includes: Determining a current time stage of the aerosol generating device; Adjusting a capacitance value of the capacitive circuit according to the current time stage of the aerosol generating device so that it corresponds to a preset capacitance value of the current time stage; Wherein, after resonance occurs between the induction coil and the capacitive circuit with the adjusted capacitance value, the sensing coil generates a stable changing magnetic field, so that eddy currents are generated in the susceptor in the changing magnetic field to cause the susceptor to heat up.

2. The heating method according to claim 1, characterized in that, The adjusting the capacitance value of the capacitive circuit according to the current time stage of the aerosol generating device so that it corresponds to the current time stage includes: When the current time stage is a first time stage, adjusting the capacitance value of the capacitive circuit so that the capacitance value of the capacitive circuit remains at a maximum capacitance value, wherein the first time stage is a stage in which the temperature of the susceptor increases from an initial temperature to a first temperature.

3. The heating method according to claim 1, characterized in that, The adjusting the capacitance value of the capacitive circuit according to the current time stage of the aerosol generating device so that it corresponds to the current time stage includes: When the current time stage is a second time stage, adjusting the capacitance value of the capacitive circuit so that the capacitance value of the capacitive circuit is reduced below the maximum capacitance value, wherein the second time stage is a stage between reaching the first temperature and sending a suction start signal, and within the second time stage, the temperature of the susceptor drops below the first temperature.

4. The heating method according to claim 1, characterized in that, The adjusting the capacitance value of the capacitive circuit according to the current time stage of the aerosol generating device so that it corresponds to the current time stage further includes: When the current time stage is a third time stage, adjusting the capacitance value of the capacitive circuit so that the capacitance value of the capacitive circuit is reduced below the maximum capacitance value, wherein the third time stage is a stage of generating an aerosol, and within the third time stage, the temperature of the susceptor drops below the first temperature and is within a preset temperature range.

5. The heating method according to claim 4, characterized in that, The third time stage includes multiple energy supply time periods. The heating method further includes: During the energy supply time period, after resonance occurs between the induction coil and the capacitive circuit with the adjusted capacitance value, the sensing coil generates a stable changing magnetic field, so that eddy currents are generated in the susceptor in the changing magnetic field to cause the susceptor to heat up; Wherein, a natural cooling time period is provided between at least some adjacent energy supply time periods.

6. The heating method according to claim 5, characterized in that, The heating method further includes: During the natural cooling time period, determining the temperature of the susceptor, and according to the temperature of the susceptor, determining to end the current natural cooling time period and enter the next energy supply time period; and / or, During the energy supply time period, determining the temperature of the susceptor, and according to the temperature of the susceptor, determining to end the current energy supply time period and enter the next natural cooling time period.

7. The heating method according to claim 5, characterized in that, The heating method further includes: During the energy supply time period, determine the energy supply duration, and according to the energy supply duration, determine to end the current energy supply time period and enter the next natural cooling time period; and / or, During the natural cooling time period, determine the natural cooling duration, and according to the natural cooling duration, determine to stop the current natural cooling time period and enter the next energy supply time period.

8. The heating method according to any one of claims 5-7, characterized in that, When the current time stage is the third time stage, adjusting the capacitance value of the capacitive circuit to make the capacitance value of the capacitive circuit drop below the maximum capacitance value includes: When the current time stage is the third time stage, adjust the capacitance value of the capacitive circuit at least once so that the energy supply amount and / or energy supply speed change during the energy supply time period after adjustment.

9. The heating method according to claim 1, characterized in that, The capacitive circuit includes N capacitive branches connected in parallel. At least N - 1 of the N capacitive branches include switches. Any one of the N capacitive branches includes a capacitor. The switch of any one of the N capacitive branches is connected in series with the capacitor, where N is an integer greater than or equal to 2; adjusting the capacitance value of the capacitive circuit includes: Adjust the number of switches in the at least N - 1 capacitive branches that are turned off.

10. The heating method according to claim 1, characterized in that, The capacitive circuit includes at least M - 1 switches and M capacitors. The M capacitors are connected in series in sequence, and each of at least M - 1 capacitors is connected in parallel with a switch, where M is an integer greater than or equal to 2; adjusting the capacitance value of the capacitive circuit includes: Adjust the number of switches in the at least M - 1 switches that are turned off.

11. The heating method according to claim 9 or 10, characterized in that, The time stage includes a first time stage and a third time stage. The first time stage is when the temperature of the susceptor increases from the initial temperature to the first temperature. The third time stage is when the temperature of the susceptor drops below the first temperature and is within a preset temperature range; adjusting the capacitance value of the capacitive circuit according to the current time stage of the aerosol generating device so that it corresponds to the preset capacitance value of the current time stage includes: When the current time stage is the first time stage, correspondingly control all the switches to be closed so that the capacitance value of the capacitive circuit reaches the maximum capacitance value; when the current time stage of the aerosol generating device is the third time stage, correspondingly control at least some of the switches to be opened so that the capacitance value of the capacitive circuit is less than the maximum capacitance value.

12. The heating method according to claim 1, characterized in that,Adjusting the capacitance value of the capacitive circuit according to the current time stage of the aerosol generating device includes: Adjust the capacitance value and output voltage of the capacitive circuit according to the current time stage of the aerosol generating device so that they correspond to the preset capacitance value and preset voltage of the current time stage.

13. An aerosol generating device, characterized in that, Including: An induction coil for generating a changing magnetic field; A susceptor, which is arranged inside the aerosol generating device or inside the aerosol generating substrate, and is configured to generate eddy currents and heat up in the changing magnetic field, thereby heating the aerosol generating substrate to generate aerosol; A power supply and a capacitive circuit, the induction coil is electrically connected between the power supply and the capacitive circuit, the capacitive circuit is configured to resonate with the induction coil when the power supply is powered on, so that the energy stored in the induction coil is equal to the energy stored in the capacitive circuit, wherein the capacitive circuit includes at least two capacitors and at least one switch, and the at least two capacitors are electrically connected to the at least one switch; A controller, the controller is electrically connected to the at least one switch, and the controller is configured to execute the heating method according to any one of claims 1-12.

14. The aerosol generating device according to claim 13, characterized in that, The capacitive circuit includes N capacitive branches connected in parallel, at least N-1 of the N capacitive branches include switches, and any one of the N capacitive branches includes a capacitor, wherein N is an integer greater than or equal to 2; The switch and the capacitor of any one of the at least N-1 capacitive branches are connected in series.

15. The aerosol generating device according to claim 13, characterized in that, The capacitive circuit includes at least M-1 switches and M capacitors, wherein M is an integer greater than or equal to 2; The M capacitors are connected in series in sequence, and each of at least M-1 capacitors is connected in parallel with a switch.

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